CN112436586A - Power supply system based on double super capacitor sets - Google Patents
Power supply system based on double super capacitor sets Download PDFInfo
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- CN112436586A CN112436586A CN202011342436.0A CN202011342436A CN112436586A CN 112436586 A CN112436586 A CN 112436586A CN 202011342436 A CN202011342436 A CN 202011342436A CN 112436586 A CN112436586 A CN 112436586A
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- super capacitor
- capacitor bank
- power supply
- charging
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- 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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The utility model provides a power supply system based on two super capacitor groups, relates to intelligent distribution network line state monitoring field, especially is used for transient state record type fault indicator to collect the power supply system of two super capacitor and electric capacity group of unit. The system comprises a solar photovoltaic panel and a power management module, wherein the power management module is connected with two groups of super capacitors A and B; the small-capacity super capacitor A is used for collecting electric energy supply when the communication modules in the units are powered on and connected with the network; when solar energy is supplied, charging is preferentially carried out on A. By adopting the technical scheme provided by the invention, the super capacitor A is charged preferentially, and the super capacitor A has small capacity, is quick to charge and has enough electric quantity to support the requirement of high power consumption when the communication module is networked, can support the starting of the collecting unit in a short time and enters a normal working state, thereby solving the problem that equipment cannot enter the normal working state due to frequent starting caused by high energy consumption when the solar power supply is insufficient.
Description
Technical Field
The invention relates to the field of intelligent power distribution network line state monitoring, in particular to a power supply system with double super capacitors and capacitor banks for a transient recording type fault indicator collecting unit.
Background
The intelligent power distribution network is an important link for the construction of the intelligent power grid, and faces a great difficult problem of how to quickly and accurately locate a fault section when a line fault occurs. The transient wave recording type fault indicator can accurately detect the type of the line fault and quickly locate the fault section by accurately measuring the line current and recording waves at a high speed, thereby shortening the response and processing time of the line fault and improving the power supply reliability.
The transient recording type fault indicator is used as an important component of an intelligent power distribution network and plays an important role in safe and reliable operation of the power grid. The transient recording type fault indicator is divided into a collecting unit and a collecting unit, wherein the collecting unit is responsible for remote real-time communication with a dispatching master station system, and the collecting unit is responsible for accurate measurement and high-speed recording of line current. The stable uninterrupted operation of the collection unit becomes a necessary prerequisite for the functioning of the transient recording type fault indicator.
At present, a collection unit mainly depends on a main and standby power supply system consisting of solar energy and a maintenance-free storage battery. The solar power panel is used as a main power supply, and the maintenance-free rechargeable storage battery is used as a standby power supply. Under the condition of solar power supply, the solar power panel is preferentially used for supplying power; and under the condition of insufficient solar power supply, a standby power supply is used for supplying power.
The service environment of the collecting unit has strict requirements on the performance and the service life of the storage battery, the performance of the storage battery is greatly influenced by the external environment, and the storage battery cannot be fully charged for a long time, so that the performance of the storage battery is reduced, even the storage battery is damaged and scrapped; the performance of the storage battery is reduced particularly severely under a low-temperature environment; there is also an upper limit on the number of battery charges and discharges. The normal life of the storage battery used at present is about 2 years, which is far shorter than the service life of the transient recording type fault indicator, and the storage battery needs to be replaced after reaching the service life.
The conventional power supply system cannot support the service cycle of the collecting unit, and a stable and reliable power supply system is needed.
In addition, the collecting unit has different power consumption characteristics in different operation stages, and has different output requirements on the power supply system: the collecting unit 4G communication module consumes large power during startup or networking, and requires that the storage battery can discharge in time to provide energy so as to ensure stable operation and communication of the collecting unit. Therefore, a power supply system with reliable power supply, maintenance-free, replacement-free, scientific and orderly charge and discharge control is needed to be designed.
The existing schemes mainly have two types: one scheme is to increase the size of the solar panel, improve the output power and ensure the normal starting and networking of the 4G communication module of the collecting unit. The scheme only optimizes a power supply system, reduces the degree of dependence on the storage battery, but does not completely solve the problems of performance and service life of the storage battery.
And the other scheme is to replace batteries with excellent performance and longer service life, such as lead-carbon batteries, lithium batteries and the like. This solution only optimizes the power supply, but is costly and difficult to modify and install due to the size of the collection unit cabinet and the installation location of the utility poles.
