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1.山东理工大学电气与电子工程学院,山东省淄博市 255000
2.国网泉州供电公司,福建省泉州市 362100
3.国家电网公司华东分部,上海市 200002
Received:29 June 2021,
Revised:2021-10-19,
Published Online:27 December 2021,
Published:25 February 2022
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张军,张新慧,黄超艺等.基于逆变器定频率控制的多分布式电源孤岛检测方法[J].电力系统自动化,2022,46(4):123-131.
ZHANG Jun,ZHANG Xinhui,HUANG Chaoyi,et al.Islanding Detection Method for Multiple Distributed Generators Based on Fixed Frequency Control of Inverter[J].Automation of Electric Power Systems,2022,46(4):123-131.
张军,张新慧,黄超艺等.基于逆变器定频率控制的多分布式电源孤岛检测方法[J].电力系统自动化,2022,46(4):123-131. DOI: 10.7500/AEPS20210629013.
ZHANG Jun,ZHANG Xinhui,HUANG Chaoyi,et al.Islanding Detection Method for Multiple Distributed Generators Based on Fixed Frequency Control of Inverter[J].Automation of Electric Power Systems,2022,46(4):123-131. DOI: 10.7500/AEPS20210629013.
随着分布式电源(DG)渗透率的不断提高,配电网易发生多DG孤岛效应,为了保证电能质量和用电安全,逆变器必须具备孤岛检测功能。针对多DG逆变器因注入扰动量的方向相反而产生稀释效应,导致传统孤岛检测方法失效的问题,提出了一种基于逆变器定频率控制的孤岛检测新方法。该方法利用正弦脉宽调制技术将其中一台逆变器输出电压的频率控制为50 Hz,通过该定频率控制的主逆变器稳定孤岛频率,使得锁相环控制的各从逆变器恢复正常运行状态,消除稀释效应,实现多DG孤岛检测。最后,利用MATLAB/Simulink进行仿真,验证了该方法的有效性。
As the penetration rate of distributed generators (DGs) keeps increasing
the islanding effect of multiple DGs is likely to occur in the distribution network. In order to ensure power quality and power safety
the inverter must have the islanding detection function. To solve the problem of dilution effect caused by the opposite direction of injected disturbance of the multi-DG inverter
which would lead to the failure of the traditional islanding detection method
this paper proposes a new islanding detection method based on the fixed frequency control of inverters. This method uses the sinusoidal pulse width modulation technology to control the frequency of the output voltage of one of the inverters to 50 Hz. The islanding frequency is stabilized by the master inverter controlled to the fixed frequency
so that each slave inverter controlled by the phase-locked loop can be restored to the normal operation state to eliminate the dilution effect
and the islanding of multiple DGs is detected. The effectiveness of the method is verified by the simulation on the MATLAB/Simulink.
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