CAJ | 학술논문

根据配网侧负荷特点,构建含风力发电机的综合负荷数学模型.以实测 PMU 数据为基础,利用总体测辨法进行模型参数辨识.将负荷节点输入电压和负荷模型参数代入数学模型,通过改进 Euler 法求解模型的状态方程,得出负荷节点电流,将其与实测电流误差加权最小作为目标函数,采用遗传算法辨识出负荷模型的参数.以华北电网某线路实测 PMU 数据为依据,辨识出考虑风电综合负荷的模型参数.辨识结果体现了负荷中以双馈异步发电机为主体的特征,与负荷特点相吻合,由此说明了辨识方法的有效性与辨识结果的合理性.
근거배망측부하특점,구건함풍력발전궤적종합부하수학모형.이실측 PMU 수거위기출,이용총체측변법진행모형삼수변식.장부하절점수입전압화부하모형삼수대입수학모형,통과개진 Euler 법구해모형적상태방정,득출부하절점전류,장기여실측전류오차가권최소작위목표함수,채용유전산법변식출부하모형적삼수.이화북전망모선로실측 PMU 수거위의거,변식출고필풍전종합부하적모형삼수.변식결과체현료부하중이쌍궤이보발전궤위주체적특정,여부하특점상문합,유차설명료변식방법적유효성여변식결과적합이성.
The comprehensive load model with wind power generation involved is established based on the load model of distribution network. The overall measuring identification method is then used for parameter identification with measured node voltages. Substituting the node voltage into mathematical model of load, the corresponding current can be calculated through solving its state equation with improved Euler method. The weighted error between measured and calculated currents is selected as the objective function, which can be solved with the genetic algorithm to determine the parameters of the load model. Given measured PMU data from north China power grid, parameters of comprehensive load model are identified with the method proposed above considering wind power generation. The identified results reflect that the main part of load are double fed induction generators for wind power generation, which is in good agreement with the characteristic of load and verifies both the validity of identification method and rationality of identification results.