Chinese patent application CN 110277826 a discloses "a solar power supply circuit and power supply method for small load devices", which discloses a technical solution using two super capacitors, but the main purpose of using two super capacitors is to increase the storage capacity of electric energy, and use it as a power supply unit.
Disclosure of Invention
The invention aims to provide a power supply system suitable for a transient recording type fault indicator collecting unit.
In order to realize the purpose of the invention, the invention adopts the technical scheme that: a power supply system based on double super capacitor sets provides power for a transient recording type fault indicator collecting unit, and comprises a solar photovoltaic panel and a power supply management module.
The super capacitor group A is used for supplying electric energy when the communication modules in the collecting unit are powered on and are networked, and the super capacitor group B is used for supplying power to the collecting unit when the solar photovoltaic panel is insufficient in power supply.
When solar energy is supplied, the super capacitor group A is charged preferentially.
Further, a is a super capacitor, hereinafter referred to as super capacitor a.
Further, the index of the super capacitor A is determined according to the electric energy consumption when the communication modules in the collecting unit are powered on and connected with the network.
Further, after the collecting unit is powered on or reset, firstly, the following judgment is carried out:
judging the solar power supply voltage SunV, and if SunV > =15V and the duration time exceeds 10s, starting charging the super capacitor A; the collecting unit enters a working state, and the solar energy charges the super capacitor bank B on the premise of maintaining the normal operation of the collecting unit.
If SunV <15V, the two groups of super capacitors are not charged, and the collecting unit directly enters a working state.
The normal output of the photovoltaic panel is about 20V. There are three states of solar power supply:
1. the output is about 20V, the power supply is sufficient, and all functions of the collecting unit can be met.
2. The output is about 15V, the power supply is insufficient, the high-power-consumption operation cannot be supported (such as the communication module is on line), but the operation in other states of the collecting unit can be supplied.
3. The output is small, and the power supply capacity is not available.
In the working process of the convergence unit, the power consumption of the communication module (mostly 4G communication module) is relatively high in the power-on, starting-up and networking stages. If the solar power supply is insufficient at this time, the voltage of the power supply system is pulled down, so that the equipment is reset. After the communication module establishes a communication channel, the whole collection unit has no power consumption peak value and can work more stably.
According to the characteristic, two groups of super capacitors are used, so that the capacity is different, the characteristics are different, and the effect is different.
The super capacitor A adopts a small-capacity capacitor, is high in charging speed, supports short-time quick discharge, is used for electric energy supply during the startup and networking of the 4G communication module, and avoids equipment reset caused by the fact that the output of a power supply system is pulled down. In case 2 above, when the output is greater than 15V, the super capacitor a may be charged; after charging is completed, the super capacitor A supports the communication module to be on-line, and then the collection unit can run in a full-function mode.
The super capacitor group B is large in capacity, stable in output power and long in power supply time, is used for supplying power when a main power supply (solar power supply) is lost, ensures stable operation of equipment, and effectively solves the problem of performance reduction or damage after the storage battery is used for a period of time. The super capacitor is high in charging speed and short in charging time, can adapt to outdoor changeable weather conditions, and meets the requirement for reliable power supply of equipment.
By adopting the technical scheme provided by the invention, the super capacitor A is charged preferentially as long as the conditions allow, and the super capacitor A has small capacity, is quick to charge and is enough to support the high power consumption requirement when the communication module is networked, so that the starting of the collecting unit can be supported in a short time to enter a normal working state, and the problem that the equipment cannot enter the normal working state due to frequent starting caused by high energy consumption when the solar power supply is insufficient is solved; the super capacitor group B replaces a conventional storage battery, and has the advantages of miniaturization, maintenance-free property, prolonged service life of products, expanded use regions of the products and the like.
The capacity of the super capacitor A is determined according to the power consumption of the communication modules in the collecting unit during power-up and networking, so that the charging time can be reduced as much as possible on the premise of meeting the energy consumption, and the equipment can quickly enter a working state.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a block diagram of a sink unit power-up/restart phase;
fig. 3 is a block diagram during operation of the aggregating unit.
