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CN103259283A - Distributed generation grid connection reverse current delivery on-load voltage regulation device - Google Patents

Distributed generation grid connection reverse current delivery on-load voltage regulation device Download PDF

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Publication number
CN103259283A
CN103259283A CN201310138791XA CN201310138791A CN103259283A CN 103259283 A CN103259283 A CN 103259283A CN 201310138791X A CN201310138791X A CN 201310138791XA CN 201310138791 A CN201310138791 A CN 201310138791A CN 103259283 A CN103259283 A CN 103259283A
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CN
China
Prior art keywords
voltage
transformer
contactor
inverter
power supply
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Pending
Application number
CN201310138791XA
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Chinese (zh)
Inventor
娄志林
张恩理
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HUNAN TLNZ SOLAR TECHNOLOGY Co Ltd
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HUNAN TLNZ SOLAR TECHNOLOGY Co Ltd
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Priority to CN201310138791XA priority Critical patent/CN103259283A/en
Publication of CN103259283A publication Critical patent/CN103259283A/en
Pending legal-status Critical Current

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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
    • 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

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  • Inverter Devices (AREA)

Abstract

The invention discloses a distributed generation grid connection reverse current delivery on-load voltage regulation device. On the basis of a first transformer B1, a second transformer B2 is additionally arranged, and a high-voltage winding of the first transformer B1 and a high-voltage winding of the second transformer B2 are connected in series. A contactor K2 is arranged on a star point of the first transformer B1, a low-voltage winding of the second transformer B2 is connected with output of an inverter N1, and input of the inverter N1 is connected with a power supply on a user side through a contactor K1. A voltage transformer B3 is connected in front of the contactor K1, required control power supply information and voltage amplitude information of the inverter N1 are obtained through the voltage transformer B3, and the power supply information and the voltage information of a computer control module are not controlled by the contactor K1. A continuously adjustable alternating voltage is output through the inverter, and the voltage is output through a newly added transformer and superposed with an existing voltage to achieve a goal of adjusting a voltage on a high-voltage edge.

