Control and protection system for thyristor controlled phase shifter of supergrid

Abstract

The invention provides a control and protection system for a thyristor controlled phase shifter of a supergrid and relates to operational control and protecting circuit devices of alternating current main lines or alternating current power distribution networks and control methods of the protecting circuit devices, in particular to the control and protection system for the thyristor controlled phase shifter used for optimization, regulation and control of the supergrid. The system comprises a management and support subsystem, a phase shifter control subsystem and a monitoring protection subsystem. The phase shifter control subsystem is composed of an analog quantity sampling control unit and a switch switching control unit. The analog quantity sampling control unit comprises a voltage steady-state automatic gear adjustment module, a manual gear adjustment module, a thyristor controlled phase shifter gear adjustment module, a digital phase-locked loop module and a thyristor trigger module. The switch switching control unit comprises an interlocking logic module, a sequential control/remote control module and a circuit breaker/isolating switch motion control module. The interlocking logic module and the sequential control/remote control module are connected to the circuit breaker/isolating switch motion control module. The line power and the target power are monitored in real time, so that steady-state active automatic control is achieved; auxiliary protection and body protection can be provided for a thyristor controlled phase shifter by the monitoring protection subsystem.

Description

technical field [0001] The invention relates to an operation control and protection circuit device of an AC main line or an AC power distribution network and a control method thereof, in particular to a control and protection system of a controllable phase shifter used for optimal regulation of an ultra-high voltage transmission network. Background technique [0002] With the continuous development of the social economy, the growing demand for power supply in life and production has strongly stimulated the rapid development of the power system. The spatial distance between the energy center and the load center is the objective motivation for large-capacity and long-distance transmission of electric energy. In order to meet the needs of power transmission, the size of the power network is increasing day by day. Since the power system is constrained by the thermal stability limit of the equipment, the voltage drop constraint of the transmission line, the N-1 static security c...

AI Technical Summary

Problems solved by technology

This uncontrolled free flow often has to reduce the utilization rate of system equipment or make the system operate in a state where the technical and economic indicators are not very good due to certain constraints on system operation.

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