电源学报

抑制混合级联直流输电系统受端后续换相失败联合控制策略

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周楠 , 张巍

电源学报 | 电力电子化电力系统 2026,24(9): 224-235

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电源学报 |电力电子化电力系统 2026 , 24 (9) : 224 -235

抑制混合级联直流输电系统受端后续换相失败联合控制策略

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周楠, 张巍

作者信息

上海理工大学机械工程学院，上海　200093

通讯作者:

周楠（1998—　），男，通信作者，硕士研究生。研究方向：高压直流输电技术。E-mail：222221558@st.usst.edu.cn。

作者简介:

张巍（1983—　），男，博士，讲师。研究方向：电力系统运行与控制。E-mail：zw19830904@usst.edu.cn。

Joint Control Strategy for Suppressing Subsequent Phase Change Failures at the Receiving End of Hybrid Cascaded DC Transmission Systems

Nan ZHOU, Wei ZHANG

Affiliations

School of mechanical engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

出版时间: 2026-09-30 doi: 10.13234/j.issn.2095-2805.2026.9.224

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摘要

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混合级联直流输电系统受端由电网换相换流器LCC（line commutated converter）和模块化多电平换流器MMC（modular multilevel converter）并联模块串联而成，此特殊结构已应用于实际工程。但由于LCC极难避免的首次换相失败以及受端LCC和MMC之间复杂的电气特性关系，抑制混合级联直流输电系统受端后续换相失败的控制策略成为难点。为此，提出了一种抑制混合级联输电系统后续换相失败联合控制策略，即将逆变侧LCC关断角的变化量转化为MMC发出的无功功率，并且进行合理的MMC无功功率分配，同时在LCC中加入非线性低压限流VDCOL（voltage dependent current order limiter）控制策略，以达到对混合级联直流输电系统后续换相失败的有效抑制。针对所提出的受端联合控制策略，在PSCAD中搭建对应的仿真模型并进行仿真分析，结果验证了所提方法的正确性以及对多种故障的适应性。

关键词

混合级联 / 后续换相失败 / 关断角 / 功率分配 / 低压限流 / 联合控制

Abstract

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The receiving end of the hybrid cascaded DC transmission system adopts a series structure composed of a line commutated converter (LCC) and parallel-connected modular multilevel converter (MMC) modules. This special structure has been applied in practical engineering. However, due to the extremely unavoidable first phase change failure of LCCs and the complex electrical characteristic relationship between LCCs and MMCs at the receiving end, the control strategy for suppressing the subsequent phase change failure at the receiving end of the hybrid cascaded DC transmission system has become difficult. To this end, a joint control strategy for suppressing subsequent phase change failure in hybrid cascaded DC transmission systems is proposed, which is to convert the variation of the inverter-side LCC extinction angle into the reactive power issued by the MMC, and to carry out a reasonable reactive power allocation of the MMC, and at the same time, to add a nonlinear voltage dependent current order limiter (VDCOL) control strategy in the LCC to achieve effective suppression of subsequent phase change failures in the hybrid cascaded DC transmission system. A simulation model is constructed in PSCAD to analyze the proposed joint control strategy, and the correctness of the proposed method and its adaptability to multiple faults are verified.

Key words

Hybrid cascade / subsequent phase change failure / extinction angle / power distribution / low-voltage current limiting / joint control

引用本文

周楠, 张巍. 抑制混合级联直流输电系统受端后续换相失败联合控制策略. 电源学报, 2026 , 24 (9) : 224 -235 . DOI: 10.13234/j.issn.2095-2805.2026.9.224

Nan ZHOU, Wei ZHANG. Joint Control Strategy for Suppressing Subsequent Phase Change Failures at the Receiving End of Hybrid Cascaded DC Transmission Systems[J]. Journal of Power Supply, 2026 , 24 (9) : 224 -235 . DOI: 10.13234/j.issn.2095-2805.2026.9.224

基金

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上海市重点实验室开放基金资助项目(Z-2019-304-001)

参考文献

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2026年第24卷第9期

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文章信息

doi: 10.13234/j.issn.2095-2805.2026.9.224

接收时间：2024-09-13
首发时间：2026-10-29
出版时间：2026-09-30

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收稿日期：2024-09-13
修回日期：2024-12-25
录用日期：2025-02-17

基金

Shanghai Key Laboratory Open Fund Funding Project(Z-2019-304-001)

上海市重点实验室开放基金资助项目(Z-2019-304-001)

作者信息

上海理工大学机械工程学院，上海　200093

通讯作者:

周楠（1998—　），男，通信作者，硕士研究生。研究方向：高压直流输电技术。E-mail：222221558@st.usst.edu.cn。

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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