CN202798448U - Output electro magnetic compatibility circuit of photovoltaic grid-connected inverter - Google Patents
Output electro magnetic compatibility circuit of photovoltaic grid-connected inverter Download PDFInfo
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- CN202798448U CN202798448U CN201220467256.XU CN201220467256U CN202798448U CN 202798448 U CN202798448 U CN 202798448U CN 201220467256 U CN201220467256 U CN 201220467256U CN 202798448 U CN202798448 U CN 202798448U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The utility model discloses an output electro magnetic compatibility circuit of a photovoltaic grid-connected inverter. The output electro magnetic compatibility circuit of the photovoltaic grid-connected inverter comprise a first filter inductor L1 and a second filter inductor L2 which are mutually connected in series, and further comprises a differential-mode capacitor C1, a first common-mode capacitor C2, a second common-mode capacitor C3, a third common-mode capacitor C4 and a fourth common-mode capacitor C5. The differential-mode capacitor C1 is connected with an output end of the second filter inductor L2 and in parallel connection with a power grid input end, the first common-mode capacitor C2 is in series connection with the second common-mode capacitor C3 and in parallel connection with the power grid input end, the third common-mode capacitor C4 is in series connection with the fourth common-mode capacitor C5 and in parallel connection with the power grid input end, a public end of the first common-mode capacitor C2 and the second common-mode capacitor C3 is connected with the ground, and a public end of the third common-mode capacitor C4 and the fourth common-mode capacitor C5 is connected with the ground. The output electro magnetic compatibility circuit of the photovoltaic grid-connected inverter adopts the filter inductors to remove interference of common-mode electromagnetism; besides, the combination of the differential-mode capacitor and the common-mode capacitors can filter interference of wide-frequency high frequency.
Description
Technical field
The utility model relates to a kind of EMC circuit, relates in particular to a kind of output EMC circuit of photovoltaic combining inverter.
Background technology
Photovoltaic DC-to-AC converter is one of key equipment of parallel network power generation, has used a large amount of power electronic device in photovoltaic DC-to-AC converter inside, makes outstanding the displaying of emc issue of system, has affected the quality of power supply.And because domestic energy scarcity develops renewable new forms of energy, improve the strategic measure that the quality of power supply has become China's energy development.In recent years, because developed country's policy is encouraged the development of new forms of energy, the extensive use that developed country is solar grid-connected; Because the high-frequency switch of the switching tube of the switching tube that boosts of photovoltaic DC-to-AC converter and Converting Unit disturbs so that contain a large amount of high order harmonic components in the alternating current of output, severe contamination electrical network, directly affected the quality of power supply of electrical network.
Existing EMC problem for the 1-5KW photovoltaic combining inverter, the situation that it mainly exists conducted interference and low frequency radiation to disturb, product all needs the relevant EMC test by TUV when dispatching from the factory, to satisfy the EN61000-6-3:2007 of EMC; The requirement of EN61000-6-1:2007 standard, what use in design process at existing EMC circuit is expensive amorphous common mode inductance, larger lifting cost.Therefore particularly important to the design of the output EMC circuit of photovoltaic combining inverter.
The utility model content
The technical problems to be solved in the utility model provides a kind of output EMC circuit that reduces the photovoltaic combining inverter of high order harmonic component interference.
The purpose of this utility model is achieved through the following technical solutions:
A kind of output EMC circuit of photovoltaic combining inverter, comprise the first filter inductance L1 and the second filter inductance L2 that are connected in series, also comprise differential mode capacitor C1, the first common mode capacitance C2, the second common mode capacitance C3, the 3rd common mode capacitance C4 and the 4th common mode capacitance C5, described differential mode capacitor C1 is connected with the output of the second filter inductance L2, and be connected in parallel with the electrical network input, described the first common mode capacitance C2 and the second common mode capacitance C3 are connected in series, and be connected in parallel with the electrical network input, described the 3rd common mode capacitance C4 and the 4th common mode capacitance C5 are connected in series, and be connected in parallel with the electrical network input, the common end grounding of described the first common mode capacitance C2 and the second common mode capacitance C3, the common end grounding of described the 3rd common mode capacitance C4 and the 4th common mode capacitance C5.
