At present, the output voltage and current of domestic and foreign variable frequency power standard sources can only reach 1000V, 100A, and only a few countries such as the United States have this technical achievement. It is aimed at the technical problems in the key national motor energy-saving projects, frequency conversion power, frequency conversion energy measurement and other fields. The "variable frequency power standard source" developed by the above-mentioned cooperative unit has an output voltage and current of 10000V and 500A. In the case of low frequency and low speed of the motor, the output frequency can be expanded to 5Hz, which successfully solves the energy consumption of variable frequency motors. Measurement uniformity issues.
The expert appraisal committee led by Academician Zhang Zhonghua of the Chinese Academy of Engineering agreed that the frequency conversion power measurement technology studied by the project is a cutting-edge topic in the field of international metrology today, and the technology is difficult. The research team used digital synthesis, high-power amplification, intelligent measurement and control technology to successfully develop the variable-frequency high-power standard source for the first time, solving the variable-frequency power sensor, variable-frequency power analyzer, variable-frequency high-voltage, large-frequency Problems of traceability of the value of instruments, technical parameters such as current and efficiency of frequency conversion motors. It solves the bottleneck problem of frequency conversion power measurement technology in the field of energy saving and emission reduction in China. The developed high-voltage and high-current frequency conversion power standard source has filled the gaps at home and abroad, and the overall technology has reached the international advanced level. The indicator ranks in the international advanced level.
This achievement helps to improve the construction of basic measurement standards for the development of strategic emerging industries, improvement of people's livelihood, and other key areas; it can provide measurement guarantee for the efficiency test, motor test, and motor energy-saving transformation of the national "key energy-saving project of motor system" It is expected that during the "Twelfth Five-Year Plan" period, the operating efficiency of the motor system will be increased by 2% -3%, and the goal of annual power saving capacity of 80 billion kWh will be achieved.
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