CN108258720B - Double-bus energy grid-connected topological structure and grid-connected control method thereof - Google Patents
Double-bus energy grid-connected topological structure and grid-connected control method thereof Download PDFInfo
- Publication number
- CN108258720B CN108258720B CN201711434541.5A CN201711434541A CN108258720B CN 108258720 B CN108258720 B CN 108258720B CN 201711434541 A CN201711434541 A CN 201711434541A CN 108258720 B CN108258720 B CN 108258720B
- Authority
- CN
- China
- Prior art keywords
- battery pack
- storage battery
- grid
- load
- solar cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title abstract description 10
- 239000004065 semiconductor Substances 0.000 claims abstract description 22
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 21
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 238000005286 illumination Methods 0.000 claims description 30
- 230000001276 controlling effect Effects 0.000 claims description 26
- 238000007599 discharging Methods 0.000 claims description 13
- 238000003079 width control Methods 0.000 claims description 13
- 230000001502 supplementing effect Effects 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 208000032953 Device battery issue Diseases 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- H02J3/385—
-
- 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
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements 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 and source when the main path fails, e.g. transformers, busbars
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses a double-bus energy grid-connected topological structure and a grid-connected control method thereof, wherein the grid-connected topological structure comprises the following steps: the system comprises a platform bus energy component, a load bus energy component and a grid-connected control unit; the grid-connected control unit is respectively connected with the platform bus energy assembly and the load bus energy assembly through the platform bus and the load bus; the platform bus energy component is used for adopting a direct energy transmission system to adjust power and supply power to the platform equipment; the load bus energy assembly is used for realizing the maximization of power supply energy of the load bus energy assembly by adopting a solar array maximum power tracking system and supplying power to high-power output load equipment; and the grid-connected control unit is used for adjusting and mutually allocating energy between the platform bus energy component and the load bus energy component by adopting a power MOS (metal oxide semiconductor) tube-based impedance pulse width adjusting system. The problem of short-time high-power supply stability of the load in the micro-nano satellite single bus power supply system is solved.
Description
Technical Field
The invention belongs to the technical field of micro-nano satellite energy systems, and particularly relates to a double-bus energy grid-connected topological structure and a grid-connected control method thereof.
Background
At present, the micro-nano satellite development gradually starts from tests to various applications, under the condition that the mass and the volume of the whole satellite are limited, the required load power output level is higher and higher, so that higher requirements are provided for the design of a satellite energy power supply and distribution system, the energy power supply and distribution system can better adapt to the requirement of load short-time high-power output under the condition that the long-term power consumption requirement of platform equipment is met, and the power supply stability of the system is met.
Disclosure of Invention
The technical problem of the invention is solved: the defects of the prior art are overcome, the double-bus energy grid-connected topological structure and the grid-connected control method thereof are provided, the problem of short-time high-power supply stability of a load in a micro-nano satellite single-bus power supply system is solved, and the dynamic change of the load in various working modes of the satellite is adapted.
In order to solve the technical problem, the invention discloses a double-bus energy grid-connected topological structure, which comprises: the system comprises a platform bus energy component, a load bus energy component and a grid-connected control unit; the grid-connected control unit is arranged between the platform bus energy assembly and the load bus energy assembly and is respectively connected with the platform bus energy assembly and the load bus energy assembly through the platform bus and the load bus;
the platform bus energy component is used for adopting a direct energy transmission system to adjust power and supply power to the platform equipment;
the load bus energy assembly is used for realizing the maximization of power supply energy of the load bus energy assembly by adopting a solar array maximum power tracking system and supplying power to high-power output load equipment;
and the grid-connected control unit is used for adjusting and mutually allocating energy between the platform bus energy component and the load bus energy component by adopting a power MOS (metal oxide semiconductor) tube-based impedance pulse width adjusting system.
In the above-mentioned double bus energy grid-connected topology, platform bus energy component includes: the device comprises a first solar cell array, a shunt adjusting unit, a first storage battery pack and a secondary power supply module;
the first solar cell array, the shunt regulating unit and the first storage battery pack are connected in parallel to form a parallel circuit structure;
the parallel circuit structure is connected with the secondary power supply module through the platform bus to form a power supply loop.
In the above-mentioned double bus energy grid-connected topology, load bus energy component includes: the MPPT module is connected with the second storage battery pack;
and after being connected with the MPPT module in series, the second solar cell array is connected with a second storage battery in parallel, and the grid-connected control unit is used as a load bus branch and connected with the platform bus in parallel.
In the above-mentioned double bus energy grid-connected topology structure, the grid-connected control unit includes: the power supply device comprises a first relay, a second relay, a control lower computer, a first P-channel power MOS tube, a second P-channel power MOS tube, a first driving circuit and a second driving circuit;
the first relay and the first P-channel power MOS tube are connected in series between the platform bus and the load bus;
the second relay and the second P-channel power MOS tube are connected between the load bus and the platform bus in series;
the first driving circuit is connected in series between the first P-channel power MOS tube and the lower control computer;
the second driving circuit is connected in series between the second P-channel power MOS tube and the lower control computer.
In the double-bus energy grid-connected topological structure, the lower computer is controlled to be used for:
when the solar cell array Is in an illumination area, acquiring platform bus voltage V1, load current I1, square array current Is1 of the first solar cell array, charging current Ic1 and discharging current Id1 of the first storage battery pack to obtain a first acquisition signal, and acquiring load bus voltage V2, load current I2, square array current Is2 of the second solar cell array, charging current Ic2 and discharging current Id2 of the second storage battery pack to obtain a second acquisition signal;
determining the energy supply states of the platform bus energy assembly and the load bus energy assembly according to the first acquisition signal and the second acquisition signal;
judging whether the electric quantity of the first storage battery pack and the second storage battery pack is full when the illumination is finished according to the determined energy supply states of the platform bus energy assembly and the load bus energy assembly;
and if determining that any storage battery pack cannot reach the expected full charge when the illumination is finished, starting grid-connected control to realize grid-connected power supply of the platform bus energy assembly and the load bus energy assembly.
