Satellite digital power supply and distribution system

Abstract

A satellite digital power supply and distribution system is composed of a digital power supply control unit, a digital power distribution unit and a power supply and distribution health management unit. The digital power supply control unit and the digital power distribution unit are connected with the power supply and distribution health management unit through a bus and receive a control instruction of the power supply and distribution health management unit, and the power supply and distribution health management unit receives telemetry data returned by other units at the same time and uploads the telemetry data for subsequent satellite other subsystem analysis. Debugging points of electronic single machines of the power supply and distribution system can be greatly reduced, the design and development efficiency is improved, and control parameters of the power supply and distribution system are adjusted in real time and system operation is optimized through the power supply and distribution health management unit; and the fault detection and reconstruction capability of the power supply and distribution system is improved.

Description

Technical Field

[0001] The invention relates to a satellite digital power supply and distribution system, belonging to the technical field of power supply and distribution design of spacecraft. Background Art

[0002] The power supply and distribution system is the lifeline of the spacecraft. It plays a vital role in improving the satellite's carrying capacity and ensuring the safe and stable operation of the spacecraft. As the complexity of the power supply and distribution system of the entire satellite becomes higher and higher, higher requirements are placed on the design and development cycle, power supply configuration management, intelligent power distribution management, and complex system fault detection and optimized operation. Traditional spacecraft use analog control. On the one hand, the product itself occupies a large PCB area, the design and debugging cycle is long, and the design stage needs to cover the influence of temperature drift of analog devices; on the other hand, the perception and acquisition ability of the power supply and distribution system is limited, and the intelligent operation of the power supply and distribution system is difficult to achieve. Summary of the invention

[0003] The technical problem solved by the present invention is: in view of the problem that the intelligent operation of the power supply and distribution system is difficult to achieve in the current prior art, a satellite digital power supply and distribution system is proposed.

[0004] The present invention solves the above technical problems by the following technical solutions:

[0005] A satellite digital power supply and distribution system, comprising a digital power control unit, a digital power distribution unit and a power supply and distribution health management unit;

[0006] The digital power control unit is connected to the power supply and distribution health management unit through a bus, receives control instructions sent by the power supply and distribution health management unit, realizes power regulation of solar cells, charge and discharge control of batteries and safety fault monitoring, and transmits detection data back to the power supply and distribution health management unit in the form of telemetry data;

[0007] The digital power distribution unit is connected to the power supply and distribution health management unit through a bus, receives control instructions sent by the power supply and distribution health management unit, performs power supply and distribution control on the power distribution modules of each functional load device inside the digital power distribution unit, and collects output data of each functional load device and transmits it back to the power supply and distribution health management unit in the form of telemetry data;

[0008] The power supply and distribution health management unit sends corresponding control instructions to the digital power control unit and the digital distribution unit according to the satellite power distribution control requirements, and receives the detection data returned by the digital power control unit and the output data returned by the digital distribution unit to perform comprehensive evaluation and processing of the satellite power supply and distribution tasks.

[0009] The digital power control unit includes a digital control circuit, a solar cell regulation circuit and a battery charge and discharge regulation circuit;

[0010] The digital control circuit collects data from the solar cell regulation circuit and the battery charge and discharge regulation circuit. After calculation, it regulates the power or controls the charge and discharge of the solar cell and the battery respectively according to the satellite power supply control requirements. At the same time, it monitors the collected data for faults and sends the obtained monitoring data to the power supply and distribution health management unit.

[0011] Among them, the power supply control parameters and fault monitoring criteria can be adjusted by receiving control instructions sent by the power supply and distribution health management unit.

[0012] The number of the digital control circuits is determined according to the satellite power distribution control requirements and is arranged in parallel in the digital power control unit; the number of groups of solar cell regulation circuits and battery charge and discharge regulation circuits is the same as the number of digital control circuits, wherein the power of each group of solar cell regulation circuits and the power of the battery charge and discharge regulation circuits need to be designed to match; one digital control circuit controls two groups of solar cell regulation circuits and battery charge and discharge regulation circuits, and of two adjacent digital control circuits, any one digital control circuit is on duty and the other digital control circuit is used as a redundant backup, and when the digital control circuit on duty fails, it is switched to the redundant backup digital control circuit for power supply and distribution control.

