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.
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页码：152 / 159
页数：7
相关论文
共 18 条
  • [1] Qian K., Sha L., Lin S., Et al., Application of frequency converter in thermal power plant, Electric Power Automation Equipment, 21, 7, pp. 60-61, (2001)
  • [2] Jia G., Gao Y., He J., Et al., Research and application of high voltage variable frequency speed regulation in power plants, Automation of Electric Power Systems, 26, 14, pp. 1-4, (2002)
  • [3] Yu Q., Min Y., Zhu H., Et al., Study and implementation of high-voltage variable-frequency speed adjustable control system of cycle water pump system in thermal power plant, Automation of Electric Power Systems, 27, 7, pp. 70-73, (2003)
  • [4] Hafidz S.A., Basu K.P., Ride through capabilities of load during voltage sag/swell and power interruption with zigzag transformer, 2008 IEEE Conference on Innovative Technologies in Intelligent Systems and Industrial Application, pp. 119-122, (2008)
  • [5] Zhang H., Zhao Z., Yuan L., Et al., A new control strategy of power loss ride through in MV inverters, Advanced Technology of Electrical Engineering and Energy, 25, 3, pp. 68-71, (2006)
  • [6] Montero-Hernandez O.C., Enjeti P.N., Ride-through for critical loads, IEEE Trans on Industry Applications, 8, 6, pp. 45-53, (2002)
  • [7] Liu G., Elimination of power grid instantaneous low voltage or power off using restarting function of inverter, Electric Engineering, 1, (2006)
  • [8] Kong W., Zhang Q., Li R., Et al., Novel method of maintaining D.C. link voltage of inverter in power interruption, Transaction of China Electrotechnical Socitey, 21, 6, pp. 54-58, (2006)
  • [9] Pang S., Jiang W., Application of LVRT equipment in frequency inverters of coal feeder, Electrical Engineering, 3, pp. 89-91, (2013)
  • [10] Naidoo R., Pillay P., A new method of voltage sag and swell detection, IEEE Trans on Power Delivery, 22, 2, pp. 1056-1063, (2007)
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