Impact of AC cables on impedance measurement and oscillation analysis of renewable energy systems and engineering practice

BAI Shibin; GUO Zixuan; WANG Li; SU Bo; LI Tong; LIU Gang; YANG Ziyue

doi:10.3969/j.issn.1672-3643.2026.03.001

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Impact of AC cables on impedance measurement and oscillation analysis of renewable energy systems and engineering practice

更新时间：2026-10-10

- Impact of AC cables on impedance measurement and oscillation analysis of renewable energy systems and engineering practice
- Ningxia Electric Power Issue 3, (2026)
- 作者机构：
  
  1. 国网宁夏电力有限公司,宁夏,银川,750001
  2. 可再生能源并网全国重点实验室(中国电力科学研究院有限公司),北京,100192
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.1672-3643.2026.03.001
  CLC：
- Online First：21 July 2026，
  
  Published：2026
- 稿件说明：
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BAI Shibin, GUO Zixuan, WANG Li, et al. Impact of AC cables on impedance measurement and oscillation analysis of renewable energy systems and engineering practice[J]. Ningxia Electric Power, 2026, (3).
DOI：

BAI Shibin, GUO Zixuan, WANG Li, et al. Impact of AC cables on impedance measurement and oscillation analysis of renewable energy systems and engineering practice[J]. Ningxia Electric Power, 2026, (3). DOI： 10.3969/j.issn.1672-3643.2026.03.001.

摘要

现场阻抗测量是获取新能源机组宽频阻抗

开展阻抗分析

解决振荡问题的关键手段。交流电缆是阻抗测量装置连接被测机组的通道

其对阻抗测量和振荡分析的影响规律不清。因此

本文首先构建了计及电缆参数的新能源汇集单元阻抗解析模型;其次

分析了交流电缆的阻抗主导频带

揭示了电缆参数对测量阻抗相位及阻尼特性的影响;然后

考虑不同电网条件

分析了交流电缆对稳定裕度以及振荡分析的作用规律;最后

给出某光伏电站工程案例

并提出了消除交流电缆影响的阻抗测量方法。

Abstract

On-site impedance measurement is a critical method for obtaining the wideband impedance of renewable energy (RE) units

conducting impedance analysis

and solving oscillation problems. AC cables serve as the connection channel between the impedance measurement device and the unit under test. However

their influence on impedance measurement and oscillation analysis remains unclear. This paper first establishes an analytical impedance model for the RE aggregation unit that incorporates AC cable parameters. It then analyzes the impedance-dominant frequency band of the AC cables

revealing the influence of cable parameters on the phase and damping characteristics of the measured impedance. Next

considering different grid conditions

the influence of AC cables on stability margins and oscillation analysis results is analyzed. Finally

a case study of a photovoltaic (PV) power station is presented

and an impedance measurement method for eliminating the influence of AC cables is proposed.

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