[0013] The digital control circuit includes a digital bus error voltage amplifier, a digital battery charging current command controller, a digital solar cell power regulator, a digital battery charging current inner loop regulator, a digital battery discharging current inner loop regulator, a solar cell regulation circuit constant shunt fault detection and control module, a solar cell regulation circuit overcurrent protection detection and control module, a battery charge and discharge regulation circuit overcurrent protection detection and control module, and a key signal fault recording module;

[0014] A digital bus error voltage amplifier collects bus voltage parameters of the solar cell regulation circuit and the battery charge and discharge regulation circuit, calculates and obtains a main error voltage, and sends the main error voltage to a digital battery charge current command controller, a digital solar cell power regulator, a digital battery charge current inner loop regulator, and a digital battery discharge current inner loop regulator, respectively;

[0015] A digital battery charging current command controller sends a control command to a digital battery charging current inner loop regulator according to the calculation and voting results of the main error voltage and the power supply and distribution health management unit command;

[0016] A digital solar cell power regulator calculates a control pulse of a solar cell regulation circuit according to a main error voltage and sends a control instruction to the solar cell regulation circuit;

[0017] The digital battery charging current inner loop regulator calculates the control pulse of the battery charging regulation circuit according to the received main error voltage and control instructions to control the battery charging and regulate the charging current;

[0018] The digital battery discharge current inner loop regulator calculates the control pulse of the battery charging regulation circuit according to the received main error voltage and control instructions to control the battery discharge and regulate the discharge current;

[0019] The solar cell regulation circuit shunt fault detection and control module collects the power supply shunt status of each solar cell regulation circuit and determines whether it meets the sequential shunt requirements. If not, it will automatically reset the shunt switch status. If it still does not meet the sequential shunt requirements after three consecutive times, it will automatically disconnect the shunt switch and output the monitoring data to the power supply and distribution health management unit.

[0020] The solar cell regulation circuit overcurrent protection detection and control module collects the reverse current of each solar cell regulation circuit. If it exceeds the preset overcurrent protection threshold, it automatically disconnects the shunt switch and outputs the monitoring data to the power supply and distribution health management unit.

[0021] The overcurrent protection detection and control module of the battery charge and discharge regulation circuit collects the input and output current of each charge and discharge regulation circuit. If the overcurrent protection threshold is exceeded, the charge and discharge regulation circuit is automatically disconnected and the monitoring data is output to the power supply and distribution health management unit.

[0022] The key signal fault recording module selects the specified signal for fault recording according to the satellite power distribution control requirements, and outputs it to the power supply and distribution health management unit as required.

[0023] The digital bus error voltage amplifier, the digital battery charging current command controller, the digital solar cell power regulator, the digital battery charging current inner loop regulator, and the digital battery discharging current inner loop regulator receive the instructions obtained after the control instructions are decomposed, and adjust the loop parameters;

[0024] The solar cell regulation circuit constant shunt fault detection and control module, the solar cell regulation circuit overcurrent protection detection and control module, and the battery charge and discharge regulation circuit overcurrent protection detection and control module receive the instructions obtained after the control instructions are decomposed, and preset the fault threshold;

[0025] The key signal fault recording module receives the command obtained after decomposing the control command, selects the designated signal for parameter recording in the parameter list, and the designated signal is selected according to the satellite power distribution control requirements.

[0026] The digital bus error voltage amplifier and the digital battery charging current command controller both adopt a preset number of digital control circuits for hot backup voting to eliminate single point influences, and at the same time perform redundant hot backup voting with all digital control circuits on duty.

