CN104934929A - Modularized power electronic high-voltage direct-current circuit breaker - Google Patents

Modularized power electronic high-voltage direct-current circuit breaker Download PDF

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Publication number
CN104934929A
CN104934929A CN201510350310.0A CN201510350310A CN104934929A CN 104934929 A CN104934929 A CN 104934929A CN 201510350310 A CN201510350310 A CN 201510350310A CN 104934929 A CN104934929 A CN 104934929A
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CN
China
Prior art keywords
voltage
igbt
power
power electronic
electric
Prior art date
Application number
CN201510350310.0A
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Chinese (zh)
Inventor
张波
徐琪
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华南理工大学
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Application filed by 华南理工大学 filed Critical 华南理工大学
Priority to CN201510350310.0A priority Critical patent/CN104934929A/en
Publication of CN104934929A publication Critical patent/CN104934929A/en

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Abstract

The invention discloses a modularized power electronic high-voltage direct-current circuit breaker. The modularized power electronic high-voltage direct-current circuit breaker is formed by in series connecting a plurality of hybrid switch modules, wherein each hybrid switch module comprises two mechanical switches, two power electronic switches and a voltage-sharing protective circuit; one mechanical switch is correspondingly in parallel connected with one power electronic switch; and ports of all mechanical switches are in series connected. The modularized power electronic high-voltage direct-current circuit breaker is small in on-state loss; when a circuit normally operates, current only flows through the mechanical switches and does not flow through the power electronic switches, so that loss is hardly generated; the plurality of mechanical switches are in series connected, and voltage stress of single mechanical switch is small; and the voltage-sharing protective circuits can be utilized to solve the non-synchronous voltage-sharing problem when the power electronic switches are conducted. And not only is the modularized power electronic high-voltage direct-current circuit breaker suitable for protection of high-voltage direct-current power transmission, but also the modules can be suitable for industries which use direct-current power.

Description

A kind of modular power electronics high voltage DC breaker

Technical field

The present invention relates to high-voltage power electronic direct current protecting technology, be specifically related to a kind of high-voltage power electronic DC circuit breaker.

Background technology

High voltage DC breaker has hybrid DC circuit breaker (as the hybrid DC circuit breaker that ABB proposes) at present, hybrid DC circuit breaker drop-out current ability and operating voltage grade depend on power electronic device, but due to all-controlling power electronics device single tube rated voltages such as current IGBT, electric current is all limited, at high pressure, under big current application scenario, solve multitube string, the series of technical difficulty such as parallel connection are larger, require very high to the manufacture consistency of IGBT device and synchronous drived control, if one of them IGBT can not conducting together with other IGBT, it will bear whole high pressure and damage, cause the chain damage because bearing high pressure of other IGBT thus.The hybrid DC circuit breaker that ABB proposes, have employed traditional switching technique and semiconductor device, both the shortcoming that pure mechanical high voltage DC breaker switching speed is slow had been solved, solve again the shortcoming that based semiconductor high voltage DC breaker conduction loss is larger, but multiple power electronic device series connection wherein, use lightning arrester to avoid overvoltage, inner power electronic device very easily punctures because of asynchronous conducting.

Summary of the invention

The object of the invention is to overcome above-mentioned the deficiencies in the prior art, solve the voltage-sharing of power electronic device, a kind of modular power electronics high voltage DC breaker is provided.

The present invention is not only applicable to the protection of high voltage direct current transmission, can also be applicable to use galvanic industry.

The present invention can be achieved through the following technical solutions.

A kind of modular power electronics high voltage DC breaker, be made up of multiple hybrid switch block coupled in series, each hybrid switch module comprises two mechanical switchs, two electronic power switches and voltage equalizing protection circuit all separately, and one of them mechanical switch is correspondingly in parallel with an electronic power switch; The port series connection of all described mechanical switchs.

Further optimal enforcement ground, the first electronic power switch comprises an IGBT and the first diode with an IGBT differential concatenation; Second electronic power switch comprises the 2nd IGBT and the second diode with the 2nd IGBT differential concatenation.

Further optimal enforcement ground, voltage equalizing protection circuit comprises the first electric capacitor, the first electric capacitor, the first resistance, the second resistance, the first Power Diode Pumped, the second Power Diode Pumped; Wherein the first electric capacitor negative pole is connected with the first electric power diode positive pole, first electric capacitor positive pole is connected with an IGBT collector electrode respectively and second resistance one end connects, the second resistance other end is connected with the positive pole of the second electric capacitor, and the first electric power diode negative pole is connected with an IGBT emitter; Second electric power diode negative pole second electric capacitor just connects, second electric capacitor negative pole pole is connected with the 2nd IGBT emitter and first resistance one end respectively, the first resistance other end is connected with the negative pole of the first electric capacitor, and the second electric power diode positive pole is connected with the 2nd IGBT collector electrode pole.

