CN213279134U - Relay protection device - Google Patents
Relay protection device Download PDFInfo
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- CN213279134U CN213279134U CN202022400364.2U CN202022400364U CN213279134U CN 213279134 U CN213279134 U CN 213279134U CN 202022400364 U CN202022400364 U CN 202022400364U CN 213279134 U CN213279134 U CN 213279134U
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Abstract
The utility model discloses a relay protection device, including measurement return circuit, protection return circuit and control circuit, the measurement return circuit include: A. b, C three-phase current transformers 1LHa, 1LHb, 1LHc, an active watt-hour meter PJ, a reactive watt-hour meter PJR, an ammeter PA, a power factor meter cos phi and a protection device, wherein the protection circuit comprises: A. b, C three-phase current transformers 1LHa, 1LHb, 1LHc and protection devices; the control loop comprises: closing a floodgate return circuit and separating brake return circuit, the utility model discloses satisfied intelligent substation's requirement, realized four distant functions such as telemetering measurement, remote control, remote signaling, remote regulation, the visual display of accident message provides the most reliable foundation for analysis power supply accident reason, and the closely cooperation of overcurrent setting value superior current, time limit has effectively reduced the emergence of power supply system tripping operation accident more.
Description
Technical Field
The utility model relates to an electric power system control technical field, in particular to relay protection device.
Background
At present, GL-15 type inverse time limit overcurrent relays and DL-13 type timing limit overcurrent relays are mostly used for protecting high-voltage switches of mine ground substations, and the GL-15 type inverse time limit overcurrent relays and the DL-13 type timing limit overcurrent relays cannot meet the requirement of realizing remote monitoring of the mine ground substations, and integrate protection, control, measurement and communication, so that a novel relay protection device needs to be provided to meet the requirements of selectivity, quick action, sensitivity and reliability of the relay protection device.
Disclosure of Invention
The utility model aims at: the relay protection device is provided to meet the requirements of selectivity, quick action, sensitivity and reliability of the relay protection device of the mine ground substation.
The technical scheme of the utility model:
a relay protection device comprises a measurement circuit, a protection circuit and a control circuit;
the measurement circuit comprises: A. b, C three-phase current transformers 1LHa, 1LHb, 1LHc, an active watt-hour meter PJ, a reactive watt-hour meter PJR, an ammeter PA, a power factor meter cos phi and a protection device;
one ends of secondary measurement windings 1k 1-1 k2 of the three-phase current transformers 1LHa, 1LHb and 1LHc are all grounded;
the other end of the secondary measurement winding 1k 1-1 k2 of the phase A current transformer 1LHa is connected with an active watt-hour meter PJ, the active watt-hour meter PJR is connected with a reactive watt-hour meter PJR, and the reactive watt-hour meter PJR is connected with a protection device through a current input jack ACn1 of the protection device;
the other end of the secondary measurement winding 1k 1-1 k2 of the B-phase current transformer 1LHb is connected with a power factor meter cos phi, the power factor meter cos phi is connected with an ammeter PA, and the ammeter PA is connected with a protection device through a current input jack ACn3 of the protection device;
the other end of the secondary measurement winding 1k 1-1 k2 of the C-phase current transformer 1LHc is connected with an active watt-hour meter PJ, the active watt-hour meter PJR is connected with a reactive watt-hour meter PJR, and the reactive watt-hour meter PJR is connected with a protection device through a current input jack ACn5 of the protection device;
a current output loop of the protection device is in short circuit with one end of a secondary measurement winding 1k 1-1 k2 of a three-phase current transformer 1LHa, 1LHb and 1LHc through current output jacks ACn2, ACn4 and ACn6 and is grounded;
the protection circuit comprises: A. b, C three-phase current transformers 1LHa, 1LHb, 1LHc and protection devices;
one ends of secondary protection windings 2k 1-2 k2 of the three-phase current transformers 1LHa, 1LHb and 1LHc are all grounded;
the other end of the secondary protection winding 2k 1-2 k2 of the A-phase current transformer 1LHa is connected with the protection device through a current input jack ACn7 of the protection device;