[0027] The solar cell power regulator, digital battery charging current inner loop regulator, digital battery discharging current inner loop regulator, solar cell regulation circuit short circuit fault detection and control module, solar cell regulation circuit constant shunt fault detection and control module, and battery charging and discharging regulation circuit overcurrent protection detection and control module all adopt dual redundant cold backup to eliminate single points.

[0028] In the digital power control unit, the control period of each digital control circuit is set to the millisecond level, the fault detection and action response time corresponding to the solar cell regulation circuit constant shunt fault detection and control module, the solar cell regulation circuit overcurrent protection detection and control module, and the battery charge and discharge regulation circuit overcurrent protection detection and control module is in the microsecond to sub-second level, and the parameter recording period of the key signal fault recording module is in the microsecond level.

[0029] The digital power distribution unit includes a load power distribution module, a heater power distribution module, a pyrotechnic power distribution module, and a secondary power distribution module. Each power distribution module realizes power supply and distribution control of the power distribution modules of each functional load device according to the control instructions sent by the power supply and distribution health management unit. Each power distribution module has an overcurrent protection function, which is realized through an overcurrent protection curve. The overcurrent protection curve is configured through the instructions of the power supply and distribution health management unit and is set to a curve change or a fixed threshold.

[0030] The power supply and distribution health management unit is integrated into the satellite service program to receive telemetry data from the digital power control unit and the digital power distribution unit for comprehensive evaluation and adjustment of subsequent satellite subsystems.

[0031] The advantages of the present invention compared with the prior art are:

[0032] A satellite digital power supply and distribution system provided by the present invention adopts a digital power control unit and a digital power distribution unit, which greatly reduces the debugging points of electronic stand-alone machines and improves the design and development efficiency. At the same time, the digital power control unit digitizes the control circuit, and can obtain telemetry information of a large number of loops without adding sensors, thereby improving the non-embedded perception capability. Through the digital power control unit and the digital power distribution unit, the system control parameters can be adjusted in real time through the power supply and distribution health management unit to optimize the system operation; and the fault detection and reconstruction capabilities of the power supply and distribution system are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the satellite digital power supply and distribution system architecture provided for the invention;

[0034] Figure 2 A schematic diagram of a typical architecture of a digital power control unit provided for the invention;

[0035] Figure 3 A functional schematic diagram of a digital control circuit of a digital power control unit provided for the invention; DETAILED DESCRIPTION

[0036] A satellite digital power supply and distribution system consists of a digital power control unit, a digital power distribution unit and a power supply and distribution health management unit; the digital power control unit and the digital power distribution unit are connected to the power supply and distribution health management unit through a bus, and receive control instructions from the power supply and distribution health management unit; the power supply and distribution health management unit simultaneously receives telemetry data returned by other units, and uploads the data for subsequent analysis of other satellite subsystems, which can greatly reduce the debugging points of electronic units in the power supply and distribution system and improve the efficiency of design and development; at the same time, the power supply and distribution health management unit can adjust the control parameters of the power supply and distribution system in real time to optimize the system operation; and improve the fault detection and reconstruction capabilities of the power supply and distribution system.

[0037] Satellite digital power supply and distribution system, the specific structural design includes:

[0038] It includes a digital power control unit, a digital power distribution unit and a power supply and distribution health management unit;

[0039] The digital power control unit is connected to the power supply and distribution health management unit through a bus, receives control instructions sent by the power supply and distribution health management unit, realizes power regulation of solar cells, charge and discharge control of storage batteries and safety fault monitoring, that is, safety fault monitoring of power regulation and charge and discharge control functions, but not solar cells and storage batteries themselves, and transmits the detection data back to the power supply and distribution health management unit in the form of telemetry data;

[0040] The digital power distribution unit is connected to the power supply and distribution health management unit through a bus, receives control instructions sent by the power supply and distribution health management unit, performs power supply and distribution control on the power distribution modules of each functional load device inside the digital power distribution unit, and collects output data of each functional load device and transmits it back to the power supply and distribution health management unit in the form of telemetry data;

[0041] The power supply and distribution health management unit sends corresponding control instructions to the digital power control unit and the digital distribution unit according to the satellite power distribution control requirements, and receives the detection data returned by the digital power control unit and the output data returned by the digital distribution unit to perform comprehensive evaluation and processing of the satellite power supply and distribution tasks.

[0042] The digital power control unit includes a digital control circuit, a solar cell regulation circuit and a battery charge and discharge regulation circuit;

[0043] The digital control circuit collects data from the solar cell regulation circuit and the battery charge and discharge regulation circuit. After calculation, it regulates the power or controls the charge and discharge of the solar cell and the battery according to the satellite power supply control requirements. At the same time, it monitors the collected data for faults and sends the obtained monitoring data to the power supply and distribution health management unit. The power supply control parameters and fault monitoring criteria can be adjusted by receiving the control instructions sent by the power supply and distribution health management unit.

[0044] Specifically, in a normal state, it can work by itself without the intervention of the power supply and distribution health management unit. If parameters and thresholds need to be adjusted, they can be adjusted through the power supply and distribution health management unit.

[0045] The number of digital control circuits is determined according to the satellite power distribution control requirements and is arranged in parallel in the digital power control unit; the number of groups of solar cell regulation circuits and battery charge and discharge regulation circuits is the same as the number of digital control circuits, wherein the power of each group of solar cell regulation circuits and the power of the battery charge and discharge regulation circuits need to be designed to match; one digital control circuit controls two groups of solar cell regulation circuits and battery charge and discharge regulation circuits, and of the two adjacent digital control circuits, one of the digital control circuits is on duty and the other is used as a redundant backup, and when the digital control circuit on duty fails, it is switched to the redundant backup digital control circuit for power supply and distribution control.

[0046] Further, other digital bus error voltage amplifiers and digital battery charging current command controllers are hot backup, and digital solar cell power regulators, digital battery charging current inner loop regulators, digital battery discharging current inner loop regulators, solar cell regulation circuit constant shunt fault detection and control modules, solar cell regulation circuit overcurrent protection detection and control modules, battery charge and discharge regulation circuit overcurrent protection detection and control modules, and key signal fault recording modules are cold backup;

[0047] The digital control circuit includes a digital bus error voltage amplifier, a digital battery charging current command controller, a digital solar cell power regulator, a digital battery charging current inner loop regulator, a digital battery discharging current inner loop regulator, a solar cell regulation circuit constant shunt fault detection and control module, a solar cell regulation circuit overcurrent protection detection and control module, a battery charge and discharge regulation circuit overcurrent protection detection and control module, and a key signal fault recording module;

[0048] The digital bus error voltage amplifier collects bus voltage parameters of the solar cell regulation circuit and the battery charge and discharge regulation circuit, obtains the main error voltage through calculation (generally digital PID), and sends the main error voltage to the digital battery charge current command controller, the digital solar cell power regulator, the digital battery charge current inner loop regulator, and the digital battery discharge current inner loop regulator respectively;

[0049] A digital battery charging current command controller sends a control command to a digital battery charging current inner loop regulator according to the calculation and voting results of the main error voltage and the power supply and distribution health management unit command;

[0050] A digital solar cell power regulator calculates a control pulse of a solar cell regulation circuit according to a main error voltage and sends a control instruction to the solar cell regulation circuit;

[0051] The digital battery charging current inner loop regulator calculates the control pulse of the battery charging regulation circuit according to the received main error voltage and control instructions to control the battery charging and regulate the charging current;

[0052] The digital battery discharge current inner loop regulator calculates the control pulse of the battery charging regulation circuit according to the received main error voltage and control instructions to control the battery discharge and regulate the discharge current;

[0053] The solar cell regulation circuit shunt fault detection and control module collects the power supply shunt status of each solar cell regulation circuit and determines whether it meets the sequential shunt requirements. If not, the shunt switch status will be reset autonomously. If it still does not meet the sequential shunt requirements after three consecutive times, the shunt switch will be disconnected autonomously. At the same time, the monitoring data will be output to the power supply and distribution health management unit;

[0054] The solar cell regulation circuit overcurrent protection detection and control module collects the reverse current of each solar cell regulation circuit. If it exceeds the preset overcurrent protection threshold, it automatically disconnects the shunt switch and outputs the collected monitoring data to the power supply and distribution health management unit.

