CN109245293B - Power supply device and power supply method thereof - Google Patents
Power supply device and power supply method thereof Download PDFInfo
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- CN109245293B CN109245293B CN201811064418.3A CN201811064418A CN109245293B CN 109245293 B CN109245293 B CN 109245293B CN 201811064418 A CN201811064418 A CN 201811064418A CN 109245293 B CN109245293 B CN 109245293B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J11/00—Circuit arrangements for providing service supply to auxiliaries of stations in which electric power is generated, distributed or converted
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
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- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a power supply method of a power supply device and the power supply device, which can be applied to the technical field of ring main units in intelligent power distribution networks. The power supply method provided by the invention comprises the following steps: when the alternating current power supply supplies power normally, alternating current is converted into direct current, and the direct current supplies power to a load through a direct current bus and is charged in a storage battery pack; and acquiring the voltage of the direct current bus in real time, judging the voltage of the direct current bus, and if the voltage of the direct current bus is less than the upper limit value of the voltage of the storage battery pack, simultaneously supplying power to a load by the alternating current power supply and the storage battery pack. The invention increases the cycle working frequency of the storage battery, realizes the activation of the storage battery and prolongs the service time of the storage battery.
Description
Technical Field
The invention relates to a power supply method of a power supply device and the power supply device, which can be applied to the technical field of ring main units in intelligent power distribution networks.
Background
With the continuous progress of society, the national economy is rapidly developed, high and new technologies are widely popularized and applied in an electric power system, and the utilization rate of the ring main unit is increased day by day, so that the ring main unit serving as a ring main unit of a ring main power supply terminal system is more important. The ring main unit is a group of high-voltage switch equipment, is arranged in a steel plate metal cabinet or is made into electrical equipment of an assembled interval ring main power supply unit, and is widely applied to power distribution stations of load centers such as urban districts, factory enterprises and the like. The ring main unit can greatly improve the power supply reliability and economy of the power distribution network as the main power equipment of the intelligent power distribution network, reduce the labor intensity, improve the management level and the service quality, and promote the development of the intelligent power distribution network.
However, with the increasing of the distribution network, the problem of power supply of the distribution network automation terminal and the communication equipment becomes more prominent. Meanwhile, the ring main unit is mostly installed outdoors, the service life of equipment is shortened due to the severe operation environment of the power distribution network, and the use effect of the power distribution automation system is further influenced. In addition, the cabinet is not provided with a power supply, a power supply device for supplying power to the sensor and the communication equipment in the cabinet needs to have energy-taking capacity, and the power supply also needs to be capable of keeping the communication equipment powered on to transmit fault information when the distribution network is in fault.
The power supply device in the present intelligent ring main unit has several forms: 1) the PT power supply is realized by acquiring the energy on the primary side line for power supply, so that the power supply is not influenced by rainy weather, and the power supply aspect is greatly guaranteed; however, only the basic function of voltage mutual inductance is achieved, the function is single, meanwhile, power failure is needed in maintenance or modification, the primary side of the PT can be connected into a circuit only by modifying the ring main unit, and if the ring main unit is large in popularization and use engineering quantity and can be implemented only by waiting for maintenance in power failure, the implementation period is long; 2) the CT is used for electricity, and because the initial application of the technology is always biased to low-power electricity, the high-power CT needs to be specially customized by a manufacturer, has a large size and cannot be directly installed in the ring main unit; 3) the solar energy power taking is limited by the geographical position and weather influence of the ring main unit, the power is small, and the energy taking is unstable; 4) the storage battery takes electricity, the energy density is large, and the endurance time is long; however, the ring main units are in outdoor environments for a long time, and need to endure high and low temperature environments, and especially need to bear large load current when the switches are switched on and off, so that the performance requirements of the storage batteries are extremely high, the storage batteries are easy to lose effectiveness due to sudden change of the voltage of the batteries, meanwhile, the number of recycling times is small, irregular maintenance is mostly needed, the ring main units are large in installation number and wide in distribution, and the later maintenance work of the power supply is heavy; 5) the super capacitor is used for supplying power, has the characteristic of high power density, can provide high power in a short time, but has low energy density and short power supply time.
