基于广义短路比的光伏多馈入系统容量优化方法

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基于广义短路比的光伏多馈入系统容量优化方法

更新时间：2025-08-13

- 基于广义短路比的光伏多馈入系统容量优化方法
- Automation of Electric Power Systems Vol. 43, Issue 3, Pages: 147-154(2019)
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- Published：2019
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[J]. Automation of electric power systems, 2019, 43(3): 147-154.
DOI：

[J]. Automation of electric power systems, 2019, 43(3): 147-154. DOI：

摘要

广义短路比可用于描述电力电子多馈入系统小干扰稳定性

基于此指标研究了光伏发电(或场)多点馈入电网的总容量一定时

各点接入容量优化分配的问题

使光伏多馈入系统的小干扰稳定裕度最大。首先

建立了光伏多馈入系统的小干扰稳定分析模型;其次

利用广义短路比关于各馈入点光伏接入容量的灵敏度

提出了光伏多馈入系统的并网点容量优化方法;最后

以光伏三馈入系统为例

验证所提容量优化方法的可行性和有效性。仿真结果表明

合理分配多点接入时光伏的并网容量

能够有效提高系统的广义短路比和小干扰稳定裕度。

Abstract

Generalized short circuit ratio (gSCR) is able to characterize the small signal stability of multi-infeed system with power electronic devices. Based on the gSCR index

the allocation optimization problem of grid-connected capacity of each feeding point is investigated when the total grid-connected capacity of photovoltaic (PV) devices (or fields) is fixed to make the small signal stability margin of multi-infeed PV system maximized.Firstly

the small signal stability analysis model for multi-infeed PV system is established.Secondly

based on the sensitivity of gSCR to grid-connected PV capacity at each feeding point

a capacity optimization method for multi-infeed PV system is proposed. Finally

with three-infeed PV system as an calculation example

the feasibility and effectiveness of the proposed capacity optimization method are verified.The simulation results show that the reasonable distribution of grid-connected PV capacity accessed to multiple points can effectively enhance the gSCR of multi-infeed PV system and increase the small signal stability margin.

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Related Institution

School of Electrical and Electronic Engineering, Shandong University of Technology

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State Grid Economic and Technological Research Institute Co., Ltd.

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