CN111509310A - Method and device for online testing performance of storage battery of direct current system of transformer substation - Google Patents
Method and device for online testing performance of storage battery of direct current system of transformer substation Download PDFInfo
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- CN111509310A CN111509310A CN202010216465.6A CN202010216465A CN111509310A CN 111509310 A CN111509310 A CN 111509310A CN 202010216465 A CN202010216465 A CN 202010216465A CN 111509310 A CN111509310 A CN 111509310A
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- 238000012360 testing method Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 26
- 239000010703 silicon Substances 0.000 claims abstract description 26
- 238000007599 discharging Methods 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 102220602178 Synaptotagmin-3_L50A_mutation Human genes 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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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
- H01M10/4285—Testing apparatus
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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
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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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
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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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 online testing device comprises a silicon stack D1, a direct current contactor K1, a first voltage sensor TV1, a second voltage sensor TV2, a current sensor TA1, a wiring terminal CD +, M-and a CPU. The method properly reduces the direct current output voltage of a bus on the charger, and utilizes the field load to carry out rapid discharge test on the storage battery pack so as to rapidly verify the performance of the storage battery pack and evaluate the state of the storage battery. The invention can be manually or automatically started regularly to quickly and conveniently check the performance of the storage battery, and timely find the conditions of single battery open circuit, battery pack switch failure or disconnection, battery pack fuse, connecting wire falling, cross-layer wire disconnection, screw loosening and the like; the online detection of the performance of the storage battery can be realized, and the defect of the blank window period of the checking discharge test is effectively overcome.
Description
Technical Field
The invention relates to a method and a device for testing the performance of a storage battery of a direct current system of a transformer substation on line, belonging to the technical field of transformer substations.
Background
The direct-current power supply system is a basic power supply of a transformer substation, is an essential system and equipment for ensuring the actions of a protection device and automation equipment, switching on and off, preventing the expansion of accidents and recovering the normal operation of the system, and the safe and stable operation of the direct-current power supply system is a key for ensuring the safe and stable operation of a power system. The storage battery is used as a core device of direct current, but problems occur, and the following problems are that the protection fails, the switch fails to work, and the channel is interrupted ….
At present, aiming at the performance test of the power storage battery, voltage on-line detection and a periodic check discharge test are mainly used, the voltage detection only can reflect the voltage and cannot represent the performance of the battery, the check discharge test can accurately measure the actual capacity of the battery, but the discharge test can only be performed periodically and cannot reflect the change of the performance of the storage battery in real time. And the failure of the verifiable discharge test to be a hundred percent ensures that cells in the battery pack that are about to open "false breaks" can be timely discovered. The battery with the 'virtual break' can be found only by simulating a real load current impact process of supplying power to the direct current load by the storage battery in an instant seamless manner under the condition that the charger stops running.
Disclosure of Invention
The invention aims to provide a method and a device for testing the performance of a storage battery of a direct current system of a transformer substation on line, aiming at the problem that the prior art cannot reflect the change of the performance of the storage battery in real time and ensuring the safe and stable operation of a power system.
The technical scheme includes that the online testing device for the performance of the storage battery of the direct current system of the transformer substation comprises a silicon stack D1, a direct current contactor K1, a first voltage sensor TV1, a second voltage sensor TV2, a current sensor TA1, a wiring terminal CD +, M-and a CPU; the silicon stack and the direct current contactor; one end of a main loop of the direct current contactor is connected with a wiring terminal CD +, and the other end of the main loop of the direct current contactor is connected with a wiring terminal M + through a current sensor; two ends of the direct current contactor coil are respectively connected with an I/O interface of the CPU; the current sensor is connected with an A/D interface of the CPU; the first voltage sensor and the second voltage sensor are respectively connected with an A/D interface of the CPU; the first voltage sensor is respectively connected with the connecting terminals CD + and M +; the second voltage sensor is respectively connected with a connecting terminal M + and a connecting terminal M-.
The CPU adopts a singlechip with the highest configuration of 8-bit series of microprocessors Atmega128 and ATME L company, an advanced RISC structure, an on-chip F L ASH of 128K, an SRAM of 4K, an A/D converter of 10 bits of 8 channels and two programmable serial USARTs.
