CN105071439B - Photovoltaic inversion single phase ac grid connection box - Google Patents

Photovoltaic inversion single phase ac grid connection box Download PDF

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Publication number
CN105071439B
CN105071439B CN201510498625.XA CN201510498625A CN105071439B CN 105071439 B CN105071439 B CN 105071439B CN 201510498625 A CN201510498625 A CN 201510498625A CN 105071439 B CN105071439 B CN 105071439B
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China
Prior art keywords
grid
breaker
lightning protection
relay
control
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CN201510498625.XA
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Chinese (zh)
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CN105071439A (en
Inventor
李雷波
靳伟
赵强
郝玉峰
高志忠
郭云山
张忠英
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State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Xingtai Power Supply Co of State Grid Hebei Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Xingtai Power Supply Co of State Grid Hebei Electric Power Co Ltd
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Application filed by State Grid Corp of China SGCC, State Grid Hebei Electric Power Co Ltd, Xingtai Power Supply Co of State Grid Hebei Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201510498625.XA priority Critical patent/CN105071439B/en
Publication of CN105071439A publication Critical patent/CN105071439A/en
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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
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/10Photovoltaic [PV]
    • 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 systems, e.g. maximum power point trackers

Abstract

The invention discloses a kind of photovoltaic inversion single phase ac grid connection box, it is related to interconnection technology field.Including:Direct current collector-shoe gear, inverter are connected with grid-connecting apparatus, direct current collector-shoe gear leading-out terminal is exchanged with inverter end of incoming cables, and inverter leading-out terminal is connected with exchanging grid-connecting apparatus end of incoming cables;Exchange grid-connecting apparatus includes:Inversion AC input cell, grid-connected load output unit, deficient no-voltage trip inspection have pressing lock unit and lightning protection unit;Owing no-voltage trip inspection has deficient decompression tripping operation control, time control, tripping operation control, shutting-brake control and relay and control in pressing lock unit all parallel with one another;Inversion AC input cell installs disconnecting switch, and disconnecting switch leading-out terminal is connected with the first breaker DL of grid-connected load output unit end of incoming cables;Owing no-voltage trip inspection has pressing lock unit connection end and the leading-out terminal of grid-connected load output unit to be connected;Lightning protection unit is connected in parallel between disconnecting switch and the first breaker DL.Simple in construction, grid connection efficiency is high, and cabling is regular, has time-lag action, short trouble occurs and do not result in momentary power failure, can continue to generate electricity in the short time, have protective effect to household electrical appliances etc., it is to avoid property loss.

