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Application of Passive Wireless Temperature Measuring Device in Transformer
Temperature is one of the key parameters of transformer operation, real-time monitoring of transformer temperature can effectively prevent accidents and ensure the safe and stable operation of transformer equipment. Researchers Zhu Jianhua, Liang Dong, Li Fang, Zhai Haiwen and Feng Linna, from Xi'an West Variable Components Co., Ltd., wrote an article in the first issue of Electrical Technology magazine in 2020, proposing a passive wireless temperature measurement device.
Long-term Qualitative Analysis of Regional Distribution of Electricity Increment in China
When making investment decisions on power supply projects such as coal power, gas power and nuclear power, the balance of commonly used electricity power is used to measure the power surplus and power equipment utilization hours in the next few years, and to measure the economy of power supply projects in combination with parameters such as electricity price, fuel price and unit cost. Electricity balance is a short-term quantitative prediction tool, the prediction accuracy is high in 2 to 3 years, the prediction accuracy of 3 to 5 years decreases, it is difficult to predict the power supply and demand and utilization hours after 5 years. The construction period of coal power and gas power is 18-24 months, and the construction period of nuclear power is 5 years. The predicted power surplus and utilization hours at the time of investment decision-making will decrease or even fail when the project is completed.
Insulation coordination of low-voltage switchgear assembly
In 1987, the 17D sub-technical committee of the International Electrotechnical Commission (IEC) drafted a technical document entitled "Supplement 1 to IEC439 on Insulation Coordination Requirements", which formally introduced the insulation coordination problem into low-voltage switchgear and control equipment. As far as the actual situation of our country is concerned, in the high and low voltage electrical products, the insulation coordination of the equipment is still a big problem, and because the concept of insulation coordination is formally quoted in the low voltage switchgear and control equipment, it is only in the past two years. Therefore, it is an important problem to correctly handle and solve the problem of insulation coordination in products.
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