CN2523089Y - Protection device from low-voltage feedback to high-voltage execution for movable converting station - Google Patents
Protection device from low-voltage feedback to high-voltage execution for movable converting station Download PDFInfo
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- CN2523089Y CN2523089Y CN 01260247 CN01260247U CN2523089Y CN 2523089 Y CN2523089 Y CN 2523089Y CN 01260247 CN01260247 CN 01260247 CN 01260247 U CN01260247 U CN 01260247U CN 2523089 Y CN2523089 Y CN 2523089Y
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Abstract
A protection device of low voltage feedback and high voltage execution for a mobile transformer substation relates to a comprehensive protection equipment of the mobile transformer substation underground coal mine. The previous mobile transformer substation comprises a high voltage distribution equipment, a transformer and a low voltage protection box. A manual disconnector works as a zero load actuator in high voltage distribution and an automatic breaker works as a load actuator in low voltage protection. At the moment of switching off the low voltage breaker, a contact generates an electric arc to break down the insulation; therefore, the capacity of the mobile transformer substation is limited. In order to develop the mobile transformer substation with large capacity and improve comprehensive protection as well as lengthen service life, the utility model puts forward a technical proposal that a low voltage side collects fault signals and feedbacks to the automatic turnoff of the high voltage side so as to realize a function of safety protection. The high voltage side is provided with a high voltage vacuum breaker and a high voltage electric network comprehensive protector comprising a singlechip and the low voltage side is provided with a low voltage electric network comprehensive protector comprising a singlechip, therefore, a supervisory circuit can input the fault signals into the low voltage protector, feedback to the high voltage protector after analysis and judgment, and send out executive signals to cause the cut-off of the breaker.
Description
One, technical field
The utility model relates to the integrated protection and the final controlling element of mobile substation under the coal mine.
Two, background technology
Mobile substation (abbreviation moves change) is an important step in the fully-mechanized mining working face electric power system under the coal mine.It is the rated voltage that the high-tension electricity of down-hole electric substation output is transformed into power consumption equipment, and can implement the equipment of safety monitoring and control to this link." move change " and form by high voltage distribution installation, transformer, low-voltage variation case three parts." moving change " in the past, its high voltage distribution installation are to be actuator by manual isolating switch, and when the transformer no-load operation, cutoff high side power supply separates high voltage supply system and transformer, so that to transformer or lower-voltage circuit inspection, maintenance.Its low-voltage variation case is to be actuator by automatic circuit breaker, and on load operation equipment is cut off control.Be about to step down side output electricity and separate, so that power consumption equipment is checked, safeguarded with power consumption equipment.Because the low pressure automatic circuit breaker is on load operation incision deenergizing, in the moment of cutting off, the contact of circuit breaker can produce electric arc, electromagnetic attraction, therefore, arc energy with insulation breakdown, burn out or sintering, make circuit breaker lose power down function.The electric current of circuit breaker control is big more, and the electric arc of generation is strong more, and destructiveness is big more, thus the capacity of circuit breaker and breaking capacity be restricted, thereby the capacity of mobile substation also just is restricted.On the other hand, along with development and progress of science and technology that coal is produced, the fully-mechanized mining equipment installed capacity constantly increases, and the capacity of mobile substation must increase thereupon, and this has brought a difficult problem with regard to giving supporting protective device.The capacity that wants to improve low-voltage circuit breaker is very difficult, and is not only relevant with design, the manufacture level of low-voltage circuit breaker, and the material of big capacity contact still belongs to blankly at home, therefore, still do not have big capacity low pressure circuit breaker product at present.By retrieval, from the gained document as can be known, there are Britain, Germany and Polish in the country of external " moving change " advanced technology, associated documents: " explosion-proof transformer " Min.Technol.Among 1994,76 (5) 154-156, introduced the explosion-proof mobile substation of 3KV that Britain Brush company produces, by dry type mine anti-explosion transformer, high-voltage switch gear case and low tension switch case three parts are formed.That the high-pressure side has is under-voltage, short circuit, inverse time overload protection.France " moving change " has THEB type (6KV), AEG type (6KV), Siemens (6KV).Associated documents: " single-chip microcomputer is applied to the discussion of mobile substation low-voltage feeder switch "; coal scientific research reference 1994 (5/6) 57-59; introduce single-chip microcomputer and peripheral interface circuit thereof and be applied to the explosion isolation type low-voltage feeding switch, be equipped with corresponding software, can realize its control and defencive function.In range of search, find rated voltage 10KV, the rated operational current 200A identical, single-chip microcomputer protection, the bibliographical information of mobile substation under the coal mine of low-pressure side fault jumping high-pressure side high-voltage vacuum distribution equipment with the utility model.Because existing " moving changes " is subjected to the influence of its low-voltage variation case, the capacity that exists little (＜2000KVA), the integrated protection poor performance, shortcoming such as lack useful life, therefore, can not satisfy the needs of production development.
