CN113030762A - Station storage battery pack checking discharge test method - Google Patents
Station storage battery pack checking discharge test method Download PDFInfo
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- CN113030762A CN113030762A CN202110163597.1A CN202110163597A CN113030762A CN 113030762 A CN113030762 A CN 113030762A CN 202110163597 A CN202110163597 A CN 202110163597A CN 113030762 A CN113030762 A CN 113030762A
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- 238000012360 testing method Methods 0.000 claims abstract description 142
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- 238000007599 discharging Methods 0.000 claims abstract description 47
- 230000005856 abnormality Effects 0.000 claims description 14
- 230000003068 static effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 description 22
- 238000010586 diagram Methods 0.000 description 10
- 238000012795 verification Methods 0.000 description 7
- 206010014357 Electric shock Diseases 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
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- 230000002159 abnormal effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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Abstract
The embodiment of the invention provides a checking discharge test method for a station storage battery pack, which comprises the following steps: according to a test starting instruction, a storage battery pack for a control station enters a standing working state by closing a circuit breaker KM3 arranged between a fuse FU1 and a fuse FU2 of a direct-current bus of a standby storage battery pack and a direct-current bus connected with a substation direct-current system, disconnecting a circuit breaker KM1 between a storage battery pack for the control station and the fuse FU1, and disconnecting a circuit breaker KM2 arranged between a discharge instrument and the storage battery pack for the control station; after the station storage battery pack is kept still, the station storage battery pack is controlled to enter a charging working state through a circuit breaker; after the station is fully filled with the storage battery pack, the station is controlled to enter a discharging working state by the storage battery pack through a circuit breaker; and determining whether the storage battery pack for the station needs to be replaced or not according to corresponding parameters acquired by the discharge instrument. The method provided by the embodiment of the invention is used for automatically realizing the checking test of the station storage battery pack, and has high safety and high convenience.
Description
Technical Field
The invention relates to the technical field of direct-current power supplies, in particular to a checking discharge test method for a station storage battery pack.
Background
The direct current system for the substation of the transformer substation is used as a control and protection power supply and a closing loop power supply of various electrical equipment in the transformer substation, and is an important basis for normal and safe operation of the transformer substation equipment. The station storage battery pack of the transformer substation is used as a standby power supply of the station direct current system, is an important guarantee for maintaining long-term normal operation of the station direct current system, and is started when the station direct current system operates abnormally, so that normal operation of transformer substation equipment is guaranteed.
Considering that the station storage battery pack is connected to the station direct current system, the floating charge state is kept all the year round, and the service life loss exists. Therefore, the station storage battery pack needs to be checked regularly, the failure risk of the station storage battery pack is checked in advance, and the possibility of voltage loss of the substation total station equipment is avoided.
At present, the checking test of a station storage battery pack of a transformer substation needs to be carried out manually through the operation of disconnecting a direct current cable in a charged mode for many times, and a tester needs to repeatedly go back and forth for many times at two places of a storage battery pack discharging and disconnecting circuit so as to monitor relevant parameters in the checking discharging test process of the storage battery after the circuit is switched, the whole process has higher risks of electric shock of personnel, short circuit of the direct current system and the like, the operation difficulty and the operation complexity of the tester are high, the life safety is threatened, and the whole transformer substation can be in voltage loss risk due to the fact that the time for separating the direct current system from a standby storage battery is too long. Generally, the safety and convenience of the checking test of the storage battery pack of the transformer substation are to be improved urgently.
Disclosure of Invention
In view of the above problems, embodiments of the present invention provide a method for testing a checking discharge test of a substation storage battery pack, which overcomes or at least partially solves the above problems, so as to improve the safety and convenience of the checking discharge test of the substation storage battery pack.
In order to solve the above problem, an embodiment of the present invention provides a method for testing a checking discharge test of a station battery pack, where the method includes:
obtaining a test starting instruction;
controlling the station battery pack to enter a static working state by closing a breaker KM3 arranged between the spare battery pack and a fuse FU1 and a fuse FU2, disconnecting a breaker KM1 arranged between the station battery pack and a fuse FU1 and a fuse FU2, and disconnecting a breaker KM2 arranged between the discharge instrument and the station battery pack according to the start test instruction; the fuse FU1 and the fuse FU2 are connected with a direct current bus of a substation direct current system;
after the station storage battery pack is kept still for a preset standing time, the station storage battery pack is controlled to enter a charging working state by disconnecting the circuit breaker KM3, closing the circuit breaker KM1 and disconnecting the circuit breaker KM2, and the station storage battery pack is charged through the substation direct-current system;
after the station storage battery pack is fully charged, the station storage battery pack is controlled to enter a discharging working state by closing the circuit breaker KM3, opening the circuit breaker KM1 and closing the circuit breaker KM2, so that the station storage battery pack is discharged, and corresponding parameters are collected through a discharging instrument;
and determining whether the storage battery pack for the station needs to be replaced or not according to corresponding parameters acquired by the discharge instrument.
Optionally, the method further comprises:
obtaining a test stopping instruction;
according to the test stopping instruction, the station storage battery pack is controlled to enter a charging working state by opening the breaker KM3, closing the breaker KM1 and opening the breaker KM2, the station storage battery pack is charged through the substation direct current system, and the test is finished.
Optionally, obtaining a start test instruction comprises:
generating a test starting instruction when detecting the touch operation of a user on a discharge starting button displayed on a touch display screen; or receiving a test starting instruction sent by a remote terminal, wherein the test starting instruction is generated when the remote terminal detects the operation of a discharge starting button displayed on a display screen of the remote terminal by a user;
obtaining a stop test instruction comprising:
generating a test stopping instruction when detecting the touch operation of a user on a discharge stopping button displayed on the touch display screen; or receiving a test stopping instruction sent by the remote terminal, wherein the test stopping instruction is generated when the remote terminal detects the operation of a discharging starting button displayed on a display screen of the remote terminal by a user.
