CN112421600A - 一种高灵活性户用直流供电系统及其供电方法 - Google Patents

一种高灵活性户用直流供电系统及其供电方法 Download PDF

Info

Publication number
CN112421600A
CN112421600A CN202011122625.7A CN202011122625A CN112421600A CN 112421600 A CN112421600 A CN 112421600A CN 202011122625 A CN202011122625 A CN 202011122625A CN 112421600 A CN112421600 A CN 112421600A
Authority
CN
China
Prior art keywords
direct
current
power supply
converter
photovoltaic
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
CN202011122625.7A
Other languages
English (en)
Inventor
马慧卓
马涛
张锐
张禹森
祁天星
严建海
李忠
李永恒
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.)
Nanjing Guochen Direct Current Distribution Technology Co ltd
Xiongan New Area Power Supply Company State Grid Hebei Electric Power Co
State Grid Corp of China SGCC
Original Assignee
Nanjing Guochen Direct Current Distribution Technology Co ltd
Xiongan New Area Power Supply Company State Grid Hebei Electric Power Co
State Grid Corp of China SGCC
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 Nanjing Guochen Direct Current Distribution Technology Co ltd, Xiongan New Area Power Supply Company State Grid Hebei Electric Power Co, State Grid Corp of China SGCC filed Critical Nanjing Guochen Direct Current Distribution Technology Co ltd
Priority to CN202011122625.7A priority Critical patent/CN112421600A/zh
Publication of CN112421600A publication Critical patent/CN112421600A/zh
Pending legal-status Critical Current

Links

Images

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
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/08—Three-wire systems; Systems having more than three wires
    • H02J1/082—Plural DC voltage, e.g. DC supply voltage with at least two different DC voltage levels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
    • 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
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/14—Balancing the load in a network
    • 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
    • H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
    • H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
    • 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
    • H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

本发明公开了一种高灵活性户用直流供电系统，包括交流电网以及通过交直流双向变换器与交流电网连接的直流纳网；其中，直流纳网采用两级直流母线，分别为375V直流母线和220V直流母线；还包括至少一种新型发电设备，各新型发电设备分别通过对应的变换器或直接与375V直流母线连接，375V直流母线通过降压变换器与220V直流母线连接，220V直流母线给户用直流设备供电。本发明还公开了上述高灵活性户用直流供电系统的供电方法。本发明直流供电系统采用直流纳网形式形成户用供电方案，一方面户用直流母线采用两级直流母线进行供电，另一方面将新型发电设备直接与户用直流母线连接，有效提高了电能的利用率。

