CN112838583A - Static generator power supply system and control method thereof - Google Patents
Static generator power supply system and control method thereof Download PDFInfo
- Publication number
- CN112838583A CN112838583A CN202011629757.9A CN202011629757A CN112838583A CN 112838583 A CN112838583 A CN 112838583A CN 202011629757 A CN202011629757 A CN 202011629757A CN 112838583 A CN112838583 A CN 112838583A
- Authority
- CN
- China
- Prior art keywords
- power
- power grid
- load
- converter
- direct current
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000003068 static effect Effects 0.000 title claims abstract description 20
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 45
- 238000010248 power generation Methods 0.000 claims abstract description 37
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 62
- 229910052710 silicon Inorganic materials 0.000 claims description 62
- 239000010703 silicon Substances 0.000 claims description 62
- 238000004891 communication Methods 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 101100365087 Arabidopsis thaliana SCRA gene Proteins 0.000 description 15
- 101000668165 Homo sapiens RNA-binding motif, single-stranded-interacting protein 1 Proteins 0.000 description 15
- 102100039692 RNA-binding motif, single-stranded-interacting protein 1 Human genes 0.000 description 15
- 101150105073 SCR1 gene Proteins 0.000 description 15
- 101100134054 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) NTG1 gene Proteins 0.000 description 15
- 238000010586 diagram Methods 0.000 description 12
- 238000004590 computer program Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- 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
- H02J3/0075—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 according to economic or energy efficiency considerations, e.g. economic dispatch
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
Abstract
The invention relates to a static generator power supply system and a control method thereof, wherein the system comprises: the system comprises a new energy power generation unit, a DC/DC converter, a battery unit, a bidirectional DC/AC converter and a power grid controller; the new energy power generation unit is used for providing a first direct current; the DC/DC converter is used for boosting the first direct current provided by the new energy power generation unit to obtain a second direct current; a bidirectional DC/AC converter for converting the second direct current into a first alternating current and supplying the first alternating current to a grid or an alternating current load through a grid controller; or converting the second alternating current provided by the power grid into fourth direct current through the power grid controller and providing the fourth direct current to the battery unit; and a battery unit for performing charge and discharge. The technical scheme provided by the application not only realizes uninterrupted power supply for the load, but also can help the power grid to supply power to the load when the power grid cannot independently meet the requirement of large-load power utilization, so as to achieve dynamic capacity increase of the system.
Description
Technical Field
The invention belongs to the technical field of new energy power generation, and particularly relates to a static generator power supply system and a control method thereof.
Background
Energy storage is one of means for solving the challenge of energy transformation, and the development is rapid in recent years; the uncertainty of the large-scale access of the high-proportion intermittent renewable energy to the power supply of the power grid is further increased, and the operation of a power system is greatly influenced; today the country encourages power side, grid side and user side energy storage applications.
At present, wind energy and light energy are mainly converted and utilized through an energy storage system, the system technology is mature, but how to realize uninterrupted switching between different power supply forms on the premise of supplying power to a load is still an aspect worth improving at the present stage.
Disclosure of Invention
In view of the above, the present invention provides a static generator power supply system and a control method thereof to solve the problem that the load cannot be supplied with power uninterruptedly when the power grid is powered off in the prior art.
According to a first aspect of embodiments of the present application, there is provided a static generator power supply system, the system comprising: the system comprises a new energy power generation unit, a DC/DC converter, a battery unit, a bidirectional DC/AC converter and a power grid controller;
the new energy power generation unit is used for providing a first direct current;
the DC/DC converter is used for boosting the first direct current provided by the new energy power generation unit to obtain a second direct current;
the bidirectional DC/AC converter is used for converting the second direct current into first alternating current and providing the first alternating current to a power grid or an alternating current load through a power grid controller; or converting the second alternating current provided by the power grid into fourth direct current through the power grid controller and providing the fourth direct current to the battery unit;
the battery unit is used for charging and discharging.
Furthermore, the low-voltage end of the DC/DC converter is connected with a new energy power generation unit, and the high-voltage end of the DC/DC converter is respectively connected with the direct-current side of the bidirectional DC/AC converter and the battery unit;
the direct current side of the bidirectional DC/AC converter is connected with the battery unit, and the alternating current side of the bidirectional DC/AC converter is respectively connected with a power grid and a load through the power grid controller.
Further, the battery unit is specifically configured to charge with the second direct current or the fourth direct current, and to supply power to a load.
Further, the grid controller comprises: the power supply comprises a first silicon controlled rectifier, a second silicon controlled rectifier arranged in a bidirectional DC/AC converter and a relay arranged in the bidirectional DC/AC converter; the second controllable silicon is connected with the relay in parallel;
the first silicon controlled rectifier is arranged between a power grid and a load;
and one end of the second silicon controlled rectifier and one end of the relay which are connected in parallel are connected with the DC/AC converter, and the other end of the second silicon controlled rectifier and the other end of the relay are connected to a connection point between the first silicon controlled rectifier and the load.
Further, the grid controller is configured to:
when the power grid supplies power to the load, the first silicon controlled rectifier is switched on, and the second silicon controlled rectifier and the relay are both switched off;
when the power grid is cut off and the load is not supplied with power, the first silicon controlled rectifier is disconnected, and the second silicon controlled rectifier and the relay are both connected.
Further, the DC/DC converter includes: the device comprises a controller, a maximum power tracking module and a boosting module;
the boosting module is used for filtering the first direct current provided by the new energy power generation unit and boosting the filtered first direct current to obtain a second direct current;
the maximum power tracking module is used for acquiring the maximum power value of the power grid by utilizing a maximum power point tracking technology;
and the controller is used for controlling the boosting module according to the highest power value of the power grid to enable the boosted power of the second direct current to be the highest power value of the power grid.
Further, the bidirectional DC/AC converter includes: the CAN communication module and the bidirectional converter module;
the CAN communication module is used for detecting the power supply condition of a power grid;
the bidirectional conversion module is used for converting second alternating current provided by the power grid into fourth direct current and providing the fourth direct current to the battery unit when the power grid supplies power to a load; and when the power grid is cut off and the load is not supplied with power, converting the second direct current into first alternating current and supplying the first alternating current to the power grid or the alternating current load.
According to a second aspect of embodiments of the present application, there is provided a method of controlling a static generator power supply system, the method comprising:
detecting the power supply condition of a power grid;
and judging whether the new energy power generation unit or the battery unit is used for supplying power to the load according to the power supply condition of the power grid so as to ensure that the load is supplied with power uninterruptedly.
Further, the detecting the power supply condition of the power grid includes:
and detecting whether the power grid supplies power for the load or not by utilizing a CAN communication module in the DC/AC converter.
Further, the power supply condition according to the electric wire netting utilizes new forms of energy power generation unit or battery cell to supply power for the load, includes:
when the power grid supplies power to the load, the first silicon controlled rectifier is switched on, and the second silicon controlled rectifier and the relay are both switched off;
when the power grid is powered off and does not supply power to the load, the second silicon controlled rectifier is conducted, the maximum power tracking module obtains the highest power value of the power grid before the power grid is powered off by using the maximum power point tracking technology and sends the highest power value to the controller, the controller controls the boosting module according to the highest power value of the power grid before the power grid is powered off to enable the output power of the boosted new energy power generation unit to be the highest power value of the power grid before the power grid is powered off, the first silicon controlled rectifier is disconnected after the second silicon controlled rectifier is conducted for a first time period;
when the power grid is powered off and does not supply power to the load again, the first controlled silicon is conducted for a third time period, the electric appliance is disconnected, the first controlled silicon is conducted for a fourth time period, the second controlled silicon is disconnected,
wherein the first time period is less than the second time period and the third time period is less than the fourth time period.
