With The Key Technologies Of The Reactive Power Compensation System

By theory analyzing and using advanced hardware and software technology , this paper detailedly introduces solution ways , the realization of system's key technology and the Var compensation scheme in order to solve the problem of Var compensation in low voltage. To solve the current impulse problem when the non-contactor switch on or cut off the capacitance ,we particularly design the main circuit and the trigger circuit and use the open-off ratio control ways to eliminate impulse current. In order to shun the current resonance ,we use series inductance in main circuit to avoid the harmonic current by theory computation. We add voltage harmonic filter to reduce the harm which voltage harmonic do to power system. In the severe power system unbalance situation, we use the power balance implement principle to do Var compensation, we can make the power factor reach given value and make the three phase load become balance in the same time. Using neural network to predict power system's important parameters which will be compensated and Combining with genetic algorithm ,we get the optimization compensation reactance value and realize the control of balance compensation for power system. The results show the effect of this intelligent control system is good. We make the power factor get optimum control effect by using optimum control theory to a single control appliance. To multi-appliance, first we get the most optimum Var compensation nodes in lines, the we use Dynamic Programming algorithm to the control ways of least energy consume by cooperating the appliance. Based on such study, we give some gives some suggests for the future development.