When the online testing device is used for online testing of the performance of the storage battery, the online testing device and a direct current system wiring circuit are as follows:
the direct current bus is provided with a conventional direct current load, wherein a direct current positive bus + KM is connected with the positive electrode of the storage battery pack, and a negative bus-KM is connected with the negative electrode of the storage battery and the direct current output minus end of the charger; the CD + end of the online testing device is connected with the + end of the direct current output of the charger, the M + end is connected with the direct current positive bus + KM, and the M-end is connected with the direct current negative bus-KM; the A end of the silicon stack D1 of the online testing device is connected with the CD + of the online testing device; one end of a main contact of the direct current contactor K1 and the positive input end of the first voltage sensor TV1 are connected in parallel to the CD + end of the online testing device, and the other end of the main contact of the direct current contactor K1, the negative input end of the first voltage sensor TV1 and the K end of the silicon stack D1 are connected in parallel to pass through the current sensor TA and be connected to the M + end of the online testing device; the negative input end of a second voltage sensor TV2 of the online testing device is connected with M-, and the positive input end of the second voltage sensor TV2 of the online testing device is connected with the negative input end of a first voltage sensor TV 1; two ends of a coil of the direct current contactor K1 are connected with an I/O port of the CPU, and secondary output ends of the first voltage sensor TV1, the second voltage transformer TV2 and the current sensor TA1 are connected with an A/D port of the CPU.
The method is used for properly reducing the direct current output voltage of a bus on a charger, and performing rapid discharge test on a storage battery pack by using a field load so as to rapidly verify the performance of the storage battery pack and evaluate the state of the storage battery.
The method comprises the following steps:
(1) before testing the performance of the storage battery pack, a main contact of a direct current contactor K1 of the online testing device is in a closed state, a silicon stack D1 is short-circuited and does not work, the voltage of a charger and the voltage of a direct current bus are checked through voltage sensors TV1 and TV2, whether the running condition of a direct current system is normal or not is judged, and the next step of operation is carried out after the normal running condition is confirmed;
(2) starting a test, driving a coil of a direct current contactor K1 by a CPU (Central processing Unit) of the on-line test device through an I/O (input/output) port to enable a main contact K1 to be in a disconnected state, putting a silicon stack D1 into operation, and reducing the direct current output voltage of a bus on a charger, so that a storage battery bears the direct current conventional load for a station and is in a discharging state;
(3) monitoring the discharging process, wherein in the discharging process, a CPU (central processing unit) of the online testing device collects the voltages of a charger and a direct-current bus through an A/D (analog/digital) port through a first voltage sensor TV1 and a second voltage sensor TV2, the output of the direct-current voltage and the direct-current bus voltage of the charger are monitored in real time online, once the output of the charger or a storage battery pack is abnormal, the discharging is immediately finished, and the normal running state is recovered;
(4) finishing discharging, when the set discharging time is up, driving and controlling a coil of a direct current contactor K1 by a CPU (Central processing Unit) of the online testing device through an I/O (input/output) port to enable a main contact K1 to be in a closed state, and then short-circuiting a silicon stack D1, wherein a charger automatically supplies power to a direct current load for a conventional station and charges a storage battery pack, and a direct current power supply system restores to a normal operation mode;
(5) when the discharging is finished, the CPU of the online testing device collects the voltage of the direct current bus through the A/D port through the voltage sensor TV2, if the voltage of the direct current bus is higher than a fixed value, the performance of the storage battery pack is basically good, and the actual requirement of a transformer substation is met; if the voltage of the direct current bus is lower than a fixed value, the capacity of the storage battery pack is insufficient, the performance of the storage battery is obviously reduced, and the fact that a standard discharge capacity check test is required to be carried out as soon as possible is prompted to be accurately verified.
The working principle of the invention is that the invention properly reduces the direct current output voltage of the bus on the charger based on the one-way conduction and automatic voltage reduction characteristics of the silicon stack, and utilizes the field load to carry out the rapid discharge test on the storage battery so as to rapidly verify the performance of the storage battery and evaluate the state of the storage battery.
The direct-current power supply system of the transformer substation mainly comprises a charger, a storage battery pack, a direct-current bus, a direct-current load and the like, wherein the charger is connected with the storage battery pack in parallel, and the direct-current load is supplied with power through the direct-current bus. The online testing method for the performance of the storage battery of the direct current system of the transformer substation is characterized in that an online testing device comprising a silicon stack, a direct current contactor and a control circuit is additionally arranged between the output positive electrode of a charger and a direct current bus so as to realize online detection of the performance of the storage battery.
The method has the advantages that when the performance of the storage battery is detected, the method can be manually or automatically started regularly to quickly and conveniently detect the performance of the storage battery, timely find the conditions of single battery open circuit, battery pack switch failure or disconnection, battery pack fuse fusing, connecting line falling, cross-layer line disconnection, screw loosening and the like, verify whether the system can bear normal load, and ensure the running safety of a direct current system; the online detection of the performance of the storage battery can be realized, and the defect of the blank window period of the checking discharge test is effectively overcome.
