CN105244849B - A kind of method and apparatus of the overcurrent protection of IGCT rectifier - Google Patents
A kind of method and apparatus of the overcurrent protection of IGCT rectifier Download PDFInfo
- Publication number
- CN105244849B CN105244849B CN201510829687.4A CN201510829687A CN105244849B CN 105244849 B CN105244849 B CN 105244849B CN 201510829687 A CN201510829687 A CN 201510829687A CN 105244849 B CN105244849 B CN 105244849B
- Authority
- CN
- China
- Prior art keywords
- igct
- protection
- current
- threshold value
- rectifier
- 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.)
- Expired - Fee Related
Links
Landscapes
- Protection Of Static Devices (AREA)
Abstract
The present invention provides a kind of when system failure electric current is excessive, also can be avoided the method and apparatus of the overcurrent protection to the IGCT IGCT rectifier damaged.The method is the current signal for receiving the rectifier of multichannel different delay acquisition；According to current signal and the corresponding threshold value of the acquisition of each road be compared as a result, forming multi-stage protection in timing.Described device includes the short-circuit protection circuit plate of multichannel opto-coupler chip, for acquiring H bridge rectifier current signal of the multichannel based on IGCT；Current regulating circuit, for acquiring H bridge rectifier current signal of the multichannel based on IGCT；First chip, the current signal for being acquired according to the multichannel opto-coupler chip and current regulating circuit of connection issue protection control signal；Second chip, the current signal for being acquired according to the current regulating circuit of connection issue protection control signal；Wherein, the response time for the protection control signal that first chip and the second chip issue is different.
Description
Technical field
The present invention relates to the overcurrent protection of rectifier, the specially a kind of method and dress of the overcurrent protection of IGCT rectifier
It sets.
Background technique
Integral gate change transistor IGCT has big high pressure resistant, electrical current, high reliablity, loss low, compact-sized
The advantages that device for high-power power electronic, but be constrained to the inherent characteristic of IGCT, lead to exception in reply short trouble etc.
When the operating condition of high current, it need to carry out quickly protecting response, otherwise execute shutdown again after electric current exceeds maximum controllable current
Protection act will lead to IGCT device failure.Meanwhile when system power is no more than the overload curves allowed, overcurrent protection system
System should not malfunction.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of when system failure electric current is excessive, also can be avoided
To the method and apparatus of the overcurrent protection of the IGCT IGCT rectifier damaged.
The present invention is to be achieved through the following technical solutions:
A kind of method of the overcurrent protection of IGCT rectifier receives the electric current letter of the rectifier of multichannel different delay acquisition
Number；According to current signal and the corresponding threshold value of the acquisition of each road be compared as a result, forming multi-stage protection in timing.
Preferably, the current signal of the rectifier of multichannel different delay acquisition passes through current regulating circuit respectively and short circuit is protected
Opto-coupler chip in protection circuit plate collects.
Further, the value of the current signal of the rectifier acquired by current regulating circuit and the first order of setting protect threshold
Value compares；If it is greater, then issuing the cut-off signals of IGCT after delay；Wherein, first order protection threshold value is IGCT rectifier volume
Numerical value between 1.2 times to 2 times of constant current.
Further, the value of the current signal of the rectifier acquired by current regulating circuit and the second level of setting are protected
Threshold value comparison；If it is greater, then issuing the cut-off signals of IGCT；Wherein, protection threshold value in the second level is the specified electricity of IGCT rectifier
Numerical value between 2 times of maximum controllable current values to IGCT of stream.
Further, the value of the current signal of the rectifier acquired by opto-coupler chip and the third level of setting protect threshold value
Compare；If it is greater, then receiving fault level energizing signal by the processing chip being arranged and issuing the open signal of IGCT；Its
In, the third level protects maximum controllable current value of the threshold value equal to or slightly less than IGCT.
Further, the current signal of every road acquisition includes two branches；The value of the current signal of each branch is used respectively
In subsequent compared with corresponding threshold value；One of branch is used to acquire the input current value of source side in IGCT rectifier；Separately
One branch is for acquiring IGCT rectifier median generatrix DC current values.
Further, comparison step and corresponding protection containing first order protection threshold value are executed using DSP processing chip
The step of operation；
Comparison step containing third level protection threshold value is executed using CPLD or FPGA processing chip or contains second simultaneously
The comparison step of grade protection threshold value and third level protection threshold value, and the step of executing corresponding protection operation.
A kind of overcurrent protective device of IGCT rectifier, the short-circuit protection circuit plate including multichannel opto-coupler chip, for adopting
Collect H bridge rectifier current signal of the multichannel based on IGCT；Current regulating circuit is rectified for acquiring multichannel based on the H bridge of IGCT
Device current signal；First chip, the current signal for being acquired according to the multichannel opto-coupler chip and current regulating circuit of connection, hair
Protection control signal out；Second chip, the current signal for being acquired according to the current regulating circuit of connection issue protection control
Signal；Wherein, the response time for the protection control signal that first chip and the second chip issue is different.
Preferably, the first chip is CPLD chip or fpga chip；Second chip is dsp chip.
Compared with prior art, the invention has the following beneficial technical effects:
The present invention is based on the overcurrent protections of the H bridge rectifier of IGCT, pass through current regulating circuit and short-circuit protection electricity respectively
The different hardware acquisition component of road plate is arranged, and forms different acquisition times；Also pass through different disposal ability and response speed
Chip executes the contrast operation of different acquisition signals, and then forms the response operation of different delay, thus in timing
Upper formation protection.
Further, current value different classes of in IGCT rectifier is acquired using different branch, respectively and not
Threshold value with level is compared, applied widely, stable and reliable in work.
Detailed description of the invention
Fig. 1 is flow chart described in the embodiment of the present invention.
Fig. 2 is the block diagram of apparatus structure described in the embodiment of the present invention；
Fig. 3 is the structure chart of the IGCT of H bridge in the embodiment of the present invention；
Fig. 4 is the circuit structure diagram of the opto-coupler chip in the embodiment of the present invention in short-circuit protection circuit plate.
Fig. 5 is the circuit structure diagram of current regulating circuit in the embodiment of the present invention.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
Referring to Fig. 1, the embodiment of the present invention provides a kind of method of the overcurrent protection of IGCT rectifier, comprising:
S11: the current signal of the rectifier of multichannel different delay acquisition is received；
S12: it is compared according to the current signal that each road acquires with corresponding threshold value, according to comparison result, in timing
Form multi-stage protection.
By the scheme in the above embodiments, through the current signal of multi pass acquisition compared with threshold value, multichannel is formed
The circuit protection of different delay.In the signal of multichannel, including the response time than passing through the rectification of opto-coupler chip acquisition faster
The current signal of device；It further include the current signal of the rectifier acquired by current regulating circuit.
Correspondingly, the protection after the threshold value compared, and comparison is not also identical.
The signal of acquisition is the current signal of the rectifier acquired by current regulating circuit；Comparison procedure includes: will be logical
Threshold value comparison is protected in the value of the current signal of the rectifier of overcurrent conditioning circuit acquisition and the second level of setting: if it does,
Then issue the cut-off signals of IGCT；Wherein, the second level protection threshold value is the specified of the rectifier systems of IGCT composition
2 times of electric current are worth to the numerical value between the maximum controllable current value of IGCT.
Threshold value comparison is protected using the value of the current signal of the rectifier acquired by opto-coupler chip and the third level of setting；
If it is greater, then the fault level energizing signal received by the first chip and the open signal for issuing IGCT；Wherein, described
Three-level protective threshold value is equal to or slightly less than the maximum controllable current value of the IGCT.
Above-mentioned rear two-way current signal forms different acquisition times, and then shape by different hardware acquisition components
It is operated at the response of different delay, to form protection in timing.
Preferably, protection operation can also be executed by the chip of different processing capacities, to be further formed timing
On protection.
Referring to fig. 2, this preferred embodiment can also be added the chip of muti-piece different disposal ability, and then form Multilevel Response
The protection scheme of time.In Fig. 2, two chips are used, for example, the first chip contains the using CPLD or fpga chip execution
The comparison of three-level protective threshold value, and corresponding protection operation is executed, it may also be performed simultaneously the ratio containing second level protection threshold value
Compared with the comparison with third level protection threshold value, and execute corresponding protection operation.
Second chip is used to be compared the step of protecting threshold value containing the first order using dsp chip execution, and is executed corresponding
Protection operation.
The current signal for the rectifier that second chip is acquired by the first chip or independent acquisition by current regulating circuit
Value, protect threshold value comparison with the first order of setting: if it is greater, then issuing the cut-off signals of IGCT after delay；Wherein, described
The first order is protected between 1.2 times to 2 times that threshold value is the rated current of the rectifier systems of IGCT composition.
Through the above steps, it can be achieved that forming different acquisition times not only by different hardware acquisition components, also
By the chip of different disposal ability, response speed, and then the response operation of different delay is formed, is protected to be formed in timing
Shield.
Referring to Fig. 3, the current transformer of the applicable various topological structures based on IGCT of scheme in above-described embodiment, including figure
H bridge type rectifier in 2, wherein UN is input ac voltage, and LN is phase modulation reactance.By IGCT T1, T2, T3 and T4 and it is anti-simultaneously
Fast recovery diode D1, D2, D3 and D4 of connection form H bridge, and Cd is Support Capacitor, is connect among DC bus.Every road acquisition
Current signal includes at least two branches；The value of the current signal of each branch is respectively used to subsequent comparison；One of branch
Road is the current value of input power side；Another branch is bus DC current values.That is, during every time with threshold value comparison,
It is that the current values of two branches is compared with threshold value respectively, as long as there is the comparison result of a branch to meet the requirements, into one
Step executes subsequent step.
In embodiment, current regulating circuit can be realized using multiple hardwares structure, such as shown in Fig. 5, mainly there is three
Part forms, and part 1 is to flow through sampling resistor after capacitor C4 filtering, and current signal is converted to voltage signal, part 2
It is the phase inverter being made of amplifier, of ac signal is converted into electrode signal；Third portion is clamp amplitude limiter circuit,
Preventing voltage signal is more than the permissible value of the first chip input.
Opto-coupler chip can use structure shown in Fig. 4, in Fig. 4, realize 3 branch using the identical opto-coupler chip in 3 tunnels
The acquisition on road, can be used two branches therein, another branch is spare.
This preferred embodiment also provides a kind of device of the overcurrent protection of H bridge rectifier based on IGCT, as shown in Fig. 2,
It include: the H bridge rectifier current signal multichannel opto-coupler chip and current regulating circuit for acquiring multiplex IGCT；For according to even
The current signal of the multichannel opto-coupler chip, current regulating circuit acquisition that connect, issues the first core of protection control signal
Piece；Current signal for being acquired according to the current regulating circuit of connection issues the second core of protection control signal
Piece；Wherein, the response time for the protection control signal that first chip, the second chip issue is different.First chip is CPLD
Chip or fpga chip；Second chip is dsp chip.
Above-mentioned method process is realized by above-mentioned device, certainly, above-mentioned device is a kind of form, can also be had
The structure of corresponding deformation or equivalent replacement.
The method and apparatus illustrated in embodiment each for the present invention, all within the spirits and principles of the present invention,
Any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of method of the overcurrent protection of IGCT rectifier, which is characterized in that receive the rectifier of multichannel different delayed time acquisition
Current signal；The knot being compared respectively according to each road current signal of acquisition with corresponding threshold value by CPLD/FPGA and DSP
Fruit forms multi-stage protection in timing；
Current protection is divided into three-level protective, passes through the rectification of multichannel electric current conditioning circuit acquisition simultaneously by CPLD/FPGA and DSP
The value of the current signal of device and the protection threshold value comparison of setting；
Threshold value is protected if it is greater than the first order, then issues the cut-off signals of IGCT after being delayed, first order protection threshold value is set as
1.2~2 times of IGCT rectifier rated current；
Threshold value is protected if it is greater than the second level, then issues the cut-off signals of IGCT immediately, second level protection threshold value is set as IGCT
2 times of rectifier rated current to IGCT maximum controllable current value；
The value of the current signal for the rectifier that third level protection is acquired by opto-coupler chip and the third level of setting protect threshold value ratio
Compared with；If it is greater, then receiving fault level energizing signal by the processing chip being arranged and issuing the open signal of IGCT；Its
In, the third level protects maximum controllable current value of the threshold value equal to or slightly less than IGCT.
2. a kind of method of the overcurrent protection of IGCT rectifier according to claim 1, which is characterized in that the multichannel
The current signal of the rectifier of different delayed time acquisition passes through the optocoupler core in current regulating circuit and short-circuit protection circuit plate respectively
Piece collects.
3. a kind of method of the overcurrent protection of IGCT rectifier according to claim 1, which is characterized in that every road acquisition
Current signal includes two branches；The value of the current signal of each branch is respectively used to subsequent compared with corresponding threshold value；Wherein
One branch is used to acquire the input current value of source side in IGCT rectifier；Another branch is for acquiring in IGCT rectifier
Bus DC current values.
4. a kind of method of the overcurrent protection of IGCT rectifier according to claim 1, which is characterized in that using at DSP
Manage the step of chip executes the comparison step containing first order protection threshold value and corresponding protection operation；
Comparison step containing third level protection threshold value is executed using CPLD or FPGA processing chip or is protected simultaneously containing the second level
Protect the comparison step of threshold value and third level protection threshold value, and the step of executing corresponding protection operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510829687.4A CN105244849B (en) | 2015-11-25 | 2015-11-25 | A kind of method and apparatus of the overcurrent protection of IGCT rectifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510829687.4A CN105244849B (en) | 2015-11-25 | 2015-11-25 | A kind of method and apparatus of the overcurrent protection of IGCT rectifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105244849A CN105244849A (en) | 2016-01-13 |
| CN105244849B true CN105244849B (en) | 2018-12-07 |
Family
ID=55042384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510829687.4A Expired - Fee Related CN105244849B (en) | 2015-11-25 | 2015-11-25 | A kind of method and apparatus of the overcurrent protection of IGCT rectifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105244849B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769156B (en) * | 2016-08-18 | 2020-07-07 | 中国电力科学研究院 | Method for realizing safe self-adaptive protection action of equipment |
| CN107272858A (en) * | 2017-05-26 | 2017-10-20 | 郑州云海信息技术有限公司 | A kind of server adaptive overcurrent protection circuit and adaptive approach |
| CN107515329B (en) * | 2017-08-30 | 2020-08-04 | 国电南瑞科技股份有限公司 | IGBT comprehensive over-current protection method and system based on digital filtering |
| CN114498548B (en) * | 2022-01-21 | 2023-10-31 | 科威尔技术股份有限公司 | Overcurrent protection method and device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6998735B2 (en) * | 2002-10-28 | 2006-02-14 | Eaton Corporation | Controlled rectifier bridge, control system, and method for controlling rectifier bridge by disabling gate control signals |
| CN202374167U (en) * | 2011-12-02 | 2012-08-08 | 宁波安信数控技术有限公司 | Driver with IGBT overcurrent protection function |
| CN102882187B (en) * | 2012-10-29 | 2014-12-03 | 金海新源电气江苏有限公司 | Photovoltaic inverter protection device and method based on CPLD (complex programmable logic device) |
| CN203086429U (en) * | 2012-11-28 | 2013-07-24 | 比亚迪股份有限公司 | Protection circuit of IGBT of electric vehicle |
| CN203386035U (en) * | 2013-07-31 | 2014-01-08 | 山西朗思科技有限公司 | Vehicle acquisition card |
| CN204347514U (en) * | 2014-12-22 | 2015-05-20 | 水利部南京水利水文自动化研究所 | A kind of water conservancy information intelligent telemetry terminal system based on multi-channel data acquisition |
| CN104600682B (en) * | 2015-02-05 | 2017-05-24 | 湖北工业大学 | Active power filter current protection circuit and method |
-
2015
- 2015-11-25 CN CN201510829687.4A patent/CN105244849B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN105244849A (en) | 2016-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105244849B (en) | A kind of method and apparatus of the overcurrent protection of IGCT rectifier | |
| CN104283441B (en) | A kind of dc source and the method that dc source is provided | |
| DE19600547A1 (en) | Inverter protection circuit for industrial electrical power mains network | |
| CN103022965A (en) | Monitoring circuit of 12V voltage in electric vehicle electric drive controller | |
| CN107465253B (en) | Spare power automatic switching action method automatically adapting to action of stability system | |
| EP3593434B1 (en) | Method and assembly for generating an activating signal for an hvdc breaker | |
| CN113964863A (en) | Series photovoltaic system capable of automatically achieving module level turn-off | |
| Li et al. | A DC fault handling method of the MMC-based DC system | |
| CN103487707B (en) | Vehicle-mounted three-phase alternating-current powered intelligent monitoring unit | |
| US10218170B2 (en) | Current-limiting device utilizing a superconductor for a current-limiting operation | |
| CN103427667A (en) | High-performance static substation medium-frequency power supply | |
| CN113589023B (en) | Rapid detection method and device for single-set alternating current measurement abnormality of redundant system | |
| CN114172129B (en) | Hybrid device solid-state circuit breaker capable of being opened and closed in two directions and started in soft mode and control method | |
| CN105305796A (en) | Frequency converter direct-current busbar overvoltage and under-voltage protection method and system | |
| CN109194214A (en) | A kind of three-level synchronous generator transient overvoltage suppression circuit and its implementation | |
| CN104682684A (en) | Converter and overcurrent and overvoltage protection method thereof | |
| CN113824089A (en) | IGBT fault protection method and device | |
| CN205231715U (en) | Overcurrent protect device of IGCT rectifier | |
| CN203416174U (en) | High-performance static power transformation intermediate frequency power supply | |
| CN208675104U (en) | A kind of multiple-channel output is under-voltage and short-circuit protection circuit | |
| CN207339247U (en) | A kind of multichannel MPPT photovoltaic DC-to-AC converters float pressure process circuit | |
| CN110912081A (en) | Motor overvoltage protection circuit and motor | |
| Fletcher et al. | Impact of converter interface type on the protection requirements for DC aircraft power systems | |
| WO2019048475A1 (en) | Floating voltage processing circuit for multipath mppt photovoltaic converter | |
| CN205453284U (en) | Take voltage clamp controller of seamless handover function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181207 Termination date: 20201125 |