CN202094617U - Arc light protection system - Google Patents
Arc light protection system Download PDFInfo
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- CN202094617U CN202094617U CN201120245000XU CN201120245000U CN202094617U CN 202094617 U CN202094617 U CN 202094617U CN 201120245000X U CN201120245000X U CN 201120245000XU CN 201120245000 U CN201120245000 U CN 201120245000U CN 202094617 U CN202094617 U CN 202094617U
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- arc light
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Abstract
The utility model discloses an arc light protection system which belongs to the technical field of power distribution safety and is mainly used for solving the problems of slow failure-clearing speed caused by higher probability of the failure of middle-low voltage buses and the like in the prior art. The arc light protection system comprises a main control unit, an arc light sensor and a main mutual inductor, wherein the main control unit comprises a main CPU (Central Processing Unit) as well as a power supply, a main voltage and current collection device, a tripping device, a display and input device and a main arc light collection device, which are respectively connected with the main CPU; the main arc light sensor is connected with the main arc light collection device; and the main mutual inductor is connected with the main voltage and current collection device. In the utility model, a double-criterion principle of arc light detection and overcurrent is adopted, the principle is simple and the action is rapid and reliable, so that the failure can be cleared rapidly and the electric equipment is prevented from being damaged by disadvantageous arc light protection.
Description
Technical field
The utility model relates to distribution safe practice field, specifically, relates to a kind of arclight protection system.
Background technology
The bus of present domestic 35kV and following electric pressure generally all is not equiped with the bus protection system.Yet the outlet on the middle voltage bus bar is many, and operation is frequent, and the close together of three-phase conductor wire spacing and the earth is easy to be subjected to the destruction of toy; Simultaneously, the quality of mesolow equipment also can not show a candle to high-tension apparatus, and service conditions is also relatively more abominable, not only mechanical wear is serious, and its insulating barrier is easier to be aging, moreover, manual operation also can produce mistake, and therefore, the probability that middle voltage bus bar breaks down is high more a lot of than high pressure, superhigh pressure bus.
For a long time, people are to excise fault on the bus by the backup protection that has bigger time-delay to the protection of middle voltage bus bar mostly, but this mode tends to cause the fault extension, thereby cause enormous economic loss.Specifically, the protection scheme of existing several middle voltage bus bars is as follows:
A. transformer reserve overcurrent protection scheme
This scheme is the present protection scheme of the domestic middle voltage bus bar that is most widely used, and this scheme has been considered cooperating of busbar sectional izing switch and feeder line, and it protects trip time to be generally 1.0-1.4 second, and is that have even longer, reaches more than 2.0 seconds.The execution speed of this protection action obviously is the requirement that can't satisfy quick excision middle voltage bus bar fault far away.
B. feeder line overcurrent protection locking transformer overcurrent protection scheme
This scheme is the extensive use of microcomputer overcurrent protection in recent years on middle pressure feeder line.The external feeder line overcurrent element locking transformer overcurrent protection that utilizes that proposes is widely used overcurrent blocking protection scheme.This scheme is compared its responsiveness with transformer reserve overcurrent protection scheme and is improved, and the typical action time is 300-400ms, but still does not reach the requirement of 100ms with interior excision fault.
C. adopt the high impedance bus protection scheme of circulation principle
External some big event once adopted the middle voltage bus bar protection scheme of this special-purpose current differential; its typical operate time of protection is 35-60ms; but after adding the opening time of circuit breaker; cause the time of This move to increase to some extent; and this scheme is very high to the requirement of CT; wiring is also very complicated, thereby has increased in the installation difficulty that has on the 6-35kV bus of a lot of outlets, and therefore this scheme is very uneconomical.In addition, because the scope of this scheme protection is subjected to the restriction of CT installation site, can not protect fault such as cable joint place, cable vault to take place frequently ground conscientiously.Therefore also be not suitable for the application of middle voltage bus bar protection.
From practical situations; above protection scheme all is difficult to satisfy the requirement of excising busbar fault fast or reaching the protection coverage; therefore press for a kind of novel middle voltage bus bar rapid protection system that can excise fault fast, reduce the loss that causes because of busbar fault widely.
