1. Reasons for the demand for thermal camera in the electric power industry

With the use of distribution substation system, the system load and system fault will increase continuously due to internal fault and external fault. External failures mainly include heating caused by the increase of contact resistance caused by oxidative looseness of electrical switch contacts of equipment, cables and bus joints, which is characterized by high heating on the external surface and easy to be found by surface temperature measurement. The internal faults mainly include the increase of dielectric loss and circuit fault caused by the insulation aging of the equipment, which is characterized by low heat exposure, concealment and difficulty in detection of the external surface. According to years of operation statistics and experience, external faults account for about 90% of the total faults and internal faults for about 10% of the total faults.

In order to ensure the safe and efficient operation of power production, higher requirements are put forward for the state overhaul of power equipment. Since the condition overhaul mainly depends on the condition detection and on-line monitoring of the equipment in operation, the operation condition detection and on-line monitoring of the power equipment always play an important role in the safety production of power. After years of application research and technology accumulation, we have introduced the power monitoring system based on infrared thermal camera to help power stations and power plants realize the automation and informatization of power operation and maintenance monitoring work. Infrared imaging technology, as a new technology, has incomparable superiority in power equipment operation state detection. Infrared imaging is based on the thermal state distribution of the equipment to diagnose the operating state of the equipment. It has the capability of imaging the thermal state of the equipment without stopping operation, without contact, far distance, fast and intuitively. Since the thermal image of the equipment is the real description of the thermal state and temperature distribution of the equipment under the operation state, and whether the thermal distribution of the power equipment under the operation state is normal or not is an important feature to judge whether the equipment is in good condition. Infrared imaging technology can be used to diagnose the equipment status and hidden defects by analyzing the thermal image of the equipment. By using infrared thermal camera and measuring surface temperature, external faults of distribution substation system can be easily found. Through tracking, analysis and comparison, internal faults of distribution substation system can also be found in time, which is very important to prevent accidents.

Through the application of thermal camera in plant distribution and motor maintenance, this paper shows that infrared thermal camera is indispensable for maintenance personnel, asset management, and even predictive maintenance in distribution equipment detection.

2. Application cases of infrared thermal camera in the maintenance of power distribution rooms and motors in factories

1) Project case and background

A large paint company, covering an area of more than 70,000 square meters, consists of several large workshops and two office and research and development buildings. The Infrastructure Section is responsible for the repair and maintenance of power distribution, power supply and hvAC facilities throughout the plant. The department carries out KPI assessment for unplanned equipment failure every year. Unexpected power failure/shutdown may affect product quality or interrupt production, causing significant economic loss. However, the staffing of the department is fixed. Therefore, it is necessary to find out the hidden danger through effective technical means and make reasonable maintenance plan.

2) Current solutions and their disadvantages

The current main solutions are:

As the main temperature measuring equipment, infrared point temperature gun is easy to use, but it has obvious disadvantages: single point temperature measuring; Due to the limited human resources, the infrared point temperature gun is only suitable for sample testing, not for the integrated management of equipment. Temperature data are generally not recorded (manual recording will consume human resources), so the working condition data of equipment cannot be collected and prospective preventive measures cannot be taken.

3) How to help customers solve the problems and advantages of using infrared thermal camera products

High operating efficiency: Infrared thermal camera adopts surface temperature measurement imaging technology, which can obtain the temperature distribution of the whole equipment. It has high operating efficiency and no detection blind spot.

Automatic monitoring: the system has a preset travel, the maximum use of computer system intelligent mode of operation, no need to watch and automatic monitoring.

Automatic warning: automatic alarm is given when abnormal temperature of the target equipment is found. Heat map of the working state of the equipment is stored, and information of the specific position of personnel is prompted, so as to troubleshoot immediately and provide work report. When the temperature of plant equipment exceeds the pre-set fault threshold, linkage alarm can be used to alarm, so as to timely and efficiently find out the problem and solve the problem, improve the detection and operation efficiency.

Remote control: realize remote temperature analysis and remote monitoring of power station equipment. The infrared on-line monitoring and control system at the station end has the hard contact of alarm to connect to the integrated automation system or remote operation equipment, providing the remote operation alarm information of fire fighting and early warning.

Software data analysis and summary: The software of Yoseen thermal camera can provide data analysis and management, and can store the data to the computer, which is convenient for data summary in the later period, improve the detection level, and facilitate the data summary of fault problems, so as to avoid the frequent occurrence of similar fault problems and improve the detection efficiency.

3. Which customers are needed to solve this problem?

Equipment maintenance departments of major manufacturers

Property management and logistics departments of government departments, universities, shopping malls, hotels, buildings, ports, power distribution rooms, data rooms, etc

Testing/inspection service companies and research institutes