Along with the increase of high power nonlinear load, the power grid of reactive power and harmonic pollution is rising trend, the lack of the bus voltage reactive power regulation means, along with the change of operation mode, reduce the voltage qualification rate of rise in power grid line loss. Lack of reactive power compensation capacity and is equipped with unreasonable problems in the operation of the power grid construction in China and a problem, especially the adjustable reactive power capacity is insufficient, quick response less reactive power regulating equipment.

Over the past 20 years, the global occurrence of large area blackout accident attaches great importance to all countries. All kinds of large area blackout accident reminder that power grid operation should have sufficient reactive power reserve capacity, reactive power can not rely on long distance transmission, in the electricity market environment, must develop a unified rules and regulations, and to encourage independent power suppliers and operators from the Angle of maintenance of the whole system security, provide sufficient dynamic reactive power reserve.

To rely on scientific and technological progress to improve power quality and governance. The expert analysis thinks, adopt static synchronous reactive power compensation device is one of the effective measures to solve these problems. It enhances the stability of power grid and improve the power quality of distribution  system and other aspects have played an important role, is one of the countries to adopt the most advanced practical technologies, is the smart grid as voltage regulation and reactive power compensation in the key node equipment, also as a key equipment for power system of the strategic defensive.

To improve the relevant enterprises to improve power quality and the necessity of management awareness. At home because of the lack of corresponding enforcing standards, weak awareness of power quality problems of domestic enterprises, are often the power quality affected the normal production or after an accident realized the management of power quality is required. With economic and social development, people"s understanding of power quality are also in development, the requirement of power quality in different periods is not the same.

With the development of the power grid, the system stability problem also more and more important. Static synchronous reactive compensation technology is a kind of economic and effective measures to improve voltage stability of grid is to promote the safe and stable, and the objective demand of strategic defensive, it can be used to improve the transmission ability of China to send engineering and by the end of the voltage stability of the system. Hub for substations or power on the terminal to provide dynamic reactive power support, thus improve the voltage stability. Improve the comprehensive index of distribution network power quality, improve the system of dynamic and static quality, makes the new renewable energy power generation of large scale possible.