Download ISO Rules Part 500 Facilities Division 502 Technical Requirements

ISO Rules
Part 500 Facilities
Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
External Consultation Draft
Version 23.0
November 29, 2012October 5, 2015
Applicability
1
Section 502.5 applies to:
(a) the legal owner of a generating unit that is:
(i) synchronous; and
(ii) directly connected to the transmission system or to transmission facilities within the
City of Medicine Hat;,
including:
a generating unit situated within an industrial complex that is directly connected to the
transmission system, but not including any aggregated generating facilities;
but not including:
(i) any wind aggregated generating facilities;
(b) the legal owner of a transmission facility; and
(c) the ISO.
Requirements
Functional Specification
2(1) The Prior to energization of a generating unit, the ISO must, in accordance and generally
consistent with this section 502.5 and any other applicable ISO rules, approve of a functional
specification
containing further details, work requirements, and specifications for the design, construction and
operation of a
generating unit connection project and any associated transmission system connection facilities.
(2) The functional specification for the generating unit referred to in subsection 2(1) must be generally
consistent with the provisions of this section 502.5 and any other applicable ISO rules, but may contain
material variances the ISO approves of based upon its discrete analysis of any one (1) or more of the
technical, economic, safety, operational and reliability requirements of the interconnected electric
system related to the specific connection project.
Successor to Prior Requirements
3(1) Subject to subsection 2,4(3), this section 502.5 succeeds and replaces sections 1.0, 2.0 and 3.0 as
they relate to generation of of
the Generation and Load Interconnection Standard, which came into effect as of September 19, 2006, as
those sections relate to generation.
(2) The Generation and that standard,Load Interconnection Standard referred to in subsection 3(1),
together with any other prior standards or drafts of standards on the subject matter, will no longer will be
in force and effect as of the [effective date of this section 502.5.].
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ISO Rules
Part 500 Facilities
Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
Maximum Authorized Real Power
4(1) The legal owner of a generating unit must, upon receiving a request from the ISO, determine the
maximum authorized real power value for the generating unit. and provide this value to the ISO.
(2)
The legal owner of a generating unit must consider the following when determining the
maximum authorized real power:
(a) compliance with the reactive power requirements set out in subsection 7;
(b) compliance with all other subsections of this section 502.5; and
(c)
turbine and stator winding capability or other limitations under optimal conditions. when determining
the maximum authorized real power for the generating unit.
(3) The ISO must deem the maximum authorized real power for a generating unit to be the
”“maximum authorized MW” the ISO previously approved in writing or in the functional specification for
the generating unit, but only if the generating unit continues to meet all conditions of that approval.
Reactive Power Requirements for a Generating Unit
5(1) The For the purposes of determining the reactive power requirements of this section 502.5, the
legal
owner of a generating unit must determine the root mean square phase-to-phase voltage value at the
stator winding terminals of the generating unit, to be used as the one hundred percent (100%)1.00 per
unit voltage value to determine the reactive power requirements for the generating unit.
(2) TheA generating unit and any approved external reactive power resources approved under
subsection 5(7) must have the capability to operate in accordance with the requirements of this
subsection 5(3) by both:
(a) manual control of the set point of the automatic voltage regulator of the generating unit; and
(b) automated action of the automatic voltage regulator of the generating unit.
(3)
The(3) Subject to the exception in subsection 5(5), the reactive power capability of the
generating unit must be in compliance with the following minimum requirements:
(a) zero point nine (0.9) power factor, over-excited; and
(b) zero point nine five (0.95) power factor, under-excited;
based on the maximum authorized real power of the generating unit over the entire real power
operating range, down to the applicable minimum gross real power.
(4) TheSubject to the exception in subsection 5(5), a generating unit, subject to subsections 5(5),
must not have limiters set to reduce the reactive power capability set out in subsection 5(3).
