CN203574379U - Segregated-phase synchronized switching control device - Google Patents
Segregated-phase synchronized switching control device Download PDFInfo
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- CN203574379U CN203574379U CN201320666260.3U CN201320666260U CN203574379U CN 203574379 U CN203574379 U CN 203574379U CN 201320666260 U CN201320666260 U CN 201320666260U CN 203574379 U CN203574379 U CN 203574379U
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- circuit breaker
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- permanent magnet
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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 relates to a segregated-phase synchronized switching control device which comprises the components of: a vacuum permanent-magnet circuit breaker, a current transformer set, a reactor set, a capacitor set, an electric network voltage synchronous signal detector, an AB phase switching on/off coil driver, an AB phase operating unit, a C phase switching on/off coil driver and a C phase operating unit. The segregated-phase synchronized switching control device provided by the utility model effectively controls switching inrush current and opening overvoltage through switching a capacitor set at a reference voltage zero-crossing point of the electric network. The segregated-phase synchronized switching control device can prevent larger switching inrush current and opening overvoltage generated in using a traditional three-phase circuit breaker or a three-phase vacuum contactor for switching the capacitor set.
Description
Technical field
The utility model relates to transforming plant voltage reactive comprehensive automation compensation field, is specifically related to switching control device.
Background technology
Capacitor is as a kind of important reactive apparatus, in the voltage-regulation of electric power system and power factor regulation, reduction line loss and filtering harmonic wave, has all been used widely.At present, the switching of capacitor group is usually usingd three-phase breaker or three-phase vacuum contactor as console switch, adopts this capacitor group switching mode unavoidably when capacitor closes a floodgate, can produce and shove more greatly and overvoltage.All the time; this transient process does not cause people's concern; because generally; Overvoltage Amplitude is less than the setting value of those absorption protective device; yet in recent years; along with the application of a large amount of power electronic equipments, user has higher requirement to the quality of power supply, and the overvoltage producing while it is found that capacitor group input coefficient can cause the mistrip of some speed-adjustable driving devices.Meanwhile, shove and also easily capacitor, switchgear etc. is caused damage, when serious, may threaten power equipment safety operation.Transient process when capacitor drops into has caused increasing attention.
Shove the harm causing is as follows:
(1) cause the damage of fling-cut switch
Switching current sharply rises, and when serious, will produce very large electric current, and its frequency of oscillation is high in addition, makes the switch very large mechanical stress of inner generation and vibrations, causes the contact melting welding of fling-cut switch, burns.
(2) cause the damage of capacitor
Actual measurement data shows: the inrush phenomenon of electric capacity is 4-15 times of electric capacity rated current, and its frequency of oscillation is 250-400Hz, and electric capacity combined floodgate generation overvoltage is about 2-3 times of phase voltage.
(3) electric power producing of shoving may make other damage parts, also may cause insulation harm to series reactor.
What transformer station's deciliter capacitor group generally adopted is circuit breaker or the vacuum contactor of conventional springs operating structure, its divide-shut brake action relies on machine driving completely, parts sum is many, transmission, rotatable parts are many, and there is mechanical wear in separating brake action repeatedly, switch motion is long interval time, and the life-span is short, cannot tackle the demand of capacitor group frequent switching.
Utility model content
The purpose of this utility model is to propose a kind of minute synchronised switching control device, it can overcome while adopting three-phase breaker or three-phase vacuum contactor opening-closing capacitor bank and produces excessive inrush phenomenon and gate-dividing super-voltage, thereby avoids the infringement of the system equipment that brings thus.
In order to achieve the above object, the technical scheme that the utility model adopts is as follows:
Minute synchronised switching control device, it comprises vacuum permanent magnet circuit breaker, current transformer group, Reactor banks, capacitor group, for according to the line voltage synchronized signal detector, AB phase divide-shut brake coil actuator, AB phase operating unit, C phase divide-shut brake coil actuator and the C phase operating unit that obtain postponing in described zero crossing position sending the switching time of switching pulse the fixedly operate time of the zero crossing of the reference voltage of electrical network and vacuum permanent magnet circuit breaker; Electrical network, vacuum permanent magnet circuit breaker, current transformer group, Reactor banks and capacitor group are connected in series successively; Line voltage synchronized signal detector is connected with electrical network; Wherein,
Described line voltage synchronized signal detector, for receiving operating passing zero signal and at switching time output drive signal;
Described AB phase divide-shut brake coil actuator, drives signal and exports the congenial feeling the pulse punching of AB for receiving;
Described AB phase operating unit, rushes and drives A phase actuation coil and the B phase actuation coil of vacuum permanent magnet circuit breaker for receiving the congenial feeling the pulse of AB;
Described C phase divide-shut brake coil actuator, drives signal and exports the congenial feeling the pulse punching of C for receiving;
Described C phase operating unit, rushes and drives the C phase actuation coil of vacuum permanent magnet circuit breaker for receiving the congenial feeling the pulse of C.
