CN102025165A - 一种无变压器电池储能拓扑结构 - Google Patents

一种无变压器电池储能拓扑结构 Download PDF

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CN102025165A
CN102025165A CN2010102340705A CN201010234070A CN102025165A CN 102025165 A CN102025165 A CN 102025165A CN 2010102340705 A CN2010102340705 A CN 2010102340705A CN 201010234070 A CN201010234070 A CN 201010234070A CN 102025165 A CN102025165 A CN 102025165A
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battery energy
topological structure
energy storage
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魏西平
杨洋
赵淑玉
张坤
张跃平
胡涛
李太峰
王振
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Rongxin Power Electronic Co Ltd
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Priority to PCT/CN2011/076861 priority patent/WO2012010056A1/zh
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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
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy
    • 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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

本发明涉及一种无变压器电池储能拓扑结构，该拓扑结构包括三相，每相由多个H桥功率模块与电池储能模块构成的子单元串联在一起，经缓冲电感接入电网。所述的H桥功率模块由四个IGBT开关器件组成，每个IGBT开关器件反并联一个二极管，每两个IGBT开关器件相串联后，再与直流电容C并联。所述的电池储能模块由电池组与开关串联而成，再与H桥功率模块的电容并联。所述的开关还并联有电阻。该拓扑并联在电网上，可抑制电网的那些电力污染，可补偿光伏或风能发电的不稳定性，给电网上的负载提供不间断、干净、稳定、无频率突变、高质量的正弦波电压。

Description

一种无变压器电池储能拓扑结构
技术领域
本发明涉及一种无变压器电池储能拓扑结构，用于高压电力系统领域，使电网供给负载可靠，高质量的电压。
背景技术
目前，电网至少存在以下九种问题：断电、雷击尖峰、浪涌、频率震荡、电压突变、电压波动、频率漂移、电压跌落、脉冲干扰等。可再生能源例如光伏或风能所产生的电能也极其的不稳定，新能源并网应用的规模越大，电网就越不安全，根据国内外风光电站并网的实践，借助储能技术可以实现新能源发电功率的平衡输出，使大规模风电及太阳能电力方便可靠地并入常规电网。
目前电力储能设备都是通过变压器与电网相并联的，采用变压器，使设备投资大、占地多，成本高，生产周期长。
发明内容
本发明的目的是提供一种无变压器电池储能拓扑，其并联在电网上，可抑制电网的那些电力污染，可补偿光伏或风能发电的不稳定性，给电网上的负载提供不间断、干净、稳定、无频率突变、高质量的正弦波电压。
为实现上述目的，本发明通过以下技术方案实现：
一种无变压器电池储能拓扑结构，该拓扑结构包括三相，每相由多个H桥功率模块与电池储能模块构成的子单元串联在一起，经缓冲电感接入电网。
所述的H桥功率模块由四个IGBT开关器件组成，每个IGBT开关器件反并联一个二极管，每两个IGBT开关器件相串联后，再与直流电容C并联。
所述的电池储能模块由电池组与开关串联而成，再与H桥功率模块的电容并联。所述的开关还并联有电阻。
与现有技术相比，本发明的有益效果是：
1)输入端无变压器，进而使该电池储能拓扑装置与同电压、功率等级下的有变压器的相比较，生产周期减小一半，体积减小一半，成本降低一半，占地面积减小一半，运输方便，结构简单；
2)电池储能具有能量效率高，可实现快速充放电，寿命长。
3)减小或提高容量等级比较简单，只需减少或增多串联的单元数目即可。
附图说明
图1是无变压器电池储能拓扑结构图；
图2是无变压器电池储能拓扑基本单元结构图。
具体实施方式
见图1，一种无变压器电池储能拓扑结构，该拓扑结构包括三相，每相由多个H桥功率模块与电池储能模块构成的子单元串联在一起，经缓冲电感L接入电网。电感L还连接缓冲电阻R，缓冲电阻R与开关K2并联后，与断路器K1连接。
见图2，H桥功率模块由IGBT1、IGBT2、IGBT3、IGBT4四个开关器件组成，开关器件IGBT1和IGBT2相串联，开关器件IGBT3和IGBT4相串联，再和直流电容C并联。并且四个开关器件IGBT1、IGBT2、IGBT3、IGBT4分别并联一个反接二极管D1、D2、D3、D4。IGBT1与IGBT2的公共端、IGBT3与IGBT4的公共端为该功率模块与其它功率模块相连接的输入、输出端。
电池储能模块由电池组E与开关S串联而成，再与H桥功率模块的电容C并联，开关S还并联有电阻R′。
当电网输出电压不正常时，图1采用多功率单元串联输出高压，通过调制算法输出多电平波形，产生高质量的正弦波电压供给电网上的负载。
当电网电压产生尖峰时，电压通过二极管向直流侧供电，开通每个单元(如图2所示)的开关S，此时，本发明的电池储能拓扑直流侧电容和电池吸收电网尖峰，进而抑制了电网尖峰对电网上设备的影响。当电网电压突然跌落或中断时，通过控制每个单元(如图2所示)的IGBT1～IGBT4，开通S，此时，直流侧电容和电池中的能量回馈电网，使电网输出正常的正弦波。当电网电压正常时，关断IGBT1～IGBT4，关断开关S，此时，能量储存在电池中。
本发明的电池储能拓扑可为1～500KV的电网做储备电源，可抑制风力发电或光伏发电的不稳定性，其重要特征为输入端无变压器，体积小，成本低。该电池储能拓扑通过单元串联的方法，输出高压，省掉了并网时所用的升压变压器，节约了大量成本且拓扑结构简单，易于拆卸和安装。所述的单元为H桥型模块包括四个IGBT器件，每两个构成一个桥，每个模块还包括直流滤波电容以及与电容相并联的电池。当需要提高电压等级时，只需要提高串联的单元数目即可。另外，由于采用多单元串联功率单元输出高压，可以通过调制算法输出多电平波形，产生高质量的正弦波电压。
所述的H桥功率模块包括四个IGBT器件，其构成了一个可整流可逆变的桥，后面的开关S控制电池吸收或释放电能。当开关S为高速可关断器件，如IGBT时，还可省掉与其相并联的电阻。
本发明根据实际需要提高或减小容量比较简单，只需增多或减少单元数目即可。