Detailed Description
Referring to fig. 1, a power supply system based on a dual super capacitor bank provides power for a transient recording type fault indicator collection unit, and includes a solar photovoltaic panel and a power management module, where the power management module is connected to two super capacitors a and B.
The electric power that solar panel provided, through power management module, accomplish the charge-discharge control to super capacitor A and super and capacitor bank B and collect the electric energy supply of unit mainboard.
The super capacitor A is specially used for supplying electric energy when the communication modules in the collecting unit are powered on and are networked, and when the solar panel is powered on, the super capacitor A is charged as long as possible no matter the output size. The capacity of the super capacitor A is determined according to the electric energy consumption amount when the communication modules in the collecting unit are powered on and connected with the network, and therefore the electric energy stored in the super capacitor A can support the power on and the network connection of the communication modules in the shortest time.
Referring to fig. 2, after the collection unit is powered on or reset, the following determination is first made:
1. and judging the solar power supply voltage SunV, and if SunV > =15V and the duration time exceeds 10s, starting charging the super capacitor A.
1.1, judging the voltage CapA _ V of the super capacitor A, and if CapA _ V > =13.4V, if the super capacitor A is fully charged, stopping charging.
1.2 if the CapA _ V is less than 13.4V and the super capacitor A is not fully charged, testing the charging current CapA _ I of the super capacitor A, and if the CapA _ I is less than 10mA and continuously exceeds 5s, the solar panel cannot charge the super capacitor and stops charging.
1.3 after the super capacitor A stops charging, the collecting unit enters a working state, and the solar energy charges the super capacitor group B on the premise of maintaining the normal operation of the collecting unit.
2. If SunV <15V, the two groups of super capacitors are not charged, and the collecting unit directly enters a working state. At the moment, the communication module is not started, and the collecting unit only has the functions of local acquisition, storage and the like and does not have the communication capacity.
And if the communication module of the collecting unit is started and connected with the network, the super capacitor A is continuously charged until the collecting unit is on line in communication.
In the invention, when the communication module is powered on, started and initialized, the power supply is provided by the super capacitor A, and the communication module in the collecting unit works only when the super capacitor A has sufficient power reserve. After the collecting unit is powered on and operated, the super capacitor A is charged firstly under the condition that the condition allows.
Referring to fig. 3, after the device enters the operating state, it is first determined whether there is power support, that is, whether the solar panel (main power source) or the super capacitor bank B is capable of supporting the operation of the device, if there is power support (at this time, the super capacitor a is charged completely), the super capacitor a is turned on to discharge, the communication module (in this embodiment, the 4G module) is dial-up networked, and the device operates in full function.
And in the operation process, if the communication is abnormal, the communication connection is reestablished.
If the power supply capacity of the solar panel (the main power supply) is sufficient, the super capacitor is charged while the equipment is maintained to operate; and if the power supply capacity is insufficient, the super capacitor bank B supplies power.
The charging process of the super capacitor bank B is as follows:
and if the communication module of the collecting unit is started and connected with the network, the super capacitor bank B is forbidden to be charged.
In the case of the aggregating unit communication module being off and on-line, the following logic is performed.
Firstly, judging the energy storage condition of a super capacitor A, and if the voltage of the super capacitor A is less than 12.5V, considering that the super capacitor A is under-voltage and needing supplementary charging; and if the voltage CapA _ V of the super capacitor A is less than 12.5V, charging the super capacitor A.
If the voltage CapA _ V > =12.5V of the super capacitor A, the electric energy stored in the super capacitor A is enough, the communication module can be supported to be started for networking, and at the moment, whether the super capacitor group B needs to be charged or not is judged: and if the voltage CapB _ V of the super capacitor bank B is less than 14.2V, starting charging the super capacitor bank B, testing the charging current CapB _ I of the super capacitor bank B, and if the CapB _ I is less than 10mA and continuously exceeds 5s, the solar panel has no capacity to charge the super capacitor, and stopping charging the super capacitor bank B.
And if the voltage CapB _ V > =14.2V of the super capacitor bank B, stopping charging the super capacitor bank B.
There is a case: the electric energy in the super capacitor A is consumed, but the super capacitor bank B has electricity. In this case, when the system is powered on or restarted, the super capacitor a is charged first according to the normal flow requirement, and then the communication module is powered on and networked, which undoubtedly delays the execution of the device. In this embodiment, if the amount of power in the super capacitor bank B is sufficient, the super capacitor bank B is used to support the power-up and networking of the communication module.
