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    风储联合运行系统在电力系统调频中的研究进展与展望

    Research progress and perspectives on wind-storage hybrid sys-tems for power system frequency regulation

    • 摘要: 全球能源转型进程持续深化,风电、光伏等新能源并网规模逐年扩张,电力系统同步旋转惯量持续衰减,传统跟网型新能源机组依托电力电子变流器与电网解耦,天然缺乏自主频率支撑能力,电网抗扰动能力大幅弱化,负荷突变、线路故障等工况下极易出现频率大幅偏移、暂态失稳等安全问题。系统回顾了风储系统的惯性响应和一次调频、双馈感应发电机(Doubly Fed Induction Generators,DFIGs)与同步发电机协同控制、虚拟同步机(Virtual Synchronous Generator,VSG)技术、储能容量优化配置及高渗透率电网适应性等方面的主要研究进展,归纳了不同控制策略在频率支撑、经济性和适应性方面的应用成效。首先,详细梳理惯性响应与一次调频主流控制策略的应用路径,阐述虚拟惯性模拟、转子动能释放、超速减载、变桨距调节等典型方案的作用机理,对比不同控制手段在抑制频率跌落、缩短扰动恢复时长上的支撑效果。其次,探讨了双馈与同步发电机的协同控制及重点剖析VSG控制技术复刻同步机外特性、提升系统暂态频率稳定的突出优势。接着,探讨了基于多目标优化和容量配置,实现储能系统频率调节效率和经济性的提升方面的成果。最后,分析了高渗透率电网中的风储适应性,重点关注构网型控制、分布式控制等在复杂电网环境中的应用。该综述构建风储联合调频技术全景研究脉络,可为高比例新能源电力系统下风储联合装置设计、控制策略优化、储能容量规划、工程示范落地提供完整理论依据与技术参考,有助于未来构建稳定高效的现代电力系统。

       

      Abstract: With the continuous deepening of the global energy transition, the grid-connected capacity of new energy sources such as wind power and photovoltaic power expands year by year, leading to continuous attenuation of the synchronous rotational inertia of power systems. Traditional grid-following new energy units are decoupled from power grids via power electronic converters, which inherently lack the capability of autonomous frequency support and greatly weaken the anti-disturbance capacity of power grids, and severe safety risks including significant frequency deviation and transient instability are highly likely to occur under operating conditions such as sudden load changes and line faults. Major research advances covering inertial response and primary frequency regulation of wind-storage hybrid systems, coordinated control of doubly fed induction generators (DFIGs) and synchronous generators, virtual synchronous generator (VSG) technology, optimal allocation of energy storage capacity, as well as the grid adaptability under high renewable penetration are systematically reviewed, and the application performances of diverse control strategies in frequency support, economic efficiency and grid adaptability are summarized. Firstly, the application paths of mainstream control strategies for inertial response and primary frequency regulation are sorted out in detail, the operating mechanisms of typical schemes including virtual inertia emulation, rotor kinetic energy release, overspeed load reduction and pitch angle regulation are elaborated, and the supporting effects of different control methods in restraining frequency drop and shortening disturbance recovery time are compared. Secondly, the coordinated control of DFIGs and synchronous generators is discussed, and the prominent advantages of VSG control technology in reproducing the external characteristics of synchronous generators and improving the transient frequency stability of power systems are analyzed emphatically. Thirdly, relevant research achievements in boosting the frequency regulation efficiency and economic performance of energy storage systems through multi-objective optimization and capacity configuration are investigated. Finally, the adaptability of wind-storage systems in high-penetration power grids is analyzed, with particular focus on the application of grid-forming control and distributed control in complex grid environments. This review establishes a comprehensive research framework of wind-storage joint frequency regulation technologies, which can provide complete theoretical basis and technical references for the design of wind-storage combined equipment, optimization of control strategies, planning of energy storage capacity and implementation of engineering demonstrations in power systems with high penetration of renewable energy, and facilitates the construction of stable and efficient modern power systems in the future.

       

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