Research On Static Reactive Power Compensator Of The TSC

The reactive power has a great effect on power grid. Voltage's dropping and instability are all due to it, what's more, it increases the line loss and wastage of power. Therefore it is a significant aspect of power systems research to compensate reactive power and reduce the reactive current on transmission line to keep the network reactive power balance. The traditional reactive power compensation technology becomes more and more unsatisfied with the needs of the present society along with the increasing demands of power equipment , more complicate network and higher requirement standard of reactive power compensation.In this Paper, reactive power compensation are firstly introduced including the purpose and signification of the research, the principle of modern reactive compensation technology and comparison of different compensation equipment. the author, in the chapter 2, focuses on the principle and switched time of the Thyristor switched capacitor which(TSC) is a static var compensator based on the theory of the instantaneous reactive power with no harmonic generation, flexibly control, low loss and reasonable cost. The design of TSC system is also given in the chapter 2, including cacentralized compensation, unequal capacity grouping and Y connection. The voltage-reactive power multiplexed control mode avoids the Switch oscillation problem due to single criterion of switching.Modularizing is adopted in the TSC controlling system including data acquisition module, signal preprocessing module, Man-machine interface module and capacitor switching module. The MCU STC89C52 is choose as the controller and AD536A is set to reduce computation of data from the grid. Besides, both the hardware and software design are given in the paper.At last, the author use a simulation by MATLAB to Verify the whole system, and come to a supportable conclusion.