In the above-mentioned double bus energy grid-connected topology structure, if it is determined that any storage battery can not reach the electric quantity full expectation when the illumination is finished, then the lower computer is controlled to start the grid-connected control, and when the platform bus energy component and the load bus energy component are supplied with power in a grid-connected manner, the control method includes:
if the difference between the square array current Is2 of the second solar cell array and the load current I2 Is smaller than the expected electric charge capacity of the second storage battery pack, sending a first switch instruction, controlling a first relay to be closed, outputting a PWM (pulse width modulation) signal, adjusting the pulse width modulation duty ratio of the driving end of the first P-channel power MOS (metal oxide semiconductor) transistor, and controlling the magnitude of grid-connected current Ip, so that the first solar cell array supplies power to the second storage battery pack through a grid-connected control unit, and the first solar cell array and the second solar cell array realize the combined charging of the second storage battery pack;
if the sum of the square matrix current Is2 of the second solar cell array and the discharge current Id2 of the second storage battery pack Is smaller than the current demand of the load equipment, a first switch instruction Is sent to control the first relay to be closed, a PWM (pulse width modulation) signal Is output, the pulse width modulation duty ratio of the driving end of the first P-channel power MOS (metal oxide semiconductor) tube Is adjusted, and the magnitude of grid connection current Ip Is controlled, so that the first solar cell array supplies power to the load equipment through the grid connection control unit, and the combined power supply of the second solar cell array, the second storage battery pack and the first solar cell array to the load equipment Is realized.
In the above-mentioned double bus energy grid-connected topology, be used for:
when the solar cell array Is in a shadow area, acquiring platform bus voltage V1, load current I1, square array current Is1 of the first solar cell array, charging current Ic1 and discharging current Id1 of the first storage battery pack to obtain a third acquisition signal, and acquiring load bus voltage V2, load current I2, square array current Is2 of the second solar cell array, charging current Ic2 and discharging current Id2 of the second storage battery pack to obtain a fourth acquisition signal;
according to the third acquisition signal and the fourth acquisition signal, respectively calculating the discharge capacity of the first storage battery pack and the second storage battery pack;
judging whether the first storage battery pack in the shadow area can meet the power consumption requirement of the platform equipment under the limitation of the maximum discharge depth according to the discharge capacity of the first storage battery pack; judging whether the second storage battery pack in the shadow region can meet the power consumption requirement of the load equipment under the limitation of the maximum discharge depth according to the discharge capacity of the second storage battery pack;
and if the first storage battery pack in the shadow area cannot meet the power consumption requirement of the platform equipment under the limitation of the maximum discharge depth and/or the second storage battery pack in the shadow area cannot meet the power consumption requirement of the load equipment under the limitation of the maximum discharge depth, starting grid-connected control, and realizing grid-connected power supply of the platform bus energy component and the load bus energy component.
In the above-mentioned double bus energy grid-connected topology structure, if it is determined that the first storage battery in the shadow area cannot satisfy the power consumption requirement of the platform device under the limitation of the maximum depth of discharge and/or it is determined that the second storage battery in the shadow area cannot satisfy the power consumption requirement of the load device under the limitation of the maximum depth of discharge, then the lower computer is controlled to start grid-connected control, and when the grid-connected power supply of the platform bus energy component and the load bus energy component is realized, the lower computer comprises:
if the single discharge of the second storage battery pack in the shadow area exceeds the maximum discharge depth of the second storage battery pack, a third switch instruction is sent to control the first relay to be closed, a PWM (pulse width modulation) signal is output, the pulse width modulation duty ratio of the driving end of the first P-channel power MOS transistor is adjusted, and the magnitude of grid-connected current Ip is controlled, so that the first storage battery pack supplies power to the load equipment through the grid-connected control unit, and the first storage battery pack and the second storage battery pack jointly supply power to the load equipment;
if the depth of discharge of the second storage battery pack in the shadow region exceeds a set threshold value, a fourth switching instruction is sent to control the first relay to be closed, a PWM (pulse width modulation) signal is output, the pulse width modulation duty ratio of the driving end of the first P-channel power MOS (metal oxide semiconductor) transistor is adjusted, and the magnitude of grid-connected current Ip is controlled, so that the first storage battery pack supplements and charges the second storage battery pack through the grid-connected control unit.
In the double-bus energy grid-connected topological structure, the lower computer is controlled to be used for:
when the first storage battery pack is in fault and in a shadow area, whether the surplus electric quantity of the second storage battery pack meets the requirement of the maximum discharge depth of the second storage battery pack is determined, when the surplus electric quantity of the second storage battery pack meets the requirement of the maximum discharge depth of the second storage battery pack, the second relay is controlled to be closed, a PWM (pulse width modulation) pulse width control signal is output, the pulse width modulation duty ratio of the driving end of the second P-channel power MOS (metal oxide semiconductor) tube is adjusted, and the magnitude of grid-connected current Ip is controlled, so that the second storage battery pack supplies power to the platform equipment through the grid-connected control unit; if the solar cell array is in the illumination area, when the first solar cell array meets the power supply requirement of the platform equipment, controlling a first relay to be closed, outputting a PWM (pulse width modulation) wave pulse width control signal, adjusting the pulse width modulation duty ratio of the driving end of a first P-channel power MOS (metal oxide semiconductor) transistor, and controlling the magnitude of grid-connected current Ip so as to enable the first solar cell array to supply power for the load equipment and the second storage battery pack in a supplementing manner, thereby realizing energy balance in the current circle;
when the second storage battery pack has a fault and is in a shadow area, calculating to determine whether the balance electric quantity of the first storage battery pack meets the requirement of the maximum discharge depth of the second storage battery pack, controlling a first relay to be closed when the balance electric quantity of the first storage battery pack meets the requirement of the maximum discharge depth of the second storage battery pack, outputting a PWM (pulse width modulation) pulse width control signal, adjusting the pulse width modulation duty ratio of a driving end of a first P-channel power MOS (metal oxide semiconductor) tube, and controlling the magnitude of grid-connected current Ip so that the first storage battery pack supplies power to load equipment through a grid-connected control unit; if the solar cell array is in the illumination area, when the second solar cell array meets the power supply requirement of the load equipment, controlling a second relay to be closed, outputting a PWM (pulse width modulation) wave pulse width control signal, adjusting the pulse width modulation duty ratio of the driving end of a second P-channel power MOS (metal oxide semiconductor) transistor, and controlling the magnitude of grid-connected current Ip so as to enable the second solar cell array to supply power for the platform equipment and the first storage battery pack in a supplementing manner, and realizing the balance of the first storage battery pack in a shadow area when the first storage battery pack is over-discharged;
when the first solar cell array fails, if the first solar cell array Is in the illumination area, judging whether the square array current Is2 of the second solar cell array meets the power supply requirements of the load equipment and the second storage battery pack; when the second solar cell array square array current Is2 Is determined to meet the power supply requirements of the load equipment and the second storage battery pack, the second relay Is controlled to be closed, a PWM (pulse width modulation) signal Is output, the pulse width modulation duty ratio of the driving end of the second P-channel power MOS transistor Is adjusted, and the magnitude of grid-connected current Ip Is controlled, so that the second solar cell array supplies power to the platform equipment and the first storage battery pack;
when the second solar cell array has a fault, if the second solar cell array Is in the illumination area, judging whether the square array current Is1 of the first solar cell array meets the power supply requirements of the platform equipment and the first storage battery pack; when the first solar cell array square array current Is1 Is determined to meet the power supply requirements of the platform equipment and the first storage battery pack, the first relay Is controlled to be closed, a PWM (pulse width modulation) signal Is output, the pulse width modulation duty ratio of the driving end of the first P-channel power MOS transistor Is adjusted, and the magnitude of grid-connected current Ip Is controlled, so that the first solar cell array supplies power to the load equipment and the second storage battery pack.
