* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Wind Power Plant Dynamic Reactive Power
Pulse-width modulation wikipedia , lookup
Wireless power transfer wikipedia , lookup
Power over Ethernet wikipedia , lookup
Resilient control systems wikipedia , lookup
Three-phase electric power wikipedia , lookup
Wind turbine wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Electrification wikipedia , lookup
Audio power wikipedia , lookup
Variable-frequency drive wikipedia , lookup
Solar micro-inverter wikipedia , lookup
Power factor wikipedia , lookup
Surge protector wikipedia , lookup
Stray voltage wikipedia , lookup
Distributed generation wikipedia , lookup
Electrical substation wikipedia , lookup
Power inverter wikipedia , lookup
Opto-isolator wikipedia , lookup
Control system wikipedia , lookup
Electric power system wikipedia , lookup
Intermittent energy source wikipedia , lookup
Buck converter wikipedia , lookup
Power engineering wikipedia , lookup
Voltage optimisation wikipedia , lookup
Alternating current wikipedia , lookup
History of electric power transmission wikipedia , lookup
Wind Power Plant Dynamic Reactive Power “Hybrid” Solutions to meet ERCOT Reactive Power Capability Requirements Presented at ERCOT ROS Meeting, December 10, 2009 vestas.com The case for engineered wind project “hybrid” reactive power solutions using integrated STATCOM and switched caps/reactors to meet the ERCOT Protocol definition of “dynamic VAR capable devices” • Presented by: • American Superconductor - Narend Reddy • S&C Electric – Ken Mattern • Vestas Americas – Steven Saylors PRR 830, Section 6.5.7.1 (1)) …”The Reactive Power requirements shall be available at all MW output levels and may be met through a combination of the Generation Resource’s Unit Reactive Limit (URL), which is the generating unit’s dynamic leading and lagging operating capability, and/or dynamic VAR capable devices.” 2 | Presentation title, May 23, 2017 Hybrid Reactive Power Dynamic Solutions • The combination of Statcom augmented by switched static reactive elements of capacitors and/or reactors • Provides fast-response, robust design that is dynamically capable integrated solutions to meet Voltage Support Services requirements • Uses Statcom “Overload” capability to ensure VAR output is smooth and linear with voltage over reactive range needed • Yields a Least-Cost design when compared to Full-Sized Statcoms or SVCs 3 | Presentation title, May 23, 2017 • These solutions have proven as acceptable over the last five years on many previous wind projects to various transmission entities • • • • AESO ISO-NE MISO BPA How WPPs can do reactive power control for VSS MAIN TRANSFORMER PCC UTILITY, OWNER, ... POWER PLANT CONTROLLER SCADA MV COLLECTOR BUS MSR 4 | Presentation title, May 23, 2017 STATCOM MSC WTG Example 1 - STATCOM System for Power Factor Correction and LVRT Power Transformer 60/90 MVA with LTC 34.5 kV 115 kV 600V PT 34.5 kV collector system Utility Interconnection Point System Rating for Regulation 600V +48 MVAR/-16 MVAR 48MVAr 16MVAr STATCOM STATCOM 600V 5 | Presentation title, May 23, 2017 System Rating for LVRT +84 MVAR/-48 MVAR Example 2 – 160MW Wind Farm Transmission Voltage PT CT CT CT N.O. 33 kV 33 kV Cap Banks Control Monitoring STATCOM STATCOM Cap Banks Control Reactive Power Control System 6 | Presentation title, May 23, 2017 Wind Farm Voltage Control Dynamic and Steady State Regulation Control Voltage (pu) 1.04 1.03 Buck Hard Limit = 1.025pu 1.02 Reference Voltage = 1.00pu Buck Droop = 2% 1.01 1.00 Boost Droop = 2% Deadband Control Setting Options • Independent boost and buck droops 0.99 • Droop adjustable from 1% to 10% 0.98 • Adjustable reference or target voltages Boost Hard Limit = 0.975pu 0.97 • Optional dead band and D-VAR output limits • Can provide power factor control 0.96 3x 2x 1x Boosting Output 7 | Presentation title, May 23, 2017 1x 2x Bucking Output 3x AMSC STATCOM System Installations for Wind Farms • Over 40 wind farms worldwide use AMSC D-VAR Systems (majority includes static shunt switched devices to provide dynamic support) • Control systems allow seamless integration and switching of static shunt devices • Static shunt devices also configured to address transient grid conditions to complement short term overload capability of D-VAR STATCOM. 