CN103746375A - Automatic small-power supply removal device - Google Patents
Automatic small-power supply removal device Download PDFInfo
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- CN103746375A CN103746375A CN201410017574.XA CN201410017574A CN103746375A CN 103746375 A CN103746375 A CN 103746375A CN 201410017574 A CN201410017574 A CN 201410017574A CN 103746375 A CN103746375 A CN 103746375A
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- power supply
- removal device
- branch
- automatic small
- voltage
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Abstract
The invention discloses an automatic small-power supply removal device. The device is connected between a low-voltage side master switch (1) of a power distribution transformer and each branch of switch (2). The automatic small-power supply removal device is formed by connecting a main comprehensive electric quantity transducer (3), branch comprehensive electric quantity transducers (4), a PLC (programmable logic controller) control unit (5) and a man-machine interface unit (6) in an electric loop mode. The automatic small-power supply removal device is simple in structure, intelligently controlled, maintenance-free, small in size, easy to mount and compensated in place; whether the condition that electricity is sent to high voltage from the low voltage is judged by the collected data, and removal is performed by taking effective measures.
Description
Technical field
The present invention relates to a kind of small power supply automatic cut-off device, is for standby power supply device for excising is installed in public distribution.
Background technology
The technology and equipment that can generate electricity along with little wind power generation, Sunny universal, common 220V low-voltage customer is installed wind energy and solar power plant is widely used as stand-by power supply; But it is very professional that domestic consumer can not guarantee the service condition of equipment, may cause small power supply to public 400V distribution power transmission, in the situation that capacity is enough, also may be by distribution transforming to medium voltage distribution network power transmission.When power distribution line maintenance, because low-voltage customer wind energy or solar power plant are as stand-by power supply connecting system, if when the time comes to the anti-power transmission of system, the personal safety to maintainer is caused to great threat, will there is great potential safety hazard like this.
Summary of the invention
The object of the invention is to: a kind of small power supply automatic cut-off device is provided, utilize the data that gather to judge whether to exist low pressure to send electric situation to high pressure, while finding small power supply to the anti-power transmission of system in 400V current supply circuit, can excise fast small power supply branch road or low-voltage distribution transformer master switch
The fail safe of the person and equipment while guaranteeing power distribution network interruption maintenance.
Technical solution of the present invention is: this device is connected between distribution transformer low-pressure side master switch and each branch switch, by the comprehensive electric parameters transducer in main line, the comprehensive electric parameters transducer of branch road, PLC control unit and human and machine interface unit, according to electric circuit type, is formed by connecting.
The present invention is simple in structure, Based Intelligent Control, non-maintaining, volume is little, installs easily, local compensation, gather each branch current, voltage, power, frequency, information is analyzed, judged, ensure while finding small power supply in low-voltage power supply loop, can be fast by this loop excision, the fail safe of the person and equipment while guaranteeing power distribution network interruption maintenance.
Accompanying drawing explanation
Fig. 1 is that circuit of the present invention connects block diagram.
Fig. 2 is circuit catenation principle figure of the present invention.
In figure: 1 master switch, 2 branch switchs, the 3 comprehensive electric parameters transducers in main line, the comprehensive electric parameters transducer of 4 branch road, 5 PLC control units, 6 human and machine interface unit.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
As shown in Figure 1, 2, this device is connected between distribution transformer low-pressure side master switch 1 and each branch switch 2, by the comprehensive electric parameters transducer 3 in main line, the comprehensive electric parameters transducer 4 of branch road, PLC control unit 5 and human and machine interface unit 6, according to electric circuit type, is formed by connecting.
