Multi-layer coordinated frequency control strategy for WTGs and energy storage considering system inertia requirement

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2024-11-15 DOI:10.1016/j.epsr.2024.111190

Meng Lingcong , Qin Chao , Hongtao Liu , Ligang Zhao , Huifan Xie , Hongyue Zhen

{"title":"Multi-layer coordinated frequency control strategy for WTGs and energy storage considering system inertia requirement","authors":"Meng Lingcong , Qin Chao , Hongtao Liu , Ligang Zhao , Huifan Xie , Hongyue Zhen","doi":"10.1016/j.epsr.2024.111190","DOIUrl":null,"url":null,"abstract":"<div><div>Given the intimate correlation between the inertia response ability of wind turbine generators (WTGs) and their operational statuses, it becomes imperative to analyze the inertia contribution from wind farms across varying wind speeds and establish the rate of change of frequency (RoCoF) security boundary. Such endeavors are crucial for grid operators to assess the system's ability to withstand disturbances. This paper proposes a multi-layer frequency control method for hybrid wind power and energy storage (ES) systems. All WTGs and ESs in the wind farm are divided into several clusters. At the wind farm layer, the wind farm control center quantitatively assesses the maximum inertia that the wind farm can provide based on real-time wind speed and the operational status of WTGs, and communicates this information to the grid control center. At the grid layer, the power system operators establish the security boundary related to the RoCoF based on the inertia level of the wind farm and synchronous generators, thereby continuously evaluating the system's ability to withstand disturbances in real-time. In the event of significant disturbances (N-1 event), the power system dispatch center issues instructions to the wind farm, specifying the required level of inertia to be provided. The wind farm, in turn, coordinates the allocation of inertia among WTGs and ESs based on the dispatch center's instructions and considers the operational status of different WTGs, while tracking the system control commands. Through this approach, the inertia response ability of different WTGs and ESs can be fully utilized to enhance the transient frequency characteristics of the grid.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"239 ","pages":"Article 111190"},"PeriodicalIF":3.3000,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electric Power Systems Research","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378779624010769","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}

引用次数: 0

Abstract

Given the intimate correlation between the inertia response ability of wind turbine generators (WTGs) and their operational statuses, it becomes imperative to analyze the inertia contribution from wind farms across varying wind speeds and establish the rate of change of frequency (RoCoF) security boundary. Such endeavors are crucial for grid operators to assess the system's ability to withstand disturbances. This paper proposes a multi-layer frequency control method for hybrid wind power and energy storage (ES) systems. All WTGs and ESs in the wind farm are divided into several clusters. At the wind farm layer, the wind farm control center quantitatively assesses the maximum inertia that the wind farm can provide based on real-time wind speed and the operational status of WTGs, and communicates this information to the grid control center. At the grid layer, the power system operators establish the security boundary related to the RoCoF based on the inertia level of the wind farm and synchronous generators, thereby continuously evaluating the system's ability to withstand disturbances in real-time. In the event of significant disturbances (N-1 event), the power system dispatch center issues instructions to the wind farm, specifying the required level of inertia to be provided. The wind farm, in turn, coordinates the allocation of inertia among WTGs and ESs based on the dispatch center's instructions and considers the operational status of different WTGs, while tracking the system control commands. Through this approach, the inertia response ability of different WTGs and ESs can be fully utilized to enhance the transient frequency characteristics of the grid.

查看原文本刊更多论文

考虑系统惯性要求的风电机组和储能多层协调频率控制策略

鉴于风力涡轮发电机（WTGs）的惯性响应能力与其运行状态密切相关，因此分析风电场在不同风速下的惯性贡献并确定频率变化率（RoCoF）安全边界变得势在必行。这些工作对于电网运营商评估系统抗干扰能力至关重要。本文针对风电和储能（ES）混合系统提出了一种多层频率控制方法。风电场中的所有风电机组和储能系统被划分为多个群组。在风电场层，风电场控制中心根据实时风速和风电机组的运行状态，定量评估风电场可提供的最大惯量，并将此信息传递给电网控制中心。在电网层，电力系统运营商根据风电场和同步发电机的惯性水平建立与 RoCoF 相关的安全边界，从而持续实时评估系统抵御干扰的能力。在发生重大扰动（N-1 事件）时，电力系统调度中心会向风电场发出指令，规定需要提供的惯性水平。风电场则根据调度中心的指令，在跟踪系统控制命令的同时，考虑不同风电机组的运行状态，协调风电机组和 ES 之间的惯性分配。通过这种方法，可以充分利用不同风电机组和风电设备的惯性响应能力，提高电网的瞬态频率特性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.