The importance of power system security

Lead: As China's economic development, power systems are moving in the direction of ultra-high voltage, large power grids, large capacity, and automation. The security issue is very important. Then, how to conduct on-line monitoring of the running electrical equipment, how to analyze the equipment quality, operating environment, equipment operation, and load through real-time data, which are urgent problems in the power system.

Electric facilities/equipment online temperature measurement necessity

1. Loosening of power connections: It is unavoidable that changes in the contact state are caused during the operation of conductive connections and plug connections of power equipment. It is also unavoidable that the temperature is too high. Only the on-line monitoring of temperature at this point can reflect its status. Therefore, it is necessary to promote the application of temperature online monitoring products.

Second, the power of high temperature exceeded: When the power equipment work, the normal heating of the components should not exceed its maximum allowable temperature in order to ensure safe operation. Temperature is one of the important parameters to measure the operating status of electrical equipment.

Third, the component loss heat: electrical equipment current carrying circuit contact (joint) and the connection due to electrical wear, mechanical operation, mechanical vibration caused by short-circuit power and thermal expansion and contraction at the junction caused by creep, oxidation, etc. Changing the contact state is inherently unavoidable.

Fourth, quality led to fever: installation is not in place, the quality of processing problems, material differences and design, construction, use and environmental factors, resulting in deterioration of its weak state.

Switchgear is the key to power system security

First, the switchgear is the key equipment of the power system. Because the contacts are in the contact box, the heat dissipation is poor, and the overtemperature causes the insulation of the contact box to deteriorate and cause short circuit accidents.

Second, the temperature monitoring of the switchgear has caused the attention of the power supply system. The "Guidance on the Application of Infrared Diagnostic Techniques for Live Equipment" has been widely used for temperature detection of high voltage power equipment. However, the infrared detection instrument can only detect the surface temperature of the device. If infrared radiation is blocked, the true temperature of the internal defect cannot be detected. And it is off-line monitoring, can not reflect the temperature change process and timely detection of equipment anomalies. Therefore, it is necessary to promote the application of online temperature monitoring of power equipment.

Third, the establishment of an on-line monitoring system for power equipment temperature, in addition to preventing electrical equipment from overheating accidents, improving the reliability of power supply, reducing the loss of power outages, and achieving state maintenance, can also reduce abnormal heat loss, and play an energy-saving effect. It also helps in the rational design and use of electrical equipment.

What are the advantages of power wireless temperature measurement?

I. Over the years, due to the limitation of the technical level, the level of the safe operation of the power system has been limited. Although we have used infrared thermometers and infrared imagers to solve the above problems, we have not been able to achieve the connection of circuit breakers and switches in switch cabinets. Point and contact temperature measurement, is completely helpless to fully enclosed metal armored cabinets.

Secondly, on-line temperature measurement has completely solved this incurable disease and realized real-time online detection of a running system of the power system. Through the analysis and prediction of the real-time data of the equipment, the occurrence of accidents is prevented and the problem is really prevented. . Secondly, it also plays a key role in achieving state maintenance in the future, improving maintenance efficiency, and greatly reducing maintenance costs and management costs.

Third, at present, the domestic power temperature measurement mainly uses infrared point measuring instruments and fiber-optic thermometers, while the online method can not solve the high-voltage insulation problems, so the high-voltage switch contacts and other space-limited electrical equipment are basically completely unmonitored. The state of operation, and high-grade substation there are two hidden dangers, one is the voltage level is high, one is a large area of ​​coverage, therefore, with the development of wireless temperature measurement technology, the power temperature measurement system has gradually been recognized In particular, wireless temperature measurement systems have been used by a number of power plants and power supply companies in recent years.

Fourth, the wireless temperature measurement and temperature measurement system developed by Zhengzhou Taien Technology Co., Ltd. not only maintains the advantages of the original wireless temperature measurement, but also greatly improves the temperature measurement and positioning and reduces the temperature measurement period. In addition, lessons learned from the low stability of the fiber-optic temperature measurement series system solve the problem of anti-contamination flashover. Due to the use of wireless signal transmission, there is no electromagnetic interference and regular maintenance issues. On demand.

Source: Zhengzhou Anding Technology Co., Ltd.