CN112242698A - Hundred kilowatt-level spacecraft full-regulation power supply system - Google Patents
Hundred kilowatt-level spacecraft full-regulation power supply system Download PDFInfo
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- CN112242698A CN112242698A CN202011022792.4A CN202011022792A CN112242698A CN 112242698 A CN112242698 A CN 112242698A CN 202011022792 A CN202011022792 A CN 202011022792A CN 112242698 A CN112242698 A CN 112242698A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/12—Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/08—Three-wire systems; Systems having more than three wires
- H02J1/084—Three-wire systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J1/086—Three-wire systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load or loads and source or sources when the main path fails
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a hundred-kilowatt spacecraft full-regulation power supply system which can solve the problems of heavy cable transmission weight, low efficiency and the like and realize efficient boosting conversion from a 100V solar cell array to a 400V bus. The technical scheme of the invention comprises the following steps: more than one photovoltaic module connected in parallel is connected into a 400V full-regulation bus; the storage battery in more than one energy storage module connected in parallel is connected into a 400V full-regulation bus after being charged and discharged, and the storage battery is directly connected into a 300V non-regulation pulse power bus; more than one parallel grid-connected module is connected with a 400V full-regulation bus and a 300V unregulated pulse power bus, so that bidirectional conversion between the two buses is realized; and the comprehensive scheduling management module calls the photovoltaic module, the energy storage module and the grid-connected module in a grading and layering manner according to the power generation capacity and the load demand.
Description
Technical Field
The invention relates to the technical field of spacecraft power supplies, in particular to a hundred-kilowatt-level spacecraft power supply full-regulation system.
Background
The spacecraft power supply system is called as the heart of the spacecraft, provides energy required by the work of various load devices of the spacecraft, and is the key point of stable operation of the spacecraft. In a spacecraft power supply system, a solar cell array is generally used for generating electricity through a photoelectric effect, providing energy for a spacecraft in an illumination period and charging a storage battery; the storage battery pack provides energy for the spacecraft in a non-illumination period; when the short-term power demand of the spacecraft is larger than the power generated by the solar battery array, the storage battery pack can also be used as a backup power source to participate in combined power supply.
In the past, the bus voltage of the spacecraft is generally three grades of 28V, 42V and 100V, the maximum power grade is a space station, and the power requirement is 27 kW. The spacecraft power supply system is generally configured as a solar cell array, a storage battery pack and a power supply controller, wherein the solar cell array adopts silicon cells and single-junction or multi-junction gallium arsenide cells, and the output voltage of the solar cell array is not higher than 100V; the storage battery pack adopts a cadmium-nickel storage battery, a hydrogen-nickel storage battery or a lithium ion storage battery, adopts a series-parallel connection mode, and has output voltage not higher than 100V; according to the load, the power supply controller charges, supplies or shunts the redundant electric energy of the solar cell array in the illumination period, controls the discharge of the storage battery pack in the shadow period, and forms an unregulated, semi-regulated or fully regulated bus according to different regulation modes. When the power grade and the bus voltage are low, the method is simple and widely applied.
With the increasing power demand of spacecrafts, the demand of high-power spacecrafts such as high-power communication satellites, civil high-resolution SAR satellites, space solar power stations, space nuclear power spacecrafts, large in-orbit service stations and the like on ultra-high-power energy systems is continuously enhanced, and 50kW-100kW ultra-high-power supply systems become the development trend of future high-power spacecraft energy systems.
However, the maximum voltage of the existing bus is 100V, the transmission current is increased to 1000A, the weight of the cable reaches over 300kg, the power line has 10kW, the loss is up to 10%, and the task requirement cannot be met; meanwhile, the scale of the solar cell array and the storage battery pack is continuously enlarged, the traditional solar cell array is uniformly arranged, the uniform MEA mode is limited, and the high-power multi-load flexible and efficient power supply requirement cannot be met.
Therefore, the solar cell array and the storage battery pack are divided in scale by adopting a higher bus voltage and a higher-efficiency power conversion technology, a plurality of independent energy modules are configured, and intelligent management is performed through energy comprehensive scheduling, so that the power supply system is a necessary choice for designing a 100kW spacecraft power supply system.
Disclosure of Invention
In view of this, the invention provides a hundred-kilowatt-level spacecraft full-regulation power supply system, which can solve the problems of heavy cable transmission weight, low efficiency and the like, and realize efficient boost conversion from a 100V solar cell array to a 400V bus.
