Method for calculating energy storage capacitance of high-voltage direct-current power supply architecture

Abstract

The invention relates to a high-voltage direct-current power supply architecture energy storage capacitance calculation method which is based on a high-voltage direct-current bus power supply system architecture, the system comprises a platform direct-current device, a power distribution device, a primary power supply, an energy storage capacitor, an array surface DC / DC power supply and a pulse load, and the primary power supply can restrain power fluctuation; the primary power supply boosts high-voltage direct current provided by the power supply platform to direct current, the transmission cable transmits the direct current to the array surface, and the array surface DC / DC power supply converts the direct current into low-voltage direct current to supply power to the array surface pulse load; the calculation method of the energy storage capacitor comprises the steps of determining basic parameters of a power supply system, and calculating the capacity of the energy storage capacitor according to voltage variation of a high-voltage direct-current bus; calculating the capacity of an energy storage capacitor according to the power fluctuation index requirement; calculating the capacity of an energy storage capacitor by considering the dynamic characteristics of a primary power supply; and taking the maximum value of the three as the final result of the energy storage capacitor. According to the invention, the power supply system has good dynamic performance, and the power change is more stable.

Description

technical field [0001] The invention relates to the field of electrical engineering, in particular to a method for calculating an energy storage capacitor of a high-voltage direct current power supply structure. Background technique [0002] The functions of modern phased array radars are gradually diversified, which can simultaneously realize detection, reconnaissance, jamming, communication, tracking and other functions in one radar, which leads to the gradual increase of the system radiation power and the working pulse width. For example, the peak power of the system power supply reaches the megawatt level, and the average power also reaches the megawatt level. The power supply capacity of some platforms is equivalent to the power supply demand capacity of the radar system. The characteristic of the phased array radar is that the front face works in the pulse mode, and the radar pulse load transfers the pulse power to the power supply side through the power supply system,...

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Problems solved by technology

Literature [1] discloses a bidirectional converter to compensate the problem of excessive bus current fluctuation caused by pulse load characteristics, which solves the problem of adaptability between pulse load and power supply, but there are local peaks in the input current waveform, which is also The limitations of the parallel scheme, and the power of the bidirectional converter that needs to be configured in the parallel scheme is more than twice the average power of the power supply system. Considering the cost and volume, the parallel scheme is difficult to apply in actual engineering, especially for megawatt-level power supply system; in addition, only the test and simulation results are given in the literature, and the theoretical calculation method of the energy storage capacitor is not given

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