Description

一种高灵活性户用直流供电系统及其供电方法
技术领域
本发明涉及一种高灵活性户用直流供电系统，还涉及上述直流供电系统的供电方法。
背景技术
家用供电系统多采用交流供电，同一地区由于类似的外界环境，用户趋同的用电习惯在不同时段内易产生较大用电峰谷差，造成电力系统的波动。随着新能源技术的发展，家庭电站及V2G概念的逐步兴起，新能源技术被用来参与削峰填谷。家庭电站目前多采用交流配用电方案，光伏发电经光伏变换器逆变为交流电供负荷使用，多余可以考虑并网，但并网存在电能利用率低、给电网带来干扰从而影响电网电能质量的问题。V2G(Vehicle toGrid)一般通过交流电网经整流和DC/DC变换向电动汽车充电，电动汽车向电网馈电时，逆变上网。但当大量的电动汽车同时接入电网向电网充电会产生谐波、电能损失和变压器过载等问题，影响电网正常运行。
发明内容
发明目的：本发明针对现有技术中利用新型发电设备参与电能的削峰填谷时，由于新型发电设备是通过逆变上网，因此存在并网质量不好，电能利用率低、给电网带来干扰的问题，提供一种高灵活性户用直流供电系统。本发明还提供上述直流供电系统的供电方法。
技术方案：本发明所述的高灵活性户用直流供电系统，包括交流电网以及通过交直流双向变换器与交流电网连接的直流纳网；其中，直流纳网采用两级直流母线，分别为375V直流母线和220V直流母线；还包括至少一种新型发电设备，各新型发电设备分别通过对应的变换器或直接与375V直流母线连接，375V直流母线通过降压变换器与220V直流母线连接，220V直流母线给户用直流设备供电。
其中，所述新型发电设备为光伏发电装置、储能电池以及双向充电桩，其中，光伏发电装置通过光伏变换器与375V直流母线连接，储能电池通过储能变换器与375V直流母线连接，双向充电桩直接与375V直流母线连接。
其中，还包括监控系统以及设置在375V直流母线上的电压检测装置，电压检测装置、交直流双向变换器、光伏变换器、储能变换器以及双向充电桩分别通过通信电缆与监控系统连接。
其中，光伏变换器包括晶闸管SCR，晶闸管SCR接收到驱动信号导通后，光伏阵列开始给电容C1充电，一段时间后并联电容C3、C4、C5两端电压为光伏阵列的输入电压；此时两组IGBT Q1和Q2接收到驱动信号导通，与其对应的两电感L1和L2开始储能，然后两组IGBTQ1和Q2的驱动脉冲断开，则电感L1和L2开始对并联电容C3、C4、C5释放电能，光伏变换器的输出端电压大于光伏阵列输出电压，升压完成。
上述高灵活性户用直流供电系统的供电方法，包括如下步骤：
(1)监控系统通过电压检测装置检测375V直流母线的实时电压，当375V直流母线电压在DC375V～400V之间，判定为光伏发电设备供电充足，在满足负荷用电情况下，多余电量通过储能变换器对储能电池进行充电，此时若双向充电桩接有电动汽车，开启充电桩的充电模式，向电动汽车充电；充电完成关闭储能变换器和双向充电桩的充电功能，此时仍有多余电量则通过交直流双向变换器回馈至交流电网；
(2)当375V直流母线电压在DC350V～375V之间，光伏发电设备供电满足负荷用电，关闭储能变换器和双向充电桩的充电功能；
(3)当375V直流母线电压在DC325V～350V之间，判定为光伏发电设备供电不足，此时储能电池放电，同时开启充电桩的放电功能，将电动汽车的电能馈至直流纳网；
(4)当375V直流母线电压在DC300V～325V之间，判定为光伏发电设备供电以及储能电池供电均不足，开启充电桩的放电功能，将电动汽车的电能馈至直流纳网；
(5)当375V直流母线电压低于DC300V时，判定为光伏发电设备供电以及储能电池供电均不足且电动汽车需充电，开启交直流双向变换器的整流功能，由交流电网给直流纳网供电。
有益效果：本发明直流供电系统采用直流纳网形式形成户用供电方案，一方面户用直流母线采用两级直流母线进行供电，另一方面将新型发电设备直接与户用直流母线连接，即光伏发电装置和储能电池通过直流变换为家用直流负荷供电，提高了供电效率；双向充电桩使得电动汽车直接与直流纳网环节互动，避免了常规V2G谐波、电能损失和变压器过载等问题，同时储能电池和电动汽车可作为互备储能，提高了供电系统运行的灵活性，并且有效提高了电能的利用率；此外，直流纳网采用不接地方式，提高了用户用电的安全性；本发明直流供电系统的供电方法优先使用光伏发电的电能，光伏发电电能充足时，光伏发电多余电量优先为储能电池充电，其次为充电桩充电，储能充满则考虑通过AC/DC双向变换器向交流电网送电；当光伏发电电能不足时，由储能电池进行补充，储能放电到固定限度时，由交流电网整流为直流纳网供电，从而提高了户用直流用电的灵活性，也保证了户用直流用电时电压的稳定性。
附图说明
图1为本发明直流供电系统的系统原理图；
图2为双向充电桩的电路拓扑图；
图3为光伏变换器的电路拓扑图；
图4为光伏发电装置供电充足时的配电原理图；
图5为光伏发电装置供电不充足，采用储能电池供电的配电原理图；
图6为光伏发电装置供电和储能电池供电均不充足，将电动汽车的电能馈至直流纳网的配电原理图；
图7为光伏发电设备供电以及储能电池供电均不足且电动汽车需充电时，采用交流电网给直流母线供电的配电原理图。
具体实施方式
下面结合附图和具体实施例对本发明技术方案作进一步说明。
如图1所示，本发明高灵活性户用直流供电系统，包括交流电网以及通过交直流双向变换器(AC/DC双向变换器)与交流电网连接的直流纳网；其中，直流纳网采用两级直流母线，分别为375V直流母线和220V直流母线；本发明直流供电系统还包括光伏发电装置、储能电池以及双向充电桩(V2N(Vehicle to Nano-grid))，光伏发电装置通过光伏变换器与375V直流母线连接，储能电池通过储能变换器与375V直流母线连接，双向充电桩直接与375V直流母线连接，375V直流母线通过降压变换器与220V直流母线连接，220V直流母线给户用直流负荷及直流照明供电。
本发明直流供电系统还包括监控系统以及设置在375V直流母线上的电压检测装置，电压检测装置、交直流双向变换器、光伏变换器、储能变换器以及双向充电桩分别通过通信电缆与监控系统连接。
如图2所示，双向充电桩根据充放电指令以及电动汽车的电池SOC状态(State ofcharge，即荷电状态，用来反映电池的剩余容量)来决定双向变换器能量传输的方向(即导通高压侧晶闸管SCR还是低压侧晶闸管SCR)，使其工作在Buck、Boost这两种工作模式，以此来控制电动汽车的充放电。电能由高压侧传输至低压侧为BUCK模式，此模式下，通过充电桩为电动汽车充电；电能由低压侧传输至高压侧为BOOST模式，此模式下，电动汽车通过充电桩向直流母线放电，用以稳定母线电压。
如图3所示，光伏变换器具备MPPT功能，晶闸管SCR接收到驱动信号导通后，光伏阵列开始给电容C1充电，充电一段时间后并联电容C3、C4、C5两端电压约等于光伏输入电压。若此时IGBT Q1接收到驱动信号开通后，电流流过电感L1，电感L1开始储能，受控的IGBT Q2开通后效果同上，O1、Q2同时开通则两电感L1和L2同时开始储能，若给两组IGBT Q1和Q2的驱动脉冲断开，则电感L1和L2开始对并联电容C3、C4、C5释放能量，则并联电容两端电压即光伏变换器的输出端电压大于光伏阵列输出电压，升压完成。反复高频率地开关Q1和Q2，则光伏变换器能持续的给直流母线输送稳定电压。图中C2、C6则为滤波电容，LEM是霍尔电流传感器，用以检测电流。
如图4～7所示，分别对应(a)、(b)、(c)、(d)四种模式。(a)在光伏充足时，光伏发电按三级优先级供直流纳网系统使用：(i)首先保证直流负荷的供电，(ii)满足负荷供电情况下，多余电量对储能单元及电动汽车进行充电，(iii)最后将多余电量通过双向AC/DC回馈至交流电网；(b)光伏不足，且储能有电时，由储能发电供直流纳网使用，还可配合电动汽车馈电至直流纳网；(c)光伏及储能均不足时，电动汽车可供直流纳网使用；(d)光伏及储能均不足且电动汽车电量需充电时，由电网经整流供直流纳网使用。
本发明高灵活性户用直流供电系统采用电压带控制，电压检测单元实时检测DC375V母线电压，送至监控系统，并通过监控系统和变换器之间通信实现变换器之间的协调控制：
(1)当DC375V母线电压在DC375V～400V之间，判定光伏充足，开启储能充电模块，执行(a)-(ii)模式，若充电完成则关闭充电模块，执行(a)-(iii)模式；
(2)当DC375V母线电压在DC350V～375V之间，执行(a)-(i)模式，并关闭储能和充电桩充电功能；
(3)当DC375V母线电压在DC325V～350V之间，判定为光伏不足，开启储能及充电桩的放电功能，执行(b)模式；
(4)当DC375V母线电压在DC300V～325V之间，判定为光伏及储能均不足，开启充电桩的放电功能，执行(c)模式；
(5)当DC375V母线电压低于DC300V时，开启交直流双向变换器的整流功能，执行(d)模式。

Claims (5)

1.一种高灵活性户用直流供电系统，其特征在于：包括交流电网以及通过交直流双向变换器与交流电网连接的直流纳网；其中，直流纳网采用两级直流母线，分别为375V直流母线和220V直流母线；还包括至少一种新型发电设备，各新型发电设备分别通过对应的变换器或直接与375V直流母线连接，375V直流母线通过降压变换器与220V直流母线连接，220V直流母线给户用直流设备供电。
2.根据权利要求1所述的高灵活性户用直流供电系统，其特征在于：所述新型发电设备为光伏发电装置、储能电池以及双向充电桩，其中，光伏发电装置通过光伏变换器与375V直流母线连接，储能电池通过储能变换器与375V直流母线连接，双向充电桩直接与375V直流母线连接。
3.根据权利要求1所述的高灵活性户用直流供电系统，其特征在于：还包括监控系统以及设置在375V直流母线上的电压检测装置，电压检测装置、交直流双向变换器、光伏变换器、储能变换器以及双向充电桩分别通过通信电缆与监控系统连接。
4.根据权利要求2所述的高灵活性户用直流供电系统，其特征在于：光伏变换器包括晶闸管SCR，晶闸管SCR接收到驱动信号导通后，光伏阵列开始给电容C1充电，一段时间后并联电容C3、C4、C5两端电压为光伏阵列的输入电压；此时两组IGBT Q1和Q2接收到驱动信号导通，与其对应的两电感L1和L2开始储能，然后两组IGBT Q1和Q2的驱动脉冲断开，则电感L1和L2开始对并联电容C3、C4、C5释放电能，光伏变换器的输出端电压大于光伏阵列输出电压，完成升压。
5.权利要求1所述的高灵活性户用直流供电系统的供电方法，其特征在于，包括如下步骤：
(1)监控系统通过电压检测装置检测375V直流母线的实时电压，当375V直流母线电压在DC375V～400V之间，判定为光伏发电设备供电充足，在满足负荷用电情况下，多余电量监控系统通过储能变换器对储能电池进行充电，此时若双向充电桩接有电动汽车，开启充电桩的充电模式，向电动汽车充电；充电完成关闭储能变换器和双向充电桩的充电功能，此时仍有多余电量则通过交直流双向变换器回馈至交流电网；
(2)当375V直流母线电压在DC350V～375V之间，光伏发电设备供电满足负荷用电，关闭储能变换器和双向充电桩的充电功能；
(3)当375V直流母线电压在DC325V～350V之间，判定为光伏发电设备供电不足，此时储能电池放电，同时开启充电桩的放电功能，将电动汽车的电能馈至直流纳网；
(4)当375V直流母线电压在DC300V～325V之间，判定为光伏发电设备供电以及储能电池供电均不足，开启充电桩的放电功能，将电动汽车的电能馈至直流纳网；
(5)当375V直流母线电压低于DC300V时，判定为光伏发电设备供电以及储能电池供电均不足且电动汽车需充电，开启交直流双向变换器的整流功能，由交流电网整流供直流纳网使用。
CN202011122625.7A 2020-10-21 2020-10-21 一种高灵活性户用直流供电系统及其供电方法 Pending CN112421600A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011122625.7A CN112421600A (zh) 2020-10-21 2020-10-21 一种高灵活性户用直流供电系统及其供电方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011122625.7A CN112421600A (zh) 2020-10-21 2020-10-21 一种高灵活性户用直流供电系统及其供电方法

