WO2012010053A1 - Structure topologique de compensateur synchrone statique sans transformateur (statcom) à base de convertisseur modulaire à niveaux multiples (mmc) - Google Patents

Structure topologique de compensateur synchrone statique sans transformateur (statcom) à base de convertisseur modulaire à niveaux multiples (mmc) Download PDF

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Publication number
WO2012010053A1
WO2012010053A1 PCT/CN2011/076850 CN2011076850W WO2012010053A1 WO 2012010053 A1 WO2012010053 A1 WO 2012010053A1 CN 2011076850 W CN2011076850 W CN 2011076850W WO 2012010053 A1 WO2012010053 A1 WO 2012010053A1
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WO
WIPO (PCT)
Prior art keywords
statcom
mmc
topological structure
modular multilevel
standard power
Prior art date
Application number
PCT/CN2011/076850
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English (en)
Chinese (zh)
Inventor
张坤
杨洋
赵淑玉
张跃平
胡涛
李太峰
魏西平
王振
Original Assignee
荣信电力电子股份有限公司
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Application filed by 荣信电力电子股份有限公司 filed Critical 荣信电力电子股份有限公司
Publication of WO2012010053A1 publication Critical patent/WO2012010053A1/fr

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Classifications

    • 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
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
    • H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
    • H02J3/1864—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein the stepless control of reactive power is obtained by at least one reactive element connected in series with a semiconductor switch
    • 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
    • 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
    • Y02E40/10—Flexible AC transmission systems [FACTS]

Definitions

  • STATCOM Transformerless Static Synchronous Compensator
  • ⁇ C Modular Multilevel Inverter
  • the invention relates to a transformerless STATCOM topology based on MMC (Modular Multilevel Converter) modular multilevel inverter. Background technique
  • Reactive power compensation is one of the effective measures to ensure efficient and reliable operation of the power system.
  • the nationwide distribution network transformation is in full swing.
  • the most practical way to solve the current power grid loss, large voltage drop and large voltage drop in the grid, especially the low-voltage city network and the rural power grid, is to use high-performance reactive power compensation device.
  • Compensate the inductive reactive power of the load reduce the transmission of reactive power on the line, reduce the active power loss and voltage drop on the transmission and distribution equipment, and improve the transmission and distribution capacity of the system.
  • the Static Synchronous Compensator (STATCOM) has a very broad application prospect and huge market potential.
  • the reactive power compensation devices in the prior art are all DC voltages and are converted into three-phase alternating currents and sent to the power grid through the transformers.
  • the transformers are designed in such a way that the equipment investment is large, the land occupation is high, the cost is high, and the production cycle is long. Summary of the invention
  • the object of the present invention is to provide a transformerless STATCOM topology based on MMC, which does not require a conventional STATCOM grid-side transformer, thereby achieving cost reduction, space saving, and simple structure.
  • a MMC-based transformerless STATCOM topology characterized by three-phase, each phase consisting of a plurality of modular multilevel converte modular multi-level inverters of standard power units connected in series, after being connected in series with standard power units One end is connected together, and the other end is connected to the inductor; the inductor is connected to the charging resistor, and the charging resistor is connected in parallel with one switch, and then connected to the grid through another switch.
  • the standard power unit is a half bridge structure, two IGBTs are connected in series, and then a DC capacitor is connected in parallel.
  • the standard power unit is powered by a charging resistor and a capacitor to provide a DC side voltage of a standard power unit.
  • each power unit has only two IGBTs, which greatly reduces the unit volume and cost.
  • Figure 1 is a topology diagram of a transformerless STATCOM based on MMC
  • Figure 2 is a structural diagram of a standard power unit
  • Figure 3-1 is a current flow diagram of the power unit output state being 0 state
  • Figure 3-2 is a current flow diagram of the power unit output state being 0 state
  • Figure 4-1 is a current flow diagram of the power unit output state being 1 state
  • Figure 4-2 is a current flow diagram in which the power unit output state is 1. detailed description
  • a MMC-based transformerless STATCOM topology consisting of three phases with a star connection.
  • Each phase consists of a series of standard power units of n modular multilevel converte modular multilevel inverters.
  • the standard power units connected in series are connected at one end and the other end is connected to the inductor L.
  • the inductor L is connected to the charging resistor R.
  • the standard power unit is powered by a charging resistor R and capacitor C (see Figure 2) to provide a standard power unit DC side voltage.
  • the standard power unit of the inverter consists of two switching device IGBTs and a DC-side capacitor C.
  • the switching devices IGBT1 and IGBT2 are connected in series, and then the DC capacitor C is used, and the switching devices IGBT1 and IGBT2 are connected in parallel.
  • Switching device The common terminal of IGBT1 and IGBT2, the common terminal of capacitor C and IGBT2 is used as the output end of each unit, and is connected to other units.
  • This topology realizes the compensation of reactive power of the grid and improves the quality of the grid by controlling the on and off of the standard power unit switching device. Controlling the gate voltage of the IGBT to turn it on or off allows the cell to have different circuit states.
  • Definition IGBT1 is turned off, IGBT2 is turned on as the 0 state of the cell. At this time, the current can flow in the forward direction of IGBT2 (Fig. 3-1), or it can flow backward through the parallel diode D2 (Fig. 3-2).
  • Definition IGBT1 is turned on, IGBT2 is turned off as the unit's 1 state, current can flow through diode D1 (Fig. 4-1), at this time the capacitor is charged; it can also flow through IGBT1 (Fig. 4-2), at which point the capacitor discharges.
  • This topology utilizes MMC power units in series, eliminating the need for transformers to be directly incorporated into the grid, eliminating the need for transformers and associated fans, high voltage cables, auxiliary circuits and load transformers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne une structure topologique de compensateur synchrone statique sans transformateur (STATCOM, Static Synchronous Compensator) à base de convertisseur modulaire à niveaux multiples (MMC, Modular Multilevel Converter) comprenant trois phases qui sont composées de multiples générateurs électriques classiques comprenant des convertisseurs à niveaux multiples modulaires connectés en série. Des premières extrémités de générateurs électriques classiques connectés en série sont connectées les unes aux autres alors que les autres extrémités sont connectées à des inductances. L'inductance est connectée à une résistance de charge. La résistance de charge est connectée à un commutateur en parallèle et est connectée à un réseau électrique au travers d'un autre commutateur. Le générateur électrique classique est alimenté en courant par une résistance de charge et un condensateur afin de fournir une tension continue. La structure topologique STATCOM ne comporte pas de transformateur du côté synchronisation d'un STATCOM classique, cela simplifiant la structure topologique du STATCOM, réduisant l'espace nécessaire au logement de la structure topologique STATCOM ainsi que les coûts.
PCT/CN2011/076850 2010-07-22 2011-07-05 Structure topologique de compensateur synchrone statique sans transformateur (statcom) à base de convertisseur modulaire à niveaux multiples (mmc) WO2012010053A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2010102337134A CN102013685A (zh) 2010-07-22 2010-07-22 一种基于mmc的无变压器statcom拓扑结构
CN201010233713.4 2010-07-22

Publications (1)

Publication Number Publication Date
WO2012010053A1 true WO2012010053A1 (fr) 2012-01-26

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PCT/CN2011/076850 WO2012010053A1 (fr) 2010-07-22 2011-07-05 Structure topologique de compensateur synchrone statique sans transformateur (statcom) à base de convertisseur modulaire à niveaux multiples (mmc)

Country Status (2)

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CN (1) CN102013685A (fr)
WO (1) WO2012010053A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9318974B2 (en) 2014-03-26 2016-04-19 Solaredge Technologies Ltd. Multi-level inverter with flying capacitor topology
US9515568B2 (en) 2014-03-28 2016-12-06 General Electric Company Power converter with a first string having diodes and a second string having switching units
US9941813B2 (en) 2013-03-14 2018-04-10 Solaredge Technologies Ltd. High frequency multi-level inverter
US11159354B2 (en) * 2017-05-12 2021-10-26 Qualcomm Incorporated Increasing reference signal density in wireless communications

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102013685A (zh) * 2010-07-22 2011-04-13 荣信电力电子股份有限公司 一种基于mmc的无变压器statcom拓扑结构
CN102364849A (zh) * 2011-09-05 2012-02-29 江苏南自通华电气集团有限公司 链式无功发生器中功率单元的两级降压式控制电源
CN103390896B (zh) * 2012-05-09 2015-11-25 华锐风电科技(集团)股份有限公司 混合级联多电平静止同步补偿装置和风电机组供电系统
CN102832841B (zh) * 2012-08-27 2014-09-17 清华大学 一种带辅助二极管模块化多电平变换器
CN102946114B (zh) * 2012-10-23 2015-06-03 南京南瑞继保电气有限公司 一种柔性直流输电系统的换流器充电方法
US9240706B2 (en) * 2013-03-08 2016-01-19 Abb Technology Ag Alternating current (AC) synchronization for load restoration
CN103560687B (zh) * 2013-09-27 2016-05-18 株洲变流技术国家工程研究中心有限公司 模块化多电平变流器系统，及其控制系统和控制方法
CN104092239B (zh) * 2014-06-25 2017-02-15 国家电网公司 一种基于模块化多电平换流器的光伏并网控制方法
CN106208396B (zh) * 2016-08-01 2019-05-31 浙江大学 一种基于mmc拓扑的分散式混合储能与电力补偿系统
CN108092520A (zh) * 2016-11-14 2018-05-29 江苏同芯电气科技有限公司 一种基于单充电回路的h桥串并联快控电源系统

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US11545912B2 (en) 2013-03-14 2023-01-03 Solaredge Technologies Ltd. High frequency multi-level inverter
US11742777B2 (en) 2013-03-14 2023-08-29 Solaredge Technologies Ltd. High frequency multi-level inverter
US9941813B2 (en) 2013-03-14 2018-04-10 Solaredge Technologies Ltd. High frequency multi-level inverter
US10404154B2 (en) 2014-03-26 2019-09-03 Solaredge Technologies Ltd Multi-level inverter with flying capacitor topology
US9318974B2 (en) 2014-03-26 2016-04-19 Solaredge Technologies Ltd. Multi-level inverter with flying capacitor topology
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US9515568B2 (en) 2014-03-28 2016-12-06 General Electric Company Power converter with a first string having diodes and a second string having switching units
US11159354B2 (en) * 2017-05-12 2021-10-26 Qualcomm Incorporated Increasing reference signal density in wireless communications

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