五区图变电站电压无功控制原理研究

五区图控制理论是一种控制对象与传统九区图完全不同的电压无功综合控制（VQC）原理。在五区图控制原理的基础上明确提出了VQC应面向VQC装置实际操作动作的控制思想；并从与常规解析方法不同的角度，新提出了一种根据操作动作矢量直接确定五区图动作边界的方法；对控制模型、盲区控制进行了讨论；给出了软件实现框图。分析表明基于实际操作动作的五区图原理，控制精度高、控制效果好。

Study on five-zone theory of substation VQC

Five-zone theory is of voltage and reactive power control(VQC), different from the classic nine-zone theory in control target. The idea is presented that VQC should be oriented to actual operation. It determines the boundary of the five-zone directly according to operating vector,different from the analytic method. Some respects such as control model,blind area control are discussed and the program flowchart is given. The analytical result demonstrates that this theory has higher precision and better effect.