CN102193049B - Alarm circuit for reversed polarity of photovoltaic inverter - Google Patents
Alarm circuit for reversed polarity of photovoltaic inverter Download PDFInfo
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- CN102193049B CN102193049B CN201110171185.9A CN201110171185A CN102193049B CN 102193049 B CN102193049 B CN 102193049B CN 201110171185 A CN201110171185 A CN 201110171185A CN 102193049 B CN102193049 B CN 102193049B
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Abstract
The invention discloses an alarm circuit for reversed polarity of a photovoltaic inverter, and relates to the field of photovoltaic inverters. The alarm circuit comprises a positive terminal, a negative terminal, a current-limiting sub-circuit, a voltage-stabilizing sub-circuit, a buzzer and a first diode, wherein the negative terminal is connected with a first end of the current-limiting sub-circuit; a second end of the current-limiting sub-circuit is connected with the anode of the voltage-stabilizing sub-circuit and the first end of the buzzer; the cathode of the voltage-stabilizing sub-circuit and the second end of the buzzer are connected with the anode of the first diode; and the cathode of the first diode is connected with the negative terminal. The alarm circuit sends voice prompt through the buzzer when the direct current input polarity of the photovoltaic inverter is connected reversely, and can prompt constructors to correct mistakes in time, so that reworking is reduced, and the construction efficiency is improved.
Description
Technical field
The present invention relates to photovoltaic DC-to-AC converter technical field, particularly a kind of reversed polarity alarming circuit for photovoltaic DC-to-AC converter.
Background technology
Along with World Environment Problems is constantly taken seriously and national energy strategy problem, large-scale development novel energy has obtained the generally attention of countries in the world, New Energy Industry becomes industry with fastest developing speed in the world, and solar electrical energy generation will surpass nuclear power in 21st century becomes one of most important basic energy resource.
Photovoltaic DC-to-AC converter is important component part and the key link of photovoltaic generating system, and the direct current that solar cell produces must change into after alternating current by photovoltaic DC-to-AC converter could be grid-connected or use from net.
Current photovoltaic DC-to-AC converter mostly has direct current input reversed polarity protection circuit, but this holding circuit can only protect inverter self not damage, and can not remind in time workmen to correct a mistake, and causes photovoltaic generating system construction to do over again, inefficiency.
Therefore a kind of photovoltaic DC-to-AC converter reversed polarity alarming circuit of necessary design, to remind in time workmen to correct a mistake, improves photovoltaic generating system operating efficiency.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is: how a kind of reversed polarity alarming circuit for photovoltaic DC-to-AC converter is provided, to can remind in time workmen to correct a mistake, improves operating efficiency when the direct current input reverse polarity connection of photovoltaic DC-to-AC converter.
(2) technical scheme
For solving the problems of the technologies described above, the present invention improves a kind of reversed polarity alarming circuit for photovoltaic DC-to-AC converter, and it comprises: positive terminals, negative terminals, current limliting electronic circuit, voltage stabilizing electronic circuit, hummer and the first diode; Described negative terminals connect the first end of described current limliting electronic circuit, the second end of described current limliting electronic circuit connects the positive pole of described voltage stabilizing electronic circuit and the first end of described hummer, the second end of the negative pole of described voltage stabilizing electronic circuit and described hummer is connected the positive pole of described the first diode, and the negative pole of described the first diode connects described negative terminals.
Preferably, described current limliting electronic circuit comprises m resistance; Wherein, the first end of the 1st resistance is the first end of described current limliting electronic circuit, and the second end of j-1 resistance connects the first end of j resistance, and the second end of m resistance is the second end of described current limliting electronic circuit, the value of m is more than or equal to the value of 1, j from 2 to m.
Preferably, described m value is 5.
Preferably, described voltage stabilizing electronic circuit comprises n voltage stabilizing diode, the positive pole of the just very described voltage stabilizing electronic circuit of the 1st voltage stabilizing diode, the negative pole of i-1 voltage stabilizing diode connects the positive pole of i voltage stabilizing diode, the negative pole of n voltage stabilizing diode is the negative pole of described voltage stabilizing electronic circuit, the tube voltage drop sum of a described n voltage stabilizing diode is mated with the operating voltage of described hummer, and the value of i is from 2 to n.
Preferably, described n value is 7.
