CN104577774A - Photovoltaic metering cabinet - Google Patents
Photovoltaic metering cabinet Download PDFInfo
- Publication number
- CN104577774A CN104577774A CN201510051625.5A CN201510051625A CN104577774A CN 104577774 A CN104577774 A CN 104577774A CN 201510051625 A CN201510051625 A CN 201510051625A CN 104577774 A CN104577774 A CN 104577774A
- Authority
- CN
- China
- Prior art keywords
- photovoltaic
- metering
- cabinet
- current
- ammeter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001681 protective effect Effects 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 2
- 238000010248 power generation Methods 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000013083 solar photovoltaic technology Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/015—Boards, panels, desks; Parts thereof or accessories therefor
- H02B1/04—Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to a photovoltaic metering cabinet used for metering electric energy of photovoltaic power generation. The photovoltaic metering cabinet comprises a cabinet body, the cabinet body comprises a current transformer, a voltage transformer and a metering ammeter, direct-current electric energy emitted by a photovoltaic array outside the cabinet body is transmitted to photovoltaic inverters to be converted into alternating current, the alternating current flows into the current transformer and the voltage transformer in the cabinet body and then is connected into the metering ammeter, the electric energy transmitted to a power grid is metered by the metering ammeter, and the output end of the metering ammeter is connected into the mains supply grid connection side. The photovoltaic metering cabinet has the advantages that the metering ammeter samples and calculates received voltage and current signals and accurately meter electric energy production of the photovoltaic array; with the voltage transformer and the current transformer, the photovoltaic metering cabinet can be applied to photovoltaic power generation equipment with the current value more than 60A and installed capacity more than 50KW; the photovoltaic metering cabinet is simple in overall structure, easy to operate, easy to install and maintain, high in reliability and accurate in metering.
Description
Technical field
The invention belongs to electric energy metrical field, particularly relate to a kind of photovoltaic metering cabinet.
Background technology
along with the development of human industry, worsen in global warming, human ecological environment, conventional energy resource shortage of resources under causing the situation of environmental pollution, the utilization of fossil energy constantly brings the pressure of each side to environment, solar photovoltaic technology generally obtains attention and the support of national governments.Countries in the world accelerate the exploitation to cleaning new energy, and solar energy, because having the clean feature such as harmless, widely distributed, is more and more subject to the favor of people.Photovoltaic also becomes the focus of current distributed new generating.
Along with the news speed development of photovoltaic industry, oneself solar photo-voltaic power generation station has all been loaded onto in increasing resident, enterprise, school, market etc., and the metering of the energy output of photovoltaic just becomes an emphasis difficult problem.Especially National Development and Reform Committee draw up the electrovalence policy determining encouragement photovoltaic generation when, at present, also do not have a set of corresponding system or equipment to detect it.
Summary of the invention
The invention solves problems of the prior art, a kind of photovoltaic metering cabinet is provided, make the metering of photovoltaic generation more accurately and specification, have safety and reliability.
For reaching above-mentioned purpose, technical scheme of the present invention is: a kind of photovoltaic metering cabinet, for photovoltaic generation electric energy metrical, comprise a cabinet, current transformer, voltage transformer and metering ammeter is comprised in described cabinet, the direct current energy that photovoltaic array outside cabinet sends is sent in photovoltaic DC-to-AC converter and is transformed into alternating current, alternating current accesses metering ammeter after flowing into current transformer in described cabinet and voltage transformer, the electricity sending into electrical network is measured, the output access grid-connected side of civil power of affiliated metering ammeter by metering ammeter.
Preferably, described cabinet at least one photovoltaic DC-to-AC converter external, accesses the AC circuit breaker of a protective circuit after the output of each photovoltaic DC-to-AC converter, an access AC circuit breaker and alternating-current lightning arrestor before the input of the grid-connected side of described civil power.
Preferably, described cabinet is provided with 3 transparent observation windows, is respectively metering ammeter observation window, current transformer and voltage transformer observation window, magnitude of voltage and current value observation window.