Description

A kind of distributed power generation is incorporated into the power networks against sending electric on-load voltage regulating device
Technical field
The present invention relates to the power transmission and transformation technology, relate in particular to distributed power generation and be incorporated into the power networks against sending electric on-load voltage regulating device.
Technical background
The tradition fossil energy faces exhaustion, must Renewable Energy Development be global at present common recognition, also is the energy policy of our country.Be that the present market share of regenerative resource of representative progressively enlarges with photovoltaic, wind-powered electricity generation.The natural instability of resource power of this class resource of photovoltaic and wind-powered electricity generation, its generated output and bearing power can not be synchronous fully, when being used for distributed power generation, when generated output can not be dissolved in the short time, be the energy of avoiding waste, the simplest, the most most effective way is exactly the contrary net of serving.But contrary serve net again because the step-down loss of former supply line, if send electricity conversely, the voltage that must raise user's side contrary the seeing off of just being incorporated into the power networks, but user's side is because the problem of Electrical Safety, rising that can not voltage is unlimited again.Solution is exactly on-load voltage regulation, changes the no-load voltage ratio of transformer between user's side and the electric line, reaches the purpose of adjusting voltage.
A kind of traditional on-load voltage regulation mode is, draws a lot of taps in the high-pressure side of transformer, shifts gears, and takes certain technical measures again, and voltage keeps continuously when making gearshift.This mode is used in the contrary electricity that send of distributed power generation and goes up some problems of existence: the one, and the transformer that has now in operation does not possess so much tap, and the pressure regulation of can't shifting gears must be changed existing transformer, and cost is very high; The 2nd, it is discontinuous that the voltage of adjusting is regulated in gearshift, and a mutation process is arranged; The 3rd, gear is regulated must mechanical movement, exists wearing and tearing and contact to ablate, and failure rate is higher.
Summary of the invention
The object of the present invention is to provide a kind of distributed power generation to be incorporated into the power networks against sending electric on-load voltage regulating device.
The increase distributed power generation is incorporated into the power networks against sending electric problem in the existing distribution network in order to solve, must could solve the contrary power obstructing problem that send electricity with load tapchanging mode, on the basis of not changing existing transformer, increase a transformer, in hot side and existing transformer series operation, at inverter of low pressure edge joint.It is a kind of continuous stepless regulator that need not to change existing transformer, do not want tap.
On the basis of the first transformer B1, set up the second transformer B2, the high pressure windings in series of the first transformer B1 and the second transformer B2; The asterism of the first transformer B1 is established contactor K2, and the low pressure winding of the second transformer B2 links to each other with the output of described inverter N1, and the input of described inverter N1 links to each other with the power supply of user's side by the contact K1 of contactor; Voltage transformer B3 is connected in before the contactor K1, and the control power supply that inverter N1 is required and voltage amplitude information obtain by voltage transformer B3, make the power supply of computer control module and the control that information of voltage is not subjected to contactor K1.
Further, inverter is made up of microcomputer controlling module, rectifying and voltage-stabilizing module, rectified three-phase circuit, three-phase inverter bridge circuit.For example the 380V power supply is powered to three-phase inverter bridge circuit by three-phase commutation bridge, the power supply of computer control module obtains by voltage transformer B3, rectifying and voltage-stabilizing module, the voltage amplitude information of 380V obtains by voltage transformer B3, the computer control module by comparative analysis 380V voltage amplitude information after, the output amplitude of two contactor break-makes of control contactor K1, contactor K2, three-phase bridge type inverse, three phase inverter bridge is exported to transformer B2 by filtration module.
Operation principle and process: after microcomputer controlling module obtains 380V side information of voltage by voltage transformer, compare by analysis.If voltage is suitable, then disconnect contactor K1, closed contactor K2, make pressure regulation partly throw off electric power system, allow former supply line work alone, in case the contrary electricity that send with regard to closed contactor K1, disconnection contactor K2, makes regulating circuit participation work.And suitable voltage of control three phase inverter bridge output raises high side voltage by the second transformer B2 and on high-tension side Voltage Series, makes user's side voltage 380V basicly stable, and reaches electrical power is incorporated into the power networks against the purpose of sending.The capacity of transformer B2 is determined according to the principle of P=IU, if range of regulation control is in the scope of supply power voltage ± 15%.Then the capacity of transformer B2 and inverter needs only 15% of former supply transformer B1 capacity, and its high pressure winding rated output voltage also is to be 1500V design by 15% of the B1 of former transformer, the no-load voltage ratio 380V/1500 design of B2.
Beneficial effect of the present invention is, exports continuously adjustable alternating voltage by inverter, the transformer output of this voltage by increasing newly, and the voltage stack with original reaches the purpose of adjusting hot side voltage.Be equipped with that distributed power source needs and contrary when sending electricity the user of all existing supply lines, existing transformer all need not to be replaced with on-load tap-changing transformer, the transformer that only needs to increase former transformer capacity about 15% just can boost against serving net, reduces investment cost greatly.
Description of drawings
Fig. 1 is circuit diagram of the present invention.
Fig. 2 is inverter circuit schematic diagram of the present invention.
Embodiment
As shown in Figure 1 and Figure 2, with a 10KV 400V, the supply transformer of 1000KVA is example.It is 150KVA's that B2 selects a capacity, output rated voltage is that 1500V, voltage ratio are the transformer of 1500/380V grade, K1 is the contactor of 380V, select the contactor of 400A by the capacity of 150KVA, the operating voltage that K2 disconnects is 1500V, selects the contactor of a 3000V/100A to get final product, instrument transformer B3 selects 400V/5V, 100VA, inverter N1(contains rectifying and voltage-stabilizing module and microcomputer controlling module) select the 400V-820VDC input, software is revised and is installed three-phase commutation bridge additional getting final product on request.
On the basis of existing transformer B1, increase a transformer B2, the high pressure winding of B1, B2 is connected into the series connection form.The asterism of B1 replaces with the contact of a contactor K2, B2 with the low pressure winding link to each other with the output of inverter N1, the contact that contactor K1 is passed through in the input of inverter links to each other with the 380V power supply of user's side.Voltage transformer B3 is connected on before the contactor K1, and control power supply and voltage amplitude information that inverter is required obtain by B3, makes the power supply of computer control module and the control that information of voltage is not subjected to K1.
The 380V power supply of inverter provides power supply by three-phase commutation bridge to three-phase bridge type converter, and inner is made up of microcomputer controlling module, rectifying and voltage-stabilizing module, rectified three-phase circuit, three-phase inverter bridge circuit.The 380V power supply is powered to three-phase inverter bridge circuit by three-phase commutation bridge, the power supply of computer control module obtains by voltage transformer B3, rectifying and voltage-stabilizing module, the voltage amplitude information of 380V obtains by voltage transformer B3, the computer control module by comparative analysis 380V voltage amplitude information after, the output amplitude of two contactor break-makes of control contactor K1, contactor K2, three-phase bridge type inverse, three phase inverter bridge to transformer B2 output, reaches the purpose of adjusting voltage by filtration module.
Transformer, filtration module, contactor and rectifying and voltage-stabilizing module all are commercially available matured products, microcomputer controlling module and three phase inverter bridge also all are ripe circuits, compare with general inverter, need control software is designed and adjusts, the insider realizes easily by target call of the present invention.

