This paper develops a novel distributed temperature measurement system based on DSP and DS18B20 digital thermometer. The real-time temperature of each node in the switchgear is obtained by several DS18B20s which are c...This paper develops a novel distributed temperature measurement system based on DSP and DS18B20 digital thermometer. The real-time temperature of each node in the switchgear is obtained by several DS18B20s which are connected on the 1-wire bus together. RS-485 master-slave communication protocol is used to centralize monitoring temperatures of several switchgear cabinets. The system also has the function of temperature alarm. The operation of simulation experiment has showed that the system is able to complete monitoring real-time temperatures in high voltage switchgear.展开更多
针对中压配电网缺少实时量测、伪量测精度较低以及现有的动态状态估计(dynamic state estimation,DSE)方法均采用恒定系统处理状态过程噪声的问题,提出了一种基于改进自适应无迹卡尔曼滤波(unscented kalman filter,UKF)算法的中压配电...针对中压配电网缺少实时量测、伪量测精度较低以及现有的动态状态估计(dynamic state estimation,DSE)方法均采用恒定系统处理状态过程噪声的问题,提出了一种基于改进自适应无迹卡尔曼滤波(unscented kalman filter,UKF)算法的中压配电网鲁棒DSE方法。首先,利用中压配电网变压器低压侧的智能电表量测和变压器模型,推导出等效中压量测以增强中压配网量测冗余度;然后,借鉴信号处理技术对系统状态过程噪声的协方差矩阵实时更新并融入UKF算法,以减轻状态预测和量测滤波的不确定性;最后,基于15节点中压配电网进行仿真。仿真结果表明:所提方法能够有效地进行中压配电网的动态状态估计,获取更为精确的态势感知信息。展开更多
文摘This paper develops a novel distributed temperature measurement system based on DSP and DS18B20 digital thermometer. The real-time temperature of each node in the switchgear is obtained by several DS18B20s which are connected on the 1-wire bus together. RS-485 master-slave communication protocol is used to centralize monitoring temperatures of several switchgear cabinets. The system also has the function of temperature alarm. The operation of simulation experiment has showed that the system is able to complete monitoring real-time temperatures in high voltage switchgear.
文摘针对中压配电网缺少实时量测、伪量测精度较低以及现有的动态状态估计(dynamic state estimation,DSE)方法均采用恒定系统处理状态过程噪声的问题,提出了一种基于改进自适应无迹卡尔曼滤波(unscented kalman filter,UKF)算法的中压配电网鲁棒DSE方法。首先,利用中压配电网变压器低压侧的智能电表量测和变压器模型,推导出等效中压量测以增强中压配网量测冗余度;然后,借鉴信号处理技术对系统状态过程噪声的协方差矩阵实时更新并融入UKF算法,以减轻状态预测和量测滤波的不确定性;最后,基于15节点中压配电网进行仿真。仿真结果表明:所提方法能够有效地进行中压配电网的动态状态估计,获取更为精确的态势感知信息。