CN207339277U - A kind of reclosing phase by phase device of 10kV shunt capacitors - Google Patents
A kind of reclosing phase by phase device of 10kV shunt capacitors Download PDFInfo
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- CN207339277U CN207339277U CN201720926665.4U CN201720926665U CN207339277U CN 207339277 U CN207339277 U CN 207339277U CN 201720926665 U CN201720926665 U CN 201720926665U CN 207339277 U CN207339277 U CN 207339277U
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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
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Abstract
The utility model discloses a kind of reclosing phase by phase device of 10kV shunt capacitors, including：Compensation capacitor group, vacuum circuit breaker, operating mechanism, electric discharge device, voltage detecting circuit, synchronous switch controller.Synchronous switch controller includes first voltage comparison module, second voltage comparison module, micro-control module.When capacitor makees reactive-load compensation, first drive a wherein phase breaker closing, then remaining two are respectively compared and treats whether combined floodgate phase voltage and combined floodgate phase voltage are equal, when certain when combined floodgate lock phase voltage with combined floodgate phase voltage is equal when, the second phase breaker closing is driven, A, B, C phase breaker closing are then being driven after the time interval of 90 degree of phase angle displacements of power frequency.For the utility model using three-phase combined floodgate individual-phase control strategy successively, control accuracy is to be closed a floodgate at the same time using two-phase twice of individual-phase control strategy, effectively reduces influence of the overcurrent overvoltage to capacitor.
Description
Technical field
It the utility model is related to a kind of reclosing phase by phase device of 10kV shunt capacitors.
Background technology
Reactive power compensator is compensated using capacitor mostly used by substation, is needed during capacitor compensation
Whether switching is needed according to load judgment.The device of switched capacitor is exactly breaker, so breaker is the idle benefit of capacitor
Repay the device certainly existed in system.The Circuit Breaker Switching mode being currently in operation largely once is closed a floodgate using three-phase,
There are some to use breakers of reclosing phase by phase, but the combined floodgate strategy used for ought wherein two-phase equal moment combined floodgate, Ran Houzai
Combined floodgate third phase.Due to needing to control the two-phase voltage equal moment to close a floodgate at the same time, the scope of control accuracy will be enlarged by 2 times, i.e., smart
Degree reduces half.
Utility model content
For overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of point of 10kV shunt capacitors
Phase closing device, the device can improve combined floodgate precision, reduce influence of the overcurrent overvoltage to capacitor.
The utility model is to solve the technical solution that its technical problem uses to be：
A kind of reclosing phase by phase device of 10kV shunt capacitors, including：Compensation capacitor group, including A, B, C phase in parallel
Capacitor；Vacuum circuit breaker, including A, B, C phase being connected between corresponding A, B, C phase busbar and A, B, C phase capacitor are broken
Road device；A, B, C phase operating mechanism for corresponding driving A, B, C phase breaker closing；Electric discharge device, it connects A, B, C phase and breaks
Corresponding contact between road device and A, B, C phase capacitor；Voltage detecting circuit, for detecting A, B, C phase voltage；Synchro switch control
Device processed, including first voltage comparison module, second voltage comparison module, micro-control module；The voltage detecting circuit is wherein
The voltage output of one phase is connected to first voltage comparison module, the reference voltage input terminal of second voltage comparison module, voltage inspection
The voltage output of the other two-phase of slowdown monitoring circuit connects the voltage to be measured of first voltage comparison module, second voltage comparison module respectively
Input terminal, the first voltage comparison module, the output terminal of second voltage comparison module are connected to the input terminal of micro-control module；
Output terminal output A, B, C phase of the micro-control module closes a floodgate drive signal to the closing coil of each phase operating mechanism, and described
Micro-control module is built-in with timer.
Further, the micro-control module is connected with power frequency detection circuit.
Further, the operating mechanism uses permanent-magnet manipulating mechanism.
Further, A, B, C phase capacitor star-like connection.
Further, the electric discharge device is provided with the discharge examination module for detecting electric discharge device state, described to put
Electro-detection module connects the input terminal of micro-control module.
Further, A, B, C phase breaker is provided with circuit-breaker status detection module, the circuit-breaker status detection
Module connects micro-control module input terminal.
The beneficial effects of the utility model are：A kind of reclosing phase by phase dress of 10kV shunt capacitors provided by the utility model
Put, when capacitor makees reactive-load compensation, first pass through a micro-control module driving wherein phase breaker closing, then by first,
Second voltage comparison module is respectively compared remaining two and treats whether combined floodgate phase voltage and combined floodgate phase voltage are equal, when certain waits to close
Lock lock phase voltage is with when combined floodgate phase voltage is equal, exporting trigger signal to micro-control module, to drive the second phase breaker to close
Lock, is then driving A, B, C phase breaker closing after the time interval of 90 degree of phase angle displacements of power frequency.The present invention uses
Three-phase combined floodgate individual-phase control strategy successively, control accuracy are to be closed a floodgate at the same time using two-phase twice of individual-phase control strategy, are effectively subtracted
Few influence of the overcurrent overvoltage to capacitor.
