Triangular Dynamic Equivalent Method for Distribution Network Simulation with High Proportion of Distributed Generators

ZHAO Pengzhen; WANG Chengmin; XIE Ning

doi:10.7500/AEPS20260107001

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Triangular Dynamic Equivalent Method for Distribution Network Simulation with High Proportion of Distributed Generators

Basic Research | 更新时间：2026-10-10

- Triangular Dynamic Equivalent Method for Distribution Network Simulation with High Proportion of Distributed Generators
- Automation of Electric Power Systems Vol. 50, Issue 19, Pages: 171-179(2026)
- 作者机构：
  
  上海交通大学电气工程学院，上海市 200240
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(52407124)
- DOI：10.7500/AEPS20260107001
  CLC：
- Received：07 January 2026，
  
  Revised：2026-04-22，
  
  Online First：16 June 2026，
  
  Published：10 October 2026
- 稿件说明：
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赵鹏臻,王承民,谢宁.适配高占比分布式电源配电网仿真的三角形动态等值方法[J].电力系统自动化,2026,50(19):171-179.

ZHAO Pengzhen,WANG Chengmin,XIE Ning.Triangular Dynamic Equivalent Method for Distribution Network Simulation with High Proportion of Distributed Generators[J].Automation of Electric Power Systems,2026,50(19):171-179.
赵鹏臻,王承民,谢宁.适配高占比分布式电源配电网仿真的三角形动态等值方法[J].电力系统自动化,2026,50(19):171-179. DOI： 10.7500/AEPS20260107001.

ZHAO Pengzhen,WANG Chengmin,XIE Ning.Triangular Dynamic Equivalent Method for Distribution Network Simulation with High Proportion of Distributed Generators[J].Automation of Electric Power Systems,2026,50(19):171-179. DOI： 10.7500/AEPS20260107001.

摘要

高比例分布式电源接入背景下，主动配电网（ADN）动态仿真建模的精度-效率权衡是当前研究热点，现有广泛应用的单节点等值建模方法存在暂稳态仿真误差偏高的固有缺陷。文中首先分析了等值模型仿真的核心误差来源，据此提出基于元件拓扑连接关系的ADN三角形动态等值模型（TBDSEM）。该模型通过三角形连接3个节点，各节点分别接入不同类型的等值元件。然后，分析了ADN动态元件电流变化在公共连接点处的响应特性，提出适配TBDSEM的暂稳态混合等值阻抗计算方法。最后，通过改进IEEE 33节点配电系统、中国某县域配电网接入3机9节点主网的互联系统两个算例完成模型验证。结果表明，在多类型扰动场景下，TBDSEM的计算耗时与传统单节点等值模型处于同一量级，但暂稳态仿真误差降低了10%~50%。

Abstract

Under the background of high-penetration integration of distributed generators

the accuracy-efficiency trade-off in dynamic simulation modeling of active distribution networks (ADNs) is a current research focus. The widely used single-bus equivalent modeling method suffers from an inherent flaw of relatively high simulation errors in transient-steady-state analysis. Firstly

this paper analyzes the core sources of error in equivalent model simulation. Based on this

it proposes a topology-based delta-shape equivalent model (TBDSEM) for ADNs. This model connects three nodes via a triangular configuration

with each bus connected to a different type of equivalent element. Subsequently

this paper analyzes the response characteristics of dynamic element current changes at the point of common coupling (PCC) and proposes a hybrid transient-steady-state equivalent impedance calculation method tailored to the TBDSEM. Finally

model validation is performed using two case studies which are an improved IEEE 33-bus distribution system and a 3-generator 9-bus main grid interconnection system from a county-level distribution network in China. The results indicate that under multi-type disturbance scenarios

the computational time of the TBDSEM is on the same order of magnitude as that of traditional single-bus equivalent models

while transient-steady-state simulation errors are reduced by 10% to 50%.

关键词

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