CN108521117B - A kind of change of current branch for dc circuit breaker - Google Patents
A kind of change of current branch for dc circuit breaker Download PDFInfo
- Publication number
- CN108521117B CN108521117B CN201810369060.9A CN201810369060A CN108521117B CN 108521117 B CN108521117 B CN 108521117B CN 201810369060 A CN201810369060 A CN 201810369060A CN 108521117 B CN108521117 B CN 108521117B
- Authority
- CN
- China
- Prior art keywords
- module
- thyristor
- diode
- capacitance
- transformer
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
Abstract
The invention discloses a kind of change of current branches for dc circuit breaker, including the first leading-out terminal, second leading-out terminal, trigger device, inductor module, resistive module, capacitance module and thyristor module, wherein, first leading-out terminal is connected with one end of inductor module, second leading-out terminal is connected with one end of capacitance module, the other end of inductor module is successively connected through resistive module and thyristor module with the other end of capacitance module, the output end of trigger device is connected with the control terminal of thyristor module, the change of current branch can effectively reduce the turn-off delay of breaker, and contact is hardly damaged when disconnecting, fault clearing time is short.
Description
Technical field
The present invention relates to a kind of change of current branches, and in particular to a kind of change of current branch for dc circuit breaker.
Background technique
Direct current defeated (matching) electricity has line loss is low, runs simultaneously stability there is no system to ask compared with exchanging defeated (matching) electricity
The series of advantages such as topic.Fast DC Circuit Breaker is to guarantee direct current transmission and distribution system and DC grid safety and stability reliability service
Key technology.Unlike AC system, natural zero-crossing point is not present in the electric current of direct current system, therefore can not in direct current system
The natural zero-crossing point of electric current is equally utilized to turn off to AC system, the problem of cut-offfing of DC current, which is always one, is worth research
Project.
Currently, conventional machinery formula dc circuit breaker is the dc circuit breaker formed using exchange mechanical switch, by artificial
Current zero-crossing point is completed direct current and is cut-off, or limitation electric current realizes the reliable disjunction of electric current to sufficiently small.Mechanical direct current is disconnected
Road device artificial current zero mainly includes the methods of self-oscillation method and precharge succusion, and self-oscillation method structure is simple, but opens
Disconnected time and loop parameter are closely related, and turn-off delay is too long, could form artificial zero point after generally needing a few tens of milliseconds.Preliminary filling
Electric oscillation method is that the one kind more paid close attention in recent years cut-offs mode, is pre-charged succusion change of current branch at present and is opened using triggering gas
It closes, but due to the limitation of self structure, the electric arc contact easy to damage that when disconnection generates, and the fault current mute time is relatively
It is long.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of change of current for dc circuit breaker is provided
Branch, the change of current branch can effectively reduce the turn-off delay of breaker, and while disconnecting is hardly damaged contact, failure removal
Time is short.
In order to achieve the above objectives, the change of current branch of the present invention for dc circuit breaker include the first leading-out terminal,
Second leading-out terminal, trigger device, inductor module, resistive module, capacitance module, thyristor module, wherein the first leading-out terminal
Be connected with one end of inductor module, the second leading-out terminal is connected with one end of capacitance module, the other end of inductor module according to
It is secondary to be connected through resistive module and thyristor module with the other end of capacitance module, the output end and thyristor module of trigger device
Control terminal be connected.
Thyristor module is formed in parallel by several grades of thyristors, wherein the output end and first order thyristor of trigger device
Gate pole be connected.
Each equal reverse parallel connection of thyristor has first diode.
Each thyristor is respectively connected with static state voltage equipoise and dynamic voltage-balancing.
The static state voltage equipoise and dynamic voltage-balancing include the second diode, third diode, equalizing capacitance, the first electricity
Resistance, second resistance and transformer, wherein one end of transformer primary winding is successively through equalizing capacitance and first resistor and corresponding crystalline substance
The anode of brake tube is connected, and one end of transformer secondary winding is connected with the cathode of the anode of the second diode and third diode
It connects, the cathode of the second diode is connected with the gate pole of corresponding thyristor, the other end of the primary side winding of transformer, transformer pair
The other end of side winding and the anode of third diode are connected with the cathode of corresponding thyristor, the both ends difference of second resistance
It is connected with the anode of corresponding thyristor and cathode.
