With technology and economic development, the power of reliability and quality are the new requirement, network system at present there is no work is not reasonable distribution, even in some areas without serious shortage of work, and generally low voltage, current system has no work is acceptable and distributed directly linked to the quality of electricity, and even direct impact of the security and economical network. Reactive power compensation to improve the voltage quality, save energy, reduce the loss of a major means, the electricity sector issues of common concern. No compensation from the work of the basic theory, no compensation for the work of the basic principle, the basic method for compensation. no work of.