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Solution to short-term frequency response of wind farms by using energy storage systems

机译：利用储能系统解决风电场短期频率响应的方案

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摘要

The increasing high penetration of wind power is bringing a serious challenge to the frequency regulation of power system, for wind turbine generators are unable to naturally contribute to system frequency response. To address this problem, this study proposes a control strategy to compensate the lack of short-term frequency response ability of wind farms (WFs) by the energy storage system (ESS). First, the rated power and capacity of the ESS, which is installed at the point of common coupling of the WF to make it have similar short-term frequency response ability to that of synchronous generators, are determined. The theoretical minimum rated power of the ESS should be about 5% rated power of the WF, only if the active power output of the ESS is controlled as its rated power during the whole inertial response process. Then, a fuzzy logic controller is designed for the ESS so that the required rated power of the ESS could reach its theoretical minimum value as closer as possible. Simulation results of a simplified practical power system show that WFs with the proposed strategy could response to the frequency change rapidly and support short-term frequency control effectively under various disturbances.
机译：风力发电的高普及率正给电力系统的频率调节带来严峻挑战，因为风力涡轮发电机无法自然地对系统频率响应做出贡献。为了解决这个问题，本研究提出了一种控制策略，以弥补储能系统（ESS）对风电场（WFs）的短期频率响应能力的不足。首先，确定安装在WF的公共耦合点上的ESS的额定功率和容量，以使其具有与同步发电机相似的短期频率响应能力。仅当在整个惯性响应过程中将ESS的有功功率输出控制为其额定功率时，ESS的理论最小额定功率才应约为WF的5％额定功率。然后，为ESS设计模糊逻辑控制器，以便ESS所需的额定功率可以尽可能接近其理论最小值。简化的实际电力系统的仿真结果表明，提出的策略的WF可以快速响应频率变化，并在各种干扰下有效地支持短期频率控制。

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