Correspondingly, the invention also discloses a grid-connected control method based on the double-bus energy grid-connected topological structure, which comprises the following steps:
the power of the platform bus energy component is adjusted, and a direct energy transmission system is adopted to supply power to the platform equipment;
a solar array maximum power tracking system is adopted to control the power supply energy of the load bus energy component to be maximized and supply power to high-power output load equipment;
and energy regulation is carried out on the platform bus energy component and the load bus energy component through a grid-connected control unit by adopting a power MOS (metal oxide semiconductor) tube-based impedance pulse width regulation system.
The invention has the following advantages:
(1) the requirement of the platform equipment for long-term stable power supply can be met, and the requirement of short-time high-power supply of a load task can also be met under the conditions of miniaturization and light weight of the design of the whole satellite energy system; the bidirectional allocation and self-adaptive control of the energy among the buses of the energy system under various working condition modes are realized, and a new solution is provided for solving the problems of limited power load capacity of the whole satellite, fault maintenance of the energy system and the like.
(2) The satellite power supply system meets the reliability of on-orbit operation and system power supply of the satellite, adapts to the dynamic change characteristic of a special working mode of the satellite, and realizes high-efficiency utilization and dynamic management of energy.
(3) The redundancy of the whole satellite energy system is improved, and fault maintenance of the whole satellite energy system is realized.
Drawings
FIG. 1 is a schematic diagram of a dual bus energy grid-connected topology according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a grid-connected control unit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a first solar array combined with a second solar array to charge a second battery pack in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of a second solar array, a second battery pack, and a first solar array in combination to power a load device, according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a second battery pack in combination with a first battery pack to power a load device in accordance with an embodiment of the present invention;
fig. 6 is a schematic diagram of a first battery pack for recharging a second battery pack in accordance with an embodiment of the present invention;
fig. 7 is a schematic illustration of a shadow second pack failure mode first pack powering a load device in accordance with an embodiment of the present invention;
FIG. 8 is a schematic diagram of a failure mode of a second battery pack in an illumination area and a second solar array to supplement power to the first battery pack and a platform device in accordance with an embodiment of the present invention;
fig. 9 is a schematic diagram of a second solar array failure mode according to an embodiment of the present invention, in which the first solar array supplies power to the second battery pack load.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, common embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, a schematic diagram of a dual-bus energy grid-connected topology according to an embodiment of the present invention is shown. In this embodiment, the double-bus energy grid-connected topology includes: the system comprises a platform bus energy component, a load bus energy component and a grid-connected control unit.
As shown in fig. 1, the grid-connected control unit is disposed between the platform bus energy assembly and the load bus energy assembly, and is connected to the platform bus energy assembly and the load bus energy assembly through the platform bus and the load bus, respectively. The platform bus energy component can be used for adopting a direct energy transmission system to adjust power and supply power to the platform equipment (for a long time); the load bus energy assembly is used for realizing the maximization of power supply energy of the load bus energy assembly by adopting a solar array maximum power tracking system and supplying power to high-power output load equipment (short time); and the grid-connected control unit is used for realizing energy regulation and mutual allocation between the platform bus energy component and the load bus energy component by adopting an impedance pulse width regulation system based on a power MOS (Metal-Oxide-Semiconductor Field-Effect Transistor).
In a preferred embodiment of the present invention, as shown in fig. 1, the platform bus energy assembly may specifically include: the device comprises a first solar cell array (a different-place solar cell array), a shunt adjusting unit, a first storage battery pack (a different-place storage battery pack) and a secondary power supply module. The first solar cell array, the shunt regulating unit and the first storage battery pack are connected in parallel to form a parallel circuit structure; the parallel circuit structure is connected with the secondary power supply module through the platform bus to form a power supply loop.
In a preferred embodiment of the present invention, as shown in fig. 1, the load bus energy source assembly may specifically include: a second solar cell array (local solar cell array), an MPPT (Maximum Power Point Tracking) module, and a second storage battery pack (local storage battery pack). And the grid-connected control unit is used as a load bus branch and is connected in parallel with the platform bus.
In a preferred embodiment of the present invention, referring to fig. 2, a schematic structural diagram of a grid-connected control unit in an embodiment of the present invention is shown. As shown in fig. 2, the grid-connected control unit may specifically include: the power supply device comprises a first relay, a second relay, a control lower computer, a first P-channel power MOS tube, a second P-channel power MOS tube, a first driving circuit and a second driving circuit. The first relay and the first P-channel power MOS tube are connected in series between the platform bus and the load bus; the second relay and the second P-channel power MOS tube are connected between the load bus and the platform bus in series; the first driving circuit is connected in series between the first P-channel power MOS tube and the lower control computer; the second driving circuit is connected in series between the second P-channel power MOS tube and the lower control computer.
Further preferably, as shown in fig. 2, the controlling the lower computer may specifically include: the system comprises a signal acquisition module, a strategy control module and a grid-connected control module. The signal acquisition module is used for acquiring voltage and current of each part of the energy system to obtain acquired signals (such as solar array current, primary bus voltage, load current, charging and discharging current of a storage battery pack and the like). The strategy control module is used for judging whether to start the grid connection of the platform bus energy component and the load bus energy component according to the acquired signals; determining the magnitude and direction of grid-connected current; generating and outputting a switch control instruction for controlling the relay; and generating and outputting a PWM wave pulse width control signal for controlling the pulse width modulation duty ratio of the driving end of the P-channel power MOS tube. And the grid-connected control module is used for controlling the platform bus energy component and the load bus energy component to be connected in a grid mode according to the judgment result of the strategy control module on the acquired signals.