Preferably, a described minute synchronised switching control device also comprises capacitor group relaying protection detector; Described capacitor group relaying protection detector, the reference voltage signal that the current signal gathering for received current instrument transformer group and line voltage synchronized signal detector gather, described current signal and default current threshold are compared, described reference voltage signal and default voltage threshold are compared, if current signal is more than or equal to current threshold or reference voltage signal is more than or equal to voltage threshold, export sub-gate signal; Described AB phase divide-shut brake coil actuator, also for receiving sub-gate signal and exporting the pulse of AB phase separating brake; Described AB phase operating unit, also for receiving the separating brake pulse of AB phase and driving A phase actuation coil and the B phase actuation coil of vacuum permanent magnet circuit breaker; Described C phase divide-shut brake coil actuator, also for receiving sub-gate signal and exporting the pulse of C phase separating brake; Described C phase operating unit, also for receiving the separating brake pulse of C phase and driving the C phase actuation coil of vacuum permanent magnet circuit breaker.
The utlity model has following beneficial effect:
By the reference voltage zero crossing opening-closing capacitor bank at electrical network, effectively control inrush phenomenon and gate-dividing super-voltage.The larger inrush phenomenon and the gate-dividing super-voltage that while using three-phase breaker or three-phase vacuum contactor opening-closing capacitor bank with respect to tradition, produce, the utility model has good control action to the two, has protected thus the various device in using electricity system.
Accompanying drawing explanation
Fig. 1 is the structural representation of minute synchronised switching control device of the utility model preferred embodiment;
Fig. 2 is switching time diagram.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the utility model is described further.
As shown in Figure 1; a minute synchronised switching control device, it comprises vacuum permanent magnet circuit breaker ISM, current transformer group, Reactor banks, capacitor group, for according to the line voltage synchronized signal detector, AB phase divide-shut brake coil actuator, AB phase operating unit CM-AB, C phase divide-shut brake coil actuator, C phase operating unit CM-C and the capacitor group relaying protection detector that obtain postponing in described zero crossing position sending the switching time of switching pulse the fixedly operate time of the zero crossing of the reference voltage of electrical network and vacuum permanent magnet circuit breaker ISM.Electrical network, vacuum permanent magnet circuit breaker, current transformer group, Reactor banks and capacitor group are connected in series successively; Line voltage synchronized signal detector is connected with electrical network.Electrical network has A, B, C phase, and therefore, current transformer group, Reactor banks, capacitor group also have respectively three, are connected to three-phase, and this is same as the prior art, repeats no more.
Described line voltage synchronized signal detector, for receiving operating passing zero signal and at switching time output drive signal;
Described AB phase divide-shut brake coil actuator, drives signal and exports the congenial feeling the pulse punching of AB for receiving;
Described AB phase operating unit, rushes and drives A phase actuation coil and the B phase actuation coil of vacuum permanent magnet circuit breaker for receiving the congenial feeling the pulse of AB;
Described C phase divide-shut brake coil actuator, drives signal and exports the congenial feeling the pulse punching of C for receiving;
Described C phase operating unit, rushes and drives the C phase actuation coil of vacuum permanent magnet circuit breaker for receiving the congenial feeling the pulse of C.
Described capacitor group relaying protection detector, the reference voltage signal that the current signal gathering for received current instrument transformer group and line voltage synchronized signal detector gather, described current signal and default current threshold are compared, described reference voltage signal and default voltage threshold are compared, if current signal is more than or equal to current threshold or reference voltage signal is more than or equal to voltage threshold, export sub-gate signal; Described AB phase divide-shut brake coil actuator, also for receiving sub-gate signal and exporting the pulse of AB phase separating brake; Described AB phase operating unit, also for receiving the separating brake pulse of AB phase and driving A phase actuation coil and the B phase actuation coil of vacuum permanent magnet circuit breaker; Described C phase divide-shut brake coil actuator, also for receiving sub-gate signal and exporting the pulse of C phase separating brake; Described C phase operating unit, also for receiving the separating brake pulse of C phase and driving the C phase actuation coil of vacuum permanent magnet circuit breaker.
As shown in Figure 2, being described as follows of switching time:
A point sends a little for any switching order; B point sends the reference voltage zero crossing of rear judgement for line voltage synchronized signal detector according to operating passing zero signal; C point sends a little for switching pulse, and vacuum permanent magnet circuit breaker receives after switching pulse, starts action; D point is vacuum permanent magnet circuit breaker release point, and time period CD is the intrinsic operate time of vacuum permanent magnet circuit breaker.As require vacuum permanent magnet circuit breaker in the action of reference voltage zero crossing place, i.e. D point action.Time period BC adds that time period CD necessarily equals the integral multiple of the sinusoidal wave half-wave of reference voltage.As shown in Figure 2, time period CD to hemiwave time algebraically remainder after, add that time period BC necessarily equals hemiwave time.From analyzing, time period BC is that line voltage synchronized signal detector has been the time that zero delay sends switching pulse, is also the best opportunity of vacuum permanent magnet circuit breaker operating passing zero.Vacuum permanent magnet circuit breaker intrinsic time section CD and reference voltage frequency all can be calculated gained by line voltage synchronized signal detector.
The course of work of the present embodiment is as follows:
Vacuum permanent magnet circuit breaker ISM one end is connected with electrical network A, B, C, and the other end is connected with current transformer group, and series reactor group and capacitor group.Electrical network is adopted A, B, C three-phase voltage into line voltage synchronized signal detector by voltage transformer group (figure does not draw), line voltage U ab is as the reference voltage of input line voltage synchronized signal detector, the zero crossing of line voltage synchronized signal detector judgement reference voltage, and the fixedly operate time of measuring vacuum permanent magnet circuit breaker during according to initialization, calculate the delay of line voltage synchronized signal detector and send the time of switching pulse, that is the best opportunity of operating passing zero capacitor group.Actuation coil KA, the KB of vacuum permanent magnet circuit breaker ISM-A, ISM-B phase disconnecting link contact are in parallel, by AB phase operating unit, CM-AB controls with transistor switch device, and the action situation of auxiliary contact QFA, the QFB series connection reflection AB phase disconnecting link contact after the action of AB phase disconnecting link feeds back to AB phase operating unit CM-AB.The actuation coil KC of ISM-C phase disconnecting link contact, by C phase operating unit, CM-C controls with transistor switch device, and the action situation of the auxiliary contact QFC reflection C phase disconnecting link contact after the action of C phase disconnecting link feeds back to C phase operating unit CM-C.Line voltage synchronized signal detector is received after operating passing zero signal, AB phase divide-shut brake coil actuator sends the time by the delay of line voltage synchronized signal detector zero point, send switching pulse, AB phase operating unit CM-AB receives after pulse, acts on AB phase actuation coil KA, the KB of vacuum permanent magnet circuit breaker ISM; C phase divide-shut brake coil actuator sends the time by the delay of line voltage synchronized signal detector zero point, sends switching pulse, and C phase operating unit CM-C receives after pulse, acts on the C phase actuation coil KC of vacuum permanent magnet circuit breaker ISM.Vacuum permanent magnet circuit breaker completes over-zero action, opening-closing capacitor bank.Current transformer group sampling power network current, with the action foundation of the reference voltage of sampling as capacitor group relaying protection detector.Capacitor group relaying protection detector according to adopt into power network current, voltage, according to the electric current, the voltage protection definite value that pre-set, the capacitor group of operation is monitored and is protected.The electric current detecting in real time or magnitude of voltage reaches or surpass after default setting value, AB phase divide-shut brake coil actuator, C phase divide-shut brake coil actuator are not sent out the pulse of time delay separating brake, but send separating brake pulse action in actuation coil KA, KB, the KC of vacuum permanent magnet circuit breaker ISM simultaneously, ISM-A, ISM-B, ISM-C three-phase disconnecting link are lifted one's head simultaneously action, to reach the effect of timely excision fault.
The capacitor group sequence of movement of the present embodiment is described as follows:
In medium voltate hierarchical system, Shunt Capacitor Unit often adopts isolated neutral Y-connection mode, now capacitor ordering in launching is: at the difference Uab of two phase voltages, be 0 o'clock, drop into the compensation condenser group of this A, B two-phase simultaneously, now C phase voltage Uc is through 90
oafter (being 5ms in 50Hz system), will be zero, be also now the moment of dropping into C phase capacitor group.In like manner, the excision of capacitor is sequentially: when C phase voltage Uc is maximum, cut off the capacitor group of C phase, now two-phase voltage difference U ab is 0, through 90
oafter will become maximum, be also now the moment of excision A, B two-phase capacitor group.
The present embodiment is by accurately detecting reference voltage zero crossing, and according to vacuum permanent magnet circuit breaker inherent delay characteristic, intelligence is proofreaied and correct switching order and sent the time, guarantees the accurate operating passing zero of capacitor group, within error time is controlled at 1ms.Inrush phenomenon and gate-dividing super-voltage that opening-closing capacitor bank produces are all controlled within 2 times.