the other end of the secondary protection winding 2k 1-2 k2 of the B-phase current transformer 1LHb is connected with the protection device through a current input jack ACn9 of the protection device;
the other end of the secondary protection winding 2k 1-2 k2 of the C-phase current transformer 1LHc is connected with the protection device through a current input jack ACn11 of the protection device;
a current output loop of the protection device is in short circuit with one end of a secondary protection winding 2k 1-2 k2 of a three-phase current transformer 1LHa, 1LHb and 1LHc through current output jacks ACn8, ACn10 and ACn12 and is grounded;
the control loop comprises: a closing loop and an opening loop;
the closing circuit includes: the device comprises an air switch 2DK, a position selecting switch KK, a protection device, a breaker normally closed contact 1QF and a closing coil HQ, wherein one end of the air switch 2DK is connected with an alternating current 220V live wire, the other end of the air switch is connected with the position selecting switch KK, the position selecting switch KK is sequentially connected with the protection device, the breaker normally closed contact 1QF-1 and the closing coil HQ, and the closing coil HQ is connected with an alternating current 220V zero line;
the separating brake circuit includes: air switch 2DK, select a position switch KK, protection device, circuit breaker normally open contact 1QF and separating brake coil TQ, exchange 220V live wire is connected to air switch 2DK one end, and select a position switch KK is connected to the other end, selects a position switch KK to connect gradually protection device, circuit breaker normally open contact 1QF-2 and separating brake coil TQ, and separating brake coil TQ connects and exchanges the 220V zero line.
Furthermore, position selecting switch KK includes three pairs of nodes, namely, a node pair, and a node pair ninum.
Furthermore, the control circuit is also provided with connecting pieces 1LP, 2LP and 3LP, and the protection device is put into different protection functions by selecting different connecting pieces.
Furthermore, a low-cycle load shedding device is further arranged in the control loop, one end of the low-cycle load shedding device is connected with the air switch 2DK, and the other end of the low-cycle load shedding device is connected with a protection device.
The circuit comprises a closing indicator light XD1, an opening indicator light XD2 and a protection device, wherein the closing indicator light XD1, the opening indicator light XD2 and the protection device are connected in parallel and then connected into the protection device, and the protection device is connected with a 220V zero line.
The utility model has the advantages that:
the utility model provides a relay protection device has satisfied the requirement of intelligent electric substation, has realized four distant functions such as telemetering measurement, remote control, remote signalling, remote regulation, and the audio-visual display of accident message provides the most reliable foundation for analysis power supply accident reason, and the inseparable cooperation of overcurrent setting value superior current, time limit has effectively reduced the emergence of power supply system tripping operation accident more.
Drawings
FIG. 1 is a schematic diagram of a measurement circuit according to the present invention;
FIG. 2 is a schematic diagram of the protection circuit of the present invention;
fig. 3 is a schematic diagram of a control circuit according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Example 1: as shown in fig. 1 to 3, the utility model provides a relay protection device, which comprises a measurement circuit, a protection circuit and a control circuit;
as shown in fig. 1, the measurement circuit includes: A. b, C three-phase current transformers 1LHa, 1LHb, 1LHc, an active watt-hour meter PJ, a reactive watt-hour meter PJR, an ammeter PA, a power factor meter cos phi and a protection device;
one ends of secondary measurement windings 1k 1-1 k2 of the three-phase current transformers 1LHa, 1LHb and 1LHc are all grounded;
the other end of the secondary measurement winding 1k 1-1 k2 of the phase A current transformer 1LHa is connected with an active watt-hour meter PJ, the active watt-hour meter PJR is connected with a reactive watt-hour meter PJR, and the reactive watt-hour meter PJR is connected with a protection device through a current input jack ACn1 of the protection device;
the other end of the secondary measurement winding 1k 1-1 k2 of the B-phase current transformer 1LHb is connected with a power factor meter cos phi, the power factor meter cos phi is connected with an ammeter PA, and the ammeter PA is connected with a protection device through a current input jack ACn3 of the protection device;
