CAJ | 학술논문

电网安全指标不断扩充，而调度员驾驭电网的能力极其有限，以一种综合性指标表征电网安全显得尤为必要。文中提出一种基于层次分析法和变权重机制的电网安全指标计算及展示方法。以多项电网安全基础指标为例，计及指标量纲、指标结构和设备重要性差异3个方面设计了计算公式，并统一以“1”作为安全限值。结合层次分析法和3种权重修正机制，得到各指标权重并聚合电网安全综合指标。在此基础上，设计了电网运行状态安全等级划分方法以及展示方法。对某省级电网测试结果表明，所述方法计算得到的电网安全指标可以实时反映电网安全状态变化，准确捕捉电网安全故障，是适用于新一代调度系统的电网安全指标计算方法。
전망안전지표불단확충，이조도원가어전망적능력겁기유한，이일충종합성지표표정전망안전현득우위필요。문중제출일충기우층차분석법화변권중궤제적전망안전지표계산급전시방법。이다항전망안전기출지표위례，계급지표량강、지표결구화설비중요성차이3개방면설계료계산공식，병통일이“1”작위안전한치。결합층차분석법화3충권중수정궤제，득도각지표권중병취합전망안전종합지표。재차기출상，설계료전망운행상태안전등급화분방법이급전시방법。대모성급전망측시결과표명，소술방법계산득도적전망안전지표가이실시반영전망안전상태변화，준학포착전망안전고장，시괄용우신일대조도계통적전망안전지표계산방법。
With the increase of power grid security indexes,the dispatcher”s ability to harness the grid is extremely limited.It is very necessary to use a comprehensive index to characterize the security states of the power grid.Thus,a method of power grid security index calculation and display based on the analytic hierarchy process (AHP) and variable weight mechanism is proposed.Based on several power grid security basic indexes,a calculating method considering dimension consistency,index structure rationality and electrical device differentiation,is proposed,and “1" of all the indexes is unified as the gap between safety and unsafety.The analytic hierarchy process and three mechanisms of weighting correction are used to determine index weights and aggregated into the comprehensive index.Besides,a method for dividing the operation security levels is presented and the display methods of power grid security index are also given.Numerical simulations are conducted in a certain power grid,the results showing that the proposed index of power system security is able to reflect the real-time statement of grid security and identify the fault with the system.Therefore,it is applicable to the modern dispatching system for watching power system security.