[0055] The battery charge and discharge regulation circuit overcurrent protection detection and control module collects the input and output current of each charge and discharge regulation circuit. If the current exceeds the preset overcurrent protection threshold, the charge and discharge regulation circuit is automatically disconnected. At the same time, the monitoring data is output to the power supply and distribution health management unit.

[0056] The key signal fault recording module selects the specified signal for fault recording according to the satellite power distribution control requirements, and outputs it to the power supply and distribution health management unit as required.

[0057] The digital bus error voltage amplifier, the digital battery charging current command controller, the digital solar cell power regulator, the digital battery charging current inner loop regulator, and the digital battery discharging current inner loop regulator receive the instructions obtained after the control instructions are decomposed, and adjust the loop parameters;

[0058] The solar cell regulation circuit constant shunt fault detection and control module, the solar cell regulation circuit overcurrent protection detection and control module, and the battery charge and discharge regulation circuit overcurrent protection detection and control module receive the instructions obtained after the control instructions are decomposed, and preset the fault threshold;

[0059] The key signal fault recording module receives the command obtained after decomposing the control command, selects the designated signal for parameter recording in the parameter list, and the designated signal is selected according to the satellite power distribution control requirements.

[0060] The digital bus error voltage amplifier and the digital battery charging current command controller both use a preset number of digital control circuits for hot backup voting to eliminate single-point influences, while performing redundant hot backup voting with all digital control circuits on duty.

[0061] The solar cell power regulator, digital battery charging current inner loop regulator, digital battery discharging current inner loop regulator, solar cell regulation circuit short circuit fault detection and control module, solar cell regulation circuit constant shunt fault detection and control module, and battery charge and discharge regulation circuit overcurrent protection detection and control module all adopt dual redundant cold backup to eliminate single points.

[0062] In the digital power control unit, the control period of each digital control circuit is set to milliseconds. The fault detection and action response time corresponding to the solar cell regulation circuit constant shunt fault detection and control module, the solar cell regulation circuit overcurrent protection detection and control module, and the battery charge and discharge regulation circuit overcurrent protection detection and control module is in microseconds to sub-seconds. The parameter recording period of the key signal fault recording module is in microseconds.

[0063] The digital power distribution unit includes a load power distribution module, a heater power distribution module, a pyrotechnic power distribution module, and a secondary power distribution module. Each power distribution module implements power supply and distribution control for the power distribution modules of each functional load device according to the control instructions sent by the power supply and distribution health management unit. Each power distribution module has an overcurrent protection function, which is achieved through an overcurrent protection curve. The overcurrent protection curve is configured through the instructions of the power supply and distribution health management unit and is set to a curve change or a fixed threshold.

[0064] The power supply and distribution health management unit is integrated into the satellite service program to receive telemetry data from the digital power control unit and the digital distribution unit for comprehensive evaluation and adjustment of subsequent satellite subsystems.

[0065] The following is further described in conjunction with the accompanying drawings and preferred embodiments of the specification:

[0066] In the current embodiment, the satellite digital power supply and distribution system is composed of a digital power control unit, a digital power distribution unit and a power supply and distribution health management unit; the digital power control unit and the digital power distribution unit are connected to the power supply and distribution health management unit through a bus, receive instructions from the power supply and distribution health management unit, and upload telemetry, such as Figure 1 shown.

[0067] The digital power control unit includes several digital control circuits, solar cell regulation circuits and battery charge and discharge regulation circuits. Each digital control circuit can be used to complete the digital control function and circuit safety fault monitoring function of part or all of the solar cell regulation circuits and battery charge and discharge regulation circuits; at the same time, it can receive instructions from the power supply and distribution health management unit to complete the optimized operation of the digital power control unit.

