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考虑配电网结构的电力系统综合负荷建模
作者:
作者单位:

1.南华大学电气工程学院,湖南省衡阳市 421001;2.湖南大学电气与信息工程学院,湖南省长沙市 410082

作者简介:

通讯作者:

基金项目:

湖南省教育厅资助项目(18C0429,18C0471)。


Synthesis Load Modeling of Power System Considering Distribution Network Structure
Author:
Affiliation:

1.School of Electrical Engineering, University of South China, Hengyang 421001, China;2.School of Electrical and Information Engineering, Hunan University, Changsha 410082, China

Fund Project:

This work is supported by the Education Department of Hunan Province (No.18C0429,No.18C0471).

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    摘要:

    电力系统综合负荷模型结构是负荷建模领域中最为基础和关键的问题之一。在电力系统仿真计算中,负荷模型直接与变电站高压母线连接,而负荷一般通过高压配电网接入电网,这在现有的综合负荷模型未能体现。文中提出了一种适用于负荷建模的高压配电网建模方法,基于不复杂化综合负荷模型,将高压配电网等效模型集成至负荷模型中,从而构建了一种考虑配电网结构的综合负荷模型。通过仿真分析可知,所提综合负荷模型在模型描述能力、电压适应范围等方面相较于已有的综合负荷模型得到了显著的提高,其2种结构形式在模型综合性能方面相近,而在参数稳定性和维持负荷电压稳定方面有不显著的差异。

    Abstract:

    Synthesis load model of power system is one of the most basic and key issues in the field of load modeling. In power system simulation calculations, the load model is directly connected to the high-voltage bus of substation. However, the loads are actually connected to power gird through the high-voltage distribution network, and the existing synthesis load models are not able to reflect these load situations. In this paper, a method of modeling high-voltage distribution network available to load modeling is proposed. By integrating the equivalent model of high-voltage distribution network into the load model, an synthesis load model considering the distribution network structure is developed. The simulation analysis shows that the proposed synthesis load model has a significant improvement in model description ability, adaptation ranges of voltage and other aspects compared with the existing synthesis load models. The two structural forms are similar in the comprehensive performances,but have several slight differences in the parameter stability and the maintenance of load bus voltage.

    表 3 Table 3
    表 4 Table 4
    表 2 Table 2
    图1 高压配电网等效模型Fig.1 Equivalent model of high-voltage distribution network
    图2 PICLM等值电路Fig.2 Equivalent circuit of PICLM
    图3 电力系统示意图Fig.3 Schematic diagram of power system
    图4 样本2参数对样本1的拟合误差Fig.4 The fitting error to sample 1 with parameters of sample 2
    图5 样本2参数对样本3的拟合误差Fig.5 The fitting error to sample 3 with parameters of sample 2
    图 No.2的实测与模型响应 Fig. A1 Measured and model response of No.2Fig.
    图 No.2模型参数对No.1的响应曲线Fig. A 2 Interpolation response of modelsFig.
    图 No.2模型参数对No.3的响应曲线 Fig.A 3 Extrapolation response of modelsFig.
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引用本文

屈星,李欣然.考虑配电网结构的电力系统综合负荷建模[J/OL].电力系统自动化,http://doi.org/10.7500/AEPS20190812005.
QU Xing,LI Xinran.Synthesis Load Modeling of Power System Considering Distribution Network Structure[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20190812005.

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  • 收稿日期:2019-08-12
  • 最后修改日期:2020-04-12
  • 录用日期:2020-02-25
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