the other end of the secondary measurement winding 1k 1-1 k2 of the C-phase current transformer 1LHc is connected with an active watt-hour meter PJ, the active watt-hour meter PJR is connected with a reactive watt-hour meter PJR, and the reactive watt-hour meter PJR is connected with a protection device through a current input jack ACn5 of the protection device;
a current output loop of the protection device is in short circuit with one end of a secondary measurement winding 1k 1-1 k2 of a three-phase current transformer 1LHa, 1LHb and 1LHc through current output jacks ACn2, ACn4 and ACn6 and is grounded;
as shown in fig. 2, the protection circuit includes: A. b, C three-phase current transformers 1LHa, 1LHb, 1LHc and protection devices;
one ends of secondary protection windings 2k 1-2 k2 of the three-phase current transformers 1LHa, 1LHb and 1LHc are all grounded;
the other end of the secondary protection winding 2k 1-2 k2 of the A-phase current transformer 1LHa is connected with the protection device through a current input jack ACn7 of the protection device;
the other end of the secondary protection winding 2k 1-2 k2 of the B-phase current transformer 1LHb is connected with the protection device through a current input jack ACn9 of the protection device;
the other end of the secondary protection winding 2k 1-2 k2 of the C-phase current transformer 1LHc is connected with the protection device through a current input jack ACn11 of the protection device;
a current output loop of the protection device is in short circuit with one end of a secondary protection winding 2k 1-2 k2 of a three-phase current transformer 1LHa, 1LHb and 1LHc through current output jacks ACn8, ACn10 and ACn12 and is grounded;
as shown in fig. 3, the control loop includes: a closing loop and an opening loop;
the closing circuit includes: the device comprises an air switch 2DK, a position selecting switch KK, a protection device, a breaker normally closed contact 1QF and a closing coil HQ, wherein one end of the air switch 2DK is connected with an alternating current 220V live wire, the other end of the air switch is connected with the position selecting switch KK, the position selecting switch KK is sequentially connected with the protection device, the breaker normally closed contact 1QF-1 and the closing coil HQ, and the closing coil HQ is connected with an alternating current 220V zero line;
the separating brake circuit includes: air switch 2DK, select a position switch KK, protection device, circuit breaker normally open contact 1QF and separating brake coil TQ, exchange 220V live wire is connected to air switch 2DK one end, and select a position switch KK is connected to the other end, selects a position switch KK to connect gradually protection device, circuit breaker normally open contact 1QF-2 and separating brake coil TQ, and separating brake coil TQ connects and exchanges the 220V zero line.
Furthermore, position selecting switch KK includes three pairs of nodes, namely, a node pair, and a node pair ninum.
Furthermore, the control circuit is also provided with connecting pieces 1LP, 2LP and 3LP, and the protection device is put into different protection functions by selecting different connecting pieces.
Furthermore, a low-cycle load shedding device is further arranged in the control loop, one end of the low-cycle load shedding device is connected with the air switch 2DK, the other end of the low-cycle load shedding device is connected with a protection device and used for monitoring the frequency of the power system, and corresponding loads can be cut off according to a preset scheme, so that power generation and power utilization in the mine high-voltage station are in a basic balance state.
The circuit comprises a switching-on indicator light XD1, a switching-off indicator light XD2 and a protection device, wherein the switching-on indicator light XD1, the switching-off indicator light XD2 and the protection device are connected in parallel and then connected into the protection device, the protection device is connected with a 220V zero line, and the switching-off indicator light is used for indicating the switching-on and switching-off state of the switching-on and switching-off circuit.
The protection device WXH-323A/01L type protection device meets the requirements of an intelligent substation, realizes four remote functions of remote measurement, remote control, remote signaling, remote regulation and the like, visually displays accident messages, provides the most reliable basis for analyzing the reasons of power supply accidents, and closely matches the upper-level current and the lower-level current with the time limit of an over-current setting value, thereby effectively reducing the occurrence of the override trip accidents of a power supply system, laying a solid foundation for promoting the comprehensive informatization of a lunar field mine and winning time for automation and people reduction.