In a preferred embodiment of the present invention, the lower computer is controlled, which may be specifically configured to: when the solar cell array Is in an illumination area, acquiring platform bus voltage V1, load current I1, square array current Is1 of the first solar cell array, charging current Ic1 and discharging current Id1 of the first storage battery pack to obtain a first acquisition signal, and acquiring load bus voltage V2, load current I2, square array current Is2 of the second solar cell array, charging current Ic2 and discharging current Id2 of the second storage battery pack to obtain a second acquisition signal; determining the energy supply states of the platform bus energy assembly and the load bus energy assembly according to the first acquisition signal and the second acquisition signal; judging whether the electric quantity of the first storage battery pack and the second storage battery pack is full when the illumination is finished according to the determined energy supply states of the platform bus energy assembly and the load bus energy assembly; and if determining that any storage battery pack cannot reach the expected full charge when the illumination is finished, starting grid-connected control to realize grid-connected power supply of the platform bus energy assembly and the load bus energy assembly.
In this embodiment, the energy supply status of the platform bus energy assembly and the load bus energy assembly may be determined by:
platform bus energy assembly energy supply state 1: assuming that the working time of the whole satellite sun-shine area is T1, the residual capacity of the first storage battery pack is Ql1 when the first storage battery pack enters the sun-shine area from the shadow area, the full charge capacity is designed to be Qf1, and the charging current Ic1(T) of the first storage battery pack meets the requirement
When the solar storage battery pack Is used, the first storage battery pack can be fully charged in the sun region through the self output current Is1 of the first solar array, namely the current-circle energy balance of the first storage battery pack Is realized, and at the moment, the platform energy assembly does not need to be supplied with supplementary power by a grid-connected control unit.
Platform bus energy assembly energy supply state 2: the charging current Ic1(t) of the first battery pack satisfies
When the solar storage battery pack Is used, the fact that the first storage battery pack cannot be fully charged in the sun region through the self output current Is1 of the first solar array means that the energy balance of the first storage battery pack in the circle cannot be achieved, and at the moment, the platform energy assembly needs to be supplied with supplementary power through a load bus through a grid-connected control unit;
the same principle is that:
load bus energy assembly energy supply state 1: assuming that the whole-satellite sun-shine area has the working time of T1, the second storage battery pack enters the sun shine area from the shadow areaThe zone time residual capacity is Ql2, the full charge capacity is designed to be Qf2, and the charging current Ic2(t) of the first storage battery pack meets the requirement
When the second storage battery pack Is charged, the second storage battery pack can be fully charged through the self output current Is2 of the second solar array in the sunlight area, namely the current-circle energy balance of the second storage battery pack Is realized, and at the moment, the load energy assembly does not need to be supplied with supplementary power by a grid-connected control unit.
Load bus energy assembly energy supply state 2: the charging current Ic2(t) of the second battery pack satisfies
When the load energy assembly Is in use, the second storage battery pack cannot be fully charged in the sun region through the self output current Is2 of the second solar array, namely the energy balance of the second storage battery pack in the circle cannot be realized, and at the moment, the load energy assembly needs to be supplied with supplementary power through the platform bus through the grid-connected control unit.
In this embodiment, whether the first storage battery pack and the second storage battery pack are fully charged at the end of illumination can be determined as follows:
as described above, when the platform bus energy assembly is in its energy supply state 1, it may be determined that the first battery pack is capable of being fully charged at the end of illumination; when the platform bus energy assembly is in its energy supply state 2, it can be determined that the first battery pack is not fully charged at the end of the illumination. Similarly, when the load bus energy assembly is in the energy supply state 1, the second storage battery pack can be judged to be full when the illumination is finished; when the load bus energy assembly is in its energy supply state 2, it can be determined that the second battery pack is not fully charged at the end of the light.
In this embodiment, the grid-tie control may be turned on as follows:
if the difference between the square matrix current Is2 of the second solar cell array and the load current I2 Is smaller than the expected electric charge capacity of the second storage battery pack, a first switch instruction Is sent to control the first relay to be closed, a PWM wave pulse width control signal Is output, the pulse width modulation duty ratio of the driving end of the first P-channel power MOS transistor Is adjusted, and the magnitude of the grid-connected current Ip Is controlled, so that the first solar cell array supplies power to the second storage battery pack through the grid-connected control unit, and the first solar cell array and the second solar cell array realize the combined charging of the second storage battery pack, as shown in fig. 3.
If the sum of the square matrix current Is2 of the second solar cell array and the discharge current Id2 of the second storage battery pack Is smaller than the current demand of the load device, a first switch instruction Is sent to control the first relay to be closed, a PWM (pulse width modulation) signal Is output, the pulse width modulation duty ratio of the driving end of the first P-channel power MOS (metal oxide semiconductor) transistor Is adjusted, and the magnitude of grid connection current Ip Is controlled, so that the first solar cell array supplies power to the load device through the grid connection control unit, and the combined power supply of the second solar cell array, the second storage battery pack and the first solar cell array to the load device Is achieved, as shown in fig. 4.
In a preferred embodiment of the present invention, the lower computer is controlled, which may be specifically configured to: when the solar cell array Is in a shadow area, acquiring platform bus voltage V1, load current I1, square array current Is1 of the first solar cell array, charging current Ic1 and discharging current Id1 of the first storage battery pack to obtain a third acquisition signal, and acquiring load bus voltage V2, load current I2, square array current Is2 of the second solar cell array, charging current Ic2 and discharging current Id2 of the second storage battery pack to obtain a fourth acquisition signal; according to the third acquisition signal and the fourth acquisition signal, respectively calculating the discharge capacity of the first storage battery pack and the second storage battery pack; judging whether the first storage battery pack in the shadow area can meet the power consumption requirement of the platform equipment under the limitation of the maximum discharge depth according to the discharge capacity of the first storage battery pack; judging whether the second storage battery pack in the shadow region can meet the power consumption requirement of the load equipment under the limitation of the maximum discharge depth according to the discharge capacity of the second storage battery pack; and if the first storage battery pack in the shadow area cannot meet the power consumption requirement of the platform equipment under the limitation of the maximum discharge depth and/or the second storage battery pack in the shadow area cannot meet the power consumption requirement of the load equipment under the limitation of the maximum discharge depth, starting grid-connected control, and realizing grid-connected power supply of the platform bus energy component and the load bus energy component.
In the present embodiment, the discharge amounts of the first battery pack and the second battery pack can be calculated separately as follows:
assuming that the working time of the whole star shadow region is T2, the design full charge is Qf1, and the maximum discharge depth is Do 1%, the pre-discharge capacity of the first storage battery pack is
If it is
The pre-discharge amount of the first storage battery pack meets the requirement of the maximum discharge depth of the first storage battery pack, and the first storage battery pack does not need to be subjected to supplementary charging through a grid-connected control unit. If it is
The pre-discharge amount of the first storage battery pack exceeds the maximum discharge depth requirement of the first storage battery pack, and the first storage battery pack needs to be subjected to supplementary charging through a load bus through a grid-connected control unit.