In order to achieve the purpose, the technical scheme of the invention is as follows: a hundred kilowatt-class spacecraft fully regulated power supply system, comprising: more than one photovoltaic module connected in parallel is connected into a 400V full-regulation bus; the storage battery in more than one energy storage module connected in parallel is connected into a 400V full-regulation bus after being charged and discharged, and the storage battery is directly connected into a 300V non-regulation pulse power bus; more than one parallel grid-connected module is connected with a 400V full-regulation bus and a 300V unregulated pulse power bus, so that bidirectional conversion between the two buses is realized; and the comprehensive scheduling management module calls the photovoltaic module, the energy storage module and the grid-connected module in a grading and layering manner according to the power generation capacity and the load demand.
Furthermore, the photovoltaic module is composed of a solar cell array and a power regulator, the power regulator carries out power regulation and voltage conversion on the output power of the solar cell array, a 400V full-regulation bus is output, and a single photovoltaic module outputs fixed power.
Furthermore, the energy storage module is composed of a storage battery, a storage battery management system and a charging and discharging unit; the voltage of the storage battery pack is set to 300V, and the capacity is configured according to the requirement; the storage battery management system is responsible for monitoring and maintaining the health state of the storage battery, and performing temperature control management, balance management and fault reconstruction management on the storage battery; the charging and discharging unit is responsible for voltage conversion and power regulation of input and output power of the storage battery, and charging and discharging management of the storage battery is achieved.
After the regulation of the charging and discharging unit, the energy storage module is connected with a 400V full-regulation bus, and the storage battery is directly connected with a 300V unregulated pulse power bus without regulation of the charging and discharging unit.
A single energy storage module outputs fixed power, more than one energy storage modules are connected in parallel and respectively output to a 400V full-regulation bus and a 300V non-regulation pulse power bus.
Further, the grid-connected module is simultaneously connected with the 400V full-adjustment bus and the 300V unregulated pulse power bus, so that grid-connected reconstruction between the 400V full-adjustment bus and the 300V unregulated pulse power bus or grid-connected reconstruction between two hundred-kilowatt spacecraft full-adjustment power supply systems is realized.
Further, the comprehensive scheduling management module calls the photovoltaic module, the energy storage module and the grid-connected module in a grading and layering mode according to the power generation capacity and the load demand, and the comprehensive scheduling management module specifically comprises the following steps: when the power supply system runs, firstly, the photovoltaic modules are called to supply power, and the number of the photovoltaic modules participating in power supply is increased along with the increase of the load; when the photovoltaic modules are all called and the load requirements cannot be met, the energy storage modules are started to be called, and the number of the energy storage modules participating in power supply is increased along with the increase of the load; when the photovoltaic modules and the energy storage modules are all called and the load requirements still cannot be met, calling the grid-connected modules is started, and the number of the grid-connected modules participating in power supply is gradually increased along with the increase of the load until all the grid-connected modules are called.
Has the advantages that:
the invention provides a hundred-kilowatt-level spacecraft full-regulation power supply system which adopts a 400V bus voltage and distributed energy local area network architecture, and forms an extensible 100kW spacecraft power supply system through parallel connection of a plurality of photovoltaic modules, a 300V storage battery energy storage module and a grid-connected module and through energy classification dispatching management. Compared with the prior art, the invention has the advantages that: the 100 kW-level spacecraft power supply system is flexibly and reliably realized through hierarchical layered energy scheduling based on the distributed parallel connection of three different energy modules, namely a photovoltaic module, an energy storage module, a grid-connected module and the like, by adopting the 400V bus voltage. The invention solves the problems of overhigh transmission current, overlarge weight of a transmission cable, large loss of a transmission path, lower energy distribution and calling efficiency and the like in the conventional bus voltage system.
Drawings
FIG. 1 is an energy architecture diagram of a power system of a 100kW spacecraft.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention provides a hundred kilowatt-level spacecraft full-regulation power supply system, the topological structure of which is shown in figure 1, and the 100kW spacecraft power supply system scheme provided by the embodiment comprises the following steps: a plurality of photovoltaic modules connected in parallel are connected into a 400V full-regulating bus; the storage batteries in the energy storage modules connected in parallel are connected into a 400V full-regulation bus after being charged and discharged, and the storage batteries are directly connected into a 300V non-regulation pulse power bus; the parallel grid-connected modules are connected with a 400V full-regulation bus and a 300V unregulated pulse power bus, so that bidirectional conversion between the two buses is realized; the comprehensive scheduling management module calls the photovoltaic module, the energy storage module and the grid-connected module in a grading and layering mode according to the power generation capacity and the load demand.
