摘要
针对现有风电场虚拟惯量协调控制在风电机组调频辅助功率协调分配及风电机组转速协调恢复方面存在的不足,首先分析了风电场调频能力的影响因素,基于风电机组旋转动能相等原则提出了风电场及多个风电场调频能力的评估方法。然后基于风电分层协同控制的架构,推导分析了风电虚拟惯量协同控制及风电机组转速协调恢复的本质,提出了一种考虑风电机组调频能力的风电场虚拟惯量多机协同控制策略。该策略通过引入协同控制系数,以实现不同风电场风电机组之间调频辅助功率的协调分配,通过直接对风电机组调频辅助功率进行补偿,以实现不同风电场风电机组之间转速的协调恢复。仿真结果表明,所提控制策略在风电机组调频功率协调分配方面,能够在充分发挥风电机组调频能力的同时,保持风电机组虚拟惯量控制的快速响应特点,降低对风电场控制中心通信能力的要求;在风电机组转速协同恢复方面,能够在保证风电机组转速的快速恢复,避免系统频率二次跌落的同时,避免复杂的转速恢复时序安排。
Aiming at the problems existing in auxiliary power distribution and coordinated rotational speed recovery of wind turbines in existing coordinated virtual inertia control for wind farms, this paper firstly analyzed the factors influencing the frequency regulation capability of wind farms, and proposed a frequency regulation capability assessment method for both single and multiple wind farms based on the principle of rotor kinetic energy equality. Then based on hierarchical coordinated control architecture, the essence of coordinated virtual inertia control and rotational speed recovery control of wind farms were analyzed, and a coordinated virtual inertia control strategy of multiple wind turbines in wind farm considering frequency regulation capability was proposed. In this strategy, a coordination control coefficient was introduced to realize coordinated auxiliary power distribution, and by directly compensating the auxiliary power, the coordinated speed recovery control of wind turbines was also accomplished. Simulation results indicated that the proposed strategy could give full play to the frequency regulation capability of wind turbines while maintaining the fast response characteristics of virtual inertia control, thus reducing the communication requirements of wind farm control center. In terms of cooperative wind turbine rotational speed recovery control, the proposed strategy could ensure rapid recovery of rotational speed and effectively avoid the second drop of system frequency. It also avoids complex time sequence arrangement of rotational speed recovery in the meantime.
作者
侍乔明
王刚
李海英
王永平
吴优
付立军
SHI Qiaoming;WANG Gang;LI Haiying;WANG Yongping;WU You;FU Lijun(NR Electric Co.,Ltd.,Nanjing 211102,Jiangsu Province,China;National Key Laboratory of Science and Technology on Vessel Integrated Power System(Naval University of Engineering),Wuhan 430033,Hubei Province,China)
出处
《电网技术》
EI
CSCD
北大核心
2019年第11期4005-4015,共11页
Power System Technology
基金
国家重点研发计划项目(2016YFB0900600)
国家电网公司科技项目(5102-201956300A-0-0-00)~~
关键词
风电场
频率响应
虚拟惯量控制
调频能力评估:协同控制
wind farm
frequency response
virtual inertia control
frequency regulation capability assessment
coordinated control