Preferably, the described reversed polarity alarming circuit for photovoltaic DC-to-AC converter also comprises the second diode; Described negative terminals connect the first end of described current limliting electronic circuit, the second end of described current limliting electronic circuit connects the positive pole of described the second diode, the negative pole of described the second diode connects the positive pole of described voltage stabilizing electronic circuit and the first end of described hummer, the second end of the negative pole of described voltage stabilizing electronic circuit and described hummer is connected the positive pole of described the first diode, and the negative pole of described the first diode connects described negative terminals.
Preferably, the described reversed polarity alarming circuit for photovoltaic DC-to-AC converter also comprises electric capacity; The first end of described electric capacity connects the first end of the second end of described current limliting electronic circuit, described hummer and the positive pole of described voltage stabilizing electronic circuit; The second end of described electric capacity connects the positive pole of the second end of described hummer, the negative pole of described voltage stabilizing electronic circuit and described the first diode.
Preferably, the described reversed polarity alarming circuit for photovoltaic DC-to-AC converter also comprises the 3rd diode; The negative pole of described the 3rd diode connects the first end of the second end of described current limliting electronic circuit, described hummer and the positive pole of described voltage stabilizing electronic circuit; The positive pole of described the 3rd diode connects the positive pole of the second end of described hummer, the negative pole of described voltage stabilizing electronic circuit and described the first diode.
Preferably, the described reversed polarity alarming circuit for photovoltaic DC-to-AC converter also comprises electric capacity; The first end of described electric capacity connects the negative pole of anodal and described the 3rd diode of the first end of the second end of described current limliting electronic circuit, described hummer, described voltage stabilizing electronic circuit; The second end of described electric capacity connects the second end of described hummer, the positive pole of anodal and described the 3rd diode of the negative pole of described voltage stabilizing electronic circuit, described the first diode.
(3) beneficial effect
Reversed polarity alarming circuit for photovoltaic DC-to-AC converter of the present invention, by hummer is set, the prompting of can sounding when the direct current of photovoltaic DC-to-AC converter is inputted reverse polarity connection, reminds workmen to correct a mistake in time, has reduced the situation of doing over again, and has improved operating efficiency; Described warning circuit is simple and reliable, with low cost, and quiescent dissipation is little; By adjusting the resistance value in current limliting electronic circuit, described warning circuit can adapt to the direct current input of different electric pressures, and adaptability is good.
Accompanying drawing explanation
Fig. 1 is the reversed polarity alarming circuit structural drawing for photovoltaic DC-to-AC converter of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
Fig. 1 is the reversed polarity alarming circuit structural drawing for photovoltaic DC-to-AC converter of the present invention.As shown in Figure 1, described warning circuit comprises negative terminals PV-, positive terminals PV+, current limliting electronic circuit, the first diode D1, the second diode D2, the 3rd diode D3, voltage stabilizing electronic circuit, capacitor C 1.
Described current limliting electronic circuit comprises m resistance; Wherein, the first end of the 1st resistance is the first end of described current limliting electronic circuit, and the second end of j-1 resistance connects the first end of j resistance, and the second end of m resistance is the second end of described current limliting electronic circuit, the value of m is more than or equal to the value of 1, j from 2 to m.
Described voltage stabilizing electronic circuit comprises n voltage stabilizing diode, the positive pole of the just very described voltage stabilizing electronic circuit of the 1st voltage stabilizing diode, the negative pole of i-1 voltage stabilizing diode connects the positive pole of i voltage stabilizing diode, the negative pole of n voltage stabilizing diode is the negative pole of described voltage stabilizing electronic circuit, the tube voltage drop sum of a described n voltage stabilizing diode is mated with the operating voltage of described hummer, and the value of i is from 2 to n.
As shown in Figure 1, the value that in the present embodiment, m value is 5, n is 7, and described current limliting electronic circuit comprises resistance R 1～R5, and described voltage stabilizing electronic circuit comprises voltage stabilizing diode D4～D10.