The same principle is that:
the full charge of the second storage battery pack is Qf2, the maximum discharge depth is Do 2%, and the pre-discharge capacity of the second storage battery pack is
If it is
The second storage battery pack pre-discharge amount meets the requirement of the maximum discharge depth of the second storage battery pack, and the second storage battery pack does not need to be subjected to supplementary charging through a grid-connected control unit. If it is
The pre-discharge amount of the second storage battery pack exceeds the maximum discharge depth requirement of the second storage battery pack, and the second storage battery pack needs to be subjected to supplementary charging through the platform bus through the grid-connected control unit.
In this embodiment, the grid-tie control may be turned on as follows:
if the single discharge of the second storage battery pack in the shadow area exceeds the maximum discharge depth of the second storage battery pack, a third switch instruction is sent to control the first relay to be closed, a PWM (pulse width modulation) signal is output, the pulse width modulation duty ratio of the driving end of the first P-channel power MOS transistor is adjusted, and the magnitude of grid-connected current Ip is controlled, so that the first storage battery pack supplies power to the load equipment through the grid-connected control unit, and the combined power supply of the first storage battery pack and the second storage battery pack to the load equipment is realized, as shown in fig. 5.
If the depth of discharge of the second storage battery pack in the shadow area exceeds a set threshold, a fourth switching instruction is sent to control the first relay to be closed, a PWM (pulse width modulation) signal is output, the pulse width modulation duty ratio of the driving end of the first P-channel power MOS transistor is adjusted, and the magnitude of grid-connected current Ip is controlled, so that the first storage battery pack supplements and charges the second storage battery pack through the grid-connected control unit, as shown in fig. 6.
In a preferred embodiment of the present invention, the lower computer is controlled, which may be specifically configured to:
when the first battery pack is in fault:
and if the second storage battery pack is in a shadow region, determining whether the balance electric quantity of the second storage battery pack meets the requirement of the maximum discharge depth of the second storage battery pack, controlling a second relay to be closed when the balance electric quantity of the second storage battery pack meets the requirement of the maximum discharge depth of the second storage battery pack, outputting a PWM (pulse width modulation) signal, adjusting the PWM duty ratio of the driving end of the second P-channel power MOS (metal oxide semiconductor) tube, and controlling the magnitude of grid-connected current Ip so that the second storage battery pack supplies power to the platform equipment through the grid-connected control unit.
If the solar cell array is in the illumination area, when the first solar cell array meets the power supply requirement of the platform equipment, the first relay is controlled to be closed, a PWM (pulse width modulation) wave pulse width control signal is output, the pulse width modulation duty ratio of the driving end of the first P-channel power MOS transistor is adjusted, and the magnitude of grid-connected current Ip is controlled, so that the first solar cell array supplies power to the load equipment and the second storage battery pack in a supplementing mode, and the energy balance in the current circle is achieved.
When the second battery pack is in fault:
if the first storage battery pack is in a shadow area, calculating to determine whether the balance electric quantity of the first storage battery pack meets the requirement of the maximum discharge depth of the first storage battery pack, controlling a first relay to be closed when the balance electric quantity of the first storage battery pack meets the requirement of the maximum discharge depth of the first storage battery pack, outputting a PWM (pulse width modulation) signal, adjusting the PWM duty ratio of the driving end of the first P-channel power MOS (metal oxide semiconductor) tube, and controlling the magnitude of grid-connected current Ip so that the first storage battery pack supplies power to load equipment through a grid-connected control unit, as shown in fig. 7.
If the solar battery array is in the illumination area, when the second solar battery array meets the power supply requirement of the load device, the second relay is controlled to be closed, a PWM (pulse width modulation) wave pulse width control signal is output, the pulse width modulation duty ratio of the driving end of the second P-channel power MOS transistor is adjusted, and the magnitude of grid-connected current Ip is controlled, so that the second solar battery array supplies power to the platform device and the first storage battery pack in a supplementing manner, and the first storage battery pack is balanced when the first storage battery pack is over-discharged in the shadow area, as shown in fig. 8.
In a preferred embodiment of the present invention, the lower computer is controlled, which may be specifically configured to:
when the first solar cell array fails:
if the solar cell array Is in the illumination area, judging whether the square array current Is2 of the second solar cell array meets the power supply requirements of the load equipment and the second storage battery pack; and when determining that the second solar cell array square array current Is2 meets the power supply requirements of the load equipment and the second storage battery pack, controlling the second relay to be closed, outputting a PWM (pulse width modulation) signal, adjusting the pulse width modulation duty ratio of the driving end of the second P-channel power MOS transistor, and controlling the magnitude of grid-connected current Ip so as to enable the second solar cell array to supply power for the platform equipment and the first storage battery pack.
When the second solar cell array fails:
if the solar cell array Is in the illumination area, judging whether the square array current Is1 of the first solar cell array meets the power supply requirements of the platform equipment and the first storage battery pack; when it Is determined that the first solar cell array square array current Is1 meets the power supply requirements of the platform device and the first storage battery pack, the first relay Is controlled to be closed, a pulse width control signal of a PWM (pulse width modulation) wave Is output, the pulse width modulation duty ratio of the driving end of the first P-channel power MOS transistor Is adjusted, and the magnitude of grid-connected current Ip Is controlled, so that the first solar cell array supplies power to the load device and the second storage battery pack, as shown in FIG. 9.
Based on the embodiment, the invention also discloses a grid-connected control method based on the double-bus energy grid-connected topological structure. The grid-connected control method based on the double-bus energy grid-connected topological structure comprises the following steps: the power of the platform bus energy component is adjusted, and a direct energy transmission system is adopted to supply power to the platform equipment; a solar array maximum power tracking system is adopted to control the power supply energy of the load bus energy component to be maximized and supply power to high-power output load equipment; and energy regulation is carried out on the platform bus energy component and the load bus energy component through a grid-connected control unit by adopting a power MOS (metal oxide semiconductor) tube-based impedance pulse width regulation system.
In a preferred embodiment of the present invention, the grid-connected control method based on the double-bus energy grid-connected topology may specifically include the following control strategies:
and (3) a normal mode:
the first mode is as follows: the first solar cell array supplies power to the platform equipment and the first storage battery pack; the second solar cell array is a load device and a second storage battery.
And the grid-connected control unit calculates the power supply power of the first solar cell array (the second solar cell array) and judges whether the first storage battery pack (the second storage battery pack) can be fully charged at the end of illumination.
