Impedance-based Stability Criterion for the Stable Evaluation of Grid-connected Inverter Systems with Distributed Parameter Lines

Xianghua Peng; Honggeng Yang

doi:10.17775/CSEEJPES.2019.02250

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Impedance-based Stability Criterion for the Stable Evaluation of Grid-connected Inverter Systems with Distributed Parameter Lines

Regular Papers | 更新时间：2026-10-15

- Impedance-based Stability Criterion for the Stable Evaluation of Grid-connected Inverter Systems with Distributed Parameter Lines
- CSEE Journal of Power and Energy Systems Vol. 9, Issue 1, Pages: 145-157(2023)
- 作者机构：
  
  College of Electrical Engineering, Sichuan University,Chengdu,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2019.02250
  CLC：
- Published：01 January 2023
- 稿件说明：
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Xianghua Peng, Honggeng Yang. Impedance-based Stability Criterion for the Stable Evaluation of Grid-connected Inverter Systems with Distributed Parameter Lines[J]. CSEE Journal of Power and Energy Systems, 2023, 9(1): 145-157.
DOI：

Xianghua Peng, Honggeng Yang. Impedance-based Stability Criterion for the Stable Evaluation of Grid-connected Inverter Systems with Distributed Parameter Lines[J]. CSEE Journal of Power and Energy Systems, 2023, 9(1): 145-157. DOI： 10.17775/CSEEJPES.2019.02250.

摘要

Abstract

For a multi-inverter grid-connected system

the stability of the point of common coupling (PCC) voltage is evaluated considering the distribution parameters of the transmission lines. First

the systems on both sides of the PCC are equalized

a small-signal equivalent circuit similar to the “current source-grid” is established

and a mathematical model for the voltage of the PCC is derived. Then

using Euler's formula and Nyquist stability criterion

the PCC voltage stability of the grid-connected system is evaluated by the impedance analysis method under the premise that the single-side excitation is stable. In addition

the grid-connected conditions causing PCC voltage instability are studied. A phase compensation method based on an impedance phase compensation control strategy is introduced. The stability of the grid-connected system is improved by compensating the phase margin at the equivalent impedance crossover-section frequency on both sides of the grid-connected system PCC. Finally

a simulation circuit is built to simulate and analyze the proposed model and phase compensation method. The simulation results verify the accuracy and effectiveness of the theoretical analysis.

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