基于电化学储能的多馈入直流系统暂态控制及影响因素分析

doi:10.19595/j.cnki.1000-6753.tces.L90073

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摘要随着越来越多大容量特高压直流输电工程建成投运,我国电力系统逐渐形成交直流混联结构,电网耦合特性更加复杂,系统的安全稳定运行面临更大挑战。电网侧电化学储能技术近年来在电网中快速发展,有望成为改善交直流混联系统稳定性的有效控制手段。该文针对多馈入直流系统暂态过程中的连续换相失败问题,分析了连续换相失败的机理及储能电站的作用机制,提出了储能电站改进暂态无功控制策略,优化了储能电站的暂态控制效果,并进一步分析了储能电站的容量大小与接入位置两个关键因素对控制效果的影响。以河南多馈入直流系统为例,仿真结果验证了所提储能电站改进暂态无功控制策略能够实现较好的换相失败控制效果。此外,遍历仿真结果也揭示了容量大小与接入位置对储能电站控制效果的影响规律。

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	李培平
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关键词 ：多馈入直流系统, 电化学储能, 连续换相失败, 改进无功控制策略, 容量与接入位置

Abstract：As more and more large-capacity HVDC transmission projects are completed and put into operation, our country's power system is gradually forming an AC-DC hybrid structure, the coupling characteristics of the power grid are more complex, and the system's safe and stable operation is facing greater challenges. The grid-side electrochemical energy storage technology has developed rapidly in recent years and is expected to become an effective control method for improving the stability of AC-DC hybrid systems. Aiming at the problem of continuous commutation failure in the transient process of multi-infeed HVDC system, this paper analyzes the mechanism of continuous commutation failure and the mechanism of the energy storage power station, proposes an improved transient reactive power control strategy for energy storage power station, optimizes the transient control effect of energy storage power station, and further analyzed the impact of the two key factors on the control effect, such as the capacity and access location of the energy storage power station. Taking Henan multi-infeed HVDC system as an example, the simulation results verify that the proposed improved transient reactive power control strategy of energy storage power station can achieve a better commutation failure control effect. In addition, the traversal simulation results also revealed the influence of capacity and access location on the control effect of energy storage power station.

Key words： Multi-infeed HVDC system electrochemical energy storage continuous commutation failure improve reactive power control strategy capacity and access location

收稿日期: 2020-06-20

PACS:

TM712

基金资助:国家电网有限公司总部科技资助项目（电化学储能电站群在特高压交直流混联受端电网应用关键技术研究及示范：5419-201924207A-0-0-00）

通讯作者: 姚伟男,1983年生,教授,博士生导师,研究方向为大电网稳定性分析与控制、可再生能源并网系统的稳定性分析与控制、柔性直流输电系统及其控制等。E-mail: w.yao@hust.edu.cn

作者简介: 李培平男,1995年生,硕士,研究方向为新能源电力系统的稳定与控制、特高压直流输电系统运行及控制。E-mail: peiping.li@foxmail.com

引用本文:

李培平, 姚伟, 高东学, 张景超, 李程昊. 基于电化学储能的多馈入直流系统暂态控制及影响因素分析[J]. 电工技术学报, 2021, 36(zk1): 154-167. Li Peiping, Yao Wei, Gao Dongxue, Zhang Jingchao, Li Chenghao. Transient Control and Influencing Factors Analysis of Multi-Infeed HVDC System Based on Electrochemical Energy Storage. Transactions of China Electrotechnical Society, 2021, 36(zk1): 154-167.

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