A New Method Of Reactive Power Compensation Based On Magnetic-Valve Controlled Reactor

Since there are many inductive loads in large industries, the power system needs toprovide a lot of reactive power. In order to reduce power loss and improve the quality ofpower supply, it is necessary to compensate reactive power. In recent years, with the rapiddevelopment of the wind power and solar power, reactive power compensation shows somenew features. Based on the advantages and disadvantages of the traditional reactive powercompensation, this paper proposes a new method of reactive power compensation, which isbased on magnetic switches.First, this paper gives out the theoretical analysis of the magnetic switch, and then toachieve the purpose of reactive power compensation, switching capacitors using magneticswitches. Simulation proves that the system is stable during the transient process. Whencompared with reactive power compensator on magnetic-valve controllable reactor andthyristor switched capacitor, the new method is superior in economic and security. Duringtransient process, ferroresonance will occur. With the causes of ferromagnetic resonance,there’re two methods suggested to eliminate the ferroresonance. Meanwhile, the paperdescribes the detection method of the system signal, the zero-crossing switching thyristortechnology, power factor controller and the damping resistor control using the PLCsequence.At last, a lot of simulation and prototype testing have been done for steady andtransient state. test result is consistent with the theoretical analysis. Switching the dampingresistance properly can suppress ferroresonance, and the capacitor switching can be asmooth transition.All prove that the new method of reactive power compensation isfeasible.