CN102789932A - Electronic circuit breaker for solar cell module string and protection method - Google Patents
Electronic circuit breaker for solar cell module string and protection method Download PDFInfo
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- CN102789932A CN102789932A CN2011101320287A CN201110132028A CN102789932A CN 102789932 A CN102789932 A CN 102789932A CN 2011101320287 A CN2011101320287 A CN 2011101320287A CN 201110132028 A CN201110132028 A CN 201110132028A CN 102789932 A CN102789932 A CN 102789932A
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- free device
- shunt release
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Abstract
The invention discloses an electronic circuit breaker for a solar cell module string and a protection method. The electronic circuit breaker comprises a main contact (1), a trip-free device (2), a shunt trip device (3), a coil driver (4), a fault discrimination unit (5), a voltage measurement and modulation unit (6), a current measurement and modulation unit (7), a hand trip device (8) and a manual switch-on device (9), wherein the voltage measurement and modulation unit (6) and the current measurement and modulation unit (7) are connected with the fault discrimination unit (5) respectively, the fault discrimination unit (5) is connected with the coil driver (4), the coil driver (4) is connected with the shunt trip device (3), the shunt trip device (3), the hand trip device (8) and the manual switch-on device (9) are connected with the trip-free device (2) respectively, and the trip-free device (2) is connected with the main contact (1). By the aid of the electronic circuit breaker and the protection method, faults such as short circuit, reverse connection and overvoltage of the solar cell module string can be determined quickly, a circuit of the solar cell module string can be effectively cut off, a solar cell module and a cable can be protected, fire caused by electric arcs is avoided, and a manual switch-off and switch-on function and a remote control circuit breaker switch-off function are provided.
Description
Technical field
The present invention relates to solar photovoltaic technology, low voltage electrical apparatus technology, particularly a kind of circuit breaker and guard method that is used for the solar module string can be widely used in the renewable energy system of all kinds of use solar components.
Background technology
At global warming, under the urgent situation of Ecological environment worsening and conventional energy resource shortage of resources, be that the renewable energy power generation technology that core makes up obtains fast development and application with all kinds of solar components.But in the solar power station of going into operation, the fire generation that the electric fault of solar components string direct current system is often arranged and cause.Original solar components protection equipment and counnter attack exist defective and deficiency; One of reason is to be not sure of short circuit and draws faults such as electric arc and cut-out group serializer circuit; Cause cable, equipment or assembly to damage; Reduce the utilance of solar energy resources, produced serious economy loss, influenced the promotion and application of solar tracking system.
Summary of the invention
To the problems referred to above; The invention provides a kind of electronic breaker and guard method that is used for the solar module string; Can judge faults such as the reversal connection of solar battery group string, short circuit, overvoltage fast; Effectively cut off the solar battery group serializer circuit, protection assembly and cable, prevent electric arc and cause the generation of fire manual divide-shut brake function, remote control cut-out function are arranged in addition.
A kind of electronic breaker that is used for the solar module string; Comprise main contacts, trip free device, shunt release, coil drive, fault distinguishing unit, voltage measurement and conditioning unit, current measurement and conditioning unit, hand trip gear and closing by hand device; Said voltage measurement links to each other with said fault distinguishing unit respectively with the conditioning unit with conditioning unit, current measurement, and said fault distinguishing unit also is connected with coil drive; Said coil drive also is connected with shunt release; Said shunt release, hand trip gear, closing by hand device are connected with the trip free device respectively; Said trip free device is connected with main contacts.
A kind of guard method that is used for the circuit breaker of solar module string; Said shunt release, hand trip gear, closing by hand device cut off main contacts through the action of trip free device; Current measurement will be picked up group crosstalk stream signal with the conditioning unit and sent into the signal fault judgement unit, and voltage measurement will be picked up the group crosstalk with the conditioning unit and pressed signal to send into the signal fault judgement unit, when the solar module serializer circuit is short-circuited; Judged in the fault distinguishing unit: current signal * resistance constant ﹢ voltage constant ﹤ voltage signal relation is set up; Order coil drive unit action drives shunt release, shunt release triggers the action of trip free device and cuts off main contacts, when the reversal connection of solar module string both positive and negative polarity; Or when backward current occurring; Judge that in the fault distinguishing unit assembly crosstalk presses signal, current signal direction reverse, order coil drive unit action drives shunt release, shunt release triggers the action of trip free device and cuts off main contacts; When solar module crosstalk pressure exceeds normal range (NR); Judge that in the fault distinguishing unit solar module crosstalk pressure signal surpasses higher limit, order coil drive unit action drives shunt release, shunt release triggers the action of trip free device and the cut-out main contacts.
Be used for the electronic breaker guard method of solar module string; When the reversal connection of solar module string both positive and negative polarity when circuit constitutes the loop or solar module crossfire when crossing backward current; Judge that in the fault distinguishing unit solar module crosstalk presses signal, current signal direction reverse; Fault distinguishing cell command coil drive action drives shunt release, shunt release trigger the action of trip free device and cut off main contacts.