[0068] Without loss of generality, Figure 2 As shown, the digital power control unit consists of 8 digital control circuits, 8 solar cell regulation circuits and 8 battery charge and discharge regulation circuits. Each digital control circuit controls 2 solar cell regulation circuits and 2 battery charge and discharge regulation circuits. Two adjacent digital power control circuits are cold backups for each other. If only one is on duty and a single digital control circuit fails, it can be switched to another one without affecting the function of the whole machine. If other numbers of module configurations are used, you can refer to this method for setting.

[0069] As Figure 3 As shown, each digital control circuit includes a digital bus error voltage amplifier, a digital battery charging current command controller, a digital solar cell power regulator, a digital battery charging current inner loop regulator, a digital battery discharging current inner loop regulator, solar cell regulation circuit constant shunt fault detection and control, solar cell regulation circuit overcurrent protection detection and control, battery charge and discharge regulation circuit overcurrent protection detection and control, and key signal fault recording.

[0070] Digital bus error voltage amplifier and digital battery charging current command controller can adopt N (N≥3) digital control circuit hot backup voting to eliminate single points. Digital solar cell power regulator, digital battery charging current inner loop regulator, digital battery discharge current inner loop regulator, solar cell regulation circuit short circuit fault detection and control, solar cell regulation circuit constant shunt fault detection and control, battery charge and discharge regulation circuit overcurrent protection detection and control can adopt dual redundant cold backup to eliminate single points.

[0071] Without loss of generality, Figure 2 In the digital power control unit shown, the digital bus error voltage amplifier and the digital battery charging current command controller are hot backup functions, and the four digital control circuits on duty perform four redundant hot backup votes to eliminate single points.

[0072] The digital solar cell power regulator, digital battery charging current inner loop regulator, digital battery discharging current inner loop regulator, solar cell regulation circuit short circuit fault detection and control, solar cell regulation circuit constant shunt fault detection and control, battery charge and discharge regulation circuit overcurrent protection detection and control are dual redundant cold backup functions, which are set on duty with the digital power control unit to eliminate single points.

[0073] At the same time, each digital control circuit can receive instructions from the power supply and distribution health management unit to adjust the loop parameters of the digital bus error voltage amplifier, the digital battery charging outer loop controller, the digital solar cell power regulator, the digital battery charging current inner loop regulator, and the digital battery discharging current inner loop regulator; adjust the fault thresholds of the solar cell regulation circuit short circuit fault detection and control, the solar cell regulation circuit constant shunt fault detection and control, and the battery charge and discharge regulation circuit overcurrent protection detection and control; select the signal for parameter recording in the parameter list, which generally includes bus voltage, bus current, battery voltage, battery charge and discharge current, solar cell current, solar cell voltage, etc.

[0074] The control cycle of a digital power control unit is generally in the millisecond range, the fault detection and action response time is in the microsecond to sub-second range, and the parameter recording cycle is in the microsecond range.

[0075] The digital power distribution unit includes several load power distribution modules, heater power distribution modules, pyrotechnic power distribution modules, and secondary power distribution modules. Each module has an overcurrent protection function. The overcurrent protection curve can be configured through the instructions of the power supply and distribution health management unit. 2 t curve, or a fixed threshold.

[0076] The power supply and distribution health management unit is generally integrated into the satellite service software. It can receive telemetry from the digital power control unit and the digital distribution unit, and conduct comprehensive evaluation with other subsystem telemetry to achieve the following functions:

[0077] Including but not limited to solar wing power prediction and attenuation assessment; battery charge state and health state prediction; time-frequency analysis and correlation analysis of high-frequency recording parameters; digital power control unit fault isolation and recovery; digital distribution unit fault isolation and recovery; digital power control unit optimization operation; comprehensive load power evaluation and protection curve optimization configuration; communication fault judgment.

