Extending the Power Capability With Dynamic Performance of a Power-Hardware-in-the-Loop Application—Power Grid Emulator Using “Inverter Cumulation”
Extending the Power Capability With Dynamic Performance of a Power-Hardware-in-the-Loop Application—Power Grid Emulator Using “Inverter Cumulation”
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DOI：
10.1109/tia.2016.2539918
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发表时间：
2016-03
影响因子：
4.4
通讯作者：
Guangye Si;J. Cordier;R. Kennel
中科院分区：
文献类型：
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作者：
Guangye Si;J. Cordier;R. Kennel
在公共交通或分布式电力系统等安全关键应用中，越来越多地使用复杂的并网技术组件，需要在开发过程中对这些设备的可靠性和稳健性进行精确评估。对大功率系统的直接现场测试通常是不可能的。解决这一问题的一种传统方法是使用基于软件的仿真来分析在试电力设备在电网正常和暂态运行条件下的行为。然而，信号级模拟不能完美地再现物理现象的每一个细节。本出版物描述了一种具有成本效益的电力硬件在环（PHiL）电网仿真系统，该系统结合了两个具有不同电气特性（半导体类型，开关频率，直流链路等）的逆变器。所提出的电网仿真器是一种可控电源，不仅能够模拟低频（50 Hz）暂态故障作为电压跌落，而且能够模拟通常存在于公用电网电压波形中的高阶谐波分量（例如噪声）。一个缩小的5kva实验室样机已经实现，实验结果表明，该仿真器具有高功率和高动态相结合的能力。
The increasing use of complex grid-connected technological components in safety-critical applications like public transportation or distributed power systems requires a precise evaluation of the reliability and robustness of these pieces of equipment during their development. Direct on-field tests of high-power systems are generally not possible. A conventional method of getting around this problem consists in using software-based simulation to analyze the behavior of the electric equipment under test (EUT) under normal and transient operation conditions of the grid. However, signal-level simulation is not able to perfectly reproduce every detail of a physical phenomenon. This publication describes a cost-effective realization of a power-hardware-in-the-loop (PHiL) grid emulation system combining two inverters with different electrical characteristics (type of semiconductor, switching frequency, dc link, etc.). The proposed grid emulator is a controllable power source not only capable of emulating low-frequency (50 Hz) transient faults as voltage sags but also high-order harmonic components usually present in the voltage waveforms of the utility grid (e.g., noise). A downscaled 5-kVA laboratory prototype has been implemented and the experimental results shown in this paper demonstrate the emulator's ability to combine high power with high dynamics.