The utility model content
The purpose of this utility model is to provide a kind of arclight protection system, overcomes in the prior art because middle voltage bus bar breaks down that probability is higher, the excision fault causes fault progression, expansion slowly, and then causes defective such as tremendous economic loss.
To achieve these goals, the technical solution adopted in the utility model is as follows:
A kind of arclight protection system; comprise main control unit, minor arc optical sensor and main instrument transformer; wherein; main control unit comprises host CPU; and the power supply that is connected with this host CPU respectively, principal voltage current collecting device, tripgear, demonstration and input unit and minor arc light collection device; described minor arc optical sensor is connected with minor arc light collection device, and main instrument transformer then is connected with the principal voltage current collecting device.By main instrument transformer and minor arc optical sensor being installed on corresponding control point, gather corresponding signal, be in by host CPU then and control trip operation, thereby realization is to effective protection of middle voltage bus bar.
Further, in order to increase the arc light control point, improve the system protection dynamics, the utility model also comprises the arc light expanding element that is connected with host CPU by arc light expanding element interface, and the inferior arc photosensor that is connected with this arc light expanding element.Specifically, described arc light expanding element comprises the inferior CPU that is connected with arc light expanding element interface, and the inferior arc light harvester that is connected with this time CPU, and described time arc photosensor is connected with time arc light harvester.
Again further, in order to increase the control point of electric current and voltage in the circuit, the utility model also comprises the electric current and voltage expanding element that is connected with host CPU by electric current and voltage expanding element interface, and be connected with this electric current and voltage expanding element from instrument transformer.Specifically, described electric current and voltage expanding element comprise be connected with electric current and voltage expanding element interface from CPU, and with this from CPU be connected from the electric current and voltage harvester, described from instrument transformer be connected from the electric current and voltage harvester.
Further, for the protection of further raising system, the quantity of described arc light expanding element is at least one, and the quantity of the inferior arc light harvester that is connected with each time CPU is no more than 16; The quantity of described electric current and voltage expanding element is at least one, and is no more than 8 with each quantity from the electric current and voltage harvester that is connected from CPU.
Exactly, described main instrument transformer, be at least a kind of the voltage transformer summation current transformer respectively from instrument transformer.
Compared with prior art, the beneficial effects of the utility model are:
1. the utility model detects arc light and electric current simultaneously, and both are judged, not only principle is simple, and the action execution speed is fast, effective;
2. the utility model can carry out unified management to the information of arc fault and current waveform record, and accurate localization can be carried out in the fault orientation, thereby provides reliable foundation for fixing a breakdown, and has improved the efficient of system maintenance;
3. the utility model not only satisfies the requirement of excision fault fast total operate time, and is far smaller than the various middle voltage bus bar protection schemes of prior art, can excise fault fast, reaches the purpose of fault restriction arc duration;
4. in the utility model, if more than the arclight transducer perseveration 7s, then host CPU will control and show with input unit and report to the police, and the disconnection arc photosensor; In case stray light heading line off, arc photosensor just recover normal function, fault alarm also resets at once;
5. the utility model has reduced the damage of arc light switching devices effectively by the mode of tripping operation, has further avoided transformer to damage because of suffering short-circuit current rush.
Description of drawings
Fig. 1 is the system block diagram of the utility model-embodiment 1;
Fig. 2 is the system block diagram of the utility model-embodiment 2.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.Execution mode of the present utility model includes but not limited to the following example.
Embodiment 1
As shown in Figure 1, a kind of arclight protection system is made up of main control unit, minor arc optical sensor and main instrument transformer.Present embodiment is monitored the arc light of bus control point in real time by the minor arc optical sensor; and main instrument transformer is monitored the voltage of bus control point in real time or/and electric current; and the control tripgear is carried out trip protection when fault takes place; thereby before electric arc is lighted with failure removal; fault is eliminated fast; power supply recovers rapidly, to reduce loss.Present embodiment is the most basic arclight protection system, is mainly used in control point less small-sized transformer station, power plant or enterprise.
