Power supply controller and direct grid-connected control method

Abstract

The invention provides a power supply controller and a direct grid-connected control method, the power supply controller comprises an S3R, a BCDR and a bus error amplifier, the S3R is connected with a first bus error amplifier, and the BCDR is connected with a second bus error amplifier. The method has the advantages that the BCDR and the S3R are provided with the independent bus error amplifiers, loop design decoupling of the BCDR and the S3R is achieved, the design is more flexible, the dynamic characteristic and stability of the bus are improved, and the power expansion capacity is enhanced; through the direct grid-connected control method of the dual power supply controllers, the power expansion capability of the power supply controllers is further improved, the grid-connected method does not need to add an independent grid-connected controller single machine, so that power expansion can be performed under the condition of not additionally increasing the weight of the whole satellite, and the method can be expanded and applied to grid-connected control of multiple power supply controllers.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a power controller and a direct grid-connected control method. Background technique [0002] The power controller PCU is the only source of satellite power supply. No matter whether the satellite is in the light area or the shadow area, the power regulation system keeps the bus voltage at a constant value. figure 1 It is a functional block diagram of the PCU, and the power supply is managed uniformly by the bus error amplifier M. S3R is a shunt regulator, and the charging and discharging regulating unit BCDR is a bidirectional power converter. When the output power of the solar cell array SA cannot meet the load requirements, the bus voltage is regulated by the charging and discharging regulating unit BCDR through the discharge current to provide power to the output bus. ; When the output power of the solar cell array is greater than the load requirement but cannot meet the p...

AI Technical Summary

Problems solved by technology

[0014] (1) It is more difficult for BCDR to meet the full range of loop stability with the number of module configurations;

[0015] (2) The design of the S3R hysteresis control interval is limited, and the phenomenon of double-stage and multi-stage regulation is intensified, resulting in a decrease in dynamic performance and an increase in heat consumption

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