基于多相风力发电系统的容错控制策略研究

doi:10.11930/j.issn.1004-9649.202107095

中国电力 ›› 2022, Vol. 55 ›› Issue (7): 134-141.DOI: 10.11930/j.issn.1004-9649.202107095

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基于多相风力发电系统的容错控制策略研究

周诗嘉¹, 杨光源², 彭光强², 武霁阳², 辛清明¹

1. 南方电网科学研究院有限责任公司，广东广州 510080;
2. 中国南方电网有限责任公司超高压输电公司检修试验中心，广东广州 510663

收稿日期:2021-07-21 修回日期:2022-04-27 出版日期:2022-07-28 发布日期:2022-07-20
作者简介:周诗嘉（1991—），女，通信作者，博士研究生，从事新能源发电、变流器控制技术研究，E-mail：zhou_shijia@163.com
基金资助:
国家自然科学基金资助项目（中压大功率风电机组直接AC/AC变流并网系统结构与控制技术，51977070）；南方电网有限公司科技项目（ZBKJXM20180560）。

Fault-Tolerant Control Strategy Based on Multi-Phase Wind Power System

ZHOU Shijia¹, YANG Guangyuan², PENG Guangqiang², WU Jiyang², XIN Qingming¹

1. China Southern Power Grid Research Institute Co., Ltd., Guangzhou 510080, China;
2. Maintenance & Test Center, China Southern Power Grid EHV Power Transmission Company, Guangzhou 510663, China

Received:2021-07-21 Revised:2022-04-27 Online:2022-07-28 Published:2022-07-20
Supported by:
This work is supported by National Natural Science Foundation of China (The Direct AC/AC Converter Topology and Control System for Medium-Voltage and High-Power Wind Turbines, No.51977070), Science and Technology Project of China Southern Power Grid (No.ZBKJXM20180560).

摘要/Abstract

摘要： 多相电机具有转矩大、转矩脉动低以及容错性高的特点，尤为适用于风力发电系统这种低速大功率的应用场合。提出一种基于多相直驱永磁同步发电机的风力发电系统，多相风机经三相桥式不控整流器、隔离型DC/DC和模块化多电平变流器并入高压直流电网。首先，采用基于转速外环的MPPT控制得到三相桥式不控整流器的平均电流参考值；然后，根据变流器工作状态对各套三相桥式不控整流器的电流参考值进行重构，实现正常相输出功率平衡，确保故障相不会出现过流，达到系统的容错控制，提高可靠性；最后，通过模块化多电平变流器单桥臂接入直流电网，降低了变流器复杂度。以18相风力发电机为例，搭建了Matlab/Simulink仿真模型，验证了所提拓扑结构及容错控制策略的有效性。

关键词: 多相风机, 风力发电, 容错控制策略, 模块化多电平变流器, DC/DC变流器

Abstract: Owing to their characteristics of large torque, low torque ripple, and high fault tolerance, multi-phase motors are especially suitable for low-speed high-power application scenarios such as wind power systems. This paper proposes a wind power system based on multi-phase direct-drive permanent magnet synchronous generators. The multi-phase wind turbines are integrated into the high-voltage direct-current (DC) grid via three-phase bridge uncontrolled rectifiers, isolated DC/DC converters, and modular multilevel converters (MMCs). Specifically, an average current reference value of the three-phase bridge uncontrolled rectifiers is obtained by maximum power point tracking (MPPT) control based on an outer speed loop. Then, the current reference values of each set of three-phase bridge uncontrolled rectifiers are reconstructed according to the working state of the converter for the output power balance of the normal phase. The aim is to ensure that overcurrent does not occur in the fault phase, achieve fault-tolerant control of the system, and thereby improve reliability. Finally, the wind turbine is connected to the DC grid via the single bridge arm of the MMC to reduce the complexity of the converter. With 18-phase wind turbines as an example, a Matlab/Simulink simulation model is built to verify the effectiveness of the proposed topology and fault-tolerant control strategy.

Key words: multi-phase wind turbine, wind power generation, fault-tolerant control strategy, modular multilevel converter, DC/DC converter

周诗嘉, 杨光源, 彭光强, 武霁阳, 辛清明. 基于多相风力发电系统的容错控制策略研究[J]. 中国电力, 2022, 55(7): 134-141.

ZHOU Shijia, YANG Guangyuan, PENG Guangqiang, WU Jiyang, XIN Qingming. Fault-Tolerant Control Strategy Based on Multi-Phase Wind Power System[J]. Electric Power, 2022, 55(7): 134-141.

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https://www.electricpower.com.cn/CN/Y2022/V55/I7/134

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基于多相风力发电系统的容错控制策略研究

Fault-Tolerant Control Strategy Based on Multi-Phase Wind Power System

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Fault-Tolerant Control Strategy Based on Multi-Phase Wind Power System

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