Three, summary of the invention
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art; the protective device that provides a kind of mobile substation to carry out by low pressure feedback high pressure; make the capacity of mobile substation increase (〉=2000KVA), satisfy the needs of production development, and its reliability, life-span are improved.
The utility model is achieved through the following technical solutions.The protective device that a kind of mobile substation is carried out by low pressure feedback high pressure comprises transformer, contains the high-pressure side circuit of high voltage isolator, control transformer and protective circuit, and the lower-voltage circuit that contains single-chip microcomputer.It is characterized in that described high-pressure side circuit is to be connected with high-pressure vacuum breaker below high voltage isolator; high-pressure vacuum breaker presses release coil and electromagnetism shunt opening trip coil to drive that its main contact is disconnected to be closed by the nothing of control loop, and is connected with the control end of grid system integrated protector by control loop.Described lower-voltage circuit is made up of low-voltage network comprehensive protection device and low-voltage protection circuit; its working power is connected with grid system integrated protector with major loop by binding post, and the feedback signal of low-voltage protection circuit is connected with grid system integrated protector by binding post.
The control loop of described high-pressure vacuum breaker, be from control transformer input 100V power supply, insure to rectifier through fusing and to be transformed into direct current, after nothing presses release coil to be serially connected in the fusing insurance, and be connected with the port of grid system integrated protector, one end of electromagnetism shunt opening trip coil connects the anode of rectifier, and the other end inserts the port of high-voltage fence protector, and the negative terminal of rectifier inserts the port of high-voltage fence protector; Also be provided with the reverse device of diode, current-limiting resistance, filter capacitor, harmonic wave electric capacity on the loop.
Described grid system integrated protector; it is the high-voltage control circuit that comprises single-chip microcomputer; insure cut-in operation power supply (100V) from control transformer through fusing; high-pressure side ground protection, overload protection, open phase protection, insulation protection circuit signal are inserted by different inputs respectively; be provided with: the input port of low pressure feedback signal; the signal input end mouth of control of high-voltage circuit breaker coil, circuit breaker self-insurance signal input port, and reset circuit high voltage protective device grounding ports.
Described low-voltage network comprehensive protection device; it is the low-voltage control circuit that comprises single-chip microcomputer; its working power inserts from the power input mouth through unit switch, fusing insurance; the overcurrent protection signal of electric leakage and earth leakage search/lockout signal, low tension loop is inserted by different input ports respectively; be provided with: the output port of low-voltage variation control signal, and low-pressure side voltage is indicated, low-voltage variation device grounding ports.
The utility model compared with prior art has following advantage and beneficial effect:
Because under the situation of same capability, the high-pressure side loop current is little, the low-pressure side loop current is big, and the high-pressure side loop current only is 1/n a times of low-pressure side loop current.N is the transformation ratio of transformer, and " moving change " transformation ratio n of down-hole fully-mechanized mining working is generally 2-3, so under the constant condition of original designing technique, raw material and former circuit breaker breaking capacity, the capacity of " moving change " with regard to extendible capacity 2-3 doubly.According to above transformer characteristic; the utility model proposes by low-pressure side and gather fault-signal; feed back to the technical scheme that the high-pressure side automatic circuit breaker is carried out; can start big capacity (〉=2000KVA) field; realize the safety protection function of " moving change "; not only can satisfy the needs of production development, and the life-span of having improved protective device greatly.Because high-pressure vacuum breaker and control loop thereof are reasonable in design, under the acting in conjunction of no-voltage release and electromagnetism shunt release, make the primary cut-out reliable in action, reach and resolve the purpose that the high pressure main circuit is closed in open and close.Because grid system integrated protector adopts advanced single-chip microcomputer and control circuit thereof, therefore accurately analysis and judgement high and low pressure fault and safety detection sampled signal, the breaker signal of output driving has in time been guaranteed the reliability of protective device.Because single-chip microcomputer and control circuit thereof that low-voltage network comprehensive protection device adopts, the safety and the fault-signal of the low tension loop of in time sampling accurately feed back to grid system integrated protector, thereby have realized the defencive function by the execution of low pressure feedback high pressure.In a word, the utility model has obvious improvement and positive effect than prior art.