Claims (2)

1. a quantum cutting photovoltaic module comprises glass outer, encapsulating film, battery sheet, it is characterized in that: contain the rare earth element particulate that possesses quantum cutting effect in the described encapsulating film.
2. quantum cutting photovoltaic module according to claim 1, it is characterized in that: described encapsulating film is ethylene-vinyl acetate copolymer, i.e. EVA film, VA content is 28%-38% in the described EVA film, described VA evenly adds for example BaF in the vinyl acetate 2Micro mist mixes rhenium Re simultaneously 3+, ytterbium Yb 3+Ion makes described rhenium Re 3+, ytterbium Yb 3+Ions diffusion is to described BaF 2In the micro mist, form the described rare earth element particulate that possesses quantum cutting effect; Described BaF 2The percentage by weight that accounts for described vinyl acetate is 0.15-0.3%; Described rhenium Re 3+, ytterbium Yb 3+Ion concentration is described BaF 21-15%.
CN201310138791XA 2013-04-22 2013-04-22 Distributed generation grid connection reverse current delivery on-load voltage regulation device Pending CN103259283A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310138791XA CN103259283A (en) 2013-04-22 2013-04-22 Distributed generation grid connection reverse current delivery on-load voltage regulation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310138791XA CN103259283A (en) 2013-04-22 2013-04-22 Distributed generation grid connection reverse current delivery on-load voltage regulation device

Publications (1)

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CN103259283A true CN103259283A (en) 2013-08-21

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104485215A (en) * 2014-12-25 2015-04-01 贵州电力试验研究院 On-load capacitance regulating and on-load voltage regulating distribution transformer
CN104617582A (en) * 2014-11-12 2015-05-13 国家电网公司 Photo-thermal combined grid power generation on-load voltage regulation control method
CN106229990A (en) * 2016-09-08 2016-12-14 镇江世晟电气有限公司 The load ratio bridging switch regulator of a kind of distribution transformer, system and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104617582A (en) * 2014-11-12 2015-05-13 国家电网公司 Photo-thermal combined grid power generation on-load voltage regulation control method
CN104617582B (en) * 2014-11-12 2017-02-01 国家电网公司 Photo-thermal combined grid power generation on-load voltage regulation control method
CN104485215A (en) * 2014-12-25 2015-04-01 贵州电力试验研究院 On-load capacitance regulating and on-load voltage regulating distribution transformer
CN106229990A (en) * 2016-09-08 2016-12-14 镇江世晟电气有限公司 The load ratio bridging switch regulator of a kind of distribution transformer, system and method
CN106229990B (en) * 2016-09-08 2018-12-25 镇江世晟电气有限公司 A kind of load ratio bridging switch regulator, the system and method for distribution transformer

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Application publication date: 20130821