CN204668964U - A kind of photovoltaic inversion is boosted integrated generating main circuit topological structure - Google Patents

A kind of photovoltaic inversion is boosted integrated generating main circuit topological structure Download PDF

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Publication number
CN204668964U
CN204668964U CN201520235132.2U CN201520235132U CN204668964U CN 204668964 U CN204668964 U CN 204668964U CN 201520235132 U CN201520235132 U CN 201520235132U CN 204668964 U CN204668964 U CN 204668964U
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China
Prior art keywords
dc
inverter
cabinet
integrated
described
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CN201520235132.2U
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Chinese (zh)
Inventor
王建军
吕崇
陈守信
于虹
李迪艺
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广东明阳龙源电力电子有限公司
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/60Planning or developing urban green infrastructure
    • Y02A30/62Integration of district energy or distributed or on-site energy generation, e.g. combined heat and power generation or solar energy, in city layout
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion electric or electronic aspects
    • Y02E10/563Power conversion electric or electronic aspects for grid-connected applications

Abstract

The utility model discloses a kind of photovoltaic inversion to boost integrated generating main circuit topological structure, comprise the DC cabinet, inverter, the middle pressure case change system that are electrically connected successively, this DC cabinet input is for connecting the DC output end of photovoltaic array after header box confluxes, middle pressure case becomes the output of system for accessing medium voltage network, and described DC cabinet, inverter, middle pressure case become the system integration and be integrated.DC cabinet, inverter and boosting case are become integrated after, in the system integration, environmental adaptation, overall input cost, Installation and Debugging are quick etc., have significant advantage.

Description

A kind of photovoltaic inversion is boosted integrated generating main circuit topological structure

Technical field

The utility model relates to large-sized photovoltaic power transformation, and especially a kind of photovoltaic inversion is boosted integrated generating main circuit topological structure.

Background technology

Present large-sized photovoltaic power station Converting Unit is substantially all be a unit according to 1MW, comprises outdoor 7-8 platform header box, 2 DC cabinets of inversion room and 2 inverters, and the boosting case of outdoor grid side becomes composition.This design is in construction, and floor space is comparatively large, and construction cost is high, long construction period; In equipment application aspect, reuse partial electric device, and AC low-tension side uses a large amount of cable to connect, cause device application waste and loss is higher.

Summary of the invention

For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of photovoltaic inversion and boosts integrated generating main circuit topological structure.

The technical solution adopted in the utility model is:

A kind of photovoltaic inversion is boosted integrated generating main circuit topological structure, comprise the DC cabinet, inverter, the middle pressure case change system that are electrically connected successively, this DC cabinet input is for connecting the DC output end of photovoltaic array after header box confluxes, middle pressure case becomes the output of system for accessing medium voltage network, and described DC cabinet, inverter, middle pressure case become the system integration and be integrated.

Further, the DC side of described DC cabinet and inverter is integrated; Described middle pressure case becomes system and comprises the low-voltage cabinet, transformer, the high-voltage board that connect successively, and the AC of this low-voltage cabinet and inverter is integrated.

Further, described DC cabinet comprises the DC circuit breaker, direct current electromagnetic interface filter assembly, the DC support electric capacity that connect successively, the AC of described inverter comprises the LC filter, interchange main contactor, the interchange electromagnetic interface filter assembly that connect successively, is three phase full bridge IGBT inverter circuit between this DC side and AC.

Further, direct current arrester is connected with between the DC circuit breaker output of described DC cabinet and direct current electromagnetic interface filter component inputs, be connected with alternating-current lightning arrestor between described interchange electromagnetic interface filter assembly output and low-voltage cabinet input, between described high-voltage board output and electrical network, be connected with alternating-current lightning arrestor.

The beneficial effects of the utility model:

1: direct current inputs, after inversion, boosting, medium voltage network exports;

2: integrated DC distribution, inversion, middle pressure transformer, high-voltage board and system monitoring function;

3: DC power distribution cabinet and inverter direct current input side integrated, to become low-voltage cabinet integrated for inversion AC and boosting case, fault point minimizing;

4: optimize integrated AC and DC circuit breaker, reduction of income overlapping investment;

5: reduce cable investment, without the need to excavating cable trough, foundation of civil work once completes;

6: integral hoisting, job site is quick and easy for installation, shortens power station construction period;

7: copper bar design replaces cabled manner, and loss is lower, and overload capacity is stronger;

8: case step-down pressure chamber shares cooling system, and working temperature is lower, and the life-span is longer;

9: unified Installation and Debugging in factory, equipment compatibility is higher;

10: consider the requirement such as air discharging and radiating, sand-proof, rain and snow, anticorrosion, anti-low temperature comprehensively.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.