In the present embodiment, main control unit comprises host CPU, and the power supply that is connected with this host CPU respectively, principal voltage current collecting device, tripgear, demonstration and input unit, minor arc light collection device, the quantity of described minor arc optical sensor is at least one, and each minor arc optical sensor all directly is connected with minor arc light collection device, and the quantity of main instrument transformer also is at least one, and each main instrument transformer all directly is connected with the principal voltage current collecting device.Wherein, the principal voltage current collecting device is made up of the voltage/current converter and the dual operational amplifier of mutual series connection, and the signal input part of this voltage/current converter is connected with main instrument transformer, and the signal output part of dual operational amplifier then is connected with host CPU; Minor arc light collection device comprises the integrating circuit and the linear optical coupling of mutual series connection, and this integrating circuit is made up of the resistance and the electric capacity of mutual series connection, and its signal input part is connected with the minor arc optical sensor, and the signal output part of linear optical coupling then is connected with host CPU; Main instrument transformer is at least a kind of in the voltage transformer summation current transformer.
During installation, minor arc optical sensor and main instrument transformer all have unique ID, and the minor arc optical sensor is over against monitored point, and main instrument transformer then is installed on the bus of respective point.The function of above-mentioned each components and parts is as follows respectively: power supply provides 12V stable DC voltage for whole system; The voltage of main instrument transformer acquisition monitoring point, current signal, principal voltage current collecting device are responsible for obtaining the signal that main instrument transformer is gathered, and it is carried out conversion and amplification; The arc optical signal of minor arc optical sensor acquisition monitoring point, minor arc light collection device are responsible for the level conversion of the signal of minor arc optical sensor collection is become the level of host CPU needs, so that host CPU is handled; Host CPU is responsible for handling the signal of principal voltage current collecting device and the transmission of minor arc light collection device, and sends control signal corresponding according to result to tripgear; Show input and the demonstration of being responsible for data with input unit on the one hand, be responsible for showing the operating state of each control point on the other hand, reach the purpose of warning.
The course of work of present embodiment is as follows:
At first, the principal voltage current collecting device is provided with initial value, gives relevant logical relation tripgear; Then, the arc optical signal of the real-time acquisition monitoring point of minor arc optical sensor, and the arc light intensity-conversion become 4～20mA current signal, send it to then in the minor arc light collection device, minor arc light collection device becomes the level conversion of this signal the level signal of suitable host CPU and is sent to host CPU, meanwhile, the principal voltage current collecting device then to the bus voltage signal of voltage transformer collection or/and the line current signal of current transformer collection carries out preliminary treatment, as voltage, current transformation, signal amplifications etc. transfer to it host CPU then; After host CPU receives the signal of principal voltage current collecting device and the transmission of minor arc light collection device, judge whether to satisfy trip condition, if satisfy, then tripgear is sent trip signal according to the logical relation of setting, the switchgear action that control is corresponding, on demonstration and input unit, show in real time simultaneously, thereby realize the arc fault point is positioned; Otherwise, then do not trip, but the update displayed content.
Embodiment 2
As shown in Figure 2, present embodiment is mainly used in the more large-scale substation in control point, power plant.Because large-scale substation, power plant scale are big, its bus quantity is many, needs that therefore more arc photosensor is installed and instrument transformer is monitored, to guarantee the general protection to object of protection.And main control unit is subjected to the interface restricted number; its direct-connected instrument transformer quantity is no more than 6 the tunnel, arc photosensor quantity is no more than 10; therefore; satisfy the protection demand of objects such as large-scale substation, power plant; must expand by docking port, to realize the access of more arc photosensor, instrument transformer.
Present embodiment is compared with embodiment 1, its design principle is identical, the main control unit structure is identical, difference is, main control unit has carried out the interface expansion, concrete scheme is as follows: arc light expanding element interface and electric current and voltage expanding element interface have been installed on the host CPU, have been connected with the arc light expanding element on the arc light expanding element interface, the arc light expanding element has inserted inferior arc photosensor again; And being connected with the electric current and voltage expanding element on the electric current and voltage expanding element interface, the electric current and voltage expanding element has inserted from instrument transformer again.
