在现代电力系统中,配网低电压问题常由多种因素引起,包括不平衡负荷、过长的供电距离或设备老化等。这些问题不仅影响电能质量,而且会降低用户满意度和电网运行效率。而智能电表的广泛部署为实时监控和管理配网提供了新的可能。文章深...在现代电力系统中,配网低电压问题常由多种因素引起,包括不平衡负荷、过长的供电距离或设备老化等。这些问题不仅影响电能质量,而且会降低用户满意度和电网运行效率。而智能电表的广泛部署为实时监控和管理配网提供了新的可能。文章深入探讨基于智能电表高速电力线载波(High-speed Power Line Carrier,HPLC)模块96点数据的配网低电压治理方法,根据自动识别和分类低电压问题,开发数据驱动的电压调节策略,并结合预测模型和预防措施,提出一套综合治理方案。然后,通过系统测试,验证所提方法的有效性和实用性。展开更多
This paper proposes the design and development of a novel, portable and low-cost intelligent electronic device (IED) for real-time monitoring of high frequency phenomena in CENELEC PLC band. A high speed floating-poin...This paper proposes the design and development of a novel, portable and low-cost intelligent electronic device (IED) for real-time monitoring of high frequency phenomena in CENELEC PLC band. A high speed floating-point digital signal processor (DSP) along with 4 MSPS analog-to-digital converter (ADC) is used to develop the intelligent electronic device. An optimized algorithm to process the analog signal in real-time and to extract the meaningful result using signal processing techniques has been implemented on the device. A laboratory environment has setup with all the necessary equipment including the development of the load model to evaluate the performance of the IED. Smart meter and concentrator is also connected to the low voltage (LV) network to monitor the PLC communication using the IED. The device has been tested in the laboratory and it has produced very promising results for time domain as well as frequency domain analysis. Those results imply that the IED is fully capable of monitoring high frequency disturbances in CENELEC PLC band.展开更多
传统的通信信号调制识别方法容易出现过拟合或欠拟合等问题,导致识别结果误差率较高。为了降低误差率、提高准确率,提出基于改进蚁群算法的高速电力线载波(High-speed Power Line Carrier,HPLC)通信信号调制识别方法。先通过计算幅度谱...传统的通信信号调制识别方法容易出现过拟合或欠拟合等问题,导致识别结果误差率较高。为了降低误差率、提高准确率,提出基于改进蚁群算法的高速电力线载波(High-speed Power Line Carrier,HPLC)通信信号调制识别方法。先通过计算幅度谱密度最大值、相位绝对值的标准偏差、频率绝对值的标准偏差,提取通信信号的特征参数,然后基于改进蚁群算法构建信号调制识别模型,实现HPLC通信信号的调制识别。设计对比实验,实验结果证明该方法在对通信信号调制识别准确率的提升方面具有显著效果,更符合实际的数字信号识别需要。在实际应用中,该方法可以广泛应用于各种需要快速、准确识别通信信号的领域。展开更多
文摘在现代电力系统中,配网低电压问题常由多种因素引起,包括不平衡负荷、过长的供电距离或设备老化等。这些问题不仅影响电能质量,而且会降低用户满意度和电网运行效率。而智能电表的广泛部署为实时监控和管理配网提供了新的可能。文章深入探讨基于智能电表高速电力线载波(High-speed Power Line Carrier,HPLC)模块96点数据的配网低电压治理方法,根据自动识别和分类低电压问题,开发数据驱动的电压调节策略,并结合预测模型和预防措施,提出一套综合治理方案。然后,通过系统测试,验证所提方法的有效性和实用性。
文摘This paper proposes the design and development of a novel, portable and low-cost intelligent electronic device (IED) for real-time monitoring of high frequency phenomena in CENELEC PLC band. A high speed floating-point digital signal processor (DSP) along with 4 MSPS analog-to-digital converter (ADC) is used to develop the intelligent electronic device. An optimized algorithm to process the analog signal in real-time and to extract the meaningful result using signal processing techniques has been implemented on the device. A laboratory environment has setup with all the necessary equipment including the development of the load model to evaluate the performance of the IED. Smart meter and concentrator is also connected to the low voltage (LV) network to monitor the PLC communication using the IED. The device has been tested in the laboratory and it has produced very promising results for time domain as well as frequency domain analysis. Those results imply that the IED is fully capable of monitoring high frequency disturbances in CENELEC PLC band.
文摘传统的通信信号调制识别方法容易出现过拟合或欠拟合等问题,导致识别结果误差率较高。为了降低误差率、提高准确率,提出基于改进蚁群算法的高速电力线载波(High-speed Power Line Carrier,HPLC)通信信号调制识别方法。先通过计算幅度谱密度最大值、相位绝对值的标准偏差、频率绝对值的标准偏差,提取通信信号的特征参数,然后基于改进蚁群算法构建信号调制识别模型,实现HPLC通信信号的调制识别。设计对比实验,实验结果证明该方法在对通信信号调制识别准确率的提升方面具有显著效果,更符合实际的数字信号识别需要。在实际应用中,该方法可以广泛应用于各种需要快速、准确识别通信信号的领域。
