CN113328512A - Power supply system - Google Patents
Power supply system Download PDFInfo
- Publication number
- CN113328512A CN113328512A CN202110565000.6A CN202110565000A CN113328512A CN 113328512 A CN113328512 A CN 113328512A CN 202110565000 A CN202110565000 A CN 202110565000A CN 113328512 A CN113328512 A CN 113328512A
- Authority
- CN
- China
- Prior art keywords
- power supply
- load
- energy
- generator
- battery pack
- 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
- 238000004146 energy storage Methods 0.000 claims abstract description 105
- 239000003990 capacitor Substances 0.000 claims description 25
- 238000010248 power generation Methods 0.000 claims description 21
- 230000002457 bidirectional effect Effects 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 12
- 230000001131 transforming effect Effects 0.000 claims description 6
- 238000003491 array Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000011161 development Methods 0.000 description 4
- 239000003502 gasoline Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004590 computer program Methods 0.000 description 3
- 239000002283 diesel fuel Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient effect 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
- 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
- H02J9/061—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 DC powered loads
-
- 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
- H02J9/08—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 requiring starting of a prime-mover
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present application relates to a power supply system. The power supply system includes: the system comprises a mains supply circuit, a generator power supply circuit, an energy storage power supply circuit and a controller; the mains supply loop, the generator power supply loop and the energy storage power supply loop are all connected with the controller; and the controller is used for controlling the energy storage power supply circuit and/or the generator power supply circuit to supply power to the load when the commercial power supply circuit fails. Equivalently, the energy storage power supply loop is added in the power supply system to serve as a guarantee that the load is uninterruptedly supplied with power, and when the mains supply fault is detected, the controller can be switched to the energy storage power supply loop to supply power to the load; or, the power supply is switched to the energy storage power supply loop and the generator power supply loop to supply power to the load; or switching to the generator power supply loop to supply power to the load. That is, this application is through the switching between the many power supply return circuits, for the load lasts the power supply, has improved the power supply reliability of power supply system.
Description
Technical Field
The present application relates to the field of power supply technologies, and in particular, to a power supply system.
Background
In a direct current power supply system, commercial power is converted into adjustable direct current through a power supply converter and then supplies power to a load. For uninterrupted power supply, the dc power supply system includes a storage battery, a generator set, and an Automatic Transfer Switching (ATS) controller. When the mains supply is normal, the mains supply supplies power to the load and charges the storage battery pack; when the commercial power is in failure, the storage battery pack supplies power to the load, and when the electric energy stored in the storage battery pack is too low, the generator set is started. The power frequency alternating current output by the generator set is switched by the ATS to supply power for the power converter, and the power converter continues to supply power for the load.
However, if the commercial power is frequently failed, the generator set is frequently started and stopped, which shortens the service life of the generator set, and leads to poor power supply reliability of the dc power supply system.
Disclosure of Invention
In view of the above, it is necessary to provide a power supply system capable of improving power supply reliability in view of the above-described technical problems.
A power supply system, comprising: the system comprises a mains supply circuit, a generator power supply circuit, an energy storage power supply circuit and a controller; the mains supply loop, the generator power supply loop and the energy storage power supply loop are all connected with the controller;
and the controller is used for controlling the energy storage power supply loop and/or the generator power supply loop to supply power to the load when the commercial power supply loop has a fault.
In one embodiment, the power supply system further comprises a battery pack; the mains supply loop, the generator power supply loop and the energy storage power supply loop are all connected with the input end of the storage battery pack; the output end of the storage battery pack is connected with a load;
the mains supply loop, the generator power supply loop and the energy storage power supply loop are all used for charging the storage battery pack;
and the storage battery pack is used for supplying power to the load during the switching period of the mains supply circuit, the generator power supply circuit and the energy storage power supply circuit.
In one embodiment, the power supply system further comprises a voltage collector; the voltage collector is arranged at the output end of the storage battery pack;
the voltage collector is used for collecting the output voltage of the storage battery pack;
and the controller is also used for controlling the switching among the commercial power supply loop, the generator power supply loop and the energy storage power supply loop according to the output voltage acquired by the voltage acquisition device.
In one embodiment, the tank power supply circuit includes: an energy source device and an energy storage device; the output end of the energy device is connected with the input end of the energy storage device, and the output end of the energy storage device is respectively connected with the input end of the power supply loop of the generator, the controller, the load and the storage battery pack;
the energy device is used for converting the acquired energy into electric energy and inputting the converted electric energy into the energy storage device for storage;
and the energy storage device is used for respectively supplying power to the input end of the power supply loop of the generator, the controller, the load and the storage battery pack according to the converted electric energy.
In one embodiment, the energy source device comprises: wind generators and photovoltaic power generation arrays; the wind driven generator and the photovoltaic power generation array are respectively connected with the input end of the energy storage device;
the wind driven generator is used for converting wind energy into electric energy and inputting the converted electric energy into the energy storage device for storage; and the photovoltaic power generation array is used for converting light energy into electric energy and inputting the converted electric energy into the energy storage device for storage.
In one embodiment, the energy storage device comprises: the device comprises a capacitor, a battery assembly and a connection control assembly; the input end of the capacitor is connected with the output end of the energy device, the output end of the capacitor is connected with the input end of the battery assembly, and the output end of the battery assembly is connected with the input end of the power supply loop of the generator, the controller and the storage battery pack through the connection control assembly;
and the battery assembly is used for storing the electric energy converted by the energy source device through the capacitor.
