基于模糊决策树的变电站电压无功控制方法研究

变电研制的电压无功控制是保证电能质量和电力系统安全可靠运行的重要措施。本文分析当前电压无功控制方法存在的不足，把模糊决策树应用到这一领域，提出基于模糊决策树的变电站电压无功控制方法。模糊决策树融合了模糊理论和决策树的优点，不仅能很好地解决电压越限的模糊边界问题，而且能依据调压控制的限制条件优化原则和设备保护闭锁等信息进行综合决策，以实现电容器和变压器分接头在变电站各种运行状态下的最佳配全。用于某110kV变电站的实验表明，本方法能提高电压质量，减少设备调节次数，具有良好的控制性能。

Study of voltage and reactive power control approach based on fuzzy decision trees for substations

The voltage and reactive power control of substation is an important approach that ensures the voltage quality and power system running in security and reliability.This paper analyzes the shortage of the methods at present,and proposes a new method of the voltage and reactive power control,which is based on the fuzzy decision trees(FDT).The proposed method solves the fuzzy boundary problem of voltage and reactive power control and overcomes the shortage of the fixed boundary control methods.In addition,with the synthetically decision-making capability of the fuzzy decision trees,it combines the limited conditions and optimized standards in voltage control and the protective and locked information in substation,and realizes the best coordination of capacitors(reactors)and tap change of transformer in various running status of substation.The experimental result for110kV substation shows that the proposed method improves greatly the performance of voltage and reactive power control and advances the voltage quality,which has the well application foreground.