Described negative terminals PV-connects the first end of described resistance R 1, the second end of described resistance R 1 connects the first end of described resistance R 2, the second end of described resistance R 2 connects the first end of described resistance R 3, the second end of described resistance R 3 connects the first end of described resistance R 4, the second end of described resistance R 4 connects the first end of described resistance R 5, the second end of described resistance R 5 connects the positive pole of described the second diode D2, the negative pole of described the second diode D2 connects the first end of described hummer F1, the first end of described capacitor C 1, the positive pole of the negative pole of described the 3rd diode D3 and described voltage stabilizing diode D4, the negative pole of described voltage stabilizing diode D4 connects the positive pole of described voltage stabilizing diode D5, the negative pole of described voltage stabilizing diode D5 connects the positive pole of described voltage stabilizing diode D6, the negative pole of described voltage stabilizing diode D6 connects the positive pole of described voltage stabilizing diode D7, the negative pole of described voltage stabilizing diode D7 connects the positive pole of described voltage stabilizing diode D8, the negative pole of described voltage stabilizing diode D8 connects the positive pole of described voltage stabilizing diode D9, the negative pole of described voltage stabilizing diode D9 connects the positive pole of described voltage stabilizing diode D10, the negative pole of described voltage stabilizing diode D10 connects the second end of described hummer F1, the second end of described capacitor C 1, the positive pole of the positive pole of described the 3rd diode D3 and described the first diode D1, the negative pole of described the first diode D1 connects described positive terminals PV+.
The principle of work of described warning circuit is as follows: when described negative terminals PV-connects DC power cathode, described positive terminals PV+ connects described DC power anode, be that wiring is when correct, described the first diode D1 and the second diode D2 be oppositely cut-off all, described warning circuit open circuit, described hummer F1 does not report to the police; When described negative terminals PV-connects DC power anode, described positive terminals PV+ connects described DC power cathode, while being wiring error, described the first diode D1 and the equal conducting of the second diode D2, the equal conducting of voltage stabilizing diode D4～D10 in described voltage stabilizing electronic circuit, described hummer F1 obtains the operating voltage identical with the tube voltage drop sum of described voltage stabilizing diode D4～D10, sends alerting signal.
Wherein, the tube voltage drop of voltage stabilizing diode D4～D10 that described voltage stabilizing electronic circuit comprises is 0.7V, and the tube voltage drop sum of these 7 voltage stabilizing diodes is 4.9V, approaches the rated voltage 5V of described hummer F1.
The resistance in series sum of resistance R 1～R5 in described current limliting electronic circuit, according to the voltage between described positive terminals PV+ and described and negative terminals PV-, determine, to guarantee in the correct situation of wiring, described the first diode D1 and described the second diode D2 can surprisingly not punctured.
Described the first diode D1 and described the second diode D2 are set simultaneously, and when guaranteeing that a diode is breakdown therein, another one diode still can maintain described warning circuit and normally work.
Described capacitor C 1 is set, can carries out filtering to being connected across the voltage on described hummer F1 both sides, the voltage that makes to be connected across described hummer F1 both sides is more stable, extends the serviceable life of described hummer F1.
Described the 3rd diode D3 is set, at described the first diode D1 and described the second diode D2, all surprisingly punctured in situation guaranteeing, can not make the overtension on described hummer F1 both sides, and described hummer F1 is burnt, improve the safety in utilization of described hummer F1.
The reversed polarity alarming circuit for photovoltaic DC-to-AC converter described in the embodiment of the present invention, by hummer is set, when inputting reverse polarity connection, the direct current of photovoltaic DC-to-AC converter can send alarm, and remind in time workmen to correct a mistake, reduce the situation of doing over again, improved operating efficiency; Described warning circuit is simple and reliable, with low cost, and quiescent dissipation is little; By adjusting the resistance value in current limliting electronic circuit, described warning circuit can adapt to the direct current input of different electric pressures, and adaptability is good.
Above embodiment is only for illustrating the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (3)
1. for a reversed polarity alarming circuit for photovoltaic DC-to-AC converter, it is characterized in that, comprising: positive terminals, negative terminals, current limliting electronic circuit, voltage stabilizing electronic circuit, hummer, the first diode, the second diode, the 3rd diode and electric capacity; Described negative terminals connect the first end of described current limliting electronic circuit, the second end of described current limliting electronic circuit connects the positive pole of described the second diode, the negative pole of described the second diode connects the first end of described hummer, the negative pole of the first end of described electric capacity, described the 3rd diode and the positive pole of described voltage stabilizing electronic circuit, the negative pole of described voltage stabilizing electronic circuit connects the positive pole of anodal and described first diode of the second end of the second end of described hummer, described electric capacity, described the 3rd diode, and the negative pole of described the first diode connects described positive terminals;
Described current limliting electronic circuit comprises 5 resistance; Wherein, the first end of the 1st resistance is the first end of described current limliting electronic circuit, and the second end of j-1 resistance connects the first end of j resistance, and the second end of the 5th resistance is the second end of described current limliting electronic circuit, the value of j from 2 to 5.