Optionally, after controlling the station battery pack to enter a static operating state, the method further includes:
judging whether the current working state of the station storage battery pack is a standing working state or not;
when the current working state of the station storage battery pack is not a standing working state, determining that an abnormality occurs, and outputting alarm information;
the method for judging whether the current working state of the station storage battery pack is a standing working state specifically comprises the following steps:
collecting a direct current bus voltage V1 through a voltage transmitter PT1 arranged between a direct current bus of the substation direct current system and the fuse FU1 and the fuse FU 2;
collecting a spare battery pack voltage V2 through a voltage transmitter PT2 arranged between the spare battery pack and the circuit breaker KM 3;
collecting station battery pack charging current A1 through a current transformer CT1 arranged between the station battery pack and the circuit breaker KM 1;
the current transformer CT2 arranged between the discharge instrument and the circuit breaker KM2 is used for collecting the storage battery pack discharge current A2 for the station;
when V1 ≠ V2 ≠ 0 and a1 ≠ a2 ≠ 0, it is determined that the current operating state of the station battery pack is a standing operating state.
Optionally, after controlling the station battery pack to enter the charging operation state, the method further includes:
judging whether the current working state of the station storage battery pack is a charging working state or not;
when the current working state of the station storage battery pack is not the charging working state, determining that abnormality occurs, and outputting alarm information;
the method for judging whether the current working state of the station storage battery pack is a charging working state specifically comprises the following steps:
collecting a direct current bus voltage V1 through a voltage transmitter PT1 arranged between a direct current bus of the substation direct current system and the fuse FU1 and the fuse FU 2;
collecting station battery pack voltage V3 through a voltage transmitter PT3 arranged between the station battery pack and the circuit breaker KM 1;
collecting station battery pack charging current A1 through a current transformer CT1 arranged between the station battery pack and the circuit breaker KM 1;
when V1 is V3 ≠ 0 and a1 is greater than 0, the current operating state of the station battery pack is determined to be a charging operating state, wherein the current direction from a direct current bus of a substation direct current system to the station battery pack is taken as a positive direction.
Optionally, after controlling the station battery pack to enter the discharging operation state, the method further includes:
judging whether the current working state of the station storage battery pack is a discharging working state or not;
when the current working state of the station storage battery pack is not in a discharging working state, determining that abnormality occurs, and outputting alarm information;
the judging whether the current working state of the station storage battery pack is a discharging working state specifically comprises the following steps:
collecting a direct current bus voltage V1 through a voltage transmitter PT1 arranged between a direct current bus of the substation direct current system and the fuse FU1 and the fuse FU 2;
collecting a spare battery pack voltage V2 through a voltage transmitter PT2 arranged between the spare battery pack and the circuit breaker KM 3;
collecting station battery pack charging current A1 through a current transformer CT1 arranged between the station battery pack and the circuit breaker KM 1;
the current transformer CT2 arranged between the discharge instrument and the circuit breaker KM2 is used for collecting the storage battery pack discharge current A2 for the station;
when V1 ═ V2 ≠ 0 and a1 ≠ a2 and a1 ≠ a2, it is determined that the current operating state of the station battery pack is a discharging operating state, with the current direction directed to the station battery pack by the dc bus of the substation dc system as the positive direction.
Optionally, the method further comprises:
receiving a closing control instruction sent by a remote terminal and aiming at any one element of the circuit breaker KM1, the circuit breaker KM2 and the circuit breaker KM3, and controlling the corresponding element to be closed, wherein the closing control instruction is generated according to the operation of a user on a closing button corresponding to the corresponding element displayed on a display screen of the remote terminal;
receiving a disconnection control instruction sent by the remote terminal and aiming at any one element of the circuit breaker KM1, the circuit breaker KM2 and the circuit breaker KM3, and controlling the corresponding element to be disconnected, wherein the disconnection control instruction is generated according to the operation of a user on a position dividing button corresponding to the corresponding element displayed on a display screen of the remote terminal.
Optionally, determining whether the station battery pack needs to be replaced according to the corresponding parameters acquired by the discharge instrument includes:
comparing the corresponding parameters acquired by the discharge instrument with a pre-stored threshold value, and determining that the storage battery pack for the station needs to be replaced according to whether the corresponding parameters acquired by the discharge instrument are lower than the pre-stored threshold value; or
And sending the corresponding parameters acquired by the discharge instrument to a remote terminal, and determining that the storage battery pack for the station needs to be replaced according to information returned by the remote terminal, wherein the information returned by the remote terminal is generated by comparing the corresponding parameters acquired by the discharge instrument with a threshold value stored by the remote terminal and according to whether the corresponding parameters acquired by the discharge instrument are lower than the threshold value stored in advance.
Optionally, the method further comprises:
storing corresponding parameters collected by the discharge instrument;
receiving a target parameter query request, extracting and displaying target parameters from stored parameters according to the target parameter query request; or
Receiving a preset time interval query request, counting all parameters in the preset time interval in the stored parameters according to the preset time interval query request, and displaying a corresponding statistical chart
According to the technical scheme, the method comprises the steps of respectively closing or opening circuit breakers arranged between a standby storage battery pack and a direct current system, between a station storage battery pack and the direct current system and between a discharging instrument and the station storage battery pack according to a test instruction, automatically controlling the station storage battery pack to sequentially enter working states of standing, charging and discharging, correspondingly controlling the standby storage battery pack to sequentially enter the working states of charging, discharging and charging, automatically completing the checking test of the station storage battery pack, and determining whether the station storage battery pack needs to be replaced. The method provided by the embodiment can ensure that a tester for the station storage battery pack checking discharge test does not need to repeatedly disconnect the direct current cable and switch the circuit connection state in a charged mode for many times, reduces the risk of electric shock of the personnel or grounding and short circuit of a direct current system, does not need to perform complicated parameter acquisition operation and monitoring in the test process of the station storage battery pack checking discharge test, and has high safety and high convenience.
