Design And Simulation Technology Research Of TCR-FC Static Var Compensator

Electric arc furnaces, welding and other impact loads are connected to the grid, it will seriously affect the quality of power supply, reducing power grid capacity. Therefore,,it is necessary to do research on real-time monitoring the grid, dynamic compensating reactive, enhancing grid stability and improving power supply capacity.Because of the split-phase adjustment, continuous, low noise etc, TCR-FC static var compensator occupies a dominant market position. But there is appearance of high bus voltage, suddenly increasing of reactor load and local overvoltage etc. in these device's runing. And then affect the stable operation seriously. In response to these problems, the paper proposes controling strategy of feedforward PI controlling that based compensation algorithm of C.P.Steinmetz and simulation modeling for each component of TCR-FC SVC. Finally, the paper simulats controlling systems of SVC. This major work to do as follows:(1) First, research characteristic of compensation and voltage, design a cheme in engineering of SVC for eaf load based monitoring and empirical data.(2) Design structure of TCR-FC static var compensator and comput the compensation capacity type of some parts and its parameters.(3) Research working principle of TCR, build simulation models of thyristor trigger link, realize the simulation research that thyristor control reactor.(4) design feedforward PI controller, and design controlling parameters of ratio and Integral using critical ratio method based C.P.Steinmetz theory.(5) Finally, the paper simulats controlling systems of SVC. The results show that controling strategy of the paper has many advantages of rapid response, strong balance and implement in engineering easily.Simulation results show that SVC of TCR-FC controller based on C.P.Steinmetz theory has the following advantages:design easily, fast response; low error rate of thyristor trigger; strong balance.