电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2013年
9期
60-66
,共7页
电能质量%多属性决策%密切值法%灵敏度分析%综合评估
電能質量%多屬性決策%密切值法%靈敏度分析%綜閤評估
전능질량%다속성결책%밀절치법%령민도분석%종합평고
power quality%multiple attribute decision making%close value method%sensitivity analysis%synthetic evaluation
为了了解电能质量评估结果的稳定性,即评估结果对指标参数变化的敏感性,引入了电能质量评估灵敏度分析的概念和方法.通过定义绝对最优和最劣方案,利用汉明距离计算式代替欧氏距离计算式,对传统密切值法进行了改进.基于改进密切值法,推导了灵敏度分析中两个方案优先序的充要条件,在此基础上推导了电能质量指标属性值和权重值的灵敏度区间充要条件.经算例分析表明,该方法能有效计算指标参数和评估样本的灵敏度,为决策者控制灵敏度高的指标参数及方案决策提供了参考依据.
為瞭瞭解電能質量評估結果的穩定性,即評估結果對指標參數變化的敏感性,引入瞭電能質量評估靈敏度分析的概唸和方法.通過定義絕對最優和最劣方案,利用漢明距離計算式代替歐氏距離計算式,對傳統密切值法進行瞭改進.基于改進密切值法,推導瞭靈敏度分析中兩箇方案優先序的充要條件,在此基礎上推導瞭電能質量指標屬性值和權重值的靈敏度區間充要條件.經算例分析錶明,該方法能有效計算指標參數和評估樣本的靈敏度,為決策者控製靈敏度高的指標參數及方案決策提供瞭參攷依據.
위료료해전능질량평고결과적은정성,즉평고결과대지표삼수변화적민감성,인입료전능질량평고령민도분석적개념화방법.통과정의절대최우화최렬방안,이용한명거리계산식대체구씨거리계산식,대전통밀절치법진행료개진.기우개진밀절치법,추도료령민도분석중량개방안우선서적충요조건,재차기출상추도료전능질량지표속성치화권중치적령민도구간충요조건.경산례분석표명,해방법능유효계산지표삼수화평고양본적령민도,위결책자공제령민도고적지표삼수급방안결책제공료삼고의거.
@@@@For understanding the stableness of power quality evaluation (PQE), i.e., the sensitivity of the evaluation result to the variances of index parameter, this paper introduces the conception and approach of sensitivity analysis for PQE. The traditional close value method (CVM) is modified by defining the absolute optimal alternative and the absolute worst alternative, and replacing the Euclidean distance of close value formula with the Hamming distance. Based on the improved CVM, in the process of sensitivity analysis the paper deduces the necessary and sufficient condition (NSC) about the priority between two alternatives, and then concludes a set of NSCs of the index attribute value and weight of power quality. Finally, the numerical example shows that the sensitivity of index parameters and evaluated alternatives can be effectively calculated through the proposed method, which provides the reference for the decision-maker to control the indexes with high sensitive and the decision-making of alternatives.