In one embodiment, the mains supply circuit comprises: the first AC-DC rectifying circuit and the first voltage converter; the input end of the first alternating current-direct current rectifying circuit is connected with commercial power, the output end of the first alternating current-direct current rectifying circuit is connected with the input end of the first voltage converter, and the output end of the first voltage converter is respectively connected with a load and a storage battery pack;
the first alternating current-direct current rectifying circuit is used for rectifying alternating current voltage transmitted by commercial power into direct current voltage;
the first voltage converter is used for transforming the direct-current voltage according to the power supply requirement of the load, supplying power to the load by using the transformed voltage and charging the storage battery pack.
In one embodiment, the generator power supply circuit comprises: the generator set, a second alternating current-direct current rectification circuit and a second voltage converter; the input end of the second alternating current-direct current rectifying circuit is connected with the output end of the generator set, the output end of the second alternating current-direct current rectifying circuit is connected with the input end of the second voltage converter, and the output end of the second voltage converter is respectively connected with the load and the storage battery pack;
the second alternating current-direct current rectifying circuit is used for rectifying alternating current voltage output by the generator set into direct current voltage;
and the second voltage converter is used for transforming the direct-current voltage according to the power supply requirement of the load, supplying power to the load by using the transformed voltage and charging the storage battery pack.
In one embodiment, the power supply system further comprises: the bidirectional converter is connected between the load and the storage battery pack;
and the bidirectional converter is used for carrying out bidirectional transmission on the electric energy between the load and the storage battery pack.
In one embodiment, the bidirectional converter comprises a diode, an inductor, a capacitor and two switching tubes; the two switching tubes are connected in series and then connected in parallel with the capacitor, and the inductor is connected with one end of the two switching tubes connected in series; the two switch tubes are both connected with a diode in parallel.
The present application provides a power supply system, including: the system comprises a mains supply circuit, a generator power supply circuit, an energy storage power supply circuit and a controller; the mains supply loop, the generator power supply loop and the energy storage power supply loop are all connected with the controller; the controller is used for controlling the energy storage power supply loop and/or the generator power supply loop to supply power to the load when the commercial power supply loop has a fault. Equivalently, the energy storage power supply loop is added in the power supply system to serve as a guarantee that the load is uninterruptedly supplied with power, and when the mains supply fault is detected, the controller can be switched to the energy storage power supply loop to supply power to the load; or, the power supply is switched to the energy storage power supply loop and the generator power supply loop to supply power to the load; or switching to the generator power supply loop to supply power to the load. That is, this application is through the switching between the many power supply return circuits, for the load lasts the power supply, has improved the power supply reliability of power supply system.
Drawings
Fig. 1 is a schematic diagram of a power supply system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of another power supply system provided in one embodiment of the present application;
FIG. 3 is a schematic diagram of another power supply system provided by an embodiment of the present application;
FIG. 4 is a schematic diagram of another power supply system provided by an embodiment of the present application;
FIG. 5 is a schematic diagram of another power supply system provided by an embodiment of the present application;
FIG. 6 is a schematic diagram of another power supply system provided in one embodiment of the present application;
FIG. 7 is a schematic diagram of another power supply system provided by an embodiment of the present application;
fig. 8 is a schematic structural diagram of a bidirectional converter according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Before explaining the power supply system provided by the present application in detail, an application scenario of the present application will be explained.
An electric power system is an integral system which is organically coordinated and coordinated by multiple links for producing, transmitting and consuming electric energy, and the electric power system generally comprises: the system comprises a power plant, a transmission network, a distribution network and users, wherein the power plant is used for producing electric energy, the transmission network and the distribution network are jointly called as an electric power network, the transmission network is a transmission line with the voltage of more than 35kv and a substation connected with the transmission network, the distribution network is a transmission line with the voltage of less than 10kv and a distribution substation, and the users comprise various loads, specifically, the loads can be: personal Computers (PCs), mobile phones, smart phones, Personal Digital Assistants (PDAs), wearable devices, pocket PCs, smart phones, smart car machines, smart tvs, smart speakers, etc., to name but a few.
With the development of science and technology, various electronic devices are developed, which have high requirements on the quality of power supplied, are more sensitive to the perception of changes in the quality of power, and may affect the performance of the load or even damage the load when the supply voltage and current of the sensitive load change. Therefore, when the sensitive loads are supplied with power, at least two power supply loops are arranged in the power supply system, and when one power supply loop fails, the other power supply loop can be switched to, so that the power supply of the loads is not interrupted.
In the related art, a power supply system is provided with two power supply loops: the power supply system comprises a mains supply circuit and a generator supply circuit. Under the condition that the mains supply is normal, the mains supply loop supplies power to the load, when the mains supply fault is detected, the generator set is started, the generator power supply loop supplies power to the load, and when the mains supply is recovered to be normal, the generator set stops running and continues to supply power to the load through the mains supply loop.
Wherein, commercial power is power frequency alternating current, and common trouble of commercial power includes but not limited to: surge, high voltage breakthrough, transient over-voltage, voltage sag, noise interference, frequency drift, low voltage, mains interruption, etc.
When the commercial power frequently breaks down, the generator set is frequently started, a large amount of fuel oil is consumed, and the service life of the generator is shortened. And when the commercial power is out of order, the quality of the generator set directly influences the stability of the power supply system, and if the generator set cannot continuously supply power to the load due to the failure, the load is damaged due to the interruption of the power supply.
Based on the above situation, there is a need for a power supply system that can ensure continuous power supply of a load and improve power supply reliability.
With the spread of the problem of energy shortage, the development of renewable energy becomes an effective measure for solving the problem of energy shortage, and meanwhile, the development of renewable energy can also solve the problem of safe and reliable supply of energy. Wind power and solar power are the two most popular renewable energy sources at present. Wind power generation is realized by converting wind energy in nature into mechanical energy of a wind driven generator through a wind driven generator and then converting the mechanical energy into electric energy; the solar power generation is to directly convert solar energy into electric energy through a solar cell, and both the wind power generation and the solar power generation have the advantages of no pollution, low noise, long service life and simple use and maintenance.