Claims (4)

1.一种无变压器电池储能拓扑结构，其特征在于，该拓扑结构包括三相，每相由多个H桥功率模块与电池储能模块构成的子单元串联在一起，经缓冲电感接入电网。
2.根据权利要求1所述的无变压器电池储能拓扑结构，其特征在于，所述的H桥功率模块由四个IGBT开关器件组成，每个IGBT开关器件反并联一个二极管，每两个IGBT开关器件相串联后，再与直流电容C并联。
3.根据权利要求1或2所述的无变压器电池储能拓扑结构，其特征在于，所述的电池储能模块由电池组与开关串联而成，再与H桥功率模块的电容并联。
4.根据权利要求3所述的无变压器电池储能拓扑结构，其特征在于，所述的开关还并联有电阻。
CN2010102340705A 2010-07-22 2010-07-22 一种无变压器电池储能拓扑结构 Pending CN102025165A (zh)

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CN102355065A (zh) * 2011-09-28 2012-02-15 上海交通大学 一种模块化中压储能系统
CN104022499A (zh) * 2014-06-12 2014-09-03 国家电网公司 一种多端口背靠背直流-直流变换器
CN104167738A (zh) * 2014-07-09 2014-11-26 中国神华能源股份有限公司 电能质量治理和储能一体化节能装置及其控制方法
US11545833B2 (en) * 2019-11-21 2023-01-03 Shanghai Jiao Tong University High-voltage hierarchy hundred-megawatt level battery energy storage system

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Application publication date: 20110420