To the above-mentioned circumstances, chinese utility model patent that the grant bulletin number is CN 202363924U authorizes the document and discloses a multifunctional power management system, this system includes PT double-circuit auto-change over device, ultracapacitor system group and lithium ion storage battery, PT supplies power and charges to ultracapacitor system group and lithium ion storage battery through PT double-circuit auto-change over device to the load, when PT side trouble perhaps overhauls, just can drop into storage battery and carry out stand-by power supply, but this power supply mode can cause the battery ageing because storage battery uses infrequently, the life-span shortens.
Disclosure of Invention
The invention aims to provide a power supply method of a power supply device and the power supply device, which are used for solving the problems of aging and short service life of a storage battery pack caused by the fact that the storage battery pack is not frequently used in the conventional power supply mode.
In order to achieve the above object, the present invention provides a power supply method of a power supply device and a power supply device, the power supply method of the power supply device includes the following steps:
when the alternating current power supply supplies power normally, alternating current is converted into direct current, and the direct current supplies power to a load through a direct current bus and is charged in a storage battery pack;
and acquiring the direct current bus voltage in real time, judging the direct current bus voltage, and if the direct current bus voltage is less than the voltage upper limit value of the storage battery pack, simultaneously supplying power to a load by the alternating current power supply and the storage battery pack.
The method has the advantages that the voltage of the direct current bus is collected, the collected information is analyzed and judged, the power supply mode is further determined, the judging method is simple and accurate, the practicability is high, the power supply requirement of the load is met, waste is avoided, uninterrupted power supply is realized, power failure is not needed when a circuit is modified, the maintenance workload is saved, the safety and reliability of power supply are improved, meanwhile, the cycle working frequency of the storage battery is increased, the activation of the storage battery is realized, and the service life of the storage battery is prolonged.
Further, when the alternating current power supply loses power, the storage battery supplies power to the load, the voltage value of the storage battery is collected in real time, the voltage value of the storage battery is judged, and if the voltage value of the storage battery is smaller than the lower limit value of the voltage of the storage battery, the power supply to the load is stopped.
When the alternating current power supply loses power, the voltage of the storage battery pack is judged in time so as to prevent the storage battery pack from being influenced by excessive power consumption and service life of the storage battery pack.
A power supply method of a power supply apparatus, comprising the steps of:
when the alternating current power supply supplies power normally, alternating current is converted into direct current, and the direct current supplies power to a load through a direct current bus and is charged in a storage battery pack and a super capacitor;
collecting the voltage of a direct current bus in real time, judging the voltage of the direct current bus, and if the voltage upper limit value of a super capacitor is less than the voltage of the direct current bus and less than the voltage upper limit value of a storage battery pack, supplying power to a load by the alternating current power supply and the storage battery pack at the same time, wherein the voltage upper limit value of the super capacitor is less than the voltage upper limit value of the storage battery pack;
and if the lower voltage limit value of the storage battery pack is less than the lower voltage limit value of the direct-current bus voltage and less than the lower voltage limit value of the super capacitor, the alternating-current power supply, the super capacitor and the storage battery pack simultaneously supply power to a load, wherein the lower voltage limit value of the super capacitor is greater than the lower voltage limit value of the storage battery pack.
The method has the advantages that the power supply of the super capacitor is increased on the basis of the storage battery pack, the power supply time is prolonged by various standby power supplies, a level is added for judging the voltage, the voltage is accurately judged, the power supply mode is selected, the power supply requirement is met, and resources are not wasted. The method has the advantages that the voltage of the direct current bus is collected, the collected information is analyzed and judged, the power supply mode is further determined, the judging method is simple and accurate, the practicability is high, the power supply requirement of the load is met, waste is avoided, uninterrupted power supply is realized, power failure is not needed when a circuit is modified, the maintenance workload is saved, the safety and reliability of power supply are improved, meanwhile, the cycle working frequency of the storage battery is increased, the activation of the storage battery is realized, and the service life of the storage battery is prolonged.
