CN103066585A - Power supply detection and abnormal reverse power transmission control device - Google Patents
Power supply detection and abnormal reverse power transmission control device Download PDFInfo
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- CN103066585A CN103066585A CN2012105381941A CN201210538194A CN103066585A CN 103066585 A CN103066585 A CN 103066585A CN 2012105381941 A CN2012105381941 A CN 2012105381941A CN 201210538194 A CN201210538194 A CN 201210538194A CN 103066585 A CN103066585 A CN 103066585A
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Abstract
The invention provides power supply detection and an abnormal reverse power transmission control used for detecting power supply situations of public power grid and self-contained power supply to user loads and controlling abnormal reverse power transmission situations. The device collects parameters of public power grid side and self-contained power supply side by using electric energy collection devices, and each voltage, electric current and active power value of the public power grid side and the self-contained power supply side are obtained. A microprocessor judges whether the abnormal reverse power transmission situations occur or not according to combinatorial logic between plus-minus of the active power values of the public power grid side and the self-contained power supply side and whether reverse power transmission indicating switch, and controls action of relevant electric switches, so injuries to public power grid servicemen caused by abnormal reverse power transmission of the self-contained power supply are avoided. At the same time, the device can display information such as power supply status of loads and conduct real-time detection of power supply situations of the loads.
Description
Technical field
The present invention relates to a kind of can the monitoring the power supply status of customer power supply system, and can prevent behind grid cut-off that power autonomous unusual reverse power supply jeopardizes the device of grid maintenance personal security to the user to public electric wire net.
Background technology
Along with economic development, society increases severely to the demand of productive power, and many factory and enterprises are to guarantee that can continue to be engaged in activity in production in the situation of grid power blackout has all installed power autonomous.Yet, with respect to the growth that power autonomous number of users is installed, seem particularly not enough for power autonomous supervision, owing to the accident that power autonomous misoperation is caused happens occasionally.Consider the factors such as cost,, power supply reliability less for those loads requires relatively low user, and the mode of manual operation double-throw plug-in strip is often adopted in power autonomous switching.When public electric wire net normally moved, the grid side plug-in strip was closed, and customer charge is connected with electrical network; When electrical network broke down, the user was by manual operation, and the plug-in strip of closed power autonomous side also disconnects the grid side plug-in strip, and customer charge changes into by power autonomous power supply.The cost of hardware design of this mode is lower, if but the user is to power autonomous poor management lattice or personnel operation that error causes easily when power autonomous power supply, and the grid side plug-in strip does not disconnect, and the user is power autonomous to the unusual reverse electric situation of sending of public electric wire net.The unusual reverse electricity that send can serious threat arrive grid maintenance personnel's personal safety, and the power consumption equipment of other users in the electrical network is caused harmful effect.
Summary of the invention
The invention provides and a kind ofly can carry out Real Time Monitoring to the state of customer power supply power supply and prevent the unusual reverse device that send electric situation to occur.Compare this device with traditional double-throw chopper system and can show the load power supply state, and can show the information such as voltage, electric current, active power of power supply.When controller detected by power autonomous power supply, according to the state of the indicator cock of whether oppositely powering, thereby controller was controlled the generation that the action of public electric wire net side electric switch prevents unusual reverse electric power thus supplied automatically.
Concrete scheme is: one group of electric energy collection device is set respectively on the voltage transformer summation current transformer of public electric wire net side and power autonomous side, the output port of electric energy collection device is connected with controller, electric energy collection device sends to controller with the public electric wire net side that collects and the electrical energy parameter of power autonomous side, and controller is judged current supply power mode according to the combinational logic between the state of the positive and negative of public electric wire net side and power autonomous side active power and the indicator cock of whether oppositely powering, whether abnormal oppositely send electricity, whether transmit control signal and make the electric switch action.The combinational logic relation is as follows:
Be to be zero on the occasion of, power autonomous side active power when public electric wire net side active power, and the state of the indicator cock of whether oppositely powering is "No", this Time Controller judges that power supply state powers as public electric wire net, and electric switch remains closed attonity.When public electric wire net side active power is zero, power autonomous side active power be on the occasion of, and the capable of indicating on-off state of whether oppositely powering is "No", microcontroller judges that power supply state is power autonomous power supply, electric switch attonity at this moment.When public electric wire net side active power is negative value, power autonomous side active power be on the occasion of, and when the capable of indicating on-off state of whether oppositely powering is "No", controller will judge that this moment, system was in unusual reverse power supply state, and transmit control signal so that public electric wire net side electric switch is done the disconnection action.When truly having special circumstances power autonomously oppositely to power to electrical network, the indicator cock but whether manual operation oppositely powers, making its state is "Yes", then working as public electric wire net side active power is negative value, power autonomous side active power is for thinking that on the occasion of Time Controller power supply state is normal oppositely power supply, and public electric wire net side electric switch is kept closed is failure to actuate.When public electric wire net side active power be on the occasion of, power autonomous side active power is zero, and the capable of indicating on-off state of whether oppositely powering is "Yes", and this moment, microcontroller judged that power supply state is for unusually powering, device screen sends alarm signal, and electric switch remains closed attonity.When recording public electric wire net side active power and power autonomous side active power and be zero, microcontroller judges and is the line outage state at this moment, and device screen sends alarm signal, and electric switch remains closed attonity.
