CN113506922A - Online maintenance device and maintenance method for lead-acid storage battery for transformer substation - Google Patents
Online maintenance device and maintenance method for lead-acid storage battery for transformer substation Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4242—Regeneration of electrolyte or reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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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
- H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to an online maintenance device of a lead-acid storage battery for a transformer substation, which comprises an MCU (microprogrammed control unit), a detection module, a key, a screen, a plurality of input and output interfaces, wherein the detection module measures voltage, current and temperature signals of the battery and transmits the voltage, current and temperature signals to the MCU; the screen displays the parameters to be set and the real-time state parameters of the battery; the key realizes starting, closing and parameter setting; the MCU controls the working mode of the main circuit by applying signals to the driving module, and different repairing modes are realized. The method can realize the single bridge off-line repair of the degraded battery, the whole group of storage batteries operates on line, the discharge capacity of the storage battery pack is not influenced in the repair process, and the storage battery pack can be immediately put into operation when the transformer substation loses alternating current and power.
Description
Technical Field
The invention belongs to the field of batteries, relates to a battery online maintenance technology, and particularly relates to an online maintenance device and an online maintenance method for a lead-acid storage battery for a transformer substation.
Background
As is known, the storage battery pack of the dc system of the substation in China generally adopts lead-acid batteries for series combination, the poor performance of any battery can cause the efficiency of the whole system to be reduced, when a part of monomers in the storage battery pack are degraded, the monomers cannot be found and intervened in time, the long-term overcharge and undercharge of the monomers can be caused, the degradation is accelerated, and finally, the monomers can only be replaced in a whole group, so that the operation cost of an enterprise is increased. Therefore, it is necessary to repair the lagging cells to prolong the life of the whole battery pack. However, at present, the whole group of storage batteries need to be removed from operation for repairing the storage batteries, and the laggard monomers are put into a laboratory for repairing. The whole battery group is withdrawn from operation, so that the accident potential of the transformer substation is greatly increased, and meanwhile, the workload and the time cost of primary operation and maintenance personnel are increased due to the backward disassembly, assembly and transportation work of the storage battery.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the on-line maintenance device and the on-line maintenance method for the lead-acid storage battery of the direct-current power supply of the transformer substation, which have the advantages of simple structure, complete functions and convenience in use.
The technical scheme adopted by the invention for solving the technical problem is as follows:
an on-line maintenance device of a lead-acid storage battery for a transformer substation comprises an MCU, a detection module, a drive module, a key, a screen and a plurality of input and output interfaces,
the detection module measures voltage, current and temperature signals of the battery and transmits the signals to the MCU;
the screen displays the parameters to be set and the real-time state parameters of the battery;
the key realizes starting, closing and parameter setting;
the MCU controls the working mode of the main circuit by applying signals to the driving module, so that different repairing modes are realized;
the main circuit comprises an online identification and switching circuit, the online identification and switching circuit comprises an online switching unit and a discharge switching unit, the online switching unit consists of a diode and an MOS (metal oxide semiconductor) tube, the normal discharge of the storage battery pack after the single battery is separated is ensured through the diode, and the MOS tube is controlled to be conducted after the battery is separated so that the storage battery pack can be charged normally; the discharge switching unit includes an activation device including a pulse repair line.
The pulse repair circuit comprises an MOS transistor Q1, an MOS transistor Q2 and a resistor R, the drive module controls the on-off of the MOS transistor Q1 and the MOS transistor Q2, and when the MOS transistor Q1 is switched on, the MOS transistor Q2 is switched off, and the battery is in a charging state; when the MOS transistor Q2 is switched on, the MOS transistor Q1 is switched off, the battery is in a discharge state, and different activation modes are realized by controlling the on-off of the MOS transistor Q1 and the MOS transistor Q2 and adjusting the switching frequency and the duty ratio at the same time.
And the input and output interfaces include X _ in, X _ out, K _ in, K _ out, F _ out,
the crocodile clip is provided with a voltage sensing device which can detect the voltage of the storage battery in real time;
k _ in and K _ out are used for carrying out on-line switching work on the battery, so that the battery is separated from the battery pack and is connected with two ends of a battery adjacent to the battery to be repaired, and at the moment, the battery to be maintained is short-circuited through an internal circuit of the maintenance device and falls off from the storage battery pack;
f _ out is used for realizing discharge switching work, when the battery is in repair and the battery pack is discharged, the repair is immediately stopped, and the battery is connected back to the battery pack through X _ in and F _ out.
The invention also provides a maintenance method of the on-line maintenance device of the lead-acid storage battery for the transformer substation, which comprises the steps of firstly detecting whether the current battery is in an on-line working state, if so, starting the on-line switching unit, then setting parameters by a user, and judging whether to start a rapid activation mode according to the parameters; the quick activation mode is a high-frequency pulse repair mode, the voltage, current and temperature parameters of the battery are monitored, if the temperature rise exceeds a rated value, the duty ratio is reduced to inhibit the temperature rise, and when the current is lower than 2A, the activation is finished.
And a high-frequency pulse repairing mode can be replaced by a variable amplitude variable frequency composite pulse repairing mode.
The invention has the advantages and positive effects that:
1. the invention can carry out the online maintenance work of the deteriorated lead-acid storage battery in the storage battery chamber and the main control chamber without dismounting and bringing back the storage battery, thereby saving the cost of manpower, time, transportation and the like.
2. The method can realize the single bridge off-line repair of the degraded battery, the whole group of storage batteries operates on line, the discharge capacity of the storage battery pack is not influenced in the repair process, and the storage battery pack can be immediately put into operation when the transformer substation loses alternating current and power.
3. The device is small and portable, is easy to operate, has an intelligent maintenance method, and does not have potential safety hazards.
Drawings
FIG. 1 is a schematic diagram of an online maintenance device for a lead-acid battery.
In the figure: 1 is a maintenance device body; 2 is input and output interface; 3 is a lead; 4 is a crocodile clip; and 5 is a storage battery.
FIG. 2 is a schematic diagram of a control module of the lead-acid battery online maintenance device.
FIG. 3 is a schematic diagram of an online identification and switching circuit.
Fig. 4 is a schematic diagram of a pulse repair circuit.
FIG. 5 is a maintenance flow chart of the lead-acid battery online maintenance device.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
As shown in figure 1, a maintenance device body 1 comprises a plurality of input and output interfaces 2, wherein the input and output interfaces 2 are connected with one ends of leads 3, the other ends of the leads 3 are connected with crocodile clips 4, and the crocodile clips 4 are connected with storage batteries 5.
The maintenance device body control module is shown in fig. 2: the main control chip MCU controls the detection module, the driving module, the key module and the LCD screen at the same time. The detection module measures the voltage, current and temperature signals of the battery and transmits the signals to the MCU. The LCD screen displays the parameters to be set and the real-time state parameters of the battery. The key module realizes the functions of starting, closing and parameter setting. The MCU controls the working mode of the main circuit by applying signals to the driving module, and different repairing modes are realized. The driving module can be a transistor module, a thyristor (silicon controlled) module and an IGBT module.
The main circuit comprises an online identification and switching circuit, and the online identification and switching circuit is shown in fig. 3: the on-line switching circuit comprises an on-line switching unit and a discharging switching unit, wherein the on-line switching unit ensures that the storage battery pack operates on line and the single battery pack is separated, so that the normal work of the storage battery pack is not influenced when the storage battery pack is separated, and the safe discharging of the storage battery pack is ensured to ensure the continuity of bus voltage. Meanwhile, by detecting the current of the circuit, after the battery is separated, the MOS tube is controlled to be conducted, so that the storage battery pack can be charged normally. The discharging switching unit is used for stopping the repairing work by the discharging switching unit when the battery is in the repairing process and the storage battery pack needs to be discharged, and the single battery is separated from the storage battery pack, so that the storage battery pack is possibly unstable in voltage or insufficient in power in the discharging process, and meanwhile, the single battery is reconnected into the storage battery pack to be discharged together, so that the power supply safety is ensured, and the safety accident is avoided.