Furthermore, when the alternating current power supply loses power, the storage battery supplies power to the load, the power of the storage battery, the super capacitor and the voltage of the storage battery are collected in real time for analysis and judgment,
if the power required by the load is larger than the power provided by the storage battery pack, the super capacitor and the storage battery pack supply power to the load at the same time;
if the voltage value of the storage battery pack is less than the lower voltage limit value of the storage battery pack, the super capacitor supplies power to the load;
and if the voltage value of the super capacitor is less than the lower limit value of the voltage of the super capacitor, stopping supplying power to the load.
When the alternating current power supply loses power, the voltages of the storage battery pack and the super capacitor are judged in time, so that the problem that the service life of the storage battery pack is influenced by excessive power consumption of the storage battery pack is avoided, and meanwhile, the service life of the super capacitor can be ensured.
A power supply apparatus comprising a power management unit, the power management unit comprising a processor and a memory, the processor running a computer program stored in the memory to implement the steps of:
when the alternating current power supply supplies power normally, alternating current is converted into direct current, and the direct current supplies power to a load through a direct current bus and is charged in a storage battery pack;
and acquiring the direct current bus voltage in real time, judging the direct current bus voltage, and if the direct current bus voltage is less than the voltage upper limit value of the storage battery pack, simultaneously supplying power to a load by the alternating current power supply and the storage battery pack.
Further, when the alternating current power supply loses power, the storage battery supplies power to the load, the voltage value of the storage battery is collected in real time, the voltage value of the storage battery is judged, and if the voltage value of the storage battery is smaller than the lower limit value of the voltage of the storage battery, the power supply to the load is stopped.
A power supply apparatus comprising a power management unit, the power management unit comprising a processor and a memory, the processor running a computer program stored in the memory to implement the steps of:
when the alternating current power supply supplies power normally, alternating current is converted into direct current, and the direct current supplies power to a load through a direct current bus and is charged in a storage battery pack and a super capacitor;
collecting the voltage of a direct current bus in real time, judging the voltage of the direct current bus, and if the voltage upper limit value of a super capacitor is less than the voltage of the direct current bus and less than the voltage upper limit value of a storage battery pack, supplying power to a load by the alternating current power supply and the storage battery pack at the same time, wherein the voltage upper limit value of the super capacitor is less than the voltage upper limit value of the storage battery pack;
and if the lower voltage limit value of the storage battery pack is less than the lower voltage limit value of the direct-current bus voltage and less than the lower voltage limit value of the super capacitor, the alternating-current power supply, the super capacitor and the storage battery pack simultaneously supply power to a load, wherein the lower voltage limit value of the super capacitor is greater than the lower voltage limit value of the storage battery pack.
Furthermore, when the alternating current power supply loses power, the storage battery supplies power to the load, the power of the storage battery, the super capacitor and the voltage of the storage battery are collected in real time for analysis and judgment,
if the power required by the load is larger than the power provided by the storage battery pack, the super capacitor and the storage battery pack supply power to the load at the same time;
if the voltage value of the storage battery pack is less than the lower voltage limit value of the storage battery pack, the super capacitor supplies power to the load;
and if the voltage value of the super capacitor is less than the lower limit value of the voltage of the super capacitor, stopping supplying power to the load.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the power supply apparatus of embodiment 1 of the present invention when the AC power supply is normal;
fig. 3 is a schematic power supply diagram of the ac power supply according to embodiment 1 of the present invention when the ac power supply is lost.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
Power supply apparatus example 1:
as shown in fig. 1, the power supply apparatus includes an AC power supply, wherein AC power of a primary power grid is subjected to PT voltage reduction processing, and then the reduced AC power is converted into DC power by AC/DC, and the DC power is transmitted through a DC bus (DC bus), and then is transmitted through a DC/DC connection LOAD (LOAD1, LOAD 2); the system also comprises a Super Capacitor (SC) and a storage battery pack (Batt), wherein the super capacitor and the storage battery pack are connected with a direct current bus in parallel through DC/DC; the power management unit is connected with the AC/DC, each DC/DC and the background management platform.
