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Transmission line insulator online monitoring system
The system is mainly composed of three parts: monitoring extension, communication base station and analysis query system. The monitoring extension is installed on the line tower to monitor the leakage current parameters and environmental parameters in real time.
The QD631 dust detector is an intelligent multifunctional gas detection instrument. The instrument adopts high-performance detection components and computer micro-control technology, combined with advanced SMD technology, and is manufactured with on-site sound, on-site flashing indicator lights and other functions. Real-time display and monitor the dust concentration on site.
The QD631 dust detector can convert the dust concentration signal in the air into an electrical signal for display and remote transmission. It adopts a three-wire 4-20mA or 4-wire RS485 output mode, which has the characteristics of long transmission distance and good anti-interference. QD631 dust detector is suitable for dust concentration detection in industrial environment.
Distributed Intelligent Fault Monitoring System for Transmission Line
System technical indicators
4.1 Technical indicators of the monitoring device
l Power supply mode: Inductive coupling power supply mode, line load current range: 16A～1500A;
Working hours of backup battery: ≥24h;
l Sampling frequency and clock
a) Travelling wave sampling frequency: 10 MHz;
SF6+O3+O2+T+RH气体检测器（JC-DL/1-16）
气体检测器包括六氟化硫检测单元、氧气检测单元、臭氧检测单元、温湿度测量单元和通信单元，对六氟化硫的检测运用超声检测技术克服了使用寿命短、稳定性差等缺点；氧气检测单元采用美国进口传感器，测量精度高、性能稳定；臭氧检测单元采用进口传感器，测量精度高，输出性能稳定，使用寿命长；温湿度测量部分采用数字输出的温湿度模块，具有精度高、重复性好等特点。综上所述，该气体检测器可实时、在线监测环境中SF6气体浓度、氧气含量、臭氧含量以及温湿度的变化，并将检测到的数据通过RS-485总线上传。
Intelligent video early warning system for preventing external damage of power transmission line
The intelligent video early warning system for preventing external force on the transmission line is scientifically designed on the basis of the video monitoring system of the transmission line. The intelligent video analysis technology is integrated and applied to the system. When an external damage is detected on the scene, the on-site voice alarm is immediately activated. System, and at the same time capture and record on-site photos, and transmit alarm information and on-site pictures to the monitoring center through 3G/4G/OPGW and other networks. The management system of the monitoring center automatically sends the alarm information and pictures to related work through SMS/MMS On personnel’s mobile phones, corresponding measures can be taken immediately to prevent the continuation of destructive behaviors and reduce or even eliminate the impact of accidents caused by external damage.
Equivalent icing thickness monitoring device for transmission line
The equivalent icing thickness monitoring device for transmission lines is a high-tech product integrating new sensing technology, electromagnetic compatibility technology, data processing and signal analysis technology, low-power design technology, and network communication technology.
Transmission line online monitoring system
Collect the current actual operating temperature of the wire (fittings), and collect the environmental meteorological parameters in the microclimate area where the wire temperature measurement point is located, including sunshine, wind speed, wind direction, ambient temperature, humidity, rainfall (optional), air pressure (optional), etc., Obtain the operating current data through the data acquisition and monitoring SCADA system, and complete the time synchronization with the wire temperature data;
Calculate the real-time sag of the wire according to the wire temperature and environmental parameters obtained by the test, monitor the operation status of the transmission line in real time, and pre-alarm in multiple ways when abnormal conditions occur;
Using trend analysis method, through the comprehensive analysis of real-time data and historical data, the expected temperature of various wires, the expected current and load of the wires, the expected time, the expected sag and other parameters are carried out.
气体检测器包括六氟化硫检测单元、氧气检测单元、温湿度测量单元和通信单元，对六氟化硫的检测采用红外检测技术，克服了测量误差大、精度差、稳定性差等缺点；氧气检测单元采用德国进口传感器，测量精度高、性能稳定；温湿度测量部分采用数字输出的温湿度模块，具有精度高、重复性好等特点。综上所述，该气体检测器可实时、在线监测环境中SF6气体浓度、氧气含量以及温湿度的变化，并将检测到的数据通过RS-485总线上传。
Transmission line wire (fitting) temperature monitoring device
Transmission line conductor (fitting) temperature monitoring device is based on the theoretical model of the dynamic capacity increase of the transmission line of the conductor operating temperature, starting from the relationship between the conductor temperature and the current-carrying s of the transmission line, and through the remote real-time measurement of the conductor temperature a, Calculate safety performance indicators such as wire sag and determine the degree of danger under the current conveying capacity. The wire temperature acquisition unit adopts high-energy battery power supply, which solves the problems of difficulty in obtaining power online and low safety level.