Drawings
Fig. 1 is a block diagram of a checking discharge test system for a station battery pack according to an embodiment of the present invention;
fig. 2 is a block diagram of a testing apparatus for checking discharge test of a station battery pack according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a verification discharge test of a battery pack for a station according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating steps of a method for testing a verification discharge test of a station-use battery pack according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The direct current system for the substation of the transformer substation provides a power supply for equipment operation for the transformer substation equipment, and the storage battery pack for the substation is used as a standby power supply of the direct current system for the substation, under most conditions, the direct current system for the substation of the transformer substation is in a normal operation state, and the storage battery pack for the substation cannot be started, namely, the storage battery pack for the substation is connected to the direct current system for a long time to keep trickle charge and is in a float charge state so as to ensure that the storage battery pack for the substation is sufficient in storage, and the storage battery pack for the substation can be put into the system to provide power for all direct current loads in the substation when the direct current system for the substation operates abnormally, so the storage battery pack is also called as the last barrier of the direct current system for the transformer substation, and the risk of voltage.
The station storage battery pack in a floating charge state for a long time has service life loss, so that the station storage battery pack of the transformer substation needs to be checked regularly to ensure that the actual capacity of the station storage battery pack can reach a set value, such as 80% of the rated capacity of the battery pack, so that the health state of the station storage battery pack can be known timely, the station storage battery pack is maintained and replaced before the station storage battery pack fails, and otherwise, the station storage battery pack fails or has insufficient capacity, so that the voltage loss risk of the substation total station equipment is caused when the station storage battery pack needs to be started.
The connection mode of the station storage battery pack and the station direct current system is generally a cable-fuse connection mode, in the checking test of the substation storage battery pack, a tester needs to be electrified and disconnected, the direct current cable and the fuse are connected for dozens of times, and due to the fact that the space in a direct current screen is small, the direct current system cannot be powered off, and the like, the direct current system is prone to short circuit, grounding and risks of electric shock of the personnel due to repeated operation. And for the storage battery pack with serious degradation, workers need to go to and return to two places of a storage battery pack discharging and circuit breaking circuit for multiple times, so that the working efficiency is low, and the operation is complicated. Obviously, the checking test operation process of the storage battery pack of the existing transformer substation depends on manual operation seriously, and the safety and the convenience are insufficient.
In consideration of the analyzed problems, the invention provides a checking discharge test method for the station storage battery pack, which automatically realizes checking test on the station storage battery pack by using a test instruction, effectively reduces the risk of grounding of a direct current system or electric shock of a tester, and improves the test efficiency, safety and convenience.
The station storage battery pack checking discharge test method described in this embodiment is applied to a station storage battery pack checking discharge test device in a station storage battery pack checking discharge test system.
Referring to fig. 1, fig. 1 is a block diagram of a checking discharge test system for a battery pack for a station according to an embodiment of the present invention. As shown in fig. 1, the system comprises at least: the device comprises a transformer substation direct current system, a station storage battery pack, a standby storage battery pack, a station storage battery pack checking discharge test device, a discharge instrument and a remote terminal.
The station storage battery pack checking discharge test device is connected with the transformer substation direct current system, the station storage battery pack, the standby storage battery pack, the discharge instrument and the remote terminal respectively.
Referring to fig. 2, fig. 2 is a block diagram of a structure of a station battery pack verification discharge test apparatus according to an embodiment of the present invention. As shown in fig. 2, the station-use battery pack consistency discharge test device at least includes: test circuit, control module.
As shown in fig. 2, the opening and closing of the various components in the test circuit may be controlled by the control module.
Referring to fig. 1 and 2, the station storage battery pack checking discharge test device is in communication connection with a remote terminal through a control module; and the test circuit is in circuit connection with the direct current system of the transformer substation, the station storage battery pack, the standby storage battery pack and the discharge instrument.
Referring to fig. 3, fig. 3 is a circuit configuration diagram of a verification discharge test of a station battery pack according to an embodiment of the present invention. As shown in fig. 3, each element in the test circuit includes at least: a breaker KM1, a breaker KM2 and a breaker KM 3.
Wherein the test circuit further comprises: voltage transducer PT1, voltage transducer PT2, voltage transducer PT3, and current transformer CT1, current transformer CT2, and fuse FU1, fuse FU 2.
Specifically, the test circuit can convert the circuit analog signal into a digital signal through the signal output device, and the digital signal is sent to the control module through the serial port communication connection. Similarly, the discharge instrument can also send the acquired parameters to the control module by using a serial port communication connection.
Further, the control module can establish remote communication connection with a remote terminal through an internet of things. Illustratively, the control module may be an industrial personal computer carrying a touch display screen, and may have functions of touch display, signal control, and data analysis and processing.
Referring to fig. 4, fig. 4 is a flowchart illustrating steps of a method for testing a verification discharge test of a battery pack for a station according to an embodiment of the present invention. As shown in fig. 4, the method specifically includes the following steps:
s31, obtaining a test starting instruction;
in this embodiment, the test starting instruction may be generated according to a touch operation of a user on a touch display screen of the control module, or may be received from a remote terminal. Specifically, obtaining the start test instruction may include:
generating a test starting instruction when detecting the touch operation of a user on a discharge starting button displayed on a touch display screen; or receiving a test starting instruction sent by a remote terminal, wherein the test starting instruction is generated when the remote terminal detects the operation of a discharge starting button displayed on a display screen of the remote terminal by a user.
