Power cable multi-state online monitoring system
The cable is a facility with a high probability of failure of the cable network. The signal of the sensor coupling cable grounding wire, the partial discharge of the sensor to the cable joint and the distributed optical fiber temperature measurement system are used to monitor the cable and collect the ground current collected. The parameters, partial discharge parameters and cable temperature parameters are transmitted to the monitoring center to analyze and evaluate the operating status of the cable to realize the monitoring of the operating status of the cable from time to time, so as to provide a powerful guarantee for the power sector to effectively prevent accidents and disasters.
Point-type optical fiber temperature sensing system
The point-type optical fiber temperature sensing system uses the principle of fluorescence detection to monitor temperature information through optical fibers. It is suitable for temperature sensing monitoring in areas with high temperature monitoring accuracy and narrow spaces, such as switch cabinet contacts, motor stators, transformer windings, etc. Most of these monitored equipment have relatively harsh electrical environmental conditions (electromagnetic field radiation, surges, electrical pulses and other electromagnetic interference), and optical fibers have the characteristics of electrical insulation, intrinsic safety, and immunity to electromagnetic interference, so the probe of the optical fiber sensor can be directly It is installed on the measured point in a contact manner, and monitors the temperature of these devices at "zero distance" to ensure real-time and accurate temperature detection.
JC-OM400L Tunnel Cable Partial Discharge Monitoring System
The JC-OM400D cable partial discharge online monitoring system adopts a modular design scheme. The partial discharge pulse current signal at the cable body and the joint is coupled through the high-frequency pulse current sensor installed on the ground wire of the cable joint; the coupled pulse current The signal is transmitted to the front-end monitoring collector through the coaxial cable, and the analog signal is amplified, filtered, and converted into a digital signal, and then transmitted to the back-end server through the optical fiber. The background server performs classification, identification, analysis, and calculation on the signals of all sensors, and writes the discharge information data obtained through calculation into the database, and displays the monitoring results on the software of the monitoring system.
Distributed comprehensive monitoring and evaluation system for power cable status
This system is suitable for comprehensive monitoring of the operating status of power cables of 110KV and above, supports GPRS network, provides real-time monitoring data to maintenance personnel, reduces the workload of inspection personnel, and achieves early warning for long-term changes in monitoring points. Prevent emergencies from happening. Real-time understanding of the operating status of the high-voltage cable, by monitoring the partial discharge of the cable, the circulating current of the cable's high-voltage sheath, and the cable optical fiber temperature measurement system (DTS), and on this basis, the real-time core current carrying capacity is analyzed, and the operating status of the cable is monitored. Provide reliable data for maintenance personnel. Through GPRS, CDMA and other wireless transmission methods, the relevant data such as partial discharge, temperature and circulation are transmitted to the back-end server, and then forwarded to the handheld terminal through the server, so that the operation and maintenance personnel can keep abreast of the operation of the cable at any time. Through the three aspects of data, more Effectively judge the running status of the cable.
Cable dynamic current-carrying capacity real-time analysis system (10kV and above)
The system uses the thermal network method based on Ohm's law of the heat flow field to calculate the current carrying capacity of the cable. The concept is clear and easy to understand and master. It can not only be used to solve the thermal field of the cable, but also can be used to obtain the cable conductor temperature in the case of monitoring the surface temperature of the cable, or calculate the ambient temperature at this time according to the actual load and surface temperature of the cable, so as to obtain the current environment The rated load of the cable under the conditions. The use of this software for cable selection calculation and operation verification is convenient, fast and accurate. It not only saves a lot of time for cable selection and maintenance personnel, but also provides a reliable basis to make the selection and control of the cable operation status more accurate , It is also very helpful to the evaluation of the operating life of the cable.
Cable sheath circulation monitoring system
The high-voltage cable grounding circulation monitoring system is composed of a signal monitoring unit, a data communication unit, and a local sensor unit. It completes the environmental temperature and humidity detection of the high-voltage cable grounding circulation and the grounding box, and transmits the data to the local monitoring panel through the RS485/IEC61850 communication module. The monitoring terminal uses advanced measurement circuits, high-speed MCUs, and stable and reliable sensors to achieve accurate measurement of monitoring signals and reliable data transmission.
FH-900L Cable Cloud Control Intelligent Integrated Monitoring System
The monitoring device equipped with this system adopts CT induction power supply mode for power supply, which is easy to install. After being put into operation, it can independently monitor the grounding wire circulation, cable (joint) temperature, cable vibration and other data, and at the same time send the data to the remote monitoring center. Once the data is found to be abnormal, the monitoring center will notify relevant personnel to deal with it in a timely manner through warning lights, siren, SMS, WeChat, etc.
Automatic cable fault location and circulation monitoring system
The automatic cable fault location and circulating current monitoring system implements online monitoring for ultra-high voltage cable lines with voltage levels of 110kV and above to realize automatic location of ultra-high voltage cable faults. In addition, the system monitors the circulating current value of the metal shielding layer of the cable in real time, can draw the cable circulating current curve, and alarm the abnormal circulating current cable to realize the online monitoring of the cable sheath insulation. The positioning accuracy of the system is not affected by factors such as line fault location, fault type, line length, grounding resistance, etc. The monitoring data is reported to the host computer through optical fiber communication, and the location of the fault point is determined by the host computer analysis software, which shortens the user's fault diagnosis time and Time to restore line power
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