Four, description of drawings
Fig. 1 is an electrical principle block diagram of the present utility model, and GD represents high-pressure vacuum breaker among the figure, and SQ represents no-voltage release, and TQ represents the electromagnetism shunt release, and GZBD-1 represents grid system integrated protector, and DZBD-1 represents low-voltage network comprehensive protection device.
Fig. 2 is the circuit diagram of a kind of mobile substation by the protective device of low pressure feedback high pressure execution.
Five, embodiment
Be described further in conjunction with the accompanying drawings below by an embodiment.
As shown in Figure 1, 2, the protective device that a kind of mobile substation is carried out by low pressure feedback high pressure, its circuit mainly is made up of transformer KBSGZY, high-pressure side circuit, lower-voltage circuit three parts.Be the boundary with the transformer among Fig. 2, the left side is the high-pressure side circuit, and the right side is a lower-voltage circuit.
1, high-pressure side circuit: the high voltage source that is input to " moving change " by the down-hole is three-phase electricity A, B, C, voltage is 10KV, at first be linked on the high voltage isolator GK, high voltage isolator is the master switch of " moving change ", for maintenance " move change " is provided with, it is a hand switch, not as there being the shutoff of carrying to use.Circuit below the high voltage isolator GK is divided into two-way, and a road direction right side exports control power transformation device PT to, the step-down of 10KV high pressure is transformed into the low pressure of 100V, as the power supply of control circuit; Another road main circuit is to high pressure vacuum circuit-breaker GD, and it is that control the disconnected of main circuit closed, and promptly gives transformer normal power supply, outage and having under transformer and the low-voltage power supply loop fault situation carried to cut off the power supply.The contact of high-pressure vacuum breaker is pressed the driving of release coil SQ and electromagnetism shunt opening trip coil TQ by the nothing of control loop and is broken and close.The control loop of high-pressure vacuum breaker GD; the 100V power supply is by DQ8 and DQ18 input; insure RD2 to rectifier Q1 conversion direct current through fusing; after nothing presses release coil SQ to be serially connected in fusing insurance RD2; and be connected with the port ZB9 of grid system integrated protector GZBD-1; the end of electromagnetism shunt opening trip coil TQ connects the anode of rectifier Q1; the other end inserts the port ZB20 of high-voltage fence protector GZBD-1; the negative terminal of rectifier Q1 inserts the port ZB10 of high voltage protective device GZBD-1, also is provided with the reverse device D1 of diode on the loop; current-limiting resistance R2; filter capacitor C2; harmonic wave capacitor C 1.Circuit below the high-pressure vacuum breaker GD: RY1-3 is a protection piezo-resistance circuit, is used for eliminating the instantaneous pressure in the main circuit; CT1, CT2, CT3 represent the sensor coil of high-pressure side overcurrent, short circuit, open phase protection, according to transformer principle, be transformed into ZB7, ZB17, ZB16, the ZB6 sampled signal input of electric current, voltage signal, access grid system integrated protector GZBD-1, compare, judge, send drive circuit breaker GD; OLH is the part in the power direction selection ground protection circuit, another part is the ZB15 circuit, they are according to electromagnetic principle and three-phase electricity characteristics design, when three-phase electricity just often, sampling part is output signal not, when a phase ground connection, zero-sequence current is arranged just, sampling part has signal to export ZB5 or the ZB15 of GZBD-1 to immediately, and control circuit is just carried out creepage protection function; UGSP is a high-voltage cable insulating Pilot line protection circuit, and after insulation damages or insulation values reduced between each electric wire in the cable, UGSP just had supervisory signal, and by ZB12 input GZBD-1, Drive and Control Circuit is carried out the protection that insulation descends.
Grid system integrated protector GZBD-1 is the high-voltage control circuit that comprises single-chip microcomputer, and the control voltage 100V of control transformer PT output is inserted by ZB6, ZB18 through fusing insurance RD1; ZB5, ZB15 are the input of on high-tension side ground protection circuit signal; ZB7, ZB17, ZB16, ZB6 are the input of on high-tension side overload, short circuit, open-phase protection circuit signal; ZB12 is the insulation protection input; ZB11, ZB14 are the inputs that receives the low pressure feedback signal; ZB3, ZB13 are the self-insurance signal input part that opens circuit; ZB10, ZB20, ZB9 are the control end of circuit breaker control coil; ZB2, ZB4 are the simulation test circuit input end; ZB1 is the earth terminal of GZBD-1.
2, lower-voltage circuit: main circuit exports the low-voltage side outlet chamber to by transformer KBSGZY secondary side, in Fig. 2: the output of three-phase 1140 voltages.LDA, R3 form electric-leakage detection circuit; SK, BK, EK, D2, C2, C4 form leakage protection circuit, and its signal of telecommunication inserts the ZB5 input of low-voltage network comprehensive protection device DZBD-1; CT1, CT2, CT3 are low tension loop overcurrent protection transducer, according to transformer principle, are transformed into the signal of telecommunication, by input ZB15, ZB16, the ZB17 access of low voltage electric network protector DZBD-1; TB1 is the ZB3 end that the transformer of voltage indicating circuit inserts DZBD-1.
Low-voltage network comprehensive protection device DZBD-1 is the low-voltage control circuit that comprises single-chip microcomputer, and its 100V working power is connected with power input ZB6, ZB18 through unit switch ZK, fusing insurance RD3; Be provided with: the input ZB5 of electric leakage and earth leakage search/lockout signal, low-voltage overcurrent protection signal input part ZB17, ZB16, ZB15, low-pressure side voltage indicating circuit input ZB3, the earth terminal ZB1 of low-voltage variation device circuit; The feedback signal of low-voltage variation is connected with respective input ZB11, the ZB14 of grid system integrated protector GZBD-1 with 4 through binding post 3 by its output ZB11, ZB14.In addition, high-pressure side binding post 1 and 2 is connected on low-pressure side binding post 1 and 2 with line, goes up 1 and 2 again and delivers to low-voltage network comprehensive protection device, and working power is provided.On the connection line of high-pressure side and low-pressure side, also be connected to the transformer monitoring temperature circuit that temperaturecontrol sensor JT and R3 form.
Operation principle of the present utility model: when circuit normal, circuit breaker GD closure, major loop begin the power supply.Suppose the power consumption equipment overload; the low-pressure side overload detection circuit; just can detect overload signal as ZB15 part among Fig. 2; and its signal is input to low-voltage network comprehensive protection device DZBD-1; by analysis, after comparison and the judgement; again it being carried out signal is fed back among the grid system integrated protector GZBD-1 by ZB11 and ZB14; grid system integrated protector sends the execution signal immediately; and by ZB9 and ZB20 output; circuit breaker GD just cuts off the power supply after receiving signal immediately; finish protective effect, and do corresponding fault demonstration (, not drawing in the display part component) for briefly.
Claims (4)
1, the protective device that a kind of mobile substation is carried out by low pressure feedback high pressure, comprise: transformer (KBSGZY), contain high voltage isolator (GK), the high-pressure side circuit of control transformer (PT) and protective circuit, the lower-voltage circuit that contains protective circuit, it is characterized in that: described high-pressure side circuit is connected with high-pressure vacuum breaker (GD) behind isolating switch (GK), high-pressure vacuum breaker is pressed release coil (SQ) and disconnected the closing of electromagnetism shunt opening trip coil (TQ) driving main contact by the nothing of control loop, and is connected by the control end of control loop with grid system integrated protector (GZBD-1); Described lower-voltage circuit; form by low-voltage network comprehensive protection device (DZBD-1) and low-voltage protection circuit; its working power is connected with grid system integrated protector (GZBD-1) with major loop by binding post (1 and 2), and the feedback signal of low-voltage protection circuit is connected with grid system integrated protector by binding post (3 and 4).
2, according to the protective device of the described mobile substation of claim 1 by the execution of low pressure feedback high pressure, it is characterized in that: the control loop of described high-pressure vacuum breaker (GD), be from control transformer (PT) input 100V. power supply, insure (RD2) to rectifier (Q1) through fusing, after nothing presses release coil (SQ) to be serially connected in the fusing insurance, and be connected with the port (ZB9) of grid system integrated protector, one end of electromagnetism shunt opening off line coil (TQ) connects the anode of rectifier, the other end inserts the port (ZB20) of high-voltage fence protector, and the negative terminal of rectifier inserts the port (ZB10) of high-voltage fence protector; Also be provided with the reverse device of diode (D1), current-limiting resistance (R2), filter capacitor (C2), harmonic wave electric capacity (C1) on the loop.
