CN102013690A - MMC (multimedia controller)-based modular multi-level transformerless inductive energy storage topological structure - Google Patents

MMC (multimedia controller)-based modular multi-level transformerless inductive energy storage topological structure Download PDF

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Publication number
CN102013690A
CN102013690A CN2010102340692A CN201010234069A CN102013690A CN 102013690 A CN102013690 A CN 102013690A CN 2010102340692 A CN2010102340692 A CN 2010102340692A CN 201010234069 A CN201010234069 A CN 201010234069A CN 102013690 A CN102013690 A CN 102013690A
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China
Prior art keywords
energy storage
inductive energy
topological structure
mmc
switching device
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CN2010102340692A
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Chinese (zh)
Inventor
魏西平
张跃平
胡涛
张坤
李太峰
杨洋
赵淑玉
王振
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Rongxin Power Electronic Co Ltd
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Rongxin Power Electronic Co Ltd
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Priority to CN2010102340692A priority Critical patent/CN102013690A/en
Publication of CN102013690A publication Critical patent/CN102013690A/en
Priority to PCT/CN2011/076857 priority patent/WO2012010055A1/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • 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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Inverter Devices (AREA)

Abstract

The invention relates to an MMC (multimedia controller)-based modular multi-level transformerless inductive energy storage topological structure, the topological structure comprises three phases, and each phase is formed by connecting a plurality of sub-units constituted by half-bridge type power modules and inductive energy storage modules in series and is connected into a power grid via a buffer inductor. Each half-bridge type power module is formed by connecting an even number (n) of power units in series and is divided into an upper group and a lower group, the number of the power units in each group is n/2, the voltage level step number of the output phase is n/2 plus 1, and the line voltage level number is n plus 1; and the output end of each phase is arranged at the middle point of two groups of the units, and the output end is connected with each group of the units by a coupling or uncoupling inductor. The topological structure has the benefits that the input end is transformerless, the production period is short, the volume is small, the cost is low, the occupied area is small, the transportation is convenient, and the structure is simple; and as superconducting energy storage is adopted, the conversion efficiency is high and the response speed is fast.

Description

A kind of transless inductive energy storage topological structure based on the MMC modular multilevel
Technical field
The present invention relates to a kind of transless inductive energy storage topology and can be used for the high-voltage electric power system field, make the electrical network supply load reliable, high-quality voltage based on MMC (Modular Multilevel Converter) modular multilevel inverter.
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 MMC, 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 based on MMC, this topological structure comprises three-phase, every subelement that is made of a plurality of semi-bridge type power models and inductive energy storage module is cascaded, and inserts electrical network through buffer inductance.
Described semi-bridge type power model is formed by an even number n power unit cascade, is divided into two groups up and down, and every group power cell number is n/2, and output phase voltage level ladder number is n/2+1, and line voltage level number is n+1; The output of every phase is the midpoint of two groups of unit, and is connected with coupling or non-coupling inductance between output and the every group of unit.
Described power cell is a half-bridge structure, and switching device IGBT1 and IGBT2 are in series, and IGBT1 of parallel connection direct capacitor C, and switching device again and IGBT2 be inverse parallel diode D1, D2 respectively; The common port of IGBT1 and IGBT2, the common port of capacitor C and IGBT2 link to each other with other unit as the output of each unit.
Described inductive energy storage module is by superconducting coil, switching device IGBT3, switching device IGBT4, form with IGBT3 and the antiparallel diode D5 of IGBT4, D6 and diode D3, D4, superconducting coil and diode D3, switching device IGBT3 constitute the stored energy loop, superconducting coil also constitutes the stored energy loop with diode D4, switching device IGBT4, and this inductive energy storage module and electric capacity are in parallel.
Compared with prior art, the invention has the beneficial effects as follows:
1) input transless, and then make and under this kind inductive energy storage topology apparatus and same voltage, the power grade comparing of transformer arranged, the production cycle reduces half, volume reduces half, and cost reduces half, and floor space reduces half, convenient transportation, simple in structure;
2) adopt superconducting energy storage to have conversion efficiency height, the fast advantage of response speed;
3) modulator approach adopts the method for phase-shifting carrier wave, can produce the multi-ladder sine wave, obtains good output voltage waveforms with less switching frequency;
4) 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 based on the transless inductive energy storage topology diagram of MMC;
Fig. 2 is based on the transless inductive energy storage topology basic cell structure figure of MMC.
Embodiment
See Fig. 1, a kind of transless inductive energy storage topological structure based on MMC, this topological structure comprises three-phase, every subelement that is made of a plurality of semi-bridge type 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.
The semi-bridge type power model is formed by an even number n power unit cascade, is divided into two groups up and down, and every group power cell number is n/2, and output phase voltage level ladder number is n/2+1, and line voltage level number is n+1; The output of every phase is the midpoint of two groups of unit, and between output and the every group of unit with coupling or non-coupling inductance L A, L B, L CConnect.
See Fig. 2, power cell is a half-bridge structure, and switching device IGBT1 and IGBT2 are in series, and IGBT1 of parallel connection direct capacitor C, and switching device again and IGBT2 be inverse parallel diode D1, D2 respectively; The common port of IGBT1 and IGBT2, the common port of capacitor C and IGBT2 link to each other with other unit as the output of each unit.
The inductive energy storage module is made up of superconducting coil Lc, switching device IGBT3, switching device IGBT4, diode D3, D4, D5, D6, see Fig. 2, superconducting coil and diode D3, switching device IGBT3 constitute the stored energy loop, superconducting coil also constitutes the stored energy loop with diode D4, switching device IGBT4, and this inductive energy storage module and electric capacity are in parallel.
See Fig. 1, a kind of inductive energy storage topological structure based on the MMC multilevel unit-in-series in conjunction with certain modulator approach, can produce many level-variables sine voltage that electrical network needs.This inductive energy storage topological structure is mainly by three phase compositions, whenever formed by the individual power unit cascade of n (n is an even number).The series unit number is called unit progression, and the output terminals A of every phase, B, C end is in the midpoint of upper and lower two groups of unit, and is connected with coupling inductance or non-coupling inductance between output and the every group of unit, and output waveform is stablized smoothly more.Should directly export to the high-quality alternating voltage of electrical network based on the inductive energy storage topology apparatus of MMC from A, B, C side.
See Fig. 2, when line voltage produces spike, voltage is powered to DC side by diode D1, IGBT3, IGBT4, open IGBT3, the IGBT4 of each unit, at this moment, should absorb electric network peak based on inductive energy storage topology dc bus capacitor C and the superconducting coil Lc of MMC, and then suppress the influence of electric network peak equipment on the electrical network.When line voltage falls suddenly or interrupts, by IGBT1, the IGBT2 that controls each unit, turn-off IGBT3, IGBT4, at this moment, the energy feedback grid among dc bus capacitor C and the superconducting coil Lc makes electrical network output normal voltage.When line voltage just often, turn-off IGBT1, IGBT2, open IGBT3 or IGBT4, at this moment, the electric current in the superconducting coil forms the loop by D3 and IGBT3, or forms the loop by D4 and IGBT4, store energy is in superconducting coil.
The transless inductive energy storage topology that the present invention is based on MMC can be the electrical network of 1～500KV and does redundant electrical power, and input transless, inductive energy storage 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 (4)

1. the transless inductive energy storage topological structure based on MMC is characterized in that this topological structure comprises three-phase, and every subelement that is made of a plurality of semi-bridge type power models and inductive energy storage module is cascaded, and inserts electrical network through buffer inductance.
2. the transless inductive energy storage topological structure based on MMC according to claim 1, it is characterized in that, described semi-bridge type power model is formed by an even number n power unit cascade, be divided into two groups up and down, every group power cell number is n/2, output phase voltage level ladder number is n/2+1, and line voltage level number is n+1; The output of every phase is the midpoint of two groups of unit, and is connected with coupling or non-coupling inductance between output and the every group of unit.
3. the transless inductive energy storage topological structure based on MMC according to claim 2, it is characterized in that, described power cell is a half-bridge structure, switching device IGBT1 and IGBT2 are in series, IGBT1 of parallel connection direct capacitor C, and switching device again and IGBT2 be inverse parallel diode D1, D2 respectively; The common port of IGBT1 and IGBT2, the common port of capacitor C and IGBT2 link to each other with other unit as the output of each unit.
4. according to each described transless inductive energy storage topological structure in the claim 1 to 3 based on MMC, it is characterized in that, described inductive energy storage module is made up of superconducting coil, switching device IGBT3, switching device IGBT4, diode D3, D4, superconducting coil and diode D3, switching device IGBT3 constitute the stored energy loop, superconducting coil also constitutes the stored energy loop with diode D4, switching device IGBT4, and this inductive energy storage module and electric capacity are in parallel.
CN2010102340692A 2010-07-22 2010-07-22 MMC (multimedia controller)-based modular multi-level transformerless inductive energy storage topological structure Pending CN102013690A (en)

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PCT/CN2011/076857 WO2012010055A1 (en) 2010-07-22 2011-07-05 Topology for modular multilevel converter-based transformerless inductance energy-saving

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
WO2012010055A1 (en) * 2010-07-22 2012-01-26 荣信电力电子股份有限公司 Topology for modular multilevel converter-based transformerless inductance energy-saving
CN105071675A (en) * 2015-07-23 2015-11-18 浙江大学 Hybrid power switch and application thereof in flexible direct current power transmission converter
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
US9608544B2 (en) 2012-09-14 2017-03-28 Robert Bosch Gmbh Energy supply system comprising an energy storage device and method for actuating coupling devices of the energy storage device

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EP3314714B1 (en) 2015-06-29 2019-11-06 ABB Schweiz AG A multi-level power converter and a method for controlling a multi-level power converter
CN105140906A (en) * 2015-07-30 2015-12-09 特变电工新疆新能源股份有限公司 Modular multilever converter (MMC) module topological structure applicable for flexible direct current transmission
CN105305405B (en) * 2015-09-29 2018-01-16 特变电工新疆新能源股份有限公司 A kind of MMC module topologies applied to MMC type flexible DC power transmission

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012010055A1 (en) * 2010-07-22 2012-01-26 荣信电力电子股份有限公司 Topology for modular multilevel converter-based transformerless inductance energy-saving
US9608544B2 (en) 2012-09-14 2017-03-28 Robert Bosch Gmbh Energy supply system comprising an energy storage device and method for actuating coupling devices of the energy storage device
CN104620492B (en) * 2012-09-14 2017-10-27 罗伯特·博世有限公司 Method and energy supply system for the coupling device that controls energy storing device
CN105071675A (en) * 2015-07-23 2015-11-18 浙江大学 Hybrid power switch and application thereof in flexible direct current power transmission converter
CN105071675B (en) * 2015-07-23 2018-03-09 浙江大学 A kind of mixed type power switch and its application in flexible direct-current transmission converter
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