Because the direct current system of the transformer substation cannot be separated from the storage battery packs for a long time and cannot be kept for charging the two storage battery packs for a long time, otherwise, faults or potential safety hazards may occur. Therefore, the test instruction in the present embodiment mainly functions to switch the operating state of the station secondary battery pack and/or the backup secondary battery pack. The test instructions include at least: start test instructions and stop test instructions.
In an optional implementation manner, the start test instruction may be a one-key sequential control instruction, and the test circuit may be directly controlled to sequentially complete switching of the working states of the station-use storage battery pack and/or the standby storage battery pack through the on-card test instruction, where the switching of the working states of the station-use storage battery pack includes sequentially performing standing, charging, and discharging, and the working state of the standby storage battery pack is correspondingly charging, discharging, and charging.
S32, according to the starting test instruction, controlling the station battery pack to enter a standing working state by closing a circuit breaker KM3 arranged between the spare battery pack and a fuse FU1 and a fuse FU2, disconnecting a circuit breaker KM1 arranged between the station battery pack and a fuse FU1 and a fuse FU2, and disconnecting a circuit breaker KM2 arranged between the discharge instrument and the station battery pack; the fuse FU1 and the fuse FU2 are connected with a direct current bus of a substation direct current system.
In particular, the start test instruction may be sent to a control loop of the test circuit by the control module to control the various elements comprised by the test circuit to be closed or opened.
In the embodiment, according to the standard of the storage battery pack checking test, the storage battery pack for the station is firstly placed still, when the storage battery pack for the station is in a standing working state, the storage battery pack for the station is not charged or discharged, the circuit breaker KM1 between the storage battery pack for the station and the fuse FU1 and the fuse FU2 is disconnected, and the circuit breaker KM2 arranged between the discharge instrument and the storage battery pack for the station is disconnected; in order to ensure that the substation direct current system can always be communicated with one storage battery pack, and the standby storage battery pack is correspondingly communicated with the substation direct current system for charging, the circuit breaker KM3 arranged between the standby storage battery pack and the fuse FU1 and the fuse FU2 is closed.
According to the embodiment, in the checking discharge test of the station storage battery pack, the station storage battery pack is firstly controlled to stand, and meanwhile, the standby storage battery pack is controlled to be connected to the direct current system of the transformer substation for charging, so that the stable operation of the direct current system in the test process is guaranteed.
And S33, after the station storage battery pack is stood for a preset standing time, the station storage battery pack is controlled to enter a charging working state through disconnecting the breaker KM3, closing the breaker KM1 and disconnecting the breaker KM2, and the station storage battery pack is charged through the substation direct current system.
In this embodiment, according to the standard of the storage battery pack checking test, after the station storage battery pack is stood for a preset standing time, the station storage battery pack needs to be fully charged, and when the station storage battery pack is in a charging working state, the station storage battery pack is only charged and is not discharged, the circuit breaker KM1 is closed, and the circuit breaker KM2 is opened; in order to ensure that the substation direct current system can always be connected with one storage battery pack, at the moment, the standby storage battery pack is correspondingly disconnected from the substation direct current system and is not charged any more, the breaker KM3 is disconnected.
Through the embodiment, in the checking discharge test of the storage battery pack for the station, after the storage battery pack for the station is stood for a preset standing time, the storage battery pack for the station is fully charged, meanwhile, the standby storage battery pack is controlled to be in the charging process of the storage battery pack for the station, a direct current system of a transformer substation is disconnected and not charged any more, and the stable operation of the direct current system in the testing process is guaranteed.
Specifically, the preset standing time period of the station-use storage battery pack may be 2 hours.
And S34, after the station storage battery pack is fully charged, controlling the station storage battery pack to enter a discharging working state by closing the circuit breaker KM3, opening the circuit breaker KM1 and closing the circuit breaker KM2 so as to discharge the station storage battery pack, and acquiring corresponding parameters through a discharging instrument.
In this embodiment, according to the standard of the storage battery pack checking test, after the station storage battery pack is fully charged, a discharge test can be performed, and when the station storage battery pack is in a discharge working state, the station storage battery pack is only discharged and not charged, the circuit breaker KM1 is opened, and the circuit breaker KM2 is closed; in order to ensure that the substation direct current system can always be connected with one storage battery pack, at the moment, the standby storage battery pack is correspondingly connected with the substation direct current system for charging, the circuit breaker KM3 is closed.
Through the embodiment, in the checking discharge test of the storage battery pack for the station, after the storage battery pack for the station is fully charged, the storage battery pack for the station is controlled to discharge, and meanwhile, the standby storage battery pack is controlled to be charged in the charging process of the storage battery pack for the station, and the direct current system of the transformer substation is communicated to charge, so that the stable operation of the direct current system in the test process is guaranteed.
Specifically, the station battery pack may discharge for a preset discharge time period, and further, the preset discharge time period may be 10 hours.
And S35, determining whether the storage battery pack for the station needs to be replaced or not according to corresponding parameters collected by the discharge instrument.
The station storage battery pack is connected with the discharge instrument through the test circuit to discharge, the discharge instrument can collect corresponding parameters in the discharge process, and the control module can analyze and judge according to the parameters to determine whether the station storage battery pack needs to be replaced.
The parameters at least include: and in the discharging process, the station uses the voltage information of each storage battery in the storage battery pack.
Specifically, the voltage information of each storage battery in the station storage battery pack may be collected at preset time intervals, for example, at 30 seconds.
Since the time of a complete station-used battery pack verification discharge test may be as long as tens of hours, in order to stop the station-used battery pack verification discharge test under a special condition, in an alternative embodiment, an embodiment of the present invention further provides a method for stopping a station-used battery pack test, where the method further includes:
obtaining a test stopping instruction;
according to the test stopping instruction, the station storage battery pack is controlled to enter a charging working state by opening the breaker KM3, closing the breaker KM1 and opening the breaker KM2, the station storage battery pack is charged through the substation direct current system, and the test is finished.
