CN202333759U - Intelligent residual current protector for power generator - Google Patents
Intelligent residual current protector for power generator Download PDFInfo
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- CN202333759U CN202333759U CN2011205203589U CN201120520358U CN202333759U CN 202333759 U CN202333759 U CN 202333759U CN 2011205203589 U CN2011205203589 U CN 2011205203589U CN 201120520358 U CN201120520358 U CN 201120520358U CN 202333759 U CN202333759 U CN 202333759U
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Abstract
The utility model discloses an intelligent residual current protector for a power generator, which comprises a digital signal processor, an A/D (analog to digital) converter, a power supply, a display, a voltage signal collector, an actuator and a current signal collector, wherein output ends of the voltage signal collector and the current signal collector are respectively connected with an input end of the A/D converter; an output end of the A/D converter is connected with an input end of the digital signal processor; an output end of the digital signal processor is connected with the actuator; the input end of the digital signal processor is also connected with the power supply and the display; the current signal collector comprises four current transformers and four current sensors; output ends of the current transformers are connected with input ends of the current sensors. By adopting the intelligent residual current protector of the power generator provided by the utility model, the intelligent residual current protector of the power generator not only has the under-voltage, outer short circuit, overload protection functions and the like of the traditional protector, but also has the function of multi-level electricity leakage protection, meanwhile, the intelligent residual current protector of the power generator also has the advantages of high flexibility, high applicability, high reliability and the like.
Description
Technical field
The utility model relates to generator, relates in particular to generator intelligent residual current protector.
Background technology
Diesel generating set at home and abroad has a wide range of applications in all trades and professions, and generator is the core of diesel generating set.Generator input mechanical energy is exported electric energy again through internal conversion, and its function has determined that generator must have complete electrical protection systems.The complete electrical protection systems of generator has overload protection at least, under-voltage protection, overvoltage protection, underfrequency protection, overfrequency protection, defencive functions such as short-circuit protection.
At present various protectors (circuit breaker) are arranged in the field extensive use of generator electic protection; For example: all-purpose air breaker, breaker of plastic casing, residual current circuit breaker etc. are arranged; These circuit breakers all have basic short circuit, and are under-voltage, functions such as overload protection.These protectors all are universal electromagnet-type protectors, can be to various loads and power supplys, and electrical network is protected.
But more than traditional protector have following problem: (1) specificity is poor; Can not protect generator; The various circuit breakers of using at present all are universal electromagnetic type circuit breakers, and the characteristic of the characteristic of generator and numerous linearity, non-linear load is distinct, though these circuit breakers can be protected generator when breaking down; But generator is caused damage, make the generator lost of life.(2) very flexible, operate time of protection can't be adjusted with the protection parameter, can't satisfy various countries' every profession and trade differentiation protection demand.(3) poor anti jamming capability, this type of protector is the electromagnetic type protector, influenced greatly by magnetic field environment, and misoperation takes place easily.(4) automaticity is low, can't implement three distant functions and automatic operation, and each parameter of generator operation can't be implemented three distant functions.(5) interactive capability is poor, when breaking down, and the meeting execute protection, but can't show why plant protection former thereby that carry out, can not help the technical staff to search failure problems.(6) defencive function is not comprehensive.
Generator is very limited as far as the load capacity, particularly as primary power cource generator, usually the margin of power is all very little; And the environment that is in as the generator of primary power cource is relatively more abominable usually---high temperature, humidity, dust; Greasy dirt, outside electrical power trans mission/distribution system of the generator in this environment and load are very easy to produce insulator damage, cause grid power leakage; Safety to the person and generator causes very big threat; For personal safety, generator also should possess earth leakage protective except that possessing complete grounding system.The earth leakage protective device of the generator above the existing market generally all has only one-level earth leakage protective; And all be electromagnetic type; Receive electromagnetic interference bigger, cause misoperation easily, and electric leakage operate time and electrical leakage quantity are fixed; Can't adjust, can't satisfy the earth leakage protective of generator under various environment.