8 | Presentation title, May 23, 2017 “Hybrid” STATCOM and Static Shunt Solutions Fully Accepted in: • United Kingdom • +/-0.95 dynamic power factor (pf) at PCC with system response time of 1 second (See following chart) • Alberta (AESO) • -0.95/0.90 pf overall with -0.985/0.95 pf “dynamic” • Ontario (IESO) • +0.35/-0.33pu with dynamic capability • South Australia • +/-0.93pf with 50% dynamic (STATCOM) 9 | Presentation title, May 23, 2017 United Kingdom – Power Factor Capability MW Output 100% Leading (Inductive) Lagging (Capacitive) Full leading at 50% gen 50% Full lagging at 20% gen 38% of leading at 20% gen 20% 15% of leading and lagging at zero gen MVAR 0.33x MW 10 | Presentation title, May 23, 2017 0.33x MW Alberta Electric System Operator 11 | Presentation title, May 23, 2017 WPP MW, Inverter VArs and Net VArs at POI 100 WPP MW MW, MVAR 80 60 40 Cap bank ON WPP Net MVAr 20 INVERTER MVAr 0 Cap bank OFF -20 0 1 2 3 4 5 Hours 12 | Presentation title, May 23, 2017 6 7 8 9 10 11 DSTATCOM Windfarm Installations ±7.5 ±12 MVAr, 9 MVAR, MVAC MVAr, 1x13, 12 3x26 Ireland New Mexico ±6.25 MVAr, 5 x 7.5 MVAC New Mexico ±6.25 MVAr, 1x8MVAR, 2x8MVAC Scotland ±12 MVAr, 3x22 MVAC Oregon 13 | Presentation title, May 23, 2017 System Operation vs. Ideal Charateristic Curve (19/September/2009-12:10:48 to 20/September/2009-12:10:38 UTC) 20.00 19.80 19.60 19.40 Characteristic operating line for the DSTATCOM (1.00 per unit, 4%) kV 19.20 DSTATCOM operating states (10 second samples) 19.00 18.80 18.60 18.40 18.20 -8 -6 -4 -2 MVAr 14 | Presentation title, May 23, 2017 0 2 4 Inductor Turn Off - Test 2 1.100 14 12 10 8 1.050 4 Reactor switch off time 90% point 0.33 seconds 2 1.000 0 -2 -4 -6 0.950 -8 Reaction Time <0.01 seconds -10 -12 0.900 21.5 22.0 22.5 23.0 Time - seconds 15 | Presentation title, May 23, 2017 23.5 -14 24.0 MVAr Votlage Setpoint 6 Voltage Setpoint MVAr Aikengall Scottish Windfarm 19.7 60 19.6 50 19.5 40 30 kVolts 19.4 Capacitor Bank switched on 19.3 20 Capacitor Bank switched off 19.2 10 19.1 0 DSTATCOM adjusts for Cap bank operation Time 16 | Presentation title, May 23, 2017 6/13/2009 04:48:00 6/13/2009 00:00:00 6/12/2009 19:12:00 6/12/2009 14:24:00 6/12/2009 09:36:00 6/12/2009 04:48:00 -10 6/12/2009 00:00:00 19 MW/MVAr External impacts on system voltage Van (kV) VdrFiltered (kV) DSTAT MVAr Windfarm Power (MW) Windfarm VArs (MVAr) ISSDs (MVAr) Thank you for your attention vestas.com Copyright Notice The documents are created by Vestas Wind Systems A/S and contain copyrighted material, trademarks, and other proprietary information. All rights reserved. No part of the documents may be reproduced or copied in any form or by any means—such as graphic, electronic, or mechanical, including photocopying, taping, or information storage and retrieval systems without the prior written permission of Vestas Wind Systems A/S. The use of these documents by you, or anyone else authorized by you, is prohibited unless specifically permitted by Vestas Wind Systems A/S. You may not alter or remove any trademark, copyright or other notice from the documents. The documents are provided “as is” and Vestas Wind Systems A/S shall not have any responsibility or liability whatsoever for the results of use of the documents by you.