The present invention utilizes voltage equalizing protection circuit, and in circuit interrupting process, IGBT can not synchronously conducting, and play the effect that buffering is all pressed, unlikely generation overvoltage, can improve the condition of work of IGBT, increase the service life.

Compared with prior art, tool of the present invention has the following advantages and technique effect:

The present invention is normal, and on-state loss is little, and when circuit normally runs, electric current only flows through mechanical switch, does not flow through electronic power switch, produces loss hardly;

The present invention adopts multiple mechanical switch to connect, and single mechanical switch voltage stress is little;

The present invention utilizes voltage equalizing protection circuit can solve when the nonsynchronous dividing potential drop problem of electronic power switch conducting preferably;

The present invention adopts modular construction, easy to maintenance, damages and only needs to replace respond module; Can be changed flexibly by change number of modules and be applicable to various electric pressure.

Accompanying drawing explanation

Fig. 1 is the hybrid switch module circuit diagram of the high voltage DC breaker of modular power electronics described in example.

Fig. 2 is the high voltage DC breaker of modular power electronics described in example circuit diagram.

Fig. 3 is the circuit diagram of a kind of application example of a kind of modular power electronics high voltage DC breaker mould described in example.

IGBT voltage oscillogram during breaking circuit when Fig. 4 is modular power electronics high voltage DC breaker fault in example.

Embodiment

Below in conjunction with accompanying drawing and example, specific embodiment of the invention is described further, but enforcement of the present invention and protection range are not limited thereto.

As shown in Figure 2, a kind of modular power electronics high voltage DC breaker, is composed in series by multiple hybrid switch module 1.

As shown in Figure 1, each hybrid switch module comprises two mechanical switchs (K1, K2), two electronic power switches and voltage equalizing protection circuit all separately, and one of them mechanical switch is correspondingly in parallel with an electronic power switch; The port series connection of all described mechanical switchs.First electronic power switch comprises an IGBTT1 and the first diode D3 with an IGBTT1 differential concatenation; Second electronic power switch comprises the 2nd IGBTT2 and the second diode D4 with the 2nd IGBTT2 differential concatenation.Voltage equalizing protection circuit comprises the first electric capacitor C1, the first electric capacitor C2, the first resistance R1, the second resistance R2, the first Power Diode Pumped D1, the second Power Diode Pumped D2; Wherein the first electric capacitor C1 negative pole is connected with the first electric power diode positive pole, first electric capacitor C1 positive pole is connected with an IGBTT1 collector electrode respectively and second resistance R2 one end connects, the second resistance R2 other end is connected with the positive pole of the second electric capacitor C2, and the first electric power diode D1 negative pole is connected with an IGBTT1 emitter; Second electric power diode D2 negative pole second electric capacitor C2 just connects, second electric capacitor C2 negative pole pole is connected with the 2nd IGBTT2 emitter and first resistance R1 one end respectively, the first resistance R1 other end is connected with the negative pole of the first electric capacitor C1, and the second electric power diode D2 positive pole is connected with the 2nd IGBTT2 collector electrode pole.

As shown in Figure 3, the modular power electronics high voltage DC breaker be composed in series by multiple hybrid switch module 1 in application example, is connected on both ends of power.Separately there is isolating switch K0, its effect is isolation voltage after circuit shut-down, circuit main line access current-limiting circuit, described current-limiting circuit comprises current-limiting inductance L0 and buffer circuit, buffer circuit comprises the 3rd diode D0, the 3rd resistance R0, described current-limiting inductance one end is connected with one end of the 3rd resistance R0 and outflow of bus current end respectively, and the 3rd resistance R0 other end is connected with the 3rd diode D0 positive pole, and the other end of the 3rd diode D0 negative pole and current-limiting inductance flows into end with electric current respectively and connects.

Current-limiting circuit object is that limiting short-circuit current rises.

Below sketch the operation principle of modular power electronics high voltage DC breaker.

In normal work period, the mechanical switch conducting of hybrid switch module, the electronic power switch of hybrid switch module turns off, and now electric current flows through mechanical switching circuit connection.

If modular power electronics high voltage DC breaker circuit breaker receives trip signal, the first action tripping operation of mechanical switch, its fracture produces electric arc, then IGBT successive conductive, and voltage equalizing protection circuit charges in the process, serve the effect that buffering is all pressed, after the whole conducting of IGBT, electric current flows to IGBT in module by mechanical switch, mechanical switch fracture arc extinction, arc extinction, turns off short circuit current; Send after arc extinction and turn off IGBT signal, now IGBT turns off in succession, and in like manner, the charging of buffering equalizer circuit, to steady state voltage, now circuit turns off completely.

The circuit of Fig. 3 is tested, with verify its its all press effect, this example obtains the IGBT voltage oscillogram as Fig. 4.

Abscissa is time shaft, and ordinate is IGBT voltage.