Summary of the invention
In order to overcome the deficiency of prior art, the purpose of the utility model is to provide a kind of can carry out multistage earth leakage protective generator intelligent residual current protector.
The utility model generator intelligent residual current protector; It comprises digital signal processor; A/D converter, power supply, display, voltage signal acquisition device, actuator and current signal collector, wherein; The output of voltage signal acquisition device and current signal collector is connected with the input of A/D converter respectively; The output of A/D converter is connected with the input of digital signal processor, and the output of digital signal processor is connected with actuator, and the input of digital signal processor also is connected with power supply and display; Said current signal collector comprises four current transformers and four high precision electric current transducers, and the output of current transformer connects the input of current sensor.
Said digital signal processor surface is provided with the guidance panel that is used to be provided with performance parameter.
Be provided with the memory and the comparator of electrical connection in the said digital signal processor, store memory contains preset performance parameter.
Adopt the generator intelligent residual current protector of the utility model, it is under-voltage not only to have a traditional protection device, external short circuit, and functions such as overload protection also have multistage earth leakage protective function.Simultaneously, also have the following advantages:
(1) high flexibility: the overload current value of overload protection can be adjusted arbitrarily, and the magnitude of voltage of under voltage protection can be adjusted, and the protection short-circuit current value of external short circuit can be adjusted.
(2) cutting out property of height: above-mentioned each item defencive function can be according to user's demand combination in any and cutting.
(3) high applicability: be suitable for electric current from 1A-500A, be suitable for voltage from 220V-10KV, frequency 50HZ-60HZ.
(4) high reliability: measuring circuit directly adopts from outside non-cpntact measurement, does not destroy the construction of cable.
(6) high scalability:, be convenient to the function expansion because of the protector digital signal processor inside is a standard module.(7) standardization: the protector of the utility model not only satisfies user's individual demand, and meets GB 19517-2009: national electric equipment technical specification of security standard, also satisfy international electrical standard IEC simultaneously.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation:
Figure is the structural representation of the utility model generator intelligent residual current protector.
Embodiment
As shown in Figure 1; The utility model comprises digital signal processor 1; A/D converter 2, power supply 3, display 4, voltage signal acquisition device 5, actuator 6 and current signal collector 7, wherein; The output of voltage signal acquisition device 5 and current signal collector 6 is connected with the input of A/D converter 2 respectively; The output of A/D converter 2 is connected with the input of digital signal processor 1, and the output of digital signal processor 1 is connected with actuator 6, and the input of digital signal processor 1 also is connected with power supply 3 and display 4; Said current signal collector 7 comprises four current transformers 71 and four high precision electric current transducers 72, and the output of current transformer 71 connects the input of current sensor 72.
Said digital signal processor 1 surface is provided with the guidance panel 11 that is used to be provided with performance parameter.
In the utility model, utilize the parameters such as current value, delay time, earth leakage protective current value of under voltage value, the external short circuit protection of overload current value, the under voltage protection of the guidance panel 11 input generators overload of digital signal processor 1.
Be provided with the memory 12 and comparator 13 of electrical connection in the said digital signal processor 1, memory 12 internal memories contain preset performance parameter.
During multistage earth leakage protective, three live wires and the current signal of a zero line on the generator three-phase circuits gathered by four current transformer 71 branches of current signal collector 7, and four current transformers 71 send to four current sensors 72 with the live wire current signal of gathering; Four current signals that current sensor 72 will receive convert four voltage signals into; And the voltage signal of conversion sent to A/D converter 2, and A/D converter 2 sends to digital signal processor 1 after converting the voltage signal that receives into digital signal, and the comparator 13 in the digital signal processor 1 compares the digital signal that receives and the earth leakage protective current value of setting; If do not surpass set point; Then the generator operate as normal if surpass set point, reads the delay time value that the user sets in the memory 12; After carrying out corresponding delay; Actuator 6 moves, and sends signal to the speed regulator of the shunt release of external relay or circuit breaker or AVR of generator (automatic voltage regulator) or diesel engine, the operation of generation outage machine or outside output electric energy; The protection generator, thus multistage creepage protection function accomplished.