Description of drawings
Fig. 1 is schematic diagram of the present invention.
1. public electric wire net side electric energy collection devices wherein, 2. power autonomous side electric energy collection device, the indicator cock of 3. whether oppositely powering, 4. controller, 5. LCDs, 6. serial communication interface, 7. electric switch.
Specific embodiments
In order to deepen the understanding of the present invention, below in conjunction with drawings and Examples invention is described further.
In Fig. 1, public electric wire net side and power autonomous side arrange respectively public electric wire net side electric energy collection device (1) and power autonomous side electric energy collection device (2), electric energy collection device gathers the voltage of public electric wire net side and power autonomous side, electric current, active power information sends to microcontroller (4), when public electric wire net normally moves, customer charge is by mains supply, the indicator cock (3) of whether oppositely powering keeps acquiescence "No" state, at this moment this device LCDs (5) shows that supply power mode is " public electric wire net power supply ", and the voltage of demonstration public electric wire net side, electric current, the instantaneous value of active power, electric switch (7) is kept closed is failure to actuate.The faults such as power failure occur when electrical network, customer charge by the people for switching to by power autonomous power supply, and the indicator cock (3) of whether oppositely powering keeps the "No" state not move, at this moment the value of microcontroller (4) the active power signal that will collect according to public electric wire net side electric energy collection device (1) is judged power supply state, if this moment, public electric wire net side active power was zero, then LCDs (5) will show that this moment, supply power mode was " power autonomous power supply ", and show power autonomous voltage, electric current, active power instantaneous value; If this moment, grid side active power was negative value, then abnormal is oppositely powered, and microcontroller (4) will send control signal disconnects electric switch (7).Only the indicator cock (3) of whether oppositely powering need be got to the "Yes" state when needs are power autonomous when oppositely powering to public electric wire net, this moment, public electric wire net side active power was negative value, LCDs (5) shows that supply power mode is " normal oppositely power supply ", and electric switch (7) is kept closed is failure to actuate.If record public electric wire net side active power on the occasion of, power autonomous side active power is zero, and indicator cock (3) state of whether oppositely powering is "Yes", then LCDs this moment (5) flicker " unusual power supply " is reported to the police, until whether manual operation oppositely powers indicator cock (3) makes its state become "No", alarm release.If record public electric wire net side and power autonomous side active power and all be zero, then LCDs (5) shows that power supply state is " line outage ".
Claims (5)
1. one kind supplies pyroelectric monitor and the unusual anti-electric prevention and control device that send, comprise public electric wire net side electric energy collection device (1), power autonomous side electric energy collection device (2), the indicator cock (3) of whether oppositely powering, microcontroller (4), LCDs (5), serial communication interface (6) and electric switch (7), it is characterized in that: the signal input part of the electric energy collection device of public electric wire net side (1) and the voltage transformer of public electric wire net end of incoming cables, current transformer connects, signal output part is connected with controller (4), the signal input part of power autonomous side electric energy collection device (2) and the voltage transformer of power autonomous end, current transformer connects, signal output part is connected with controller (4), electric switch (7) is connected between public electric wire net inlet wire and the customer charge, the indicator cock (3) of whether oppositely powering, LCDs (5), serial communication interface (6) is connected 7 with electric switch) control circuit be connected with microcontroller (4) respectively.
2. the power autonomous side electric energy collection device of public electric wire net side electric energy collection device (1) (2) described in according to claim 1, its spy is: can measure the active power of public electric wire net side and power autonomous side, microcontroller (4) will judge whether that abnormal oppositely send electric situation according to the combinational logic between the state of the positive and negative of public electric wire net side and power autonomous side active power and indicator cock (3) that whether oppositely power.
3. the indicator cock (3) of whether oppositely powering described in according to claim 1, it is characterized in that: "Yes" and "No" two states are arranged, its default conditions are "No", when being in acquiescence "No" state, if record public electric wire net side active power and be negative value and power autonomous side active power on the occasion of, then microcontroller (4) judges that be the unusually reverse electric situation of sending this moment; When needs are power autonomous when oppositely powering to public electric wire net, the indicator cock (3) of will whether oppositely powering is got to the "Yes" state, then when to record public electric wire net side active power be negative value and power autonomous side active power on the occasion of the time, microcontroller (4) is judged at this moment as normally oppositely sending electricity; If record public electric wire net side active power for being zero on the occasion of, power autonomous side active power, and indicator cock (3) state of whether oppositely powering is "Yes", and then microcontroller (4) judges that this moment is for unusually powering.
4. the LCDs (5) described in according to claim 1, it is characterized in that: when customer charge is powered by public electric wire net, LCDs (5) shows that supply power mode is " public electric wire net power supply ", and shows the instantaneous value of voltage, electric current and the active power of public electric wire net side this moment; When customer charge during by power autonomous power supply, show that supply power mode be " power autonomous power supply ", and show the at this moment instantaneous value of power autonomous side voltage, electric current and active power; When needs are power autonomous when oppositely powering to public electric wire net, show that the power supply antimode be " normal oppositely power supply ", and show the at this moment instantaneous value of voltage, electric current and the active power of power autonomous side; If record public electric wire net side active power on the occasion of, power autonomous side active power is zero, and indicator cock (3) state of whether oppositely powering is "Yes", then LCDs this moment (5) flicker " unusual power supply " is reported to the police, until whether manual operation oppositely powers indicator cock (3) makes its state become "No", alarm release; All be zero when recording public electric wire net side and power autonomous side active power, then LCDs (5) shows that power supply state is " line outage ".
5. the electric switch (7) described in according to claim 1, it is characterized in that: when microcontroller (4) judged that abnormal oppositely send electric situation, electric switch (7) moved, and the disconnection public electric wire net is connected with customer charge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105381941A CN103066585A (en) | 2012-12-13 | 2012-12-13 | Power supply detection and abnormal reverse power transmission control device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105381941A CN103066585A (en) | 2012-12-13 | 2012-12-13 | Power supply detection and abnormal reverse power transmission control device |
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| CN103066585A true CN103066585A (en) | 2013-04-24 |
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| CN2012105381941A Pending CN103066585A (en) | 2012-12-13 | 2012-12-13 | Power supply detection and abnormal reverse power transmission control device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746375A (en) * | 2014-01-15 | 2014-04-23 | 国家电网公司 | Automatic small-power supply removal device |
| CN105071361A (en) * | 2015-08-18 | 2015-11-18 | 国网山东桓台县供电公司 | Device for intelligently preventing disordered reverse power transmission for power system |
| CN110137043A (en) * | 2019-06-25 | 2019-08-16 | 国家电网有限公司 | A kind of limiting device preventing the anti-power transmission of low pressure |
| CN110649700A (en) * | 2019-10-15 | 2020-01-03 | 深圳市高斯宝电气技术有限公司 | Method for preventing user circuit from reversely transmitting power to power grid |
| CN110768370A (en) * | 2019-10-18 | 2020-02-07 | 杭州东氿科技有限公司 | Intelligent control system and method for electrical equipment of power supply and distribution system |
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| FR2775847A1 (en) * | 1998-03-06 | 1999-09-10 | Schneider Electric Ind Sa | Differential protection for electrical circuits incorporating compensation for normal leakage currents |
| CN2739867Y (en) * | 2004-04-06 | 2005-11-09 | 李金光 | Automatic switching device for emergency power supply |
| CN102222971A (en) * | 2011-05-26 | 2011-10-19 | 吴斌 | Device capable of preventing abnormal reversely-fed electricity |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746375A (en) * | 2014-01-15 | 2014-04-23 | 国家电网公司 | Automatic small-power supply removal device |
| CN105071361A (en) * | 2015-08-18 | 2015-11-18 | 国网山东桓台县供电公司 | Device for intelligently preventing disordered reverse power transmission for power system |
| CN110137043A (en) * | 2019-06-25 | 2019-08-16 | 国家电网有限公司 | A kind of limiting device preventing the anti-power transmission of low pressure |
| CN110649700A (en) * | 2019-10-15 | 2020-01-03 | 深圳市高斯宝电气技术有限公司 | Method for preventing user circuit from reversely transmitting power to power grid |
| CN110649700B (en) * | 2019-10-15 | 2024-05-17 | 深圳市高斯宝电气技术有限公司 | Method for preventing user circuit from reversely transmitting power to power grid |
| CN110768370A (en) * | 2019-10-18 | 2020-02-07 | 杭州东氿科技有限公司 | Intelligent control system and method for electrical equipment of power supply and distribution system |
| CN110768370B (en) * | 2019-10-18 | 2021-12-07 | 杭州东氿科技有限公司 | Intelligent control system and method for electrical equipment of power supply and distribution system |
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Application publication date: 20130424 |