The discharge switching unit includes an activation device including a pulse repair line as shown in fig. 4: the drive module controls the on-off of the MOS transistor Q1 and the MOS transistor Q2, when the MOS transistor Q1 is switched on, the MOS transistor Q2 is switched off, and the battery is in a charging state; when the MOS transistor Q2 is turned on, the MOS transistor Q1 is turned off, and the battery is in a discharge state. By controlling the on-off of the MOS transistor Q1 and the MOS transistor Q2, the switching frequency and the duty ratio are adjusted at the same time, and different activation modes are realized.
The pulse repair process of the on-line maintenance device for the lead-acid storage battery of the direct-current power supply of the transformer substation is shown in the figure 5: the whole process can be divided into three parts, firstly, whether the current battery is in an online working state is detected, if so, an online switching unit (as shown in fig. 3) is started, then, a user sets parameters by himself, and whether a rapid activation mode is started or not is judged according to the parameters. The quick activation mode is a high-frequency pulse repair mode, the voltage, current and temperature parameters of the battery are monitored, if the temperature rise exceeds a rated value, the duty ratio is reduced to inhibit the temperature rise, and when the current is lower than 2A, the activation is finished. On the basis of high-frequency pulse, factors such as internal reaction and temperature rise of the battery are considered, negative pulse is added to reduce the temperature rise and inhibit the generation of sulfate crystals, the purpose of amplitude variation is to reduce the loss of water in the storage battery, and the frequency variation is to achieve a resonance effect with different sulfate crystals.
The online maintenance method can ensure that the storage battery pack repairs the degraded monomer on line, and the degraded monomer does not need to be shifted and brought back.
The intelligent maintenance device can realize the functions of on-line switching, discharging switching, pulse activation, nuclear capacity discharging and the like, thereby recovering the capacity of the aged battery to a certain extent and prolonging the service life of the aged battery.
The input and output interface 2 comprises X _ in, X _ out, K _ in, K _ out and F _ out. The crocodile clip is provided with a voltage sensing device, so that the voltage of the storage battery can be detected in real time, and the sampling frequency can be as low as 1 s; k _ in and K _ out are used for carrying out on-line switching work on the battery, so that the battery is separated from the battery pack and is required to be connected with two ends of a battery adjacent to the battery to be repaired, at the moment, the maintained battery is short-circuited through an internal circuit of the intelligent maintenance device and falls off from the storage battery pack, and the battery is conveniently switched: f _ out is used for realizing discharge switching work, when the battery is repaired and the battery pack discharges, the repair is immediately stopped, the battery is connected back to the battery pack through X _ in and F _ out to ensure power supply safety, and the F _ out and the K _ out can share an outgoing line and a clamp or can be independently wired and connected to the clamp.
The specific implementation process is as follows:
(1) respectively connecting 5 ports of the intelligent maintenance device to corresponding interfaces;
(2) the intelligent maintenance device detects whether the battery is in an online state by accessing a floating charging current signal (or a charger output signal) of the storage battery pack and the voltage of the storage battery terminal, starts online switching if the battery is in the online state, short-circuits the battery to be maintained through an alligator clip bridged on the adjacent battery and a circuit (shown in figure 3) in the maintenance device, and manually disconnects the negative terminal of the single battery to separate the storage battery from the battery pack;
(3) when the battery is separated from the battery pack, the composite pulse repair of the battery can be started (as shown in fig. 4 and 5), and meanwhile, in the repair process, if the battery pack has a discharge working condition, the intelligent maintenance device can immediately stop the repair work and connect the battery back to the battery pack, so that the power supply safety of the direct-current bus is ensured;
(4) after the battery is repaired, the battery can be subjected to capacity discharge, and the repairing effect is verified by matching with the floating charge voltage and internal resistance data before and after repairing, so that the next corresponding processing work is determined.
Example 1
After the capacity of the whole battery pack of a certain 220kV transformer substation is checked, the single battery capacity of the No. 13 battery is only 5% of the rated capacity, the capacity of other batteries except the battery is over 90%, and the whole battery pack needs to be retired according to the regulation of the operation specification. The battery is maintained on line, so that the service life of the whole battery pack is prolonged, and the waste of the storage battery is reduced.
(1) Respectively connecting 5 ports of the intelligent maintenance device to corresponding interfaces;
(2) the intelligent maintenance device detects that the battery is in an online state by accessing a float charge current signal 0.06A of the storage battery pack and a voltage 2.19V of the storage battery terminal, starts online switching, short-circuits the battery to be maintained by a circuit bridged between an alligator clip of a similar battery and the internal part of the maintenance device, simultaneously manually pulls out a single battery cathode column bolt, removes a copper wire from a cathode, and separates the storage battery from the battery pack;
(3) when the battery is separated from the battery pack, the battery is not suitable for quick repair due to extremely low capacity, and the amplitude-variable frequency pulse repair is carried out on the battery;
(4) after the battery is repaired, carrying out nuclear capacity discharge on the battery, finding that the capacity is increased to 90% of the rated capacity, after the battery is connected to a series circuit, increasing the float charge voltage to 2.24V, and reducing the internal resistance from 1.23 m omega before repair to 0.92 m omega; after the repeated repair is carried out again, the capacity is increased to 97 percent of the rated capacity, the float charging voltage is increased to 2.24V, the internal resistance is reduced to 0.73 m omega, the consistency of the battery and other storage batteries in the battery pack is considered to be better, and the repair is finished.
Example 2
After a certain 110kV transformer substation is subjected to once-a-year internal resistance test, the internal resistance of a No. 73 battery is 0.93m omega and exceeds the average value of the whole battery pack by 1.5 times, and the battery is subjected to online maintenance so as to prolong the service life of the whole battery pack and reduce the waste of storage batteries.
(1) Respectively connecting 5 ports of the intelligent maintenance device to corresponding interfaces;
(2) the intelligent maintenance device detects that the battery is in an online state by accessing a working signal of a charger and 2.33V of the terminal voltage of the storage battery, starts online switching, short-circuits the battery to be maintained by a circuit bridged between an alligator clip of a similar battery and the inside of the maintenance device, simultaneously manually loosens and pulls out a single battery cathode column bolt, removes a copper wire from a cathode, and separates the storage battery from a battery pack;
(3) when the battery is separated from the battery pack, the battery is subjected to high-frequency pulse repair after a preliminary decision is made for quick repair because the internal resistance of the battery is higher;
(4) after the battery is repaired, the battery is subjected to nuclear capacity discharge, the capacity is found to be 92% of the rated capacity, after the battery is connected to the series circuit, the float voltage is reduced to 2.27V, the internal resistance is reduced to 0.69 m omega from 0.93m omega before the repair, the consistency of the battery and other storage batteries in the battery pack is considered to be good, and the repair is completed.
Example 3
After a certain 35kV transformer substation is subjected to once-a-month voltage test, the float charging voltage of the No. 54 battery is 2.20 and exceeds the average value of the whole battery pack by 30mV, and the battery is subjected to online maintenance so as to prolong the service life of the whole battery pack and reduce the waste of storage batteries.
(1) Respectively connecting 5 ports of the intelligent maintenance device to corresponding interfaces;
(2) the intelligent maintenance device detects that the battery is in an online state by accessing a working signal of a charger and 2.20V of the terminal voltage of the storage battery, starts online switching, short-circuits the battery to be maintained by a circuit bridged between an alligator clip of a similar battery and the inside of the maintenance device, simultaneously manually loosens and pulls out a single battery cathode column bolt, removes a copper wire from a cathode, and separates the storage battery from a battery pack;
(3) when the battery is separated from the battery pack, the internal resistance is not obviously abnormal due to low float charge voltage of the battery, the quick repair is carried out by preliminary decision, and the high-frequency pulse repair is carried out on the battery;
(4) after the battery is repaired and the series circuit is connected, the float charging voltage is increased to 2.23V, the internal resistance is reduced to 0.58 m omega from 0.67m omega before the repair, the consistency of the battery and other storage batteries in the battery pack is considered to be better, and the repair is completed.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept, and these changes and modifications are all within the scope of the present invention.
Claims (5)
1. The utility model provides a device is maintained on line to lead acid battery for transformer substation which characterized in that: comprises an MCU, a detection module, a drive module, a key, a screen, a plurality of input and output interfaces,
the detection module measures voltage, current and temperature signals of the battery and transmits the signals to the MCU;
the screen displays the parameters to be set and the real-time state parameters of the battery;
the key realizes starting, closing and parameter setting;
the MCU controls the working mode of the main circuit by applying signals to the driving module, so that different repairing modes are realized;
the main circuit comprises an online identification and switching circuit, the online identification and switching circuit comprises an online switching unit and a discharge switching unit, the online switching unit consists of a diode and an MOS (metal oxide semiconductor) tube, the normal discharge of the storage battery pack after the single battery is separated is ensured through the diode, and the MOS tube is controlled to be conducted after the battery is separated so that the storage battery pack can be charged normally; the discharge switching unit includes an activation device including a pulse repair line.
2. The online maintenance device of the lead-acid storage battery for the transformer substation of claim 1, characterized in that: the pulse repair circuit comprises an MOS transistor Q1, an MOS transistor Q2 and a resistor R, the drive module controls the on-off of the MOS transistor Q1 and the MOS transistor Q2, and when the MOS transistor Q1 is switched on, the MOS transistor Q2 is switched off, and the battery is in a charging state; when the MOS transistor Q2 is switched on, the MOS transistor Q1 is switched off, the battery is in a discharge state, and different activation modes are realized by controlling the on-off of the MOS transistor Q1 and the MOS transistor Q2 and adjusting the switching frequency and the duty ratio at the same time.
3. The online maintenance device of the lead-acid storage battery for the transformer substation of claim 1, characterized in that: the input and output interfaces comprise X _ in, X _ out, K _ in, K _ out and F _ out,
the crocodile clip is provided with a voltage sensing device which can detect the voltage of the storage battery in real time;
k _ in and K _ out are used for carrying out on-line switching work on the battery, so that the battery is separated from the battery pack and is connected with two ends of a battery adjacent to the battery to be repaired, and at the moment, the battery to be maintained is short-circuited through an internal circuit of the maintenance device and falls off from the storage battery pack;
f _ out is used for realizing discharge switching work, when the battery is in repair and the battery pack is discharged, the repair is immediately stopped, and the battery is connected back to the battery pack through X _ in and F _ out.
4. The maintenance method of the online maintenance device for the lead-acid storage battery of the substation according to claim 1, characterized by comprising the steps of: firstly, detecting whether a current battery is in an online working state, if so, starting an online switching unit, then setting parameters by a user, and judging whether a rapid activation mode is started or not according to the parameters; the quick activation mode is a high-frequency pulse repair mode, the voltage, current and temperature parameters of the battery are monitored, if the temperature rise exceeds a rated value, the duty ratio is reduced to inhibit the temperature rise, and when the current is lower than 2A, the activation is finished.
5. The maintenance method of the online maintenance device of the lead-acid storage battery for the substation according to claim 4, characterized in that: and replacing the high-frequency pulse repairing mode by a variable amplitude variable frequency composite pulse repairing mode.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114122595A (en) * | 2021-11-02 | 2022-03-01 | 国网湖北省电力有限公司宜昌供电公司 | Installation, replacement and maintenance method for storage battery module of direct current system of transformer substation |
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| CN112332469A (en) * | 2020-09-08 | 2021-02-05 | 煤炭科学技术研究院有限公司 | Balancing module and balancing method for power supply of mining lithium ion storage battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5923148A (en) * | 1996-02-01 | 1999-07-13 | Aims System, Inc. | On-line battery monitoring system with defective cell detection capability |
| CN201681960U (en) * | 2010-05-14 | 2010-12-22 | 临沂巨皇新能源科技发展有限公司 | Streetlamp controller photovoltaic cell repair device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114122595A (en) * | 2021-11-02 | 2022-03-01 | 国网湖北省电力有限公司宜昌供电公司 | Installation, replacement and maintenance method for storage battery module of direct current system of transformer substation |
| CN114122595B (en) * | 2021-11-02 | 2023-06-02 | 国网湖北省电力有限公司宜昌供电公司 | Method for installing, replacing and maintaining storage battery module of direct-current system of transformer substation |
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| CN113506922B (en) | 2021-11-19 |
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