The quantity of electric current and voltage expanding element is by the quantity and the actual needs decision of electric current and voltage expanding element interface.Each electric current and voltage expanding element is by from CPU be no more than 8 form from the electric current and voltage harvester, wherein, be connected with host CPU by electric current and voltage expanding element interface from CPU, all is connected respectively with from CPU from the electric current and voltage harvester, then with from the electric current and voltage harvester be connected from instrument transformer, and each is at least one from what the electric current and voltage harvester connected from instrument transformer quantity.Be used to gather bus voltage signal or/and the current signal of circuit from instrument transformer, therefore, be at least a kind of the voltage transformer summation current transformer from instrument transformer; Be to be responsible for and become the level signal that needs from CPU from the conversion of signals that instrument transformer collects from the function of electric current and voltage harvester; Then be responsible for to handle the data that transmit from the electric current and voltage harvester with storage from CPU, and finish with host CPU between communicate by letter.
The quantity of arc light expanding element is by the quantity and the actual needs decision of arc light expanding element interface.Each arc light expanding element is by inferior CPU and be no more than 16 inferior arc light harvester composition, wherein, inferior CPU is connected with host CPU by arc light expanding element interface, all inferior arc light harvesters are connected with inferior CPU respectively, inferior arc photosensor then is connected with inferior arc light harvester, and the quantity of the inferior arc photosensor of each time arc light harvester connection is at least one.
The course of work of present embodiment is as follows:
At first, the principal voltage current collecting device is provided with initial value, gives relevant logical relation tripgear; Then, minor arc optical sensor and time arc photosensor detect the arclight of control point in real time, and the arc light intensity-conversion is become 4～20mA current signal, transfer to corresponding C PU.Be that the minor arc optical sensor transfers to host CPU with the signal of gathering by minor arc light collection device, inferior arc photosensor transfers to time CPU with the signal of gathering by inferior arc light harvester.Host CPU and time CPU receive after the signal, carry out signal processing and storage.Meanwhile, the principal voltage current collecting device and from the electric current and voltage harvester then by voltage transformer or/and current transformer is gathered the current signal of circuit or/and the voltage signal of bus, and be sent among the corresponding C PU after converting thereof into the level signal that corresponding CPU needs, be that the principal voltage current collecting device transfers to host CPU with the signal of gathering, from the electric current and voltage harvester signal of gathering is transferred among CPU, host CPU and receive signal from CPU after, carry out signal processing and storage.After handling signal from CPU and time CPU, also with result transmission to host CPU, carry out integrated management for host CPU.After host CPU receives current signal, voltage signal and arc optical signal, judge whether to satisfy trip condition, if satisfy, then tripgear is sent corresponding trip signal according to the logical relation of setting, the switchgear action that control is corresponding, and show in real time on demonstration and input unit, thereby realization positions the arc fault point and reports to the police; Otherwise, then do not trip, and the update displayed content.
According to the foregoing description, just can realize the utility model well.
Claims (8)
1. arclight protection system; it is characterized in that; comprise main control unit, minor arc optical sensor and main instrument transformer; wherein; main control unit comprises host CPU; and the power supply that is connected with this host CPU respectively, principal voltage current collecting device, tripgear, demonstration and input unit and minor arc light collection device, described minor arc optical sensor is connected with minor arc light collection device, and main instrument transformer then is connected with the principal voltage current collecting device.
2. a kind of arclight protection system according to claim 1 is characterized in that, also comprises the arc light expanding element that is connected with host CPU by arc light expanding element interface, and the inferior arc photosensor that is connected with this arc light expanding element.
3. a kind of arclight protection system according to claim 2; it is characterized in that; described arc light expanding element comprises the inferior CPU that is connected with arc light expanding element interface, and the inferior arc light harvester that is connected with this time CPU, and described time arc photosensor is connected with time arc light harvester.
4. according to claim 2 or 3 described a kind of arclight protection systems, it is characterized in that, also comprise the electric current and voltage expanding element that is connected with host CPU by electric current and voltage expanding element interface, and be connected with this electric current and voltage expanding element from instrument transformer.
5. a kind of arclight protection system according to claim 4; it is characterized in that; described electric current and voltage expanding element comprise be connected with electric current and voltage expanding element interface from CPU; and with this from CPU be connected from the electric current and voltage harvester, described from instrument transformer be connected from the electric current and voltage harvester.
6. a kind of arclight protection system according to claim 5 is characterized in that the quantity of described arc light expanding element is at least one, and the quantity of the inferior arc light harvester that is connected with each time CPU is no more than 16.
7. a kind of arclight protection system according to claim 6 is characterized in that the quantity of described electric current and voltage expanding element is at least one, and is no more than 8 with each quantity from the electric current and voltage harvester that is connected from CPU.
8. a kind of arclight protection system according to claim 7 is characterized in that, described main instrument transformer, is at least a kind of the voltage transformer summation current transformer respectively from instrument transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120245000XU CN202094617U (en) | 2011-07-01 | 2011-07-01 | Arc light protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120245000XU CN202094617U (en) | 2011-07-01 | 2011-07-01 | Arc light protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202094617U true CN202094617U (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201120245000XU Expired - Lifetime CN202094617U (en) | 2011-07-01 | 2011-07-01 | Arc light protection system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022987A (en) * | 2012-12-25 | 2013-04-03 | 成都星宇节能技术股份有限公司 | Photoelectric arc light protection device |
| CN103022971A (en) * | 2012-12-25 | 2013-04-03 | 成都星宇节能技术股份有限公司 | Integrated measurement and control system for temperature and arc light |
| CN103809043A (en) * | 2012-11-08 | 2014-05-21 | 南京南瑞继保电气有限公司 | Detection discrimination method of arc light fault |
| CN106410970A (en) * | 2016-11-11 | 2017-02-15 | 南京南瑞继保电气有限公司 | Arc light protective device and method with light intensity signal recording function |
| CN114167205A (en) * | 2021-11-22 | 2022-03-11 | 昆明理工大学 | Arc stable arcing detection method based on photoelectric combination |
| CN114167207A (en) * | 2021-11-22 | 2022-03-11 | 昆明理工大学 | Arc starting detection method based on photoelectric combination |
| CN114167208A (en) * | 2021-11-23 | 2022-03-11 | 昆明理工大学 | Electric arc blowout detection method based on electric signals |
-
2011
- 2011-07-01 CN CN201120245000XU patent/CN202094617U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809043A (en) * | 2012-11-08 | 2014-05-21 | 南京南瑞继保电气有限公司 | Detection discrimination method of arc light fault |
| CN103022987A (en) * | 2012-12-25 | 2013-04-03 | 成都星宇节能技术股份有限公司 | Photoelectric arc light protection device |
| CN103022971A (en) * | 2012-12-25 | 2013-04-03 | 成都星宇节能技术股份有限公司 | Integrated measurement and control system for temperature and arc light |
| CN106410970A (en) * | 2016-11-11 | 2017-02-15 | 南京南瑞继保电气有限公司 | Arc light protective device and method with light intensity signal recording function |
| CN114167205A (en) * | 2021-11-22 | 2022-03-11 | 昆明理工大学 | Arc stable arcing detection method based on photoelectric combination |
| CN114167207A (en) * | 2021-11-22 | 2022-03-11 | 昆明理工大学 | Arc starting detection method based on photoelectric combination |
| CN114167205B (en) * | 2021-11-22 | 2024-04-09 | 昆明理工大学 | Electric arc stable arcing detection method based on photoelectric combination |
| CN114167208A (en) * | 2021-11-23 | 2022-03-11 | 昆明理工大学 | Electric arc blowout detection method based on electric signals |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 610041 International Exhibition Trade Center, 2, Pioneer Road, hi tech Development Zone, Sichuan, Chengdu, 7F Patentee after: Chengdu Xingyu Rongke Power Electronics Co., Ltd Address before: 610041 International Exhibition Trade Center, 2, Pioneer Road, hi tech Development Zone, Sichuan, Chengdu, 7F Patentee before: CHENGDU XINGYU ENERGY-SAVING TECHNOLOGY Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111228 |