The full-regulation power supply system comprises a 400V full-regulation bus and a 300V non-regulation pulse bus, wherein the 400V full-regulation bus is responsible for supplying power energy to a 400V load, and the 300V non-regulation bus is responsible for supplying power to non-regulation loads such as a high-power SAR load and high-power electric propulsion;
100kW electrical power generating system is formed by a plurality of photovoltaic module parallelly connected, and single photovoltaic module adopts the full regulation MPPT control mode of tandem type, and input voltage 100V, output voltage 400V, system power can be expanded by the increase of photovoltaic module quantity: as shown in fig. 1, a 5kW photovoltaic module is composed of a solar cell array and a power conditioner. The power regulator is used for carrying out power regulation and voltage conversion on the output power of the solar cell array and outputting a 400V full-regulation bus. A single photovoltaic module outputs fixed power, 20 photovoltaic modules of 5kW are connected in parallel, and the total power of the output 400V full-regulation bus can reach 100 kW.
The 300V energy storage module can receive 400V charging electric energy from the photovoltaic module and can output power to a 400V full-regulation bus after discharge regulation; the 300V energy storage module is directly output to a 300V unregulated bus without regulation; the bus output capacity is not adjusted, and the expansion is carried out by adding a 300V energy storage module; as shown in fig. 1, the energy storage module is composed of a storage battery, a storage battery management system, and a charging/discharging unit. The voltage of the storage battery pack is set to 300V, and the capacity can be configured according to the requirement; the storage battery management system is responsible for monitoring and maintaining the health state of the storage battery, and performing temperature control management, balance management and fault reconstruction management on the storage battery; the charging and discharging unit is responsible for voltage conversion and power regulation of input and output power of the storage battery, and charging and discharging management of the storage battery is achieved. After the regulation of the charging and discharging unit, the energy storage module is connected with a 400V full-regulation bus, and the storage battery is directly connected with a 300V unregulated pulse power bus without regulation of the charging and discharging unit. A single energy storage module outputs fixed power, and a plurality of energy storage modules are connected in parallel and respectively output to a 400V full-regulation bus and a 300V non-regulation pulse power bus.
The grid-connected module can realize grid-connected reconstruction between a 400V bus and a 300V unregulated bus and also can realize grid-connected reconstruction between one 100kW power system and another 100kW power system; by increasing the number of grid-connected modules, the grid-connected power capability can be expanded. As shown in fig. 1, the 5kW grid-connected module is simultaneously connected with a 400V full-regulation bus and a 300V unregulated pulse power bus, so that grid-connected reconfiguration between two buses of a 100kW power system or grid-connected reconfiguration between two 100kW power systems is realized, and power is shared by 5 kW.
And (3) comprehensive management scheduling strategy: when the power supply system operates, firstly, the photovoltaic modules are called to supply power, and the number of the photovoltaic modules participating in power supply is gradually increased along with the increase of the load; when the photovoltaic modules are all called and the load requirements can not be met, the energy storage modules are started to be called, and the number of the energy storage modules participating in power supply is gradually increased along with the increase of the load; when the photovoltaic modules and the energy storage modules are all called and the load requirements still cannot be met, calling the grid-connected modules is started, and the number of the grid-connected modules participating in power supply is gradually increased along with the increase of the load until all the grid-connected modules are called.
According to the distributed reconfigurable architecture of the 100kW power system, three energy modules, namely a 5kW photovoltaic module, a 300V energy storage module and a 5kW grid-connected module, are adopted to jointly participate in power supply of a 100 kW-level spacecraft in a parallel connection mode, the distributed placement mode is adopted, and expansion of the power level of the system and reconfiguration of power supply topology are realized through increase of the number of the modules, so that the distributed reconfigurable architecture is an important basis of the distributed reconfigurable architecture of the invention.
The invention designs a 400V full-regulation bus and a 300V non-regulation pulse bus, wherein the 400V full-regulation bus outputs 100kW of constant power, and the 300V non-regulation pulse bus outputs 100kW of peak power, which is an important basis of the invention.