Fig. 1 is theory diagram of the present utility model;

Fig. 2 is the integrated physical circuit figure of DC cabinet and inverter;

Fig. 3 is the physical circuit figure that middle pressure case becomes system.

Embodiment

Be illustrated in figure 1 a kind of photovoltaic inversion of the present utility model to boost integrated generating main circuit topological structure, comprise the DC cabinet, inverter, the middle pressure case change system that are electrically connected successively, this DC cabinet input is for connecting the DC output end of photovoltaic array after header box confluxes, middle pressure case becomes the output of system for accessing medium voltage network, and described DC cabinet, inverter, middle pressure case become the system integration and be integrated.

Concrete, as Fig. 2, the DC side of described DC cabinet and inverter is integrated; Described middle pressure case becomes system and comprises the low-voltage cabinet, transformer, the high-voltage board that connect successively, and the AC of this low-voltage cabinet and inverter is integrated.Wherein, described DC cabinet comprises the DC circuit breaker (Q1 ~ Q8), direct current electromagnetic interface filter assembly (EMI1), the DC support electric capacity that connect successively, the AC of described inverter comprise connect successively LC filter, exchange main contactor (KM1), exchange electromagnetic interface filter assembly (EMI2), be three phase full bridge IGBT inverter circuit between this DC side and AC.

In addition, the technical program has also made improvement to lightning protection, direct current arrester (FV1) is connected with between the DC circuit breaker output and direct current electromagnetic interface filter component inputs of DC cabinet, be connected with alternating-current lightning arrestor between described interchange electromagnetic interface filter assembly output and low-voltage cabinet input, between described high-voltage board output and electrical network, be connected with alternating-current lightning arrestor.

Wherein, the function of above-mentioned concrete parts is as follows:

DC circuit breaker realizes the break-make of photovoltaic DC output and main power circuit;

Described direct current electromagnetic interface filter assembly realizes low-pass filtering, eliminates direct current medium-high frequency interference signal, and realizes the protection to DC distribution end;

Described DC support electric capacity is used for absorbing the ripple current from DC side and inverter side;

Described three phase full bridge IGBT inverter circuit realizes direct current and the conversion exchanged;

Described LC filter is used for eliminating AC harmonic;

Described interchange main contactor is connected in normal state, and failure condition disconnects, and realizes defencive function;

High-frequency interferencing signal eliminated by described interchange electromagnetic interface filter assembly;

Described case become low-voltage cabinet realize inverter and case become in the break-make of pressure transformer;

Described middle pressure transformer realizes grid-connected voltage and becomes middle pressure from low pressure;

Described high-voltage board realizes the break-make with electrical network;

In described direct current arrester and alternating-current lightning arrestor protective circuit, equipment endangers from instantaneous overvoltage, can block afterflow again, unlikelyly causes system earth short circuit.

The course of work of the present utility model is as follows: the direct current that photovoltaic array transforms is input to direct current electromagnetic interface filter assembly by DC circuit breaker after header box confluxes, direct current is sent to three phase full bridge IGBT inverter circuit by DC support capacitive absorption ripple current after the low-pass filtering of direct current electromagnetic interface filter assembly, by systematic sampling DC voltage, electric current, AC voltage, electric current (utilizing current sensor TF1-TF4), the driving of three phase full bridge IGBT inverter circuit is completed by peripheral control unit, then the alternating current exported by three phase full bridge IGBT inverter circuit obtains with electrical network with alternating current frequently through LC filter harmonic carcellation, and after eliminating High-frequency Interference by interchange electromagnetic interface filter assembly, the AC circuit breaker being become low-voltage cabinet by the case of integrated inverse device AC is input to voltage rise pressure transformer in case change, then press grid-connected in realizing.

Figure 3 shows that middle pressure case becomes system, low-voltage cabinet is arranged in inverter collection dress, and with inverter and cabinet, case becomes and the public container framework of inverter container, auxiliary transformer total capacity 25KVA, and every 10 sun tracking system square formations are powered corresponding 1 road branch switch.

The foregoing is only preferred embodiments of the present utility model, the utility model is not limited to above-mentioned execution mode, as long as the technical scheme realizing the utility model object with basic same approach all belongs within protection range of the present utility model.

