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考虑配电网调压的综合负荷模型

考虑配电网调压的综合负荷模型

Composite Load Model Considering Voltage Regulation of Distribution Network

Composite Load Model Considering Voltage Regulation of Distribution Network

doi:
10.19595/j.cnki.1000-6753.tces.161431
摘要:
分析现有综合负荷模型在机理上的不足,并指出在综合负荷模型中反映电网调压结果的必要性;从总体测辩的角度提出并建立机理性更优的"Π型综合负荷模型",且不增加模型参数个数.模型用实际变压器模拟配电网影响,并用Π型电路等效;根据逆调压原理,提出以稳态时高压母线电压的算术平均值作为变压器电压比,反映配电网调压结果;静态负荷采用ZIP模型并计及无功补偿的作用;辨识算法采用基于递推策略的遗传算法.算例分析表明,所提Π型综合负荷模型在自描述能力、泛化能力等性能上相对于已有的综合负荷模型有一定程度的提高,在反映电网调压、维持负荷母线电压稳定的能力及在不同电压水平下对负荷动态行为的拟合能力等方面具有显著的优势.
Abstract:
After analyzing the shortcomings of the existing composite load model in detail, this paper points out the necessity of reflecting the voltage regulation result of distribution network in composite load model. A composite load model without adding the number of model parameters is proposed and established to reflect the voltage regulation of distribution network based on the measurements. In this model, an actual transformer is used to simulate the effects of distribution network, which is equivalent with a PI type circuit. According to the inverse voltage regulation principle, the voltage average value of the steady high voltage bus is regarded as the actual transformer ratio to represent the result of distribution network voltage regulation. Static load is described as ZIP model that considers the effect of reactive power compensation. The genetic algorithm based on recursive strategy is adopted in the identification algorithm. Example analysis shows that the proposed composite load model is slightly better than the present composite load model on the performance of self-describing and generalization abilities. However, it has significant advantages, including reflecting the voltage regulation ability of power grid, maintaining the load bus voltage stability and the fitting performance to dynamic behavior of load under different voltage.
作者 屈星 [1] 李欣然 [1] 宋军英 [2] 李培强 [1] 曹一家 [1]
Author: Qu Xing[1] Li Xinran[1] Song Junying[2] Li Peiqiang[1] Cao Yijia[1]
作者单位
  1. 湖南大学电气与信息工程学院 长沙 410082
  2. 湖南省电力公司 长沙 410077
期 刊: 电工技术学报 ISTIC EI SCI PKU CSSCI
Journal: Transactions of China Electrotechnical Society
年,卷(期) 2018, 33(4)
分类号 TM715
关键词: 负荷建模 知识脉络 Π型等效 知识脉络 实际变压器 知识脉络 电力系统 知识脉络 综合负荷模型 知识脉络
Keywords: Load modeling Π type equivalent actual transformer power system composite load model
机标分类号
基金项目 国家自然科学基金,中国电力科学研究院资助,湖南省电力公司资助项目
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