(5) The legal owner of a generating unit withthat has the capability to meet the reactive power
requirements of this subsection 5 but whichthat has stability concerns must submit in writing to the ISO:
(a) a request for approval of a proposed reduction in the reactive power capability requirement set
out in subsection 5(3)(b) due to generating unit stability concerns; and
(b) a detailed study in support of the request, which is specific forto the generating unit at its
location and completed by a qualified professional engineer, demonstrating that the reactive
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Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
power capability set out in subsection 5(3)(b) should be reduced by a limiter because that
reactive power capability will cause the generating unit to become unstable.
(6) The ISO must make a decision on its approval and notify the legal owner in writing of the decision
no later than ninety (90) days after the date of receiving the submission set out in subsection 5(5).
(7) The legal owner of a generating unit without the capability to meet the reactive power capability
set out in subsection 5(3) must submit to the ISO a request in writing for approval of the use of an
external dynamic reactive power resource to compensate for the lack of capability, such that the
combined capability of the generating unit and the external dynamic reactive power resource meets the
requirements of subsection 5(3).
Voltage Ride-Through Requirements for Existing Generating Units
6(1) This subsection 6 applies to the legal owner of a generating unit without a functional specification
referencing this section 502.5 and which:
referencing this section 502.5 and which such generating unit:
(a) has a maximum authorized real power greater than nine (9).0 MW; or:
(b) is a part of a complex with other generating units with an aggregate maximum authorized
real power amount greater than nine (9).0 MW.
(2)
The(2) For the purposes of determining the voltage ride-through requirements of this section
502.5, the legal owner of a generating unit must determine the root mean square phase-to-phase
voltage value at the high voltage side of the transmission system step-up transformer, to be used as the
one hundred percent (100%)1.0 per unit voltage value to determine the voltage ride-through
requirements for the generating unit..
(3) AThe legal owner of a generating unit must be capable of meeting the ensure that the
generating unit is designed to meet all of the following voltage ride-through requirements:
(a) continuous operation between ninety percent (0.90%) and one hundred and ten percent
(110%)1.10 per unit of the voltage value documenteddetermined under subsection 6(2); and
(b) not tripping or going off-line during or, as a result of, a voltage dip or post-transient voltage
deviation resulting from a normally cleared disturbance on the transmission system, on any
phase or combination of phases at or beyond the point of connection as illustrated, in
accordance with the timing requirements of Appendix 1.; and
(4) The (c)
the amount of time that the voltage of the generating unit remains at 0.15 per
unit must be at least the normal clearing time used in subsection 6for a three (3)(b) must be
based on) phase fault at the specific location where the generating unit is connected to the
transmission system.
(54) Notwithstanding any other provision of this subsection 6, a generating unit is not required to ridethrough a transmission system fault that:
(a) causes a forced outage of a radial transmission line connecting the generating unit to the
transmission system;
(b) occurs on the generating unit side of the point of connection, including the lowerlow voltage
network and the substation; or
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Section 502.5 Generating Unit Technical Requirements
(a) (c)
results in the activation of a transfer trip or anti-islanding protection scheme to activate at
the generating unit; or
which will cause the generating unit to be disconnected from the transmission system.
Voltage Ride-Through Requirements for New Generating Units
7(1) This subsection 7 applies to the legal owner of a generating unit with a functional specification
referencing this rule 502.5 and which:
(a)
referencing this section 502.5 and which such generating unit:
(a) has a maximum authorized real power greater than nine (9).0 MW; or:
(b) (b) is a part of a complex with other generating units with an aggregate maximum
authorized real power amount greater than nine (9).0 MW;
(2)
The(2) For the purposes of determining the voltage ride-through requirements of this section
502.5, the legal owner of a generating unit must determine the root mean square phase-to-phase
voltage value at the transmission system step-up transformer of the generating unit, to be used as the
one hundred percent (100%)1.0 per unit voltage value to determine the voltage ride through
requirements for the generating unit..