The invention has the following advantages:
Change of current branch of the present invention for dc circuit breaker substitutes traditional triggering gas with thyristor module and opens
Close, to reduce the turn-on time of change of current branch, reduce the time of fault current excision and the open circuit delay of breaker, controllability and
The problems such as flexibility is preferable, while the thyristor module is triggered by trigger device, and arc extinction is not present, when disconnection
It is hardly damaged contact, significantly increases the service life of change of current branch.
Further, thyristor module is formed in parallel by several grades of thyristors, by triggering to level-one thyristor
Entire thyristor module is connected, reduces the entirety requirement to trigger device, reduces the volume of trigger device, that improves triggering can
By property.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram of thyristor module K in the present invention；
Fig. 3 is the circuit diagram of dc circuit breaker；
Fig. 4 a is mechanical switch branch and change of current branch current variation diagram in embodiment；
Fig. 4 b is main circuit current variation diagram in embodiment；
Fig. 4 c is change of current branch capacitance module both end voltage variation diagram in embodiment.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, the change of current branch of the present invention for dc circuit breaker includes the first leading-out terminal, the second extraction
Terminal, trigger device W, inductor module L, resistive module R, capacitance module C and thyristor module K, wherein the first leading-out terminal with
One end of main mechanical switch in dc circuit breaker, in dc circuit breaker one end of voltage limiting device module MOV and inductor module L one
End is connected, voltage limiting device mould in the other end, dc circuit breaker of main mechanical switch in the second leading-out terminal and dc circuit breaker
The other end of block MOV and one end of capacitance module C are connected, and the other end of inductor module L is successively through resistive module R and thyristor
Module K is connected with the other end of capacitance module C, and the output end of trigger device W is connected with the control terminal of thyristor module K.
With reference to Fig. 2, thyristor module K is formed in parallel by several grades of thyristor Q, wherein the output end of trigger device W and
The gate pole of level-one thyristor Q is connected；Each equal reverse parallel connection of thyristor Q has first diode D1, wherein each thyristor Q connects
It is connected to static state voltage equipoise and dynamic voltage-balancing, the static state voltage equipoise and dynamic voltage-balancing include the second diode D2, third
Diode D3, equalizing capacitance C1, first resistor R1, second resistance R2 and transformer T, wherein one end of transformer T primary side winding
Successively be connected through equalizing capacitance C1 and first resistor R1 with the anode of corresponding thyristor Q, one end of transformer T vice-side winding with
The anode of second diode D2 and the cathode of third diode D3 are connected, the cathode of the second diode D2 and corresponding thyristor Q
Gate pole be connected, the other end of the primary side winding of transformer T, the other end of transformer T vice-side winding and third diode D3
Anode be connected with the cathode of corresponding thyristor Q, the both ends of second resistance R2 respectively with the anode and yin of corresponding thyristor Q
Pole is connected.
When DC power transmission line operates normally, the main mechanical switch of dc circuit breaker is closed state；When detecting route
When short trouble, the main mechanical switch of dc circuit breaker is begun breaking, and is drawn in main mechanical switch main fracture contact to maximum distance
When, the thyristor module K of change of current branch receives trigger signal, and the capacitance module C of change of current branch passes through voltage limiting device module MOV
It discharges with main mechanical switch, the access where main mechanical switch provides an electric current contrary with transmission current, makes host
The current over-zero of access where tool switch, main mechanical switch cease arc, and access disconnects where main mechanical switch.Fault current is transferred to
Change of current branch charges to the capacitance module C of change of current branch, when capacitance module C both end voltage rises to voltage limiting device module MOV limit
When definite value, electric current switches to where voltage limiting device module MOV on access from change of current branch access, and finally stores in consumption system
Energy, so far dc circuit breaker complete interrupting process.
Referring to fig. 2, after first order thyristor Q receives trigger signal in thyristor module K, first order thyristor Q is led
Logical, then other grade of thyristor Q both end voltage increases, and since the voltage at the both ends equalizing capacitance C1 cannot be mutated, therefore dynamic voltage balancing returns
There is the charging current to equalizing capacitance C1 in road, charging current flows through the primary side winding of transformer T, induces in vice-side winding
Electric current enters the gate pole of thyristor Q by the second diode D2, triggers other grade of thyristor Q in addition to the first order, and be allowed to
Conducting.After thyristor module K conducting, when electric current is positive, electric current is circulated by thyristor Q, at this point, equalizing capacitance C1 passes through
Thyristor Q discharges；When the current flow is reversed, electric current then passes through reverse parallel connection first diode D1 circulation, and thyristor Q is closed at this time
It is disconnected；In reverse current zero crossing, voltage should be positive maximum value at this time, if thyristor Q is off state, thyristor at this time
There are biggish forward voltages at the both ends of module K, and similarly, since the voltage at the both ends equalizing capacitance C1 cannot be mutated, therefore dynamic is
It pushes back there is the charging current to equalizing capacitance C1 in road, charging current flows through the primary side winding of transformer T, and in transformer
The vice-side winding of T induces electric current, to realize the triggering again to thyristor module K, thyristor module K is connected.
