基于负载角调节的光伏电站集中同步控制策略  

Centralized Synchronization Control Strategy for Photovoltaic Power Plants Based on Load Angle Adjustment

作　　者：杜粉琼 Du Fen Qiong(Guodian Power Development Co.,Ltd.Xuanwei Branch,Xuanwei 655400,China)

机构地区：[1]国电电力发展股份有限公司宣威分公司,云南宣威655400

出　　处：《云南电力技术》2023年第4期32-36,共5页Yunnan Electric Power

摘　　要：随着可再生能源的发展,光伏发电厂正在以指数级的速度增长。与此同时,光伏电站的稳定性问题成为一个重点关注的问题。输电和配电系统对光伏电站提出了更高的要求,为电网提供稳定的频率和电压。为了满足这一要求,现有的研究提出了诸如同步功率控制器的控制策略。然而,大多数这些控制策略是在本地集成嵌入每个逆变器的附加固件中,在其连接点提供所需的控制调节支持。对于光伏发电厂,固有的同步特性是在与电网的连接点处,而该连接点并不总是每个功率逆变器的连接点。由于多个功率逆变器可以在特定节点提供电压和频率调节支持,因此集中协调多个同步运行的功率变换器成为研究重点。本文提出了一种基于负载角调节的集中控制策略,该控制策略模拟聚合同步控制,将光伏发电厂调节为稳定上网系统。仿真和实验结果验证了本文提出的控制策略的有效性。With the development of renewable energy,photovoltaic power plants are growing exponentially.At the same time,the stability of photovoltaic power stations has become a key concern.Transmission and distribution systems have higher requirements for photovoltaic power stations to provide stable frequency and voltage for the grid.To meet this requirement,existing research has proposed control strategies such as synchronous power controllers.However,most of these control strategies are locally integrated into additional firmware embedded in each inverter,providing the required control and regulation support at its connection point.For photovoltaic power plants,the inherent synchronization characteristic is at the connection point to the grid,which is not always the connection point for each power inverter.Because multiple power inverters can provide voltage and frequency regulation support at specific nodes,centralized coordination of multiple synchronous power converters has become a research focus.This paper proposes a centralized control strategy based on load angle adjustment,which simulates aggregate synchronous control and adjusts photovoltaic power plants to stable grid systems.Simulation and experimental results verify the effectiveness of the control strategy proposed in this paper.

关 键 词：电网稳定性 光伏发电厂 同步功率控制 

分 类 号：TM74[电气工程—电力系统及自动化]