Dynamic Simulation of Thyristor Controlled Reactance Series Compensator by Adjustable Coupling

In order to master actual characteristics of the Thyristor Controlled Reactance Series Compensation by Adjustable Coupling(TCSCAC),dynamic simulation tests are performed.Using the 500kV power transmission system form Yimin to Fengtun in Northeast Power Grid as the application background,a dynamic simulation device containing TCSCAC is built,and the adjustment and calibration of a multi-functional control system designed for this purpose are conducted.Then the basic characteristic tests such as reactance regulation,power regulation,reactance long-step regulation,transient stability control and power oscillation damping are carried out.The regulation performance curves of these tests and the current and voltage waveforms of series compensator during these tests are recorded.Test results show that the steady state performance of TCSCAC conforms to the results of theoretical analysis,the transient performance of TCSCAC is satisfied and the high compensation can be implemented during the transient stability control process as soon as the fault is cut off.Likewise,TCSCAC can be used to suppress power oscillation while suitable algorithm is adopted.