一种基于实时负荷的变压器电抗优化控制方法  

Optimal Control Method of Transformer Reactance Based on Real Time Load

作　　者：许恺 陈骥群 王毅 XU Kai;CHEN Jiqun;WANG Yi(Baoding Power Supply Branch of State Grid Hebei Electric Power Co.,Ltd.,Baoding,Hebei 071051,China;Key Laboratory of New Energy Power System,North China Electrical Power University,Baoding,Hebei 071003,China)

机构地区：[1]国网保定供电公司,河北保定071051 [2]华北电力大学(保定)新能源电力系统国家重点实验室,河北保定071003

出　　处：《东北电力技术》2024年第4期1-5,共5页Northeast Electric Power Technology

基　　金：国家自然科学基金项目(52077079)。

摘　　要：为保证变电站内中低压母线的短路电流水平,需要选择合理的变压器电抗参数,防止过大的三相短路电流对相关设备选型造成困难。而限制电网短路电流水平增加变压器阻抗也将增加变压器损耗,不利于电网的经济运行。针对上述问题,在综合考虑电网运行可靠性和经济性的基础上,提出一种基于实时负荷的变压器电抗优选方法。该方法根据变压器实时负荷,以三相短路电流、电压调整率及无功损耗为约束条件,选出变压器当前负荷下电抗的最优值,并与变压器实际电抗值比较得到电抗偏差值,通过可控串补技术进行电感电容的补偿,使变压器单元整体电抗值为最优值。仿真结果表明,所提方法可有效协调用户对供电可靠性与经济性的要求。In order to ensure the short-circuit current level of medium and low voltage bus bars in substation,it is necessary to select reasonable transformer reactance parameters to prevent the selection of related equipment caused by excessive three-phase short-circuit current.However,limiting the short-circuit current level of the power grid to increase the transformer impedance will also increase the transformer loss,which is not conducive to the economic operation of the power grid.According to the above problems,on the basis of comprehensive consideration of the operation reliability and economy of power grid,it proposes a real time load based transformer reactance optimization method.According to the real time load of the transformer,this method taking the three-phase short circuit current,voltage regulation rate,and reactive power loss as constraints to optimize the optimal value of the reactance of the transformer under the current load,and comparing it with the actual reactance value of the transformer to obtain the reactance deviation value.Through the controllable series compensation technology,the inductance and capacitance are compensated,so that the overall reactance value of the transformer unit is the optimal value.Simulation results show that the proposed method can coordinate user requirements for power supply reliability and economy.

关 键 词：实时负荷 变压器电抗 可控串补 运行可靠性 运行经济性 

分 类 号：TM47[电气工程—电器]