Claims (7)
1. A power supply system based on double super capacitor sets provides power for a transient recording type fault indicator collection unit, and comprises a solar photovoltaic panel and a power supply management module, wherein the power supply management module is connected with a super capacitor set (A) and a super capacitor set (B), and the super capacitor set (A) and the super capacitor set (B) complete charging and discharging under the control of the power supply management module;
the super capacitor bank (A) is used for collecting electric energy supply when the communication modules in the unit are powered on and are networked;
when solar energy is supplied, the super capacitor bank (A) is charged preferentially.
2. The power supply system according to claim 1, wherein: the super capacitor group (A) is a super capacitor.
3. The power supply system according to claim 2, wherein: and determining the index of the super capacitor bank (A) according to the electric energy consumption of the communication modules in the collecting unit during power-up and networking.
4. The power supply system according to claim 2, wherein: after the collection unit is powered on or reset, firstly, the following judgment is carried out:
judging the solar power supply voltage SunV, and if SunV > =15V and the duration time exceeds 10s, starting charging the super capacitor group (A);
the solar power supply is used for charging the super capacitor bank (B) on the premise of maintaining the normal operation of the collecting unit;
if SunV <15V, the two groups of super capacitors are not charged, and the collecting unit directly enters a working state.
5. The power supply system according to claim 4, wherein: the charging process of the super capacitor bank (A) comprises the following steps:
judging the voltage CapA _ V of the super capacitor bank (A),
if the CapA _ V > =13.4V and the super capacitor bank (A) is fully charged, stopping charging;
if the CapA _ V is less than 13.4V and the super capacitor bank (A) is not fully charged, testing the charging current CapA _ I of the super capacitor bank (A), and if the CapA _ I is less than 10mA and continuously exceeds 5s, stopping charging;
and if the communication module of the collecting unit is started and connected with the network, the super capacitor bank (A) is continuously charged until the collecting unit is on line in communication.
6. The power supply system according to claim 4, wherein: the charging process of the super capacitor bank (B) comprises the following steps:
if the collecting unit communication module is started and connected with the network, the super capacitor bank (B) is forbidden to be charged;
under the condition that the convergence unit communication module is not started and is connected with the network, the following logic is executed:
if the voltage CapA _ V of the super capacitor bank (A) is less than 12.5V, charging the super capacitor bank (A);
if the voltage CapA _ V > =12.5V of the super capacitor bank (A) and the voltage CapB _ V of the super capacitor bank (B) is less than 14.2V, starting charging of the super capacitor bank (B), testing the charging current CapB _ I of the super capacitor bank (B), and stopping charging of the super capacitor bank (B) if CapB _ I is less than 10mA and continuously exceeds 5 s;
and if the voltage of the super capacitor bank (B) CapB _ V > =14.2V, stopping charging the super capacitor bank (B).
7. The power supply system according to any one of claims 1 to 6, wherein: when the communication module in the collecting unit is powered on and networked, if the super capacitor bank (A) is electrified, the super capacitor bank (A) is used for supplying power; otherwise, if the super capacitor bank (B) is charged, the super capacitor bank (B) is used for supplying power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011342436.0A CN112436586A (en) | 2020-11-26 | 2020-11-26 | Power supply system based on double super capacitor sets |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011342436.0A CN112436586A (en) | 2020-11-26 | 2020-11-26 | Power supply system based on double super capacitor sets |
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| CN112436586A true CN112436586A (en) | 2021-03-02 |
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| CN202011342436.0A Pending CN112436586A (en) | 2020-11-26 | 2020-11-26 | Power supply system based on double super capacitor sets |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115954949A (en) * | 2023-03-14 | 2023-04-11 | 合肥开关厂有限公司 | Control method of photoelectric storage integrated intelligent access system |
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| CN111864888A (en) * | 2020-07-22 | 2020-10-30 | 石家庄科林电气股份有限公司 | Method for automatically adjusting operation mode |
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2020
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Patent Citations (6)
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| CN103501024A (en) * | 2013-09-09 | 2014-01-08 | 珠海许继电气有限公司 | Power source system based on combination of aluminum electrolytic capacitor and ultra-capacitor |
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