METHOD TO CONTROL AUTONOMOUS POWER SUPPLY SYSTEM OF SPACECRAFT Russian patent published in 2012 - IPC H02J7/34 

FIELD: electricity.

SUBSTANCE: method to control an autonomous power supply system of a spacecraft relates to electrical engineering, namely, to autonomous power supply systems (PSS) of spacecrafts (SC), using photoelectric batteries (PB) as primary sources of energy, and accumulator batteries (AB) - as energy accumulators. The method to control an autonomous power supply system, comprising a solar battery and n accumulator batteries, a voltage stabiliser, connected between the solar battery and the load, and n charging-discharging devices, consists in control of the voltage stabiliser, charging and discharging devices depending on input and output voltage of the system; monitoring of the extent of charge of accumulator batteries; prohibition for operation of an appropriate charging device, when the maximum level of this accumulator battery charge is achieved, and this prohibition is removed as the charge level is reduced; prohibition for operation of an appropriate charging device as it achieves the specified minimum level of charge of this accumulator battery and removal of this prohibition as the charge level of this accumulator battery increases; prohibition of operation of all charging devices and termination of control with discharge devices in case of emergency discharge of accumulator batteries in case PB orientation to the Sun is lost; removal of prohibition for operation of all discharging devices and resumption of discharging devices control by signals on the charge level. When accumulator batteries are charged to a certain capacitance value, output voltage of the system is monitored with the help of a threshold sensor; under emergency discharge of several m(m≤n) accumulator batteries to the minimum level of charge, a control signal is generated into a board complex of spacecraft control for disconnection of a part of board equipment and memorised; in case of emergency discharge of all n operating accumulator batteries to the minimum charge level, a prohibition is removed for operation of all discharge devices; in case if after memorisation of a control signal the output voltage of the power supply system reduces to the specified threshold value, operation of all discharge devices is prohibited, and control of discharge devices is stopped by signals of the charge level; after resumption of photoelectric battery orientation to the Sum, supply of the remaining connected part of board equipment is sent from the photoelectric battery via the voltage stabiliser; reset of control signal stabilisation is done in accordance with an external one-time command (OTC).

EFFECT: higher durability of a SC under emergency modes of its operation, maximum use of stored capacitance of AB and provision of supply to a board control complex to terminate or retain a process of emergency situation development, and also avoidance of irreversible discharge of AB, in case a power balance is violated.

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