If the power supply power of the first solar cell array (the second solar cell array) meets the following requirements: when the power consumption requirement of the platform equipment (load equipment) is met, the first storage battery pack (second storage battery pack) can be fully charged with expectations, the platform bus energy assembly and the load bus energy assembly are controlled to work in an independent power supply working mode, and at the moment, the grid-connected control unit is disconnected and does not work.
If the power supply power of the first solar cell array (the second solar cell array) can not satisfy: when the power consumption requirement of the platform equipment (load equipment) is met and the first storage battery pack (second storage battery pack) is full of expectations, the grid-connected control unit is started to control the platform bus energy assembly and the load bus energy assembly to be connected to the grid.
In the present embodiment, grid connection is divided into two cases:
case 1: when the power output of one bus solar array cannot meet the local load requirement, grid connection is started, the other bus allopatric solar array supplies power for the local load through the grid connection control unit, and when the local load short-term power requirement is large, the allopatric solar array needs to supply power for the load through the combination of the grid connection control unit, the local solar array and the local storage battery pack.
Case 2: when the power output of one bus solar array meets the local load requirement and cannot meet the requirement that the local storage battery pack is full of electricity, starting a grid-connected control unit, and charging the storage battery pack from the other bus allopatric solar array through the combination of the grid-connected control unit and the local solar array;
and a second mode: in the shadow area, two storage battery packs supply power for respective loads, the lower computer under grid-connected control judges whether the current electric quantity of the storage battery packs can meet the power consumption requirements of the respective loads under the limitation of the maximum discharge depth by calculating the current discharge electric energy of the storage battery packs, if one of the storage battery packs can not meet the high power consumption requirement of the local load, a grid-connected control unit is started, the other storage battery pack at a different position of the bus is combined with the local storage battery pack by the grid-connected control unit to supply power for the local load, and the premise of grid-connected is that the discharge depth of the storage battery pack at; in addition, if the situation that the discharge depth of the local storage battery pack is too large due to load power consumption occurs, in order to ensure that the local storage battery pack can normally work in an illumination area, the current circle is balanced, the grid-connected control unit can be started, and the local storage battery pack is charged additionally by the storage battery pack in different places.
Failure mode:
battery failure mode: in the shadow area, when the local storage battery pack cannot discharge, the grid-connected control lower computer inquires whether the surplus electric quantity of the different-place storage battery pack meets the maximum discharge depth limit of the different-place storage battery pack, if so, a grid-connected control unit is started, and the different-place storage battery pack supplies power for the local load; in the sun region, if the local storage battery pack fails and cannot be charged, the grid-connected control unit can be started to allocate the redundant power of the local solar array to a different-place load for power supply of the storage battery pack.
Solar array failure mode: the local solar array is in fault or the power supply capacity is greatly reduced, so that the local storage battery pack cannot complete charging and balance in a current circle, even the discharge depth of the storage battery is further increased, and after the grid-connected control lower computer judges that the power supply requirements of the loads in different places and the charging requirements of the storage battery are met, the grid-connected control unit is started to realize the complementary power supply of the solar array in different places for the local loads and the storage battery.
The grid-connected strategy of each working mode is simultaneously suitable for the platform bus energy component and the load bus energy component, and only corresponding grid-connected strategy control is needed to be carried out on the relay and the P-channel power MOS tube.
The embodiments in the present description are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above description is only for the best mode of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Those skilled in the art will appreciate that the invention may be practiced without these specific details.
Claims (7)
1. A double-bus energy grid-connected topological structure is characterized by comprising: the system comprises a platform bus energy component, a load bus energy component and a grid-connected control unit; the grid-connected control unit is arranged between the platform bus energy assembly and the load bus energy assembly and is respectively connected with the platform bus energy assembly and the load bus energy assembly through the platform bus and the load bus;
the platform bus energy component is used for adopting a direct energy transmission system to adjust power and supply power to the platform equipment;
the load bus energy assembly is used for realizing the maximization of power supply energy of the load bus energy assembly by adopting a solar array maximum power tracking system and supplying power to high-power output load equipment;
the grid-connected control unit is used for adjusting and mutually allocating energy between the platform bus energy component and the load bus energy component by adopting a power MOS tube-based impedance pulse width adjusting system;
wherein, the control unit that is incorporated into the power networks includes: the power supply device comprises a first relay, a second relay, a control lower computer, a first P-channel power MOS tube, a second P-channel power MOS tube, a first driving circuit and a second driving circuit; the first relay and the first P-channel power MOS tube are connected in series between the platform bus and the load bus; the second relay and the second P-channel power MOS tube are connected between the load bus and the platform bus in series; the first driving circuit is connected in series between the first P-channel power MOS tube and the lower control computer; the second driving circuit is connected in series between the second P-channel power MOS tube and the lower control computer;
the lower computer is controlled to: when the solar cell array Is in an illumination area, acquiring platform bus voltage V1, load current I1, square array current Is1 of the first solar cell array, charging current Ic1 and discharging current Id1 of the first storage battery pack to obtain a first acquisition signal, and acquiring load bus voltage V2, load current I2, square array current Is2 of the second solar cell array, charging current Ic2 and discharging current Id2 of the second storage battery pack to obtain a second acquisition signal; determining the energy supply states of the platform bus energy assembly and the load bus energy assembly according to the first acquisition signal and the second acquisition signal; judging whether the electric quantity of the first storage battery pack and the second storage battery pack is full when the illumination is finished according to the determined energy supply states of the platform bus energy assembly and the load bus energy assembly; and if determining that any storage battery pack cannot reach the expected full charge when the illumination is finished, starting grid-connected control to realize grid-connected power supply of the platform bus energy assembly and the load bus energy assembly.
2. The dual bus energy grid-connected topology of claim 1, wherein the platform bus energy assembly comprises: the device comprises a first solar cell array, a shunt adjusting unit, a first storage battery pack and a secondary power supply module;
the first solar cell array, the shunt regulating unit and the first storage battery pack are connected in parallel to form a parallel circuit structure;
the parallel circuit structure is connected with the secondary power supply module through the platform bus to form a power supply loop.
3. The dual bus energy grid-connected topology of claim 1, wherein the load bus energy assembly comprises: the MPPT module is connected with the second storage battery pack;
and after being connected with the MPPT module in series, the second solar cell array is connected with a second storage battery in parallel, and the grid-connected control unit is used as a load bus branch and connected with the platform bus in parallel.