Description

Photovoltaic inversion single phase ac grid connection box
Technical field
The present invention relates to interconnection technology field, a kind of photovoltaic inversion single phase ac grid connection box is particularly related to.
Background technology
Photovoltaic is the abbreviation of solar photovoltaic generation system, is a kind of photovoltaic effect of utilization solar cell semi-conducting material Should, solar radiation can be converted directly into a kind of new power generating system of electric energy, have independent operating and the two kinds of sides that are incorporated into the power networks Formula.The grid-connected transmission line of electricity for referring to generating set is connected with power transmission network starts outwards transmission of electricity.Conventional domestic grid connection box, each part point Dissipate and install, cabling is irregular, complicated inconvenience is installed.And conventional domestic grid connection box does not have time-delay mechanism, when circuit occurs in short-term It can immediately be powered off during failure, household electrical appliances etc. are damaged, caused any property loss.
The content of the invention
The technical problem to be solved in the present invention is that there is provided a kind of photovoltaic inversion blow-up for above-mentioned the deficiencies in the prior art Grid connection box is flowed, simple in construction, grid connection efficiency is high, safe and reliable, and grid connection box sets time relay sj, there is time-lag action, occurs Short trouble does not result in momentary power failure, can continue electricity consumption in the short time, have protective effect to household electrical appliances etc., it is to avoid property damage Lose.
In order to solve the above technical problems, the technical solution used in the present invention is:Including:Direct current collector-shoe gear, inversion dress Put and exchange grid-connecting apparatus, direct current collector-shoe gear leading-out terminal is connected with inverter end of incoming cables, and inverter leading-out terminal is with exchanging Grid-connecting apparatus end of incoming cables is connected;Exchange grid-connecting apparatus includes:Inversion AC input cell, grid-connected load output unit, deficient decompression Dropout inspection has pressing lock unit and lightning protection unit;Owe no-voltage trip inspection have pressing lock unit in owe decompression tripping operation control, when Between control, tripping operation control, shutting-brake control and relay and control it is all parallel with one another;Inversion AC input cell installs disconnecting switch, every Connected from switch wire outlet terminal with the first breaker DL of grid-connected load output unit end of incoming cables;Owing no-voltage trip inspection has pressing lock Unit connection end is connected with the leading-out terminal of grid-connected load output unit;Lightning protection unit is connected in parallel on disconnecting switch and the first open circuit Between device DL.
Preferably, time control and tripping operation control intermediate relay ZJ normally-closed contact left end are connected with power network live wire L, it is right End is connected with time relay sj and breaking coil TQ respectively, time relay sj and the breaking coil TQ other ends all with power network zero Line N is connected.
Preferably, time relay sj timing closing switch contact in shutting-brake control, left end is connected with power network live wire L, Right-hand member is connected with closing coil HQ, and the closing coil HQ other ends are connected with power network zero line N.
Preferably, in relay and control the second breaker DL switch contacts and intermediate relay ZJ switch contact left end all with Power network live wire L ends are connected, and right-hand member is all connected with intermediate relay ZJ, and the intermediate relay ZJ other end is connected with power network zero line N.
Preferably, lightning protection unit is composed in series by the second breaker DL and lightning protection device SPD, lightning protection device SPD is another End ground connection.
Preferably, the first breaker DL is exchange breaker of plastic casing.
Preferably, lightning protection device SPD selects DS42-230/G/2P.
Preferably, the first breaker DL selects CDM1-63L/3330/3P, disconnecting switch selects DZ47-63/C50A/ 2P。
It is using the beneficial effect produced by above-mentioned technical proposal:The present invention, simple in construction, grid connection efficiency is high, passes through Increase grounding-for-lightning device, it is more safe and reliable, while adding deficient no-voltage trip inspection has pressing brake gear, protect grid-connected dress Put, using time relay sj can in momentary power failure still can normal power generation electricity consumption, short time power failure will not make to electrical equipment Into damage, it is to avoid property loss.
Brief description of the drawings
Fig. 1 is the structural representation of one embodiment of the invention;
Fig. 2 is the circuit connection diagram of one embodiment of the invention;
Fig. 3 is the circuit connection diagram of Unit 5 in Fig. 2.
In figure:1st, grid-connecting apparatus is exchanged;2nd, inversion AC input cell;3rd, grid-connected load output unit;4th, lightning protection Unit;5th, owing no-voltage trip inspection has pressing lock unit;6th, disconnecting switch;7th, the first breaker DL;8th, the second breaker DL;9th, prevent Thunder device SPD.
Embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
