Study On The Modularized Active Reactive Power Compensation Equipment

Advanced Static Var Generator (ASVG), a substantial component in Flexible AC Transmission System (FACTS), has been coming use. The circuit topologies compensating the large capacity reactive power are compared, and the modularized circuit topology based on CANBUS is choosed as the studied object of this paper. Some ASVG's problems founded in application are deeply researched.In the unbalanced power system, the simulations of the ASVG using the current controlling method in abc axis model and the ASVG using the current controlling method in dq axis model are done, and the simulation results show that the former controlling method is superior to the latter, and the reason is given.Moreover, this paper applies the Space Vector Pulse Width Modulation (SVPWM) to ASVG tracking specified voltage vector by SVPWM to control the current of ASVG under the balanced power system. This method makes fully use of DC voltage and optimized the switching frequency, which is examined by simulating.The theory of AC regulator in carrier-servo controlling system is quoted, which does achieve zero steady-state error when AC reference is given.ASVG using the direct current controlling method in abc axis model with AC PI adjuster has excellent performance and high controlling accuracy.The reactive current detecting hardware circuit and current tracking controlling hardware circuit based on TMS320LF2407ADSP are designed carefully. The communication with CANBUS between modules is realized, and the main circuits are analyzed and design in detail. At last the experiment of checking reactive current is dong, and the result of checking reactive power is gained accurately.