Through the embodiment, the control module can send the test stopping instruction to the control loop of the circuit breaker in the test circuit to control the corresponding circuit breaker to be switched off or switched on, and the state of the station storage battery pack is returned again, namely, the state of the station storage battery pack charged by the substation direct-current system under daily conditions.
Specifically, obtaining the stop test instruction may include the following steps:
generating a test stopping instruction when detecting the touch operation of a user on a discharge stopping button displayed on the touch display screen; or receiving a test stopping instruction sent by the remote terminal, wherein the test stopping instruction is generated when the remote terminal detects the operation of a discharging starting button displayed on a display screen of the remote terminal by a user.
Through the embodiment, a user can stop testing at any time in the testing process through the touch display screen of the control module or the remote terminal so as to deal with faults or accidents possibly occurring in the testing process.
Based on the circuit control requirement for ensuring the stable operation of the transformer substation, the working state of the storage battery pack for the substation is judged only from the switching state of each breaker in the storage battery pack switching loop, and the risks of misjudgment and incapability of timely finding circuit faults exist. In order to accurately judge and monitor the working state of the station storage battery pack, the voltage or the current of a key component in the station storage battery pack checking discharge test system needs to be measured and collected. Wherein the key components include at least: the system comprises a transformer substation direct current system, a station storage battery pack, a standby storage battery pack and a discharge instrument.
Therefore, the key voltage parameters and the key circuit parameters can be fed back to the control module in real time in the form of digital signals by a voltage transmitter and a current transformer in the test circuit, and the control module analyzes and processes the digital signals to determine that the current working state of the station storage battery pack is a standing, charging or discharging working state.
In an optional implementation manner, an embodiment of the present invention further provides a method for determining a standing operating state of a station storage battery pack, where after the station storage battery pack is controlled to enter the standing operating state, the method further includes the following steps:
judging whether the current working state of the station storage battery pack is a standing working state or not;
when the current working state of the station storage battery pack is not a standing working state, determining that an abnormality occurs, and outputting alarm information;
the method for judging whether the current working state of the station storage battery pack is a standing working state specifically comprises the following steps:
collecting a direct current bus voltage V1 through a voltage transmitter PT1 arranged between a direct current bus of the substation direct current system and the fuse FU1 and the fuse FU 2;
collecting a spare battery pack voltage V2 through a voltage transmitter PT2 arranged between the spare battery pack and the circuit breaker KM 3;
collecting station battery pack charging current A1 through a current transformer CT1 arranged between the station battery pack and the circuit breaker KM 1;
the current transformer CT2 arranged between the discharge instrument and the circuit breaker KM2 is used for collecting the storage battery pack discharge current A2 for the station;
when V1 ≠ V2 ≠ 0 and a1 ≠ a2 ≠ 0, it is determined that the current operating state of the station battery pack is a standing operating state.
Specifically, since the voltage transducer PT1 measures the dc bus voltage V1, the voltage transducer PT2 measures the reserve battery pack voltage V2; current transformer CT1 measures station pack charging current a1, and current transformer CT2 measures station pack discharging current a 2. Therefore, when V1 ═ V2 ≠ 0 and a1 ═ a2 ═ 0, the dc bus voltage is equal to the backup battery pack voltage and is not zero, indicating that the dc bus is charging the backup battery pack and that the station battery pack should be in a resting or discharging operating state; the discharging current of the station storage battery pack and the current of the discharging instrument are both 0, which indicates that the station storage battery pack is not discharging at the moment; therefore, the current working state of the station storage battery pack can be judged and determined to be a standing working state.
According to the embodiment, the control module can compare the current working state of the station storage battery pack with the current working state after determining that the current working state of the station storage battery pack is the standing working state, determine that an abnormality occurs when the current working state of the station storage battery pack is not the standing working state, and output alarm information through a local touch display screen of the control module and/or a display screen of a remote terminal to inform a user of the occurrence of a fault or the abnormality.
In an optional implementation manner, an embodiment of the present invention further provides a method for determining a charging operating state of a station storage battery pack, where after the station storage battery pack is controlled to enter the charging operating state, the method further includes the following steps:
judging whether the current working state of the station storage battery pack is a charging working state or not;
when the current working state of the station storage battery pack is not the charging working state, determining that abnormality occurs, and outputting alarm information;
the method for judging whether the current working state of the station storage battery pack is a charging working state specifically comprises the following steps:
collecting a direct current bus voltage V1 through a voltage transmitter PT1 arranged between a direct current bus of the substation direct current system and the fuse FU1 and the fuse FU 2;
collecting station battery pack voltage V3 through a voltage transmitter PT3 arranged between the station battery pack and the circuit breaker KM 1;
collecting station battery pack charging current A1 through a current transformer CT1 arranged between the station battery pack and the circuit breaker KM 1;
when V1 is V3 ≠ 0 and a1 is greater than 0, the current operating state of the station battery pack is determined to be a charging operating state, wherein the current direction from a direct current bus of a substation direct current system to the station battery pack is taken as a positive direction.
Specifically, since the voltage transducer PT1 measures the dc bus voltage V1, the voltage transducer PT3 measures the occupancy battery pack voltage V3; current transformer CT1 measures station pack charging current a1, and current transformer CT2 measures station pack discharging current a 2. Therefore, when V1 ═ V3 ≠ 0 and a1 > 0, the dc bus voltage is equal to the station battery pack voltage and is not zero, and at the same time, the direction of the current is directed from the dc bus to the station battery pack, indicating that the dc bus is charging the station battery pack and that the station battery pack should be in a charging operation state.