(3) The legal owner of a new generating unit must ensure the generating unit is capabledesigned to
meet all of meeting the following voltage ride-through requirements:
(a) continuous operation between ninety percent (0.90%) and one hundred and ten percent
(110%) 1.10 per unit of the voltage value documenteddetermined under subsection 7(2); and
(b) not tripping or going off-line during or, as a result of, a voltage dip or post-transient voltage
deviation resulting from a normally cleared disturbance on the transmission system
disturbance, on any phase or combination of phases at or beyond the point of connection as
illustrated, in accordance with the timing requirements of Appendix 2; and
(c) the amount of time that the voltage of the generating unit remains at zero point zero percent
(0.0%).0 per unit must be based onat least the normal clearing time for a three (3) phase fault
at the specific location where the generating unit is connected to the transmission system.
(4) The normal clearing time used in subsection 7(3)(b) must be based on the specific location where
the generating unit is connected to the transmission system.
(5(4) Notwithstanding any other provision of this subsection 7, a generating unit is not required to ridethrough a transmission system fault that:
(a) (a) causes a forced outage of a radial transmission line connecting the generating unit to
the transmission system;
(b) (b) occurs on the generating unit side of the point of connection, including the lowerlow
voltage network and the substation; or
(c) (c)
results in the activation of a transfer trip or anti-islanding protection scheme to activate at
the generating unit which will causecauses the generating unit to be disconnected from the
transmission system.
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Part 500 Facilities
Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
Automatic Voltage Regulator
8(1) A generating unit must have a continuously variable, continuously acting, closed loop, centralized
automatic voltage regulator that compares a measured voltage compared to a set point, and
must control any dynamic reactive power resources needed to meet the requirements of this
section 502.5.:
(a) (2)
The automaticcompares a measured voltage regulator must:to a set point;
(b) becontrols any dynamic reactive power resources needed to meet the requirements of this
section 502.5;
(b)(c)
is designed to be continuously in service and controlling while the generating unit is
connected to the transmission system, regardless of the quantity of real power output from
the generating unit under both non-disturbance and disturbance conditions;
(c)(d)
beis capable of operating in a voltage set point control mode, to the exclusion of any other
modes;
beis capable of manual set point adjustments to a percentage between ninety five
percent (0.95%) per unit and one hundred and five percent (105%)1.05 per unit of the
operating voltage value determined under subsection 65(1); and
(d)(e)
(e)(f)
in combination with the generating unit facilities be, is able to achieve, under non-disturbance conditions, a steady state voltage regulation of plus or minus zero point five
percent (+/- 0.5%)0.5% of the voltage set point at the point of control which, subject to
subsections 8(3) through 8(6), is at the stator winding terminals of the generating unit.
(32) The legal owner of a generating unit may submit a request in writing to the ISO for approval to
use a reactive current compensation feature in the automatic voltage regulator to adjust the point of
control to be other than the stator winding terminals of the generating unit.
(43) The ISO must make a decision on its approval and notify the legal owner in writing of the decision
no later than ninety (90) days after the date of receiving the submission set out in subsection 8( 3). 2).
(5)
The(4)
A generating unit must be designed so that the point of control for the automatic
voltage regulator mustis not be at the high voltage side of the transmission system step-up
transformer.
(6)
If(5)
A generating unit must be designed so that, if the stator winding terminals of two (2) or
more generating units are connected to a common bus with no significant impedance between the stator
winding terminals, then the automatic voltage regulator of each generating unit must be capable of
reactive current compensation such that, the point of control is within the impedance of the generating
units.
(7)
If(6)
A generating unit must be designed so that, if the automatic voltage regulators of two
(2) or more generating units have a common measurement point, then there must beis reactive current
compensation in each automatic voltage regulator.
(87) Stator current limiters are prohibited for a generating unit.