SF6+O2 gas detector (JC-DL/1-02)
The gas detector includes a sulfur hexafluoride detection unit, an oxygen detection unit, a temperature measurement unit and a communication unit. The use of ultrasonic detection technology for sulfur hexafluoride detection overcomes the shortcomings of short service life and poor stability; the oxygen detection unit adopts imported sensors , The measurement accuracy is high, the performance is stable; the temperature measurement part adopts the temperature module with digital output, which has the characteristics of high accuracy and good repeatability. In summary, the gas detector can monitor the SF6 gas concentration, oxygen content and temperature changes in the environment in real time and online, and upload the detected data through the RS-485 bus.
The water level sensor uses a high-performance pressure-sensing chip, combined with advanced circuit processing and temperature compensation technology, to convert pressure changes into linear current or voltage signals. The product is small in size and easy to install. It uses a stainless steel shell to isolate and anti-corrosion. It is suitable for measuring media such as gases and fluids that are compatible with the material of the contact part. It can be used to measure gauge pressure, negative pressure and absolute pressure.
The water level sensor is based on the prototype of the universal pressure transmitter and is formed by adding a welded sealed isolation diaphragm structure. Its welded and sealed isolation diaphragm device has a variety of different process connection structures, which is especially suitable for pressure measurement in high temperature, high viscosity, crystalline media and easily clogged occasions, and also suitable for water level measurement in power environment, sanitation, and medical occasions.
Cable tunnel online monitoring system
With the development of economy, the high and low voltage lines of cities, industrial and mining and national defense construction gradually realize cable entry, and cable tunnels have gradually become the main method of urban power supply. However, tunnels are not like overhead lines, which can be carried out on the map with the naked eye. Inspection and fault finding require assistance based on science and technology, and a comprehensive online monitoring system for cable tunnels is indispensable
The cable tunnel online monitoring system is mainly composed of two parts: the front-end device and the back-end monitoring and analysis software. The front-end part monitors the cable body and the tunnel environment through sensors, and transmits the monitoring data to the back-end monitoring and analysis center, so that the relevant department staff can check the tunnel The environment is remotely monitored, and if an abnormality occurs, corresponding maintenance measures can be taken timely and accurately
Electric power remote automatic weather station based on Beidou communication
The Beidou satellite signal covers the whole country and is not affected by geographical or terrain
Low communication cost, monthly cost service is available
The communication channel of the Beidou system has extremely high confidentiality, which adapts to the security requirements of the power system
The weather station is designed as an integrated structure, which is light in weight and small in size, easy to install and disassemble, and can be completed quickly by a single person
Ultra-small integrated high-definition outdoor power facility remote monitoring device
Capable of capturing live high-definition photos according to a preset schedule and transmitting the photos to the monitoring center;
It has the function of setting camera parameter resolution, including 800X600, 1280x720, 1280X1024.1600X1200, 2560X1920 and other resolutions;
It has the function of remotely setting the time interval of picture collection; it has the function of remotely changing the IP and port of the center;
Able to receive query time and time calibration commands in the background of the system, and the 24-hour error of the system is no more than 2 seconds; when the communication is abnormal, the picture can be temporarily stored, and after the communication is restored, it can be automatically uploaded to the background
It has the management and self-test functions of the device's own working status including collection, storage, processing, communication, etc., when it is judged that the device has an operating failure, it can initiate corresponding measures to restore the normal operating state of the device; it has the data function of outputting battery voltage, operating temperature, etc. ;
With WeChat push function (optional);
Comply with State Grid Communication Protocol Q/GDW 242-2010 "General Technical Specification for Transmission Line Condition Monitoring Device", State Grid Encrypted Communication Protocol "Transmission 11 Interface Protocol", JINPOWER Custom Protocol, China Southern Power Grid "Southern Power Grid Transmission Line Status Monitoring Communication Protocol ".
BCS-I Transformer DC Bias Monitoring System
my country's AC/DC hybrid transmission mode has gradually formed, which has also led to the problem of mutual interference between AC and DC systems. When the DC line has a single-maximum loop operation, the DC current flowing into the earth through the grounding pole of the DC system will have an impact on the power transformer in the AC power system. The main manifestation is that the neutral point of the transformer flows through the DC and the core is biased. The DC bias causes the transformer vibration to increase, the noise increases, and the harmonics increase.
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