基于功率空间的分时段负荷模型参数在线修正

On-Line Revising Algorithm for Load Model Parameters of Substation in Different Daily Periods Based on the Measured Active Power

提出对变电站负荷模型参数进行分时段修正的方法。首先通过定性分析不同类型特征参数提取综合负荷特性的能力,指出为分时段修正模型参数,可采用功率空间作为描述负荷曲线的特征参数;其次以典型的变电站聚类中心和行业综合日负荷曲线为基础,采用超标加权法求取一天内不同日负荷时段各特征参数权值;然后建立变电站实测日负荷数据对应的各日负荷时段单因素评判集,结合相应时段特征参数权值,采用模糊综合评判方法得到该变电站在不同时段所对应的实时行业负荷构成比例;最后结合其他途径获得的行业典型模型参数实现变电站综合负荷模型参数的分时段修正。论文以综合负荷的动态负荷比例为例,将分段修正所得结果与基于全天日负荷曲线及统计综合法所得结果对比分析,表明本文方法的合理性与有效性。

This paper proposes an algorithm for the revising of the parameters of load model of substation in different periods during a day.Firstly the ability in extracting load characteristic of different kinds of feature parameters are analyzed through qualitative analysis and measured active power is chosen as the characteristic parameter when takes modifying model parameters in different daily periods into consideration.Secondly,on the basis of the clustering centers of substations and synthesis daily load profiles of typical industries,the weight of every parameter in different daily periods is calculated via super weighting method.Then the real time synthesis load proportion of classical industries is computed based on the single element judgement sets in different daily periods and the weight of the parameters which corresponds to the same period by means of fuzzy comprehensive judgement.At last,the load model parameters of substation in different daily periods is worked out through combining the real time proportions and typical industrial parameters which are derived by other methods.The algorithm proposed by this paper is compared with the method which is based on the whole daily load profile and with the traditional component-based approach method respectively,the results show that it is rational and effective.