Preferably, described photovoltaic DC-to-AC converter is 2.
The technical program, its tool has the following advantages: the voltage and current signal received is carried out sampling and calculates by metering ammeter, accurate measurement can go out the energy output of photovoltaic array; Adopt voltage transformer summation current transformer, the photovoltaic power generation equipment making this photovoltaic metering cabinet can be used for current value to be greater than 60A, more than installed capacity 50KW; By arranging observation window, whether staff can observe current electricity generation system and stablize, and judges whether system has fault; AC circuit breaker and alternating-current lightning arrestor are set, improve safety and reliability; Photovoltaic DC-to-AC converter is arranged on the outside of cabinet, make overall structure simple, compact, easy and simple to handle, be easy to installation and maintenance, reliability is high, accurate measurement.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is the electrical schematic diagram of specific embodiments of the invention;
Fig. 2 is the cabinet front view of specific embodiments of the invention;
Fig. 3 is the cabinet rearview of specific embodiments of the invention;
Reference numeral: 1, photovoltaic DC-to-AC converter A; 2, photovoltaic DC-to-AC converter B; 3, AC circuit breaker 1QF; 4, AC circuit breaker 2QF; 5, current transformer; 6, voltage transformer; 7, alternating-current lightning arrestor; 8, special measuring ammeter; 9, AC circuit breaker 3QF; 10, the grid-connected side of civil power; 11, cabinet; 12, current transformer and voltage transformer observation window; 13, metering ammeter observation window; 14, magnitude of voltage and current value observation window.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
A kind of photovoltaic metering cabinet, for photovoltaic generation electric energy metrical, comprise a cabinet, current transformer, voltage transformer and metering ammeter is comprised in described cabinet, the direct current energy that photovoltaic array outside cabinet sends is sent in photovoltaic DC-to-AC converter and is transformed into alternating current, alternating current accesses metering ammeter after flowing into current transformer in described cabinet and voltage transformer, is measured the electric flux sending into electrical network by metering ammeter, the output access grid-connected side of civil power of metering ammeter.
As Figure 1-3, the present embodiment for external 2 photovoltaic DC-to-AC converters of cabinet, and accesses the AC circuit breaker of a protective circuit after the output of each photovoltaic DC-to-AC converter, an access AC circuit breaker and alternating-current lightning arrestor before the input of the grid-connected side of civil power.As shown in Figures 2 and 3, cabinet 11 is provided with 3 transparent observation windows, be respectively metering ammeter observation window 13, current transformer and voltage transformer observation window 12, magnitude of voltage and current value observation window 14, magnitude of voltage and current value observation window 14 are respectively equipped with a voltmeter and 3 ammeters are connected in circuit, for the current voltage measured and three-phase current, facilitate staff to observe, whether understanding system normally works, and whether each equipment is stable.
Its operation principle is: the direct current that photovoltaic array sends is sent in photovoltaic DC-to-AC converter A1 and photovoltaic DC-to-AC converter B2 respectively, alternating current after inversion confluxes respectively through after AC circuit breaker 1QF 3 and AC circuit breaker 2QF 4 by photovoltaic DC-to-AC converter A1 and photovoltaic DC-to-AC converter B2, and access in current transformer 5 and voltage transformer 6, voltage transformer 6 summation current transformer 5 can measure current voltage and three-phase current respectively, carries out energy output metering by voltage transformer 6 alternating current out in the metering ammeter 8 that power supply administration is special; The grid-connected side 10 of civil power is incorporated to through AC circuit breaker 3QF9 by metering ammeter 8 electric current out.The current voltage that mutual inductor measuring measures and three-phase electricity flow valuve, can observe from magnitude of voltage and current value observation window 14 and obtain.Connect an alternating-current lightning arrestor 7 at the ac output end of voltage transformer 6, lightning surge attack can be exempted from by proterctive equipment.
