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哈尔滨工业大学(深圳)机电工程与自动化学院,广东省深圳市 518055
Received:07 February 2021,
Revised:2021-05-05,
Published Online:02 July 2021,
Published:25 September 2021
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王灿,邓灿,潘学伟等.基于线路阻抗补偿的互联变流器控制策略[J].电力系统自动化,2021,45(18):141-150.
WANG Can,DENG Can,PAN Xuewei,et al.Control Strategy for Interlinking Converter Based on Line Impedance Compensation[J].Automation of Electric Power Systems,2021,45(18):141-150.
王灿,邓灿,潘学伟等.基于线路阻抗补偿的互联变流器控制策略[J].电力系统自动化,2021,45(18):141-150. DOI: 10.7500/AEPS20210207001.
WANG Can,DENG Can,PAN Xuewei,et al.Control Strategy for Interlinking Converter Based on Line Impedance Compensation[J].Automation of Electric Power Systems,2021,45(18):141-150. DOI: 10.7500/AEPS20210207001.
为了解决线路阻抗压降导致互联变流器(IC)传输功率存在偏差的问题,文中提出一种基于线路阻抗补偿的控制策略。首先,该方法借助交流母线处的变换器,向IC侧注入一定频率的谐波,其谐波频率与注入时刻母线电压存在一定函数关系,并在IC侧通过滤波器和锁相环得到谐波频率,结合IC侧的本地功率和电压,获取线路阻抗。然后,在线路阻抗检测的基础上,通过在IC的控制中补偿线路压降,从而在无互联通信的情况下实现功率的准确传输。最后,在MATLAB和StarSim实时仿真平台上搭建交直流混合微电网模型,验证了所提方法的有效性。
In order to solve the problem of deviations in the transmitted power of the interlinking converter (IC) due to line impedance voltage drop
this paper proposes a control strategy based on the line impedance compensation. First
harmonics of a certain frequency are injected into the IC side with the help of a converter at the AC bus. The harmonic frequency is a function of the bus voltage at the time of injection and is obtained on the IC side through a filter and a phase-locked loop. Then
the line impedance is obtained by combining the local power and voltage on the IC side. Based on the line impedance detection
the line voltage drop can be compensated in the control of the IC
so as to achieve accurate power transmission without interconnected communication. Finally
a hybrid AC/DC microgrid model is built on MATLAB and StarSim real-time simulation platform to verify the effectiveness of the proposed method.
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