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基于MPPMSG的混合高压直流风电系统故障穿越技术
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西安交通大学电气工程学院,陕西省西安市 710049

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基金项目:

国家自然科学基金面上项目(51477134)。


Fault Ride-through Technology of Hybrid HVDC Wind Power System Based on Multi-phase Permanent Magnet Synchronous Generator
Author:
Affiliation:

School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Fund Project:

This work is supported by National Natural Science Foundation of China (No.51477134).

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    摘要:

    为解决传统风电系统变换级数多的问题,文中提出了一种基于多相永磁同步电机(MPPMSG)的混合高压直流风电系统拓扑。电机多套绕组分别连接单极性变流器并在直流侧串联形成高压直接接入直流母线,一套绕组向电机注入无功功率以改善电机调速和稳态性能。岸上变电站采用电网换相换流器,直流母线短路时可阻断短路电流。为解决多绕组耦合问题,MPPMSG采用了反馈解耦的控制策略。根据发电机短路特性分析,提出了直流母线短路时限制电机短路电流,以及直流故障穿越的控制策略。最后,利用PSCAD/EMTDC搭建风电系统开关电路仿真模型,验证了所提控制策略的有效性。

    Abstract:

    To solve the problem of various transform series for traditional wind power system, this paper proposes a hybrid topology of high voltage direct current(HVDC) wind power system based on multi-phase permanent magnet synchronous generator (MPPMSG). The multiple sets of windings of the generator are separately connected to unipolar converters, which connects in series on the DC side and transfers into high voltage to connect the HVDC transmission line. One set of windings injects reactive power into the generator to improve the generator speed regulation and steady-state performance. On the on-shore substation, the line commutated converter (LCC) based on thyristors is applied because of its advantage to block the short-circuit current when the DC transmission line is shorted. In order to solve the multi-winding coupling problem, a feedback decoupling control strategy is adopted for MPPMSG. According to the analysis of short-circuit characteristics for generator, a fault ride-through strategy is proposed combined with the short-circuit current limitation method, which can deal with the short-circuit fault of DC transmission line effectively. Finally, the switching-circuit simulation model of the hybrid wind power system is built in PSCAD/EMTDC, and the effectiveness of the proposed control strategy is verified.

    表 2 Table 2 Hybrid HVDC transmission system parameters
    表 1 Table 1
    图1 混合高压直流风电系统单机拓扑图Fig.1 Single-machine topology diagram of hybrid HVDC wind power system
    图2 最大冲击电流相短路电流波形Fig.2 Short-circuit current waveform of maximum impact current phase
    图3 混合风电系统直流故障穿越的控制流程图Fig.3 Flow chart of DC fault ride-through control for hybrid wind power system
    图4 混合高压直流风电系统直流故障穿越波形Fig.4 DC fault ride-through waveform of hybrid HVDC wind power system
    图5 不同无功注入条件下穿越波形Fig.5 Ride-through waveform with different reactive injection conditions
    图 电机的动态响应波形Fig. Dynamic response waveform of generator
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引用本文

刘寅迪,曾翔君,骆一萍,等.基于MPPMSG的混合高压直流风电系统故障穿越技术[J/OL].电力系统自动化,http://doi.org/10.7500/AEPS20190427001.
LIU Yindi,ZENG Xiangjun,LUO Yiping,et al.Fault Ride-through Technology of Hybrid HVDC Wind Power System Based on Multi-phase Permanent Magnet Synchronous Generator[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20190427001.

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  • 收稿日期:2019-04-27
  • 最后修改日期:2020-02-21
  • 录用日期:2019-10-10
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