Publications (1)

Publication Number Publication Date
CN112421600A true CN112421600A (zh) 2021-02-26

Family

ID=74840930

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011122625.7A Pending CN112421600A (zh) 2020-10-21 2020-10-21 一种高灵活性户用直流供电系统及其供电方法

Country Status (1)

Country Link
CN (1) CN112421600A (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113437743A (zh) * 2021-05-18 2021-09-24 深圳供电局有限公司 供电系统
CN114094644A (zh) * 2021-10-22 2022-02-25 上海电力大学 一种光储充换一体化微电网系统
CN114290909A (zh) * 2022-01-10 2022-04-08 浙江吉利控股集团有限公司 一种新能源电动汽车太阳能发电装置及其控制方法
CN116632986A (zh) * 2023-07-26 2023-08-22 广东天枢新能源科技有限公司 一种直流储充系统及其充电控制方法

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113437743A (zh) * 2021-05-18 2021-09-24 深圳供电局有限公司 供电系统
CN113437743B (zh) * 2021-05-18 2023-08-25 深圳供电局有限公司 供电系统
CN114094644A (zh) * 2021-10-22 2022-02-25 上海电力大学 一种光储充换一体化微电网系统
CN114290909A (zh) * 2022-01-10 2022-04-08 浙江吉利控股集团有限公司 一种新能源电动汽车太阳能发电装置及其控制方法
CN116632986A (zh) * 2023-07-26 2023-08-22 广东天枢新能源科技有限公司 一种直流储充系统及其充电控制方法
CN116632986B (zh) * 2023-07-26 2024-04-16 广东天枢新能源科技有限公司 一种直流储充系统及其充电控制方法

Similar Documents

Publication Publication Date Title
CN109687722B (zh) 一种电动汽车用集成多模式功率转换器及其控制方法
CN112421600A (zh) 一种高灵活性户用直流供电系统及其供电方法
CN102969932B (zh) 一种多功能电流型双向ac/dc变流器及其控制方法
CN205610313U (zh) 一种双向储能逆变系统
JP5290349B2 (ja) 直流給電システムおよびその制御方法
US20090086520A1 (en) Grid-Connected Power Conditioner and Grid-Connected Power Supply System
CN106961150B (zh) 复合储能电池的控制方法及系统
CN201550026U (zh) 太阳能专用光伏控制逆变器
CN111231730B (zh) 一种充电桩充放电控制方法及系统
CN208386212U (zh) 一种不间断电源
CN209805420U (zh) 一种高兼容性楼宇直流配电系统
CN212921195U (zh) 新能源移动储能箱的供电系统
CN217824288U (zh) 一种具有储能装置的光伏离并网系统
Muthuraman et al. A high power EV charger based on modified bridgeless LUO converter for electric vehicle
CN104682443A (zh) 一种基于光伏发电功能的v2g系统
CN111231713A (zh) 一种电动汽车充放电系统及控制方法
CN101593985A (zh) 一种自发电的充电装置
Ramanathan et al. Design of mono stage bridgeless converter for light electric vehicles charging
CN214798998U (zh) 一种带有高频隔离功能的储能装置
CN108089687B (zh) 一种数据中心高效式供电系统
CN209516951U (zh) 一种电动汽车用集成多模式功率转换器
CN215378453U (zh) 一种户用直流供电系统
CN215322084U (zh) 一种储能式直流充电桩
CN114884109A (zh) 一种包括内部供电级联型功率模块的储能系统启机方法
CN206850503U (zh) 一种用于agv的低电压大电流高效无线充电装置

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20210226

WD01 Invention patent application deemed withdrawn after publication