The parts of the present invention not described in detail are the known techniques of those skilled in the art. Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (5)
1. A relay protection device, characterized in that: the device comprises a measurement loop, a protection loop and a control loop; the measurement circuit comprises: A. b, C three-phase current transformers 1LHa, 1LHb, 1LHc, an active watt-hour meter PJ, a reactive watt-hour meter PJR, an ammeter PA, a power factor meter cos phi and a protection device; one ends of secondary measurement windings 1k 1-1 k2 of the three-phase current transformers 1LHa, 1LHb and 1LHc are all grounded;
the other end of the secondary measurement winding 1k 1-1 k2 of the phase A current transformer 1LHa is connected with an active watt-hour meter PJ, the active watt-hour meter PJR is connected with a reactive watt-hour meter PJR, and the reactive watt-hour meter PJR is connected with a protection device through a current input jack ACn1 of the protection device;
the other end of the secondary measurement winding 1k 1-1 k2 of the B-phase current transformer 1LHb is connected with a power factor meter cos phi, the power factor meter cos phi is connected with an ammeter PA, and the ammeter PA is connected with a protection device through a current input jack ACn3 of the protection device;
the other end of the secondary measurement winding 1k 1-1 k2 of the C-phase current transformer 1LHc is connected with an active watt-hour meter PJ, the active watt-hour meter PJR is connected with a reactive watt-hour meter PJR, and the reactive watt-hour meter PJR is connected with a protection device through a current input jack ACn5 of the protection device;
a current output loop of the protection device is in short circuit with one end of a secondary measurement winding 1k 1-1 k2 of a three-phase current transformer 1LHa, 1LHb and 1LHc through current output jacks ACn2, ACn4 and ACn6 and is grounded;
the protection circuit comprises: A. b, C three-phase current transformers 1LHa, 1LHb, 1LHc and protection devices;
one ends of secondary protection windings 2k 1-2 k2 of the three-phase current transformers 1LHa, 1LHb and 1LHc are all grounded;
the other end of the secondary protection winding 2k 1-2 k2 of the A-phase current transformer 1LHa is connected with the protection device through a current input jack ACn7 of the protection device;
the other end of the secondary protection winding 2k 1-2 k2 of the B-phase current transformer 1LHb is connected with the protection device through a current input jack ACn9 of the protection device;
the other end of the secondary protection winding 2k 1-2 k2 of the C-phase current transformer 1LHc is connected with the protection device through a current input jack ACn11 of the protection device;
a current output loop of the protection device is in short circuit with one end of a secondary protection winding 2k 1-2 k2 of a three-phase current transformer 1LHa, 1LHb and 1LHc through current output jacks ACn8, ACn10 and ACn12 and is grounded;
the control loop comprises: a closing loop and an opening loop;
the closing circuit includes: the air switch 2DK, the position selection switch KK, the protection device, the normally closed contact 1QF of the circuit breaker and the closing coil HQ, one end of the air switch 2DK is connected with an alternating current 220V live wire, the other end of the air switch is connected with the position selection switch KK, the position selection switch KK is sequentially connected with the protection device, the normally closed contact 1QF-1 of the circuit breaker and the closing coil HQ, and the closing coil HQ is connected with the alternating current 220V zero line;
the separating brake circuit includes: air switch 2DK, select a position switch KK, protection device, circuit breaker normally open contact 1QF and separating brake coil TQ, exchange 220V live wire is connected to air switch 2DK one end, and select a position switch KK is connected to the other end, selects a position switch KK to connect gradually protection device, circuit breaker normally open contact 1QF-2 and separating brake coil TQ, and separating brake coil TQ connects and exchanges the 220V zero line.
2. The relay protection device of claim 1, wherein: and the position selecting switch KK comprises three pairs of nodes.
3. The relay protection device of claim 1, wherein: the control loop is also provided with connecting pieces 1LP, 2LP and 3LP, and the protection device is enabled to be put into different protection functions by selecting different connecting pieces.
4. The relay protection device of claim 1, wherein: the control loop is also provided with a low-cycle load shedding device, one end of the low-cycle load shedding device is connected with the air switch 2DK, and the other end of the low-cycle load shedding device is connected with the protection device.
5. The relay protection device of claim 1, wherein: the indicating circuit comprises a closing indicating lamp XD1, an opening indicating lamp XD2 and a protection device, wherein the closing indicating lamp XD1, the opening indicating lamp XD2 and the protection device are connected in parallel and then are connected into the protection device, and the protection device is connected with a 220V zero line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022400364.2U CN213279134U (en) | 2020-10-26 | 2020-10-26 | Relay protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022400364.2U CN213279134U (en) | 2020-10-26 | 2020-10-26 | Relay protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213279134U true CN213279134U (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022400364.2U Active CN213279134U (en) | 2020-10-26 | 2020-10-26 | Relay protection device |
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| Country | Link |
|---|---|
| CN (1) | CN213279134U (en) |
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2020
- 2020-10-26 CN CN202022400364.2U patent/CN213279134U/en active Active
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