By adopting the technical scheme, the invention can achieve the following beneficial effects: the static generator power supply system is constructed by the new energy power generation unit, the DC/DC converter, the battery unit, the bidirectional DC/AC converter and the power grid controller, so that uninterrupted power supply for a load is realized, and the power grid can be helped to supply power to the load when the power grid cannot independently meet the power consumption of a large load, so that the dynamic capacity increase of the system is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic block diagram of a static generator power supply system according to an exemplary embodiment;
FIG. 2 is a schematic diagram illustrating a grid controller in a static generator power supply system in accordance with an exemplary embodiment;
FIG. 3 is a flow chart illustrating a method of controlling a static generator power supply system in accordance with an exemplary embodiment;
FIG. 4 illustrates a timing diagram of the operation of a static generator power supply system, according to an exemplary embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a schematic diagram illustrating a static generator power supply system according to an exemplary embodiment, the system including, as shown in fig. 1: the system comprises a new energy power generation unit, a DC/DC converter, a battery unit, a bidirectional DC/AC converter and a power grid controller;
the new energy power generation unit is used for providing a first direct current;
the DC/DC converter is used for boosting the first direct current provided by the new energy power generation unit to obtain a second direct current;
a bidirectional DC/AC converter for converting the second direct current into a first alternating current and supplying the first alternating current to a grid or an alternating current load through a grid controller; or converting the second alternating current provided by the power grid into fourth direct current through the power grid controller and providing the fourth direct current to the battery unit;
and a battery unit for performing charge and discharge.
It should be noted that the new energy power generation unit may be implemented by, but not limited to, a photovoltaic panel; in some alternative embodiments, the new energy power generation unit may also generate power by wind energy. The implementation of the new energy power generation unit may be selected by a person skilled in the art according to engineering needs.
Further optionally, a low-voltage end of the DC/DC converter is connected to the new energy power generation unit, and a high-voltage end of the DC/DC converter is connected to a direct-current side of the bidirectional DC/AC converter and the battery unit, respectively;
the direct current side of the bidirectional DC/AC converter is connected with the battery unit, and the alternating current side of the bidirectional DC/AC converter is respectively connected with the power grid and the load through the power grid controller.
Further optionally, the battery unit is specifically configured to charge with the second direct current or the fourth direct current, and to supply power to the load.
In some alternative embodiments, the grid is powered by a battery unit.
It should be noted that the battery unit may be, but is not limited to, implemented by a lithium battery.
Further optionally, as shown in fig. 2, the grid controller includes: the power supply comprises a first silicon controlled rectifier SCR1, a second silicon controlled rectifier SCR2 arranged in a bidirectional DC/AC converter and a relay KM arranged in the bidirectional DC/AC converter; the second silicon controlled rectifier SCR2 is connected with the relay KM in parallel;
the first silicon controlled SCR1 is disposed between the grid and the load;
one end of the second SCR2 and the relay KM which are connected in parallel is connected with the DC/AC converter, and the other end is connected with a connection point between the first SCR1 and the load.
Further optionally, the grid controller is configured to:
when the power grid supplies power to the load, the first silicon controlled rectifier SCR1 is switched on, and the second silicon controlled rectifier SCR2 and the relay KM are both switched off;
when the power grid is cut off and the load is not supplied with power, the first silicon controlled rectifier SCR1 is disconnected, and the second silicon controlled rectifier SCR2 and the relay KM are both connected.
It will be appreciated that the main components for achieving uninterrupted switching of the static generator are the bidirectional DC/AC converter and the grid controller, wherein the relay and the second thyristor inside the bidirectional DC/AC converter, and the first thyristor inside the static switch, play the main switching role.
Further optionally, the DC/DC converter comprises: the device comprises a controller, a maximum power tracking module and a boosting module;
the boost module is used for filtering the first direct current provided by the new energy power generation unit and boosting the filtered first direct current to obtain a second direct current;
the maximum power tracking module is used for acquiring the maximum power value of the power grid by utilizing a maximum power point tracking technology;
and the controller is used for controlling the boosting module according to the highest power value of the power grid to enable the boosted power of the second direct current to be the highest power value of the power grid.