Frequency and Speed Governing Requirements
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Part 500 Facilities
Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
9(1) A generating unit with a maximum authorized real power equal to or greater than ten (10) MW
must
have a continuously acting governor system, which must be designed:
(a) to be continuously in service, controlling and free to respond to frequency changes and
controlling the response to frequency changes while the generating unit is connected to the
transmission system and regardless of the quantity ofis producing any real power output
fromas measured at the generating unitgenerator stator winding terminals;
(b) with a droop setting equal to or greater than three percent (3%)% but less than or equal to five
percent (5%);%;
(c) with a deadband, intentional plus unintentional, not exceeding plus or minus zero point zero
three six (0.036) Hz; and
(d) with the capability, in combination with the generating unit facilities, of manual setpoint
adjustments within a range of fifty-nine point four (59.4) Hz and sixty point six (60.6) Hz.
(2) TheA generating unit must be designed not to trip for under-frequency and over-frequency
deviations for the minimum time frames as set out in Appendix 3.
(3) Notwithstanding subsection 9(2), a generating unit that trips off in a shorter period than the
minimum time set forth in Appendix 3 must have binding and firm arrangements to automatically and
simultaneously trip off an amount of load in MW on the interconnected electric system equal to the
anticipated generation loss in MW, at comparable frequency levels.
Power System Stabilizer
10(1) If a generating unit:
(a) has a maximum authorized real power greater than twenty-seven (27) MW; or
(b) is a part of a complex with other generating units with an aggregate maximum authorized
real power amount greater than sixty-seven point five (67.5) MW;
then a power system stabilizer must be installed on each generating unit.
(2) If the legal owner of a generating unit replaces the exciter or automatic voltage regulator on a
planned basis at any time after November 18, 1993, and the generating unit:
(a) has a maximum authorized real power greater than twenty-seven (27) MW; or
(b) is a part of a complex with other generating units with an aggregate maximum authorized real
power amount greater than sixty-seven point five (67.5) MW;
then a power system stabilizer must be installed on each generating unit.
(3) Notwithstanding subsection 1110(1) and 1110(2), a power system stabilizer is not required to be
installed on a generating unit if the closed loop phase lag between the generating unit voltage at the
stator winding terminals voltage and the automatic voltage regulator reference input is greater than one
hundred and thirty five135 degrees (135). .
(4)
If a pump storage generating unit is equipped with a power system stabilizer and is capable of
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Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
operating in the pump mode while connected to a transmission system such that the power system
stabilizer does not produce negative damping, then the power system stabilizer must be designed to be in
service in the pump mode.
(5)
A power system stabilizer must:
(a) be designed to be in continuous operation while the generating unit is on-line, except for when
the generating unit is producing less real power than its design limit for effective power
system stabilizer operation;
(b) be reviewed and retuned if any automatic voltage regulator response parameters for the
generating unit are modified;
(c) be either:
(i) a dual input integral of accelerating real power type; or
(ii) a single input speed or frequency type;
(d) provide a compensated frequency response of the excitation system and generating unit such
that, through the frequency range from zero point one (0.1) Hz to one point zero (1.0) Hz, the
phase shift will not exceed plus or minus thirty (±30) degrees;
(e) be capable of output limits between plus or minus five percent (±5%)% of the operating voltage
value submitted under subsection 65(1)(b) and be approved by the ISO under subsection
5(6(2);
(f) have the gain set to provide a gain margin of no less than six (6) dB and no more than ten (10)
dB; and
(g) have the washout time constant set as low as possible while maintaining the compensated
phase criteria.
(6)
A power system stabilizer of the real power type is prohibited for a generating unit.
Transmission System Step-Up Transformer
11(1) The legal owner of a generating unit must ensure that the capability of the transmission system
step-up transformer for athe generating unit must beis such that the real power and reactive power
requirements specified in this section 502.5 are fully available throughout the continuous operating
voltage range for the generating unit, and must consider the following parameters:
voltage range for the generating unit.
(2) The legal owner of a generating unit must, in determining the capability of the transmission
system step-up transformer under subsection 11(1), consider the following:
(a) thermal capability of:
(i) bushings;
(ii) windings; and
(iii) tap changer;
(b) voltage ratio;
(c) tap changer type; and
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Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
(d) tap changer range.; and
(e) (2) Theany other components that may limit the thermal capability of the transmission
system step-up transformer.
