Power control unit (PCU) control system based on bidirectional multi-port converter with wide voltage range

Abstract

The invention provides a spacecraft power controller control system based on a bidirectional multi-port converter with a wide voltage range. The spacecraft power controller control system comprises a main power part, a field programmable gate array (FPGA) part, a digital-to-analog conversion part, a voting circuit and a controlled volume sampling circuit, wherein the main power part is composed of N main power conversion modules, each main power module adopts a bidirectional three-port converter to achieve adjustment and scheduling of energy among a solar array SA, a bus BUS and a battery BAT, and the N main power modules are connected in parallel to achieve power expansion; the FPGA part comprises N FPGA modules corresponding to the N main power modules; the controlled volume sampling circuit is used for sampling the controlled volume of the power part and providing the controlled volume to the FPGA part through the A / D conversion part; driving signals given out by the FPGA are used for respectively controlling the N main power modules through the D / A conversion circuit; and the FPGA part serves as a control core of the system, and the control function of a PCU is achieved by the converters of the main power modules through a control algorithm and a control logic.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a control system of a spacecraft power controller. Background technique [0002] Multi-port converters, especially three-port converters, have important applications in aerospace, automotive electronics, photovoltaic systems and many other fields. Usually, multiple ports can only transmit power to one of the ports in one direction, while other ports other than this port cannot transfer energy. [0003] Patent Document 1 (Chinese Patent Publication No.: CN104868551A) proposes an FPGA-based small satellite MPPT control system, the switching power supply circuit is connected to the solar cell array to charge the lithium battery; the current sampling circuit and the voltage sampling circuit respectively collect the solar cell array The output current and voltage signals of the output current and voltage are conditioned and filtered, and then converted through the A / D sampl...

AI Technical Summary

Problems solved by technology

However, this scheme is applied to solar array input and battery output, is a two-port converter, and is only suitable for small power (small satellites)

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