With reference to Fig. 3, the present invention is used for the circuit diagram of dc circuit breaker, and power supply DC is converter station, L1For smoothing reactor, K1
And K2For disconnecting switch, the first leading-out terminal and disconnecting switch K1One end connection, disconnecting switch K1The other end and DC transmission line
One end connection；Second leading-out terminal and disconnecting switch K2One end connection, disconnecting switch K2The other end and DC transmission line
One end connection.
Embodiment
By taking practical 10kV direct-flow distribution system as an example, simulation calculation is carried out.It is located at the moment breaker exit 1ms hair
Raw short trouble, dc circuit breaker main fracture electric current are ramped with given pace.At this point, breaker starts to cut-off, main mechanical
It is about 3ms that switch contact, which pulls open the maximum distance time, at this point, thyristor Q receives trigger signal, third is through-flow, and circuit is closed
It closes, capacitance module C electric discharge, calculated result is as shown in Fig. 4 a to Fig. 4 c, it is known that, about at the 4.1ms moment, main fracture electric current was generated
Zero point, breaker cease arc.
Claims (2)
1. a kind of change of current branch for dc circuit breaker, which is characterized in that including the first leading-out terminal, the second leading-out terminal,
Trigger device (W), inductor module (L), resistive module (R), capacitance module (C) and thyristor module (K), wherein first draws
Terminal is connected with the one end of inductor module (L), the second leading-out terminal with and one end of capacitance module (C) be connected, inductance mould
The other end of block (L) is successively connected through resistive module (R) and thyristor module (K) with the other end of capacitance module (C), triggering
The output end of device (W) is connected with the control terminal of thyristor module (K)；
Thyristor module (K) is connected in series by several grades of thyristors (Q), wherein the output end and the first order of trigger device (W) are brilliant
The gate pole of brake tube (Q) is connected；
Each thyristor (Q) is respectively connected with static state voltage equipoise and dynamic voltage-balancing；
The static state voltage equipoise and dynamic voltage-balancing include the second diode (D2), third diode (D3), equalizing capacitance
(C1), first resistor (R1), second resistance (R2) and transformer (T), wherein one end of transformer (T) primary side winding successively passes through
Equalizing capacitance (C1) and first resistor (R1) are connected with the anode of corresponding thyristor (Q), one end of transformer (T) vice-side winding
Be connected with the cathode of the anode of the second diode (D2) and third diode (D3), the cathode of the second diode (D2) with it is corresponding
The gate pole of thyristor (Q) is connected, the other end of the primary side winding of transformer (T), the other end of transformer (T) vice-side winding and
The anode of third diode (D3) is connected with the cathode of corresponding thyristor (Q), the both ends of second resistance (R2) respectively with it is right
The anode and cathode for answering thyristor (Q) are connected.