Claims (4)

1. a photovoltaic inversion is boosted integrated generating main circuit topological structure, comprise the DC cabinet, inverter, the middle pressure case change system that are electrically connected successively, this DC cabinet input is for connecting the DC output end of photovoltaic array after header box confluxes, middle pressure case becomes the output of system for accessing medium voltage network, it is characterized in that: described DC cabinet, inverter, middle pressure case become the system integration and be integrated.
2. a kind of photovoltaic inversion according to claim 1 is boosted integrated generating main circuit topological structure, it is characterized in that: the DC side of described DC cabinet and inverter is integrated; Described middle pressure case becomes system and comprises the low-voltage cabinet, transformer, the high-voltage board that connect successively, and the AC of this low-voltage cabinet and inverter is integrated.
3. a kind of photovoltaic inversion according to claim 2 is boosted integrated generating main circuit topological structure, it is characterized in that: described DC cabinet comprises the DC circuit breaker, direct current electromagnetic interface filter assembly, the DC support electric capacity that connect successively, the AC of described inverter comprises the LC filter, interchange main contactor, the interchange electromagnetic interface filter assembly that connect successively, is three phase full bridge IGBT inverter circuit between this DC side and AC.
4. a kind of photovoltaic inversion according to claim 3 is boosted integrated generating main circuit topological structure, it is characterized in that: between the DC circuit breaker output of described DC cabinet and direct current electromagnetic interface filter component inputs, be connected with direct current arrester, be connected with alternating-current lightning arrestor between described interchange electromagnetic interface filter assembly output and low-voltage cabinet input, between described high-voltage board output and electrical network, be connected with alternating-current lightning arrestor.
CN201520235132.2U 2015-04-17 2015-04-17 A kind of photovoltaic inversion is boosted integrated generating main circuit topological structure CN204668964U (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106230029A (en) * 2016-09-12 2016-12-14 深圳市长昊机电有限公司 A kind of photovoltaic generation unit
CN106300432A (en) * 2016-11-08 2017-01-04 中国东方电气集团有限公司 A kind of Modular photovoltaic combining inverter of integrated DC distribution
CN106385052A (en) * 2016-11-03 2017-02-08 中民新能投资有限公司 Photovoltaic inverter system
CN106411248A (en) * 2016-11-03 2017-02-15 中民新能投资有限公司 Photovoltaic power generation system and control method thereof
CN106505946A (en) * 2016-11-03 2017-03-15 中民新能投资有限公司 A kind of photovoltaic generating system and its control method
CN106655254A (en) * 2016-11-03 2017-05-10 中民新能投资集团有限公司 Integrated device of inverter and transformer
CN109378756A (en) * 2018-11-30 2019-02-22 南通星宇电气有限公司 A kind of photovoltaic power generation boosting integrated machine for reverse conversion
CN109546561A (en) * 2018-11-30 2019-03-29 南通星宇电气有限公司 A kind of wind power generation boosting inversion pillar all-in-one machine

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106230029A (en) * 2016-09-12 2016-12-14 深圳市长昊机电有限公司 A kind of photovoltaic generation unit
CN106230029B (en) * 2016-09-12 2019-10-15 深圳市长昊机电有限公司 A kind of photovoltaic generation unit
CN106385052A (en) * 2016-11-03 2017-02-08 中民新能投资有限公司 Photovoltaic inverter system
CN106411248A (en) * 2016-11-03 2017-02-15 中民新能投资有限公司 Photovoltaic power generation system and control method thereof
CN106655254A (en) * 2016-11-03 2017-05-10 中民新能投资集团有限公司 Integrated device of inverter and transformer
CN106385052B (en) * 2016-11-03 2018-11-16 中民新能投资集团有限公司 A kind of photovoltaic inverting system
CN106655254B (en) * 2016-11-03 2019-04-09 中民新能投资集团有限公司 A kind of inverter and transformer integrated equipment
CN106505946A (en) * 2016-11-03 2017-03-15 中民新能投资有限公司 A kind of photovoltaic generating system and its control method
CN106300432A (en) * 2016-11-08 2017-01-04 中国东方电气集团有限公司 A kind of Modular photovoltaic combining inverter of integrated DC distribution
CN109378756A (en) * 2018-11-30 2019-02-22 南通星宇电气有限公司 A kind of photovoltaic power generation boosting integrated machine for reverse conversion
CN109546561A (en) * 2018-11-30 2019-03-29 南通星宇电气有限公司 A kind of wind power generation boosting inversion pillar all-in-one machine

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