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首页> 外文会议>2016 COES annual conference proceedings >Wide-bandwidth Identification of Small-Signal dq Impedances of ac Power Systems via Single-Phase Series Voltage Injection
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Wide-bandwidth Identification of Small-Signal dq Impedances of ac Power Systems via Single-Phase Series Voltage Injection

机译：通过单相串联电压注入宽带识别交流电源系统的小信号dq阻抗

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摘要

The injection of single-phase wide-bandwidth signals into three-phase ac power systems significantlyrnreduces measurement time using the hardware with minimized number of components. Interleavedrntransformer-less H-bridge converter is optimized to operate as a series voltage injector, increasing thernlow frequency injection range by avoiding transformer saturation problems. The decoupling control isrnimplemented, providing the effective way to balance dc capacitor voltages and regulate the seriesrninjection voltage. The modular and scalable single-phase impedance measurement unit (IMU) isrndesigned and constructed to inject chirp, multi-tone and sinusoidal signals in series with the three-phasernac power systems. The measurement system is designed to inject all three types of signals in the fullrnfrequency range, offering a trade-off between measurement time, identification process precision, andrnnumber of identification points. The effectiveness of the proposed identification approach is verifiedrnwith the online estimation of source and load impedances of actively controlled programmable voltagernsource and a three-phase resistive load.
机译：使用具有最少组件数量的硬件，将单相宽带信号注入三相交流电源系统中可显着减少测量时间。无交错式无变压器H桥转换器经过优化，可作为串联电压注入器使用，通过避免变压器饱和问题来增加低频注入范围。实现了去耦控制，为平衡直流电容器电压和调节串联注入电压提供了有效的方法。设计并构建了模块化且可扩展的单相阻抗测量单元（IMU），以与三相rnac电力系统串联注入线性调频，多音和正弦信号。测量系统设计为在全频率范围内注入所有三种类型的信号，从而在测量时间，识别过程精度和识别点数量之间进行权衡。在线估计主动控制的可编程电压源和三相电阻性负载的源阻抗和负载阻抗，验证了所提出识别方法的有效性。

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