CN2720613Y - Inversion device of mixed soft-cut current-limited breaker - Google Patents

Inversion device of mixed soft-cut current-limited breaker Download PDF

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Publication number
CN2720613Y
CN2720613Y CN 200420078281 CN200420078281U CN2720613Y CN 2720613 Y CN2720613 Y CN 2720613Y CN 200420078281 CN200420078281 CN 200420078281 CN 200420078281 U CN200420078281 U CN 200420078281U CN 2720613 Y CN2720613 Y CN 2720613Y
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CN
China
Prior art keywords
circuit
diode
current
igbt
common
Prior art date
Application number
CN 200420078281
Other languages
Chinese (zh)
Inventor
郑建勇
梅军
秦申蓓
丁祖军
苏麟
吴恒荣
陈军
Original Assignee
东南大学
江苏华厦电气集团
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 东南大学, 江苏华厦电气集团 filed Critical 东南大学
Priority to CN 200420078281 priority Critical patent/CN2720613Y/en
Application granted granted Critical
Publication of CN2720613Y publication Critical patent/CN2720613Y/en

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Abstract

An inversion device of mixed soft-cut current-limited breaker relates to the inversion device of mixed soft-cut current-limited breaker used by the circuit breakers, composed of a diode bridge circuit and an insulated gate bipolar transistor T1. The collector terminals of the insulated gate bipolar transistors are connected with the common-cathode terminals of the diode bridge circuit D1 and D2, and the emitter terminals of the insulated gate bipolar transistors are connected with the common-anode terminals of the diode bridge circuit D3 and D4. The utility model is characterized in that a buffer circuit 1 is connected between the common-cathode terminal of the diode bridge circuit D1 and D2 and the common-anode terminal of the diode bridge circuit D3 and D4. The buffer circuit is composed of a diode D11, a resistor R11, and a capacitor C 11, and the diode and the resistor are connected in series with the capacitor after being connected in parallel. Both ends of the capacitor of the buffer circuit are connected in parallel with an absorbing circuit 2 and a reset circuit 3.

Description

The current converter of mixed soft cut-off current-limiting circuit breaker

Technical field

The utility model belongs to the power transmission and distribution device, relates in particular to the current converter of a kind of circuit breaker with mixed soft cut-off current-limiting circuit breaker.

Background technology

Along with the expansion of electric power system scale and increasing of power consumption equipment, the user has higher requirement to power quality.And a large amount of mechanical type circuit breakers that adopt in the ac transmission at present, as oil circuit breaker, air circuit etc., advantage that let it be to the greatest extent clearly, conducting is stable, carrying load ability is strong.But its shortcoming is along with the raising that the quality of power supply is required is also more and more outstanding, because of can not provide in real time, service action flexibly, continuously and fast, accident is enlarged, destroy the stability of a system, be difficult to satisfy the sharply requirement of the breaking capacity of increase; When disconnecting consumers, often there is electric arc to produce, the easy scaling loss of contact, switch off time is long, is difficult to satisfy some power consumers to the quick-action requirement that fault current cut-offs, and is necessary to study to increase substantially the technology that circuit breaker cut-offs speed; Noise is arranged in running, and the mechanical electric life-span is restricted etc.Therefore, utilization modern power electronics technology design, development and transformation novel breaker become the target of current circuit breaker development.The foreign scholar has proposed a kind of new type hybrid current limiting circuit breaker at present, it is on the basis of electromagnetic switch, utilize power electronic device in parallel with the contact of electromagnetic switch as non-contact switch, bear steady-state process by electromagnetic switch, and non-contact switch solves the dynamic process of switch, and both form mutual supplement with each other's advantages.The operation principle of mixing type current-limiting circuit breaker is: when control system detects Circuits System when breaking down, it will be exported, when electromagnetic switch is opened, non-contact switch is conducting simultaneously also, utilizes the arc voltage that produces between the electromagnetic switch contact, and the fault current that flows to electromagnetic switch is reduced, and make it to flow to the non-contact switch loop, when fault current flow to this loop fully, non-contact switch is turn-offed the fast shut-off fault current.The energy of putting aside in loop inductance shows with the form of voltage, absorbs through the mode of the Resistor-Capacitor Unit in lightning arrester and the loop with heat energy.Compare with the silent oscillation circuit breaker, the mixing type current-limiting circuit breaker combines the advantage of electromagnetic type and state type circuit breaker, and overcome shortcoming separately, break-make and simple in structure fast, because power electronic device is only in moment conducting that switch cut-offs, almost do not have loss at ordinary times, all have save heavy cooling device.But the at present common solid-state change of current loop modes that adopt hard shutoff, this will produce bigger moment overvoltage on device, damage device easily more.