The photovoltaic module with 5kW output power of the photovoltaic module with 5kW adopts a modular design, 6 power modules with 1kW output power are connected in parallel for output, the power modules adopt a series MPPT full regulation control mode, and SUPERBOOST active rate boosting topology is adopted to convert the voltage of a 100V solar cell array into the voltage of a 400V full regulation bus, so that the photovoltaic module with 5kW output power is an important component of the photovoltaic module with the 400V full regulation bus.
In the invention, the 300V energy storage module adopts a storage battery management system to carry out storage battery health detection, the capacity is configured according to actual requirements, the storage battery is output to a 400V full-regulation bus after being regulated by a charging and discharging unit, and the storage battery is directly output to a 300V unregulated pulse bus without regulation, which is an important component of the invention.
When the photovoltaic module of the local 100kW power supply system can not meet the local load requirement, the external power supply system provides grid-connected input power to the local platform bus, and the maximum input power is 5 kW; when the photovoltaic module of the local 100kW power supply system is larger than the local load demand and rich power exists, grid-connected power can be output to the external power supply system, and the maximum output power is 5 kW. The 400V full-regulation platform bus of the local 100kW power system is used as a backup of a 300V non-regulation bus, the 400V full-regulation bus can supply power to a non-regulation bus load through switching of the control switch, and the peak power is 20 kW. The 5kW grid-connected module adopts the modular design, and is connected in parallel by 3 two-way power modules with the output power of 2.5 kW. The power module adopts a bidirectional full-bridge main power topology, adopts magnetic feedback and bidirectional current detection to realize closed-loop feedback control, and realizes bidirectional power conversion between two 100kW power systems, thereby being an important component of the invention.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A hundred kilowatt-class spacecraft fully regulated power supply system, comprising: more than one photovoltaic module connected in parallel is connected into a 400V full-regulation bus; the storage battery in more than one energy storage module connected in parallel is connected into a 400V full-regulation bus after being charged and discharged, and the storage battery is directly connected into a 300V non-regulation pulse power bus; more than one parallel grid-connected module is connected with a 400V full-regulation bus and a 300V unregulated pulse power bus, so that bidirectional conversion between the two buses is realized; and the comprehensive scheduling management module calls the photovoltaic module, the energy storage module and the grid-connected module in a grading and layering manner according to the power generation capacity and the load demand.
2. The system of claim 1, wherein the photovoltaic module is composed of a solar cell array and a power regulator, the power regulator performs power regulation and voltage conversion on the output power of the solar cell array, a 400V full-regulation bus is output, and a single photovoltaic module outputs fixed power.
3. The system of claim 1, wherein the energy storage module is comprised of a battery, a battery management system, and a charging and discharging unit; the voltage of the storage battery pack is set to 300V, and the capacity is configured according to the requirement; the storage battery management system is responsible for monitoring and maintaining the health state of the storage battery, and performing temperature control management, balance management and fault reconstruction management on the storage battery; the charging and discharging unit is responsible for carrying out voltage conversion and power regulation on the input and output power of the storage battery, so that the charging and discharging management of the storage battery is realized;
after being regulated by the charging and discharging unit, the energy storage module is connected with a 400V full-regulation bus, and is not regulated by the charging and discharging unit, and the storage battery is directly connected with a 300V unregulated pulse power bus;
a single energy storage module outputs fixed power, more than one energy storage modules are connected in parallel and respectively output to a 400V full-regulation bus and a 300V non-regulation pulse power bus.
4. The system of claim 1, wherein the grid-connected module is connected with a 400V full-regulated bus and a 300V unregulated pulsed power bus simultaneously, and realizes grid-connected reconfiguration between the 400V full-regulated bus and the 300V unregulated pulsed power bus or between two hundred kilowatt spacecraft full-regulated power systems.
5. The system of claim 1, wherein the comprehensive scheduling management module calls the photovoltaic module, the energy storage module and the grid-connected module in a hierarchical and hierarchical manner according to the power generation capacity and the load demand, and specifically comprises:
when the power supply system runs, firstly, the photovoltaic modules are called to supply power, and the number of the photovoltaic modules participating in power supply is increased along with the increase of the load; when the photovoltaic modules are all called and the load requirements cannot be met, the energy storage modules are started to be called, and the number of the energy storage modules participating in power supply is increased along with the increase of the load; when the photovoltaic modules and the energy storage modules are all called and the load requirements still cannot be met, calling the grid-connected modules is started, and the number of the grid-connected modules participating in power supply is gradually increased along with the increase of the load until all the grid-connected modules are called.
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