(3) To meet the requirements of subsection 11(1), the legal owner of a generating unit may subtract
the amount of auxiliary and excitation system load in apparent power from the apparent power
capability of the generating unit at the maximum authorized real power to determine the net real
power and reactive power requirements of the transmission system step-up transformer referred to in
subsection 11(1),, but only if any of that auxiliary and excitation system load is connected between the
generating unit stator winding terminals and the transmission system step-up transformer.
(34) Subject to subsection 11(45), the legal owner of a generating unit must ensure that the
transmission system step-up transformer winding connections for athe generating unit must provide
for:
(a) a favourable circuit to block the transmission of harmonic currents;
(b) isolation of transmission system and low voltage side ground fault current contributions;
(c) an effectively grounded wye connection on the high voltage side of the transformer; and
(d) on-load or off-load tap changers with a minimum capability of plus or minus five percent
(5%)% voltage range in two point five percent (2.5%)% increments.
(5)
Notwithstanding subsection 11(4) The the legal owner of a generating unit:
(a) (a)
without a functional specification referencing this section 502.5; and
(b) (b) with a transmission system step-up transformer that does not comply with the
requirements of subsection 11(3);
is exempt from complying with subsection 11(34), but if at any time after the [effective date of this
section 502.5,], the transmission system step-up transformer is replaced on a planned basis,
then the legal owner must ensure the replacement equipment meets the requirements of
subsection 11(34).
Auxiliary Systems
12(1) Within facilities withWhen multiple generating units:
are at a common location, the auxiliary systems of each
generating unit must have auxiliary systems be designed sosuch that :
(a) the failure of a single component will not result in the simultaneous tripping or shutdown of two
(2) or more generating units;
(b) staggered shutdowns must have timeframes of greaterof each generating unit must be
separated in time by more than ten (10) minutes; and
(c) for combined cycle plants, the loss of the combustion turbine that results in the tripping of the
steam turbine is acceptable.
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Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
(2) The design of the auxiliary systems of each generating unit must considerbe designed to take into
account the voltage ride-through requirements as specified in the applicable subsection 6 or 7, as
applicable.
(3) The legal owner of a generating unit without a functional specification referencing this section
502.5 but with auxiliary systems that do not comply with the requirements of subsection 12(1) is exempt
from complying with subsection 12(1).
Generating Unit Disconnection and Interrupting Devices
13(1) The legal owner of the generating unit and the legal owner of the transmission facility to which
the generating unit is connected must ensure that there are circuit breakers and controls
which electrically disconnect the generating unit from the transmission system at the point
of connection.
the generating unit is connected must ensure that there are circuit breakers and controls that will
electrically disconnect the generating unit from the transmission system at the point of connection.
(2) The circuit breaker design for the generating unit must account for the present and future fault
current contributions from both the transmission system and the generating unit facilities.
(3) The legal owner of a generating unit and the legal owner of the transmission facility to which
the generating unit is connected must not use of fuses at sixty (60) kV or higher is prohibitedto meet
any of the requirements of this subsection 13.
Isolating Devices
14(1) The legal owner of a generating unit and the legal owner of the transmission facility to which
the generating unit is connected must ensure that :
(a) the generating unit has a minimum of one (1) isolation device with manual operation capability
at a point of isolation.; and
(b) (2)
Thethe isolation device must (s) referred to in subsection 14(1)(a):
(i) permit visual verification of electrical isolation and have the capabilityare capable of being
locked open with multiple locks.;
(3) All isolating devices must be(ii) are under the control of a single control authority, as
agreed toconfirmed by a joint operating agreement between the legal owner of the
generating unit and the legal owner of the transmission facility,; and the agreed to
control authority must be confirmed in a joint operating agreement.
(4) The isolation device must (iii)
permit the installation of temporary safety grounding so
that either side of the isolation device can be safely maintained when the other side is
energized.
(52) The legal owner of a generating unit without a functional specification referencing this section
502.5 is exempt from the requirements of subsection 14(4). 1)(b)(iii).
