Intelligent comprehensive monitoring system for power distribution room

For a long time, the management of power distribution rooms has been one of the weak links in the reliability of power supply system operation and management. Some power distribution room switches trip and the environment in the power distribution room overheats, affecting equipment operation, equipment damage caused by water immersion in the power distribution room, and equipment theft in the power distribution room. These faults are easy to burn out equipment and also affect the normal power consumption of users, but they are often overlooked by people. However, over the years, due to the lack of detection methods for low-voltage distribution networks, it has been common for staff to measure and inspect each distribution device one by one on several typical days each year or quarter. As a result, it is time-consuming and labor-intensive, unable to reflect the real situation in a timely manner or solve practical problems in a timely manner. Therefore, it is necessary to develop and promote monitoring devices for distribution networks.

System Cloud Platform Interface

Manage relevant business processes through web client applications, click on the map to select any subordinate electrical room within the jurisdiction area, and display real-time monitoring data of the electrical room in a graphical manner, providing control buttons and operation warnings. After adding an external gateway or using an internal network mobile card, the alarm function can be sent to the relevant management personnel's external mobile terminals or phones.

system function

Ø Implement the following subsystem functions for environmental monitoring

1) Temperature and humidity monitoring subsystem

2) Waterproof immersion monitoring subsystem

3) Gas monitoring subsystem

4) Gate access control and human infrared intervention subsystem

5) Smoke and fire detection subsystem

6) Fixed high-definition camera and high-definition ball monitoring recording and playback subsystem

Ø Function of equipment status monitoring subsystem

1) Temperature detection of switchgear and transformers

2) Partial discharge (omnidirectional ultra-high frequency) monitoring subsystem function

3) Partial discharge (pulse current) monitoring subsystem function

Ø Equipment status monitoring AI function

1) Implement the function of monitoring the position of the switchgear knife switch, SF6 pressure pointer position, fault indicator status, and status indicator status through visual AI algorithms

Environmental monitoring system

The environmental monitoring system is a computer network that comprehensively utilizes computer network technology, database technology, advanced communication technology, automatic control technology, new sensing technology, etc. Its monitoring object is the comprehensive environment (including security) in the distribution room. The monitoring system aims to fully utilize human resources, strengthen maintenance support measures, ensure stable equipment operation and substation safety, improve labor productivity and equipment operation and maintenance level, and achieve the management requirements of "data integration, business collaboration, centralized management, and resource sharing".

Temperature and humidity transmitter	access control	Video monitoring	Water Level Control	New air integrated machine
	Environmental monitoring system host
Gas transmitter				fan control
SF6/O2 transmitter				air-conditioning control
Lighting control	audible and visual alarm	Fire Alarm	Infrared anti-theft monitoring	Dehumidification control

Equipment monitoring system

Temperature monitoring of switchgear and transformers

The wireless temperature monitoring system has extremely high reliability and safety, and is inexpensive. It can be directly installed on every high-voltage switch, bus joint, outdoor knife switch or transformer. The system is equipped with standard communication interfaces and can run online. Real time operating temperature data of high-voltage equipment can be recorded through the upper computer software. Accumulated data is provided for the maintenance of high-voltage equipment, realizing the prediction and maintenance of thermal faults in high-voltage equipment.

Temperature measurement collector

The wireless temperature collector is a field temperature monitoring device that integrates monitoring of the working status of temperature sensors, on-site temperature display, alarm prompts and outputs, event recording, and data recording. It can also modify the address and other parameters of the on-site wireless temperature sensor.

