Power source with low-voltage ride-through capability for auxiliary equipment inverter of thermal power plant

被引：0

作者：

Wang, Xiaoyu ^{[1
]}

Zhang, Tao ^{[2
]}

Liu, Shu ^{[2
]}

Cao, Fengmei ^{[2
]}

Liu, Zhichao ^{[2
]}

Yang, Qixun ^{[1
,2
]}

机构：

[1] State Key Lab of New Energy Power System, North China Electric Power University, Beijing

[2] Beijing Sifang Automation Co. Ltd., Beijing

来源：

Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2015年 / 35卷 / 05期

关键词：

apparatus; Electric inverters; Electric power supplies to; Grid voltage sag; Low-voltage ride-through; Neural networks; Single-neuron PI; Thermal power plant;

D O I：

10.16081/j.issn.1006-6047.2015.05.024

中图分类号：

学科分类号：

摘要：

Since the low-voltage protection of auxiliary equipment inverter may trip the equipment due to bus voltage sag, leading to the unscheduled unit shutdown of thermal power plant, a power source with low-voltage ride-through capability based on the power electronic devices is designed for the passive inverter. Its main circuit consists of an AC-DC converter based on the triple parallel interleaving Boost circuit with reduced inductor current and capacitor voltage ripple, a three-phase AC bypass channel with high reliability and a single-phase AC power source for control. A method of fast grid-voltage-sag detection and multiple operating modes are proposed according to its topology. A strategy of single-neuron adaptive PI control with the square output error as its performance index is adopted to facilitate the control parameter setting and site commissioning. The results of electromagnetic transient simulation, field test and actual application show that, the designed device has better dynamic and static output characteristics and effective low-voltage ride-through capability. ©, 2015, Electric Power Automation Equipment Press. All right reserved.

引用

页码：152 / 159

页数：7

共 18 条

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