CN209896697U - Two-section incoming line shared capacitance compensation device - Google Patents
Two-section incoming line shared capacitance compensation device Download PDFInfo
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- CN209896697U CN209896697U CN201920648869.5U CN201920648869U CN209896697U CN 209896697 U CN209896697 U CN 209896697U CN 201920648869 U CN201920648869 U CN 201920648869U CN 209896697 U CN209896697 U CN 209896697U
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- cabinet
- secondary side
- power supply
- incoming line
- incoming
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The utility model discloses a device for sharing capacitance compensation by two sections of incoming lines, which comprises a first incoming line cabinet, a second incoming line cabinet, a bus connection cabinet and a reactive compensation cabinet internally provided with a capacitance compensation controller, wherein the primary side of the first incoming line cabinet is connected with a main incoming line power supply, and the secondary side of the first incoming line cabinet is connected with the input end of the reactive compensation cabinet; the primary side end of the second incoming cabinet is connected with a standby incoming power supply; two ends of the bus connection cabinet are respectively connected with the input end of the reactive power compensation cabinet and the secondary side end of the second incoming line cabinet; when the secondary side power supply of the second incoming line cabinet is switched to the standby secondary side power supply of the secondary side of the second incoming line cabinet, the sampling current and the secondary side sampling voltage of the capacitance compensation controller come from the standby secondary side power supply of the incoming line. The utility model discloses when satisfying capacitance compensation, reduce cost.
Description
Technical Field
The utility model relates to a low pressure inlet wire capacitance compensation technical field.
Background
Along with the development of social economy, the power supply quality requirement is higher and higher, so the capacitance compensation cabinet can be designed in the design of a low-voltage system, but two sections of incoming lines often appear in practical use, only one section of incoming line power supply is used in daily use, and the other section of incoming line power supply is a standby power supply. Therefore, the capacitance compensation cabinet of the standby power supply section is idle for a long time, which causes waste. If two sections of incoming lines can share one group of capacitance compensation, resource waste can be effectively avoided.
Disclosure of Invention
An object of the utility model is to provide a device of two sections inlet wires sharing capacitance compensation, when satisfying capacitance compensation, reduce cost.
The technical scheme for realizing the purpose is as follows:
a device for sharing capacitance compensation of two sections of incoming lines comprises a first incoming line cabinet as a main incoming line section, a second incoming line cabinet as a standby incoming line section, a bus connection cabinet and a reactive compensation cabinet internally provided with a capacitance compensation controller, wherein,
the primary side of the first incoming cabinet is connected with a main incoming power supply, and the secondary side of the first incoming cabinet is connected with the input end of the reactive power compensation cabinet;
the primary side end of the second incoming cabinet is connected with a standby incoming power supply;
two ends of the bus connection cabinet are respectively connected with the input end of the reactive power compensation cabinet and the secondary side end of the second incoming line cabinet;
when the secondary side power supply is in power failure, the secondary side power supply is switched to the standby inlet wire secondary side power supply generated by the secondary side of the second inlet wire cabinet, and the sampling current and the secondary side sampling voltage of the capacitance compensation controller are from the standby inlet wire secondary side power supply.
Preferably, the apparatus further comprises a sampling current circuit, the sampling current circuit comprising: a first sampling current transformer for collecting the current of the main inlet wire secondary side power supply, a second sampling current transformer for collecting the current of the standby inlet wire secondary side power supply, a first intermediate relay, a second intermediate relay, a first time relay and a second time relay, wherein,
the coils of the first intermediate relay and the first time relay are connected to the main inlet wire secondary side power supply;
the coils of the second intermediate relay and the second time relay are connected to the standby incoming line secondary side power supply through the bus connection cabinet;
the first end of the first sampling current transformer is grounded, and the second end of the first sampling current transformer is sequentially connected with the normally open contact of the first intermediate relay, the normally closed contact of the second intermediate relay and the sampling current output end in series;
the second end of the first sampling current transformer is also grounded through a normally closed contact of the first time relay;
the first end of the second sampling current transformer is grounded, and the second end of the second sampling current transformer is sequentially connected with the normally open contact of the second intermediate relay, the normally closed contact of the first intermediate relay and the sampling current output end in series;
and the second end of the second sampling current transformer is also grounded through a normally closed contact of the second time relay.
Preferably, the apparatus further comprises three secondary side sampling voltage circuits for sampling the secondary side power supply A, B and the C-phase voltage, respectively, each secondary side sampling voltage circuit comprising a third intermediate relay, a fourth intermediate relay, a first circuit breaker and a second circuit breaker, wherein,
the coils of the third intermediate relay and the fourth intermediate relay are connected to the main inlet wire secondary side power supply;
the first end of the first circuit breaker is connected to A, B or C phase of the main inlet wire secondary side power supply, and the second end of the first circuit breaker is connected to a sampling voltage output end through a normally open contact of the third intermediate relay and a normally open contact of the fourth intermediate relay respectively;
the first end of the second circuit breaker is connected into A, B or C phase of the standby incoming line secondary side power supply through the bus connection cabinet, and the second end of the second circuit breaker is connected with the sampling voltage output end through the normally closed contact of the third intermediate relay and the normally closed contact of the fourth intermediate relay respectively.
Preferably, the first incoming line cabinet, the second incoming line cabinet and the bus connection cabinet are switched on and off through a third circuit breaker respectively;
a coil of a third time relay is connected into a circuit of a third circuit breaker of the first incoming cabinet;
a coil of a fourth time relay is connected into a line connecting the bus connection cabinet and the reactive compensation cabinet;
a normally closed contact of the third time relay is connected to a circuit of a third circuit breaker of the bus connection cabinet;
and a normally closed contact of the fourth time relay is connected in series in a circuit of a third circuit breaker of the first incoming line cabinet.
The utility model has the advantages that: the utility model discloses a switch for a set of capacitance compensation of two sections inlet wires sharing improves the requirement of electric energy quality, reduces equipment cost's characteristics simultaneously.
Drawings
Fig. 1 is a schematic diagram of a device for common capacitance compensation of two incoming lines according to the present invention;
FIG. 2 is a circuit diagram of a sampling current circuit according to the present invention;
fig. 3 is a circuit diagram of a secondary side sampling voltage circuit of the phase-a power supply of the utility model.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, the utility model discloses a two sections inlet wires share capacitance compensation's device, including the first inlet wire cabinet 1 as main inlet wire section, the second inlet wire cabinet 2 as reserve inlet wire section, bus tie cabinet 3 and reactive power compensation cabinet 4.
The primary side of the first incoming cabinet 1 is connected with main incoming power supplies L11, L12 and L13, and the secondary side is connected with the input end of the reactive power compensation cabinet 4. The primary side end of the second incoming cabinet 2 is connected with standby incoming power supplies L21, L22, and L23.
The two ends of the bus bar connection cabinet 3 are respectively connected with the input end of the reactive compensation cabinet 4 and the secondary side end of the second incoming line cabinet 2.
In normal operation, the sampling current and the secondary side sampling voltage of the capacitance compensation controller (not shown) in the reactive compensation cabinet 4 are from the primary incoming line secondary side power supplies 1L1, 1L2, 1L3 generated at the secondary side end of the first incoming line cabinet 1, when the primary incoming line secondary side power supplies 1L1, 1L2, 1L3 lose power, the sampling current and the secondary side sampling voltage of the capacitance compensation controller in the reactive compensation cabinet 4 are switched to the standby incoming line secondary side power supplies 2L1, 2L2, 2L3 generated at the secondary side end of the second incoming line cabinet 2, and the sampling current and the secondary side sampling voltage of the capacitance compensation controller in the reactive compensation cabinet 4 are from the standby incoming line secondary side power supplies 2L1, 2L2, 2L3 of the second incoming line cabinet 2. Specifically, as shown in fig. 2 and 3, the sampling current and the secondary side sampling voltage are collected by the sampling current circuit and the secondary side sampling voltage circuit.
The sampling current circuit includes: the device comprises a first sampling current transformer TA1, a second sampling current transformer TA2, a first intermediate relay KA1, a second intermediate relay KA2, a first time relay KT1 and a second time relay KT2, wherein the first sampling current transformer TA1 is used for collecting currents of main incoming line secondary side power supplies 1L1, 1L2 and 1L3, and the second sampling current transformer TA2 is used for collecting currents of standby incoming line secondary side power supplies 2L1, 2L2 and 2L 3.
The coils of the first intermediate relay KA1 and the first time relay KT1 are connected to main inlet line secondary side power supplies 1L1, 1L2 and 1L3 at the secondary side end of the first inlet cabinet 1. The coils of the second intermediate relay KA2 and the second time relay KT2 are connected to standby incoming line secondary side power supplies 2L1, 2L2 and 2L3 at the secondary side end of the second incoming line cabinet 2 through the bus bar connection cabinet 3.
The first end of the first sampling current transformer TA1 is grounded, and the second end is connected in series with the normally open contact of the first intermediate relay KA1, the normally closed contact of the second intermediate relay KA2 and the sampling current output end A4 in sequence. The second terminal of the first sampling current transformer TA1 is also grounded through the normally closed contact of the first time relay KT 1.
The first end of the second sampling current transformer TA2 is grounded, and the second end is connected in series with the normally open contact of the second intermediate relay KA2, the normally closed contact of the first intermediate relay KA1 and the sampling current output end A4 in sequence. The second terminal of the second sampling current transformer TA2 is also grounded through the normally closed contact of the second time relay KT 2.
Thus, when the main incoming line secondary side power supply 1L1, 1L2 and 1L3 are charged, the normally open contact of the first intermediate relay KA1 is closed, the first time relay KT1 is opened in a delayed mode, and therefore the first sampling current transformer TA1 outputs sampling current. Similarly, when the main incoming line secondary side power supply 1L1, 1L2 and 1L3 loses power and the standby incoming line secondary side power supply 2L1, 2L2 and 2L3 are electrified, the normally open contact of the second intermediate relay KA2 is closed, the normally closed contact is opened, and the second time relay KT2 is opened in a delayed mode, so that the second sampling current transformer TA2 outputs sampling current.
The secondary side sampling voltage circuits are three and respectively sample the secondary side power supply A, B and the C phase voltage. Each secondary side sampling voltage circuit includes a third intermediate relay KA3, a fourth intermediate relay KA4, a first circuit breaker FU1, and a second circuit breaker FU 2.
The coils of the third intermediate relay KA3 and the fourth intermediate relay KA4 are respectively connected to main inlet line secondary side power supplies 1L1, 1L2 and 1L 3.
The first end of the first circuit breaker FU1 is connected to A, B or C phase of the main incoming line secondary side power supply 1L1, 1L2 and 1L3, and the second end is connected to the sampling voltage output end through the normally open contact of the third intermediate relay KA3 and the normally open contact of the fourth intermediate relay KA4 respectively.
The first end of the second circuit breaker FU2 is connected to A, B or C phase of the standby incoming line secondary side power supply 2L1, 2L2 and 2L3 of the secondary side end of the second incoming line cabinet 2 through the bus connection cabinet 3, and the second end is connected to the sampling voltage output end through the normally closed contact of the third intermediate relay KA3 and the normally closed contact of the fourth intermediate relay KA 4.
Therefore, by switching, when the main incoming line secondary power supply 1L1, 1L2, 1L3 or the standby incoming line secondary power supply 2L1, 2L2, 2L3 is charged, the sampling voltage output terminal outputs the sampling voltages 3L1, 3L2, 3L 3.
The first incoming cabinet 1, the second incoming cabinet 2 and the busbar interconnecting cabinet 3 are each switched on and off by a third circuit breaker FU3 (shown in fig. 1). The coil of a third time relay (not shown) is connected to the line of the third breaker FU3 of the first inlet cabinet 1. A coil of a fourth time relay (not shown) is connected into a line connecting the bus connection cabinet 3 and the reactive compensation cabinet 4; the normally closed contact of the third time relay is connected to the line of the third circuit breaker FU3 of the busbar cabinet 3. The normally closed contact of the fourth time relay is connected in series in the line of the third circuit breaker FU3 of the first inlet cabinet 1. Therefore, when the reactive power compensation cabinet works normally, the main incoming line power supplies L11, L12 and L13 of the first incoming line cabinet 1 are electrified, the normally closed contact of the third time relay is opened, the bus connection cabinet 3 is disconnected, the normally closed contact of the fourth time relay is closed, and the first incoming line cabinet 1 is communicated with the reactive power compensation cabinet 4. When the main incoming line power supplies L11, L12 and L13 lose power, the normally closed contact of the third time relay is closed, the bus interconnection cabinet 3 is communicated, the second incoming line cabinet 2 is communicated with the reactive power compensation cabinet 4, and the normally closed contact of the fourth time relay is opened.
The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, therefore, all equivalent technical solutions should also belong to the scope of the present invention, and should be defined by the claims.
Claims (4)
1. A device for sharing capacitance compensation of two sections of incoming lines is characterized by comprising a first incoming line cabinet as a main incoming line section, a second incoming line cabinet as a standby incoming line section, a bus connection cabinet and a reactive compensation cabinet internally provided with a capacitance compensation controller, wherein,
the primary side of the first incoming cabinet is connected with a main incoming power supply, and the secondary side of the first incoming cabinet is connected with the input end of the reactive power compensation cabinet;
the primary side end of the second incoming cabinet is connected with a standby incoming power supply;
two ends of the bus connection cabinet are respectively connected with the input end of the reactive power compensation cabinet and the secondary side end of the second incoming line cabinet;
when the secondary side power supply is in power failure, the secondary side power supply is switched to the standby inlet wire secondary side power supply generated by the secondary side of the second inlet wire cabinet, and the sampling current and the secondary side sampling voltage of the capacitance compensation controller are from the standby inlet wire secondary side power supply.
2. The apparatus of claim 1, further comprising a sampling current circuit, the sampling current circuit comprising: a first sampling current transformer for collecting the current of the main inlet wire secondary side power supply, a second sampling current transformer for collecting the current of the standby inlet wire secondary side power supply, a first intermediate relay, a second intermediate relay, a first time relay and a second time relay, wherein,
the coils of the first intermediate relay and the first time relay are connected to the main inlet wire secondary side power supply;
the coils of the second intermediate relay and the second time relay are connected to the standby incoming line secondary side power supply through the bus connection cabinet;
the first end of the first sampling current transformer is grounded, and the second end of the first sampling current transformer is sequentially connected with the normally open contact of the first intermediate relay, the normally closed contact of the second intermediate relay and the sampling current output end in series;
the second end of the first sampling current transformer is also grounded through a normally closed contact of the first time relay;
the first end of the second sampling current transformer is grounded, and the second end of the second sampling current transformer is sequentially connected with the normally open contact of the second intermediate relay, the normally closed contact of the first intermediate relay and the sampling current output end in series;
and the second end of the second sampling current transformer is also grounded through a normally closed contact of the second time relay.
3. The two-stage incoming line common capacitance compensation device of claim 1, further comprising three secondary side sampling voltage circuits for sampling a secondary side power supply A, B and a C-phase voltage, respectively, each secondary side sampling voltage circuit comprising a third intermediate relay, a fourth intermediate relay, a first circuit breaker and a second circuit breaker, wherein,
the coils of the third intermediate relay and the fourth intermediate relay are connected to the main inlet wire secondary side power supply;
the first end of the first circuit breaker is connected to A, B or C phase of the main inlet wire secondary side power supply, and the second end of the first circuit breaker is connected to a sampling voltage output end through a normally open contact of the third intermediate relay and a normally open contact of the fourth intermediate relay respectively;
the first end of the second circuit breaker is connected into A, B or C phase of the standby incoming line secondary side power supply through the bus connection cabinet, and the second end of the second circuit breaker is connected with the sampling voltage output end through the normally closed contact of the third intermediate relay and the normally closed contact of the fourth intermediate relay respectively.
4. The device for common capacitance compensation of two sections of incoming lines according to claim 1, wherein the first incoming line cabinet, the second incoming line cabinet and the bus bar connection cabinet are switched on and off respectively through a third circuit breaker;
a coil of a third time relay is connected into a circuit of a third circuit breaker of the first incoming cabinet;
a coil of a fourth time relay is connected into a line connecting the bus connection cabinet and the reactive compensation cabinet;
a normally closed contact of the third time relay is connected to a circuit of a third circuit breaker of the bus connection cabinet;
and a normally closed contact of the fourth time relay is connected in series in a circuit of a third circuit breaker of the first incoming line cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920648869.5U CN209896697U (en) | 2019-05-07 | 2019-05-07 | Two-section incoming line shared capacitance compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920648869.5U CN209896697U (en) | 2019-05-07 | 2019-05-07 | Two-section incoming line shared capacitance compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209896697U true CN209896697U (en) | 2020-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920648869.5U Expired - Fee Related CN209896697U (en) | 2019-05-07 | 2019-05-07 | Two-section incoming line shared capacitance compensation device |
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| Country | Link |
|---|---|
| CN (1) | CN209896697U (en) |
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2019
- 2019-05-07 CN CN201920648869.5U patent/CN209896697U/en not_active Expired - Fee Related
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Granted publication date: 20200103 |
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| CF01 | Termination of patent right due to non-payment of annual fee |