储能协助风电机组参与电网调频控制策略研究
摘要：风机通过电力电子设备连接至电网，当转子动能与系统频率解耦，无法为电网频率变化提供惯性支撑，随着系统中风电比例的增加，系统频率稳定受到严峻挑战。文中提出一种变系数综合惯性控制方法，风机能够根据频率的扰动灵活调节输出功率；在此基础上，提出结合桨距角备用控制协同调频方法，通过对风速的分段处理，使风电机组参与电网调频具有针对性；为进一步优化风电机组调频性能，风电并网系统增加了储能装置，通过对风储系统惯性进行详细分析，提出了一种风储系统联合调频控制策略，采用模糊控制策略对中高风速区间风储出力分配制定相应的规则，实时调节储能出力系数。最后对风储调频策略进行仿真验证，结果表明，所提方法能有效改善风电机组调频效果，保证高比例风电并网的频率稳定。
Abstract:Wind turbine generators are connected to power grid via power electronic equipments, so the kinetic energy of the rotor is decoupled from system frequency and cannot provide inertial support for grid frequency changes. Along with the increase of the proportion of wind power in power grid, system frequency stability will be severely challenged. For this reason, a variable coefficient integrated inertial control was proposed to make wind turbine enable to flexibly regulate its power output according to the magnitude of frequency disturbance. On this basis, combining with pitch angle deloading control and by means of the segment handling of wind speed, the wind turbine could participate in grid frequency modulation more effectively and targeted. In addition, in order to further optimize the frequency regulation performance, energy storage devices were added in wind power grid-connection system. The inertia of wind power energy storage system was analyzed in detail, and a joint frequency modulation control strategy for wind power energy storage system was proposed, and in allusion to the problem that how to distribute the output of wind power energy storage within medium- and high- wind speed range, a fuzzy logic control strategy was adopted to realtime regulating the output coefficient of energy storage system. Finally, the frequency regulation storage for the proposed wind power energy storage was verified by simulation. Simulation results show that using the proposed method the effect of frequency regulation by wind power units can be effectively improved, so it is beneficial to ensure the frequency stability under high proportion grid connection of wind power generation.
标题：储能协助风电机组参与电网调频控制策略研究
英文标题：Energy Storage Assists Wind Turbines to Participate in Grid Frequency Regulation Control Strategy Research
作者：颜全椿, 顾文, 范立新, 唐一铭, 刘亚南,
关键词：调频, 综合惯性控制, 变系数, 电池储能, 模糊控制,
发表日期：2022-10-10
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