As shown in Figure 1, Figure 2 and Figure 3, it is a kind of one embodiment of photovoltaic inversion single phase ac grid connection box of the invention, bag Include:Direct current collector-shoe gear, inverter with exchange grid-connecting apparatus 1, direct current collector-shoe gear leading-out terminal and inverter end of incoming cables phase Even, inverter leading-out terminal is connected with exchanging the end of incoming cables of grid-connecting apparatus 1, the direct current that photovoltaic panel is sent, by confluxing into inverse Become device, converting direct-current power into alternating-current power is entered exchange grid-connecting apparatus 1 by inverter.Exchange grid-connecting apparatus 1 includes:Inversion exchange is defeated Entering unit 2, the grid-connected output unit 3, deficient no-voltage trip inspection of loading has pressing lock unit 5 and lightning protection unit 4, simple in construction, Wiring is clear.Owing no-voltage trip inspection has deficient decompression tripping operation control, time control, tripping operation control, shutting-brake control in pressing lock unit 5 All parallel with one another with relay and control, owing no-voltage trip inspection has pressing lock unit to control the first breaker DL7, can be electric at a distance It is dynamic to close, disconnect and detain breaker again, to realize the centralized Control of transmission and distribution networkses and automatically control.Jumped when under-voltage or decompression Lock, protection is by each several part element movement when having high current or big voltage, and protection exchanges grid-connecting apparatus, when momentary power failure, when Between relay SJ power and play a role, household electrical appliances etc. can be played a protective role with delay tripping.Inversion AC input cell 2 is pacified Disconnecting switch 6 is filled, the leading-out terminal of disconnecting switch 6 is connected with the first breaker DL7 of grid-connected load output unit 3 end of incoming cables, every The mainly obvious cut-off point of pass 6 is left, convenient maintenance, the first breaker DL7 can cut off electric current when failure, owe to lose The inspection of pressure-off button has the terminals of pressing lock unit 5 and the leading-out terminal of grid-connected load output unit 3 to be connected, mainly to the first breaker DL7 closure disconnections are controlled.Lightning protection unit 4 is connected in parallel between the breaker DL7 of disconnecting switch 6 and first, lightning protection Device can prevent thunder and lightning, safer.
Time control and tripping operation are controlled, and intermediate relay ZJ normally-closed contact left end is connected with power network live wire L, right-hand member respectively with Time relay sj is connected with breaking coil TQ, and time relay sj and the breaking coil TQ other ends are all connected with power network zero line N. Time relay sj timing closing switch contact in shutting-brake control, left end is connected with power network live wire L, right-hand member and closing coil HQ phases Even, the closing coil HQ other ends are connected with power network zero line N.First breaker DL switch contacts and auxiliary reclay in relay and control ZJ switch contacts left end is all connected with power network live wire L ends, and right-hand member is all connected with intermediate relay ZJ, the intermediate relay ZJ other end It is connected with power network zero line N.First breaker DL switch contacts obtain electric, and intermediate relay ZJ obtains electric work, and intermediate relay ZJ is normal Closed contact disconnects, intermediate relay ZJ switch contact closure, and time relay sj and breaking coil TQ dead electricity do not work, the time after Electrical equipment SJ timing closing switch contacts obtain electric closure, and closing coil HQ obtains electric, shutting-brake control work, the first breaker DL work. Conversely, when being powered off suddenly in circuit, time relay sj obtains electric start-up operation, it is ensured that in instantaneous or short supply interruption, Circuit still can work, and protection electrical equipment is without damage.
Lightning protection unit 4 is composed in series by the second breaker DL8 and lightning protection device SPD9, another terminations of lightning protection device SPD9 Ground, the second breaker D8L plays arc extinguishing effect, and lightning protection device SPD9 selects DS42-230/G/2P, and Anti-surging prevents thunderbolt and interior The harm of portion's overvoltage.
First breaker DL7 is exchange breaker of plastic casing, and the first breaker DL7 selects CDM1-63L/3330/3P, with breaking After road device coordinates, electronic closure, disconnections and breaker can be detained again at a distance, with realize the centralized Controls of transmission and distribution networkses with automatically Control.Disconnecting switch 6 selects DZ47-63/C50A/2P, there is obvious cut-off point, convenient maintenance.
After adopting the above technical scheme, simple in construction, grid connection efficiency is high, rationally distributed, by increasing grounding-for-lightning device, It is more safe and reliable, while adding the inspection of deficient no-voltage trip has pressing brake gear, electronic closure, disconnection and it can detain disconnected again at a distance Road device, to realize the centralized Control of transmission and distribution networkses and automatically control.The setting of time relay sj, can be in momentary power failure Still can normal power generation electricity consumption in the short time, play a part of delay tripping, the short time, which will not have a power failure, avoids that electrical equipment is caused to damage It is bad, it is to avoid property loss.

