无功优化是电力系统电压稳定与经济运行的核心问题，也是提高电力系统电压质量的重要措施。
Var optimization is core problem of voltage stability and economic operation of electric power system, also important measure to improve voltage quality.
电力系统的无功补偿与无功平衡是保证电压质量的基本条件。
Reactive compensation and reactive equilibrium of electrical system are the basic conditions for guaranteeing voltage quality.
在电力系统中，电压问题不仅是一个供电质量问题，而且是关系到系统安全和经济运行的重要问题。
In the power system, the voltage problem is not only a power supply quality problem, and is related to the system safety and economical operation.
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