In this embodiment, the backup power source is a super capacitor and a storage battery, and as other embodiments, the backup power source may also be a plurality of super capacitors and a plurality of storage batteries, which may be put in the power cabinet.
The power supply management unit can manage the storage battery pack through the current and voltage information of the storage battery pack, can perform uniform charging and floating charging, and can also discharge the storage battery pack according to the requirement of a load, so that the activation of the storage battery can be realized; meanwhile, the super capacitor can be managed according to the voltage and current information of the super capacitor, can be charged and can also be discharged according to the requirement of a load. In addition, the information in the power supply device can be transmitted to a DTU (not shown in the figure), and the state of the power supply device of the intelligent ring main unit can be mastered in real time.
The working process is as follows:
(1) PT normal (ac power supply normal) condition is as shown in fig. 2: 1) under normal load condition, the primary power grid steps down through PT, supplies power for charging to the storage battery and the super capacitor after AC/DC rectification, and supplies power of load, namely PPT＝PSC+PBatt+PLOAD1+PLOAD2In which P isPTFor AC mains power, PSCFor super capacitor power, PBattIs the battery power, PLOAD1Is loaded with LOAD1 power, PLOAD2LOAD2 power for LOAD; when the charging of the storage battery pack and the super battery is finished, the AC power supply independently provides the power of the load, namely PPT＝PLOAD1+PLOAD2Meanwhile, the power management platform collects the voltage of the DC bus in real time and judges the voltage value of the DC bus so as to make a corresponding instruction; 2) in the case of sudden load increase, the voltage of the DC bus will decrease, when the value of the DC bus voltage > that of the battery packThe upper limit value of the voltage is that the AC power supply supplies power to the load, namely PPT＝PLOAD1+PLOAD2(ii) a When the upper limit of the voltage of the super capacitor is less than the upper limit of the voltage of the DC bus and less than the upper limit of the voltage of the storage battery pack, the AC power supply and the storage battery pack simultaneously supply power to the load, namely PPT+PBatt＝PLOAD1+PLOAD2Wherein the upper voltage limit value of the super capacitor is less than the upper voltage limit value of the storage battery pack; when the lower voltage limit of the storage battery pack is less than the DC bus voltage value and less than the lower voltage limit of the super capacitor, the AC power supply, the super capacitor and the storage battery pack simultaneously supply power to a load, namely PPT+PSC+PBatt＝PLOAD1+PLOAD2And the lower voltage limit value of the super capacitor is larger than the lower voltage limit value of the storage battery pack.
(2) When PT loses power (AC power loss) (P)PT0) as shown in FIG. 3: under normal load condition, when the power required by the load is less than the power provided by the storage battery pack, the storage battery pack supplies power to the load, namely PBatt＝PLOAD1+PLOAD2(ii) a When the power needed by the load is larger than the power provided by the storage battery pack, the super capacitor and the storage battery pack supply power to the load at the same time, namely PSC+PBatt＝PLOAD1+PLOAD2(ii) a When the voltage value of the storage battery pack is less than the lower limit value of the storage battery pack voltage, the super capacitor supplies power to the load, namely PSC＝PLOAD1+PLOAD2(ii) a And when the voltage value of the super capacitor is smaller than the lower limit value of the voltage of the super capacitor, stopping supplying power to the load, stopping outputting data after a period of time, and outputting no power.
Power supply apparatus example 2:
the power supply device comprises an alternating current power supply, alternating current of a primary power grid is subjected to PT voltage reduction treatment, then the reduced alternating current is converted into direct current through AC/DC, the direct current is transmitted through a direct current bus (DC bus), and the direct current is transmitted through DC/DC connection LOADs (LOAD1, LOSD 2); the battery pack is connected with a direct current bus through DC/DC; the power management unit is connected with the AC/DC, each DC/DC and the background management platform.
