CN209841989U - Transformer substation direct current system storage battery connection detection device - Google Patents
Transformer substation direct current system storage battery connection detection device Download PDFInfo
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- CN209841989U CN209841989U CN201920277066.3U CN201920277066U CN209841989U CN 209841989 U CN209841989 U CN 209841989U CN 201920277066 U CN201920277066 U CN 201920277066U CN 209841989 U CN209841989 U CN 209841989U
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Abstract
The utility model relates to a transformer substation direct current system storage battery connection detection device, which belongs to the technical field of transformer substation direct current system storage battery connection detection devices; the technical problem to be solved is as follows: providing a storage battery connection detection device of a direct current system of a transformer substation; the technical scheme for solving the technical problem is as follows: the method comprises the following steps: the storage battery pack is arranged in a special storage battery chamber or a storage battery cabinet, power line clamps CL1 and CL2 of the connection detection device are clamped on a transition plate of the storage battery pack, the wire clamp CL1 is clamped on the negative electrode of the transition plate, and the wire clamp CL2 is clamped on the positive electrode of the transition plate; a resistance adjusting device, a digital display ammeter, a DC/DC module, a radiator and a working switch QF1 are arranged in the connection detection device, the input end of the digital display ammeter is respectively connected with a clamp type current transformer CT1 and a clamp type current transformer CT2, the clamp type current transformer CT1 is connected with the wire outlet end of the storage battery, and the clamp type current transformer CT2 is connected with the bus end; the utility model discloses be applied to the direct current power supply system of transformer substation.
Description
Technical Field
The utility model relates to a detection device is connected to direct current system battery of transformer substation belongs to direct current system battery of transformer substation and connects detection device technical field.
Background
The direct current power supply system used in the present transformer substation provides a direct current power supply for the aspects of tripping and closing of a breaker, relay protection, automatic device control, signal communication, emergency lighting and the like in a normal state, and plays the role of an independent power supply when the transformer substation has an emergency power failure so as to ensure that the power supply is not interrupted; therefore, whether the direct current system is reliable or not plays a crucial role in the safe operation of the transformer substation, and the safe operation of the transformer substation is guaranteed.
According to the requirements of relevant operating regulations and regulations of a power grid, a newly installed valve-controlled sealed storage battery pack is subjected to a full-check discharge test, then a check discharge test is carried out every two years, the storage battery pack after four years is operated, and a check discharge test is carried out every year; the storage battery pack operated by a direct current power supply system in a floating charging mode needs to be subjected to a full-capacity check charging and discharging experiment periodically in order to detect the actual capacity of the storage battery pack, uniformly activate effective substances on a storage battery plate, prolong the service life of the storage battery and enable the storage battery to work at a healthy level.
In the full-capacity checking charge-discharge test, the storage battery pack to be detected needs to be temporarily withdrawn from a direct-current system, a standby storage battery pack is merged into the system, or the running mode of the direct-current system is adjusted, so that two sections of direct-current buses run in parallel; however, because the internal resistance of the valve-controlled sealed storage battery is very small, the voltage drop is very low, and the terminal voltage of the storage battery in a floating charge state is almost consistent with the electromotive force of the storage battery in an open circuit state, after an overhaul worker disconnects an air switch or an isolating switch at the outlet of the storage battery, the overhaul worker cannot see an obvious disconnection point, and is difficult to judge whether the storage battery pack reliably exits the system only according to the voltage value of the battery pack;
if the storage battery pack does not perform checking discharge under the condition of not separating from the system, a maintainer opens a storage battery loop under the loaded condition of the storage battery pack, so that arc discharge and discharge can be caused, the storage battery is in short circuit and is electrically shocked by people in serious conditions, long-term heavy load of charging equipment can be caused, and the device is damaged due to overheating.
After the storage battery is fully charged, the storage battery pack needs to be incorporated into the system, if an air switch or an isolating switch at the outlet of the storage battery is not in place at the moment, or a fuse is fused, a fusing signal is not given an alarm, so that the storage battery cannot be perceived after being opened, no storage battery is supplied on a direct-current bus for a long time, and power loss of a total station is caused after power failure of a station power utilization accident, so that serious consequences such as protection rejection, primary equipment burnout and the like are caused; therefore, after the battery pack is incorporated into the system, effective measures should be taken to check whether the battery pack has been reliably incorporated into the system.