It should be noted that the "MPPT" mode, which is the maximum power point tracking technology, in the embodiment of the present invention is well known to those skilled in the art, and therefore, the specific implementation manner thereof is not described too much.
Further optionally, the bidirectional DC/AC converter comprises: the CAN communication module and the bidirectional converter module;
the CAN communication module is used for detecting the power supply condition of a power grid;
the bidirectional conversion module is used for converting second alternating current provided by the power grid into fourth direct current and providing the fourth direct current to the battery unit when the power grid supplies power to a load; when the power grid is cut off and the load is not supplied with power, the second direct current is converted into the first alternating current and is supplied to the power grid or the alternating current load.
It should be noted that the "CAN communication module" mode referred to in the embodiments of the present invention is well known to those skilled in the art, and therefore, the specific implementation thereof is not described too much.
According to the power supply system through the static generator, provided by the embodiment of the invention, a new energy power generation unit provides a first direct current, a DC/DC converter boosts the first direct current provided by the new energy power generation unit to obtain a second direct current, a bidirectional DC/AC converter converts the second direct current into the first alternating current, and provides the first alternating current for a power grid or an alternating current load through a power grid controller or converts the second alternating current provided by the power grid into a fourth direct current through the power grid controller to provide the fourth direct current for a battery unit, and the battery unit charges and supplies power for a load by using the second direct current or the fourth direct current, so that uninterrupted power supply for the load is realized, and the power grid can be helped to supply power for the load when the power grid cannot independently meet the requirement of large-load capacity power utilization, so; the battery unit can be charged in a peak clipping and valley filling mode, namely, the battery unit is charged by commercial power when the electricity price is low, the battery unit is charged by a load when the electricity price is high, and redundant electricity can be sold to a power grid; the self-generation off-grid power generation system can independently operate without commercial power, and is also suitable for remote areas of power transmission and distribution.
The embodiment of the present invention further provides a control method for a static generator power supply system, as shown in fig. 3, the method may be used in a terminal, but is not limited to, and includes the following steps:
step 101: detecting the power supply condition of a power grid;
step 102: and judging whether the new energy power generation unit or the battery unit is used for supplying power to the load according to the power supply condition of the power grid so as to ensure that the load is supplied with power uninterruptedly.
Further optionally, step 101 includes:
and detecting whether the power grid supplies power for the load or not by utilizing a CAN communication module in the DC/AC converter.
It should be noted that the "CAN communication module" mode referred to in the embodiments of the present invention is well known to those skilled in the art, and therefore, the specific implementation thereof is not described too much.
Further optionally, step 102 includes:
step 1021: when the power grid supplies power to the load, the first silicon controlled rectifier SCR1 is switched on, and the second silicon controlled rectifier SCR2 and the relay KM are both switched off;
it is understood that the above-mentioned situation is the situation when the grid is continuously supplying power to the load;
step 1022: when the power grid is powered off and does not supply power to the load, the second silicon controlled rectifier SCR2 is conducted, the maximum power tracking module obtains the highest power value before the power grid is powered off by using the maximum power point tracking technology and sends the highest power value to the controller, the controller controls the boosting module according to the highest power value before the power grid is powered off to enable the output power of the boosted new energy power generation unit to be the highest power value before the power grid is powered off, the second silicon controlled rectifier SCR2 is conducted for a first time period, then the first silicon controlled rectifier SCR1 is disconnected, and the second silicon controlled rectifier SCR2 is conducted for a second;
it is understood that the above case is a case where the power grid is powered off again when the power grid continues to supply power to the load;
step 1023: when the power grid is cut off and the load is not supplied with power, the first silicon controlled rectifier SCR1 is conducted, the electric appliance KM is disconnected after the first silicon controlled rectifier SCR1 is conducted for a third time period, the second silicon controlled rectifier SCR2 is disconnected after the first silicon controlled rectifier SCR1 is conducted for a fourth time period,
it can be understood that the above case is the case when the load is powered again after the power grid is powered off and the load is not powered, and the case when the power grid continuously powers the load is the case of the above step 1022;
wherein the first time period is less than the second time period and the third time period is less than the fourth time period.