Therefore, the energy storage power supply loop is introduced into the power supply system, and the load is supplied with power through the electric energy converted from the renewable resources.
Referring to fig. 1, fig. 1 is a schematic diagram of a power supply system provided in an embodiment of the present application. The power supply system 100 includes: a mains supply circuit 101, a generator supply circuit 102, an energy storage supply circuit 103 and a controller 104; the mains supply circuit 101, the generator supply circuit 102 and the energy storage supply circuit 103 are all connected with the controller 104. The controller 104 is configured to control the energy storage power supply circuit 103 and/or the generator power supply circuit 102 to supply power to the load when the utility power supply circuit 101 fails.
The electric energy output by the power distribution network is transmitted by the commercial power supply loop, the electric energy converted by the generator set through consuming gasoline or diesel oil is transmitted by the generator power supply loop, and the electric energy converted by renewable energy sources in the nature is transmitted by the energy storage power supply loop.
It should be noted that, in one possible case, the controller may be connected to the mains supply circuit, the generator supply circuit and the energy storage supply circuit through wires, respectively, for controlling the switching of the supply circuits of the loads. In another possible case, a conducting switch may be provided on each power supply loop, the controller is in communication connection with the conducting switches of the commercial power supply loop, the generator power supply loop and the energy storage power supply loop, respectively, and when a certain power supply loop is adopted to supply power to the load, the controller triggers the conducting switch of the power supply loop to conduct. The connection method is not limited in the present application, and fig. 1 illustrates a switching control function of a controller for the purpose of explanation, and does not limit the connection method in the present application.
In one possible implementation, the power supply loop for switching the load may be implemented by a switching control function of the controller. During the switching process, the order of supplying power to the load is: the commercial power supply loop supplies power to the load, the energy storage power supply loop supplies power to the load, and the generator power supply loop supplies power to the load.
The energy storage power supply loop adopts renewable energy in nature to convert electric energy, can generate electric energy to supply power for a load under the condition of good natural weather, but cannot output the electric energy under some special conditions. When the power supply loop of the generator supplies power to the load, the generator set needs to be started, and when the power supply loop does not supply power, the generator set needs to be shut down, but the working performance of the generator set is influenced and the service life of the generator set is shortened due to frequent starting and shutting down of the generator set.
Based on the power supply sequence, when the power supply system is used for supplying power to the load, the commercial power supply loop is preferentially adopted for supplying power to the load, the energy storage power supply loop is adopted for supplying power to the load, and the generator power supply loop is finally adopted for supplying power to the load, so that the continuity of load power supply can be ensured to the maximum extent.
Specifically, when the power supply system is used for supplying power to a load, the power supply system comprises the following four possible power supply modes:
(1) when the commercial power is normal, the commercial power supplies power to the load. At the moment, the electric energy generated by the conversion of the renewable energy source in the energy storage power supply loop is stored firstly, and the power supply loop of the generator is not conducted.
(2) When the mains supply fails, in order to avoid the load from being damaged, the power transmission of the mains supply loop is interrupted; and meanwhile, the energy storage power supply loop is switched to supply power to the load.
(3) When the output electric energy cannot meet the power supply requirement of the load due to weather reasons, the power supply loop of the generator is conducted. At the moment, the electric energy of the load is provided by the energy storage power supply circuit and the generator power supply circuit together.
(4) When the energy storage power supply loop cannot output electric energy due to weather reasons, the energy storage power supply loop is switched to the generator power supply loop to supply power to the load.
Furthermore, based on fig. 1, the power supply system may supply power to a plurality of loads, the plurality of loads may be connected to a bus, and the power transmitted by the power supply loop is transmitted to the bus to supply power to the plurality of loads through the bus.
The present application provides a power supply system, including: the system comprises a mains supply circuit, a generator power supply circuit, an energy storage power supply circuit and a controller; the mains supply loop, the generator power supply loop and the energy storage power supply loop are all connected with the controller; the controller is used for controlling the energy storage power supply loop and/or the generator power supply loop to supply power to the load when the commercial power supply loop has a fault. Equivalently, the energy storage power supply loop is added in the power supply system to serve as a guarantee that the load is uninterruptedly supplied with power, and when the mains supply fault is detected, the controller can be switched to the energy storage power supply loop to supply power to the load; or, the power supply is switched to the energy storage power supply loop and the generator power supply loop to supply power to the load; or switching to the generator power supply loop to supply power to the load. That is, this application is through the switching between the many power supply return circuits, for the load lasts the power supply, has improved the power supply reliability of power supply system.
In one embodiment, as shown in fig. 2, the present application provides another power supply system, the power supply system 100 further comprising a battery pack 105; the mains supply circuit 101, the generator power supply circuit 102 and the energy storage power supply circuit 103 are all connected with the input end of the storage battery pack 105, and the output end of the storage battery pack 105 is connected with a load; the mains supply circuit 101, the generator power supply circuit 102 and the energy storage power supply circuit 103 are all used for charging the storage battery pack 105; the battery pack 105 is used for supplying power to the load during switching of the mains supply circuit 101, the generator supply circuit 102 and the energy storage supply circuit 103.
In the power supply system, the conduction of the power supply loop of the generator and the operation of the controller both need to use electric energy, and after the power supply loop of the generator starts to be normally started, the electric energy can be output by consuming gasoline or diesel oil. In order to avoid the situation that the power supply of the load is abnormal due to the switching delay in the switching process, the storage battery pack is added on the basis of the power supply system shown in fig. 1 to serve as a switching power supply guarantee, so that the power supply quality of the load is not affected by the switching of the power supply loop.