Below further preferred version of the present utility model is described:
The output EMC circuit of above-mentioned photovoltaic combining inverter, wherein: described the first filter inductance L1 is the FERRITE CORE inductance, and inductance value is 10mH.
The output EMC circuit of above-mentioned photovoltaic combining inverter, wherein: and the second filter inductance L2 is the FERRITE CORE inductance, inductance value is 5mH.
The output EMC circuit of above-mentioned photovoltaic combining inverter, wherein: the capacitance of described the first common mode capacitance C2 and the second common mode capacitance C3 is respectively 10 times of capacitance of the 3rd common mode capacitance C4 and the 4th common mode capacitance C5.
The output EMC circuit of above-mentioned photovoltaic combining inverter, wherein: the capacitance of described the first common mode capacitance C2 and the second common mode capacitance C3 is and is 47nF, and the capacitance of described the 3rd common mode capacitance C4 and the 4th common mode capacitance C5 is 4.7nF.
The utlity model has following beneficial effect:
Adopt filter inductance, remove the common mode electromagnetic interference; Adopt in addition differential mode capacitor and common mode capacitance in conjunction with can filtering the High-frequency Interference of broadband very.
Description of drawings
In order to be easy to explanation, the utility model is done to describe in detail by following preferred embodiment and accompanying drawing.
Fig. 1 is the circuit diagram of output EMC circuit of the present utility model.
Embodiment
Referring to shown in Figure 1, the utility model provides a kind of output EMC circuit of photovoltaic combining inverter, comprise the first filter inductance L1 and the second filter inductance L2 that are connected in series, also comprise differential mode capacitor C1, the first common mode capacitance C2, the second common mode capacitance C3, the 3rd common mode capacitance C4 and the 4th common mode capacitance C5, described differential mode capacitor C1 is connected with the output of the second filter inductance L2, and be connected in parallel with the electrical network input, described the first common mode capacitance C2 and the second common mode capacitance C3 are connected in series, and be connected in parallel with the electrical network input, described the 3rd common mode capacitance C4 and the 4th common mode capacitance C5 are connected in series, and be connected in parallel with the electrical network input, the common end grounding of described the first common mode capacitance C2 and the second common mode capacitance C3, the common end grounding of described the 3rd common mode capacitance C4 and the 4th common mode capacitance C5.
Wherein, described the first filter inductance L1 is the FERRITE CORE inductance, and inductance value is 10mH, near can successful filtering 0.15M-0.5M common mode electromagnetic interference, the second filter inductance L2 is the FERRITE CORE inductance, and inductance value is 5mH, near the common mode disturbances can successful filtering 0.3M-1M; The capacitance of described the first common mode capacitance C2 and the second common mode capacitance C3 is respectively 10 times of capacitance of the 3rd common mode capacitance C4 and the 4th common mode capacitance C5, concrete, the capacitance of described the first common mode capacitance C2 and the second common mode capacitance C3 is and is 47nF, the capacitance of described the 3rd common mode capacitance C4 and the 4th common mode capacitance C5 is 4.7nF, like this can successful filtering the High-frequency Interference of broadband very, such as the compacting of all succeeding of: the electromagnetic interference that 5M, 10M, 20M frequency exceed standard.
After adopting above-mentioned design, so that of the present utility model simple and practical, cost is very low, have the value of very high batch production, and through behind this circuit filtering, the electromagnetic interference of the AC alternating current of output is very low, and satisfying EN61000-6-2:2005, EN61000-6-3:2007 standard and EN 55022 CLASS B standards, it is GB/T 17799.2, GB 17799-3, GB 9254-2008 that these standards are equal to corresponding national standard.
The embodiment of the above is preferred embodiments of the present utility model, is not to limit implementation scope of the present utility model with this, and scope of the present utility model comprises and is not limited to this embodiment.The equivalence variation that all shapes according to the utility model, structure are done all comprises in the protection range of the present utility model.
