地区电网无功电压优化系统的研究与设计

Research and Design on Reactive Voltage Optimization System of Regional Power Grid

不少地区电网变电站的电压无功控制设备为九区图方式,即将电压的上下限值和功率因数划分为九个区域,从而对有载调压变压器分接头和电容器组进行分组调控。此种电压无功控制设备在提高变电站二次母线电压合格率方面的优势是比较显著的,但是其缺陷也同样比较突出,如地区电网故障时,电压无功控制设备采用的稳定运行策略将可能导致故障范围的进一步扩大;由于无法对地区电网的运行工况进行全面掌握,因此电压无功控制设备只能在单独变电站内进行电压无功综合调控等。随着地区电网规模和容量的不断扩大,电压无功控制设备已经难以满足地区电网平稳和经济运行的要求,为此地区电网无功电压优化系统的开发和应用就成为需要我们深入研究的课题。

Reactive power control equipments of many transformer substation are ＂nine-zone diagram＂ control method, and improving the passing rate of the secondary bus voltage substation effect is very significant. However, the traditional substation Vol/Var Coordinated Control （VQC） based nine-zone diagram, has some disadvantages such as oscillatory putting in and out of capacitances, frequent adjusting of OLTC, etc. With size and capacity of regional power grid to expand, it is difficult to meet smooth and economical operation of regional power grid by using reactive power control equipment, so reactive voltage optimization system of regional power grid will be researched and designed in this paper.