When the storage battery is reconstructed, overhauled or subjected to daily tests, the running mode of a direct current system needs to be adjusted, the storage battery pack to be processed is withdrawn, an overhaul worker needs to check whether the storage battery pack to be processed is reliably withdrawn or not in time in the operation process and check whether the storage battery pack corresponds to a bus or not, and the situation that the battery and a charging device do not correspond is caused by the fact that the storage battery pack is not in place during acceptance check or a label is mistaken in the operation process.
In order to solve the above problems, a device capable of clearly determining whether the storage battery is reliably withdrawn from the system or whether the storage battery is connected to the system needs to be developed, so as to detect the connection condition of the storage battery of the direct current system of the transformer substation.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome not enough that exists among the prior art, the technical problem that will solve is: providing a storage battery connection detection device of a direct current system of a transformer substation; in order to solve the technical problem, the utility model discloses a technical scheme be: a transformer substation direct current system storage battery connection detection device includes: the storage battery pack is arranged in a special storage battery chamber or a storage battery cabinet, power line clamps CL1 and CL2 of the connection detection device are clamped on a transition plate of the storage battery pack, the clamp CL1 is clamped on the negative pole of the transition plate, and the clamp CL2 is clamped on the positive pole of the transition plate;
a resistance adjusting device, a digital display ammeter, a DC/DC module, a radiator and a working switch QF1 are arranged in the connection detection device, the input end of the digital display ammeter is respectively connected with a clamp type current transformer CT1 and a clamp type current transformer CT2, the clamp type current transformer CT1 is connected with the wire outlet end of the storage battery, and the clamp type current transformer CT2 is connected with the bus end;
the power supply input end of the digital display ammeter is connected with a DC/DC module, the power supply input end of the DC/DC module is connected with a working switch QF1 in series and then is connected with power line clamps CL1 and CL2, and the DC/DC module supplies power to the radiator at the same time;
the wire inlet end of the resistance adjusting device is connected with the wire clamp CL1 after being connected with the working switch QF1 in series, and the wire outlet end of the resistance adjusting device is connected with the wire clamp CL2 after being connected with the working switch QF1 in series;
the bus end of the transition plate of the storage battery pack is sequentially connected in series with a fuse FU and a bus isolating switch QF2 and then connected with a direct current bus, a storage battery voltmeter V1 is further connected in parallel to a connecting line between the fuse FU and the bus isolating switch QF2, and a bus voltmeter V2 is further connected in parallel to the direct current bus.
The wire inlet end of the resistance adjusting device is connected with the fixed end of the gear switch, the movable end of the gear switch can be connected with one end of a four-way resistor R1-R4, and the other ends of the resistors R1-R4 are connected with corresponding gear indicator lamps L1-L4 in series and then are connected with the wire outlet end of the adjusting device respectively.
The resistors R1, R2, R3 and R4 in the resistor adjusting device are specifically corrugated resistors, and the resistance value is 200-500 omega.
The input end voltage of the DC/DC module is direct current 220V, the output end voltage is direct current 12V, and working power supplies are respectively provided for the digital display ammeter and the radiator.
The radiator is arranged at the heat radiation port of the resistance adjusting device.
The utility model discloses beneficial effect for prior art possesses does: the utility model provides a detection device is connected to direct current system battery of transformer substation can accurately judge whether the battery withdraws from or incorporates direct current system, avoids opening the battery return circuit and the emergence accident under the battery pack load condition, has simplified the routine maintenance work, promotes the factor of safety of direct current overhaul of the equipments work, improves work efficiency.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
fig. 1 is a schematic diagram of the circuit structure of the present invention.
In the figure: the device comprises a storage battery pack 1, a connection detection device 2, a resistance adjusting device 3, a digital display ammeter 4, a DC/DC module 5 and a radiator 6.
