A control system based on mppt technology

Abstract

The invention discloses an MPPT (maximum power point tracking)-technology-based control system, which comprises a power circuit module, a generatrix sampling circuit, a main generatrix error amplifier, a storage battery pack sampling circuit, a storage battery pack error amplifier, a charging and discharging control circuit and an MPPT control circuit, wherein the power circuit module comprises a solar panel array, a platform generatrix load and a storage battery pack; the input end of the generatrix sampling circuit is connected with the platform generatrix load; the input end of the main generatrix error amplifier is connected with the generatrix sampling circuit; the input end of the storage battery pack sampling circuit is connected with the storage battery pack; the input end of the storage battery pack error amplifier is connected with the storage battery pack sampling circuit; the input end of the charging and discharging control circuit is connected with the main generatrix error amplifier and the storage battery pack error amplifier, and the output end of the charging and discharging control circuit is connected with the power circuit module; the input end of the MPPT control circuit is connected with the main generatrix error amplifier, the output end of the MPPT control circuit is connected with the power circuit module, and the MPPT control circuit is used for switching in a non-MPPT working area or an MPPT charging working area or an MPPT discharging working area. Unified control over MPPT, storage battery pack charging and discharging and the fully modulated generatrix of an energy system can be realized, and meanwhile, high-reliability and stable running of a power system of a spacecraft can be ensured.

Description

technical field [0001] The invention relates to the control technology of the direct current conversion circuit of the energy system, in particular to a control system based on the MPPT technology. Background technique [0002] The direct energy transfer (DET) method (Direcet Energy Transfer) is adopted in domestic spacecraft power supply systems. The direct energy transfer method means that the output power of the solar cell array and battery pack is directly fed to the bus load of the platform through the bus bar. Due to the current shunt voltage limiting function of the shunt regulator, the operating point of the solar cell array is fixed at the bus voltage. The DET method adopts The power margin design is too large, and the general design exceeds the actual demand by about 20%, resulting in a great waste of energy. [0003] Different from the DET method, the MPPT method (Maximum Power Point Tracking) controls the output voltage of the solar cell array to make it work ne...

AI Technical Summary

Problems solved by technology

The direct energy transfer method means that the output power of the solar cell array and battery pack is directly fed to the platform bus load through the bus bar. Due to the shunt regulator's shunt voltage limiting function, the working point of the solar cell array is fixed at the bus voltage. The DET method adopts The power margin design is too large, and the general design exceeds about 20% of the actual demand, resulting in a great waste of energy

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