混合多馈入直流作用下江苏受端电网安全稳定性评估及改善

doi:10.11930/j.issn.1004-9649.202007229

中国电力 ›› 2021, Vol. 54 ›› Issue (9): 55-65.DOI: 10.11930/j.issn.1004-9649.202007229

混合多馈入直流作用下江苏受端电网安全稳定性评估及改善

黄志光¹, 曹路¹, 李建华¹, 张君黎², 王国腾², 徐政²

1. 国家电网有限公司华东分部，上海 200120;
2. 浙江大学电气工程学院，浙江杭州 310027

收稿日期:2020-08-09 修回日期:2020-12-14 发布日期:2021-09-14
作者简介:黄志光(1984-),男,硕士,高级工程师,从事大电网运行控制和仿真计算研究,E-mail:351509804@qq.com;曹路(1971-),男,博士,高级工程师,从事大电网运行控制和管理研究,E-mail:1714083425@qq.com;徐政(1962-),男,通信作者,教授,从事大规模交直流电力系统分析、直流输电与柔性交流输电、电力谐波与电能质量、风电发电技术与风电场并网技术研究,E-mail:xuzheng007@zju.edu.cn
基金资助:
国家电网有限公司华东分部科技项目(混合级联多端特高压直流馈入受端电网仿真和运行控制关键技术(机电暂态仿真和运行控制))

Evaluation and Improvement of Security and Stability of Jiangsu Receiving-End Power Grid with Hybrid Multi-Infeed DC

HUANG Zhiguang¹, CAO Lu¹, LI Jianhua¹, ZHANG Junli², WANG Guoteng², XU Zheng²

1. East China Branch of State Grid Corporation of China, Shanghai 200120, China;
2. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China

Received:2020-08-09 Revised:2020-12-14 Published:2021-09-14
Supported by:
This work is supported by Science and Technology of East China Branch of SGGC (Key Technologies for Simulation and Operation Control of Hybrid Cascaded Multi-terminal UHVDC Fed into Receiving Power Grid)

摘要/Abstract

摘要： 混合馈入直流系统一般指电网换相换流器（line commutated converter，LCC）和模块化多电平换流器（modular multilevel converter，MMC）混合馈入的直流系统。目前，含有多个直流落点的混合多馈入直流系统已在受端电网规划中得到采用，但其对系统安全稳定性的影响尚未明确。为了对混合多馈入直流作用下受端电网的安全稳定性进行量化评估，首先总结了7种评估指标，并形成了一套评估方法。然后，以江苏电网为例进行了分析，说明江苏受端电网的安全稳定性不足，直流系统换相失败是最严重的问题。针对现存问题，先后提出了将彬长直流逆变侧改用MMC的方案1，以及进一步构建受端以MMC为主的多端直流系统的方案2。最后，对2种方案应用效果进行了定量评估，结果说明采用MMC换流站并构建多端直流系统将提升受端电网安全稳定性，也验证了所提评估方法的有效性。

关键词: 混合多馈入直流, 受端电网, 安全稳定性, 换相失败, 多端直流系统

Abstract: The hybrid infeed DC system usually refers to a hybrid infeed DC system with line commutated converter (LCC) and modular multilevel converter (MMC). At present, the hybrid multi-infeed DC system with multiple DC terminal locations has been adopted in planning of receiving-end power grids, but its impact on the system security and stability is not clear. In order to quantitatively evaluate the security and stability of the receiving-end power grid with hybrid multi-infeed DC, this paper summarizes seven evaluation indexes and proposes an evaluation method. Then, a case study of Jiangsu power grid is carried out, which shows that the security and stability of Jiangsu receiving-end power grid is insufficient, and the most serious problem is the commutation failure of DC system. To solve the existing problems, two schemes are proposed: the scheme 1 is to change the inverter-side LCC of Binchang DC into MMC, and the scheme 2 is to construct a multi-terminal DC system mainly based on MMC. Finally, the application effects of two schemes are evaluated quantitatively, which shows that the security and stability of receiving-end power grid will be improved using MMC and constructing multi terminal DC system, and also proves the effectiveness of the proposed evaluation method.

Key words: hybrid multi-infeed DC, receiving-end power grid, security and stability, commutation failure, multi-terminal DC system

黄志光, 曹路, 李建华, 张君黎, 王国腾, 徐政. 混合多馈入直流作用下江苏受端电网安全稳定性评估及改善[J]. 中国电力, 2021, 54(9): 55-65.

HUANG Zhiguang, CAO Lu, LI Jianhua, ZHANG Junli, WANG Guoteng, XU Zheng. Evaluation and Improvement of Security and Stability of Jiangsu Receiving-End Power Grid with Hybrid Multi-Infeed DC[J]. Electric Power, 2021, 54(9): 55-65.

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混合多馈入直流作用下江苏受端电网安全稳定性评估及改善

Evaluation and Improvement of Security and Stability of Jiangsu Receiving-End Power Grid with Hybrid Multi-Infeed DC

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混合多馈入直流作用下江苏受端电网安全稳定性评估及改善

Evaluation and Improvement of Security and Stability of Jiangsu Receiving-End Power Grid with Hybrid Multi-Infeed DC

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