In this embodiment, the backup power source is a battery pack, and as another embodiment, the backup power source may also be a plurality of battery packs, and the backup power source may be placed in the power cabinet.
The power management unit can manage the storage battery pack through the current and voltage information of the storage battery pack, can perform charging of uniform charging and floating charging, and can also perform discharging according to the requirement of a load, so that the activation of the storage battery can be realized. In addition, the information in the power supply device can be transmitted to a DTU (not shown in the figure), and the state of the power supply device of the intelligent ring main unit can be mastered in real time.
The working process is as follows:
(1) PT normal (ac power supply normal): 1) under normal load, the primary grid steps down through PT, and supplies power for charging to the storage battery after AC/DC rectification, and supplies power of the load, namely PPT＝PBatt+PLOAD1+PLOAD2In which P isPTFor AC mains power, PBattIs the battery power, PLOAD1Is loaded with LOAD1 power, PLOAD2LOAD2 power for LOAD; when the charging of the storage battery pack is finished, the AC power supply independently provides the power of the load, namely PPT＝PLOAD1+PLOAD2Meanwhile, the power management platform collects the voltage of the DC bus in real time and judges the voltage value of the DC bus so as to make a corresponding instruction; 2) under the condition of sudden load increase, the voltage of the DC bus is reduced, and when the voltage value of the DC bus is greater than the voltage upper limit value of the storage battery pack, the AC power supply supplies power to the load, namely PPT＝PLOAD1+PLOAD2(ii) a When the DC bus voltage value is less than the upper limit voltage value of the storage battery pack, the AC power supply and the storage battery pack supply power to the load at the same time, namely PPT+PBatt＝PLOAD1+PLOAD2。
(2) When PT loses power (AC power loss) (P)PT0): under normal load condition, when the power required by the load is less than the power provided by the storage battery pack, the storage battery pack supplies power to the load, namely PBatt＝PLOAD1+PLOAD2(ii) a When the voltage value of the storage battery pack is less than the lower voltage limit of the storage battery packAnd if the value is less than the preset value, stopping supplying power to the load, and stopping outputting data after a period of time, wherein no power is output.
Power supply method of power supply apparatus embodiment 1:
the power supply method of the power supply device comprises the following steps:
when the alternating current power supply supplies power normally, alternating current is converted into direct current, and the direct current supplies power to a load through a direct current bus and is charged in a storage battery pack and a super capacitor;
collecting the voltage of a direct current bus in real time, judging the voltage of the direct current bus, and if the voltage upper limit value of a super capacitor is less than the voltage of the direct current bus and less than the voltage upper limit value of a storage battery pack, supplying power to a load by the alternating current power supply and the storage battery pack at the same time, wherein the voltage upper limit value of the super capacitor is less than the voltage upper limit value of the storage battery pack;
and if the lower voltage limit value of the storage battery pack is less than the lower voltage limit value of the direct-current bus voltage and less than the lower voltage limit value of the super capacitor, the alternating-current power supply, the super capacitor and the storage battery pack simultaneously supply power to a load, wherein the lower voltage limit value of the super capacitor is greater than the lower voltage limit value of the storage battery pack.
The specific steps of the power supply method in this embodiment are already described in embodiment 1 of the power supply apparatus, and are not described herein again.
Power supply method of power supply apparatus embodiment 2:
the power supply method of the power supply device comprises the following steps:
when the alternating current power supply supplies power normally, alternating current is converted into direct current, and the direct current supplies power to a load through a direct current bus and is charged in a storage battery pack;
and acquiring the direct current bus voltage in real time, judging the direct current bus voltage, and if the direct current bus voltage is less than the voltage upper limit value of the storage battery pack, simultaneously supplying power to a load by the alternating current power supply and the storage battery pack.
The specific steps of the power supply method in this embodiment are already described in embodiment 2 of the power supply apparatus, and are not described herein again.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention as defined in the appended claims.