Brief description of the drawings
Fig. 1 is the module frame chart of the reclosing phase by phase device of the 10kV shunt capacitors of the utility model；
Fig. 2 is the circuit diagram of the voltage detecting circuit of the utility model；
Fig. 3 is the schematic block circuit diagram of the synchronous switch controller of the utility model；
Fig. 4 is the three-phase main-frequency alternating voltage waveform figure of the utility model.
Embodiment
Refer to Fig. 1, a kind of reclosing phase by phase device of 10kV shunt capacitors of the utility model, including：Compensating electric capacity
Device group, vacuum circuit breaker, operating mechanism, electric discharge device, voltage detecting circuit, synchronous switch controller.
The compensation capacitor group includes A, B, C phase capacitor in parallel, and A, B, C phase phase capacitor are star-like connection.
The vacuum circuit breaker includes A, B, C phase being connected between corresponding A, B, C phase busbar and A, B, C phase capacitor
Breaker.
The operating mechanism uses permanent-magnet manipulating mechanism, and A, B, C phase for corresponding driving A, B, C phase breaker closing are grasped
Motivation structure.In other embodiments, the operating mechanism can also use electromagnetic operating mechanism, spring operating mechanism.
Corresponding contact between electric discharge device connection A, B, C phase breaker and A, B, C phase capacitor.
The voltage detecting circuit is used to detect A, B, C phase voltage.Fig. 2 is referred to, it is provided in this embodiment a kind of preferred
Voltage detecting circuit, including A phases, B phases and C phase voltage detection circuits, voltage detecting circuit structure is identical described in three-phase, wraps
Include voltage transformer, operational amplifier, amplification resistance, phase compensating circuit, biasing circuit, low-pass filter, the voltage detecting
Ac voltage signal can be converted into the square-wave signal with phase with frequency by circuit, to access follow-up synchronous switch controller.Need
Illustrate, the particular circuit configurations of the utility model not stop voltage detection circuit, as long as it can reach three-phase main-frequency exchange
The purpose of voltage detecting is all applied in well-behaved phase closing device.
The synchronous switch controller includes first voltage comparison module, second voltage comparison module, micro-control module.Institute
The voltage output for stating a wherein phase for voltage detecting circuit is connected to first voltage comparison module, the ginseng of second voltage comparison module
Voltage input end is examined, the voltage output of the other two-phase of voltage detecting circuit connects first voltage comparison module, the second electricity respectively
Press the voltage input end to be measured of comparison module, the output terminal connection of the first voltage comparison module, second voltage comparison module
To the input terminal of micro-control module.
Specifically, first voltage comparison module, second voltage comparison module have identical structure, refer to Fig. 3, this reality
Apply example and a kind of preferable voltage comparison module structure is provided, respectively including voltage comparator, edging trigger circuit, voltage detecting electricity
The positive input of the A phase voltages output access first voltage comparison module on road and the voltage comparator of second voltage comparison module
End, the reverse input end access B phase voltage outputs of the voltage comparator of first voltage comparison module, second voltage comparison module
The reverse input end access C phase voltage outputs of voltage comparator.By two comparators be respectively compared B phases and C phase voltages whether with A
Phase voltage is equal, and when B phases or C phase voltages are equal with A phase voltages, corresponding comparator output signal redirects, and passes through edging trigger
The rise/fall edge that electric circuit inspection comparator output signal redirects, and trigger signal is exported to micro-control module.
Output terminal output A, B, C phase of the micro-control module closes a floodgate drive signal to the closing line of each phase operating mechanism
Circle, to control each phase operating mechanism to perform closing operation.And the micro-control module is built-in with timer, for exporting timing control
Signal processed is to perform third phase closing operation.
Fig. 4 is referred to, the reclosing phase by phase device of the present embodiment is located at moment t when capacitor makees reactive-load compensation1=
0.205s, micro-control module first export A phases close a floodgate drive signal to A phases operating mechanism control breaker closing；Then is passed through
First, second voltage comparison module is respectively compared B phases and whether C phase voltages are equal with A phase voltages, in t2=0.207s moment, C
When mutually equal with the phase voltage of A phases, second voltage comparison module exports trigger signal to micro-control module, to drive C phases breaking
Device closes a floodgate；Then after 5ms (being 90 degree of phase delays in power frequency system), i.e. t3=0.212s moment, the phase voltage of B phases
Just zero crossing, and the also just zero passage of neutral point voltage at this time, drive B phase breaker closings at this time.
The micro-control module is connected with power frequency detection circuit, to detect the frequency of power frequency ac voltage signal, Ran Hougen
The time interval at the 90 degree of phase angles of frequency conversion calculation obtained according to measurement.
