The current passing through the zinc oxide resistor is called the leakage current of the zinc oxide arrester, and is also regarded as the total leakage current of the arrester. In principle, the smaller the better. Leakage current can reflect the insulation of the arrester and is an important means to judge the quality of the arrester under the operating voltage. For this reason, the wireless arrester leakage current sensor we developed is an online lightning arrester leakage current monitoring device based on a wireless sensor network designed for the above problems existing in the arrester. It uses wireless Internet of Things technology for online monitoring, which greatly reduces the amount of labor and fills the gap that the current resistive current cannot be monitored online in real time. The equipment complies with the "☆Power Equipment Wireless Sensor Network Node Networking Protocol", which improves the reliability of data transmission and good environmental adaptability.
The Internet of Things lightning arrester online monitoring device, the intelligent online monitoring IED and the state monitoring integrated server together form the Internet of Things lightning arrester online monitoring system. The lightning arrester monitoring adopts a wireless remote transmission monitor to realize a fully isolated sampling method without residual voltage. The lightning arrester is used to obtain energy and power supply. The collected current is converted into a voltage signal and then entered into the wireless sending module, and the measurement result is transmitted wirelessly The data acquisition device IED, the device will receive the voltage signal through the wireless receiving module, and then enter the signal conditioning circuit, and use a unique expert diagnosis system to scientifically analyze and diagnose the collected data, and then analyze whether the state of the arrester is normal and faulty species. Timely and conveniently understand and grasp the health status of substation equipment. Through real-time monitoring of the lightning arrester's leakage current and the number of lightning strikes, the monitored data is analyzed, fitted and processed, and combined with the on-site working conditions, the leakage current of the porcelain sleeve or the leakage current of the insulating rod caused by the pollution or internal moisture of the arrester can be found in time Increase and other issues to avoid accidents.
JC-OM200A transmission line lightning arrester online monitoring system (hereinafter referred to as this system) is a new high-tech product developed by our company for the needs of the power system. The current detection of the system adopts a single-turn through-core current sensor to achieve full isolation () sampling method without residual voltage, advanced microprocessor technology and unique transient parameter testing technology for linearization and calculation, and the measurement results Digital wireless transmission via GPRS/GSM: The system has extremely high reliability and safety and relatively low price, so that the system can be installed in each group of MOA arresters for real-time detection, realize centralized monitoring, and effectively improve the performance of line arresters. The inspection efficiency reduces the labor intensity of the inspectors. Achieve accurate and timely grasp of the health status of operating equipment, so that operators can grasp and deal with potential accidents in advance, and ensure the safe power supply of the power grid.
Function introduction: MOA current monitor is mainly used for real-time and online monitoring of the full current, discharge current and cumulative action times of MOA arresters. The MOA current monitor adopts a current sampling method with no residual voltage and full isolation, which is mainly composed of a current transformer, A/D conversion, single-chip microcomputer and RS485 communication module. The current transformer is a single-turn primary through-core current transformer, and the measurement result is used The bus is used for transmission. The MOA current monitor adopts advanced compensation technology, so it has good versatility and interchangeable measurement.
The JC-OM201 transformer core/clamp grounding online monitoring system consists of the JC-OM201 transformer core/clip grounding monitoring device and the JC-8000 integrated intelligent online monitoring device.
The JC-OM301 fiber grating temperature online monitoring system is mainly composed of fiber grating sensor, transmission cable, fiber grating intelligent demodulator and computer. The fiber grating sensor is installed on the surface of the measured point to realize the signal collection; then the signal is transmitted to the fiber grating intelligent demodulator through the optical cable. The optical fiber grating intelligent demodulator transmits the signal to the computer through the Ethernet port after analysis, and the computer system implements data processing, fault diagnosis, alarm and control, etc.
The distributed optical fiber temperature measurement system uses the spontaneous Raman scattering signal and optical time domain reflection (OTDR) principle generated when light is transmitted in the optical fiber to obtain spatial temperature distribution information, which is dedicated to online temperature monitoring of power cables, tunnels, and subways. . A system that uses one (or more) ordinary optical fibers and one terminal device to measure the temperature of up to several thousand points within a range of several kilometers is realized.
The JC-OM500 SF6 gas micro-water density online monitoring system is a key project established by the company in accordance with the development requirements of the national smart grid. This series of products adopts the latest telemetry and remote sensing technology and background computer technology in one, compact appearance, can achieve high-precision measurement, Computer background processing, massive historical data storage and other functions, suitable for on-line measurement of water, density and temperature of SF6 gas of various voltage levels of SF6 circuit breakers, GIS, AIS and other equipment, to achieve no emissions, environmental protection, safety, and real-time , Remote and other advanced dynamic monitoring to meet the needs of power distribution network automation and equipment status maintenance, and to reserve interfaces for the intelligent construction of the power grid. This series of products has advanced technology, filled the domestic gap, and obtained a number of patents.
The JC-OM200 arrester online monitoring device realizes the monitoring of the insulation performance of the metal zinc oxide arrester. The online monitoring of the arrester requires two devices: the JC-OM200 arrester online monitoring device and the JC-OM200/PT bus voltage online monitoring device, which can monitor the full current of the arrester in real time. , Resistive current, capacitive current, number of lightning strikes, lightning strike time, through analysis and fitting processing of the monitored data, combined with the on-site working conditions, the leakage current of the porcelain sleeve caused by the pollution or internal moisture of the arrester can be found in time Or increase the leakage current of the insulating rod to avoid accidents.
J CD L/1 SF 6 gas concentration online monitoring and alarm system (hereinafter referred to as this system) is a high-tech new high-tech developed by our company for the personal protection needs of indoor staff in SF 6 switch room, combined electrical appliance (GIS) room, etc. product. This system adopts original imported sensors, combined with the powerful control capability of C P U, can monitor the concentration of SF 6 gas, oxygen content and ambient temperature and humidity online in real time, and use the bus for digital transmission of the measurement results. It can accurately and timely grasp the status of the operating equipment, and also control the exhaust air of the fan.