Claims (5)

1. a kind of photovoltaic inversion single phase ac grid connection box, it includes:Direct current collector-shoe gear, inverter with exchange grid-connecting apparatus (1), direct current collector-shoe gear leading-out terminal is connected with inverter end of incoming cables, and inverter leading-out terminal is with exchanging grid-connecting apparatus(1)Enter Line end is connected;It is characterized in that:Exchange grid-connecting apparatus(1)Including:Inversion AC input cell(2), grid-connected load output unit (3), owe no-voltage trip inspection have pressing lock unit(5)With lightning protection unit(4);The deficient no-voltage trip inspection has pressing lock unit (5)In owe decompression tripping operation control, time control, tripping operation control, shutting-brake control and relay and control it is all parallel with one another;The inversion is handed over Flow input block(2)Disconnecting switch is installed(6), disconnecting switch leading-out terminal and grid-connected load output unit(3)The first breaker DL(7)End of incoming cables series connection;The deficient no-voltage trip inspection has pressing lock unit(5)Terminals and grid-connected load output unit(3) Leading-out terminal be connected;The lightning protection unit(4)It is connected in parallel on disconnecting switch(6)With the first breaker DL(7)Between;
Time control and tripping operation control in, intermediate relay ZJ normally-closed contact left end is connected with power network live wire L, right-hand member respectively with when Between relay SJ be connected with breaking coil TQ, time relay sj and the breaking coil TQ other ends are all connected with power network zero line N;
Time relay sj timing closing switch contact in shutting-brake control, left end is connected with power network live wire L, right-hand member and closing coil HQ is connected, and the closing coil HQ other ends are connected with power network zero line N;
First breaker DL in relay and control(7)Switch contact and intermediate relay ZJ switch contact left end all with power network live wire L End is connected, and right-hand member is all connected with intermediate relay ZJ, and the intermediate relay ZJ other end is connected with power network zero line N.
2. photovoltaic inversion single phase ac grid connection box according to claim 1, it is characterised in that the lightning protection unit(4) By the second breaker DL(8)With lightning protection device SPD(9)It is composed in series, lightning protection device SPD(9)The other end is grounded.
3. photovoltaic inversion single phase ac grid connection box according to claim 1, it is characterised in that the first breaker DL(7) It is exchange breaker of plastic casing.
4. photovoltaic inversion single phase ac grid connection box according to claim 2, it is characterised in that the lightning protection device SPD(9)Choosing Use DS42-230/G/2P.
5. photovoltaic inversion single phase ac grid connection box according to claim 1, it is characterised in that the first breaker DL(7) From CDM1-63L/3330/3P, disconnecting switch(6)From DZ47-63/C50A/2P.
CN201510498625.XA 2015-08-14 2015-08-14 Photovoltaic inversion single phase ac grid connection box Active CN105071439B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107834607A (en) * 2017-12-17 2018-03-23 无锡优耐特能源科技有限公司 A kind of distribution box for photovoltaic plant
CN111509667B (en) * 2020-05-29 2022-04-19 常州佳讯光电系统工程有限公司 Undervoltage protection control device matched with distributed photovoltaic grid-connected switch

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203645346U (en) * 2013-12-26 2014-06-11 常熟开关制造有限公司(原常熟开关厂) Photovoltaic power generation inverter
CN203747436U (en) * 2014-03-21 2014-07-30 国家电网公司 Distributed photovoltaic power generation access system
CN104135029A (en) * 2014-07-17 2014-11-05 泰兴市华诚机电制造有限公司 Distributed solar grid-connected control box
CN204088904U (en) * 2014-09-19 2015-01-07 常熟开关制造有限公司(原常熟开关厂) A kind of multi-functional photovoltaic exchanges header box
CN204992611U (en) * 2015-08-14 2016-01-20 国家电网公司 Photovoltaic contravariant single phase alternating current and box with a net

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203645346U (en) * 2013-12-26 2014-06-11 常熟开关制造有限公司(原常熟开关厂) Photovoltaic power generation inverter
CN203747436U (en) * 2014-03-21 2014-07-30 国家电网公司 Distributed photovoltaic power generation access system
CN104135029A (en) * 2014-07-17 2014-11-05 泰兴市华诚机电制造有限公司 Distributed solar grid-connected control box
CN204088904U (en) * 2014-09-19 2015-01-07 常熟开关制造有限公司(原常熟开关厂) A kind of multi-functional photovoltaic exchanges header box
CN204992611U (en) * 2015-08-14 2016-01-20 国家电网公司 Photovoltaic contravariant single phase alternating current and box with a net

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