4. The double-bus energy grid-connected topological structure according to claim 1, wherein the control lower computer starts grid-connected control if it is determined that any storage battery pack cannot reach the expected full charge when illumination is finished, and when the platform bus energy assembly and the load bus energy assembly are supplied with power in a grid-connected mode, the control lower computer comprises:
if the difference between the square array current Is2 of the second solar cell array and the load current I2 Is smaller than the expected electric charge capacity of the second storage battery pack, sending a first switch instruction, controlling a first relay to be closed, outputting a PWM (pulse width modulation) signal, adjusting the pulse width modulation duty ratio of the driving end of the first P-channel power MOS (metal oxide semiconductor) transistor, and controlling the magnitude of grid-connected current Ip, so that the first solar cell array supplies power to the second storage battery pack through a grid-connected control unit, and the first solar cell array and the second solar cell array realize the combined charging of the second storage battery pack;
if the sum of the square matrix current Is2 of the second solar cell array and the discharge current Id2 of the second storage battery pack Is smaller than the current demand of the load equipment, a first switch instruction Is sent to control the first relay to be closed, a PWM (pulse width modulation) signal Is output, the pulse width modulation duty ratio of the driving end of the first P-channel power MOS (metal oxide semiconductor) tube Is adjusted, and the magnitude of grid connection current Ip Is controlled, so that the first solar cell array supplies power to the load equipment through the grid connection control unit, and the combined power supply of the second solar cell array, the second storage battery pack and the first solar cell array to the load equipment Is realized.
5. The double-bus energy grid-connected topological structure according to claim 1, wherein the lower computer is controlled to:
when the solar cell array Is in a shadow area, acquiring platform bus voltage V1, load current I1, square array current Is1 of the first solar cell array, charging current Ic1 and discharging current Id1 of the first storage battery pack to obtain a third acquisition signal, and acquiring load bus voltage V2, load current I2, square array current Is2 of the second solar cell array, charging current Ic2 and discharging current Id2 of the second storage battery pack to obtain a fourth acquisition signal;
according to the third acquisition signal and the fourth acquisition signal, respectively calculating the discharge capacity of the first storage battery pack and the second storage battery pack;
judging whether the first storage battery pack in the shadow area can meet the power consumption requirement of the platform equipment under the limitation of the maximum discharge depth according to the discharge capacity of the first storage battery pack; judging whether the second storage battery pack in the shadow region can meet the power consumption requirement of the load equipment under the limitation of the maximum discharge depth according to the discharge capacity of the second storage battery pack;
and if the first storage battery pack in the shadow area cannot meet the power consumption requirement of the platform equipment under the limitation of the maximum discharge depth and/or the second storage battery pack in the shadow area cannot meet the power consumption requirement of the load equipment under the limitation of the maximum discharge depth, starting grid-connected control, and realizing grid-connected power supply of the platform bus energy component and the load bus energy component.
6. The double-bus energy grid-connected topological structure according to claim 5, wherein the lower computer is controlled to start grid-connected control if it is determined that the first storage battery pack in the shadow area cannot meet the power consumption requirement of the platform device under the limitation of the maximum discharge depth and/or it is determined that the second storage battery pack in the shadow area cannot meet the power consumption requirement of the load device under the limitation of the maximum discharge depth, and when the grid-connected power supply of the platform bus energy component and the load bus energy component is realized, the double-bus energy grid-connected topological structure comprises:
if the single discharge of the second storage battery pack in the shadow area exceeds the maximum discharge depth of the second storage battery pack, a third switch instruction is sent to control the first relay to be closed, a PWM (pulse width modulation) signal is output, the pulse width modulation duty ratio of the driving end of the first P-channel power MOS transistor is adjusted, and the magnitude of grid-connected current Ip is controlled, so that the first storage battery pack supplies power to the load equipment through the grid-connected control unit, and the first storage battery pack and the second storage battery pack jointly supply power to the load equipment;
if the depth of discharge of the second storage battery pack in the shadow region exceeds a set threshold value, a fourth switching instruction is sent to control the first relay to be closed, a PWM (pulse width modulation) signal is output, the pulse width modulation duty ratio of the driving end of the first P-channel power MOS (metal oxide semiconductor) transistor is adjusted, and the magnitude of grid-connected current Ip is controlled, so that the first storage battery pack supplements and charges the second storage battery pack through the grid-connected control unit.
7. The double-bus energy grid-connected topological structure according to claim 1, wherein the lower computer is controlled to:
when the first storage battery pack is in fault and in a shadow area, whether the surplus electric quantity of the second storage battery pack meets the requirement of the maximum discharge depth of the second storage battery pack is determined, when the surplus electric quantity of the second storage battery pack meets the requirement of the maximum discharge depth of the second storage battery pack, the second relay is controlled to be closed, a PWM (pulse width modulation) pulse width control signal is output, the pulse width modulation duty ratio of the driving end of the second P-channel power MOS (metal oxide semiconductor) tube is adjusted, and the magnitude of grid-connected current Ip is controlled, so that the second storage battery pack supplies power to the platform equipment through the grid-connected control unit; if the solar cell array is in the illumination area, when the first solar cell array meets the power supply requirement of the platform equipment, controlling a first relay to be closed, outputting a PWM (pulse width modulation) wave pulse width control signal, adjusting the pulse width modulation duty ratio of the driving end of a first P-channel power MOS (metal oxide semiconductor) transistor, and controlling the magnitude of grid-connected current Ip so as to enable the first solar cell array to supply power for the load equipment and the second storage battery pack in a supplementing manner, thereby realizing energy balance in the current circle;