When the commercial power is normally supplied, the commercial power supplies power for the load on one hand, and the normal operation of the load is ensured; on the other hand, the commercial power charges the storage battery pack.
When the mains supply fails, the storage battery pack continues to supply power to the load, meanwhile, the controller switches the power supply loop of the load to the energy storage power supply loop, after the load is stably supplied with power, the storage battery pack does not supply power to the load any more, the energy storage power supply loop supplies power to the load, and the storage battery pack is charged.
When the output electric energy of the energy storage power supply loop cannot meet the electric energy requirements of all loads due to natural weather, the storage battery pack continues to supply power to the loads, namely, the electric energy of the loads is provided by the energy storage power supply loop and the storage battery pack together. Meanwhile, the controller conducts the power supply loop of the generator, after the load is stably supplied with power, the storage battery pack does not supply power to the load any more, and the energy storage power supply loop and the power supply loop of the generator jointly supply power to the load to charge the storage battery pack.
When the energy storage power supply loop cannot generate electric energy due to natural weather and cannot supply power to the load, the controller completely switches the power supply loop of the load to the power supply loop of the generator. At the moment, the electric energy output by the power supply loop of the generator supplies power for the load and charges the storage battery pack.
In this embodiment, when the power supply circuit supplies power to the load, the battery needs to be charged to maintain the full charge state of the battery. Further, in order to avoid the load damage caused by the electric energy change generated during the switching of the power supply loop, the electric energy stored in the storage battery pack is used for supplying power to the load during the switching of the power supply loop, and the quality of the electric energy transmitted to the load is not influenced by the switching of the power supply loop.
Based on the embodiment shown in fig. 2, since the storage battery pack is charged by the utility power supply circuit, the generator power supply circuit and the energy storage power supply circuit, in case of a failure of the power supply circuit for charging the storage battery pack, the storage battery pack cannot maintain a full power state, and the output power of the storage battery pack is continuously attenuated when the storage battery pack supplies power to the load. That is, the power supply circuit can be judged whether to need to be switched according to the output condition when the storage battery pack supplies power to the load.
In one embodiment, as shown in fig. 3, the present application provides another power supply system, further comprising a voltage collector; the voltage collector is arranged at the output end of the storage battery pack; the voltage collector is used for collecting the output voltage of the storage battery pack; the controller is also used for controlling the switching among the commercial power supply loop, the generator power supply loop and the energy storage power supply loop according to the output voltage acquired by the voltage acquisition device.
In a possible implementation manner, the sampling period of the voltage collector can be preset, the voltage collector detects the output voltage of the storage battery according to the sampling period interval, and feeds the detection result back to the controller, so that the controller can conveniently perform switching judgment on the power supply loop. Wherein the sampling period can be any positive number.
As an example, the sampling period may be 1 second, and the voltage collector detects the output voltage of the battery every 1 second and feeds back the detection result to the controller.
In the implementation mode, the output voltage of the storage battery pack is detected in real time through the voltage collector, and the output voltage is fed back to the controller, so that the controller can know the electric energy storage condition of the storage battery pack in real time and the power supply condition of the storage battery pack for a load. Therefore, the controller can switch the power supply loop of the load in time when the output voltage of the storage battery pack changes.
In another possible implementation manner, the voltage collector collects the output voltage of the storage battery in real time, but does not send the collection result to the controller, and when the controller considers switching the power supply loop based on other considerations, the output voltage of the storage battery at the moment can be obtained from the voltage collector.
It should be noted that, because the storage battery pack supplies power to the load during the switching of the power supply loop, in other words, in most cases, the storage battery pack is in a charging state as a standby power supply mode, or remains in a full power state, in this case, the storage battery pack does not output electric energy, and the output voltage of the storage battery pack may be 0, and the output voltage collected by the voltage collector has no reference meaning for switching the power supply loop.
In the implementation mode, the controller acquires the output voltage of the storage battery pack at the current moment from the voltage collector according to the switching requirement of the power supply loop, and determines whether to switch the power supply loop according to the output voltage. Therefore, unnecessary data transmission between the controller and the voltage collector can be reduced by the mode that the controller actively acquires the data instead of the voltage collector sends the data in real time, and the calculated amount and the electric energy consumption of switching judgment of the controller are reduced.
In addition, since the controller needs to determine whether to switch the power supply loop according to the output voltage of the storage battery pack, a reference voltage may be stored in the controller in advance, and the controller may determine whether to switch the power supply loop by comparing the output voltage with the reference voltage.
As an example, in case the output voltage is smaller than the reference voltage, the controller switches from the current supply loop to the next supply loop or switches on the next supply loop while keeping the current supply loop, depending on the switching order of "mains supply loop-tank supply loop-generator supply loop".
In this embodiment, the output end of the storage battery pack is provided with the voltage collector, the output voltage of the storage battery pack is collected in real time through the voltage collector, a judgment basis is provided for power supply switching of the controller, and the controller can efficiently and accurately switch a power supply loop of a load based on the output voltage of the storage battery.
Based on the power supply system shown in any one of the embodiments of fig. 1 to 3, in one embodiment, as shown in fig. 4, the energy storage power supply loop 103 in the power supply system 100 includes: an energy source device and an energy storage device; the output end of the energy device is connected with the input end of the energy storage device, and the output end of the energy storage device is respectively connected with the input end of the power supply loop of the generator, the controller, the load and the storage battery pack; the energy device is used for converting the acquired energy into electric energy and inputting the converted electric energy into the energy storage device for storage; the energy storage device is used for respectively supplying power to the input end of the power supply loop of the generator, the controller, the load and the storage battery pack according to the converted electric energy.