Be used for the electronic breaker guard method of solar module string; When solar module crosstalk pressure exceeds normal range (NR); Judge that in the fault distinguishing unit solar module crosstalk pressure signal surpasses higher limit; Fault distinguishing cell command coil drive unit action drives shunt release, shunt release trigger the action of trip free device and cut off main contacts.
Be used for the electronic breaker guard method of solar module string, when the solar module string is installed or overhauled, use hand trip gear to trigger action of trip free device and cut-out main contacts; Use the closing by hand device, trigger the action of trip free device and closed main contacts, and then reach the purpose of protection solar components string and operator safety.
The electronic breaker that is used for the solar module string uses remote control separating brake function, through the action of control line Long-distance Control shunt release, and then triggers the action of trip free device and the cut-out main contacts, realizes the function of Long-distance Control circuit breaker disjunction.
Useful achievement of the present invention is to be to carry out fault judgement and divide-shut brake control through measuring solar module string voltage and current signal; Realize error protections such as solar module string short circuit; Guard method of the present invention is when solar components serializer circuit failed because; Judge the establishment of " current signal * resistance constant ﹢ voltage constant ﹤ voltage signal " relation through measuring solar energy group string working point (voltage, electric current), triggering is cut off main contacts and is protected the solar components string.The present invention realizes solar module string error protection, and considers installation requirement, has strengthened the fail safe and the reliability of solar power generation.And the consideration installation requirement, strengthened the fail safe and the reliability of solar power generation.
Description of drawings
Fig. 1 is a system principle diagram of the present invention.
Fig. 2 is that circuit breaker of the present invention is to solar components string protection range figure.
Embodiment
For making inner characteristic of the present invention and beneficial effect be easier to understand, it is elaborated below in conjunction with instance and accompanying drawing.
Fig. 1 shows a kind of principle flow chart that is used for the electronic breaker of solar module string of the present invention.As shown in the figure, circuit breaker of the present invention comprises: main contacts 1, trip free device 2, shunt release 3, coil drive unit 4, fault distinguishing unit 5, voltage measurement and conditioning unit 6, current measurement and conditioning unit 7, hand trip gear 8 and closing by hand device 9.Voltage measurement links to each other with said fault distinguishing unit 5 respectively with conditioning unit 7 with conditioning unit 6, current measurement, and fault distinguishing unit 5 also is connected with coil drive 4; Coil drive 4 also is connected with shunt release 3; Shunt release 3, hand trip gear 8, closing by hand device 9 are connected with trip free device 2 respectively; Trip free device 2 is connected with main contacts 1.
The solar module string is connected in series with circuit breaker, and current measurement will be picked up group crosstalk stream signal and send into signal fault judgement unit 5 with conditioning unit 7, and voltage measurement will be picked up the group crosstalk with conditioning unit 6 and pressed signal and send into signal fault judgement unit 5.When solar components serializer circuit failed because; Solar components string as shown in Figure 2 working point gets into the short-circuit protection district; 5 judge current signal * resistance constant ﹢ voltage constant ﹤ voltage signal relation establishment in the fault distinguishing unit; Order coil drive unit 4 action drives shunt releases 3, shunt release 3 triggers trip free device moving 2 and does and cut-out main contacts 1.
When the both positive and negative polarity reversal connection of solar components string when circuit constitutes the loop or solar components crossfire when crossing backward current; Solar components string as shown in Figure 2 working point gets into the reverse connecting protection district; 5 judge that the assembly crosstalks press signals, current signal direction reverse in the fault distinguishing unit; Order coil drive unit 4 action drives shunt releases 3, shunt release 3 trigger 2 actions of trip free device and cut off main contacts 1.
When solar module voltage exceeds normal range (NR); Solar components string as shown in Figure 2 working point gets into the overvoltage protection district; 5 judge that assembly crosstalk pressure signal surpasses higher limit in the fault distinguishing unit; Order coil drive unit 4 action drives shunt releases 3, shunt release 3 trigger 2 actions of trip free device and cut off main contacts 1.
When the solar components string is installed or overhauled, can use hand trip gear 8 to trigger 2 actions of trip free device and cut-out main contacts 1; Can use closing by hand device 9, trigger 2 actions of trip free device and closed main contacts 1.And then reach the purpose of protection solar components string and operator safety.
Further, a kind of circuit breaker that is used for the solar module string of the present invention can use remote control separating brake function.Can move through control line Long-distance Control shunt release 3, and then trigger 2 actions of trip free device and cut off main contacts 1, realize the function of Long-distance Control circuit breaker disjunction.
Claims (6)
1. electronic breaker that is used for the solar module string; It is characterized in that comprising: main contacts (1), trip free device (2), shunt release (3), coil drive (4), fault distinguishing unit (5), voltage measurement and conditioning unit (6), current measurement and conditioning unit (7), hand trip gear (8) and closing by hand device (9); Said voltage measurement links to each other with said fault distinguishing unit (5) respectively with conditioning unit (7) with conditioning unit (6), current measurement, and said fault distinguishing unit (5) also is connected with coil drive (4); Said coil drive (4) also is connected with shunt release (3); Said shunt release (3), hand trip gear (8), closing by hand device (9) are connected with trip free device (2) respectively; Said trip free device (2) is connected with main contacts (1).
