PDF
... seconds, in increments of 0.01 seconds. Minimum Response Time: Provides a fixed minimum response time, 0.013 to 1.0 seconds, in increments of 0.001 seconds. High Current Trip: Provides a trip at a selectable current value and a selectable time. The high-current ratio is selectable from 1 to 31.5 in ...
... seconds, in increments of 0.01 seconds. Minimum Response Time: Provides a fixed minimum response time, 0.013 to 1.0 seconds, in increments of 0.001 seconds. High Current Trip: Provides a trip at a selectable current value and a selectable time. The high-current ratio is selectable from 1 to 31.5 in ...
A Novel Control Strategy for UPQC under Distorted Source
... [2]-[14]. The majority of the previous studies is based on the p-q theory and requires too many sensors: three sets of current sensors and two sets of voltage sensors as shown in Fig. 1 [2]-[5]. In Fig. 1, in order to compensate distorted voltage and current, harmonic components in the supply voltag ...
... [2]-[14]. The majority of the previous studies is based on the p-q theory and requires too many sensors: three sets of current sensors and two sets of voltage sensors as shown in Fig. 1 [2]-[5]. In Fig. 1, in order to compensate distorted voltage and current, harmonic components in the supply voltag ...
AO26255260
... torque disturbance. The dynamic model of the induction motor is derived by using a two-phase motor in direct and quadrature axes. This approach is desirable because of the conceptual simplicity obtained with two sets of windings, one on the stator and the other in the rotor. The equivalence between ...
... torque disturbance. The dynamic model of the induction motor is derived by using a two-phase motor in direct and quadrature axes. This approach is desirable because of the conceptual simplicity obtained with two sets of windings, one on the stator and the other in the rotor. The equivalence between ...
S280-78-1 (Discontinued Product)
... Line current flowing through the recloser is sensed by three internally mounted bushing-current transformers in the recloser, one for each phase. When the phase current or the zero-sequence (ground) current exceeds its programmed minimum-trip value, the Kyle Type FXA or FXB control initiates the pro ...
... Line current flowing through the recloser is sensed by three internally mounted bushing-current transformers in the recloser, one for each phase. When the phase current or the zero-sequence (ground) current exceeds its programmed minimum-trip value, the Kyle Type FXA or FXB control initiates the pro ...
Aalborg Universitet PMSM Drive Systems
... However, the load torque can be compensated with a feed-forward term setting a torque, i.e. current reference value with a load torque estimator. In this structure, the speed controller looks after its main duty: the speed control actions are independent from the load torque. Load torque compensator ...
... However, the load torque can be compensated with a feed-forward term setting a torque, i.e. current reference value with a load torque estimator. In this structure, the speed controller looks after its main duty: the speed control actions are independent from the load torque. Load torque compensator ...
S275-10-1 (Discontinued Product)
... mechanism permits manual spring charging if motor power is lost. In addition to automatic tripping on fault current, the Type Cl can be tripped with either a remote contact, or the manual control switch on the control panel, or with the mechanically linked tripreset lever on the front of the mechani ...
... mechanism permits manual spring charging if motor power is lost. In addition to automatic tripping on fault current, the Type Cl can be tripped with either a remote contact, or the manual control switch on the control panel, or with the mechanically linked tripreset lever on the front of the mechani ...
Functional Description of PIC16F877A Functions and Interfaces to
... positioners, five RF transfer switches for filter in/out selections, and two SP5T RF switches for antenna selection in each of two RF signal paths back to the lab via optical fiber. The positioners and switches are controlled remotely using a 40-pin MicroChip 16F877A microcontroller at the monitor s ...
... positioners, five RF transfer switches for filter in/out selections, and two SP5T RF switches for antenna selection in each of two RF signal paths back to the lab via optical fiber. The positioners and switches are controlled remotely using a 40-pin MicroChip 16F877A microcontroller at the monitor s ...
SP6T RF Switch - Mini Circuits
... Low loss and high power capability enable a single switch to be used for a variety of applications, saving inventory. ...
... Low loss and high power capability enable a single switch to be used for a variety of applications, saving inventory. ...
Genetic Algorithm Based Pole Placement Controller for
... the centre of attention. STATCOM is a shunt-connected device that is used to provide reactive power compensation to a transmission line. Through regulation of the line voltage at the point of connection, STATCOM can enhance the power transmission capability and thus extend the steady-state stability ...
... the centre of attention. STATCOM is a shunt-connected device that is used to provide reactive power compensation to a transmission line. Through regulation of the line voltage at the point of connection, STATCOM can enhance the power transmission capability and thus extend the steady-state stability ...
PDF
... in multilevel power conversion technology was triggered by the work of Nabae, etal,who introduced the neutral-point clamped (NPC) inverter topology. It was immediately recognized that this new converter had many advantages over the more conventionaltwo-level inverter. Later, in the early nineties th ...
... in multilevel power conversion technology was triggered by the work of Nabae, etal,who introduced the neutral-point clamped (NPC) inverter topology. It was immediately recognized that this new converter had many advantages over the more conventionaltwo-level inverter. Later, in the early nineties th ...
Aalborg Universitet Droop-Controlled Microgrid
... frequency and amplitude deviations which are produced by the power droop controllers and output impedances. A similar approach for frequency restoration is adapted in [33], but, instead of a central secondary control, a PI controller is added locally in the droop controller of each DG. This way, the ...
... frequency and amplitude deviations which are produced by the power droop controllers and output impedances. A similar approach for frequency restoration is adapted in [33], but, instead of a central secondary control, a PI controller is added locally in the droop controller of each DG. This way, the ...
S280-42-1
... • Is trained in industry-accepted high- and low-voltage safe operating practices and procedures. • Is trained and authorized to energize, de-energize, clear, and ground power distribution equipment. • Is trained in the care and use of protective equipment such as flash clothing, safety glasses ...
... • Is trained in industry-accepted high- and low-voltage safe operating practices and procedures. • Is trained and authorized to energize, de-energize, clear, and ground power distribution equipment. • Is trained in the care and use of protective equipment such as flash clothing, safety glasses ...
Resilient control systems
In our modern society, computerized or digital control systems have been used to reliably automate many of the industrial operations that we take for granted, from the power plant to the automobiles we drive. However, the complexity of these systems and how the designers integrate them, the roles and responsibilities of the humans that interact with the systems, and the cyber security of these highly networked systems has led to a new paradigm in research philosophy for next generation control systems. Resilient Control Systems consider all of these elements and those disciplines that contribute to a more effective design, such as cognitive psychology, computer science, and control engineering to develop interdisciplinary solutions. These solutions consider such things such as how to tailor the control system operating displays to best enable the user to make an accurate and reproducible response, how to design in cyber security protections such that the system defends itself from attack by changing its behaviors, and how to better integrate widely distributed computer control systems to prevent cascading failures that result in disruptions to critical industrial operations. In the context of cyber-physical systems, resilient control systems are an aspect that focuses on the unique interdependencies of a control system, as compared to information technology computer systems and networks, due to its importance in operating our critical industrial operations.