Although specifically show in conjunction with preferred embodiment and describe the present invention; but those skilled in the art should be understood that; not departing from the spirit and scope of the present invention that appended claims limits; in the form and details the present invention is made a variety of changes, be protection scope of the present invention.
Claims (4)
1. a photovoltaic metering cabinet, for photovoltaic generation electric energy metrical, it is characterized in that, comprise a cabinet, comprise current transformer, voltage transformer and metering ammeter in described cabinet, direct current energy that the photovoltaic array outside cabinet sends is sent in photovoltaic DC-to-AC converter and is transformed into alternating current, and alternating current accesses metering ammeter after flowing into current transformer in described cabinet and voltage transformer, the electric flux sending into electrical network is measured, the output access grid-connected side of civil power of affiliated metering ammeter by metering ammeter.
2. a kind of photovoltaic metering cabinet as claimed in claim 1; it is characterized in that; described cabinet at least one photovoltaic DC-to-AC converter external; the AC circuit breaker of a protective circuit is accessed, an access AC circuit breaker and alternating-current lightning arrestor before the input of the grid-connected side of described civil power after the output of each photovoltaic DC-to-AC converter.
3. a kind of photovoltaic metering cabinet as claimed in claim 1, is characterized in that, described cabinet is provided with 3 transparent observation windows, is respectively metering ammeter observation window, current transformer and voltage transformer observation window, magnitude of voltage and current value observation window.
4. a kind of photovoltaic metering cabinet as claimed in claim 2, is characterized in that, described photovoltaic DC-to-AC converter is 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510051625.5A CN104577774A (en) | 2015-02-02 | 2015-02-02 | Photovoltaic metering cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510051625.5A CN104577774A (en) | 2015-02-02 | 2015-02-02 | Photovoltaic metering cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104577774A true CN104577774A (en) | 2015-04-29 |
Family
ID=53093258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510051625.5A Pending CN104577774A (en) | 2015-02-02 | 2015-02-02 | Photovoltaic metering cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104577774A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001211659A (en) * | 2000-01-27 | 2001-08-03 | Sanyo Electric Co Ltd | System interconnection inverter |
| CN202330487U (en) * | 2011-09-07 | 2012-07-11 | 上海英孚特电子技术有限公司 | Intelligent ammeter applied to solar distributed grid-connected system |
| CN202550532U (en) * | 2012-01-12 | 2012-11-21 | 天津市电力公司 | Intelligent microgrid power supply system |
| CN203632339U (en) * | 2013-11-22 | 2014-06-04 | 西安中科麦特电子技术设备有限公司 | Residential solar photovoltaic power supply device |
| CN104025444A (en) * | 2012-01-06 | 2014-09-03 | 株式会社日立产机系统 | System linking device |
| CN204349260U (en) * | 2015-02-02 | 2015-05-20 | 厦门市东港智能科技有限公司 | A kind of photovoltaic metering cabinet |
-
2015
- 2015-02-02 CN CN201510051625.5A patent/CN104577774A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001211659A (en) * | 2000-01-27 | 2001-08-03 | Sanyo Electric Co Ltd | System interconnection inverter |
| CN202330487U (en) * | 2011-09-07 | 2012-07-11 | 上海英孚特电子技术有限公司 | Intelligent ammeter applied to solar distributed grid-connected system |
| CN104025444A (en) * | 2012-01-06 | 2014-09-03 | 株式会社日立产机系统 | System linking device |
| CN202550532U (en) * | 2012-01-12 | 2012-11-21 | 天津市电力公司 | Intelligent microgrid power supply system |
| CN203632339U (en) * | 2013-11-22 | 2014-06-04 | 西安中科麦特电子技术设备有限公司 | Residential solar photovoltaic power supply device |
| CN204349260U (en) * | 2015-02-02 | 2015-05-20 | 厦门市东港智能科技有限公司 | A kind of photovoltaic metering cabinet |
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Application publication date: 20150429 |
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