It should be noted that, in the embodiment of the present invention, the sizes of the first time period, the second time period, the third time period, and the fourth time period are not limited, and may be selected by a person skilled in the art according to engineering requirements or experimental data.
For example, as shown in fig. 4, at time 0 to T1, the grid is in a grid direct supply state, the grid directly supplies power to the load, at this time, the first thyristor SCR1 of the grid controller is in a conducting state, the voltage Uc and the current Ic on the load side are the voltage Ua and Ia on the output side of the grid controller, the grid controller sends a power frequency synchronization signal, the second thyristor SCR2 and the relay KM in the bidirectional DC/AC converter are in a disconnecting state, the bidirectional DC/AC converter receives the power frequency synchronization signal of the grid controller, receives the amplitude and phase information of the grid, at this time, the bidirectional DC/AC converter is equivalent to a current source, and the voltage Ub and the current Ib on the bidirectional DC/AC converter side are both 0;
at the time of T1, a second silicon controlled rectifier SCR2 in the bidirectional DC/AC converter is conducted, the bidirectional DC/AC converter learns the power failure of commercial power through CAN communication at the time, the maximum power tracking module obtains the highest power value of the power grid before the time of T1 by using the maximum power point tracking technology and sends the highest power value to the controller, the controller controls the boosting module according to the highest power value of the power grid before the time of T1 to enable the output power of the boosted new energy power generation unit to be the highest power value of the power grid at the time of T1, the bidirectional DC/AC converter is converted into a voltage source by a current source to output to provide energy for a load, and a relay KM lags behind the conduction of, at the time of T2, the first silicon controlled rectifier SCR1 is disconnected, the voltages Ua and Ia at the output side of the grid controller are 0, and the first silicon controlled rectifier SCR1 and the second silicon controlled rectifier SCR2 have common time, so that the system can be switched uninterruptedly;
the bidirectional DC/AC converter supplies power to a load at the time of T2-T4, the bidirectional DC/AC converter detects the access of commercial power at the time of T4, switching information is sent to the grid controller through CAN communication, the grid controller closes the first silicon controlled rectifier SCR1 at the time of T4, then the relay KM in the bidirectional DC/AC converter is opened at the time of T5, and the second silicon controlled rectifier SCR2 is opened at the time of T6.
It should be noted that, under certain conditions, in the switching process, the first SCR1 needs to be turned off first, and then the second SCR2 to be switched is turned on, for example, the grid controller is over-protected, and the voltage acquired by the grid controller exceeds the range of the second SCR, which is referred to as intermittent switching, that is, the two SCRs are both turned off for a period of time in the switching process, and the system needs to be turned on after the system meets the conditions.
According to the control method of the power supply system through the static generator, whether the new energy power generation unit or the battery unit is used for supplying power to the load is judged according to the power supply condition of the power grid, so that the load is guaranteed to be supplied with power uninterruptedly, uninterrupted power supply to the load is realized, the power grid can be helped to supply power to the load when the power grid cannot independently meet the requirement of large-load power utilization, and dynamic capacity increase of the system is achieved; the battery unit can be charged in a peak clipping and valley filling mode, namely, the battery unit is charged by commercial power when the electricity price is low, the battery unit is charged by a load when the electricity price is high, and redundant electricity can be sold to a power grid; the self-generation off-grid power generation system can independently operate without commercial power, and is also suitable for remote areas of power transmission and distribution.
