考虑光伏运行状态切换的MGP并网改进控制策略  

An Improved DC Voltage Feedback Control Strategy for MGP Considering Day and Night Switching

作　　者：王岳 黄永章 王哲凡 张馨月 李晨阳 许国瑞 WANG Yue;HUANG Yongzhang;WANG Zhefan;ZHANG Xinyue;LI Chenyang;XU Guorui(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Beijing 102206,China;NCEPU(Yantai)Power Semiconductor Technology Research Institute Co.,Ltd.,Yantai 264000,China)

机构地区：[1]新能源电力系统全国重点实验室(华北电力大学),北京102206 [2]华电(烟台)功率半导体技术研究院有限公司,山东烟台264000

出　　处：《大电机技术》2025年第1期110-116,123,共8页Large Electric Machine and Hydraulic Turbine

基　　金：新能源电力系统全国重点实验室自主研究课题(LAPS202202)。

摘　　要：随着电网中光伏、风电等新能源发电占比的不断提高,电网的稳定性受新能源并网的影响也日益显著。新能源同步机作为一种新的并网技术,可以有效提升高占比新能源电网的运行稳定性。本文首先介绍了光伏采用MGP并网的结构和传统直流电压反馈控制的局限性,分析光照强度变化对光伏-MGP并网系统运行特性的影响;然后结合传统控制的局限性,提出了考虑光伏运行状态切换的改进控制策略,保证光伏经MGP并网在昼夜切换时运行状态的平滑过渡;最后,基于PSCAD/EMTDC搭建了光伏经MGP并网的电磁暂态仿真模型,对本文所提的控制策略进行验证。结果表明,所提控制策略可以避免光伏经MGP并网在昼夜切换时的功率振荡现象,提高光伏经MGP并网全天候运行的稳定性。As the proportion of new energy sources such as photovoltaics and wind power in the power grid continues to increase,the stability of the grid is increasingly affected by the integration of new energy sources.Motor-Generator Pair(MGP),as a new grid-connected technology,can effectively improve the operational stability of a high proportion of new energy power grids.Firstly,this article introduces the structure of the photovoltaic(PV)grid-integration via the MGP and the limitations of traditional DC voltage feedback control,and analyzes the influence of changes in light intensity on the operating characteristics of the PV-MGP grid-connected system.Then,considering the limitations of the traditional control,an improved control strategy is proposed that takes into account the switching of the operating state of PV to ensure a smooth transition of the operating state of PV-MGP system during day-night transitions.Finally,an electromagnetic transient simulation model of the PV grid-integration via an MGP system is built based on PSCAD/EMTDC to verify the proposed control strategy.The results show that the proposed control strategy can avoid power oscillation phenomena of the PV-MGP system during day-night transitions and improve the stability of the system in all day.

关 键 词：电网稳定性 光伏并网 新能源同步机 电压反馈控制 昼夜切换 

分 类 号：TM341[电气工程—电机]