The electric discharge device is provided with the discharge examination module for detecting electric discharge device state, the discharge examination module
The input terminal of micro-control module is connected, passes through discharge examination module monitors electric discharge device state.
A, B, C phase breaker is provided with circuit-breaker status detection module, the circuit-breaker status detection module connection
Micro-control module input terminal, A, B, C phase circuit breaker switch state are monitored by circuit-breaker status detection module.
Certainly, the above description is not intended to limit the present invention, and the utility model is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made in the essential scope of the utility model, also should
Belong to the scope of protection of the utility model.
Claims (6)
- A kind of 1. reclosing phase by phase device of 10kV shunt capacitors, it is characterised in that including：Compensation capacitor group, including A, B, C phase capacitor in parallel；Vacuum circuit breaker, including A, B, C the phase breaker being connected between corresponding A, B, C phase busbar and A, B, C phase capacitor；A, B, C phase operating mechanism for corresponding driving A, B, C phase breaker closing；Electric discharge device, it connects corresponding contact between A, B, C phase breaker and A, B, C phase capacitor；Voltage detecting circuit, for detecting A, B, C phase voltage；Synchronous switch controller, including first voltage comparison module, second voltage comparison module, micro-control module；The voltage output of a wherein phase for the voltage detecting circuit is connected to first voltage comparison module, second voltage compares mould The reference voltage input terminal of block, the voltage output of the other two-phase of voltage detecting circuit connect respectively first voltage comparison module, The voltage input end to be measured of second voltage comparison module, the output of the first voltage comparison module, second voltage comparison module End is connected to the input terminal of micro-control module；Output terminal output A, B, C phase of the micro-control module closes a floodgate drive signal to the closing coil of each phase operating mechanism, and The micro-control module is built-in with timer.
- A kind of 2. reclosing phase by phase device of 10kV shunt capacitors according to claim 1, it is characterised in that：The micro-control Molding block is connected with power frequency detection circuit.
- A kind of 3. reclosing phase by phase device of 10kV shunt capacitors according to claim 1, it is characterised in that：The actuating Mechanism uses permanent-magnet manipulating mechanism.
- A kind of 4. reclosing phase by phase device of 10kV shunt capacitors according to claim 1, it is characterised in that：The A, B, C phase capacitor star-like connections.
- A kind of 5. reclosing phase by phase device of 10kV shunt capacitors according to claim 1, it is characterised in that：The electric discharge Device is provided with the discharge examination module for detecting electric discharge device state, the discharge examination module connection micro-control module Input terminal.
- A kind of 6. reclosing phase by phase device of 10kV shunt capacitors according to claim 1, it is characterised in that：The A, B, C phase breakers are provided with circuit-breaker status detection module, and the circuit-breaker status detection module connects micro-control module input terminal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720926665.4U CN207339277U (en) | 2017-07-27 | 2017-07-27 | A kind of reclosing phase by phase device of 10kV shunt capacitors |
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|---|---|---|---|
| CN201720926665.4U CN207339277U (en) | 2017-07-27 | 2017-07-27 | A kind of reclosing phase by phase device of 10kV shunt capacitors |
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| CN207339277U true CN207339277U (en) | 2018-05-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109038595A (en) * | 2018-06-29 | 2018-12-18 | 北方工业大学 | The low appearance of one kind/low anti-flexible fling-cut system and its control method |
| CN111654026A (en) * | 2020-06-12 | 2020-09-11 | 国网重庆市电力公司电力科学研究院 | Ultra-high voltage parallel capacitor transient analysis method and device and storage medium |
| CN111884233A (en) * | 2020-07-06 | 2020-11-03 | 武汉理工大学 | Overcurrent and overvoltage suppression system for parallel capacitor |
| CN117410129A (en) * | 2023-10-26 | 2024-01-16 | 武汉大学 | Accurate phase control closing device of parallel compensation capacitor bank based on fast switch |
-
2017
- 2017-07-27 CN CN201720926665.4U patent/CN207339277U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109038595A (en) * | 2018-06-29 | 2018-12-18 | 北方工业大学 | The low appearance of one kind/low anti-flexible fling-cut system and its control method |
| CN111654026A (en) * | 2020-06-12 | 2020-09-11 | 国网重庆市电力公司电力科学研究院 | Ultra-high voltage parallel capacitor transient analysis method and device and storage medium |
| CN111884233A (en) * | 2020-07-06 | 2020-11-03 | 武汉理工大学 | Overcurrent and overvoltage suppression system for parallel capacitor |
| CN111884233B (en) * | 2020-07-06 | 2024-01-30 | 武汉理工大学 | Overcurrent and overvoltage suppression system for parallel capacitor |
| CN117410129A (en) * | 2023-10-26 | 2024-01-16 | 武汉大学 | Accurate phase control closing device of parallel compensation capacitor bank based on fast switch |
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