3; according to the protective device of the described mobile substation of claim 1 by the execution of low pressure feedback high pressure; it is characterized in that: described grid system integrated protector (GZBD-1); it is the high-voltage control circuit that comprises single-chip microcomputer; insure (RD1) by port (ZB6 from control transformer (PT) through fusing; ZB18) insert; be provided with: high-pressure side ground protection circuit signal input (ZB5; ZB15); the high-pressure side overload; short circuit; open-phase protection circuit signal input part (ZB7; ZB17; ZB16; ZB6); insulation protection input (ZB12); receive the input (ZB11 of low pressure feedback signal; ZB14); self-insurance signal input part (ZB3 opens circuit; ZB13); control end (the ZB10 of circuit breaker control coil; ZB20; ZB9); simulation test circuit input end (ZB2; ZB4), protector earth terminal (ZB1).
4; according to the protective device of the described mobile substation of claim 1 by the execution of low pressure feedback high pressure; it is characterized in that: described low-voltage network comprehensive protection device (DZBD-1); it is the low-voltage control circuit that comprises single-chip microcomputer; its working power is through unit switch (ZK); fusing insurance (RD3) and power input (ZB6; ZB18) connect; be provided with: the input (ZB5) of electric leakage and earth leakage search/lockout signal; low-voltage overcurrent protection signal input part (ZB17; ZB16; ZB15); low-pressure side voltage indicating circuit input (ZB3); the earth terminal (ZB1) of low-voltage variation device circuit, the feedback signal of low-voltage variation is by output (ZB11; ZB14) through the input (ZB11 of binding post (3 and 4) with grid system integrated protector (GZBD-1); ZB14) connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01260247 CN2523089Y (en) | 2001-09-26 | 2001-09-26 | Protection device from low-voltage feedback to high-voltage execution for movable converting station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01260247 CN2523089Y (en) | 2001-09-26 | 2001-09-26 | Protection device from low-voltage feedback to high-voltage execution for movable converting station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2523089Y true CN2523089Y (en) | 2002-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01260247 Expired - Fee Related CN2523089Y (en) | 2001-09-26 | 2001-09-26 | Protection device from low-voltage feedback to high-voltage execution for movable converting station |
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| Country | Link |
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| CN (1) | CN2523089Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102487190A (en) * | 2010-12-01 | 2012-06-06 | 河南省电力公司南阳供电公司 | High-voltage side protection device of transformer |
| CN102646964A (en) * | 2012-04-28 | 2012-08-22 | 山西科泰电气有限公司 | High-low voltage integrated control device for coal mine power center |
| CN106099834A (en) * | 2016-06-21 | 2016-11-09 | 淮南矿业(集团)有限责任公司 | A kind of mobile substation outlet protection circuit |
| CN112751312A (en) * | 2021-01-06 | 2021-05-04 | 北京博瑞莱智能科技集团有限公司 | Novel box transformer substation and power distribution protection system thereof |
-
2001
- 2001-09-26 CN CN 01260247 patent/CN2523089Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102487190A (en) * | 2010-12-01 | 2012-06-06 | 河南省电力公司南阳供电公司 | High-voltage side protection device of transformer |
| CN102487190B (en) * | 2010-12-01 | 2016-08-17 | 国网河南省电力公司南阳供电公司 | High-voltage side protection device of transformer |
| CN102646964A (en) * | 2012-04-28 | 2012-08-22 | 山西科泰电气有限公司 | High-low voltage integrated control device for coal mine power center |
| CN106099834A (en) * | 2016-06-21 | 2016-11-09 | 淮南矿业(集团)有限责任公司 | A kind of mobile substation outlet protection circuit |
| CN106099834B (en) * | 2016-06-21 | 2018-12-25 | 淮南矿业(集团)有限责任公司 | A kind of mobile substation outlet protection circuit |
| CN112751312A (en) * | 2021-01-06 | 2021-05-04 | 北京博瑞莱智能科技集团有限公司 | Novel box transformer substation and power distribution protection system thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |