CN102013696A - Transformer free inductance energy-storing topological structure - Google Patents

Transformer free inductance energy-storing topological structure Download PDF

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Publication number
CN102013696A
CN102013696A CN2010102337168A CN201010233716A CN102013696A CN 102013696 A CN102013696 A CN 102013696A CN 2010102337168 A CN2010102337168 A CN 2010102337168A CN 201010233716 A CN201010233716 A CN 201010233716A CN 102013696 A CN102013696 A CN 102013696A
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CN
China
Prior art keywords
diode
topological structure
energy storage
energy
superconducting coil
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
Application number
CN2010102337168A
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Chinese (zh)
Inventor
魏西平
赵淑玉
张跃平
胡涛
张坤
李太峰
杨洋
王振
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rongxin Power Electronic Co Ltd
Original Assignee
Rongxin Power Electronic Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rongxin Power Electronic Co Ltd filed Critical Rongxin Power Electronic Co Ltd
Priority to CN2010102337168A priority Critical patent/CN102013696A/en
Publication of CN102013696A publication Critical patent/CN102013696A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J15/00Systems for storing electric energy
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00Superconducting magnets; Superconducting coils
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • 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
    • 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
    • Y02E10/70Wind energy
    • Y02E10/76Power conversion electric or electronic aspects
    • 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
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
    • 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
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

Abstract

The invention relates to a transformer free inductance energy-storing topological structure which comprises three phases, wherein each phase is formed by serially connecting sub units consisting of a plurality of H bridge power modules and an inductance energy-storing module and accessed to a power grid through a buffer inductance; the inductance energy-storing module comprises a superconducting coil Lc, a switching element IGBT5 (Insulated Gate Bipolar Transistor), a switching element IGBT6, a diode D1 and a diode D2; the superconducting coil Lc and the diode D1 and the switching element IGBT5 form an energy-storing loop; the superconducting coil Lc and the diode D2 and the switching element IGBT6 form an energy-storing loop; and the inductance energy-storing module is connected in parallel with a capacitor C. The topological structure is connected in parallel to the power grid, and the input end of the topological structure is not provided with a transformer, thus the invention has the advantages of small volume, light weight and low cost, can inhibit power pollution of the power grid, can compensate instability of photovoltaic or wind energy power generation, provides a continuous, clean, stable and high-quality sine wave voltage without frequency discontinuity for loads on the power grid, and has the characteristics of high conversion efficiency and high response speed.

