摘要
大规模随机波动的风电功率接入电力系统将引起系统频率偏差增大,从而对电力系统的频率响应能力提出了更高要求。该文基于实测数据研究了风电功率的频率特性,分析了不同频段内的风电功率波动对电力系统调频的影响。在一次调频时间尺度下,分析了调差系数取值对一次调频控制系统稳定性的影响,并基于分频原理提出火电机组动态一次调频控制策略。该策略通过在不同频段内设置不同的火电机组调差系数,提高了火电机组的一次调频能力。将该策略应用于两区域电力系统,结合实测风电场功率波动数据进行了算例仿真,仿真结果表明利用该策略能有效减少风电功率波动对系统频率稳定的影响。
Large-scale wind power fluctuations have caused greater frequency deviation in power systems.Thus,higher frequency response capability is required.In this paper,the frequency characteristics of wind power are studied based on measured data and the influence of wind power fluctuations on frequency regulation are analyzed.In the time scale of primary frequency regulation,the coupling relationship between the droop and the stability of the primary frequency control system is analyzed.Based on the principle of frequency division,a dynamic primary frequency regulation strategy is presented.The droop coefficients of thermal units are set dynamically according to different frequency bands.The frequency regulation ability in low frequency bands is particularly improved.Case study in time domain of a two-area power system is analyzed and advantages of the strategy are verified.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2018年第4期974-984,共11页
Proceedings of the CSEE
基金
国家重点研究发展计划(2016YFB0901903)
国家自然科学基金项目(51676054)~~
关键词
风电功率波动
火电机组
一次调频能力
调差系数
动态一次调频
wind power fluctuation
thermal unit
primaryfrequency regulation ability
droop
dynamic primaryfrequency regulation