[0078] The health assessment and fault diagnosis cycle of the power supply and distribution health management unit is generally above seconds.

[0079] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0080] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A satellite digital power supply and distribution system, characterized in that: It includes a digital power control unit, a digital power distribution unit and a power supply and distribution health management unit; The digital power control unit is connected to the power supply and distribution health management unit through a bus, receives control instructions sent by the power supply and distribution health management unit, realizes power regulation of solar cells, charge and discharge control of batteries and safety fault monitoring, and transmits detection data back to the power supply and distribution health management unit in the form of telemetry data; The digital power distribution unit is connected to the power supply and distribution health management unit through a bus, receives control instructions sent by the power supply and distribution health management unit, performs power supply and distribution control on the power distribution modules of each functional load device inside the digital power distribution unit, and collects output data of each functional load device and transmits it back to the power supply and distribution health management unit in the form of telemetry data; The power supply and distribution health management unit sends corresponding control instructions to the digital power control unit and the digital distribution unit according to the satellite power distribution control requirements, and receives the detection data returned by the digital power control unit and the output data returned by the digital distribution unit to perform comprehensive evaluation and processing of the satellite power supply and distribution tasks.

2. A satellite digital power supply and distribution system according to claim 1, characterized in that: The digital power control unit includes a digital control circuit, a solar cell regulation circuit and a battery charge and discharge regulation circuit; The digital control circuit collects data from the solar cell regulation circuit and the battery charge and discharge regulation circuit. After calculation, it regulates the power or controls the charge and discharge of the solar cell and the battery respectively according to the satellite power supply control requirements. At the same time, it monitors the collected data for faults and sends the obtained monitoring data to the power supply and distribution health management unit. Among them, the power supply control parameters and fault monitoring criteria can be adjusted by receiving control instructions sent by the power supply and distribution health management unit.

3. A satellite digital power supply and distribution system according to claim 2, characterized in that: The number of the digital control circuits is determined according to the satellite power distribution control requirements and is arranged in parallel in the digital power control unit; the number of groups of solar cell regulation circuits and battery charge and discharge regulation circuits is the same as the number of digital control circuits, wherein the power of each group of solar cell regulation circuits and the power of the battery charge and discharge regulation circuits need to be designed to match; one digital control circuit controls two groups of solar cell regulation circuits and battery charge and discharge regulation circuits, and of two adjacent digital control circuits, any one digital control circuit is on duty and the other digital control circuit is used as a redundant backup, and when the digital control circuit on duty fails, it is switched to the redundant backup digital control circuit for power supply and distribution control.

4. A satellite digital power supply and distribution system according to claim 2, characterized in that: The digital control circuit includes a digital bus error voltage amplifier, a digital battery charging current command controller, a digital solar cell power regulator, a digital battery charging current inner loop regulator, a digital battery discharging current inner loop regulator, a solar cell regulation circuit constant shunt fault detection and control module, a solar cell regulation circuit overcurrent protection detection and control module, a battery charge and discharge regulation circuit overcurrent protection detection and control module, and a key signal fault recording module; A digital bus error voltage amplifier collects bus voltage parameters of the solar cell regulation circuit and the battery charge and discharge regulation circuit, calculates and obtains a main error voltage, and sends the main error voltage to a digital battery charge current command controller, a digital solar cell power regulator, a digital battery charge current inner loop regulator, and a digital battery discharge current inner loop regulator, respectively; A digital battery charging current command controller sends a control command to a digital battery charging current inner loop regulator according to the calculation and voting results of the main error voltage and the power supply and distribution health management unit command; A digital solar cell power regulator calculates a control pulse of a solar cell regulation circuit according to a main error voltage and sends a control instruction to the solar cell regulation circuit; The digital battery charging current inner loop regulator calculates the control pulse of the battery charging regulation circuit according to the received main error voltage and control instructions to control the battery charging and regulate the charging current; The digital battery discharge current inner loop regulator calculates the control pulse of the battery charging regulation circuit according to the received main error voltage and control instructions to control the battery discharge and regulate the discharge current; The solar cell regulation circuit shunt fault detection and control module collects the power supply shunt status of each solar cell regulation circuit and determines whether it meets the sequential shunt requirements. If not, it will automatically reset the shunt switch status. If it still does not meet the sequential shunt requirements after three consecutive times, it will automatically disconnect the shunt switch and output the monitoring data to the power supply and distribution health management unit. The solar cell regulation circuit overcurrent protection detection and control module collects the reverse current of each solar cell regulation circuit. If it exceeds the preset overcurrent protection threshold, it automatically disconnects the shunt switch and outputs the monitoring data to the power supply and distribution health management unit. The overcurrent protection detection and control module of the battery charge and discharge regulation circuit collects the input and output current of each charge and discharge regulation circuit. If the overcurrent protection threshold is exceeded, the charge and discharge regulation circuit is automatically disconnected and the monitoring data is output to the power supply and distribution health management unit. The key signal fault recording module selects the specified signal for fault recording according to the satellite power distribution control requirements, and outputs it to the power supply and distribution health management unit as required.