2. the reversed polarity alarming circuit for photovoltaic DC-to-AC converter as claimed in claim 1, it is characterized in that, described voltage stabilizing electronic circuit comprises n voltage stabilizing diode, the positive pole of the just very described voltage stabilizing electronic circuit of the 1st voltage stabilizing diode, the negative pole of i-1 voltage stabilizing diode connects the positive pole of i voltage stabilizing diode, the negative pole of n voltage stabilizing diode is the negative pole of described voltage stabilizing electronic circuit, the tube voltage drop sum of a described n voltage stabilizing diode is mated with the operating voltage of described hummer, and the value of i is from 2 to n.
3. the reversed polarity alarming circuit for photovoltaic DC-to-AC converter as claimed in claim 2, is characterized in that, described n value is 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110171185.9A CN102193049B (en) | 2011-06-23 | 2011-06-23 | Alarm circuit for reversed polarity of photovoltaic inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110171185.9A CN102193049B (en) | 2011-06-23 | 2011-06-23 | Alarm circuit for reversed polarity of photovoltaic inverter |
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| CN102193049A CN102193049A (en) | 2011-09-21 |
| CN102193049B true CN102193049B (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110171185.9A Expired - Fee Related CN102193049B (en) | 2011-06-23 | 2011-06-23 | Alarm circuit for reversed polarity of photovoltaic inverter |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012106612A1 (en) * | 2012-07-20 | 2014-05-15 | Sma Solar Technology Ag | DC mispolarization |
| WO2016100474A1 (en) | 2014-12-16 | 2016-06-23 | Abb Technology Ag | Energy panel arrangement power dissipation |
| WO2016123305A1 (en) | 2015-01-28 | 2016-08-04 | Abb Technology Ag | Energy panel arrangement shutdown |
| WO2016134356A1 (en) | 2015-02-22 | 2016-08-25 | Abb Technology Ag | Photovoltaic string reverse polarity detection |
| CN106877815B (en) * | 2015-12-14 | 2019-08-13 | 成都鼎桥通信技术有限公司 | The detection method and device that a kind of photovoltaic group series winding connects |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061288A (en) * | 1990-11-04 | 1992-05-20 | 夏敬释 | Battery switching-on guidance and warning device |
| CN201196666Y (en) * | 2008-04-03 | 2009-02-18 | 张骞宁 | Power supply polarity discriminator |
| CN202166710U (en) * | 2011-06-23 | 2012-03-14 | 北京七星华创弗朗特电子有限公司 | Reversed polarity alarming circuit used for photovoltaic inverter |
-
2011
- 2011-06-23 CN CN201110171185.9A patent/CN102193049B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061288A (en) * | 1990-11-04 | 1992-05-20 | 夏敬释 | Battery switching-on guidance and warning device |
| CN201196666Y (en) * | 2008-04-03 | 2009-02-18 | 张骞宁 | Power supply polarity discriminator |
| CN202166710U (en) * | 2011-06-23 | 2012-03-14 | 北京七星华创弗朗特电子有限公司 | Reversed polarity alarming circuit used for photovoltaic inverter |
Non-Patent Citations (1)
| Title |
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| 潘清明等.智能型电池容量测试仪的研制.《南京工程学院学报（自然科学版）》.2005,第3卷(第2期),56-60. * |
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| CN102193049A (en) | 2011-09-21 |
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Owner name: QIXINGHUACHUANG ELECTRONIC CO., LTD., BEIJING Free format text: FORMER OWNER: BEIJING SENVENSTAR FRONT ELECTRONICS CO., LTD. Effective date: 20141120 |
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Effective date of registration: 20141120 Address after: 100015 Jiuxianqiao Chaoyang District, East Beijing Road, building M2, floor 1, No. 2 Patentee after: Qixinghuachuang Electronic Co., Ltd., Beijing Address before: 100015, No. 1, Jiuxianqiao East Road, Beijing, Chaoyang District, building No. 4, M3 Patentee before: Beijing Senvenstar Front Electronics Co., Ltd. |
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Granted publication date: 20140409 Termination date: 20160623 |