Power Quality
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Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
15(1) The generating unit must be designed to meet the following power quality requirements:
the induced voltage as measured at the point of connection must:
(a) for flicker, the induced voltage must:
(i) be in compliance with the specifications set out in the version of the International
Electrotechnical Commission 61000-3-7, Electromagnetic compatibility (EMC) – Part 3-7:
Limits - Assessment of emission limits for the connection of fluctuating installations to MV,
HV and EHV power systems that:
(A) for a generating unit with a functional specification referencing this section 502.5, is
in effect as of the date the ISO first approves of the functional specification for the
generating unit connection project; or
(B) for a generating unit without a functional specification referencing this section 502.5,
was in effect as of September 19, 2006; and
without limiting the generality of subsection 15(1)(a)(i), (ii)
be in compliance with the short
and long term flicker limits as set out in the following Table 1:
Table 1
Short and Long Term Flicker Limits
Planning Levels
Pst
0.8Plt
Plt0.8
0.6
where:
Pst is the magnitude of the resulting short term flicker level for the considered aggregation of
flicker sources (probabilistic value);
Plt is the magnitude of the resulting long term flicker level for the considered aggregation of
flicker sources (probabilistic value);
(b)
itand
(iii) meet the:
(A) 99% probability weekly value for Pst; and
(B) 95% probability weekly value for Plt
based on a measurement period of one (1) week of normal operation of the generating
unit;
(a)(b)
for harmonics, the generating unit must be in compliance with the specifications set out
in the version of the IEEE Standard 519, Recommended Practices and Requirements for
Harmonic Control in Electrical Power Systems – Section 11 that:
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Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
(i) for a generating unit with a functional specification referencing this section 502.5, is in
effect as of the date the ISO first approves of the functional specification for the
generating unit connection project; or
(ii) for a generating unit without a functional specification referencing this section 502.5,
was in effect as of September 19, 2006;
(a) all measurements must be at the point of connection;
(b)(c)
(c)
for resonance, the generating unit must not introduce any resonance into the
transmission system, including self-excitation of induction machines, transformer
ferroresonance, resonant effects of capacitor additions and the capacitance of the cables of the
generating unit;
(d) it must not increase the phase-to-phase voltage unbalance of the transmission system by
more than one percent (1.0%), as measured at the point of connection; and
(e) the voltage imbalance percentage requirement referenced in subsection 15(1)(d) must be
based on normal operating conditions for ninety five percent (95%) of the time over any
continuous seven (7) day measurement period, calculated in accordance with the following
formula:
100 x deviation from average
Voltage Unbalance =
Average
Grounding
16
The legal owner of a A generating unit must design the generating unit to take into account be
designed to operate within a transmission system that the transmission system operates as an
effectively grounded system.
Lightning and Other Surge Protection
17(1) A generating unit must havebe equipped with surge protection for any associated substation
equipment, and the conditions under which the.
(2) The surge protection referred to in subsection 17(1) must operate includeunder the following
conditions:
(a) lightning, including the average isokeraunicground falsh density level for the generating unit
location;
(b) switching surges;
(c) neutral shifts;
(d) electrical islands; and
(e) temporary over-voltages.
(23) The surge protection for the generating unit referred to in subsection 17(1) must be compatible
with the connecting transmission facility connected to the generating unit to ensure coordination of
insulation levels.
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Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
Synchrophasor Measurement System
18(1) A new generating unit or an existing generating unit that undergoes a modification replacing the
(2)
protection system must have a synchrophasor measurement system in compliance with the
specifications contained in any related synchrophasor measurement system rule or standard.
Synchrophasor measurements must be recordedprotection system must be equipped with a
synchrophasor measurement system.
(2) The synchrophasor measurement system referred to in subsection 18(1) must be designed to
record at the following locations:
(a) at the stator winding terminal of the generating unit for all three (3) phase-to-ground voltages
and currents; and
(b) at the high side of the step-up transformer of the generating unit for all three (3) phase--toground voltages and currents.