Description

A kind of transless inductive energy storage topological structure
Technical field
The present invention relates to a kind of transless inductive energy storage topological structure, can be used for the high-voltage electric power system field, make the electrical network supply load reliable, high-quality voltage.
Background technology
At present, there are following nine kinds of problems at least in electrical network: outage, thunderbolt spike, surge, frequency oscillation, voltage jump, voltage fluctuation, frequency drift, electric voltage dropping, impulse disturbances etc.Regenerative resource is also extremely instability of photovoltaic or electric energy that wind energy produced for example, the new forms of energy scale of using that is incorporated into the power networks is big more, electrical network is just dangerous more, practice according to domestic and international honourable electric station grid connection, can realize the balance output of generation of electricity by new energy power making large-scale wind power and solar electric power incorporate conventional electrical network easily and reliably into by energy storage technology.
At present the electric power energy storage device all is in parallel by transformer and electrical network, adopts transformer, makes that equipment investment is big, occupation of land is many, the cost height, and the production cycle is long.
Summary of the invention
The purpose of this invention is to provide a kind of transless inductive energy storage topological structure based on the MMC modular multilevel, this topology is connected in parallel on the electrical network, the input transless, and volume is little, in light weight, cost is low; Those electric pollutions that can suppress electrical network can compensate the unsteadiness of photovoltaic or wind power generation, to the load on the electrical network provide uninterruptedly, clean, stable, no frequency discontinuity, high-quality sine voltage; And conversion efficiency height, response speed are fast.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of transless inductive energy storage topological structure, this topological structure comprises three-phase, every subelement that is made of a plurality of H bridge power models and inductive energy storage module is cascaded, and inserts electrical network through buffer inductance.
Described H bridge power model is made up of four IGBT switching devices, and diode of each IGBT switching device inverse parallel is after per two IGBT switching devices are in series, in parallel with dc capacitor C again.
Described inductive energy storage module is made up of superconducting coil Lc, switching device IGBT5, switching device IGBT6, diode D1, D2, superconducting coil Lc and diode D1, switching device IGBT5 constitute the stored energy loop, superconducting coil Lc also constitutes the stored energy loop with diode D2, switching device IGBT6, and this inductive energy storage module and capacitor C are in parallel.
Compared with prior art, the invention has the beneficial effects as follows:
1) input transless, and then make and under this inductive energy storage topology apparatus and same voltage, the power grade comparing of transformer arranged, the production cycle reduces half, and volume reduces half, and cost reduces half, and floor space reduces half, and convenient transportation is simple in structure;
2) do not adopt batteries to store energy, the superconducting energy storage of employing has conversion efficiency height, the fast advantage of response speed;
3) reduce or to improve capacitance grade fairly simple, a number of unit that only needs to reduce or increase series connection gets final product.
Description of drawings
Fig. 1 is a transless inductive energy storage topology diagram;
Fig. 2 is transless inductive energy storage topology basic cell structure figure.
Embodiment
See Fig. 1, a kind of transless inductive energy storage topological structure, this topological structure comprises three-phase, every subelement that is made of a plurality of H bridge power models and inductive energy storage module is cascaded, and inserts electrical network through buffer inductance L.Inductance L also connects buffer resistance R, and after buffer resistance R and K switch 2 were in parallel, K1 was connected with circuit breaker.
See Fig. 2, H bridge power model is made up of switching device IGBT1, IGBT2, IGBT3, IGBT4, and switching device IGBT1 and IGBT2 are in series, and switching device IGBT3 and IGBT4 are in series, again with dc capacitor C parallel connection.And four switching device IGBT1, IGBT2, IGBT3, IGBT4 distinguish a reversal connection diode D11 in parallel, D22, D33, D44.Input, output that the common port of IGBT1 and IGBT2, IGBT3 and the common port of IGBT4 are connected with other power model for this power model.
The inductive energy storage module is made up of superconducting coil Lc, switching device IGBT5, switching device IGBT6, diode D1, D2, D3, D4, superconducting coil Lc and diode D1, switching device IGBT5 constitute the stored energy loop, superconducting coil Lc also constitutes the stored energy loop with diode D2, switching device IGBT6, and this inductive energy storage module and capacitor C are in parallel.
When the electrical network output voltage is undesired, adopt many power unit cascade output high pressure as shown in Figure 1, export many level waveform by modulation algorithm, produce the load on the high-quality sine voltage supply electrical network.
When line voltage produces spike, voltage is powered to DC side by diode D11, D44 and IGBT5, IGBT6, as shown in Figure 2, and at this moment, inductive energy storage topology dc bus capacitor C of the present invention and superconducting coil Lc absorb electric network peak, and then have suppressed the influence of electric network peak to equipment on the electrical network.When line voltage falls suddenly or interrupts, by controlling each unit IGBT1~IGBT4 of (as shown in Figure 2), turn-off IGBT5, IGBT6, at this moment, the energy feedback grid among dc bus capacitor C and the superconducting coil Lc makes electrical network output normal sinusoidal wave.When line voltage just often, turn-off IGBT1~IGBT4, open IGBT5 or IGBT6, at this moment, the electric current among the superconducting coil Lc forms the loop by D1 and IGBT5, or forms the loop by D2 and IGBT6, store energy is in superconducting coil Lc.
The electrical network that transless inductive energy storage topology of the present invention can be 1~500KV is done redundant electrical power, and input transless, inductive energy storage topology of the present invention adopts superconducting energy storage, with respect to batteries to store energy, energy storage modes such as flywheel energy storage, superconducting energy storage have conversion efficiency height, the fast advantage of response speed, and both can carry out the adjusting of active power, can carry out the adjusting of reactive power again, can also carry out idle meritorious independent control simultaneously, have very high flexibility.This makes superconducting magnetic energy storage can play the effect that improves stability of power system.When needs improved electric pressure, the number of unit that only needs to improve series connection got final product.

Claims (3)

1. a transless inductive energy storage topological structure is characterized in that this topological structure comprises three-phase, and every subelement that is made of a plurality of H bridge power models and inductive energy storage module is cascaded, and inserts electrical network through buffer inductance.
2. transless inductive energy storage topological structure according to claim 1, it is characterized in that described H bridge power model is made up of four IGBT switching devices, diode of each IGBT switching device inverse parallel, after per two IGBT switching devices are in series, in parallel with dc capacitor C again.
3. transless inductive energy storage topological structure according to claim 1 and 2, it is characterized in that, described inductive energy storage module is made up of superconducting coil Lc, switching device IGBT5, switching device IGBT6, diode D1, D2, superconducting coil Lc and diode D1, switching device IGBT5 constitute the stored energy loop, superconducting coil Lc also constitutes the stored energy loop with diode D2, switching device IGBT6, and this inductive energy storage module and capacitor C are in parallel.
CN2010102337168A 2010-07-22 2010-07-22 Transformer free inductance energy-storing topological structure Pending CN102013696A (en)

Priority Applications (1)

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CN2010102337168A CN102013696A (en) 2010-07-22 2010-07-22 Transformer free inductance energy-storing topological structure
PCT/CN2011/076864 WO2012010057A1 (en) 2010-07-22 2011-07-05 A transformerless inductive energy storage topology structure

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012010057A1 (en) * 2010-07-22 2012-01-26 荣信电力电子股份有限公司 A transformerless inductive energy storage topology structure
CN102663174A (en) * 2012-03-23 2012-09-12 浙江大学 Simulation method of MMC (modular multilevel converter) and application thereof
CN102684534A (en) * 2012-04-27 2012-09-19 西安理工大学 High-capacity superconducting energy storage transducer provided with H-bridge current transformer
CN103337873A (en) * 2013-06-09 2013-10-02 阳光电源股份有限公司 Photovoltaic power generation system
CN105356770A (en) * 2015-11-16 2016-02-24 特变电工新疆新能源股份有限公司 MMC submodule topological structure based on H-bridge

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JP2007037290A (en) * 2005-07-27 2007-02-08 Mitsubishi Heavy Ind Ltd Power compensator
CN101291071A (en) * 2008-06-18 2008-10-22 张皓 Electric inverter for direct grid connecting of wind power generation
CN101710704A (en) * 2009-12-17 2010-05-19 清华大学 Electric energy adjustment device for active and reactive power adjustment of high-voltage system
CN201774270U (en) * 2010-07-22 2011-03-23 荣信电力电子股份有限公司 Transformer-free inductive energy storage topological structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100336277C (en) * 2005-06-03 2007-09-05 清华大学 Dynamic voltage compensator in series type by using super conduct to store energy
CN102013696A (en) * 2010-07-22 2011-04-13 荣信电力电子股份有限公司 Transformer free inductance energy-storing topological structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007037290A (en) * 2005-07-27 2007-02-08 Mitsubishi Heavy Ind Ltd Power compensator
CN101291071A (en) * 2008-06-18 2008-10-22 张皓 Electric inverter for direct grid connecting of wind power generation
CN101710704A (en) * 2009-12-17 2010-05-19 清华大学 Electric energy adjustment device for active and reactive power adjustment of high-voltage system
CN201774270U (en) * 2010-07-22 2011-03-23 荣信电力电子股份有限公司 Transformer-free inductive energy storage topological structure

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012010057A1 (en) * 2010-07-22 2012-01-26 荣信电力电子股份有限公司 A transformerless inductive energy storage topology structure
CN102663174A (en) * 2012-03-23 2012-09-12 浙江大学 Simulation method of MMC (modular multilevel converter) and application thereof
CN102663174B (en) * 2012-03-23 2014-01-01 浙江大学 Simulation method of MMC (modular multilevel converter) and application thereof
CN102684534A (en) * 2012-04-27 2012-09-19 西安理工大学 High-capacity superconducting energy storage transducer provided with H-bridge current transformer
CN103337873A (en) * 2013-06-09 2013-10-02 阳光电源股份有限公司 Photovoltaic power generation system
CN105356770A (en) * 2015-11-16 2016-02-24 特变电工新疆新能源股份有限公司 MMC submodule topological structure based on H-bridge
CN105356770B (en) * 2015-11-16 2019-01-29 特变电工新疆新能源股份有限公司 A kind of MMC submodule topological structure based on H bridge

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Application publication date: 20110413