CN204089004U - A kind of complete power distribution equipment with surge suppression function - Google Patents
A kind of complete power distribution equipment with surge suppression function Download PDFInfo
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- CN204089004U CN204089004U CN201420516106.2U CN201420516106U CN204089004U CN 204089004 U CN204089004 U CN 204089004U CN 201420516106 U CN201420516106 U CN 201420516106U CN 204089004 U CN204089004 U CN 204089004U
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Abstract
The utility model relates to a kind of complete power distribution equipment with surge suppression function, and its main circuit comprises main circuit breaker CB1, bypass breaker CB2 and resistor R; Bypass breaker CB2 and resistor R parallel connection forms parallel branch; Handcart-type main circuit breaker CB1 is series between the input of the parallel branch of bus and bypass breaker CB2 and resistor R, the output terminating load FZ of the parallel branch of bypass breaker CB2 and resistor R.Good effect of the present utility model is: 1. under the prerequisite adequately achieving surge suppression function, take into account the applicability of device, fail safe to greatest extent; 2. the equal accessible site of all parts forms the Novel complete set power distribution equipment of complete set in a metal-enclosed switchgear, the basis that user is dropped in conventional electrical distribution device space just can reach the object of surge suppression with minimum economic cost.
Description
Technical field
The utility model relates to distribution technique field, particularly a kind of complete power distribution equipment with surge suppression function, and the switching being mainly used in power supply and the accumulation energy type load such as field of power distribution transformer or capacitor controls.
Background technology
In power supply and field of power distribution, when dropping into no-load transformer or drop into Capacitor banks, the puzzlement usually can shoved.Transformer excitation flow shoves similar to the charging of capacitor, and inductance and electric capacity are all energy-storage travelling wave tubes, and the former does not allow current break, and the latter does not allow voltage jump, all will face a transient process during air-drop power supply.The root of transformer excitation flow be transformer either side winding experience applied voltage suddenly increase time, based on constant-flux-linkage theorem, this winding will produce unipolar magnetic bias in magnetic circuit, remanent magnetism polarity as just original with transformer in magnetic bias polarity is identical, just may cause saturation effects because of the superposition of magnetic bias, remanent magnetism and stable state magnetic flux, thus significantly reduce the excitation reactance of Transformer Winding, and then bring out the considerable magnetizing inrush current of numerical value, 6 ~ 30 times of its value reachable device rated current Ie, the duration can reach 0.5s or longer.Its harm is: (1) causes the protective relaying device malfunction of transformer, makes the failure again and again that puts into operation of transformer; (2) magnetizing inrush current of transformer station's no-load transformer access power supply generation, bring out the transformer that other transformer stations contiguous are running produce " sympathetic inrush " (sympathetic inrush) and cause mistrip, cause large-area power-cuts; (3) magnetizing inrush current that numerical value is very large can cause transformer and circuit breaker because of electric power excessive impaired; (4) bring out switching overvoltage, damage electric equipment; (5) DC component in magnetizing inrush current causes current transformer magnetic circuit significantly to be reduced the performance factor of certainty of measurement and protective relaying device by excessively magnetizing; (6) a large amount of harmonic waves in magnetizing inrush current cause serious pollution to the electrical network quality of power supply.(7) cause line voltage to rise sharply or rapid drawdown, affect other electric equipments and normally work.
Capacitor drops into and is equivalent to short-circuit condition instantaneously, and produce powerful charging thus and shove, its frequency can reach a few KHz usually, and amplitude can reach stable state power current amplitude nearly a hundred times, within duration 20ms.Its harm is: (1) impacts electric power system, affects quality of voltage; (2) cause electrodynamic repulsion force powerful between device for switching contact, contact burning or melting welding may be caused; (3) conductor distortion, current transformer and capacitor insulation may be caused to damage.
Chinese patent ZL200710009374.X " limitation inrush current push-pull device " also uses the switchgear such as circuit breaker, contactor and suppresses transformer excitation flow by switching resistance, in parallel with circuit breaker again after contactor and resistant series, circuit breaker and contactor are controlled by a control device based on current detecting, the shortcoming of the program is: (1) considers operation maintenance security needs, by its each component integration in a metal-enclosed switchgear, the applicability of device can not be sacrificed to a great extent; (2) its control device relies on current monitor signal completely and self regularly controls the action of circuit breaker and contactor, resistance likely can be caused to burn, affect the fail safe of device when current detection signal fault.
Utility model content
The purpose of this utility model is to provide a kind of complete power distribution equipment with surge suppression function, and it is simply suitable for, dependable performance, with low cost, can substitute traditional power distribution equipment not possessing surge suppression function.
To achieve these goals, the utility model adopts following technical scheme:
Have a complete power distribution equipment for surge suppression function, its main circuit comprises main circuit breaker CB1, bypass breaker CB2 and resistor R; Bypass breaker CB2 and resistor R parallel connection forms parallel branch; Handcart-type main circuit breaker CB1 is series between the input of the parallel branch of bus and bypass breaker CB2 and resistor R, the output terminating load FZ of the parallel branch of bypass breaker CB2 and resistor R.
Preferably, current transformer LH and earthed switch ES is also comprised; Current transformer LH and earthed switch ES is arranged between the output of the parallel branch of bypass breaker CB2 and resistor R and load FZ.
Preferably, main circuit breaker CB1 is handcart type breaker, and bypass breaker CB2 is fixed breaker or handcart type breaker.
Preferably, controller KZQ and optical fiber type voltage sensor GYH is also comprised; Main circuit breaker CB1 is provided with the first auxiliary switch F1 being used to indicate main circuit breaker CB1 on/off switch state, and bypass breaker CB2 is provided with the second auxiliary switch F2 being used to indicate bypass breaker CB2 on/off switch state; Optical fiber type voltage sensor GYH is for detecting voltage on resistor R; Described controller KZQ connects the actuating structure of described main circuit breaker CB1, the actuating structure of bypass breaker CB2, the first auxiliary switch F1, the second auxiliary switch F2 and optical fiber type voltage sensor GYH.
Preferably, the parallel branch that main circuit breaker CB1, bypass breaker CB2 and resistor R parallel connection is formed is placed in metal-enclosed switchgear; Main circuit breaker CB1 is arranged on the middle part of metal-enclosed switchgear, and bypass breaker CB2 is arranged on the bottom of metal-enclosed switchgear.
A kind of complete power distribution equipment with surge suppression function of the utility model, its main circuit configures earthed switch by the parallel branch of handcart-type main circuit breaker, fixed bypass breaker and resistor, conventional current instrument transformer three again after connecting and forms.Surge suppression function is closed by resistor place in circuit in advance by main circuit breaker, implements excitatory or precharge in advance to accumulation energy type load, resistor bypass is realized after certain time-delay by bypass breaker is closed again.Current transformer is used for the electric energy metrical of complete power distribution equipment or the relaying protection of main circuit breaker; Handcart-type main circuit breaker can shift out when turnaround of unit is safeguarded, then by ground switch earthing to ensure the safety of staff.The controller of device gathers optical fiber type voltage sensor signals and each auxiliary switch for circuit breaker signal, is controlled the state of main circuit breaker and bypass breaker by rational logical operation.Above-mentioned all parts can be integrated in a metal-enclosed switchgear, form the Novel complete set power distribution equipment of complete set.
The utility model technology can need to limit the occasion of shoving in most accumulation energy type load (inductive load and capacitive load) with transporting.Specifically as follows by controller operation: (1) initial condition, main circuit breaker and bypass breaker are all in gate-dividing state; (2) surge suppression state, main circuit breaker closes a floodgate resistor place in circuit; (3) normal operating condition, after predetermined time delay completes, bypass breaker closes a floodgate resistor bypass; (4) troubleshooting state, such as refuse to close or false conjunction if bypass breaker breaks down when closing a floodgate, help controller makes accurate judgment by auxiliary switch for circuit breaker signal and optical fiber type voltage sensor signals, sends separating brake order to ensure resistor safety and to send alarm signal if desired to main circuit breaker.
Handcart-type main circuit breaker can adopt an isolating switch and a fixed breaker to replace.
Fixed bypass breaker can adopt contactor or on-load switch to replace.
Current transformer and earthed switch can be matched according to the functional requirement of device, are not that surge suppression must parts.
Relative to prior art, the utility model has following beneficial effect: the utility model is by between the input that handcart-type main circuit breaker CB1 is series at the parallel branch of bus and fixed bypass breaker CB2 and resistor R, handcart-type main circuit breaker CB1 can be shifted out when overhauling, ensure that safety during artificial maintenance; The utility model take into account applicability, the fail safe of device to greatest extent under the prerequisite adequately achieving surge suppression function, the equal accessible site of all parts forms the Novel complete set power distribution equipment of complete set in a metal-enclosed switchgear, makes user on input basis, conventional electrical distribution device space, just can reach the object of surge suppression with minimum economic cost.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is circuit theory schematic diagram of the present utility model;
Fig. 2 is the lateral plan of the structure of the utility model embodiment;
Fig. 3 is the front view of Fig. 2.
Embodiment
Refer to shown in Fig. 1 to Fig. 3, the utility model relates to a kind of complete power distribution equipment with surge suppression function, and its main circuit comprises the parallel branch of main circuit breaker CB1, bypass breaker CB2 and resistor R; Conventional current instrument transformer LH and earthed switch ES can also be matched.
Main circuit breaker CB1 is handcart-type main circuit breaker, and bypass breaker CB2 is fixed breaker or handcart type breaker.Main circuit breaker CB1 is connected between the input of the parallel branch of bus and bypass breaker CB2 and resistor R, the output terminating load FZ of the parallel branch of bypass breaker CB2 and resistor R; Current transformer LH and earthed switch ES can be configured between the output of the parallel branch of bypass breaker CB2 and resistor R and load FZ.LH is used for the electric energy metrical of complete power distribution equipment or the relaying protection of CB1.
Main circuit breaker CB1 is arranged on the middle part of power distribution cabinet, conveniently shifts out maintenance; Bypass breaker CB2 is arranged on the bottom of power distribution cabinet.
Surge suppression function is closed by resistor R place in circuit in advance by main circuit breaker CB1, excitatory or precharge is in advance implemented to accumulation energy type load FZ (inductive load or capacitive load), again resistor R bypass is realized by bypass breaker CB2 is closed after certain time-delay.Current transformer LH is used for the electric energy metrical of complete power distribution equipment or the relaying protection of main circuit breaker CB1; Main circuit breaker CB1 can shift out when turnaround of unit is safeguarded, then by earthed switch ES ground connection to ensure the safety of staff.
Complete power distribution equipment also comprises controller KZQ and optical fiber type voltage sensor GYH, main circuit breaker CB1 is provided with the first auxiliary switch F1 for showing main circuit breaker CB1 on/off switch state, and bypass breaker CB2 is provided with the second auxiliary switch F2 for showing bypass breaker CB2 on/off switch state.Optical fiber type voltage sensor GYH, for detecting voltage on resistor R.
Controller KZQ connects main circuit breaker CB1, bypass breaker CB2, the first auxiliary switch F1, the second auxiliary switch F2 and optical fiber type voltage sensor GYH, by controlling the state of main circuit breaker CB1 and bypass breaker CB2 to the identification of optical fiber type voltage sensor GYH signal, the first auxiliary switch F1 signal, the second auxiliary switch F2 signal.By the optimal design to current conventional metal closure formula switch cubicle, above-mentioned all parts can be integrated in a cabinet, form the Novel complete set power distribution equipment (common complete power distribution equipment does not comprise above-mentioned CB2, R, GYH and controller) of complete set, Fig. 2 is shown in apparatus structure signal.Lightning arrester 7 and cable clip 8 and zero sequence current mutual inductor are also installed in metal-enclosed switchgear; Metal-enclosed switchgear top is also provided with Displaying Meter 9.
