State Grid Hubei Marketing Service Center (measurement Center)

State Grid Hubei Electric Power Co., Ltd. Measurement Center

He Yu

Li Ding

Xin Zheng

Wei Wei

Jun Li

Xin Wang

Li Li

Tao Peng

Tian Xia

Xianjin Rong

Linghua Li

Dengping Tang

Hong Shi

Bo Pang

Fan Li

Sike Wang

Ming Lei

Lihua Yang

Juan Qiu

Yi Fang

Xuxiang Wang

Wenjing Yu

Ben Ma

Shuibin Xia

Yingchun Wang

Dongri Xie

The present disclosure provides a direct current (DC) transformer error detection apparatus for a pulsating harmonic signal, including a DC and pulsating harmonic current output module and an external detected input module, where the DC and pulsating harmonic current output module outputs a DC and a DC superimposed pulsating harmonic current to an internal sampling circuit and a self-calibrated standard resistor array; and the internal sampling circuit converts the input DC and the input DC superimposed pulsating harmonic current into a voltage signal, and sends the voltage signal to an analog-to-digital (AD) sampling and measurement component through a front-end conditioning circuit and a detected input channel. The DC transformer error detection apparatus can complete self-calibration for measurement of the DC and the pulsating harmonic signal on a test site.

Direct current (DC) transformer error detection apparatus for pulsating harmonic signal

Disclosed are a non-to-the-home type device and method for detecting electric meter misconnection based on the PLC communication technology and using multiple frequencies. The detection device includes a master detection device and a slave detection device. The master detection device acquires address information of different electric meters at the outlet terminals of the electric meters by using RS485 communication. The modulation circuit modulates the communication address information of different electric meters into high-frequency carrier signals of different frequencies, and sends the high-frequency carrier signals to user sides by using the PLC communication technology. A line trap is provided between the modulation circuit and the electric meters. The slave detection device has a high-frequency carrier signal detection antenna. The user side detects the high-frequency carrier signal, demodulates the high-frequency carrier signal to obtain the high-frequency carrier signal frequency and the communication address information of the electric meter corresponding to user.

Device and method for detecting misconnection of electric meters

Growing community of inventors

Hubei, China

He Yu