The invention also has the function of desulfurizing the storage battery: because the backup storage battery is in online float charge for a long time, the storage battery pack has no discharge chance when the alternating current is not cut off at ordinary times, and the pole plates are easy to generate a vulcanization phenomenon, so that the problems of internal resistance increase, capacity reduction, service life shortening and even open circuit of the storage battery are caused. After the online testing device is added, the storage battery pack regularly performs shallow discharge at ordinary times, and can play a certain role in inhibiting vulcanization.
Drawings
FIG. 1 is a functional block diagram of the apparatus of the present invention;
FIG. 2 is a schematic diagram of the wiring circuit of the on-line monitoring device and the DC system according to the present invention.
Detailed Description
Fig. 2 shows an online testing device for the performance of a storage battery of a dc system of a substation and a wiring circuit connected to the dc system.
The direct-current power supply system of the transformer substation mainly comprises a charger, a storage battery pack, a direct-current bus, a direct-current load and the like, wherein the charger is connected with the storage battery pack in parallel, and the direct-current load is supplied with power through the direct-current bus. The online testing method for the performance of the storage battery of the direct current system of the transformer substation is characterized in that an online testing device comprising a silicon stack, a direct current contactor and a control circuit is additionally arranged between the output positive electrode of a charger and a direct current bus so as to realize online detection of the performance of the storage battery.
The online testing device of the embodiment comprises a silicon stack D1, a direct current contactor K1, a first voltage sensor TV1, a second voltage sensor TV2, a current sensor TA1, a wiring terminal CD +, M-, a CPU and the like.
The silicon stack model is 2CW L50A/35V, and has two working modes of automatic operation and manual operation.
The direct current contactor is an SEV500AH high-voltage direct current contactor, rated voltage of 320V and rated current of 500A.
The voltage sensors all adopt electromagnetic modulation voltage sensors, and the models are as follows: WPE-DV with input of 0-300V and output of 0-5V.
The current sensor adopts a Hall current sensor, and the model is as follows: TBC 50A.
The connecting terminal adopts phi 10 red and black standard connecting terminals.
The CPU adopts a singlechip with 8-bit series highest configuration of a microprocessor Atmega128 and ATME L company, an advanced RISC structure, an F L ASH in a 128K chip, an SRAM in a 4K chip, an A/D converter with 10 bits of 8 channels and two programmable serial USARTs, and the function modules of the device are shown in figure 1.
The CPU is connected in a wiring mode as follows: the A/D interface 1 is connected with a secondary output end of a voltage sensor TV1 and samples the output voltage of the charger, the A/D interface 2 is connected with a secondary output end of a voltage sensor TV2 and samples the voltage of a direct current bus, and the A/D interface 3 is connected with a secondary output end of a current sensor TA1 and samples the output current of the charger; the I/O interface drives a direct current contactor K1, and the change of bus voltage on the charger is realized by combining a silicon stack D1, the UART1 is used as a communication port for local debugging or uploading at a scheduling end or connecting with other intelligent communication devices, and the UART2 is used as a touch screen interface for man-machine interaction.
As shown in FIG. 2, the DC bus has a normal DC load, wherein the positive DC bus + KM is connected to the positive pole of the battery pack, the negative bus-KM is connected to the negative pole of the battery and the "-" end of the DC output of the charger, the CD + end of the online testing device is connected to the "+" end of the DC output of the charger, the M + end is connected to the positive DC bus + KM, and the M-end is connected to the negative DC bus-KM. The A end of a silicon stack D1 of the online testing device is connected with a CD + of the online testing device, one end of a main contact of a direct current contactor K1 and the positive input end of a voltage sensor TV1 are connected in parallel with the CD + end of the online testing device, and the other end of the main contact of the direct current contactor K1, the negative input end of the voltage sensor TV1 and the K end of a silicon stack D1 are connected in parallel, penetrate through a current sensor TA and are connected with the M + end of the online testing device; the negative input end of a voltage sensor TV2 of the online testing device is connected with M-, and the positive input end of the voltage sensor TV1 is connected with the negative input end of the voltage sensor TV 2; two ends of a coil of the direct current contactor K1 are connected with an I/O port of the CPU, and secondary output ends of a voltage sensor TV1 and a TV2 current sensor TA1 are connected with an A/D port of the CPU.