Because the energy device is greatly influenced by the weather of the nature, the energy device can continuously produce electric energy when the weather is good, and the energy device cannot produce the electric energy when the weather is severe. And the energy storage power supply loop is not the optimal loop for supplying power to the load and is not always in the state of outputting electric energy, so that the energy storage device is arranged in the energy storage power supply loop, and the generated electric energy is stored in the energy storage device firstly. When the commercial power supply circuit breaks down and the energy storage power supply circuit is needed to supply power for the load, the energy storage device outputs electric energy.
It should be noted that, when the controller is in normal use, the controller also needs to consume electric energy, and when the utility power is abnormal, the energy storage device needs to provide the controller with electric energy required by normal operation. When the generator set is started, the electric energy can be converted through the consumption of gasoline/diesel oil after a starting motor in the generator set is operated, that is, although the power supply loop of the generator can output the electric energy to supply power to a load, the power supply loop of the generator needs to provide short-term electric energy support when the power supply loop of the generator starts to be conducted, so that the power supply loop of the generator is ensured to be conducted, and the power supply loop of the generator is ensured to be conducted by the energy storage device so as to supply power to the load.
In the energy storage and power supply loop, the energy device can be any renewable resource capable of converting other energy into electric energy.
In one possible implementation, the energy device may include a wind generator and a photovoltaic power generation array; the wind driven generator and the photovoltaic power generation array are respectively connected with the input end of the energy storage device; the wind driven generator is used for converting wind energy into electric energy and inputting the converted electric energy into the energy storage device for storage; the photovoltaic power generation array is used for converting light energy into electric energy and inputting the converted electric energy into the energy storage device for storage.
It should be noted that the wind power generator and the photovoltaic power generation array are energy sources that are already well-developed and used for converting electric energy, but with the development of science and technology, there may be other renewable energy power generation modes, such as tidal energy, and the like.
In the process of generating electricity through the energy device, wind power generation and solar power generation are combined with each other and effectively complemented. Particularly, in cloudy days and rainy days, natural wind is strong, but sunlight does not have radiation force, and the electric energy efficiency of the wind driven generator is high; in sunny days, natural wind is weak, solar radiation force is strong, and the electric energy efficiency of the photovoltaic power generation array is high. By using the power generation mode of mutually combining the wind driven generator and the photovoltaic power generation array, the energy in the nature can be obtained to the maximum extent, and the defects caused by natural weather can be overcome. And the wind driven generator and the photovoltaic power generation array are connected with the input end of the energy storage device, so that the electric energy converted from natural energy can be stored in time.
In addition, in the energy storage power supply circuit, the energy storage device needs to meet the storage requirement of large electric energy, and the device has good performance and can normally store the electric energy and output the electric energy. In practical application, the energy storage device can be selected according to requirements, and the embodiment of the application does not limit the requirements.
As one example, the energy storage device may include: the device comprises a capacitor, a battery assembly and a connection control assembly; the input end of the capacitor is connected with the output end of the energy device, the output end of the capacitor is connected with the input end of the battery assembly, and the output end of the battery assembly is connected with the input end of the power supply loop of the generator, the controller and the storage battery pack through the connection control assembly; the battery assembly is used for storing the electric energy converted by the energy device through the capacitor.
The capacitor is used for storing electric charge, the battery is used for storing electric energy, the charge and discharge of the capacitor are instantaneous, for the capacitor emitting electromagnetic waves, the capacitor is charged and discharged thousands of times per second, and the charge and discharge frequency is high. The battery converts the electric energy into chemical energy for storage, so that the electric energy can be stored for a long time; when in use, the chemical energy is converted into electric energy to be output.
Based on the characteristics of the capacitor and the storage battery, the input end of the capacitor in the embodiment is connected with the energy device, and is used for receiving the electric energy generated by the energy device and rapidly charging the energy device. The output end of the capacitor is connected with the battery assembly, and electric energy is stored in the battery assembly through discharging.
When the battery assembly is required to output electric energy, the electric energy is required to be output to a corresponding power supply loop or an electronic device through the connection control assembly. In one possible implementation, the connection control component may include a switch with higher sensitivity, and a connection line controlled by the switch. In this way, by turning on and off the switch, electric energy transmission can be realized between the two electronic devices/power supply circuits connected with the control assembly.
In this embodiment, the electrical energy is generated by an energy device and stored by an energy storage device. Therefore, when the energy storage power supply loop is switched, the energy storage device can provide electric energy for the controller, and the normal operation of the controller is ensured; the power supply is carried out for the load, and the uninterrupted power supply of the load is ensured; the battery pack is charged so that the battery pack can supply power to the load during a circuit switch. In addition, the energy storage device also supplies power for the power supply loop of the generator, and when the power supply loop of the load is switched to the power supply loop of the generator, the power supply loop can normally supply power for the load. Therefore, the natural energy is converted into the electric energy to the maximum extent through the energy device and is stored, and the power supply reliability of the power supply system can be improved.
Based on the power supply system shown in any one of the above embodiments of fig. 1 to 3, in an embodiment, as shown in fig. 5, the utility power supply circuit 101 in the power supply system 100 includes: the first AC-DC rectifying circuit and the first voltage converter; the input end of the first alternating current-direct current rectifying circuit is connected with commercial power, the output end of the first alternating current-direct current rectifying circuit is connected with the input end of the first voltage converter, and the output end of the first voltage converter is respectively connected with a load and a storage battery pack; the first alternating current-direct current rectifying circuit is used for rectifying alternating current voltage transmitted by commercial power into direct current voltage; the first voltage converter is used for transforming direct-current voltage according to the power supply requirement of the load, supplying power to the load by using the transformed voltage and charging the storage battery pack.
Specifically, the first AC/DC rectification circuit may be an AC/DC converter, which is a device that converts Alternating Current (AC) into Direct Current (DC), and the power flow direction of the AC/DC converter may be bidirectional, the power flow from the power supply to the load is called rectification, and the power flow from the load back to the power supply is called active inversion. In the mains supply loop, the input of the AC/DC converter may be 50/60Hz AC, which must be rectified and filtered to supply the load.
The embodiment of the application does not limit the filter circuit, and any filter can be arranged according to actual needs, can reduce alternating current components in the pulsating direct current voltage output by the rectifier circuit, keeps the direct current components, reduces the ripple coefficient of the output voltage, and can ensure that the waveform becomes smoother.
Specifically, the first voltage converter may be an isolated DC/DC converter, which may convert a high voltage into a constant voltage required by a load, and has high conversion efficiency.
In the embodiment of the application, in a mains supply loop, a first alternating current-direct current rectification circuit and a first voltage converter are used for converting mains supply into voltage meeting the power supply requirement of a load and then supplying power to the load, so that the load can normally run.
Based on the power supply system shown in any of the embodiments of fig. 1-3, in one embodiment, as shown in fig. 6, the power generator circuit 102 of the power supply system 100 includes: the generator set, a second alternating current-direct current rectification circuit and a second voltage converter; the input end of the second alternating current-direct current rectifying circuit is connected with the output end of the generator set, the output end of the second alternating current-direct current rectifying circuit is connected with the input end of the second voltage converter, and the output end of the second voltage converter is respectively connected with the load and the storage battery pack; the second alternating current-direct current rectifying circuit is used for rectifying alternating current voltage output by the generator set into direct current voltage; the second voltage converter is used for transforming the direct-current voltage according to the power supply requirement of the load, supplying power to the load by using the transformed voltage and charging the storage battery pack.
The generator set can be a plurality of diesel/gasoline generators, and further, in order to improve the generating efficiency of the generator, a permanent magnet motor can be installed on an output shaft of the generator, and the embodiment of the application does not limit the generator set.
As an example, the second ac/DC rectification circuit may also be a three-phase rectification/inversion circuit, the second voltage converter may be a DC/DC converter, and the DC/DC converter may be an isolated type or a non-isolated type, which is not limited herein.
In this application embodiment, in generator power supply circuit, generating set produces power frequency alternating current, through second alternating current-direct current rectifier circuit and second voltage converter, after changing power frequency alternating current into the direct current that satisfies load power supply demand voltage, for the load power supply for the load can normal operating.
Based on the power supply system shown in any of the above embodiments, in one embodiment, as shown in fig. 7, the power supply system 100 further includes a bidirectional converter 107, and the bidirectional converter 107 is connected between the load and the battery pack for bidirectional transmission of electric energy between the load and the battery pack.
In one possible implementation, the bidirectional converter includes a diode 1071, an inductor 1072, a capacitor 1073, and two switching tubes 1074; the two switching tubes 1074 are connected in series and then connected in parallel with the capacitor 1073, and the inductor 1072 is connected with one end of the two switching tubes 1074 connected in series; the two switching tubes 1074 are connected in parallel with the diode 1071.
Specifically, as shown in fig. 8, the bidirectional converter may be a non-isolated bidirectional half-bridge DC/DC converter based on a Buck-Boost (Buck chopper-Boost chopper), the structure has no transformer, the number of power switching devices is relatively small, the operation and control manner is easy, energy bidirectional flow is finally realized through the anti-parallel diodes of the fully-controlled switching devices, the material for constructing the converter can be saved, and the conversion efficiency is high.
Continuing to refer to fig. 8, in actual operation, when the bidirectional converter is in the Buck mode, the anti-parallel diodes of the two switching tubes form the Buck converter, the output voltage of the Buck converter is smaller than the input voltage, the energy in the whole circuit is transferred from right to left, and at this time, the storage battery pack is in a charging state; when the converter is in a Boost mode, the anti-parallel diodes of the two switching tubes form the Boost converter, the output voltage of the Boost converter is greater than the input voltage, the energy in the whole circuit flows from left to right, and the storage battery is in a discharge state at the moment.
In the embodiment of the application, the bidirectional converter is arranged between the storage battery and the load, so that on one hand, the inductance can be reduced, and further, the inductance volume can be reduced; on the other hand, the ripple of the inductive current can be reduced, so that the ripple of the charging and discharging current of the storage battery pack can be reduced, and the service life of the storage battery pack is prolonged.
It will be understood by those skilled in the art that all or part of the switching control process for implementing the controller according to the above embodiments may be implemented by using a computer program to instruct related hardware, where the computer program may be stored in a non-volatile computer readable storage medium, and when executed, the computer program may include the procedures of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A power supply system, characterized in that the power supply system comprises: the system comprises a mains supply circuit, a generator power supply circuit, an energy storage power supply circuit and a controller; the mains supply loop, the generator power supply loop and the energy storage power supply loop are all connected with the controller;
and the controller is used for controlling the energy storage power supply loop and/or the generator power supply loop to supply power to a load when the commercial power supply loop breaks down.
2. The power supply system of claim 1, further comprising a battery pack; the mains supply loop, the generator power supply loop and the energy storage power supply loop are all connected with the input end of the storage battery pack; the output end of the storage battery pack is connected with the load;
the mains supply circuit, the generator power supply circuit and the energy storage power supply circuit are all used for charging the storage battery pack;
and the storage battery pack is used for supplying power to the load during the switching period of the commercial power supply circuit, the generator power supply circuit and the energy storage power supply circuit.
3. The power supply system of claim 2, further comprising a voltage harvester; the voltage collector is arranged at the output end of the storage battery pack;
the voltage collector is used for collecting the output voltage of the storage battery pack;
the controller is further used for controlling the switching among the mains supply circuit, the generator power supply circuit and the energy storage power supply circuit according to the output voltage collected by the voltage collector.
4. A power supply system as claimed in any one of claims 1 to 3, wherein the energy storage supply circuit comprises: an energy source device and an energy storage device; the output end of the energy device is connected with the input end of the energy storage device, and the output end of the energy storage device is respectively connected with the input end of the power supply loop of the generator, the controller, the load and the storage battery pack;
the energy device is used for converting the acquired energy into electric energy and inputting the converted electric energy into the energy storage device for storage;
and the energy storage device is used for respectively supplying power to the input end of the power supply loop of the generator, the controller, the load and the storage battery pack according to the converted electric energy.
5. The power supply system of claim 4, wherein the energy source device comprises: wind generators and photovoltaic power generation arrays; the wind driven generator and the photovoltaic power generation array are respectively connected with the input end of the energy storage device;
the wind driven generator is used for converting wind energy into electric energy and inputting the converted electric energy into the energy storage device for storage; the photovoltaic power generation array is used for converting light energy into electric energy and inputting the converted electric energy into the energy storage device for storage.
6. The power supply system of claim 4, wherein the energy storage device comprises: the device comprises a capacitor, a battery assembly and a connection control assembly; the input end of the capacitor is connected with the output end of the energy device, the output end of the capacitor is connected with the input end of the battery pack, and the output end of the battery pack is connected with the input end of the power supply loop of the generator, the controller and the storage battery pack through the connection control assembly;
and the battery assembly is used for storing the electric energy converted by the energy device through the capacitor.
7. A power supply system as claimed in any one of claims 1 to 3, characterized in that the mains supply loop comprises: the first AC-DC rectifying circuit and the first voltage converter; the input end of the first AC-DC rectification circuit is connected with a mains supply, the output end of the first AC-DC rectification circuit is connected with the input end of the first voltage converter, and the output end of the first voltage converter is respectively connected with the load and the storage battery pack;
the first alternating current-direct current rectifying circuit is used for rectifying alternating current voltage transmitted by commercial power into direct current voltage;
the first voltage converter is used for transforming the direct-current voltage according to the power supply requirement of the load, supplying power to the load by using the transformed voltage, and charging the storage battery pack.
8. The power supply system of any one of claims 1-3, wherein the generator power supply loop comprises: the generator set, a second alternating current-direct current rectification circuit and a second voltage converter; the input end of the second AC-DC rectifying circuit is connected with the output end of the generator set, the output end of the second AC-DC rectifying circuit is connected with the input end of the second voltage converter, and the output end of the second voltage converter is respectively connected with the load and the storage battery pack;
the second alternating current-direct current rectifying circuit is used for rectifying alternating current voltage output by the generator set into direct current voltage;
and the second voltage converter is used for transforming the direct-current voltage according to the power supply requirement of the load, supplying power to the load by using the transformed voltage and charging the storage battery pack.
9. The power supply system according to any one of claims 1 to 3, characterized in that the power supply system further comprises: a bidirectional converter connected between the load and a battery pack;
and the bidirectional converter is used for carrying out bidirectional transmission on the electric energy between the load and the storage battery pack.
10. The power supply system of claim 9, wherein the bidirectional converter comprises a diode, an inductor, a capacitor, and two switching tubes; the two switching tubes are connected in series and then connected in parallel with the capacitor, and the inductor is connected with one end of the two switching tubes connected in series; the two switching tubes are connected with the diode in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110565000.6A CN113328512A (en) | 2021-05-24 | 2021-05-24 | Power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110565000.6A CN113328512A (en) | 2021-05-24 | 2021-05-24 | Power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113328512A true CN113328512A (en) | 2021-08-31 |
Family
ID=77416475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110565000.6A Pending CN113328512A (en) | 2021-05-24 | 2021-05-24 | Power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113328512A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839460A (en) * | 2021-09-02 | 2021-12-24 | 华为数字能源技术有限公司 | Power supply system, power supply method and power supply device |
| CN113985781A (en) * | 2021-10-28 | 2022-01-28 | 广东电网有限责任公司广州供电局 | Emergency power supply vehicle excitation control method based on instruction filtering backstepping controller |
| CN114513037A (en) * | 2022-01-21 | 2022-05-17 | 山东泰开直流技术有限公司 | Low-voltage intelligent direct-current power supply system and operation method |