The circuit of this device connects and is divided into primary side major loop and secondary side control loop, primary side major loop carries out wiring in such a way: end of incoming cables connects between 400V master switch and each branch switch, by three comprehensive electric parameters transducers of branch road, be connected with three branch switchs respectively, the comprehensive electric parameters transducer in main line is connected with master switch, the voltage signal of PLC collection master switch carries out system and has or not dead electricity judgement, by the laggard action of PLC logical operation for export, relevant information is reflected by man-machine interface simultaneously, in secondary side control loop connects, by four comprehensive electric parameters transducer conversions, gather main line voltage, electric current, power, the voltage of frequency He San road branch road, electric current, power, frequency, PLC carries out by RS-485 universal serial bus and comprehensive electric parameters transducer the relevant parameter information that communication gathers power supply, after PLC logical operation is processed at man-machine interface (Human Machine Interaction, hereinafter to be referred as HMI) show, relevant logical relation arranges (by cryptoguard relative parameters setting is set) on HMI, the signal output corresponding according to interrelated logic relational implementation (main line and each branch road be a corresponding road passive relay output respectively), PLC logical operation simultaneously after processing is fed back this information, and prop up the way outlet trip time through certain hour t1(, this time can adjust) rear this branch road of outlet jumping, systemic circulation monitoring, this loop has or not action launching condition, if can return in the time at t1, the outlet of being failure to actuate, if still there is operation condition after the time through t1, main line switch trip after the t2 time (main line outlet trip time).
Each parameter acquisition mode: voltage from bus directly and connect collection; Electric current gathers the electric current of secondary current instrument transformer by precision current transformer; Voltage and current after power collecting carries out calculation process; Frequency from bus directly and connect collection; Parameter measurement scope (being accurate to 2 significant digits): electric current: 0 ~ 10A(secondary side) accurately measure, do not damage in 100A5s; Voltage: 0 ~ 500V; Frequency: 0 ~ 60Hz.
Claims (1)
1. small power supply automatic cut-off device, it is characterized in that: this device is connected between distribution transformer low-pressure side master switch (1) and each branch switch (2), by the comprehensive electric parameters transducer in main line (3), the comprehensive electric parameters transducer of branch road (4), PLC control unit (5) and human and machine interface unit (6), according to electric circuit type, be formed by connecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410017574.XA CN103746375A (en) | 2014-01-15 | 2014-01-15 | Automatic small-power supply removal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410017574.XA CN103746375A (en) | 2014-01-15 | 2014-01-15 | Automatic small-power supply removal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103746375A true CN103746375A (en) | 2014-04-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410017574.XA Pending CN103746375A (en) | 2014-01-15 | 2014-01-15 | Automatic small-power supply removal device |
Country Status (1)
| Country | Link |
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| CN (1) | CN103746375A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162248A (en) * | 2015-08-18 | 2015-12-16 | 国网山东桓台县供电公司 | Intelligent disordered reverse feeding prevention method for power system |
| CN114465214A (en) * | 2022-03-17 | 2022-05-10 | 国网浙江省电力有限公司宁波供电公司 | Fault splitting configuration method based on 5G communication technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222971A (en) * | 2011-05-26 | 2011-10-19 | 吴斌 | Device capable of preventing abnormal reversely-fed electricity |
| CN202633925U (en) * | 2012-06-29 | 2012-12-26 | 山东电力集团公司潍坊供电公司 | Power-grid inverted-feed protection device |
| CN103066585A (en) * | 2012-12-13 | 2013-04-24 | 中国矿业大学 | Power supply detection and abnormal reverse power transmission control device |
| CN103368169A (en) * | 2013-07-07 | 2013-10-23 | 国家电网公司 | Reverse power transmission protector |
-
2014
- 2014-01-15 CN CN201410017574.XA patent/CN103746375A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222971A (en) * | 2011-05-26 | 2011-10-19 | 吴斌 | Device capable of preventing abnormal reversely-fed electricity |
| CN202633925U (en) * | 2012-06-29 | 2012-12-26 | 山东电力集团公司潍坊供电公司 | Power-grid inverted-feed protection device |
| CN103066585A (en) * | 2012-12-13 | 2013-04-24 | 中国矿业大学 | Power supply detection and abnormal reverse power transmission control device |
| CN103368169A (en) * | 2013-07-07 | 2013-10-23 | 国家电网公司 | Reverse power transmission protector |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162248A (en) * | 2015-08-18 | 2015-12-16 | 国网山东桓台县供电公司 | Intelligent disordered reverse feeding prevention method for power system |
| CN105162248B (en) * | 2015-08-18 | 2019-01-18 | 国网山东桓台县供电公司 | Power System Intelligent prevents unordered anti-power transmission method |
| CN114465214A (en) * | 2022-03-17 | 2022-05-10 | 国网浙江省电力有限公司宁波供电公司 | Fault splitting configuration method based on 5G communication technology |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140423 |