针对电容式电压互感器(Capacitor Voltage Transformers,CVT)应用于谐波测量的需求,提出一种CVT谐波电压测量校正装置的设计方案。通过研究CVT主电容参数波动与谐波传变的关系,运用双线插值算法实现对校正系数的求解;通过考虑现实需求...针对电容式电压互感器(Capacitor Voltage Transformers,CVT)应用于谐波测量的需求,提出一种CVT谐波电压测量校正装置的设计方案。通过研究CVT主电容参数波动与谐波传变的关系,运用双线插值算法实现对校正系数的求解;通过考虑现实需求以及运行效率,提出了采样频率和采样长度的计算方法。以STM32F407为控制处理核心,实现对系统的综合管理。该装置对CVT谐波测量的校正性能已通过实验数据得以验证。此外,该装置还具有安装方便、通用程度高的特点。展开更多
Static, passive, filters present an economic and simple solution to the harmonic distortion at the distribution level and at the same time supply the required reactive power for voltage support and/or power factor cor...Static, passive, filters present an economic and simple solution to the harmonic distortion at the distribution level and at the same time supply the required reactive power for voltage support and/or power factor correction. Applying these filters to a distribution network, if not properly designed, may have an adverse effect on the network. This paper presents analysis of the effects of using passive harmonic filters in a power distribution networks. The driving point impedance at the node where the filter installed, as a measure of how harmonic currents would produce harmonic voltages, is determined as function of the filter parameters. Hence, effects of filter parameters on the system impedance, parallel resonant frequency and impedance at resonance are illustrated. The effects of using more than one filter are also examined. A method for the optimal design of a passive filter considering the component limits, harmonic distortion limits and parameter tolerances is also presented. The proposed optimization model has proved its effectiveness through application to measurements at a real distribution feeder.展开更多
This paper investigates the usage of passive harmonic filters to mitigate harmonic distortions when two resonant points are present in a system caused by shunt capacitors used for power factor correction and bus volta...This paper investigates the usage of passive harmonic filters to mitigate harmonic distortions when two resonant points are present in a system caused by shunt capacitors used for power factor correction and bus voltage regulation. Six scenarios were investigated using DIgSILENT 14 power factor）＇ software. The investigations are with and without power factor correction and capacitors used to increase bus voltage. Passive harmonic filters are designed to reduce harmonic distortions at the PCC （point of common coupling） to fall within the IEEE 519 harmonic voltage and current limits caused by parallel resonance. The results of the case studies are analysed to evaluate the effectiveness of the filter design.展开更多
文摘针对电容式电压互感器(Capacitor Voltage Transformers,CVT)应用于谐波测量的需求,提出一种CVT谐波电压测量校正装置的设计方案。通过研究CVT主电容参数波动与谐波传变的关系,运用双线插值算法实现对校正系数的求解;通过考虑现实需求以及运行效率,提出了采样频率和采样长度的计算方法。以STM32F407为控制处理核心,实现对系统的综合管理。该装置对CVT谐波测量的校正性能已通过实验数据得以验证。此外,该装置还具有安装方便、通用程度高的特点。
文摘Static, passive, filters present an economic and simple solution to the harmonic distortion at the distribution level and at the same time supply the required reactive power for voltage support and/or power factor correction. Applying these filters to a distribution network, if not properly designed, may have an adverse effect on the network. This paper presents analysis of the effects of using passive harmonic filters in a power distribution networks. The driving point impedance at the node where the filter installed, as a measure of how harmonic currents would produce harmonic voltages, is determined as function of the filter parameters. Hence, effects of filter parameters on the system impedance, parallel resonant frequency and impedance at resonance are illustrated. The effects of using more than one filter are also examined. A method for the optimal design of a passive filter considering the component limits, harmonic distortion limits and parameter tolerances is also presented. The proposed optimization model has proved its effectiveness through application to measurements at a real distribution feeder.
文摘This paper investigates the usage of passive harmonic filters to mitigate harmonic distortions when two resonant points are present in a system caused by shunt capacitors used for power factor correction and bus voltage regulation. Six scenarios were investigated using DIgSILENT 14 power factor）＇ software. The investigations are with and without power factor correction and capacitors used to increase bus voltage. Passive harmonic filters are designed to reduce harmonic distortions at the PCC （point of common coupling） to fall within the IEEE 519 harmonic voltage and current limits caused by parallel resonance. The results of the case studies are analysed to evaluate the effectiveness of the filter design.