5. A satellite digital power supply and distribution system according to claim 4, characterized in that: The digital bus error voltage amplifier, the digital battery charging current command controller, the digital solar cell power regulator, the digital battery charging current inner loop regulator, and the digital battery discharging current inner loop regulator receive the instructions obtained after the control instructions are decomposed, and adjust the loop parameters; The solar cell regulation circuit constant shunt fault detection and control module, the solar cell regulation circuit overcurrent protection detection and control module, and the battery charge and discharge regulation circuit overcurrent protection detection and control module receive the instructions obtained after the control instructions are decomposed, and preset the fault threshold; The key signal fault recording module receives the command obtained after decomposing the control command, selects the designated signal for parameter recording in the parameter list, and the designated signal is selected according to the satellite power distribution control requirements.

6. A satellite digital power supply and distribution system according to claim 4, characterized in that: The digital bus error voltage amplifier and the digital battery charging current command controller both adopt a preset number of digital control circuits for hot backup voting to eliminate single point influences, and at the same time perform redundant hot backup voting with all digital control circuits on duty.

7. A satellite digital power supply and distribution system according to claim 4, characterized in that: The solar cell power regulator, digital battery charging current inner loop regulator, digital battery discharging current inner loop regulator, solar cell regulation circuit short circuit fault detection and control module, solar cell regulation circuit constant shunt fault detection and control module, and battery charging and discharging regulation circuit overcurrent protection detection and control module all adopt dual redundant cold backup to eliminate single points.

8. A satellite digital power supply and distribution system according to claim 4, characterized in that: In the digital power control unit, the control period of each digital control circuit is set to the millisecond level, the fault detection and action response time corresponding to the solar cell regulation circuit constant shunt fault detection and control module, the solar cell regulation circuit overcurrent protection detection and control module, and the battery charge and discharge regulation circuit overcurrent protection detection and control module is in the microsecond to sub-second level, and the parameter recording period of the key signal fault recording module is in the microsecond level.

9. A satellite digital power supply and distribution system according to claim 4, characterized in that: The digital power distribution unit includes a load power distribution module, a heater power distribution module, a pyrotechnic power distribution module, and a secondary power distribution module. Each power distribution module realizes power supply and distribution control of the power distribution modules of each functional load device according to the control instructions sent by the power supply and distribution health management unit. Each power distribution module has an overcurrent protection function, which is realized through an overcurrent protection curve. The overcurrent protection curve is configured through the instructions of the power supply and distribution health management unit and is set to a curve change or a fixed threshold.

10. A satellite digital power supply and distribution system according to claim 1, characterized in that: The power supply and distribution health management unit is integrated into the satellite service program to receive telemetry data from the digital power control unit and the digital power distribution unit for comprehensive evaluation and adjustment of subsequent satellite subsystems.

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