2. the change of current branch according to claim 1 for dc circuit breaker, which is characterized in that each thyristor (Q) is anti-
To being parallel with first diode (D1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810369060.9A CN108521117B (en) | 2018-04-23 | 2018-04-23 | A kind of change of current branch for dc circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810369060.9A CN108521117B (en) | 2018-04-23 | 2018-04-23 | A kind of change of current branch for dc circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108521117A CN108521117A (en) | 2018-09-11 |
| CN108521117B true CN108521117B (en) | 2019-11-08 |
Family
ID=63429055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810369060.9A Active CN108521117B (en) | 2018-04-23 | 2018-04-23 | A kind of change of current branch for dc circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108521117B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111371441A (en) * | 2020-03-26 | 2020-07-03 | 思源电气股份有限公司 | Controllable turn-off mechanical direct current circuit breaker |
| CN112670112A (en) * | 2020-12-24 | 2021-04-16 | 广东电网有限责任公司云浮供电局 | Hybrid lossless alternating current fast switch and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0589753A (en) * | 1991-09-30 | 1993-04-09 | Toshiba Corp | Direct current breaker |
| JPH0917294A (en) * | 1995-06-28 | 1997-01-17 | Mitsubishi Electric Corp | Two-way dc circuit breaker |
| CN104779593A (en) * | 2015-04-22 | 2015-07-15 | 中国船舶重工集团公司第七一二研究所 | Direct-current solid circuit breaker and control method thereof |
| CN106300301A (en) * | 2016-10-12 | 2017-01-04 | 清华大学 | Two-way mechanical formula dc circuit breaker based on change of current drive circuit and control method thereof |
| CN107171279A (en) * | 2017-06-05 | 2017-09-15 | 国家电网公司 | A kind of mixed type dc circuit breaker and its method for dividing |
-
2018
- 2018-04-23 CN CN201810369060.9A patent/CN108521117B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0589753A (en) * | 1991-09-30 | 1993-04-09 | Toshiba Corp | Direct current breaker |
| JPH0917294A (en) * | 1995-06-28 | 1997-01-17 | Mitsubishi Electric Corp | Two-way dc circuit breaker |
| CN104779593A (en) * | 2015-04-22 | 2015-07-15 | 中国船舶重工集团公司第七一二研究所 | Direct-current solid circuit breaker and control method thereof |
| CN106300301A (en) * | 2016-10-12 | 2017-01-04 | 清华大学 | Two-way mechanical formula dc circuit breaker based on change of current drive circuit and control method thereof |
| CN107171279A (en) * | 2017-06-05 | 2017-09-15 | 国家电网公司 | A kind of mixed type dc circuit breaker and its method for dividing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108521117A (en) | 2018-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2017071413A1 (en) | Synthesis circuit and method for testing direct current circuit breaker by means of composite injection of high voltage and large current | |
| CN106549357A (en) | A kind of magnetic field impulse sensing transfer type dc circuit breaker and its using method | |
| CN107834505B (en) | The artificial zero passage high voltage DC breaker of current-limiting type self-charging type and its cutoff method | |
| CN106771947A (en) | A kind of detection circuit and its detection method for IGBT surge currents | |
| CN109360764B (en) | A kind of direct current vacuum circuit breaker | |
| CN108448548A (en) | A kind of combined DC breaker and its control method based on recharged capacitance | |
| CN108521117B (en) | A kind of change of current branch for dc circuit breaker | |
| CN105680411A (en) | DC solid state circuit breaker and broken circuit control method | |
| CN103746553B (en) | High pressure DC-DC converter and control method | |
| CN103457256A (en) | Direct-current breaker used for multi-terminal direct-current system and control method thereof | |
| CN100470991C (en) | Fault current limiter DC control system | |
| CN206962457U (en) | The new fling-cut switch of secondary capacitor | |
| CN112103925A (en) | Multi-port hybrid direct-current circuit breaker and control method | |
| CN203377777U (en) | A soft start circuit of an auxiliary power supply | |
| CN104578093A (en) | Phase-controlled switch peak zero-cross-switching inrush current control circuit and control method | |
| CN108092243B (en) | A kind of hybrid dc circuit breaker of capacitive buffer type | |
| CN205489519U (en) | High -power direct current breaker of high voltage | |
| CN206117139U (en) | Transition magnetic pulse induction type current transfer circuit | |
| CN112865055A (en) | Inductive coupling type direct current fault current limiter and control method thereof | |
| CN103107046A (en) | Relay drive circuit | |
| CN204304445U (en) | A kind of phased switch peak value operating passing zero Inrush control circuit | |
| CN106300308A (en) | A kind of transition magnetic field impulse induction type current carry circuit and using method thereof | |
| CN208226541U (en) | A kind of controllable cathode ground connection and buffer circuit and photovoltaic inverting system | |
| CN210744722U (en) | Arcless direct current breaker topology based on soft switching technology | |
| CN206820452U (en) | A kind of controlling switch in circuit breaker control circuit of transformer substation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210630 Address after: 710054 no.10102, building 1, No.99 Yanxiang Road, Yanta District, Xi'an City, Shaanxi Province Patentee after: ZPJ ELECTRIC Co.,Ltd. Address before: Beilin District Xianning West Road 710049, Shaanxi city of Xi'an province No. 28 Patentee before: XI'AN JIAOTONG University |
|
| TR01 | Transfer of patent right |