电网技术2025，Vol.49Issue(9)：3577-3588,中插8-中插10,15.DOI:10.13335/j.1000-3673.pst.2024.0644
面向电网电压主动支撑的光伏场站双模式协调控制
Dual-mode Coordinated Control Strategy of Photovoltaic Stations for Active Grid Voltage Support
摘要
Abstract
With the continuous increase of the proportion of photovoltaic(PV)integration into the grid,power systems' dynamic voltage control capability significantly declines.Standards require PV to possess the ability to support voltage actively.However,when PV plants actively support voltage,they may face a severe problem:voltage drops,resulting in excessive PV power generation.Moreover,the intensity of sunlight varies across different units within a PV station,making it difficult to utilize the existing control strategies aimed at uniform station output to fully exploit their support capabilities.This paper proposes a dual-mode active voltage coordination control strategy to address this issue and enhance the PV station's ability to support complex voltage drops.This strategy includes three parts:Firstly,a mode selection module flexibly chooses the control mode based on the drop.Secondly,dual-mode support control is proposed at the station level.Mode 1 is dynamic reactive power control for maximizing active power output under mild voltage drops,and Mode 2 is disturbance observation control for maximum voltage support during deep voltage drops.Subsequently,reactive current coordinated control is proposed at the unit level,differentially allocating reactive current among units to maximize their output.Finally,a case study of PV stations demonstrates that the proposed control strategy offers better active support than traditional controls.关键词
光伏场站/主动电压支撑/电压跌落/双模式控制/无功电流协调Key words
PV station/active voltage support/voltage drop/dual-mode control/coordinated reactive currents分类
信息技术与安全科学引用本文复制引用
张鑫灏,周泓宇,姚伟,赵海宇,阮益闽,肖碧涛,文劲宇..面向电网电压主动支撑的光伏场站双模式协调控制[J].电网技术,2025,49(9):3577-3588,中插8-中插10,15.基金项目
国家重点研发计划项目(2022YFB4202304).Project Supported by the National Key Research and Development Program of China(2022YFB4202304). （2022YFB4202304）