Summary of the invention

The utility model provides a kind of current converter of mixed soft cut-off current-limiting circuit breaker of the transient working characteristic that can improve solid-state switch.

The utility model adopts following technical scheme:

A kind of circuit breaker current converter of mixed soft cut-off current-limiting circuit breaker, form by diode-bridge circuit and igbt T1, the collector terminal of igbt T1 is connected with the common cathode end of D2 with diode-bridge circuit D1, the emitter terminal of igbt T1 is connected with the common anode tap of D4 with diode-bridge circuit D3, cross-over connection buffer circuit 1 between the common anode tap of the common cathode end of diode-bridge circuit D1 and D2 and D3 and D4, buffer circuit 1 is by diode D11, resistance R 11 and capacitor C 11 constitute, diode D11 and resistance R 11 back that is connected in parallel is connected in series with capacitor C 11, and being connected in parallel at the two ends of the capacitor C 11 of buffer circuit 1 absorbs circuit 2 and reset circuit 3.

Compared with prior art, the utlity model has following advantage:

The utility model is on the basis of the bridge circuit of IGBT and diode formation, binding buffer loop and absorption circuit are as the change of current loop of mixing type current-limiting circuit breaker, the solid-state switch break-make speed that reason IGBT constitutes is in the microsecond level, so can greatly improve the operating rate of device; Bridge type return can be converted to direct current with interchange, has characteristic of simple structure; The contact that the major loop switch can be protected in the loop of the change of current simultaneously plays the extinguishing arc effect, and this helps prolonging the useful life of equipment.Utilize electric capacity to remedy the difference of reaction speed between IGBT and the absorption circuit as buffer circuit, improved the transient working characteristic of solid-state switch, not only reduced the surge voltage that line inductance produces when turn-offing, and reduced the switching loss of device simultaneously, reduce the influence of electric current and voltage change ratio, improved the reliability of circuit.

Description of drawings

Fig. 1 is the utility model commutation circuit topology structure chart.

Fig. 2 is the utility model converter circuit schematic diagram.

Fig. 3 has used mixing type current-limiting circuit breaker functional schematic of the present utility model.

Fig. 4 is drive circuit control timing and current conversion waveform.

Fig. 5 is the soft cut-off current voltage of an igbt schematic diagram.

Fig. 6 is the curve chart of both end voltage influence when absorbing circuit igbt being turn-offed, and wherein, Fig. 9 (a) does not add the curve chart that absorbs circuit, and Fig. 9 (b) is the curve chart that adds the absorption circuit.

Embodiment

A kind of circuit breaker current converter of mixed soft cut-off current-limiting circuit breaker, form by diode-bridge circuit and igbt T1, the collector terminal of igbt T1 is connected with the common cathode end of D2 with diode-bridge circuit D1, the emitter terminal of igbt T1 is connected with the common anode tap of D4 with diode-bridge circuit D3, cross-over connection buffer circuit 1 between the common anode tap of the common cathode end of diode-bridge circuit D1 and D2 and D3 and D4, buffer circuit 1 is by diode D11, resistance R 11 and capacitor C 11 constitute, after being connected in parallel, diode D11 and resistance R 11 be connected in series with capacitor C 11, be connected in parallel at the two ends of the capacitor C 11 of buffer circuit 1 and absorb circuit 2 and reset circuit 3, absorbing circuit 2 is piezo-resistance, its model can be B32k250, reset circuit 3 is made up of igbt T2 and discharge resistance R31, the emitter terminal of igbt T1 is connected with the end of discharge resistance R31, the collector terminal of igbt T1 is connected with an end of buffer circuit 1 capacitor C 11, the other end of discharge resistance R31 is connected with the other end of buffer circuit 1 capacitor C 11, it is the power device of BSM50GB120DN2 that above-mentioned igbt T1 can adopt model, and it is the power device of BSM50GB120DN2 that igbt T2 can adopt model.

Claims (3)

1, a kind of circuit breaker current converter of mixed soft cut-off current-limiting circuit breaker, form by diode-bridge circuit and igbt (T1), the collector terminal of igbt (T1) is connected with the common cathode end of D2 with diode-bridge circuit D1, the emitter terminal of igbt (T1) is connected with the common anode tap of D4 with diode-bridge circuit D3, it is characterized in that cross-over connection buffer circuit (1) between the common anode tap of the common cathode end of diode-bridge circuit D1 and D2 and D3 and D4, buffer circuit (1) is by diode (D11), resistance (R11) and electric capacity (C11) constitute, diode (D11) and resistance (R11) back that is connected in parallel is connected in series with electric capacity (C11), and being connected in parallel at the two ends of the electric capacity (C11) of buffer circuit (1) absorbs circuit (2) and reset circuit (3).
2, the current converter of mixed soft cut-off current-limiting circuit breaker according to claim 1 is characterized in that absorbing circuit (2) and is piezo-resistance.
3, according to the current converter of claim 2 or 3 described mixed soft cut-off current-limiting circuit breakers, it is characterized in that reset circuit (3) is made up of igbt (T2) and discharge resistance (R31), the emitter terminal of igbt (T1) is connected with an end of discharge resistance (R31), the collector terminal of igbt (T1) is connected with an end of buffer circuit (1) electric capacity (C11), and the other end of discharge resistance (R31) is connected with the other end of buffer circuit (1) electric capacity (C11).
CN 200420078281 2004-08-03 2004-08-03 Inversion device of mixed soft-cut current-limited breaker CN2720613Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200420078281 CN2720613Y (en) 2004-08-03 2004-08-03 Inversion device of mixed soft-cut current-limited breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200420078281 CN2720613Y (en) 2004-08-03 2004-08-03 Inversion device of mixed soft-cut current-limited breaker

Publications (1)

Publication Number Publication Date
CN2720613Y true CN2720613Y (en) 2005-08-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200420078281 CN2720613Y (en) 2004-08-03 2004-08-03 Inversion device of mixed soft-cut current-limited breaker

Country Status (1)

Country Link
CN (1) CN2720613Y (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102593809A (en) * 2011-01-14 2012-07-18 同济大学 Solid-state circuit breaker with over-voltage suppressing function
CN103001614A (en) * 2012-11-30 2013-03-27 西安交通大学 Mixing type breaker with selective protection function
CN103117528A (en) * 2013-01-17 2013-05-22 国网智能电网研究院 Series capacitor type high-voltage direct current breaker and control method thereof
CN105493218A (en) * 2013-08-30 2016-04-13 伊顿工业(荷兰)有限公司 Circuit breaker with hybrid switch
CN107946133A (en) * 2017-12-06 2018-04-20 上海电气集团股份有限公司 A kind of quick acting switching-off mechanism and hybrid AC breaker

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102593809A (en) * 2011-01-14 2012-07-18 同济大学 Solid-state circuit breaker with over-voltage suppressing function
CN102593809B (en) * 2011-01-14 2015-06-03 同济大学 Solid-state circuit breaker with over-voltage suppressing function
CN103001614A (en) * 2012-11-30 2013-03-27 西安交通大学 Mixing type breaker with selective protection function
CN103001614B (en) * 2012-11-30 2015-07-15 西安交通大学 Mixing type breaker with selective protection function
CN103117528A (en) * 2013-01-17 2013-05-22 国网智能电网研究院 Series capacitor type high-voltage direct current breaker and control method thereof
CN103117528B (en) * 2013-01-17 2015-12-02 国网智能电网研究院 One seals in capacitive high voltage DC circuit breaker and control method thereof
CN105493218A (en) * 2013-08-30 2016-04-13 伊顿工业(荷兰)有限公司 Circuit breaker with hybrid switch
CN105493218B (en) * 2013-08-30 2018-06-29 伊顿工业(荷兰)有限公司 Breaker with hybrid switch
CN107946133A (en) * 2017-12-06 2018-04-20 上海电气集团股份有限公司 A kind of quick acting switching-off mechanism and hybrid AC breaker

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