含多类型分布式电源的主动配电网分布式三相状态估计

WEI Zhinong

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含多类型分布式电源的主动配电网分布式三相状态估计

更新时间：2025-08-13

- 含多类型分布式电源的主动配电网分布式三相状态估计
- Automation of Electric Power Systems Vol. 39, Issue 9, Pages: 68-74(2015)
- 作者机构：
  
  可再生能源发电技术教育部工程研究中心, 河海大学,江苏省,南京市,210098
- 作者简介：
- 基金信息：
- DOI：
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- Published：2015
- 稿件说明：
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WEI Zhinong. [J]. Automation of electric power systems, 2015, 39(9): 68-74.
DOI：

WEI Zhinong. [J]. Automation of electric power systems, 2015, 39(9): 68-74. DOI：

摘要

提出一种含多类型分布式电源(DG)的主动配电网分布式三相状态估计方法。首先

建立了DG并网的三相模型

将DG并网分为直接并网和经脉宽调制换流器并网两类。选取交流节点的电压、DG的运行状态为状态变量

采用加权最小二乘求解。对于未配置实时量测的DG

提出了一种添加伪量测的可行方案

以提高网络的可观测性。进一步的

为提高主动配电网状态估计的计算效率与数值稳定性

提出一种扩展分区、将外网边界状态量估计值作为本区域伪量测的分布式状态估计方法。最后

实际的算例分析验证了所提方法的有效性

Abstract

A distributed three-phase state estimation method for active distribution network integrating different types of distributed generators (DGs) is proposed. Firstly

the models of three-phase DGs connected to grids are presented

DGs connected to grids are divided into two types: directly or through pulse width modulation (PWM) converters. The states of AC bus voltage

together with the states of DGs

are selected as state variables

which are estimated using weighted least squares (WLS). A feasible way to add pseudo-measurements for unmonitored DGs is introduced so as to enhance the observability. Furthermore

aimed at increasing computational efficiency and numerical stability

a distributed method that extends sub-areas and sets the estimated values of border buses as pseudo-measurements for the area proper is implemented. Finally

test results have verified the effectiveness of the proposal. This work is supported by National Natural Science Foundation of China (No. 51107032

No. 51277052

No. 61104045

No. 51407125).

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