500/220 kV电磁环网解合环方式评价方法研究

提出了一种新的500/220 kV电磁环网运行方式评价方法,该方法从电网运行可靠性和经济性出发,确定了以母线短路电流水平、线路负载率、变压器负载率、电网静态安全性、电网暂态稳定性、网损作为评价电磁环网不同解合环方式优劣的指标,并基于电网实际运行中对各指标的期望曲线,建立了考虑阈值的运行指标评价公式,对于各运行指标的权重参数,采用了一种新的群决策理论方法进行确定.根据计算实例对比,表明了该电磁环网运行评价指标方法是实用有效的.

Evaluation on Open/closed Loop Operation Modes of 500/220 kV Electromagnetic Loop Network

In this paper, a new method is proposed to evaluate the operation modes of 500/220 kV electromagnetic loop network. From the views of reliability and economy of power grid operation, the bus-bar short-circuit current level, the line load rate, the transformer load rate, the power grid static security, the power grid transient stability and the power grid loss are selected as evaluation indexes. Based on the anticipant curves of each index during actual operation of power grid, evaluation formula combined with threshold is established. To acquire the weight coefficient of each operation index, a new group decision-making theory is adopted. Comparisons of calculation results of an actual example shows that the proposed method is practical and effective.