Claims (4)
1. A method of supplying power to a power supply device, comprising the steps of:
when the alternating current power supply supplies power normally, alternating current is converted into direct current, and the direct current supplies power to a load through a direct current bus and is charged in a storage battery pack and a super capacitor;
collecting the voltage of a direct current bus in real time, judging the voltage of the direct current bus, and if the voltage upper limit value of a super capacitor is less than the voltage of the direct current bus and less than the voltage upper limit value of a storage battery pack, supplying power to a load by the alternating current power supply and the storage battery pack at the same time, wherein the voltage upper limit value of the super capacitor is less than the voltage upper limit value of the storage battery pack;
and if the lower voltage limit value of the storage battery pack is less than the lower voltage limit value of the direct-current bus voltage and less than the lower voltage limit value of the super capacitor, the alternating-current power supply, the super capacitor and the storage battery pack simultaneously supply power to a load, wherein the lower voltage limit value of the super capacitor is greater than the lower voltage limit value of the storage battery pack.
2. The power supply method according to claim 1, wherein when the AC power supply loses power, the storage battery supplies power to the load, the power of the storage battery, the voltage of the super capacitor and the storage battery are collected in real time to be analyzed and judged,
if the power required by the load is larger than the power provided by the storage battery pack, the super capacitor and the storage battery pack supply power to the load at the same time;
if the voltage value of the storage battery pack is less than the lower voltage limit value of the storage battery pack, the super capacitor supplies power to the load;
and if the voltage value of the super capacitor is less than the lower limit value of the voltage of the super capacitor, stopping supplying power to the load.
3. A power supply apparatus comprising a power management unit including a processor and a memory, wherein the processor runs a computer program stored in the memory to implement the steps of:
when the alternating current power supply supplies power normally, alternating current is converted into direct current, and the direct current supplies power to a load through a direct current bus and is charged in a storage battery pack and a super capacitor;
collecting the voltage of a direct current bus in real time, judging the voltage of the direct current bus, and if the voltage upper limit value of a super capacitor is less than the voltage of the direct current bus and less than the voltage upper limit value of a storage battery pack, supplying power to a load by the alternating current power supply and the storage battery pack at the same time, wherein the voltage upper limit value of the super capacitor is less than the voltage upper limit value of the storage battery pack;
and if the lower voltage limit value of the storage battery pack is less than the lower voltage limit value of the direct-current bus voltage and less than the lower voltage limit value of the super capacitor, the alternating-current power supply, the super capacitor and the storage battery pack simultaneously supply power to a load, wherein the lower voltage limit value of the super capacitor is greater than the lower voltage limit value of the storage battery pack.
4. The power supply device according to claim 3, wherein when the AC power supply loses power, the storage battery supplies power to the load, the power of the storage battery, the super capacitor and the voltage of the storage battery are collected in real time for analysis and judgment,
if the power required by the load is larger than the power provided by the storage battery pack, the super capacitor and the storage battery pack supply power to the load at the same time;
if the voltage value of the storage battery pack is less than the lower voltage limit value of the storage battery pack, the super capacitor supplies power to the load;
and if the voltage value of the super capacitor is less than the lower limit value of the voltage of the super capacitor, stopping supplying power to the load.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202696203U (en) * | 2012-06-19 | 2013-01-23 | 航天科工深圳（集团）有限公司 | Intelligent ring main unit and power unit thereof |
| CN202856451U (en) * | 2012-11-15 | 2013-04-03 | 浙江三辰电器有限公司 | Miniature intelligent direct current power supply |
| CN108110877A (en) * | 2017-12-12 | 2018-06-01 | 中国科学院广州能源研究所 | A kind of subway mixed energy storage system |
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2018
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202696203U (en) * | 2012-06-19 | 2013-01-23 | 航天科工深圳（集团）有限公司 | Intelligent ring main unit and power unit thereof |
| CN202856451U (en) * | 2012-11-15 | 2013-04-03 | 浙江三辰电器有限公司 | Miniature intelligent direct current power supply |
| CN108110877A (en) * | 2017-12-12 | 2018-06-01 | 中国科学院广州能源研究所 | A kind of subway mixed energy storage system |
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