According to the embodiment, the control module can compare the current working state of the station storage battery pack with the current working state after determining that the current working state of the station storage battery pack is the charging working state, determine that an abnormality occurs when the current working state of the station storage battery pack is not the charging working state, and output alarm information through a local touch display screen of the control module and/or a display screen of a remote terminal to inform a user of the occurrence of a fault or the abnormality.
In an optional implementation manner, an embodiment of the present invention further provides a method for determining a discharge operating state of a station storage battery pack, where after the station storage battery pack is controlled to enter the discharge operating state, the method further includes the following steps:
judging whether the current working state of the station storage battery pack is a discharging working state or not;
when the current working state of the station storage battery pack is not in a discharging working state, determining that abnormality occurs, and outputting alarm information;
the judging whether the current working state of the station storage battery pack is a discharging working state specifically comprises the following steps:
collecting a direct current bus voltage V1 through a voltage transmitter PT1 arranged between a direct current bus of the substation direct current system and the fuse FU1 and the fuse FU 2;
collecting a spare battery pack voltage V2 through a voltage transmitter PT2 arranged between the spare battery pack and the circuit breaker KM 3;
collecting station battery pack charging current A1 through a current transformer CT1 arranged between the station battery pack and the circuit breaker KM 1;
the current transformer CT2 arranged between the discharge instrument and the circuit breaker KM2 is used for collecting the storage battery pack discharge current A2 for the station;
when V1 ═ V2 ≠ 0 and a1 ≠ a2 and a1 ≠ a2, it is determined that the current operating state of the station battery pack is a discharging operating state, with the current direction directed to the station battery pack by the dc bus of the substation dc system as the positive direction.
Specifically, since the voltage transducer PT1 measures the dc bus voltage V1, the voltage transducer PT2 measures the reserve battery pack voltage V2; current transformer CT1 measures station pack charging current a1, and current transformer CT2 measures station pack discharging current a 2. Therefore, when V1 ═ V2 ≠ 0 and a1 ≠ a2 and a1 ≠ a2, the dc bus voltage is equal to the backup battery pack voltage and is not zero, indicating that the dc bus is charging the backup battery pack and that the station battery pack should be in a resting or discharging operating state; the discharging current of the station storage battery pack and the current of the discharging instrument are in equal and opposite directions, and the station storage battery pack is indicated to be discharging at the moment; therefore, it is possible to judge and determine that the current operating state of the station battery pack is the discharge operating state.
According to the embodiment, the control module can compare the current working state of the station storage battery pack with the current working state after determining that the current working state of the station storage battery pack is the discharging working state, determine that the station storage battery pack is abnormal when the current working state of the station storage battery pack is not the discharging working state, and output alarm information through a local touch display screen of the control module and/or a display screen of a remote terminal to inform a user of the fault or the abnormality.
Through the embodiment, the station storage battery pack and the standby storage battery pack are required to meet the preset working state requirement at the same time, the working state of the station storage battery pack can be judged, a user can be effectively reminded of removing obstacles, and the direct current system is prevented from being connected into the two storage battery packs for long time to charge or being separated from the storage battery packs for long time, so that large-scale faults or potential safety hazards are caused.
The above-mentioned embodiment can conveniently and safely carry out one-key control type test on the station storage battery pack checking performance, and in some test scenarios, a user also has a need for controlling or testing a single element, for example, when a program has an unknown fault, a certain element needs to be controlled to be closed or a short card needs to be controlled again. In order to provide convenient test control for a user, in an optional implementation manner, an embodiment of the present invention further provides a method for testing a station battery pack, where the method specifically includes the following steps:
receiving a closing control instruction sent by a remote terminal and aiming at any one element of the circuit breaker KM1, the circuit breaker KM2 and the circuit breaker KM3, and controlling the corresponding element to be closed, wherein the closing control instruction is generated according to the operation of a user on a closing button corresponding to the corresponding element displayed on a display screen of the remote terminal;
receiving a disconnection control instruction sent by the remote terminal and aiming at any one element of the circuit breaker KM1, the circuit breaker KM2 and the circuit breaker KM3, and controlling the corresponding element to be disconnected, wherein the disconnection control instruction is generated according to the operation of a user on a position dividing button corresponding to the corresponding element displayed on a display screen of the remote terminal.
Specifically, a main wiring diagram of the test circuit may be displayed on a display screen of the remote terminal, where the main wiring diagram includes at least a virtual breaker KM1, a virtual breaker KM2, and a virtual breaker KM3, which correspond to the breaker KM1, the breaker KM2, and the breaker KM3, respectively. So that a user can control the closing or opening of one or more circuit breakers, the remote terminal sends a closing control command and/or an opening control command to the control module, and accordingly any one of the actual circuit breakers KM1, KM2 and KM3 in the test circuit is closed or opened, and the manual control of the test road is completed.
In an optional implementation manner, an embodiment of the present invention further provides a method for determining whether a station battery pack needs to be replaced, where the method specifically includes:
comparing the corresponding parameters acquired by the discharge instrument with a pre-stored threshold value, and determining that the storage battery pack for the station needs to be replaced according to whether the corresponding parameters acquired by the discharge instrument are lower than the pre-stored threshold value; or
And sending the corresponding parameters acquired by the discharge instrument to a remote terminal, and determining that the storage battery pack for the station needs to be replaced according to information returned by the remote terminal, wherein the information returned by the remote terminal is generated by comparing the corresponding parameters acquired by the discharge instrument with a threshold value stored by the remote terminal and according to whether the corresponding parameters acquired by the discharge instrument are lower than the threshold value stored in advance.