Detailed Description
As shown in fig. 1, the utility model relates to a detection device is connected to direct current system battery of transformer substation, include: the storage battery pack comprises a storage battery pack 1 and a connection detection device 2, wherein the storage battery pack 1 is arranged in a special storage battery chamber or a storage battery cabinet, power line clamps CL1 and CL2 of the connection detection device 2 are clamped on a transition plate of the storage battery pack 1, a clamp CL1 is clamped on the negative electrode of the transition plate, and a clamp CL2 is clamped on the positive electrode of the transition plate;
the connection detection device 2 is internally provided with a resistance adjusting device 3, a digital display ammeter 4, a DC/DC module 5, a radiator 6 and a working switch QF1, the input end of the digital display ammeter 4 is respectively connected with a clamp type current transformer CT1 and a clamp type current transformer CT2, the clamp type current transformer CT1 is connected with the wire outlet end of the storage battery 1, and the clamp type current transformer CT2 is connected with the bus end;
the power supply input end of the digital display ammeter 4 is connected with the DC/DC module 5, the power supply input end of the DC/DC module 5 is connected with the power line clamps CL1 and CL2 after being connected with the working switch QF1 in series, and the DC/DC module 5 supplies power to the radiator 6 at the same time;
the wire inlet end of the resistance adjusting device 3 is connected with the wire clamp CL1 after being connected with the operating switch QF1 in series,
the outlet end of the resistance adjusting device 3 is connected with a working switch QF1 in series and then is connected with a wire clamp CL 2;
the bus end of the transition plate of the storage battery pack 1 is sequentially connected in series with a fuse FU and a bus isolating switch QF2 and then connected with a direct current bus, a storage battery voltmeter V1 is connected in parallel to a connecting line between the fuse FU and the bus isolating switch QF2, and a bus voltmeter V2 is connected in parallel to the direct current bus.
The wire inlet end of the resistance adjusting device 3 is connected with the fixed end of the gear switch, the movable end of the gear switch can be connected with one end of a four-way resistor R1-R4, and the other ends of the resistors R1-R4 are connected with corresponding gear indicator lamps L1-L4 in series and then are connected with the wire outlet end of the adjusting device 3 respectively.
The resistors R1, R2, R3 and R4 in the resistor adjusting device 3 are specifically ripple resistors, and the resistance value is 200-500 Ω.
The input end voltage of the DC/DC module 5 is direct current 220V, the output end voltage is direct current 12V, and working power supplies are respectively provided for the digital display ammeter 4 and the radiator 6.
The radiator 6 is installed at the heat radiation port of the resistance adjusting device 3.
The storage battery pack used in the substation direct current system is usually arranged independently and is generally provided with a special storage battery chamber or a storage battery cabinet, the storage battery total fuse FU and a bus isolating switch QF2 on the storage battery are arranged on a charger screen, when the storage battery exits from the direct current system, a worker needs to disconnect the bus isolating switch QF2 on the storage battery, the voltage values measured by a storage battery voltmeter V1 and a bus voltmeter V2 are almost consistent, in order to detect whether the storage battery pack reliably exits from the direct current system, a resistance adjusting device is incorporated on a transition plate at a storage battery pack outlet end, a built-in adjustable discharge resistor R1-R4 is adopted, the resistor is a ripple resistor, in order to ensure that the discharge current can reach 1A (according to different capacities, the large current should be adjusted properly), the discharge resistor with the maximum specification of 200 and 500 omega is selected, and in order to avoid the temperature of the resistance adjusting device from rising too, the radiator fan is separately arranged at the heat radiation opening for heat radiation.
For guaranteeing detection device inner loop safe and reliable, the utility model discloses a B type miniature circuit breaker is done as protection switch, and rated current is 3A, possesses the quick function of cutting off.
The utility model discloses connect two sets of CT current transformers (can measure bigger electric current) respectively in storage battery side and bus side, inspect whether the power of discharging comes from storage battery or direct current generating line to judge whether storage battery reliably withdraws from direct current system; the current transformers CT1 and CT2 adopt hand-held open-close transformers, are convenient to install and disassemble, and can be taken down and recycled after detection is finished;
the working power supply of the digital display ammeter and the radiator is 12V and is supplied with power by the DC/DC voltage reduction module.
The CT1 and the CT2 of the utility model are caliper type current transformers, the maximum rated current is 30A, and independent and wireless caliper ampere meters and wired caliper transformers can be adopted; the gear indicator lamps L1, L2, L3 and L4 are LED red light sources, when the gear selector switch is switched, the corresponding gear indicator lamps are turned on, and the rest indicator lamps are turned off; the working power supply of the digital display ammeter is direct current 12V and is used for displaying the current values of the CT1 and the CT 2.
The utility model discloses use at 220kV and above voltage class transformer substation, adopt two power supply modes that fill of two electricity, No. 1 battery and No. 1 charging device, No. 2 battery and No. 2 charging device connect respectively on I, II section direct current generating lines, and normal operating mode is I, II direct current generating line branch row operation.
