科研之友
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摘要
The development of new-type power system with renewable energy as the main body puts forward new requirements for metering devices and power conversion equipment. Innovative power theory is required to devise and control the devices to adapt to various electrical system structures. The similarities and discrepancies of conservative power theory（CPT） and instantaneous reactive power theory（IRPT） in current decomposition for different scenarios are discussed by establishing multiple three-phase electrical power system scenarios consisting of different sources and loads. The results show that IRPT can obtain satisfying outcomes only in sinusoidal voltage cases. Based on CPT current decomposition，it can better explain the power transmission phenomenon and analyze the load characteristics under various voltage and load conditions. As a result，the CPT shows a promising potential in load characteristic identification，electricity metering，filtering and compensation，power converter control and so on. ? 2023 Electric Power Automation Equipment Press.
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