Specifically, the pre-stored threshold may be 80% of the rated voltage of each storage battery in the station storage battery pack, that is, if the voltage value of each storage battery in the station storage battery pack is not lower than 80% of the rated voltage within a preset discharging time period, it is determined that the health state of the station storage battery pack is qualified and does not need to be replaced; and if the voltage value of one or more storage batteries in the station storage battery pack is lower than 80% of the rated voltage, judging that the health state of the station storage battery pack is unqualified, and replacing the whole group of station storage battery pack.
Furthermore, the control module can send the corresponding parameters collected by the discharge instrument to the remote terminal, the remote terminal judges the parameters and returns the judgment information to the station storage battery pack checking discharge test device. The information returned by the remote terminal may specifically be information artificially determined by a tester remotely or information automatically determined by a remote terminal machine. Wherein the priority of the artificial decision may be greater than the machine decision.
In order to further reduce the complexity of manually determining whether the battery needs to be replaced and improve the working efficiency, in an optional implementation manner, an embodiment of the present invention further provides a method for testing a station battery pack, where the method specifically includes the following steps:
storing corresponding parameters collected by the discharge instrument;
receiving a target parameter query request, extracting and displaying target parameters from stored parameters according to the target parameter query request; or
Receiving a preset time interval query request, counting all the parameters in the preset time interval in the stored parameters according to the preset time interval query request, and displaying a corresponding statistical chart.
In this embodiment, the control module may integrate and store the corresponding parameters collected by the discharge instrument, and count the parameters in the preset time period according to the preset time period query request, so as to generate a corresponding statistical chart and display the statistical chart for the user to view. For example, the voltage information of the preset time period may be aggregated according to the serial number of the sub-battery, and displayed in a graphical form according to a time axis.
Through the embodiment, the corresponding parameters collected by the discharge instrument can be stored, and can be inquired and checked by a user in an intuitive mode, so that the high-efficiency judgment of the test result by manpower is realized.
The target parameter query request is generated according to the operation of a user on the target parameter to be queried.
Optionally, the control module may also send the corresponding parameters collected by the discharge instrument to a remote terminal, and the remote terminal integrates and stores the parameters, so that the remote terminal extracts and displays the target parameters from the stored parameters according to a target parameter query request generated by the operation of the user; or
Receiving a preset time interval query request, counting all the parameters in the preset time interval in the stored parameters according to the preset time interval query request, and displaying a corresponding statistical chart.
In an optional implementation manner, parameters acquired by the discharge instrument can be integrated and uploaded to the cloud server, and the integrated parameters are acquired by the remote terminal or the control module, so that a user can check each parameter in a preset time period, namely historical test data in the preset time period.
The station storage battery pack checking discharge test method provided by the embodiment of the invention can realize the following beneficial effects:
(1) by the method, the testing instruction is utilized to carry out one-key sequence control on the checking test process of the station storage battery pack, and control and data reading of the checking test of the station storage battery pack are completed, so that a tester can be free from repeatedly electrified disconnection and connection of a circuit between a direct-current system of the transformer substation and the station storage battery pack, the grounding risk of the direct-current system of the transformer substation or the electric shock risk of the tester are effectively reduced, and the test safety is enhanced;
(2) by the method, the testing instruction is utilized to carry out one-key sequence control on the checking test process of the station storage battery pack, so that testers can directly carry out fool operation, control and data reading of the checking test of the station storage battery pack are realized, the convenience of the checking test of the station storage battery pack is effectively enhanced, and the labor cost is reduced;
(3) according to the method, the one-key sequence control is carried out on the checking test process of the station storage battery pack by using the test instruction, the corresponding working state switching of the working states of the standby storage battery pack and the station storage battery pack is realized, the direct-current system is always connected with one storage battery pack to charge the storage battery pack, the fault voltage loss risk of the transformer substation is effectively reduced, and the test stability is improved.
(4) By the method, in the checking test process of the station storage battery pack, a user can control the state of each element in the diagram according to the circuit wiring diagram, so that the checking test process of the station storage battery pack is conveniently and manually controlled, and the operability of the checking discharge test of the station storage battery pack is further enhanced.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The method for testing the checking discharge test of the station storage battery pack provided by the invention is described in detail, a specific example is applied in the method for explaining the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (9)
1. A checking discharge test method for a station storage battery pack is characterized by comprising the following steps:
obtaining a test starting instruction;
controlling the station battery pack to enter a static working state by closing a breaker KM3 arranged between the spare battery pack and a fuse FU1 and a fuse FU2, disconnecting a breaker KM1 arranged between the station battery pack and a fuse FU1 and a fuse FU2, and disconnecting a breaker KM2 arranged between the discharge instrument and the station battery pack according to the start test instruction; the fuse FU1 and the fuse FU2 are connected with a direct current bus of a substation direct current system;
after the station storage battery pack is kept still for a preset standing time, the station storage battery pack is controlled to enter a charging working state by disconnecting the circuit breaker KM3, closing the circuit breaker KM1 and disconnecting the circuit breaker KM2, and the station storage battery pack is charged through the substation direct-current system;
after the station storage battery pack is fully charged, the station storage battery pack is controlled to enter a discharging working state by closing the circuit breaker KM3, opening the circuit breaker KM1 and closing the circuit breaker KM2, so that the station storage battery pack is discharged, and corresponding parameters are collected through a discharging instrument;
and determining whether the storage battery pack for the station needs to be replaced or not according to corresponding parameters acquired by the discharge instrument.
2. The method of claim 1, further comprising:
obtaining a test stopping instruction;
according to the test stopping instruction, the station storage battery pack is controlled to enter a charging working state by opening the breaker KM3, closing the breaker KM1 and opening the breaker KM2, the station storage battery pack is charged through the substation direct current system, and the test is finished.