A kind of control method with the complete power distribution equipment of surge suppression function of the utility model comprises: (1) initial condition, main circuit breaker CB1 and bypass breaker CB2 is all in gate-dividing state, and controller is identified this state by auxiliary switch F1 and F2 signal; (2) surge suppression state, main circuit breaker CB1 closes a floodgate resistor R place in circuit, implement excitatory or precharge in advance to accumulation energy type load FZ, controller is undertaken identifying by the auxiliary switch F1 of CB1 and optical fiber type voltage sensor GYH signal and starts the timing device of inside; (3) normal operating condition, after the predetermined timing of controller completes, control bypass breaker CB2 closes a floodgate resistor R bypass, controller by auxiliary switch F1, F2 and optical fiber type voltage sensor GYH signal this state identified and CB2 is divided, "on" position controls; (4) troubleshooting state, if bypass breaker CB2 breaks down when closing a floodgate, by the second auxiliary switch F2, controller KZQ detects that bypass breaker CB2 does not close a floodgate and optical fiber type voltage sensor GYH detects that voltage on resistor R is higher than set point, controller KZQ sends separating brake order and alarm signal to main circuit breaker CB1, make main circuit breaker CB1 separating brake, ensure resistor R safety.During maintenance, shift out main circuit breaker CB1, earthed switch ES is closed a floodgate, then overhauls.
According to specific exemplary embodiment, the utility model is described herein, to one skilled in the art, carries out suitable replacement under scope of the present utility model or amendment will be apparent not departing from.Exemplary embodiment is only illustrative, instead of the restriction to scope of the present utility model, and scope of the present utility model is defined by appending claims.
Claims (6)
1. have a complete power distribution equipment for surge suppression function, it is characterized in that, its main circuit comprises main circuit breaker CB1, bypass breaker CB2 and resistor R; Bypass breaker CB2 and resistor R parallel connection forms parallel branch; Main circuit breaker CB1 is series between the input of the parallel branch of bus and bypass breaker CB2 and resistor R, the output terminating load FZ of the parallel branch of bypass breaker CB2 and resistor R.
2. a kind of complete power distribution equipment with surge suppression function according to claim 1, is characterized in that, also comprise current transformer LH and earthed switch ES; Current transformer LH and earthed switch ES is arranged between the output of the parallel branch of bypass breaker CB2 and resistor R and load FZ.
3. a kind of complete power distribution equipment with surge suppression function according to claim 1, it is characterized in that, main circuit breaker CB1 is handcart type breaker, and bypass breaker CB2 is fixed breaker or handcart type breaker.
4. a kind of complete power distribution equipment with surge suppression function according to claim 1, is characterized in that, also comprises controller KZQ and optical fiber type voltage sensor GYH; Main circuit breaker CB1 is provided with the first auxiliary switch F1 being used to indicate main circuit breaker CB1 on/off switch state, and bypass breaker CB2 is provided with the second auxiliary switch F2 being used to indicate bypass breaker CB2 on/off switch state; Optical fiber type voltage sensor GYH is for detecting voltage on resistor R; Described controller KZQ connects the actuating structure of described main circuit breaker CB1, the actuating structure of bypass breaker CB2, the first auxiliary switch F1, the second auxiliary switch F2 and optical fiber type voltage sensor GYH.
5. a kind of complete power distribution equipment with surge suppression function according to claim 1, is characterized in that, the parallel branch that main circuit breaker CB1, bypass breaker CB2 and resistor R parallel connection is formed is placed in metal-enclosed switchgear; Main circuit breaker CB1 is arranged on the middle part of metal-enclosed switchgear, and bypass breaker CB2 is arranged on the bottom of metal-enclosed switchgear.
6. there is a complete power distribution equipment for surge suppression function, it is characterized in that, main circuit breaker CB1 according to claim 3 is replaced with isolating switch and a fixed breaker of series connection; Bypass breaker CB2 according to claim 3 is replaced with contactor or on-load switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420516106.2U CN204089004U (en) | 2014-09-09 | 2014-09-09 | A kind of complete power distribution equipment with surge suppression function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420516106.2U CN204089004U (en) | 2014-09-09 | 2014-09-09 | A kind of complete power distribution equipment with surge suppression function |
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| CN204089004U true CN204089004U (en) | 2015-01-07 |
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| CN201420516106.2U Active CN204089004U (en) | 2014-09-09 | 2014-09-09 | A kind of complete power distribution equipment with surge suppression function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242136A (en) * | 2014-09-09 | 2014-12-24 | 李品德 | Power distribution device set with inrush current inhibition function and control method of power distribution device set |
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2014
- 2014-09-09 CN CN201420516106.2U patent/CN204089004U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242136A (en) * | 2014-09-09 | 2014-12-24 | 李品德 | Power distribution device set with inrush current inhibition function and control method of power distribution device set |
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