Temperature sensor

Wireless temperature sensor (active)

Technical indicators:

Ø  Temperature measurement range: -25 to+200 ℃

Ø  Measurement accuracy: ± 1 ℃ (0~75 ℃), ± 2 ℃ (-20~150 ℃)

Ø  Temperature sampling frequency: default 1 minute

Ø  Wireless frequency: 2.4GHz/433MHz

Ø  Wireless transmission distance: ≤ 10 meters (2.4GHz)/≤ 200 meters (433MHz)

Ø  Battery life: 8 years

Ø  Installation method: bundled

Ø  Dimensions: Main body dimensions: 38mm * 35mm * 24mm, total strap length: 385mm

Wireless temperature sensor (passive)

Technical indicators:

Ø  Temperature measurement range: -25 to+200 ℃

Ø  Measurement accuracy: ± 1 ℃ (0~75 ℃), ± 2 ℃ (-20~150 ℃)

Ø  Temperature sampling frequency: default 10 seconds

Ø  Wireless frequency: 2.4GHz/433MHz

Ø  Wireless transmission distance: ≤ 10 meters (2.4GHz)/≤ 200 meters (433MHz)

Ø  Working power supply: induction power supply

Ø  Starting current:> 5A

Ø  Installation method: bundled

Ø  Dimensions: Main body dimensions: 46mm * 35mm * 21mm, total strap length: 380mm

Transformer adsorption temperature sensor (outdoor)

Technical indicators:

Ø  Temperature measurement range: -25 to+200 ℃

Ø  Measurement accuracy: ≤± 1 ℃

Ø  Temperature sampling frequency: When the change is ≤ 2 ℃, send once every 5 minutes;

          When the temperature changes by more than 2 ℃, send once every minute,

Ø  Wireless frequency: 433MHz

Ø  Wireless transmission distance: ≤ 200 meters

Ø  Battery life: 8 years

Ø  Installation method: adsorption type

Ø  Main body size: 60mm * 45mm * 25mm, total length: 105mm

Ø  Installation method: adsorption type

Partial discharge system

The partial discharge monitoring system mainly monitors the partial discharge of switchgear and ring main unit in the 66kV and below distribution network system. The system integrates the monitoring of partial discharge of switchgear inside the cabinet, temperature measurement, display, signal alarm and other functions to achieve effective monitoring of the operation status of distribution equipment by users. By using flexible installation methods, the on-site problems of complex structure, harsh operating environment, and ever-changing defect types of the monitored equipment can be solved. Through big data technology, the "qualitative, quantitative, positioning, and phased" requirements for live equipment detection can be addressed. Economically and effectively solving the problems of state monitoring and defect diagnosis plays an extremely important role in the safe and reliable operation of distribution equipment and the emergency repair decisions of power enterprises.

Partial discharge collector

Functional Features

Ø  Insulation status monitoring and temperature monitoring functions

Ø  Partial discharge detection technology based on ultra-high frequency method

Ø  Contact temperature measurement provides more accurate and reliable temperature monitoring data

Ø  Design of temperature sensor based on wireless transmission technology, easy to install

Ø  Adaptive anti-interference technology can effectively identify interference signals

Ø  Continuous real-time monitoring curves can accurately grasp the trend of equipment status

Ø  The historical fault query function allows for quick monthly and sequential queries of fault history records

Technical indicators:

Ø  Function configuration: Insulation monitoring, temperature monitoring

Ø  Power supply voltage: 220V, 85V~265V, AC

             220V，120V~380V，DC

Ø  Power supply: 10W

Ø  Dimensions: 244 × 178 × 55 (mm)

Ø  On site display: 7.0-inch color LCD, 24K colors, 800 × 480 dot matrix, touch screen

Ø  Alarm output: 220VAC/3A (rated load), 30VDC/3A (rated load)

Ø  Contact type: a set of conversion contacts

Local sensors

Ultra high frequency partial discharge sensor

Technical indicators:

Ø  Working frequency range: 500MHz~3GHz

Ø  Matching impedance:50 Ω

Ø  Measurement range:0 dBmV~70dBmV

Ø  Measurement accuracy:-60dBm（=0.001μW）

Ø  Antenna size:126×126×25（mm）

Pulse current partial discharge sensor

Technical indicators:

Ø  Measurement range: 100-5000pC

Ø  Toad belt range: 100kHz-5MHz

Ø  Monitoring variables: discharge intensity, discharge limit, average intensity

Ø  Discharge limit: not exceeding 9000 (1S)

Ø  Alarm output: 220VAC/3A (rated load); 30VDC/3A (rated load)

Ø  Contact type: a set of conversion contacts

Typical Configuration List

Description: This system is compatible with the access of intelligent inspection robots