Stability Analysis and Improved Control Strategies for High-Penetration Grid-Connected Distributed Photovoltaic Systems

CHEN Rong; REN Yanhui; ZENG Zichen

doi:10.13882/j.cnki.ncdqh.2312A058

RURAL ELECTRIFICATION > 2025 > (4): 57-62, 38. > DOI: 10.13882/j.cnki.ncdqh.2312A058 CSTR: 32400.14.ncdqh.2312A058

CHEN Rong, REN Yanhui, ZENG Zichen. Stability Analysis and Improved Control Strategies for High-Penetration Grid-Connected Distributed Photovoltaic Systems[J]. RURAL ELECTRIFICATION, 2025, (4): 57-62, 38. DOI: 10.13882/j.cnki.ncdqh.2312A058

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Stability Analysis and Improved Control Strategies for High-Penetration Grid-Connected Distributed Photovoltaic Systems

1.
Chengdu Xingtong Dianyan Electric Power Technology Co., Ltd., Sichuan Chengdu 610041, China
2.
State Grid Gansu Jiuquan Power Supply Company, Gansu Jiuquan 736000, China

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Received Date: December 25, 2023
Revised Date: November 10, 2024
Available Online: April 10, 2025

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Abstract

Abstract

In response to the increasing integration of distributed photovoltaic systems into urban distribution networks, an electromagnetic transient simulation model is developed to study the operational characteristics and power quality of such integration under varying penetration levels. The model also analyzes the safe and stable operation of urban distribution networks. To address the stability issues caused by the weak coupling between the photovoltaic interface converter and the urban distribution network when high-power photovoltaic generation is transmitted over long distances, a mathematical model for stability analysis is established based on the simulation results. This model is used to identify the specific factors affecting system stability, and corresponding improved control strategies for photovoltaic interface converters are proposed.
- distributed photovoltaic,
- grid connection,
- stability,
- control strategy,
- low-frequency oscillation,
- simulation modeling

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