考虑通信延时的海上风电系统主动频率支撑控制
Primary frequency control considering communication delay for grid-connected offshore wind power systems
潘学萍 1徐祈杰 1徐涛 1郭金鹏 1孙晓荣 1陈玉全 1李强 2梁伟1
作者信息
- 1. School of Electrical and Power Engineering,Hohai University,Nanjing 211100,P.R.China
- 2. Electric Power Research Institute of State Grid Jiangsu Electric Power Co.Ltd,Nanjing 211103,P.R.China
- 折叠
摘要
深远海风电场距离陆上集控中心较远,集控中心与海上风机通信延时使得一次调频量测信号存在时滞,导致风电机组一次调频效果欠佳,甚至出现系统频率失稳问题.为此,本文针对海上风电并网系统,建立了含通信延时的频率响应模型,采用Pade近似模拟延时环节,推导了风电并网系统线性化模型,研究不同延时下系统的频率稳定性.分析风电装机占比、调频参数对系统频率稳定的影响,进一步采用Smith延时补偿控制策略,减小通信延时对系统频率稳定的影响.最后基于MATLAB/Simulink平台建立海上风电并网系统,仿真验证了所提延时补偿控制策略的可行性和鲁棒性.
Abstract
Offshore wind farms are becoming increasingly distant from onshore centralized control centers,and the communication delays between them inevitably introduce time delays in the measurement signal of the primary frequency control.This causes a deterioration in the performance of the primary frequency control and,in some cases,may even result in frequency instability within the power system.Therefore,a frequency response model that incorporates communication delays was established for power systems that integrate offshore wind power.The Padé approximation was used to model the time delays,and a linearized frequency response model of the power system was derived to investigate the frequency stability under different time delays.The influences of the wind power proportion and frequency control parameters on the system frequency stability were explored.In addition,a Smith delay compensation control strategy was devised to mitigate the effects of communication delays on the system frequency dynamics.Finally,a power system incorporating offshore wind power was constructed using the MATLAB/Simulink platform.The simulation results demonstrate the effectiveness and robustness of the proposed delay compensation control strategy.
关键词
海上风电/一次调频/时滞/Pade近似/延时补偿控制Key words
Offshore wind power/Primary frequency control/Time delay/Padé approximation/Time-delay compensation control引用本文复制引用
基金项目
National Natural Science Foundation of China(52077061)
Fundamental Research Funds for the Central Universities(B240201121)
出版年
2024
国家科技期刊平台
NSTL
万方数据