3. The method of claim 2, wherein obtaining a start test instruction comprises:
generating a test starting instruction when detecting the touch operation of a user on a discharge starting button displayed on a touch display screen; or receiving a test starting instruction sent by a remote terminal, wherein the test starting instruction is generated when the remote terminal detects the operation of a discharge starting button displayed on a display screen of the remote terminal by a user;
obtaining a stop test instruction comprising:
generating a test stopping instruction when detecting the touch operation of a user on a discharge stopping button displayed on the touch display screen; or receiving a test stopping instruction sent by the remote terminal, wherein the test stopping instruction is generated when the remote terminal detects the operation of a discharging starting button displayed on a display screen of the remote terminal by a user.
4. The method of claim 1, wherein after controlling the station battery pack to enter a rest operating state, the method further comprises:
judging whether the current working state of the station storage battery pack is a standing working state or not;
when the current working state of the station storage battery pack is not a standing working state, determining that an abnormality occurs, and outputting alarm information;
the method for judging whether the current working state of the station storage battery pack is a standing working state specifically comprises the following steps:
collecting a direct current bus voltage V1 through a voltage transmitter PT1 arranged between a direct current bus of the substation direct current system and the fuse FU1 and the fuse FU 2;
collecting a spare battery pack voltage V2 through a voltage transmitter PT2 arranged between the spare battery pack and the circuit breaker KM 3;
collecting station battery pack charging current A1 through a current transformer CT1 arranged between the station battery pack and the circuit breaker KM 1;
the current transformer CT2 arranged between the discharge instrument and the circuit breaker KM2 is used for collecting the storage battery pack discharge current A2 for the station;
when V1 ≠ V2 ≠ 0 and a1 ≠ a2 ≠ 0, it is determined that the current operating state of the station battery pack is a standing operating state.
5. The method of claim 1, wherein after controlling the station battery pack to enter a charge operating state, the method further comprises:
judging whether the current working state of the station storage battery pack is a charging working state or not;
when the current working state of the station storage battery pack is not the charging working state, determining that abnormality occurs, and outputting alarm information;
the method for judging whether the current working state of the station storage battery pack is a charging working state specifically comprises the following steps:
collecting a direct current bus voltage V1 through a voltage transmitter PT1 arranged between a direct current bus of the substation direct current system and the fuse FU1 and the fuse FU 2;
collecting station battery pack voltage V3 through a voltage transmitter PT3 arranged between the station battery pack and the circuit breaker KM 1;
collecting station battery pack charging current A1 through a current transformer CT1 arranged between the station battery pack and the circuit breaker KM 1;
when V1 is V3 ≠ 0 and a1 is greater than 0, the current operating state of the station battery pack is determined to be a charging operating state, wherein the current direction from a direct current bus of a substation direct current system to the station battery pack is taken as a positive direction.
6. The method of claim 1, wherein after controlling the station battery pack to enter a discharge operating state, the method further comprises:
judging whether the current working state of the station storage battery pack is a discharging working state or not;
when the current working state of the station storage battery pack is not in a discharging working state, determining that abnormality occurs, and outputting alarm information;
the judging whether the current working state of the station storage battery pack is a discharging working state specifically comprises the following steps:
collecting a direct current bus voltage V1 through a voltage transmitter PT1 arranged between a direct current bus of the substation direct current system and the fuse FU1 and the fuse FU 2;
collecting a spare battery pack voltage V2 through a voltage transmitter PT2 arranged between the spare battery pack and the circuit breaker KM 3;
collecting station battery pack charging current A1 through a current transformer CT1 arranged between the station battery pack and the circuit breaker KM 1;
the current transformer CT2 arranged between the discharge instrument and the circuit breaker KM2 is used for collecting the storage battery pack discharge current A2 for the station;
when V1 ═ V2 ≠ 0 and a1 ≠ a2 and a1 ≠ a2, it is determined that the current operating state of the station battery pack is a discharging operating state, with the current direction directed to the station battery pack by the dc bus of the substation dc system as the positive direction.
7. The method of claim 1, further comprising:
receiving a closing control instruction sent by a remote terminal and aiming at any one element of the circuit breaker KM1, the circuit breaker KM2 and the circuit breaker KM3, and controlling the corresponding element to be closed, wherein the closing control instruction is generated according to the operation of a user on a closing button corresponding to the corresponding element displayed on a display screen of the remote terminal;
receiving a disconnection control instruction sent by the remote terminal and aiming at any one element of the circuit breaker KM1, the circuit breaker KM2 and the circuit breaker KM3, and controlling the corresponding element to be disconnected, wherein the disconnection control instruction is generated according to the operation of a user on a position dividing button corresponding to the corresponding element displayed on a display screen of the remote terminal.
8. The method of claim 1, wherein determining whether the station battery pack needs to be replaced based on the discharge meter collecting the corresponding parameter comprises:
comparing the corresponding parameters acquired by the discharge instrument with a pre-stored threshold value, and determining that the storage battery pack for the station needs to be replaced according to whether the corresponding parameters acquired by the discharge instrument are lower than the pre-stored threshold value; or
And sending the corresponding parameters acquired by the discharge instrument to a remote terminal, and determining that the storage battery pack for the station needs to be replaced according to information returned by the remote terminal, wherein the information returned by the remote terminal is generated by comparing the corresponding parameters acquired by the discharge instrument with a threshold value stored by the remote terminal and according to whether the corresponding parameters acquired by the discharge instrument are lower than the threshold value stored in advance.
9. The method of claim 1, further comprising:
storing corresponding parameters collected by the discharge instrument;
receiving a target parameter query request, extracting and displaying target parameters from stored parameters according to the target parameter query request; or
Receiving a preset time interval query request, counting all the parameters in the preset time interval in the stored parameters according to the preset time interval query request, and displaying a corresponding statistical chart.
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Cited By (1)
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Application publication date: 20210625 |