The utility model discloses when using, the power cord fastener clamp with detection device is connected to the battery is on storage battery's transition board, beat the gear switch at R1 shelves this moment, closed detection instrument switch QF1, L1 pilot lamp volume, the corresponding numerical value of digital display ampere meter display, press from both sides current transformer CT1 that opens and shuts with the caliper type in the storage battery side, press from both sides CT2 in the bus side, adjust the gear switch, observe the numerical value change of digital display ampere meter, if CT1 has electric current and CT2 does not have electric current, it has the reliable disconnection to explain storage battery, if CT2 has electric current and CT1 does not have electric current, it does not break out to explain the battery.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (5)
1. The utility model provides a detection device is connected to direct current system battery of transformer substation which characterized in that: the method comprises the following steps: the storage battery pack (1) and the connection detection device (2), the storage battery pack (1) is arranged in a special storage battery chamber or a storage battery cabinet, power line clamps CL1 and CL2 of the connection detection device (2) are clamped on a transition plate of the storage battery pack (1), the clamp CL1 is clamped on the negative pole of the transition plate, and the clamp CL2 is clamped on the positive pole of the transition plate;
a resistance adjusting device (3), a digital display ammeter (4), a DC/DC module (5), a radiator (6) and a working switch QF1 are arranged in the connection detection device (2), the input end of the digital display ammeter (4) is respectively connected with a clamp type current transformer CT1 and a clamp type current transformer CT2, the clamp type current transformer CT1 is connected with the wire outlet end of the storage battery pack (1), and the clamp type current transformer CT2 is connected with the bus terminal;
the power supply input end of the digital display ammeter (4) is connected with the DC/DC module (5), the power supply input end of the DC/DC module (5) is connected with the power line clamps CL1 and CL2 after being connected with the working switch QF1 in series, and the DC/DC module (5) supplies power to the radiator (6) at the same time;
the wire inlet end of the resistance adjusting device (3) is connected with the wire clamp CL1 after being connected with the working switch QF1 in series, and the wire outlet end of the resistance adjusting device (3) is connected with the wire clamp CL2 after being connected with the working switch QF1 in series;
the bus end of the transition plate of the storage battery pack (1) is connected with the direct current bus after being sequentially connected with the fuse FU and the bus isolating switch QF2 in series, a storage battery voltmeter V1 is connected in parallel to a connecting line between the fuse FU and the bus isolating switch QF2, and a bus voltmeter V2 is connected in parallel to the direct current bus.
2. The substation direct current system storage battery connection detection device of claim 1, characterized in that: the wire inlet end of the resistance adjusting device (3) is connected with the fixed end of the gear switch, the movable end of the gear switch can be connected with one end of a four-way resistor R1-R4, and the other ends of the resistors R1-R4 are connected with corresponding gear indicator lamps L1-L4 in series and then are connected with the wire outlet end of the adjusting device (3) respectively.
3. The substation direct current system storage battery connection detection device of claim 2, characterized in that: the resistors R1, R2, R3 and R4 in the resistor adjusting device (3) are specifically corrugated resistors, and the resistance value is 200-500 omega.
4. The substation direct current system storage battery connection detection device of claim 3, characterized in that: the input end voltage of the DC/DC module (5) is direct current 220V, the output end voltage is direct current 12V, and working power supplies are respectively provided for the digital display ammeter (4) and the radiator (6).
5. The substation direct current system storage battery connection detection device of claim 4, characterized in that: and the radiator (6) is arranged at the heat radiation port of the resistance adjusting device (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920277066.3U CN209841989U (en) | 2019-03-05 | 2019-03-05 | Transformer substation direct current system storage battery connection detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920277066.3U CN209841989U (en) | 2019-03-05 | 2019-03-05 | Transformer substation direct current system storage battery connection detection device |
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| CN209841989U true CN209841989U (en) | 2019-12-24 |
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| CN201920277066.3U Active CN209841989U (en) | 2019-03-05 | 2019-03-05 | Transformer substation direct current system storage battery connection detection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112531648A (en) * | 2020-10-30 | 2021-03-19 | 国网山东省电力公司烟台供电公司 | Storage battery pack short circuit combined switching protection device and protection method thereof |
| 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 |
| CN113030747A (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 system |
-
2019
- 2019-03-05 CN CN201920277066.3U patent/CN209841989U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112531648A (en) * | 2020-10-30 | 2021-03-19 | 国网山东省电力公司烟台供电公司 | Storage battery pack short circuit combined switching protection device and protection method thereof |
| CN112531648B (en) * | 2020-10-30 | 2023-01-13 | 国网山东省电力公司烟台供电公司 | Storage battery pack short circuit combined switching protection device and protection method thereof |
| 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 |
| CN113030747A (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 system |
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