2. electronic breaker guard method that is used for the solar module string; It is characterized in that said shunt release (3), hand trip gear (8), closing by hand device (9) cut off main contacts (1) through trip free device (2) action; Current measurement will be picked up solar module crosstalk stream signal and send into signal fault judgement unit (5) with conditioning unit (7); Voltage measurement will be picked up the solar module crosstalk with conditioning unit (6) and pressed signal and send into signal fault judgement unit (5); When solar module serializer circuit failed because; Judge in fault distinguishing unit (5): current signal * resistance constant ﹢ voltage constant ﹤ voltage signal relation is set up; Order coil drive unit (4) action drives shunt release (3), shunt release (3) trigger trip free device (2) action and cut off main contacts (1).
3. the electronic breaker guard method that is used for the solar module string according to claim 2; It is characterized in that when the both positive and negative polarity reversal connection of solar module string constitutes the loop to circuit; Or when the solar module crossfire is crossed backward current; Judge that in fault distinguishing unit (5) the solar module crosstalk presses signal, current signal direction reverse; Fault distinguishing unit (5) order coil drive (4) action drives shunt release (3), shunt release (3) triggers trip free device (2) action and cuts off main contacts (1).
4. the electronic breaker guard method that is used for the solar module string according to claim 2; It is characterized in that: when solar module crosstalk pressure exceeds normal range (NR); Judge that in fault distinguishing unit (5) solar module crosstalk pressure signal surpasses higher limit; Fault distinguishing unit (5) order coil drive unit (4) action drives shunt release (3), shunt release (3) triggers trip free device (2) action and cuts off main contacts (1).
5. the electronic breaker guard method that is used for the solar module string according to claim 2; It is characterized in that when the solar module string is installed or overhauled, use hand trip gear (8) to trigger trip free device (2) action and cut-out main contacts (1); Use closing by hand device (9), trigger trip free device (2) action and closed main contacts (1), and then reach the purpose of protection solar components string and operator safety.
6. a kind of electronic breaker that is used for the solar module string according to claim 2; It is characterized in that using remote control separating brake function; Move through control line Long-distance Control shunt release (3); And then trigger trip free device (2) action and cut-out main contacts (1), realize the function of Long-distance Control circuit breaker disjunction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101320287A CN102789932A (en) | 2011-05-20 | 2011-05-20 | Electronic circuit breaker for solar cell module string and protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101320287A CN102789932A (en) | 2011-05-20 | 2011-05-20 | Electronic circuit breaker for solar cell module string and protection method |
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| Publication Number | Publication Date |
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| CN102789932A true CN102789932A (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101320287A Pending CN102789932A (en) | 2011-05-20 | 2011-05-20 | Electronic circuit breaker for solar cell module string and protection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571847A (en) * | 2019-08-01 | 2019-12-13 | 华为技术有限公司 | Fault isolation device, direct-current boosting device and inversion device |
Citations (5)
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| CN2560138Y (en) * | 2002-06-26 | 2003-07-09 | 刘生仁 | Loading branch intelligent circuit breaker |
| CN2812271Y (en) * | 2005-08-02 | 2006-08-30 | 江苏凯隆电器有限公司 | Operating mechanism for circuit breaker |
| CN201117610Y (en) * | 2007-08-24 | 2008-09-17 | 郭黎 | Intelligent circuit breaker |
| CN201717605U (en) * | 2010-06-25 | 2011-01-19 | 厦门市同耀电器实业有限公司 | Visualized leakage protecting device of electric cabinet |
| CN202111031U (en) * | 2011-05-20 | 2012-01-11 | 中环光伏系统有限公司 | Electronic type circuit breaker for solar battery pack string |
-
2011
- 2011-05-20 CN CN2011101320287A patent/CN102789932A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2560138Y (en) * | 2002-06-26 | 2003-07-09 | 刘生仁 | Loading branch intelligent circuit breaker |
| CN2812271Y (en) * | 2005-08-02 | 2006-08-30 | 江苏凯隆电器有限公司 | Operating mechanism for circuit breaker |
| CN201117610Y (en) * | 2007-08-24 | 2008-09-17 | 郭黎 | Intelligent circuit breaker |
| CN201717605U (en) * | 2010-06-25 | 2011-01-19 | 厦门市同耀电器实业有限公司 | Visualized leakage protecting device of electric cabinet |
| CN202111031U (en) * | 2011-05-20 | 2012-01-11 | 中环光伏系统有限公司 | Electronic type circuit breaker for solar battery pack string |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571847A (en) * | 2019-08-01 | 2019-12-13 | 华为技术有限公司 | Fault isolation device, direct-current boosting device and inversion device |
| WO2021017654A1 (en) * | 2019-08-01 | 2021-02-04 | 华为技术有限公司 | Fault isolation apparatus, direct current boosting apparatus and inversion apparatus |
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Application publication date: 20121121 |