Vacuum permanent magnet circuit breaker by electromagnetism close a floodgate, permanent magnetism keeps and spring separating brake, has comprehensively realized the good fit of spring operating mechanism and magnetic force operating mechanism and vacuum interrupter, possesses excellent mechanical property and electrical characteristic, can frequent operation; Can adopt the actuating of three-phase independence, and branch wire time dispersion is little, coordinates with a minute synchronised switching controller, can effectively guarantee that the inherent reference voltage zero crossing of reasonable error completes divide-shut brake.
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and distortion all should belong to the protection range of the utility model claim within.
Claims (2)
1. minute synchronised switching control device, it is characterized in that, comprise vacuum permanent magnet circuit breaker, current transformer group, Reactor banks, capacitor group, for according to the line voltage synchronized signal detector, AB phase divide-shut brake coil actuator, AB phase operating unit, C phase divide-shut brake coil actuator and the C phase operating unit that obtain postponing in described zero crossing position sending the switching time of switching pulse the fixedly operate time of the zero crossing of the reference voltage of electrical network and vacuum permanent magnet circuit breaker; Electrical network, vacuum permanent magnet circuit breaker, current transformer group, Reactor banks and capacitor group are connected in series successively; Line voltage synchronized signal detector is connected with electrical network; Wherein,
Described line voltage synchronized signal detector, for receiving operating passing zero signal and at switching time output drive signal;
Described AB phase divide-shut brake coil actuator, drives signal and exports the congenial feeling the pulse punching of AB for receiving;
Described AB phase operating unit, rushes and drives A phase actuation coil and the B phase actuation coil of vacuum permanent magnet circuit breaker for receiving the congenial feeling the pulse of AB;
Described C phase divide-shut brake coil actuator, drives signal and exports the congenial feeling the pulse punching of C for receiving;
Described C phase operating unit, rushes and drives the C phase actuation coil of vacuum permanent magnet circuit breaker for receiving the congenial feeling the pulse of C.
2. as claimed in claim 1 minute synchronised switching control device, is characterized in that, also comprises capacitor group relaying protection detector; Described capacitor group relaying protection detector, the reference voltage signal that the current signal gathering for received current instrument transformer group and line voltage synchronized signal detector gather, described current signal and default current threshold are compared, described reference voltage signal and default voltage threshold are compared, if current signal is more than or equal to current threshold or reference voltage signal is more than or equal to voltage threshold, export sub-gate signal; Described AB phase divide-shut brake coil actuator, also for receiving sub-gate signal and exporting the pulse of AB phase separating brake; Described AB phase operating unit, also for receiving the separating brake pulse of AB phase and driving A phase actuation coil and the B phase actuation coil of vacuum permanent magnet circuit breaker; Described C phase divide-shut brake coil actuator, also for receiving sub-gate signal and exporting the pulse of C phase separating brake; Described C phase operating unit, also for receiving the separating brake pulse of C phase and driving the C phase actuation coil of vacuum permanent magnet circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320666260.3U CN203574379U (en) | 2013-10-24 | 2013-10-24 | Segregated-phase synchronized switching control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320666260.3U CN203574379U (en) | 2013-10-24 | 2013-10-24 | Segregated-phase synchronized switching control device |
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| CN203574379U true CN203574379U (en) | 2014-04-30 |
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| CN201320666260.3U Expired - Fee Related CN203574379U (en) | 2013-10-24 | 2013-10-24 | Segregated-phase synchronized switching control device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304418A (en) * | 2015-09-10 | 2016-02-03 | 陕西宝鼎开关有限公司 | Dedicated main-auxiliary circuit breaker for test station |
| CN111799112A (en) * | 2020-06-09 | 2020-10-20 | 国网山东省电力公司检修公司 | Intelligent phase selection control system and method with dynamic self-adaptive function |
| CN111799113A (en) * | 2020-06-09 | 2020-10-20 | 国网山东省电力公司检修公司 | Intelligent phase selection control system and method with function database storage function |
-
2013
- 2013-10-24 CN CN201320666260.3U patent/CN203574379U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304418A (en) * | 2015-09-10 | 2016-02-03 | 陕西宝鼎开关有限公司 | Dedicated main-auxiliary circuit breaker for test station |
| CN111799112A (en) * | 2020-06-09 | 2020-10-20 | 国网山东省电力公司检修公司 | Intelligent phase selection control system and method with dynamic self-adaptive function |
| CN111799113A (en) * | 2020-06-09 | 2020-10-20 | 国网山东省电力公司检修公司 | Intelligent phase selection control system and method with function database storage function |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140430 Termination date: 20211024 |
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| CF01 | Termination of patent right due to non-payment of annual fee |