when the second storage battery pack has a fault and is in a shadow area, calculating to determine whether the balance electric quantity of the first storage battery pack meets the requirement of the maximum discharge depth of the second storage battery pack, controlling a first relay to be closed when the balance electric quantity of the first storage battery pack meets the requirement of the maximum discharge depth of the second storage battery pack, outputting a PWM (pulse width modulation) pulse width control signal, adjusting the pulse width modulation duty ratio of a driving end of a first P-channel power MOS (metal oxide semiconductor) tube, and controlling the magnitude of grid-connected current Ip so that the first storage battery pack supplies power to load equipment through a grid-connected control unit; if the solar cell array is in the illumination area, when the second solar cell array meets the power supply requirement of the load equipment, controlling a second relay to be closed, outputting a PWM (pulse width modulation) wave pulse width control signal, adjusting the pulse width modulation duty ratio of the driving end of a second P-channel power MOS (metal oxide semiconductor) transistor, and controlling the magnitude of grid-connected current Ip so as to enable the second solar cell array to supply power for the platform equipment and the first storage battery pack in a supplementing manner, and realizing the balance of the first storage battery pack in a shadow area when the first storage battery pack is over-discharged;
when the first solar cell array fails, if the first solar cell array Is in the illumination area, judging whether the square array current Is2 of the second solar cell array meets the power supply requirements of the load equipment and the second storage battery pack; when the second solar cell array square array current Is2 Is determined to meet the power supply requirements of the load equipment and the second storage battery pack, the second relay Is controlled to be closed, a PWM (pulse width modulation) signal Is output, the pulse width modulation duty ratio of the driving end of the second P-channel power MOS transistor Is adjusted, and the magnitude of grid-connected current Ip Is controlled, so that the second solar cell array supplies power to the platform equipment and the first storage battery pack;
when the second solar cell array has a fault, if the second solar cell array Is in the illumination area, judging whether the square array current Is1 of the first solar cell array meets the power supply requirements of the platform equipment and the first storage battery pack; when the first solar cell array square array current Is1 Is determined to meet the power supply requirements of the platform equipment and the first storage battery pack, the first relay Is controlled to be closed, a PWM (pulse width modulation) signal Is output, the pulse width modulation duty ratio of the driving end of the first P-channel power MOS transistor Is adjusted, and the magnitude of grid-connected current Ip Is controlled, so that the first solar cell array supplies power to the load equipment and the second storage battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711434541.5A CN108258720B (en) | 2017-12-26 | 2017-12-26 | Double-bus energy grid-connected topological structure and grid-connected control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711434541.5A CN108258720B (en) | 2017-12-26 | 2017-12-26 | Double-bus energy grid-connected topological structure and grid-connected control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108258720A CN108258720A (en) | 2018-07-06 |
| CN108258720B true CN108258720B (en) | 2020-04-10 |
Family
ID=62724049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711434541.5A Active CN108258720B (en) | 2017-12-26 | 2017-12-26 | Double-bus energy grid-connected topological structure and grid-connected control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108258720B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586391B (en) * | 2018-10-26 | 2021-11-09 | 中国电子科技集团公司第十八研究所 | Deep space exploration aircraft power supply system |
| NL2023114B1 (en) * | 2019-05-13 | 2020-12-01 | Atlas Technologies Holding Bv | Electric or hybrid means of transport with a solar panel. |
| CN110854984B (en) * | 2019-10-11 | 2021-04-13 | 大气候物联网科技(广州)有限公司 | Double-solar-panel double-lithium battery charging management system and implementation method thereof |
| CN110994768B (en) * | 2019-11-25 | 2021-08-10 | 上海空间电源研究所 | Multi-storage-battery-pack switching and backup device on spacecraft and control method |
| CN111361765B (en) * | 2020-03-19 | 2022-06-14 | 上海卫星工程研究所 | Spacecraft power supply double-bus system |
| CN111525545B (en) * | 2020-04-20 | 2021-04-02 | 北京空间飞行器总体设计部 | Two-cabin grid-connected power supply system and method |
| CN111416335B (en) * | 2020-04-30 | 2021-04-06 | 上海空间电源研究所 | Double-bus solar cell array output power control system |
| CN111786473B (en) * | 2020-05-22 | 2021-12-07 | 中国空间技术研究院 | Ultrahigh-voltage multi-network hybrid bus power transmission system suitable for space power station |
| CN112242698B (en) * | 2020-09-25 | 2022-12-09 | 北京空间飞行器总体设计部 | Hundred kilowatt-level spacecraft full-regulation power supply system |
| CN112636444B (en) * | 2020-12-07 | 2022-06-03 | 上海卫星工程研究所 | Double-star combined spacecraft grid-connected power supply and distribution system with fully-regulated unified bus |
| CN113765206A (en) * | 2021-08-02 | 2021-12-07 | 华信咨询设计研究院有限公司 | Refined standby power control method, device and system for base station |
| CN115117993B (en) * | 2022-08-30 | 2023-06-09 | 长沙天仪空间科技研究院有限公司 | Satellite power supply system based on super capacitor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410936A (en) * | 2016-08-31 | 2017-02-15 | 航天东方红卫星有限公司 | High-power high-efficiency satellite power supply system based on high voltage and low voltage double buses |
| CN106428637B (en) * | 2016-10-14 | 2019-03-26 | 深圳航天科技创新研究院 | A kind of full electric propulsion power system |
-
2017
- 2017-12-26 CN CN201711434541.5A patent/CN108258720B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410936A (en) * | 2016-08-31 | 2017-02-15 | 航天东方红卫星有限公司 | High-power high-efficiency satellite power supply system based on high voltage and low voltage double buses |
| CN106428637B (en) * | 2016-10-14 | 2019-03-26 | 深圳航天科技创新研究院 | A kind of full electric propulsion power system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108258720A (en) | 2018-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108258720B (en) | Double-bus energy grid-connected topological structure and grid-connected control method thereof | |
| CN106059040B (en) | A kind of power-supply system and the energy for cube star is classified regulation and control method | |
| KR101074785B1 (en) | A battery management system and control method thereof, and energy storage system including the battery management system | |
| US7994657B2 (en) | Modular system for unattended energy generation and storage | |
| US8552590B2 (en) | Energy management system and grid-connected energy storage system including the energy management system | |
| US8269374B2 (en) | Solar panel power management system and method | |
| US20240097481A1 (en) | Hybrid battery system | |
| US20090251100A1 (en) | Stackable battery module | |
| CN102630361A (en) | Power conversion apparatus, power generating system, and charge/discharge control method | |
| US20170179723A1 (en) | Clustered energy-storing micro-grid system | |
| US20060099463A1 (en) | Direct current/direct current converter for a fuel cell system | |
| CN102545291A (en) | Solar power storage system and solar power supply system | |
| JP7168438B2 (en) | Power supply system and power supply method | |
| CN103166325A (en) | Energy storage system and controlling method of the same | |
| CN102324583A (en) | Lithium ion storage battery charging method based on sequential shunt switching regulation (S3R) | |
| US9257859B2 (en) | Dynamic battery control based on demand | |
| CN106451752B (en) | Battery voltage equalizing circuit suitable for UPS | |
| US11689117B2 (en) | Power system with an add-on power module | |
| US20220396167A1 (en) | Electric vehicle solar charging system | |
| JP6722295B2 (en) | Power conversion system, power supply system, and power conversion device | |
| Nakamura et al. | Bi-directional multiport converter for utilizing green base stations as virtual power plant | |
| Cavallaro et al. | Smart photovoltaic UPS system for domestic appliances | |
| JP6923121B2 (en) | Power supply device | |
| US20230076547A1 (en) | Solar tracker power management | |
| CN210898560U (en) | Intelligent battery system with parallel mains supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |