CN102324730B - The guard method of generator short circuit - Google Patents
The guard method of generator short circuit Download PDFInfo
- Publication number
- CN102324730B CN102324730B CN201110278905.1A CN201110278905A CN102324730B CN 102324730 B CN102324730 B CN 102324730B CN 201110278905 A CN201110278905 A CN 201110278905A CN 102324730 B CN102324730 B CN 102324730B
- Authority
- CN
- China
- Prior art keywords
- short
- electromotor
- omnipotent breaker
- short circuit
- generator
- 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
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000003111 delayed effect Effects 0.000 claims description 9
- 230000002459 sustained effect Effects 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000001771 impaired effect Effects 0.000 abstract description 3
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
The guard method of the generator short circuit of the present invention, the short-circuit protection of electromotor, the short time delay or the instantaneous trip device that usually rely on electromotor omnipotent breaker are carried out；Short circuit short time-delay including electromotor is protected and the instantaneous short-circuit protection of electromotor; it can guarantee that the safety of electromotor; relative to existing technologies; it can effectively protect electromotor; do not have the phenomenon that electromotor is impaired because of short circuit and damages; the service life of electromotor can be extended, decrease unnecessary maintenance cost.
Description
Technical field
The present invention relates to the guard method of a kind of generator short circuit.
Background technology
Electromotor is indispensable important energy source equipment in the development of the national economy and people's lives.Electromotor once breaks down, and will produce serious consequence.Various protection electrical equipment must be installed at the leading-out terminal of electromotor for this to be protected.Residing for electromotor, place is the most, such as firepower, Hydraulic power station, large ship, airborne vehicle and hitching machinery power supply (such as some electric railway, the house generator of subway) etc..When generating problem primarily now is to be susceptible to short circuit, during short circuit, can seriously burn out electromotor, increase maintenance cost.
Summary of the invention
The technical problem to be solved in the present invention is to provide one can effectively protect electromotor, will not increase the guard method of the generator short circuit of maintenance cost.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that the short-circuit protection of electromotor, and the short time delay or the instantaneous trip device that usually rely on electromotor omnipotent breaker are carried out；Wherein, 1). the short circuit short time-delay of electromotor protects the short delayed release of 1 electromotor omnipotent breaker to be necessarily placed at the load-side of main distributing board bus, when be short-circuited accident time, for selective protection, it is combined with a necessary time limit: lower orientation powers and uses protection device because of short circuit during disjunction action, the short delayed release of omnipotent breaker should be failure to actuate, simultaneously, when bus is short-circuited accident, in its short-circuit current value and short circuit duration, electromotor omnipotent breaker allows for bearing, the time of bearing is its short delay time, the setting valve determining short time delay with this and scope movement time；2). the instantaneous short-circuit protection of electromotor: the instantaneous trip of electromotor omnipotent breaker refers to the omnipotent breaker being configured in the electromotor loop of paired running, load-side at it be short-circuited accident time snap action, now flow through ACB except it protection electromotor short circuit current in addition to, also have with other electric power generator groups of this parallel operation of generator and be connected with bus motor cluster inflow short dot electric current, moving setting valve accordingly the wink of electromotor omnipotent breaker should be: 1) bus or other load-side are short-circuited accident and flow into the short circuit current of electromotor omnipotent breaker, the wink of omnipotent breaker is moved device and should be failure to actuate；2), when generator side short circuit accident occurs, other electric power generator groups, motor cluster flow into necessary action during short dot；3) move the setting valve of electrical apparatus release wink should adjust the scope below the short-time current value of omnipotent breaker.
Further, the short time delay of electromotor omnipotent breaker when determining its setting valve must be: 1). less than the minimum sustained short circuit current that electromotor allows；2). than the short time delay of lower orientation protection device or instantaneous greatly.
Further, electromotor minimum allows sustained short circuit current can be the 300% of the rated current of generator, so the short delayed release setting current of electromotor omnipotent breaker is typically adjusted between 250%～300% of the rated current of generator.
The guard method of the generator short circuit of the present invention, can guarantee that the safety of electromotor, relative to existing technologies; it can effectively protect electromotor; do not have the phenomenon that electromotor is impaired because of short circuit and damages, the service life of electromotor can be extended, decrease unnecessary maintenance cost.
Detailed description of the invention
In the present embodiment, the short-circuit protection of electromotor, the short time delay or the instantaneous trip device that usually rely on electromotor omnipotent breaker are carried out；Wherein, 1). the short circuit short time-delay protection of electromotor: the short delayed release of electromotor omnipotent breaker is necessarily placed at the load-side of main distributing board bus, when be short-circuited accident time, for selective protection, it is combined with a necessary time limit: lower orientation powers and uses protection device because of short circuit during disjunction action, the short delayed release of omnipotent breaker should be failure to actuate, simultaneously, when bus is short-circuited accident, in its short-circuit current value and short circuit duration, electromotor omnipotent breaker allows for bearing, the time of bearing is its short delay time, the setting valve determining short time delay with this and scope movement time；The short time delay of electromotor omnipotent breaker when determining its setting valve must be: 1). less than the minimum sustained short circuit current that electromotor allows；2). than the short time delay of lower orientation protection device or instantaneous greatly.Electromotor minimum allows sustained short circuit current can be the 300% of the rated current of generator, so the short delayed release setting current of electromotor omnipotent breaker is typically adjusted between 250%～300% of the rated current of generator.
2). the instantaneous short-circuit protection of electromotor: the instantaneous trip of electromotor omnipotent breaker refers to the omnipotent breaker being configured in the electromotor loop of paired running, load-side at it be short-circuited accident time snap action, now flow through ACB except it protection electromotor short circuit current in addition to, also have with other electric power generator groups of this parallel operation of generator and be connected with bus motor cluster inflow short dot electric current, moving setting valve accordingly the wink of electromotor omnipotent breaker should be: 1) bus or other load-side are short-circuited accident and flow into the short circuit current of electromotor omnipotent breaker, the wink of omnipotent breaker is moved device and should be failure to actuate；2), when generator side short circuit accident occurs, other electric power generator groups, motor cluster flow into necessary action during short dot；3) move the setting valve of electrical apparatus release wink should adjust the scope below the short-time current value of omnipotent breaker.
The guard method of the generator short circuit of the present invention, can guarantee that the safety of electromotor, relative to existing technologies; it can effectively protect electromotor; do not have the phenomenon that electromotor is impaired because of short circuit and damages, the service life of electromotor can be extended, decrease unnecessary maintenance cost.
Below the present invention is described in detail, the above, only the preferred embodiments of the invention, when not limiting the scope of the present invention, the most all made impartial change according to the application scope and modified, all should still be belonged in covering scope of the present invention.
Claims (3)
1. the guard method of a generator short circuit, it is characterised in that: the short-circuit protection of electromotor, rely on the short time delay of electromotor omnipotent breaker or instantaneous trip device to carry out；Wherein, 1). the short circuit short time-delay protection of electromotor: the short delayed release of electromotor omnipotent breaker is necessarily placed at the load-side of main distributing board bus, when be short-circuited accident time, for selective protection, it is combined with a necessary time limit: lower orientation powers and uses protection device because of short circuit during disjunction action, the short delayed release of omnipotent breaker should be failure to actuate, simultaneously, when bus is short-circuited accident, in its short-circuit current value and short circuit duration, electromotor omnipotent breaker allows for bearing, the time of bearing is its short delay time, the setting valve determining short time delay with this and scope movement time；2). the instantaneous short-circuit protection of electromotor: the instantaneous trip of electromotor omnipotent breaker refers to the omnipotent breaker being configured in the electromotor loop of paired running, load-side at it be short-circuited accident time snap action, now flow through ACB except it protection electromotor short circuit current in addition to, also have with other electric power generator groups of this parallel operation of generator and be connected with bus motor cluster inflow short dot electric current, moving setting valve accordingly the wink of electromotor omnipotent breaker should be: 1) bus or other load-side are short-circuited accident and flow into the short circuit current of electromotor omnipotent breaker, the wink of omnipotent breaker is moved device and should be failure to actuate；2), when generator side short circuit accident occurs, other electric power generator groups, motor cluster flow into necessary action during short dot；3) move the setting valve of electrical apparatus release wink should adjust the scope below the short-time current value of omnipotent breaker.
The guard method of generator short circuit the most according to claim 1, it is characterised in that: the short time delay of electromotor omnipotent breaker when determining its setting valve must be: 1). less than the minimum sustained short circuit current that electromotor allows；2). than the short time delay of lower orientation protection device or instantaneous greatly.
The guard method of generator short circuit the most according to claim 1; it is characterized in that: electromotor minimum allows sustained short circuit current to be the 300% of the rated current of generator, so the short delayed release setting current of electromotor omnipotent breaker is adjusted between 250%～300% of the rated current of generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110278905.1A CN102324730B (en) | 2011-09-20 | 2011-09-20 | The guard method of generator short circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110278905.1A CN102324730B (en) | 2011-09-20 | 2011-09-20 | The guard method of generator short circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102324730A CN102324730A (en) | 2012-01-18 |
| CN102324730B true CN102324730B (en) | 2016-08-03 |
Family
ID=45452417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110278905.1A Expired - Fee Related CN102324730B (en) | 2011-09-20 | 2011-09-20 | The guard method of generator short circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102324730B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3285079B1 (en) * | 2016-08-16 | 2021-10-20 | Siemens Aktiengesellschaft | Method for protecting a generator or power plant block and protective device for carrying out such a method |
| CN106684813B (en) * | 2016-12-12 | 2019-04-09 | 浙江宇视科技有限公司 | The method and device of disk protection |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3976917A (en) * | 1974-03-29 | 1976-08-24 | Kraftwerk Union Aktiengesellschaft | Protection device for a power plant to prevent overloading in the event of short circuits |
| CN101651329A (en) * | 2008-12-03 | 2010-02-17 | 南京南瑞继保电气有限公司 | Judgment method of line breakage of special TV for inter-turn protection of generator |
| CN101741062A (en) * | 2009-12-30 | 2010-06-16 | 深圳南瑞科技有限公司 | Inter-turn protection method for power generator |
| CN101741142A (en) * | 2009-12-03 | 2010-06-16 | 江苏科技大学 | Modular intelligent controller and controlling method of low-voltage circuit breaker dedicated to wind power generation |
-
2011
- 2011-09-20 CN CN201110278905.1A patent/CN102324730B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3976917A (en) * | 1974-03-29 | 1976-08-24 | Kraftwerk Union Aktiengesellschaft | Protection device for a power plant to prevent overloading in the event of short circuits |
| CN101651329A (en) * | 2008-12-03 | 2010-02-17 | 南京南瑞继保电气有限公司 | Judgment method of line breakage of special TV for inter-turn protection of generator |
| CN101741142A (en) * | 2009-12-03 | 2010-06-16 | 江苏科技大学 | Modular intelligent controller and controlling method of low-voltage circuit breaker dedicated to wind power generation |
| CN101741062A (en) * | 2009-12-30 | 2010-06-16 | 深圳南瑞科技有限公司 | Inter-turn protection method for power generator |
Non-Patent Citations (2)
| Title |
|---|
| CW3万能式断路器的智能控制器的选型与使用;管瑞良等;《电气技术》;20100531;第19-22页 * |
| THW1万能式断路器在选择性保护中的应用;王兴利等;《低压电器》;20101231;第61-64页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102324730A (en) | 2012-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205283088U (en) | A direct current ground protecting device for magnetic levitation track traffic | |
| CN106992496B (en) | Earth leakage protecting method for Feeding System of Urban Rail Transit | |
| CN108819801B (en) | Steel rail potential suppression system and method | |
| CN105514926A (en) | Method for recovering power supply after stripping started by direct-current ground protection | |
| CN104283263A (en) | Direct-current charging pile main circuit double-control power supply system and control method thereof | |
| CN102324730B (en) | The guard method of generator short circuit | |
| CN202917938U (en) | Voltage shock preventing system | |
| CN205736980U (en) | A kind of high-voltage battery charging system safety protection control circuit | |
| CN204441216U (en) | A kind of overload-alarm circuit breaker | |
| CN203299612U (en) | Gas excess pressure generator set control unit module | |
| CN202864606U (en) | Elevator electric system safety return circuit | |
| CN205595755U (en) | High -voltage circuit relaying protection system | |
| CN205303981U (en) | A intelligent power distribution cabinet equipment for electric power system | |
| CN204835513U (en) | Voltage type arc light protection device | |
| CN105762758A (en) | Direct current side protection method of regeneration energy recovery system | |
| CN202721433U (en) | Leakage protection and power supply recovery apparatus | |
| CN207398819U (en) | A kind of high-voltage alternating current generator outlet breaker device based on RL | |
| CN203014360U (en) | On-line circuit fault monitoring and protecting device | |
| CN202405755U (en) | Improved control structure coping with voltage shock of motor | |
| CN201556792U (en) | Comprehensive safe fire-resistant socket | |
| CN206878447U (en) | A kind of high-voltage alternating current generator outlet breaker device based on RL | |
| CN202997534U (en) | Intelligent device and system for removing line faults of overhead contact line system | |
| CN205791495U (en) | The protection of controller switching equipment intelligent switch-on controls device | |
| CN202872352U (en) | Converter valve locking device based on flexible direct current transmission system | |
| CN103066577B (en) | A kind of excision of contact line circuit intelligent fault equipment, system and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 528437 B building, No. 53 West Jiangling Road, torch hi tech Development Zone, Guangdong, Zhongshan Applicant after: GUANGDONG TECCO ELECTRIC Co.,Ltd. Address before: 528437 B building, No. 53 West Jiangling Road, torch hi tech Development Zone, Guangdong, Zhongshan Applicant before: Guangdong Tianfu Electrical Group Co.,Ltd. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: GUANGDONG TIANFU ELECTRIC GROUP CO., LTD. TO: GUANGDONG TECCO ELECTRIC CO., LTD. |
|
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20180920 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |