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Grid-Connected Emergency Back-Up Power Supply

机译：电网紧急备用电源

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摘要

This paper documents design and modeling of a grid-connected emergency back-up power supply for medium power applications. Back-up power supplies are very important in regard to support electrical loads in the events of grid power outage. However, grid-integration of a back-up power supply substantiates continual power transfer to the loads, especially to the critical loads, which should not suffer from power interruptions. Therefore, design and circuit modeling of switching converters based reliable grid-tied emergency back-up power supply are presented in this paper. There are a rectifier-link boost derived battery charging circuit and a 4-switch push-pull power inverter circuit which are controlled by high frequency pulse width modulation (PWM) signals. This paper presents a state averaging model and Laplace domain transfer function of the charging circuit and a switching converter model of the power inverter circuit. A changeover relay based transfer switch controls the power flow towards the utility loads. During off-grid situations, loads are fed power by the proposed inverter circuit and during on-grid situations, battery is charged by an ac-link rectifier-fed boost converter. However, there is a relay switching circuit to control the charging phenomenon of the battery. The proposed design is simulated in PLECS and the simulation results corroborate the reliability of the presented framework. Back-Up Power Supply; Laplace Domain; Push-Pull Inverter; State Averaging Model; Switching Converter Model 10.4236/CS.2019.101001.
机译：本文介绍了用于中型电力应用的电网连接的紧急备用电源的设计和建模。备用电源在网格停电事件中支持电负载方面非常重要。然而，备用电源的网格集成将持续的电力传输到负载，尤其是临界负载，这不应遭受电力中断。因此，本文提出了基于可靠的电网紧急备用电源的开关转换器的设计和电路建模。还有一个整流器连杆升压导电电池充电电路和4开关推挽式电源逆变器电路，由高频脉冲宽度调制（PWM）信号控制。本文介绍了充电电路的状态平均模型和拉普拉斯域传递函数和功率逆变器电路的开关转换器模型。基于转换继电器的转换开关控制朝向公用事业负载的功率流量。在离网情况下，负载由所提出的逆变器电路和在网格局势期间供电，电池由AC-Link整流馈电转换器充电。然而，存在中继切换电路以控制电池的充电现象。所提出的设计在PLEC中模拟，仿真结果证实了所提出的框架的可靠性。备用电源;拉普拉斯域;推拉逆变器;国家平均模型;交换转换器型号10.4236 / CS.2019.101001。

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  • 来源
    《Circuits and systems》 |2019年第1期|1-19|共19页
  • 作者

    Dhiman Chowdhury; Mohammad Sharif Miah; Md. F. Hossain;

  • 作者单位

    Department of Electrical Engineering University of South Carolina Columbia SC USA;

    Department of Electrical and Electronics Engineering Daffodil International University Dhaka Bangladesh;

    Department of Electrical and Electronics Engineering Daffodil International University Dhaka Bangladesh;

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  • 正文语种 eng
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