海上风电场电网有功调度发电量提升技术

Active Dispatching Power Generation Enhancement Technology in Offshore Wind Farm Power Grid

随着国内海上风电装机迅速发展,海上风电在电力能源系统的占比越来越大,与此同时不断提高风功率预测、高低穿、一次调频等技术,提高了海上风电风力发电机组的可调节性,进而提高了电力系统稳定性。但风电的应用依然存在间歇性、波动性、处于电网末端等问题,加之目前海上风电储能技术尚未完善,海上风电场就必须接受各个地方电网有功负荷调度,避免引起电网线路功率波动,影响电网及其线路的稳定性。风电场处于电网有功调度期间,尽可能提高风电场站内发电量。文章从能量管理系统(Energy Management System,EMS)系统有功控制现有策略有功欠发及线路损耗等现象出发,优化EMS系统风电场有功控制参考点、优化可用功率、限功率等控制策略,并在海上与陆上不同风况的风电场部署及测试,对比分析不同有功控制策略下风电场发电量提升比列。

With the rapid development of offshore wind power installation in China,offshore wind power accounts for more and more of the power energy system.At the same time,technologies such as wind power prediction,high and low penetration,and primary frequency modulation have been continuously improved,which improves the adjustability of offshore wind turbine generators,and thus improves the stability of the power system.However,the application of wind power still has problems such as intermittency,fluctuation and being at the end of the power grid.In addition,the offshore wind power storage technology is not yet perfect,so the offshore wind farm must accept the active load dispatching of various local power grids to avoid causing power fluctuations in the grid lines and affecting the stability of the grid and its lines.The wind farm is in the active power dispatching period of the power grid,and the power generation in the wind farm station shall be improved as much as possible.Based on the existing active power control strategies of the energy management system(EMS),such as active power under delivery and line loss,this paper optimizes the active power control reference point,available power,power limiting and other control strategies of the EMS system wind farm,and deploys and tests in offshore and onshore wind farms under different wind conditions to compare and analyze the power generation increase ratio of the wind farm under different active power control strategies.