| CN117117942A (en) * | 2023-10-23 | 2023-11-24 | 赣州银盛电子有限公司 | Intelligent building power conversion system based on visual equipment cluster and power supply method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0130242A1 (en) * | 1983-06-29 | 1985-01-09 | SOCIETA' TECNICO INDUSTRIALE FRIGORIFERA S.T.I.F. S.p.A. | Apparatus for using an induction motor as an electrical generator |
| CN101604865A (en) * | 2009-07-24 | 2009-12-16 | 上海致远绿色能源有限公司 | Wind power generation system for low-voltage DC power supply |
| CN102480164A (en) * | 2010-11-26 | 2012-05-30 | 中兴通讯股份有限公司 | Hybrid energy power supply system and hybrid energy power supply method |
| CN102810901A (en) * | 2012-07-30 | 2012-12-05 | 西南交通大学 | Communication power supply system based on fuel cell |
| CN202586481U (en) * | 2012-05-07 | 2012-12-05 | 西北工业大学 | Micro electrical network intelligent balanced charging and power supply system |
| CN106160162A (en) * | 2016-07-12 | 2016-11-23 | 苏州协鑫集成科技工业应用研究院有限公司 | Electric power system |
| CN107017696A (en) * | 2017-03-30 | 2017-08-04 | 先控捷联电气股份有限公司 | Energy storage UPS electric power systems and control method |
| CN107612029A (en) * | 2017-09-22 | 2018-01-19 | 深圳市沃特玛电池有限公司 | A kind of electric power system |
| EP3751691A1 (en) * | 2019-06-12 | 2020-12-16 | Wobben Properties GmbH | Electrical power system |
-
2021
- 2021-05-24 CN CN202110565000.6A patent/CN113328512A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0130242A1 (en) * | 1983-06-29 | 1985-01-09 | SOCIETA' TECNICO INDUSTRIALE FRIGORIFERA S.T.I.F. S.p.A. | Apparatus for using an induction motor as an electrical generator |
| CN101604865A (en) * | 2009-07-24 | 2009-12-16 | 上海致远绿色能源有限公司 | Wind power generation system for low-voltage DC power supply |
| CN102480164A (en) * | 2010-11-26 | 2012-05-30 | 中兴通讯股份有限公司 | Hybrid energy power supply system and hybrid energy power supply method |
| CN202586481U (en) * | 2012-05-07 | 2012-12-05 | 西北工业大学 | Micro electrical network intelligent balanced charging and power supply system |
| CN102810901A (en) * | 2012-07-30 | 2012-12-05 | 西南交通大学 | Communication power supply system based on fuel cell |
| CN106160162A (en) * | 2016-07-12 | 2016-11-23 | 苏州协鑫集成科技工业应用研究院有限公司 | Electric power system |
| CN107017696A (en) * | 2017-03-30 | 2017-08-04 | 先控捷联电气股份有限公司 | Energy storage UPS electric power systems and control method |
| CN107612029A (en) * | 2017-09-22 | 2018-01-19 | 深圳市沃特玛电池有限公司 | A kind of electric power system |
| EP3751691A1 (en) * | 2019-06-12 | 2020-12-16 | Wobben Properties GmbH | Electrical power system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839460A (en) * | 2021-09-02 | 2021-12-24 | 华为数字能源技术有限公司 | Power supply system, power supply method and power supply device |
| CN113985781A (en) * | 2021-10-28 | 2022-01-28 | 广东电网有限责任公司广州供电局 | Emergency power supply vehicle excitation control method based on instruction filtering backstepping controller |
| CN113985781B (en) * | 2021-10-28 | 2024-02-06 | 广东电网有限责任公司广州供电局 | Emergency power supply vehicle excitation control method based on command filtering backstepping controller |
| CN114513037A (en) * | 2022-01-21 | 2022-05-17 | 山东泰开直流技术有限公司 | Low-voltage intelligent direct-current power supply system and operation method |
| CN117117942A (en) * | 2023-10-23 | 2023-11-24 | 赣州银盛电子有限公司 | Intelligent building power conversion system based on visual equipment cluster and power supply method |
| CN117117942B (en) * | 2023-10-23 | 2024-02-13 | 赣州银盛电子有限公司 | Intelligent building power conversion system based on visual equipment cluster and power supply method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103441566B (en) | The collaborative electric power system of a kind of civil power, photovoltaic cell and energy-storage battery and method | |
| CN113328512A (en) | Power supply system | |
| KR101698771B1 (en) | temperature controlling system of battery and controlling method thereof | |
| US9293923B2 (en) | Energy storage system and controlling method of the same | |
| Zhang et al. | Power management strategy research for DC microgrid with hybrid storage system | |
| CN111953016B (en) | Mobile multi-energy micro-grid control method and system | |
| CN105245018A (en) | Distributed energy storage system for improving confidence capacitance of photovoltaic power station | |
| CN104320048A (en) | Photovoltaic power generation system with energy storage function and coordinated power supply method of photovoltaic power generation system | |
| CN113612260A (en) | Electric-hydrogen island direct current micro-grid operation control method | |
| KR20140040612A (en) | Temperature controlling system of battery and energy storage system using the same and controlling method thereof | |
| CN102931722A (en) | Distributed power supply management method and system | |
| CN115800349A (en) | Power balancing method and device for direct-current micro-grid | |
| Yu et al. | A fully autonomous power management strategy for DC microgrid bus voltages | |
| Nayar | Control and interfacing of bi-directional inverters for off-grid and weak grid photovoltaic power systems | |
| CN202134923U (en) | Deep charging and discharging type battery energy storage paralleling device | |
| Xu et al. | Energy management and control strategy for DC micro-grid in data center | |
| KR20140013553A (en) | Hybrid photovoltaic system | |
| CN114899870A (en) | Alternating current-direct current hybrid micro-grid system and control method | |
| CN103490500A (en) | Multifunctional renewable energy source converting system | |
| CN204886203U (en) | Qualities of wind -powered electricity generation stable and electric energy of transient state of a system that is incorporated into power networks are improved energy memory | |
| RU2726735C1 (en) | Self-contained power supply system with combined energy storage unit | |
| CN203537052U (en) | Multifunctional renewable energy source converting system | |
| Swarnkar et al. | Comparative analysis of isolated and non-isolated Bi-directional DC-DC converters for DC microgrid | |
| CN102195295A (en) | Wind-solar-fuel storage battery hybrid grid-connected and off-grid dual-purpose system | |
| CN111146795A (en) | Distributed photovoltaic power generation energy storage management control system |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210831 |
|
| RJ01 | Rejection of invention patent application after publication |