(3) The legal owner of the generating unit must design a synchrophasor measurement system that is
capable of downloading and retaining the recordings set out in subsection 18(2) for a period of not less
than one (1) calendar year from the date of the initial recording unless the ISO indicates otherwise
designates in the functional specification for the generating unit,.
(4) As of the [effective date of this section 502.5], the legal owner of any generating unit without a
functional specification referencing this section 502.5 is exempt from the requirements of this subsection
18 but, if at any time after that [effective date of this section 502.5] the protection system is replaced
on a planned basis, then the replacement equipment must include a synchrophasor measurement system
that meets the requirements of this subsection 18.
Internal Sequence of Event Monitoring
19(1) Subject to subsection 19(4)), a generating unit must have an internal sequence of event
monitoring
system that initiates an event record for every event that results in a trip of the generating unit, or for the
status of key components, including if present:
status of key components, including if present:
(a) a governor system trip;
(b) an automatic voltage regulator trip, including:
(i) over-excitation limiter action; and
(ii) under-excitation limiter action;
(c) a medium and low voltage switchgear and motor control centre protection trip;
(d) the status of key auxiliary components, including:
(i) induced draft and forced draft fans;
(ii) boiler feed water pumps;
(iiiii) turbine inlet valves; and
(iv) medium and low voltage switchgear and motor control centres; and
(e) a mechanical protection trip.
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Section 502.5 Generating Unit Technical Requirements
(2) The legal owner of the generating unit must design a sequence of event monitoring system that is
capable of downloading and retaining the recordings set out in subsection 19(1) for noa period of not less
than one (1) calendar year from the date of the initial recording.
(3) The sequence of event monitoring equipmentsystem must be synchronized to within one (1)
millisecond of the Coordinated Universal Time scale.
(4) As of the [effective date of this section 502.5,], the legal owner of a generating unit withwithout
a functional specification referencing this section 502.5 with an internal sequence of event monitoring
equipmentsystem that is incapable of monitoring and recording any specific event or component set out
in subsection 19(1) is exempt from monitoring and recording of that specific event or equipment, but if at
any time after the effective date the sequence of event monitoring equipmentsystem is replaced, then
the replacement equipmentsystem must meet the monitoring and reporting requirements of this
subsection 19.
Appendices
Appendix 1 –Voltage Ride -Through Requirements for Existing Generating Units
Appendix 2 – Voltage Ride-Through Requirements for New Generating Units
Appendix 3 – Frequency Ranges
Revision History
EffectiveDate
yyyy-mm-dd
Description
Initial release.
Issued for Market Participant
Consultation: 2015-10-05
Page 13
Confidentiality Classification
ISO Rules
Part 500 Facilities
Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
Appendix 1
Voltage Ride-Through Requirements for–
Existing Generating Units
High Voltage Ride Through Duration
Overvoltage
Undervoltage
(percent)Voltage (per
(percent)Time
unit)
110 %
90 %
-> 1.100
Instantaneous trip
≤ 1.10
Continuous operation
Low Voltage Ride Through Duration
Voltage (per unit)
Time
N/A (continuous operating range)
80.< 0 %.15
404 to 9 Cycles
15.< 0 %.80
4 to 940 Cycles