It is understood that the method embodiments provided above correspond to the system embodiments described above, and the corresponding specific contents may be referred to each other, which is not described herein again.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A static generator power supply system, the system comprising: the system comprises a new energy power generation unit, a DC/DC converter, a battery unit, a bidirectional DC/AC converter and a power grid controller;
the new energy power generation unit is used for providing a first direct current;
the DC/DC converter is used for boosting the first direct current provided by the new energy power generation unit to obtain a second direct current;
the bidirectional DC/AC converter is used for converting the second direct current into first alternating current and providing the first alternating current to a power grid or an alternating current load through a power grid controller; or converting the second alternating current provided by the power grid into fourth direct current through the power grid controller and providing the fourth direct current to the battery unit;
the battery unit is used for charging and discharging.
2. The system of claim 1, wherein the low voltage side of the DC/DC converter is connected to a new energy power generation unit, and the high voltage side of the DC/DC converter is connected to the DC side of the bidirectional DC/AC converter and the battery unit, respectively;
the direct current side of the bidirectional DC/AC converter is connected with the battery unit, and the alternating current side of the bidirectional DC/AC converter is respectively connected with a power grid and a load through the power grid controller.
3. The system according to claim 1, characterized in that the battery unit is particularly adapted to be charged with the second direct current or the fourth direct current and to supply a load.
4. The system of claim 1, wherein the grid controller comprises: the power supply comprises a first silicon controlled rectifier, a second silicon controlled rectifier arranged in a bidirectional DC/AC converter and a relay arranged in the bidirectional DC/AC converter; the second controllable silicon is connected with the relay in parallel;
the first silicon controlled rectifier is arranged between a power grid and a load;
and one end of the second silicon controlled rectifier and one end of the relay which are connected in parallel are connected with the DC/AC converter, and the other end of the second silicon controlled rectifier and the other end of the relay are connected to a connection point between the first silicon controlled rectifier and the load.
5. The system of claim 4, wherein the grid controller is configured to:
when the power grid supplies power to the load, the first silicon controlled rectifier is switched on, and the second silicon controlled rectifier and the relay are both switched off;
when the power grid is cut off and the load is not supplied with power, the first silicon controlled rectifier is disconnected, and the second silicon controlled rectifier and the relay are both connected.
6. The system of claim 1, wherein the DC/DC converter comprises: the device comprises a controller, a maximum power tracking module and a boosting module;
the boosting module is used for filtering the first direct current provided by the new energy power generation unit and boosting the filtered first direct current to obtain a second direct current;
the maximum power tracking module is used for acquiring the maximum power value of the power grid by utilizing a maximum power point tracking technology;
and the controller is used for controlling the boosting module according to the highest power value of the power grid to enable the boosted power of the second direct current to be the highest power value of the power grid.
7. The system of claim 1, wherein the bi-directional DC/AC converter comprises: the CAN communication module and the bidirectional converter module;
the CAN communication module is used for detecting the power supply condition of a power grid;
the bidirectional conversion module is used for converting second alternating current provided by the power grid into fourth direct current and providing the fourth direct current to the battery unit when the power grid supplies power to a load; and when the power grid is cut off and the load is not supplied with power, converting the second direct current into first alternating current and supplying the first alternating current to the power grid or the alternating current load.
8. A method of controlling a static generator power supply system according to any of claims 1 to 7, characterised in that the method comprises:
detecting the power supply condition of a power grid;
and judging whether the new energy power generation unit or the battery unit is used for supplying power to the load according to the power supply condition of the power grid so as to ensure that the load is supplied with power uninterruptedly.
9. The method of claim 8, wherein the detecting the power condition of the power grid comprises:
and detecting whether the power grid supplies power for the load or not by utilizing a CAN communication module in the DC/AC converter.