T1 moment DC loop is short-circuited; T2 moment mechanical switch trips, but two-port lights electric arc;

T3-t4 moment IGBT successive conductive, buffering equalizer circuit charges by nought state, and from oscillogram, IGBT voltage increases by zero, can not produce overvoltage;

The blow-out of t4-t5 mechanical switch, turns off short circuit current;

In the t5-t6 time, IGBT turns off in succession, all presses buffer circuit to be charged to steady-state value.

Claims (3)

1. a modular power electronics high voltage DC breaker, it is characterized in that being made up of multiple hybrid switch block coupled in series, each hybrid switch module comprises two mechanical switchs, two electronic power switches and voltage equalizing protection circuit all separately, and one of them mechanical switch is correspondingly in parallel with an electronic power switch; The port series connection of all described mechanical switchs.
2. modular power electronics high voltage DC breaker according to claim 1, it is characterized in that: in two electronic power switches, the first electronic power switch comprises an IGBT (T1) and the first diode (D3) with IGBT (T1) differential concatenation; Second electronic power switch comprises the 2nd IGBT (T2) and the second diode (D4) with the 2nd IGBT (T2) differential concatenation.
3. modular power electronics high voltage DC breaker according to claim 1, is characterized in that: voltage equalizing protection circuit comprises the first electric capacitor (C1), the first electric capacitor (C2), the first resistance (R1), the second resistance (R2), the first Power Diode Pumped (D1), the second Power Diode Pumped (D2); Wherein the first electric capacitor (C1) negative pole is connected with the first electric power diode positive pole, first electric capacitor (C1) positive pole is connected with IGBT (T1) collector electrode respectively and the second resistance (R2) one end connects, second resistance (R2) other end is connected with the positive pole of the second electric capacitor (C2), and the first electric power diode (D1) negative pole is connected with IGBT (T1) emitter; Second electric power diode (D2) negative pole second electric capacitor (C2) just connects, second electric capacitor (C2) negative pole pole is connected with the 2nd IGBT (T2) emitter and the first resistance (R1) one end respectively, first resistance (R1) other end is connected with the negative pole of the first electric capacitor (C1), and the second electric power diode (D2) positive pole is connected with the 2nd IGBT (T2) collector electrode pole.
CN201510350310.0A 2015-06-23 2015-06-23 Modularized power electronic high-voltage direct-current circuit breaker CN104934929A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510350310.0A CN104934929A (en) 2015-06-23 2015-06-23 Modularized power electronic high-voltage direct-current circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510350310.0A CN104934929A (en) 2015-06-23 2015-06-23 Modularized power electronic high-voltage direct-current circuit breaker

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CN104934929A true CN104934929A (en) 2015-09-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109638761A (en) * 2018-12-12 2019-04-16 西安西电电力系统有限公司 Hybrid dc circuit breaker

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202444695U (en) * 2012-02-16 2012-09-19 福建龙净环保股份有限公司 RCD (Resistance, Capacitance and Diode) buffer circuit printed substrate, buffer circuit board and buffer circuit
CN102916637A (en) * 2012-11-08 2013-02-06 沈阳创达技术交易市场有限公司 Bridge type driving and resistor, capacitor and diode (RCD) buffering circuit of brushless direct current motor
CN103066809A (en) * 2012-12-06 2013-04-24 国网智能电网研究院 Improved residual current device (RCD) buffer circuit applied to direct tandem type insulated gate bipolar translator (IGBT)
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
CN103647248A (en) * 2013-11-14 2014-03-19 许继集团有限公司 High-voltage DC rapid breaker
CN104009450A (en) * 2014-05-07 2014-08-27 华南理工大学 Module combination high-voltage direct-current breaker
CN204761002U (en) * 2015-06-23 2015-11-11 华南理工大学 Modularization power electronic high voltage direct current circuit breaker

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202444695U (en) * 2012-02-16 2012-09-19 福建龙净环保股份有限公司 RCD (Resistance, Capacitance and Diode) buffer circuit printed substrate, buffer circuit board and buffer circuit
CN102916637A (en) * 2012-11-08 2013-02-06 沈阳创达技术交易市场有限公司 Bridge type driving and resistor, capacitor and diode (RCD) buffering circuit of brushless direct current motor
CN103066809A (en) * 2012-12-06 2013-04-24 国网智能电网研究院 Improved residual current device (RCD) buffer circuit applied to direct tandem type insulated gate bipolar translator (IGBT)
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
CN103647248A (en) * 2013-11-14 2014-03-19 许继集团有限公司 High-voltage DC rapid breaker
CN104009450A (en) * 2014-05-07 2014-08-27 华南理工大学 Module combination high-voltage direct-current breaker
CN204761002U (en) * 2015-06-23 2015-11-11 华南理工大学 Modularization power electronic high voltage direct current circuit breaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109638761A (en) * 2018-12-12 2019-04-16 西安西电电力系统有限公司 Hybrid dc circuit breaker

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