配电变压器低压无功功率自动补偿方法研究  

Research on an Automatic Compensation Method of Low Voltage Reactive Power Of Distribution Transformer

作　　者：柴大鹏[1] 王晓雯[1,2] CHAI Da-peng;WANG Xiao-wen(School of Electricity and Architecture,Shanxi University,Taiyuan Shanxi 030013,China;Department of Electronic Information Engineering,Shanxi University,Shanxi Taiyuan 030013,China)

机构地区：[1]山西大学电力与建筑学院,山西太原030013 [2]山西大学电子信息工程系,山西太原030013

出　　处：《计算机仿真》2021年第5期51-54,198,共5页Computer Simulation

摘　　要：配电网处于电能输送末端,由于无功功率不稳定导致配电变压器利用率低,增加线路损耗。为改善补偿方法的适应性,提出配电变压器低压无功功率自动补偿方法。分析补偿装置出现故障原因,引入分相补偿、运行记录仪等先进技术,重新设计补偿装置。将提升补偿装置功率因数和设备利用率、减少电能损耗为目的,根据负荷程度结合经济成本要求,计算配电变压器无功补偿容量。利用最优覆盖思想将电容容量曲线覆盖的最大面积当作目标函数,构建补偿模型。通过上述模型对负荷数据预处理,计算有功、无功负荷,得出变压器无功损耗,在无功不倒送等条件约束下获取电容容量曲线覆盖面积,实现自动补偿。仿真结果证明,上述方法能够提高各线路关口力率,降低线损,说明该方法可行。Unstable reactive power leads to low utilization of distribution transformers and high line loss. Therefore, an automatic compensation method for low-voltage reactive power of the distribution transformer was proposed to improve the adaptability of the compensation method. The cause of the compensation device failure was analyzed in detail. Phase separation compensation and operation recorder were introduced to redesign the compensation device. Based on the load degree and economic cost requirements, the reactive power compensation capacity of the distribution transformer was calculated for improving the power factor and equipment utilization of the compensation device and reducing the power loss. The compensation model was constructed based on the maximum area covered by the capacitance curve. According to the pre-processing of the load data, the active and reactive loads were calculated to obtain the reactive power loss of the transformer. Based on the constraint of reactive power non-reverse transmission, the coverage area of the capacitance curve was obtained, thus realizing automatic compensation. The simulation results show that the method can improve the gate force rate of each line and reduce the line loss, indicating that the method’s feasibility is excellent.

关 键 词：配电变压器 无功功率 自动补偿 最优覆盖思想 负荷程度 

分 类 号：TP183[自动化与计算机技术—控制理论与控制工程]