基于惯性同步的构网型光伏并网系统次同步振荡特性分析

高本锋; 刘王锋; 丁雨晴; 吴林林; 孙大卫; 邓鹏程

doi:10.19912/j.0254-0096.tynxb.2023-0657

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太阳能学报 ›› 2024, Vol. 45 ›› Issue (8) : 398-406. DOI: 10.19912/j.0254-0096.tynxb.2023-0657

基于惯性同步的构网型光伏并网系统次同步振荡特性分析

高本锋¹, 刘王锋¹, 丁雨晴¹, 吴林林², 孙大卫², 邓鹏程¹

作者信息 +

ANALYSIS OF SUB-SYNCHRONOUS OSCILLATION CHARACTERISTICS OF GRID-FORMING PHOTOVOLTAIC SYSTEM BASED ON INERTIAL SYNCHRONIZATION

Gao Benfeng¹, Liu Wangfeng¹, Ding Yuqing¹, Wu Linlin², Sun Dawei², Deng Pengcheng¹

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文章历史 +

摘要

针对目前适用于单级式构网光伏发电并网系统的惯性同步控制策略及其次同步振荡特性鲜有研究这一问题,该文将惯性同步控制应用于构网型光伏发电系统,并建立其状态空间模型,利用特征值分析法确定系统振荡模式,最后利用参与因子和特征值根轨迹分析系统相关参数对振荡模式的影响。研究结果表明,构网型光伏并网系统具有更好的弱电网适应性,但在强电网下,存在直流电容和惯性同步环节共同主导的SSO模式,可通过增大直流电容和电压内环比例系数或减小电压内环积分系数来增大系统阻尼,提高系统稳定性。基于PSCAD/EMTDC时域仿真平台,验证了理论分析的正确性。

Abstract

Aiming at the problem that the inertial synchronous control strategy and its sub-synchronous oscillation characteristics are rarely studied for single-stage grid-forming photovoltaic power generation systems, this paper applies inertial synchronous control to grid-forming photovoltaic power generation systems, establishes its state-space model, and uses eigenvalue analysis to determine the oscillation mode of the system. Finally, the influence of system parameters on the oscillation mode is analyzed by using the participation factor and eigenvalue root locus. The research results show that grid-forming photovoltaic system has better adaptability to weak power grid, but in strong power network, there is SSO mode dominated by DC capacitance and inertia synchronization, which can increase the system damping and improve the system stability by increasing the DC capacitance and voltage inner loop proportional coefficient or reducing the voltage inner loop integral coefficient. Based on the PSCAD/EMTDC time domain simulation platform, the correctness of the theoretical analysis is verified.

导出引用

高本锋, 刘王锋, 丁雨晴, 吴林林, 孙大卫, 邓鹏程. 基于惯性同步的构网型光伏并网系统次同步振荡特性分析[J]. 太阳能学报. 2024, 45(8): 398-406 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0657

Gao Benfeng, Liu Wangfeng, Ding Yuqing, Wu Linlin, Sun Dawei, Deng Pengcheng. ANALYSIS OF SUB-SYNCHRONOUS OSCILLATION CHARACTERISTICS OF GRID-FORMING PHOTOVOLTAIC SYSTEM BASED ON INERTIAL SYNCHRONIZATION[J]. Acta Energiae Solaris Sinica. 2024, 45(8): 398-406 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0657

中图分类号： TM712

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