双极型LCC-HVDC直流系统作为黑启动电源的启动方法及策略

doi:10.11930/j.issn.1004-9649.202307082

中国电力 ›› 2024, Vol. 57 ›› Issue (4): 139-150.DOI: 10.11930/j.issn.1004-9649.202307082

双极型LCC-HVDC直流系统作为黑启动电源的启动方法及策略

王清未¹(), 刘之滨¹(), 陈炳奇²(), 林济铿²()

1. 国家电网有限公司华北分部，北京　100053
2. 同济大学电子与信息工程学院，上海　201804

收稿日期:2023-07-23 接受日期:2024-01-02 出版日期:2024-04-28 发布日期:2024-04-26
作者简介:王清未（1991—），男，硕士，工程师，从事电力系统自动化建设运行和管理，E-mail：wang.qingwei@nc.sgcc.com.cn
刘之滨（1985—），男，硕士，高级工程师，从事电力系统自动化建设运行和管理，E-mail：liu.zbin@nc.sgcc.com.cn
陈炳奇（2001—），男，硕士研究生，从事电网应急管理，E-mail：741499628@qq.com
林济铿（1967—），男，通信作者，博士，教授，博士生导师，从事电力系统优化调度、EMS/DEMS、电力市场、规划、分布式发电、电网应急及人工智能等研究，E-mail：mejklin@126.com
基金资助:
国家自然科学基金资助项目（基于图论的智能电网最优电力孤岛形成模型和算法，51177107）。

Startup Method and Strategy for Bipolar LCC-HVDC System Used as Black-Start Power Source

Qingwei WANG¹(), Zhibin LIU¹(), Bingqi CHEN²(), Jikeng LIN²()

1. North China Branch of SGCC, Beijing 100053, China
2. College of Electronic and Information Engineering, Tongji University, Shanghai 201804, China

Received:2023-07-23 Accepted:2024-01-02 Online:2024-04-28 Published:2024-04-26
Supported by:
This work is supported by National Natural Science Foundation of China (Model and Algorithm for Optimal Power Island Formation in Smart Grid Based on Graph Theory, No.51177107).

摘要/Abstract

摘要：

科学合理的黑启动电源及方案是应对电网灾变停电的最有效策略，可加快其系统恢复进程，大幅减少停电损失。双极型换相换流器型高压直流系统（LCC-HVDC）具有调节灵活输电容量大的优势，但其作为黑启动电源存在一定的困难。提出了以双极型LCC-HVDC为黑启动电源的黑启动方法及完整过程，实现向受端无源网络恢复供电，以加速其恢复进程。首先给出了双极型LCC-HVDC作为黑启动电源时所面临的问题及相应的解决策略；进而给出了双极型LCC-HVDC作为黑启动电源恢复向受端无源网络恢复供电的实现过程。该过程包括2个阶段，第1阶段实现双极型LCC-HVDC的仿融冰模式启动；第2阶段为从仿融冰模式过渡到向受端无源网络恢复供电过程。算例证实了该启动方法的有效性和正确性。该方法使双极型LCC-HVDC具备了黑启动能力，并利用直流系统为受端电网的系统恢复过程提供了电压和频率支撑。

关键词: 黑启动电源, 双极型LCC-HVDC直流系统, 仿融冰模式, 电网灾变停电, 受端无源网络

Abstract:

The scientific and reasonable black-start scheme is the most effective measure to cope with the power grid blackout, which can greatly accelerate the system recovery process, thus significantly reducing the losses of power system due to power failure. The bipolar LCC-HVDC system has the advantages of flexible regulation and large transmission capacity, while it has some difficulties as a black start source. This paper presents a new black start method for bipolar LCC-HVDC system used as the black start power source to restore the power supply of the passive receiving-end network, so as to speed up the the recovery process. Firstly, the problems for using bipolar LCC-HVDC system as a black start source and the corresponding addressing measures are presented. And then, the implementation processes for using the bipolar LCC-HVDC system as a black start power source to restore the power supply of the passive receiving-end network are presented in detail. The process includes two stages: the first stage realizes the pseudo-deicer mode startup of the bipolar LCC-HVDC system; the second stage realizes the transition from the pseudo-deicer mode to the restoration of power supply of the passive receiving-end network. The case study verified the effectiveness and validity of the proposed method. This method makes the bipolar LCC-HVDC system have the black-start capability, and utilizes the DC system to provide voltage and frequency support for system restoration of the receiving-end power grid.

Key words: black-start power source, LCC-HVDC system, pseudo-deicer mode, power grid blackout, passive receiving-end network

王清未, 刘之滨, 陈炳奇, 林济铿. 双极型LCC-HVDC直流系统作为黑启动电源的启动方法及策略[J]. 中国电力, 2024, 57(4): 139-150.

Qingwei WANG, Zhibin LIU, Bingqi CHEN, Jikeng LIN. Startup Method and Strategy for Bipolar LCC-HVDC System Used as Black-Start Power Source[J]. Electric Power, 2024, 57(4): 139-150.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202307082

https://www.electricpower.com.cn/CN/Y2024/V57/I4/139

图/表 14

图 1 双极型LCC-HVDC系统示意

Fig.1 Diagram of the bipolar LCC-HVDC system

图 2 黑启动过程功率传输示意

Fig.2 Diagram of power transmission during black start

图 3 换流器初始换相过程示意

Fig.3 Diagram of the initial commutation process of the converter

图 4 定交流电压控制框图

Fig.4 Block diagram of AC voltage control

图 5 仿融冰启动流程

Fig.5 Pseudo-deicer startup flow chart

图 6 负载恢复流程

Fig.6 Load restoration flow chart

图 7 双极型LCC-HVDC仿真模型

Fig.7 Bipolar LCC-HVDC simulation model

图 8 仿融冰启动阶段波形

Fig.8 Waveform of the pseudo-deicer startup stage

图 9 反送功率降低阶段波形

Fig.9 Waveform of the reverse power reduction stage

图 10 正送功率提升阶段波形

Fig.10 Waveform of the forward power increase stage

图 11 纯阻抗负荷模型下受端交流频率波形

Fig.11 Waveform of the receiving-end AC frequency of pure impedence load model

图 12 火电厂厂用负荷模型

Fig.12 Thermal power plant service load model

图 13 火电厂厂用负荷恢复波形

Fig.13 Waveform of the thermal power plant service load restoration

图 14 厂用负荷模型下受端交流频率波形

Fig.14 Waveform of the receiving-end AC frequency of plant load model

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双极型LCC-HVDC直流系统作为黑启动电源的启动方法及策略

Startup Method and Strategy for Bipolar LCC-HVDC System Used as Black-Start Power Source

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