10. The method according to claim 9, wherein the power supply of the load by using the new energy power generation unit or the battery unit according to the power supply condition of the power grid comprises:
when the power grid supplies power to the load, the first silicon controlled rectifier is switched on, and the second silicon controlled rectifier and the relay are both switched off;
when the power grid is powered off and does not supply power to the load, the second silicon controlled rectifier is conducted, the maximum power tracking module obtains the highest power value of the power grid before the power grid is powered off by using the maximum power point tracking technology and sends the highest power value to the controller, the controller controls the boosting module according to the highest power value of the power grid before the power grid is powered off to enable the output power of the boosted new energy power generation unit to be the highest power value of the power grid before the power grid is powered off, the first silicon controlled rectifier is disconnected after the second silicon controlled rectifier is conducted for a first time period;
when the power grid is powered off and does not supply power to the load again, the first controlled silicon is conducted for a third time period, the electric appliance is disconnected, the first controlled silicon is conducted for a fourth time period, the second controlled silicon is disconnected,
wherein the first time period is less than the second time period and the third time period is less than the fourth time period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011629757.9A CN112838583A (en) | 2020-12-31 | 2020-12-31 | Static generator power supply system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011629757.9A CN112838583A (en) | 2020-12-31 | 2020-12-31 | Static generator power supply system and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112838583A true CN112838583A (en) | 2021-05-25 |
Family
ID=75924825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011629757.9A Pending CN112838583A (en) | 2020-12-31 | 2020-12-31 | Static generator power supply system and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112838583A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116667518A (en) * | 2023-07-24 | 2023-08-29 | 山东华天电气有限公司 | Direct-current voltage sag management circuit and control method thereof |
-
2020
- 2020-12-31 CN CN202011629757.9A patent/CN112838583A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116667518A (en) * | 2023-07-24 | 2023-08-29 | 山东华天电气有限公司 | Direct-current voltage sag management circuit and control method thereof |
| CN116667518B (en) * | 2023-07-24 | 2023-10-27 | 山东华天电气有限公司 | Direct-current voltage sag management circuit and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101826741B (en) | Novel efficient solar cell charging system and control method | |
| JP5290349B2 (en) | DC power supply system and control method thereof | |
| JP2012228028A (en) | Power converter, dc power feeding system, and control method of the same | |
| CN103972976A (en) | Electric energy supply system | |
| CN103733465A (en) | Charging device | |
| CN203674793U (en) | On-line power frequency uninterrupted power supply | |
| US20130057196A1 (en) | Photovoltaic powered system with adaptive power control and method of operating the same | |
| CN103066677A (en) | Self-adaptive hybrid power supply system | |
| CN106786755A (en) | A kind of energy-storage system and control method | |
| CN110970928A (en) | Energy storage off-grid inverter with photovoltaic and commercial power simultaneously complementarily powered and control method | |
| CN114204901A (en) | Photovoltaic system, inverter and bus voltage control method of inverter | |
| Dhara et al. | A Novel Voltage-Zone based power management scheme for PV-Battery based Standalone System | |
| CN112838583A (en) | Static generator power supply system and control method thereof | |
| CN203859575U (en) | Reverse control integrated machine of hybrid power photovoltaic energy-storage system | |
| KR20130051772A (en) | Power applying apparatus and method for controlling connecting photovoltaic power generating apparatus | |
| CN112421659A (en) | Energy storage dilatation power | |
| CN104767468A (en) | Solar server control system and method | |
| CN103368249A (en) | System and method for uninterrupted power supply | |
| CN108599255A (en) | A kind of micro-grid coordination control method considering electric-gas interconnection | |
| CN105762913A (en) | Micro grid system | |
| CN212380953U (en) | Intelligent photovoltaic grid-connected and off-grid integrated energy storage inverter | |
| CN114336577A (en) | Optical storage power supply system and method and optical storage direct current electric appliance integrated system | |
| Gawande et al. | Design and development of cost-effective solar PV based DC microgrid for rural applications | |
| CN202651815U (en) | Multiple-backup solar power supply system | |
| CN111313528A (en) | Multifunctional power supply system and power supply equipment |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210525 |
|
| WD01 | Invention patent application deemed withdrawn after publication |