CN100382217C - Transverter of mixed soft cut-off current-limiting circuit breaker - Google Patents
Transverter of mixed soft cut-off current-limiting circuit breaker Download PDFInfo
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- CN100382217C CN100382217C CNB2004100415627A CN200410041562A CN100382217C CN 100382217 C CN100382217 C CN 100382217C CN B2004100415627 A CNB2004100415627 A CN B2004100415627A CN 200410041562 A CN200410041562 A CN 200410041562A CN 100382217 C CN100382217 C CN 100382217C
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Abstract
The present invention relates to a conversion device of a mixed soft-cut current-limited breaker, particularly to the conversion device of the mixed soft-cut current-limited breaker used by the circuit breakers, which is composed of diode bridge circuits and an insulated gate bipolar transistor T1, wherein the collector terminals of the insulated gate bipolar transistor are connected with the common-cathode terminals of the diode bridge circuit D1 and D2, and the emitter terminals of the insulated gate bipolar transistor are connected with the common-anode terminals of the diode bridge circuit D3 and D4. The present invention is characterized in that a buffer circuit 1 is connected between the common-cathode terminals of the diode bridge circuits D1 and D2 and the common-anode terminals of the diode bridge circuits 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
Technical field
The invention belongs to the power transmission and distribution device, relate 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 invention 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 present invention 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 present invention has following advantage:
The present invention 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 a commutation circuit topology structure chart of the present invention.
Fig. 2 is a converter circuit schematic diagram of the present invention.
Fig. 3 has used mixing type current-limiting circuit breaker functional schematic of the present invention.
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. 6 (a) does not add the curve chart that absorbs circuit, and Fig. 6 (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 T2 in the reset circuit 3 is connected with the end of discharge resistance R31, the collector terminal of igbt T2 in the reset circuit 3 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 the igbt T2 in the reset circuit 3 can adopt model.
Claims (3)
1. a circuit breaker is with the current converter of mixed soft cut-off current-limiting circuit breaker, form by diode-bridge circuit and igbt (hole), 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 the igbt (T2) in the reset circuit (3) is connected with an end of discharge resistance (R31), the collector terminal of the igbt (T2) in the reset circuit (3) 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).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CNB2004100415627A CN100382217C (en) | 2004-07-30 | 2004-07-30 | Transverter of mixed soft cut-off current-limiting circuit breaker |
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Application Number | Priority Date | Filing Date | Title |
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CNB2004100415627A CN100382217C (en) | 2004-07-30 | 2004-07-30 | Transverter of mixed soft cut-off current-limiting circuit breaker |
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CN1598988A CN1598988A (en) | 2005-03-23 |
CN100382217C true CN100382217C (en) | 2008-04-16 |
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CNB2004100415627A Expired - Fee Related CN100382217C (en) | 2004-07-30 | 2004-07-30 | Transverter of mixed soft cut-off current-limiting circuit breaker |
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CN102684230A (en) * | 2012-06-14 | 2012-09-19 | 浙江大学 | Compound complete control solid state switch applied to high-voltage high-capacity alternating/direct current power transmission and distribution system |
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CN105262068A (en) * | 2015-10-14 | 2016-01-20 | 南京南瑞继保电气有限公司 | High-voltage DC breaker and control method thereof |
CN105356411B (en) * | 2015-11-10 | 2018-03-13 | 南京南瑞继保电气有限公司 | A kind of bridge circuit, high voltage DC breaker and its control method |
CN106771904B (en) * | 2016-11-30 | 2021-06-11 | 中国电力科学研究院 | System and method for performing impact test on controllable lightning arrester in extra-high voltage environment based on time sequence |
CN107896101B (en) * | 2017-10-25 | 2019-10-29 | 清华大学 | A kind of composite switch based on coupling negative pressure circuit |
CN107819460B (en) * | 2017-10-25 | 2019-10-29 | 清华大学 | A kind of composite switch based on coupling negative pressure circuit |
CN107896102B (en) * | 2017-10-25 | 2020-09-08 | 清华大学 | Hybrid switch with main channel connected with solid-state switch in series |
CN107769370A (en) * | 2017-10-25 | 2018-03-06 | 清华大学 | A kind of solid state switch based on diode series-parallel connection bridge |
CN107846211B (en) * | 2017-10-25 | 2020-09-08 | 清华大学 | Hybrid switch with main path connected in series with solid-state switch |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN87204010U (en) * | 1987-03-17 | 1988-04-06 | 卢尊甫 | Multifunctional speedy fault circuit breaker |
CN1153988A (en) * | 1995-09-12 | 1997-07-09 | 斯维则工程实验室公司 | Hybrid circuit using miller effect for protection of electrical contacts from arcing |
CN1170214A (en) * | 1996-04-29 | 1998-01-14 | 斯维则工程实验室公司 | Two terminal active arc suppressor |
-
2004
- 2004-07-30 CN CNB2004100415627A patent/CN100382217C/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN87204010U (en) * | 1987-03-17 | 1988-04-06 | 卢尊甫 | Multifunctional speedy fault circuit breaker |
CN1153988A (en) * | 1995-09-12 | 1997-07-09 | 斯维则工程实验室公司 | Hybrid circuit using miller effect for protection of electrical contacts from arcing |
CN1170214A (en) * | 1996-04-29 | 1998-01-14 | 斯维则工程实验室公司 | Two terminal active arc suppressor |
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CN1598988A (en) | 2005-03-23 |
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