Claims (5)
1. the output EMC circuit of a photovoltaic combining inverter, comprise the first filter inductance (L1) and the second filter inductance (L2) that are connected in series, it is characterized in that: also comprise differential mode capacitor (C1), the first common mode capacitance (C2), the second common mode capacitance (C3), the 3rd common mode capacitance (C4) and the 4th common mode capacitance (C5), described differential mode capacitor (C1) is connected with the output of the second filter inductance (L2), and be connected in parallel with the electrical network input, described the first common mode capacitance (C2) is connected in series with the second common mode capacitance (C3), and be connected in parallel with the electrical network input, described the 3rd common mode capacitance (C4) is connected in series with the 4th common mode capacitance (C5), and be connected in parallel with the electrical network input, the common end grounding of described the first common mode capacitance (C2) and the second common mode capacitance (C3), the common end grounding of described the 3rd common mode capacitance (C4) and the 4th common mode capacitance (C5).
2. the output EMC circuit of photovoltaic combining inverter according to claim 1, it is characterized in that: described the first filter inductance (L1) is the FERRITE CORE inductance, and inductance value is 10mH.
3. the output EMC circuit of photovoltaic combining inverter according to claim 1 is characterized in that: and the second filter inductance (L2) is the FERRITE CORE inductance, and inductance value is 5mH.
4. it is characterized in that according to claim 1 and 2 or the output EMC circuit of 3 described photovoltaic combining inverters: the capacitance of described the first common mode capacitance (C2) and the second common mode capacitance (C3) is respectively 10 times of capacitance of the 3rd common mode capacitance (C4) and the 4th common mode capacitance (C5).
5. the output EMC circuit of photovoltaic combining inverter according to claim 4, it is characterized in that: the capacitance of described the first common mode capacitance (C2) and the second common mode capacitance (C3) is and is 47nF, and the capacitance of described the 3rd common mode capacitance (C4) and the 4th common mode capacitance (C5) is 4.7nF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220467256.XU CN202798448U (en) | 2012-09-13 | 2012-09-13 | Output electro magnetic compatibility circuit of photovoltaic grid-connected inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220467256.XU CN202798448U (en) | 2012-09-13 | 2012-09-13 | Output electro magnetic compatibility circuit of photovoltaic grid-connected inverter |
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| Publication Number | Publication Date |
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| CN202798448U true CN202798448U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201220467256.XU Expired - Lifetime CN202798448U (en) | 2012-09-13 | 2012-09-13 | Output electro magnetic compatibility circuit of photovoltaic grid-connected inverter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638903A (en) * | 2013-11-08 | 2015-05-20 | 海尔集团公司 | Washing machine and interference suppression module thereof |
| CN105099165A (en) * | 2014-05-19 | 2015-11-25 | 北京东土科技股份有限公司 | EMC protection and filtering device and method of high voltage power supply |
| CN109861509A (en) * | 2018-12-07 | 2019-06-07 | 天津津航计算技术研究所 | A kind of electric source filter circuit inhibiting aeronautical data loading device electromagnetic interference |
-
2012
- 2012-09-13 CN CN201220467256.XU patent/CN202798448U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638903A (en) * | 2013-11-08 | 2015-05-20 | 海尔集团公司 | Washing machine and interference suppression module thereof |
| CN105099165A (en) * | 2014-05-19 | 2015-11-25 | 北京东土科技股份有限公司 | EMC protection and filtering device and method of high voltage power supply |
| CN105099165B (en) * | 2014-05-19 | 2017-12-19 | 北京东土科技股份有限公司 | A kind of EMC protection of high voltage power supply and filter and method |
| CN109861509A (en) * | 2018-12-07 | 2019-06-07 | 天津津航计算技术研究所 | A kind of electric source filter circuit inhibiting aeronautical data loading device electromagnetic interference |
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| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 510663 No. 17 Xiangshan Road, Science Town, Guangzhou hi tech Industrial Development Zone, Guangdong, China Patentee after: GUANGZHOU SANJING ELECTRIC Co.,Ltd. Address before: 510663 No. 17 Xiangshan Road, Science Town, Guangzhou hi tech Industrial Development Zone, Guangdong, China Patentee before: GUANGZHOU SANJING ELECTRIC Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
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| CX01 | Expiry of patent term |