The online testing method for the performance of the storage battery of the direct current system of the transformer substation comprises the following steps:
a. before testing the performance of the storage battery pack, a main contact of a direct current contactor K1 of the online testing device is in a closed state, a silicon stack D1 is short-circuited and does not work, the voltage of a charger and the voltage of a direct current bus are checked through voltage sensors TV1 and TV2, whether the running condition of the direct current system is normal or not is judged, and the next operation can be carried out after the normal running condition is confirmed.
b. Starting a test:
the on-line testing device CPU drives a coil of a direct current contactor K1 through an I/O port, so that a main contact K1 is in a disconnected state, a silicon stack D1 is put into operation, and the direct current output voltage of a bus on a charger is reduced, so that a storage battery bears the direct current conventional load for a station and is in a discharging state.
c. Monitoring of discharge processes
In the discharging process, the CPU of the online testing device collects the voltages of the charger and the direct current bus through the A/D ports through the voltage sensors TV1 and TV2, the direct current voltage and the direct current bus voltage output by the charger are monitored in real time online, once the charger or the storage battery pack outputs abnormity, the discharging is immediately finished, and the normal running state is recovered.
d. End of discharge
When the set discharge time is up, the CPU of the on-line testing device drives and controls a coil of a direct current contactor K1 through an I/O port to enable a main contact K1 to be in a closed state, a silicon stack D1 is in short circuit, the charger automatically supplies power to a direct current load used in a conventional station and charges a storage battery pack, and a direct current power supply system restores to a normal operation mode.
e. Judgment of test results
When the discharging is finished, the CPU of the online testing device collects the voltage of the direct current bus through the A/D port through the voltage sensor TV2, if the voltage of the direct current bus is higher than a fixed value, the performance of the storage battery pack is basically good, and the actual requirement of a transformer substation can be met; if the voltage of the direct current bus is lower than a fixed value, the capacity of the storage battery pack is insufficient, the performance of the storage battery is obviously reduced, and the fact that a standard discharge capacity check test is required to be carried out as soon as possible is prompted to be accurately verified.
Claims (4)
1. The online testing device for the performance of the storage battery of the direct-current system of the transformer substation is characterized by comprising a silicon stack D1, a direct-current contactor K1, a first voltage sensor TV1, a second voltage sensor TV2, a current sensor TA1, a wiring terminal CD +, M & lt- & gt and a CPU; the silicon stack and the direct current contactor; one end of a main loop of the direct current contactor is connected with a wiring terminal CD +, and the other end of the main loop of the direct current contactor is connected with a wiring terminal M + through a current sensor; two ends of the direct current contactor coil are respectively connected with an I/O interface of the CPU; the current sensor is connected with an A/D interface of the CPU; the first voltage sensor and the second voltage sensor are respectively connected with an A/D interface of the CPU; the first voltage sensor is respectively connected with the connecting terminals CD + and M +; the second voltage sensor is respectively connected with a connecting terminal M + and a connecting terminal M-.
2. The on-line testing device for the performance of the storage battery of the substation direct-current system as claimed in claim 1, wherein the CPU adopts a single chip microcomputer which is configured in 8-bit series of the microprocessor Atmega128, ATME L company, an advanced RISC structure, an on-chip F L ASH of 128K, an on-chip SRAM of 4K, an 8-channel 10-bit a/D converter, and two programmable serial USARTs.
3. The online testing device for the performance of the storage battery of the substation direct-current system according to claim 1, wherein when the online testing device is used for online testing of the performance of the storage battery, the online testing device and a direct-current system wiring circuit are as follows:
the direct current bus is provided with a conventional direct current load, wherein a direct current positive bus + KM is connected with the positive electrode of the storage battery pack, and a negative bus-KM is connected with the negative electrode of the storage battery and the direct current output minus end of the charger; the CD + end of the online testing device is connected with the + end of the direct current output of the charger, the M + end is connected with the direct current positive bus + KM, and the M-end is connected with the direct current negative bus-KM; the A end of the silicon stack D1 of the online testing device is connected with the CD + of the online testing device; one end of a main contact of the direct current contactor K1 and the positive input end of the first voltage sensor TV1 are connected in parallel to the CD + end of the online testing device, and the other end of the main contact of the direct current contactor K1, the negative input end of the first voltage sensor TV1 and the K end of the silicon stack D1 are connected in parallel to pass through the current sensor TA and be connected to the M + end of the online testing device; the negative input end of a second voltage sensor TV2 of the online testing device is connected with M-, and the positive input end of the second voltage sensor TV2 of the online testing device is connected with the negative input end of a first voltage sensor TV 1; two ends of a coil of the direct current contactor K1 are connected with an I/O port of the CPU, and secondary output ends of the first voltage sensor TV1, the second voltage transformer TV2 and the current sensor TA1 are connected with an A/D port of the CPU.
