Study Of Controller Used In SVC Based On DSP

The controller used in SVC based on DSP is mainly studied in this paper. In the first instance, a general description of the development of var compensation technique during recent years is given and the working principles and characters of static var compensation technique for unbalanced load are briefly analyzed. After a profound analysis of the theory of symmetrical components, the digital compensation algorithm used in SVC is reduced. Then, after well known the principles and usages of the digital signal chip TMS320F240, with its hardware resources distributed integrated with the characters of SVC reasonably, and the hardware control system based on TMS320F240 is designed, which include the circuits such as voltage and current sampling circuits, pulse triggering circuit, synchronous signal collecting circuit, controller status input and output circuits, keyboard and display circuits. At the same time, according to the characters of the controlling circuit and the TCR circuit the mathematic model is established which can provide the academic gist for the design of PI adjuster and it was designed. Finally, the program of the system is compiled according to the characters of the hardware circuit and compensating algorithm and a prototype is made and tested. The experimental results show that the SVC controller based on DSP not only can synthetically compensate var for unbalanced load, but also have fleet reaction, preferable controlling precision. The controller can be used in the project which is reasonable and advanced. At the end of this paper, the corresponding real waves with var compensation and man machine interface, keyboard and display are provided.