≥ 0.90
Continuous operation
120%
110%
Voltage at Point of Connection (Percent)
100%
90%
Post Transient
Voltage Deviation
40 cycles @ 80%
80%
70%
60%
50%
40%
30%
20%
10%
Transient
Voltage
Deviation
4 to 9 cycles
(Normal
Clearing Time)
0%
-1.0
-0.5
Transient
Voltage No Trip
Zone
625 milliseconds
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Tim e (seconds)
Issued for Market Participant
Consultation: 2015-10-05
Page 14
Confidentiality Classification
ISO Rules
Part 500 Facilities
Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
Issued for Market Participant
Consultation: 2015-10-05
Page 15
Confidentiality Classification
ISO Rules
Part 500 Facilities
Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
Issued for Market Participant
Consultation: 2015-10-05
Page 16
Confidentiality Classification
ISO Rules
Part 500 Facilities
Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
Appendix 2
Voltage Ride-Through Requirements for –
New Generating Units
High Voltage Ride Through Duration
Overvoltage
Undervoltage
(percent)Voltage (per
(percent)Time
unit)
Low Voltage Ride Through Duration
Voltage (per unit)
Time
110 %
90 %
N/A (continuous operating range)
-
75 %
3.0 seconds
-
65 %
115 %≥ 1.200
117.5 %≥ 1.175
-≥ 1.15
120 %≥ 1.10
-< 1.10
2.0 seconds
-Instantaneous trip
-0.20 seconds
0.350 seconds
-1.00 seconds
1.< 0 seconds.45
< 0.65
< 0.75
< 0.90
≥ 0.0 %90
Continuous operation
4 to 9 cycles
0.530 seconds
2.00 seconds
0.23.00 seconds
4 to 9 CyclesContinuous
operation
130%
0.2 seconds @ 120%
0.5 seconds @ 117.5%
1.0 seconds @ 115%
120%
110%
Voltage at Point of Connection (Percent)
100%
90%
80%
3.0 seconds
@ 75%
70%
2.0 seconds
@ 65%
60%
50%
0.3 seconds
@ 45%
40%
30%
20%
10%
4 to 9 cycles (Normal
Clearing Time) @ 0.0%
0%
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Time (seconds)
Issued for Market Participant
Consultation: 2015-10-05
Page 17
Confidentiality Classification
ISO Rules
Part 500 Facilities
Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
Issued for Market Participant
Consultation: 2015-10-05
Page 18
Confidentiality Classification
ISO Rules
Part 500 Facilities
Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
Appendix 3
Frequency Ranges
High Frequency Duration
Under-Frequency Limit
Low Frequency Duration
Minimum Time (seconds)
(Hz)
N/A (continuous operating
60.0 Hz to < 60.6 Hz≤57.0
range)Instantaneous trip
Over-Frequency Limit
Time (seconds)
(Hz)
> 59.4 Hz≥ 61.7
Instantaneous trip
≤ 59.4 Hz
≥60.6 Hz
30 seconds
3 minutes
≥61.6 Hz
≥60.6
≤ 57.3 Hz<60.6
180
Continuous operation
≤ 57.0 Hz
≥61.7 Hz
≤57.3
≤ 57.8 Hz
45 cycles≤ 58.4
instantaneous trip≤ 59.4
> 59.4
0.75
7.5 seconds
30
180
Continuous operation
62.5
Instantaneous tripping is
permited at 61.7 Hz and above.
< 61.7 and > 61.6 Hz @ 30 s
62
61.5
< 61.6 and > 60.6 Hz @ 180 s
61
60.5
Frequency (Hertz)
60
> 59.4and < 61.6Hz = continuous operation
59.5
59
> 58.4 and < 59.4 Hz @ 180 s
58.5
> 57.8 and < 58.4 Hz @ 30 s
58
> 57.3 and < 57.8 Hz @ 7.5 s
57.5
> 57 and < 57.3 Hz @ 0.75 s
57
Instantaneous tripping is
permitted at 57.0 Hz and below.
56.5
56
-50
0
50
100
150
200
250
300
Time (seconds)
Under Frequency Requirement
Issued for Market Participant
Consultation: 2015-10-05
Page 19
Over Frequency Requirement
Confidentiality Classification
ISO Rules
Part 500 Facilities
Division 502 Technical Requirements
Section 502.5 Generating Unit Technical Requirements
62.5
62
61.5
61
60.5
Frequency (Hertz)
60
Generating Unit may not trip in this zone
59.5
59
58.5
58
57.5
57
56.5
56
-50
0
50
100
150
Time (seconds)
200
250
300
Under Frequency Requirement
Issued for Market Participant
Consultation: 2015-10-05
Page 20
Confidentiality Classification