4. The online testing method for the performance of the storage battery of the substation direct current system is realized through the online testing device according to claims 1-3, and is characterized in that the method properly reduces the direct current output voltage of a bus on a charger, and utilizes a field load to carry out a rapid discharge test on the storage battery pack so as to rapidly verify the performance of the storage battery pack and evaluate the state of the storage battery;
the method comprises the following steps:
(1) before testing the performance of the storage battery pack, a main contact of a direct current contactor K1 of the online testing device is in a closed state, a silicon stack D1 is short-circuited and does not work, the voltage of a charger and the voltage of a direct current bus are checked through voltage sensors TV1 and TV2, whether the running condition of a direct current system is normal or not is judged, and the next step of operation is carried out after the normal running condition is confirmed;
(2) starting a test, driving a coil of a direct current contactor K1 by a CPU (Central processing Unit) of the on-line test device through an I/O (input/output) port to enable a main contact K1 to be in a disconnected state, putting a silicon stack D1 into operation, and reducing the direct current output voltage of a bus on a charger, so that a storage battery bears the direct current conventional load for a station and is in a discharging state;
(3) monitoring the discharging process, wherein in the discharging process, a CPU (central processing unit) of the online testing device collects the voltages of a charger and a direct-current bus through an A/D (analog/digital) port through a first voltage sensor TV1 and a second voltage sensor TV2, the output of the direct-current voltage and the direct-current bus voltage of the charger are monitored in real time online, once the output of the charger or a storage battery pack is abnormal, the discharging is immediately finished, and the normal running state is recovered;
(4) finishing discharging, when the set discharging time is up, driving and controlling a coil of a direct current contactor K1 by a CPU (Central processing Unit) of the online testing device through an I/O (input/output) port to enable a main contact K1 to be in a closed state, and then short-circuiting a silicon stack D1, wherein a charger automatically supplies power to a direct current load for a conventional station and charges a storage battery pack, and a direct current power supply system restores to a normal operation mode;
(5) when the discharging is finished, the CPU of the online testing device collects the voltage of the direct current bus through the A/D port through the voltage sensor TV2, if the voltage of the direct current bus is higher than a fixed value, the performance of the storage battery pack is basically good, and the actual requirement of a transformer substation is met; if the voltage of the direct current bus is lower than a fixed value, the capacity of the storage battery pack is insufficient, the performance of the storage battery is obviously reduced, and the fact that a standard discharge capacity check test is required to be carried out as soon as possible is prompted to be accurately verified.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112505561A (en) * | 2021-02-05 | 2021-03-16 | 国网江西省电力有限公司电力科学研究院 | Device and method for detecting performance of storage battery |
| CN113030762A (en) * | 2021-02-05 | 2021-06-25 | 国网宁夏电力有限公司吴忠供电公司 | Station storage battery pack checking discharge test method |
| CN117970161A (en) * | 2024-02-29 | 2024-05-03 | 国网江苏省电力有限公司泰州供电分公司 | Uninterrupted on-load capacity device and method for storage battery of direct-current system of transformer substation |
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| CN202004479U (en) * | 2010-12-29 | 2011-10-05 | 河北创科电子科技有限公司 | Discharging device of single-group storage battery of DC system |
| CN106487046A (en) * | 2015-08-25 | 2017-03-08 | 上海沪歌智能科技有限公司 | A kind of automatic maintenance management device of battery |
| CN205353322U (en) * | 2016-02-24 | 2016-06-29 | 国家电网公司 | Online capability test device of electric power storage battery |
| CN107196366A (en) * | 2017-06-07 | 2017-09-22 | 深圳奥特迅电力设备股份有限公司 | A kind of accumulator on-line maintenance system based on three port charge-discharge machines |
| CN209417261U (en) * | 2018-12-06 | 2019-09-20 | 云南电网有限责任公司昭通供电局 | A kind of disconnected direct current online testing device of accumulator capacity |
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| CN112505561A (en) * | 2021-02-05 | 2021-03-16 | 国网江西省电力有限公司电力科学研究院 | Device and method for detecting performance of storage battery |
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| CN117970161A (en) * | 2024-02-29 | 2024-05-03 | 国网江苏省电力有限公司泰州供电分公司 | Uninterrupted on-load capacity device and method for storage battery of direct-current system of transformer substation |
| CN117970161B (en) * | 2024-02-29 | 2024-08-27 | 国网江苏省电力有限公司泰州供电分公司 | Uninterrupted on-load capacity device and method for storage battery of direct-current system of transformer substation |
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