During multistage overload protection, the current signal of three live wires on the generator three-phase circuits is gathered by current signal collector 7 three current transformer 71 branches wherein, and three current transformers 71 send to current sensor 72 with the live wire current signal of gathering; Current sensor 72 converts the current signal that receives into voltage signal; And the voltage signal of conversion sent to A/D converter 2, and A/D converter 2 sends to digital signal processor 1 after converting the voltage signal that receives into digital signal, and the comparator 13 in the digital signal processor 1 compares the overload current value that the generator of the digital signal that receives and setting transships; If do not surpass set point; Then the generator operate as normal if surpass set point, reads the delay time value that the user sets; After carrying out corresponding delay; Actuator 13 moves, and sends signal to the speed regulator of the shunt release of external relay or circuit breaker or AVR of generator (automatic voltage regulator) or diesel engine, the operation of generation outage machine or outside output electric energy; The protection generator, thus multistage overload protection function accomplished.
Be generally 3 times of running current set point because of the set point of the electric current of external short circuit protection; So when the digital signal of three live wire electric currents that detect surpasses set point, and when also surpassing the current setting value of external short circuit protection, digital signal processor 1 sends control signal to actuator 6; Actuator 6 moves; The external relay snap action that is connected with actuator 6 is to external output signal, execute protection, thus accomplish the external short circuit defencive function.
During under voltage protection; Voltage signal acquisition device 5 is gathered the voltage signal in the three-phase circuit respectively; And the voltage signal of gathering sent to A/D converter 2, and A/D converter 2 converts the voltage signal that receives digital signal into and sends to digital signal processor 1, and the digital signal that the comparator 13 in the digital signal processor 1 will receive voltage compares than the under voltage value of the under voltage protection of setting; When the under voltage value that detects during, continue to extract less than user's set point; When under voltage value that the under voltage value that detects is set greater than the user, digital signal processor 1 sends signals for actuator 6, and actuator 6 moves, and system gets into the under-voltage protection program.
Claims (3)
1. generator intelligent residual current protector; It is characterized in that: it comprises digital signal processor; A/D converter, power supply, display, voltage signal acquisition device, actuator and current signal collector, wherein; The output of voltage signal acquisition device and current signal collector is connected with the input of A/D converter respectively; The output of A/D converter is connected with the input of digital signal processor, and the output of digital signal processor is connected with actuator, and the input of digital signal processor also is connected with power supply and display; Said current signal collector comprises four current transformers and four current sensors, and the output of current transformer connects the input of current sensor.
2. generator intelligent residual current protector according to claim 1 is characterized in that: said digital signal processor surface is provided with the guidance panel that is used to be provided with performance parameter.
3. generator intelligent residual current protector according to claim 1 is characterized in that: be provided with the memory and the comparator of electrical connection in the said digital signal processor, store memory contains preset performance parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205203589U CN202333759U (en) | 2011-12-12 | 2011-12-12 | Intelligent residual current protector for power generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205203589U CN202333759U (en) | 2011-12-12 | 2011-12-12 | Intelligent residual current protector for power generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202333759U true CN202333759U (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205203589U Expired - Fee Related CN202333759U (en) | 2011-12-12 | 2011-12-12 | Intelligent residual current protector for power generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202333759U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199294A (en) * | 2016-08-31 | 2016-12-07 | 中铁工程设计咨询集团有限公司 | A kind of arc light protecting device |
-
2011
- 2011-12-12 CN CN2011205203589U patent/CN202333759U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199294A (en) * | 2016-08-31 | 2016-12-07 | 中铁工程设计咨询集团有限公司 | A kind of arc light protecting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Fei Inventor before: Huang Mengcai Inventor before: Dong Baofa |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: HUANG MENGCAI DONG BAOFA TO: LIU FEI |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20171212 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |