CN103872701A - Energy-storage type alternating current and direct current mixed micro-grid and control method thereof - Google Patents

Energy-storage type alternating current and direct current mixed micro-grid and control method thereof Download PDF

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CN103872701A
CN103872701A CN 201310725386 CN201310725386A CN103872701A CN 103872701 A CN103872701 A CN 103872701A CN 201310725386 CN201310725386 CN 201310725386 CN 201310725386 A CN201310725386 A CN 201310725386A CN 103872701 A CN103872701 A CN 103872701A
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dc
ac
piconet
power
converter
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CN 201310725386
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CN103872701B (en )
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刘飞
文锋
阮旭松
余祖俊
李少林
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惠州市亿能电子有限公司
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    • 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
    • Y02E40/10Flexible AC transmission systems [FACTS]

Abstract

The invention discloses an energy-storage type alternating current and direct current mixed micro-grid and a control method thereof. The energy-storage type alternating current and direct current mixed micro-grid comprises an alternating current micro-grid, a direct current micro-grid, a battery energy-storage system and an energy management system EMS, which are connected with an external grid control center. The control method of the energy-storage type alternating current and direct current mixed micro-grid comprises the following steps of initializing the EMS to acquire information data of the alternating current micro-grid, the direct current micro-grid and the battery energy-storage system; acquiring information data of an external public grid in real time; regulating and controlling the alternating current micro-grid, the direct current micro-grid and the battery energy-storage system according to the acquired data. The energy-storage type alternating current and direct current mixed micro-grid and the control method thereof have the advantages that the energy utilization efficiency can be improved, the size of a transformer can be reduced, networking and controlling are more flexible, the cost is reduced, and the power supply reliability of the whole system is improved.

Description

一种储能型交直流混合微网及其控制方法 An energy storage type of AC and DC and a control method piconet

技术领域 FIELD

[0001] 本发明涉及一种储能型交直流混合微网及其控制方法。 [0001] The present invention relates to an energy storage type of AC and DC piconet and a control method.

背景技术 Background technique

[0002]目前,无论是在大型供电系统还是其它微网系统中,主要是交流微网或者是直流微网的单一微网系统。 [0002] Currently, a large power supply system both in the piconet, or other systems, mainly single piconet exchange system network or direct current micro-piconet. 对于单一的微网系统,存在这多方面的不足:越来越多的用电设备需要直流供电,通过交流电网转换为直流与直流转换为直流相比,不仅变换器设备体积大,成本高,而且交流转换效率低,能量损失严重;单一交流或直流微网,功率转换设备多,体积大,系统供电可靠性低;同时随着对节能环保的日益重视,太阳能分布式发电、电梯节能能量回收系统等都输出直流电能,需要方便可再生能源的灵活接入;另外大多数的微网系统控制及管理简单,没有一套有效的能量控制方法充分考虑系统的能源利用效率。 For a single piconet system, the presence of these many disadvantages: the electrical equipment requires more DC power supply, compared to the DC-DC converter and a DC power by the AC converter, the converter device is not only a large size, high cost, conversion efficiency and low AC energy loss is serious; multiple single piconet AC or DC power conversion apparatus, bulky, low-power system reliability; at the same time with the increasing emphasis on energy saving, the distributed solar power generation, energy recovery elevator energy DC power output system so requires convenient and flexible access to renewable energy; additional most simple system control and manage the piconet, without an effective method of controlling the energy efficiency energy systems considered adequate.

发明内容 SUMMARY

[0003] 为了解决上述问题,本发明提供一种储能型交直流混合微网及其控制方法的设计方案。 [0003] In order to solve the above problems, the present invention provides a storage-type DC microgrid to a hybrid design and control method thereof.

[0004] 一种储能型交直流混合微网,包括交流微网、直流微网和电池储能系统,还包括与交流微网、直流微网和电池储能系统连接的能量管理系统EMS,交流微网与直流微网通过一个或多个双向DC/AC变换器连接,交流微网与直流微网分别通过一个或多个双向AC/DC变换器与一个或多个双向DC/DC变换器与电池储能系统连接;所述能量管理系统EMS还与外部电网控制中心连接。 [0004] An energy storage type of AC and DC piconet, the piconet including AC, DC micro network and battery energy storage system further includes an energy management system (EMS) connected to an AC piconet, and piconet DC battery energy storage system, AC and DC piconet piconet over one or more bidirectional DC / AC inverter connected to the DC AC piconet piconet, respectively, via one or more bi-directional AC / DC converter with one or more bi-directional DC / DC converter connected to the battery energy storage system; the energy management system (EMS) is also connected to an external grid control center.

[0005] 所述交流微网包括交流母线,连接到交流母线用于与外部公共电网连接的一个或多个双向AC/AC变换器、用于与外部用电设备(相当于电动汽车以及交流负载等)行能量交换的一个或多个双向AC/DC变换器、用于连接其他交流发电系统的一个或多个AC/AC变换器。 [0005] The piconet includes alternating AC bus connected to the AC bus for one or more two-way connected to an external utility grid AC / AC converter, with an external electric apparatus (corresponding to an electric vehicle, and AC load etc.) one or more rows of energy exchange bidirectional AC / DC converter, the AC power generating system for connecting other of the one or more AC / AC converter.

[0006] 所述直流微网包括直流母线,连接到直流母线用于连接其他直流发电系统的一个或多个DC/DC变换器、用于连接外部用电设备(相当于电动汽车以及直负载等)的一个或多个双向DC/DC变换器及一个或多个DC/DC变换器。 [0006] The piconet includes a DC bus current, a DC bus connected to a DC power generation system is connected to other one or more DC / DC converter, for connecting external electrical equipment (corresponding to an electric vehicle and a linear load, etc. ) one or more bi-directional DC / DC converter, and one or more DC / DC converter.

[0007] 能量管理系统EMS包括主控单元,与直流微网连接的直流微网监控单元、与交流微网连接的交流微网监控单元和与电池储能系统连接的电池管理单元;所述直流微网监控单元、交流微网监控单元及电池管理单元均与主控单元连接。 [0007] The energy management system (EMS) includes a main control unit, a DC micro-current network monitoring unit connected to the piconet, the piconet exchange monitoring unit connected to the AC network and the micro-cell management unit connected to the battery energy storage system; said DC piconet monitoring unit, the monitoring unit exchanges piconet and a battery management unit are connected to the main control unit. 所述直流微网监控单元与交流微网监控单元通过通信总线分别与直流微网和交流微网的各个变换器连接;所述交流微网监控单元与连接交流微网和直流微网的各个变换器连接;所述电池管理单元通过一个或多个双向DC/DC变换器以及一个或多个的双向AC/DC变换器分别于与直流微网和交流微网连接。 The current monitoring unit piconet and communication monitoring unit connected to the piconet, respectively via the communication bus network and the respective alternating current micro inverter piconet; piconet respective transform the alternating monitoring unit connected AC and DC microgrid piconet connection; the battery management unit via one or more bidirectional DC / DC converter, and one or more of the bidirectional AC / DC converter connected to a DC to AC piconet and the piconet, respectively.

[0008] 所述直流微网监控单元与交流微网监控单元通过通信总线分别与直流微网和交流微网的各个变换器连接;所述交流微网监控单元与连接交流微网和直流微网的各个变换器连接。 [0008] The DC piconet exchange unit connected to the monitoring unit to monitor communication bus piconet respectively respective DC converter and the AC piconet piconet; the control unit and alternating piconet network connecting the AC and DC micro-piconet each converter is connected.

[0009] 一种储能型交直流混合微网的控制方法,包括以下步骤:(1)能量管理系统EMS初始化;(2)能量管理系统EMS获取交流微网、直流微网发以及电池储能系统蓄电池储能系统的信息数据;(3)能量管理系统EMS实时获取外部公共电网的信息数据;(4)根据上述获取到的数据进行对交流微网、直流微网发以及电池储能系统进行调控。 [0009] The control method of a hybrid energy storage type DC piconet, comprising the steps of: (1) the energy management system (EMS) initialization; (2) the energy management system (EMS) acquires piconet AC, DC micro network development and BESS information data system battery energy storage system; (3) the energy management system (EMS) to obtain information in real-time data of the external utility grid; (4) AC piconet, the piconet DC battery energy storage system and send acquired data according to the above-described regulation.

[0010] 步骤(2)所述的信息数据包括:(I)交流微网、直流微网、电池储能系统以及外部公共电网的负荷状态;(II)交流微网、直流微网中发电系统的发电功率,电池储能系统当前剩余功率。 Information data (2), wherein [0010] comprising the step of: (I) AC piconet, the piconet current, battery energy storage system and the load state of the external utility grid; (II) exchange piconet, the piconet DC generation system the available power of the generated power, battery energy storage system. 步骤(3)所述的信息数据包括:外部公共电网负荷预测曲线,电动汽车充电预测曲线以及交直流微网中的发电系统发电功率预测曲线。 Step (3) The information data comprises: an external load prediction curve public grid, electric vehicle charging prediction curve and a power generation system DC power prediction curve in the piconet.

[0011] 所述获取交流微网、直流微网、电池储能系统以及外部公共电网负荷状态的方法为:通过与外部公共电网连接的双向AC/AC变换器的获取当前主节点功率的流动方向及大小;通过连接交流微网和直流微网的各个双向AC/ DC变换器、连接外部用电设备的各个双向AC/DC变换器以及外部用电设备各个双向DC/DC变换器的数据,并根据交流微网从 [0011] The piconet obtaining AC, DC microgrid, battery energy storage systems, and methods common external grid load state is: AC converter acquires the flow direction of the current master node by a bidirectional AC power utility grid connected to the external / each bidirectional data through respective bidirectional AC AC AC connector and the DC microgrid piconet / DC converter, connected to an external electric device / DC converter and an external electrical apparatus each of the bidirectional DC / DC converter, and; and size the AC micro-grid from

节点恒功率控制原则 Principle constant power control node

Figure CN103872701AD00061

与直流微网从节点恒功率控制原则: The DC microgrid node from constant power control principle:

Figure CN103872701AD00062

计算当如交流微网、直流微网和电池储能系统的能量流动方 When the energy flow is calculated as the AC side piconet, the piconet DC battery energy storage system and

向及大小;其中吞0«1为直流负载,Actai为交流负载,为直流发电系统发出功率,Jjcb为交流发电系统发出功率,Ppi!为电网提供功率,为电池储存系统中存储的功率,PKV.txtt为电动汽车电池系统所需功率。 Direction and size; wherein swallow 0 «a DC load, Actai an AC load, issued power of direct current electrical generating system, Jjcb emitted power to AC power system, Ppi supplies power to the grid, the battery storage system is stored in the power, PKV! .txtt electric vehicle battery systems required power.

[0012] 所述步骤(4)的方法为:(41)能量管理系统EMS根据各个预测曲线,判断是否需要将富裕电能回馈外部公共电网;(42)能量管理系统EMS,根据负载大小通过效率最优算法获取最佳功率路径,并根据最佳功率路径调整的各个变换器的组合和负载分配组合。 Method [0012] The step (4) as: (41) the energy management system (EMS) in accordance with the respective prediction curve determines whether external power back rich need a utility grid; (42) the energy management system (EMS), the most efficient according to load size by power optimization algorithm to obtain the best path, and assign the combination and the combination according to the load path of each inverter optimum power adjustment.

[0013] 步骤(41)判断是否需要将富裕电能回馈外部公共电网的方法为:根据各个预测数据计算未来单位时间内直流发电系统的功率能否满电池储能系统的储能要求,若满足则将发送相关指令到相关的双向AC/DC变换器将交流微网的多余电能回馈到外部公共网络;若未来单位时间内直流发电系统的功率不能满足电池储能系统的储能要求,且未来交直流微网内有较大的负载需求,将发送相关指令到相关的双向AC/DC变换器将交流微网多余电能储存在电池系统中。 Method [0013] Step (41) determines whether the external power back to a utility grid FE of: calculating the power in the next unit time of DC power storage system can claim the full battery energy storage system in accordance with various predicted data, is satisfied if the excess power to send the relevant instruction associated bidirectional AC / DC converter AC feedback to the piconet external public network; if the next unit time of DC power generation system can not meet the requirements of the storage battery energy storage systems, and future cross the greater load requirements DC piconet, to send the relevant instructions to the relevant bidirectional AC / DC converter AC piconet excess power stored in the battery system.

[0014] 所述步骤(42)还包括以下步骤:(42a)当能量管理系统EMS检测到直流微网负载功率大于直流微网内直流发电设备的发电功率时,能量管理系统EMS依据最佳功率路径目标函数: [0014] The step (42) further comprises the steps of: (42a) when the energy management system (EMS) detects load power is greater than the DC power piconet DC power within the piconet DC power plant, the energy management system (EMS) according to the optimum power path objective function:

Figure CN103872701AD00063

计算出合理的功率路径。 Calculate a reasonable power path.

[0015] (42b)当能量管理系统EMS检测到交流微网负载功率大于交流微网内交流发电设备的发电功率,且直流微网中直流发电功率小于直流微网中直流负载功率时,能量管理系统EMS依据最佳功率路径目标函数: [0015] (42b) when the energy management system (EMS) detected by the AC piconet load power is greater than the generated power within AC piconet AC power generating apparatus, and DC piconet direct current electrical generating power is less than the DC piconet current load power, energy management EMS power system based on the best path to the target function:

Figure CN103872701AD00071

理的功率路径。 Reasonable power path.

[0016] (42c)当能量管理系统EMS检测到交流微网负载功率大于交流微网内交流发电设备的发电功率,且直流微网中直流发电功率大于直流微网中直流负载功率时,能量管理系统EMS依据最佳功率路径目标函数: [0016] (42c) when the energy management system (EMS) detected by the AC piconet load power is greater than the generated power within AC piconet AC power generating apparatus, and DC piconet direct current electrical generating power is greater than the DC piconet current load power, the energy management EMS power system based on the best path to the target function:

Figure CN103872701AD00072

计算出最佳功率路径。 Calculate the optimal power path.

[0017] 其中,IW60为双向DC/AC变换器正向转换效率函数,为双向DC/AC变换器逆向转换效率函数,为双向AC/DC变换器正向转换效率函数,为AC/DC直流变换器逆向转换效率函数,为双向DC/DC变换器正向转换效率函数, [0017] wherein, IW60 bidirectional DC / AC converter function forward conversion efficiency, bidirectional DC / AC converter inverse conversion efficiency function as a bidirectional AC / DC converter forward conversion efficiency function as AC / DC to DC converter an inverse function of the conversion efficiency, bidirectional DC / DC converter forward conversion efficiency function,

夏)为双向DC/DC变换器逆向转换效率函数,《W»为双向AC/AC变换器正向转换效率函数,巧nul、l) 为双向AC/AC变换器逆向转换效率函数,为单向AC/AC变换器效率函数,为单向DC/DC变换器效率函数。 Summer) inverse conversion efficiency function bidirectional DC / DC converter, "W» bidirectional AC / AC converter forward conversion efficiency function, Qiao nul, l) is a bidirectional AC / AC converter inverse conversion efficiency function for one-way AC / AC converter efficiency function as a unidirectional DC / DC converter efficiency function.

[0018] 综上所述,本发明具有以下有益效果:(I)通过各变换器的模块化、可以灵活接入负载和发电单元,减少交流变换为直流环境,提升能源利用效率,减小变换器的体积,同时,减少无功补偿设备投入,节省成本;(2)交直流微网采用分布式管理,大大提升系统的控制效率,使控制更加灵活;(3)交直流微网采用交直流混合供电,加上电池储能系统,提升整个系统供电的可靠性;(4)和外部公共电网实时通信互动,在必要的时候进行能量存储和输出,可以起到对外部公共电网削峰填谷作用,对平衡整个电网起到积极作用,提高利用效率,降低用电成本;(5)组网灵活,从小到单体建筑大到区域供电,可快速组网。 [0018] In summary, the present invention has the following advantages: (I) each of the modular inverter to be flexible access and load power generation unit, to reduce the AC into a DC environment, improve energy efficiency, reduced conversion 's volume, while reducing reactive power compensation equipment investment cost savings; (2) AC and DC piconet distributed management, greatly enhance the efficiency of the control system, so that more flexible control; (3) microcell using AC DC DC hybrid power supply, battery energy storage system coupled to improve the reliability of the entire system power supply; (4) and the external utility grid interactive real-time communication, storage and energy output when necessary, may serve the public grid external load shaving effect, have a positive effect on the whole power balance, improve efficiency, reduce electricity costs; (5) flexible network, from small to large area single building power, fast networking.

附图说明 BRIEF DESCRIPTION

[0019] 图1为本发明所述一种储能型交直流混合微网的整体结构示意图。 [0019] FIG 1 a schematic view of the overall structure of a storage-type DC-mixing of the one piconet to the present invention.

具体实施方式 detailed description

[0020] 为了让本领域的技术人员能够更好地了解本发明的技术方案,下面结合附图对本发明作进一步的阐述。 [0020] To make those skilled in the art can better understand the technical solutions of the present invention, the accompanying drawings of the present invention will be further illustrated in combination.

[0021] 如图1所示,本发明揭示了一种储能型交直流混合微网,包括交流微网、直流微网和电池储能系统,还包括与交流微网、直流微网和电池储能系统连接的能量管理系统EMS,交流微网与直流微网通过一个或多个双向DC/AC变换器连接,实现能量交换。 [0021] As shown in FIG. 1, the present invention discloses a micro-mixing tank type DC network, including the exchange piconet, and piconet DC battery energy storage system, further comprising a piconet AC, DC micro cell and network the energy management system (EMS) is connected to the energy storage system, the DC piconet exchange piconet over one or more bidirectional DC / AC converter is connected, to achieve energy exchange.

[0022] 交流微网与直流微网分别通过一个或多个双向AC/DC变换器与一个或多个双向DC/DC变换器与电池储能系统连接,可以对电池储能系统进行充放电;能量管理系统EMS还与外部电网控制中心连接。 [0022] AC and DC piconet piconet, respectively, via one or more bi-directional AC / DC converter connected to one or more bidirectional DC / DC converter and the battery energy storage system, can be charged and discharged the battery energy storage system; the energy management system (EMS) is also connected to an external grid control center.

[0023] 交流微网包括交流母线(AC BUS),连接到交流母线用于与外部公共电网连接的一个或多个双向AC/AC变换器、用于与外部用电设备进行能量交换的一个或多个双向AC/DC变换器、用于连接其他交流发电系统的一个或多个AC/AC变换器。 [0023] AC piconet including AC bus (BUS AC), the AC bus connected to one or more two-way connected to an external utility grid AC / AC converter, for energy exchange with the external electrical device or a a plurality of bidirectional AC / DC converter, the AC power generating system for connecting other of the one or more AC / AC converter. 发电系统可以是如油机发电、风力发电等交流发电系统。 The power generation system may be a diesel generator, wind power generation system AC.

[0024] 直流微网包括直流母线(DC BUS),连接到直流母线用于连接其他直流发电系统(如光伏发电系统)的一个或多个DC/DC变换器、用于连接外部用电设备(如外部的负载电器,电动汽车充放电接口及其配套设备等)的一个或多个双向DC/DC变换器及一个或多个DC/DC变换器。 [0024] The piconet includes a DC link current (DC BUS), for connection to a DC bus connected to the other direct current power generation system (e.g., photovoltaic system) or a plurality of DC / DC converter, for connecting external electrical equipment ( as the external load device, the one or more bi-directional DC electric vehicle charging and discharging equipment interfaces and the like) / DC converter, and one or more DC / DC converter.

[0025] 能量管理系统EMS包括主控单元,与直流微网连接的直流微网监控单元、与交流微网连接的交流微网监控单元和与电池储能系统连接的用于负责实时采集电池信息(电压、电流、温度、SOC等信息)的电池管理单元;所述直流微网监控单元、交流微网监控单元及电池管理单元均与主控单元连接。 [0025] The energy management system (EMS) includes a main control unit, a DC micro-current network monitoring unit connected to the piconet, the piconet exchange monitoring unit connected to the AC network and is connected to the micro-cell energy storage system is responsible for the real-time acquisition battery information (voltage, current, temperature, and other information the SOC) of the battery management unit; piconet monitoring unit of the DC, AC and a battery monitoring unit piconet management unit are connected to the main control unit. 所述直流微网监控单元与交流微网监控单元通过通信总线分别与直流微网和交流微网的各个变换器连接;所述交流微网监控单元与连接交流微网和直流微网的各个变换器连接。 The current monitoring unit piconet and communication monitoring unit connected to the piconet, respectively via the communication bus network and the respective alternating current micro inverter piconet; piconet respective transform the alternating monitoring unit connected AC and DC microgrid piconet connection. 所述直流微网监控单元与交流微网监控单元通过通信总线分别与直流微网和交流微网的各个变换器连接;所述交流微网监控单元与连接交流微网和直流微网的各个变换器连接。 The current monitoring unit piconet and communication monitoring unit connected to the piconet, respectively via the communication bus network and the respective alternating current micro inverter piconet; piconet respective transform the alternating monitoring unit connected AC and DC microgrid piconet connection. 直流微网监控单元、交流微网监控单元和电池管理单元均通过通讯总线实现和其他节点(节点包括各个变换器)的数据和信息交换,并通过有线或无线网络和电网中心通信,实现信息传递。 DC micro network monitoring unit, the monitoring unit exchanges piconet and a battery management unit are implemented via the communication bus and the other nodes (nodes each including inverter) of data and exchange of information, and through a wired network and wireless communication or power center, information delivery . 能量管理系统EMS也可通过有线或无线的方式与外部电网控制中心连接,提交或获取相关的数据,如外部公共电网负荷预测曲线等。 The energy management system (EMS) may be connected via a wired or wireless manner to an external grid control center, or submit to capture data, such as an external load forecasting curve public.

[0026] 本发明还揭示了一种储能型交直流混合微网控制方法,包括以下步骤。 [0026] The present invention also discloses a micro-mixing tank type DC network control method, comprising the following steps.

[0027] ( 1)能量管理系统EMS初始化。 [0027] (1) the energy management system (EMS) initialization.

[0028] (2)能量管理系统EMS获取交流微网、直流微网发以及电池储能系统蓄电池储能系统的信息数据;包括:交流微网、直流微网、电池储能系统以及外部公共电网的负荷状态;交流微网、直流微网中发电系统的发电功率,电池储能系统当前剩余功率。 [0028] (2) Energy Management System EMS acquires exchange piconet, the piconet send information data DC battery energy storage system and the battery energy storage system; comprising: AC piconet, the piconet current, battery energy storage system and the external utility grid load condition; AC piconet, the piconet power DC power generation system, the available power of the battery energy storage system.

[0029] 获取交流微网、直流微网、电池储能系统以及外部公共电网负荷状态的方法为:通过与外部公共电网连接的双向AC/AC变换器的获取当前主节点功率的流动方向及大小;通过连接交流微网和直流微网的各个双向AC/ DC变换器、连接外部用电设备的各个双向AC/DC变换器以及外部用电设备各个双向DC/DC变换器的数据,并根据交流微网从 [0029] Gets exchange piconet, the piconet current, battery energy storage system and the load state of the external grid common method: AC inverter current master acquires the flow direction and magnitude of power by a bidirectional AC utility grid connected to the external / ; connected through respective bidirectional AC AC and DC piconet piconet / DC converter, the data of each bidirectional DC / DC converter connected to the respective external electrical equipment bidirectional AC / DC converter and an external electrical apparatus, according to the exchange from the micro network

节点恒功率控制原则: Node constant power control principles:

Figure CN103872701AD00081

,与直流微网从节点恒功率控制原则: , The DC node microgrid from constant power control principle:

Figure CN103872701AD00082

计算当如交流微网、直流微网和电池储能系统的能量流动方 When the energy flow is calculated as the AC side piconet, the piconet DC battery energy storage system and

向及大小;其中PDcmd为直流负载,PAcmd为交流负载,PDcg为直流发电系统发出功率,PAcg为交流发电系统发出功率,Pdid为电网提供功率,Psbat为电池储存系统中存储的功率, And the size; wherein PDcmd DC load, PAcmd an AC load, PDcg emitted power system into DC power, AC power is sent PACG generation system, providing power to the grid PDID, Psbat battery power stored in the storage system,

PmVbat为电动汽车电池系统所需功率。 PmVbat electric vehicle battery systems required power.

[0030] (3)能量管理系统EMS实时(从外部电网控制中心)获取外部公共电网的信息数据,包括:外部公共电网负荷预测曲线,并根据历史统计数据,实时查询电动汽车充电预测曲线以及交直流微网中的发电系统发电功率预测曲线。 [0030] (3) the energy management system (EMS) in real-time access to external utility grid (external grid control center) information data, comprising: an external utility grid load prediction curve, and based on historical statistical data, real-time query electric vehicle charging prediction curve and cross DC power generating power piconet prediction curve.

[0031] (4)根据上述获取到的数据进行对交流微网、直流微网发以及电池储能系统进行调控。 [0031] (4) of the piconet AC, DC micro network development and regulate battery energy storage system according to the acquired data as described above. 能量管理系统EMS根据各个预测曲线,判断是否需要将富裕电能回馈外部公共电网;能量管理系统EMS,根据负载大小通过效率最优算法获取最佳功率路径,并根据最佳功率路径调整的各个变换器的组合和负载分配组合。 The energy management system (EMS) in accordance with the respective prediction curve determines whether external power back to a utility grid FE; energy management system (EMS), for the best path through the power optimization algorithm efficiency according to the load size, and adjusted according to the respective optimal power path converter combinations and load distribution in combination.

[0032] 判断是否需要将富裕电能回馈外部公共电网的方法为:根据各个预测数据计算未来单位时间内直流发电系统的功率能否满电池储能系统的储能要求,若满足则将发送相关指令到相关的双向AC/DC变换器将交流微网的多余电能回馈到外部公共网络;若未来单位时间内直流发电系统的功率不能满足电池储能系统的储能要求,且未来交直流微网内有较大的负载需求,将发送相关指令到相关的双向AC/DC变换器将交流微网多余电能储存在电池系统中。 Method [0032] It is determined whether the rich external utility grid power back to: calculate the respective prediction data storage unit time in the next required power generation system can direct full battery energy storage system according to related commands will be sent if yes Related to the bidirectional AC / DC converter converts excess power back to AC piconet external public network; if the power in the next unit time of DC power storage system can not meet the requirements for battery energy storage system, and the AC-DC micro future network greater load requirements, will send relevant instructions to the relevant bidirectional AC / DC converter AC piconet excess power stored in the battery system.

[0033] (42a)当能量管理系统EMS检测到直流微网负载功率大于直流微网内直流发电设备的发电功率时,能量管理系统EMS依据最佳功率路径目标函数: [0033] (42a) when the energy management system (EMS) detects load power is greater than the DC power piconet DC power within the piconet DC power plant, the energy management system (EMS) according to the optimum path to the target power function:

Figure CN103872701AD00091

计算出合理的功率路径。 Calculate a reasonable power path.

[0034] (42b)当能量管理系统EMS检测到交流微网负载功率大于交流微网内交流发电设备的发电功率,且直流微网中直流发电功率小于直流微网中直流负载功率时,能量管理系统EMS依据最佳功率路径目标函数: [0034] (42b) when the energy management system (EMS) detected by the AC piconet load power is greater than the generated power within AC piconet AC power generating apparatus, and DC piconet direct current electrical generating power is less than the DC piconet current load power, energy management EMS power system based on the best path to the target function:

Figure CN103872701AD00092

计算出合理的功率路径。 Calculate a reasonable power path.

[0035] (42c)当能量管理系统EMS检测到交流微网负载功率大于交流微网内交流发电设备的发电功率,且直流微网中直流发电功率大于直流微网中直流负载功率时,能量管理系统EMS依据最佳功率路径目标函数: [0035] (42c) when the energy management system (EMS) detected by the AC piconet load power is greater than the generated power within AC piconet AC power generating apparatus, and DC piconet direct current electrical generating power is greater than the DC piconet current load power, the energy management EMS power system based on the best path to the target function:

Figure CN103872701AD00093

计算出最佳功率路径。 Calculate the optimal power path.

[0036] 其中,fHaaift*)为双向DC/AC变换器正向转换效率函数,x.)为双向DC/AC变换器逆向转换效率函数,为双向AC/DC变换器正向转换效率函数,为AC/DC直流变换器逆向转换效率函数,为双向DC/DC变换器正向转换效率函数, [0036] wherein, fHaaift *) is a bidirectional DC / AC converter forward conversion efficiency function, x.) Is a bidirectional DC / AC converter inverse conversion efficiency function as a bidirectional AC / DC converter forward conversion efficiency function, as AC / DC conversion efficiency DC converter inverse function, bidirectional DC / DC converter forward conversion efficiency function,

(夏)为双向DC/DC变换器逆向转换效率函数,为双向AC/AC变换器正向转换效率函数,为双向AC/AC变换器逆向转换效率函数,为单向AC/AC变换器效率函数,”獅(、1)为单向DC/DC变换器效率函数。 (Summer) is a bidirectional DC / DC converter inverse conversion efficiency function as a bidirectional AC / AC converter efficiency function forward converter, inverse conversion efficiency function is a bidirectional AC / AC converter, one-way AC / AC converter efficiency function "lion (1) is a unidirectional DC / DC converter efficiency function.

[0037] 本实施例只是本发明的较优实施方式,未进行详细描述的部分均采用公知的成熟技术。 [0037] known in the art mature Jiaoyou embodiments are merely embodiments of the present invention, portions not described in detail are used. 需要说明的是,在不背离本发明精神及其实质的情况下,熟悉本领域的技术人员当可根据本发明作出各种相应的改变和变形,但这些改变和变形都应属于本发明所附的权利要求的保护范围。 It is noted that, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding modifications and variations according to the present invention, such changes and modifications of the present invention should belong to the appended the scope of the claims.

Claims (10)

  1. 1.一种储能型交直流混合微网,包括交流微网、直流微网和电池储能系统,其特征在于,还包括与交流微网、直流微网和电池储能系统连接的能量管理系统EMS,交流微网与直流微网通过一个或多个双向DC/AC变换器连接,交流微网与直流微网分别通过一个或多个双向AC/DC变换器与一个或多个双向DC/DC变换器与电池储能系统连接;所述能量管理系统EMS还与外部电网控制中心连接。 1. An energy storage type of AC and DC piconet, the piconet including AC, DC micro network and battery energy storage system, characterized by further comprising energy management piconet connected to an AC, DC micro-cell energy storage system and the network system EMS, the DC piconet exchange through one or more piconet bidirectional DC / AC inverter connected to the DC AC piconet piconet, respectively, via one or more bi-directional AC / DC converter with one or more bidirectional DC / DC converter connected to the battery energy storage system; the energy management system (EMS) is also connected to an external grid control center.
  2. 2.根据权利要求1所述的储能型交直流混合微网,其特征在于:所述交流微网包括交流母线,连接到交流母线用于与外部公共电网连接的一个或多个双向AC/AC变换器、用于与外部用电设备进行能量交换的一个或多个双向AC/DC变换器、用于连接其他交流发电系统的一个或多个AC/AC变换器。 According to claim AC and DC energy storage type of the piconet 1, wherein: said alternating current piconet including AC bus connected to the AC bus for one or more utility grid connected to an external bidirectional AC / one or more bi-directional AC / DC converter AC converter, for energy exchange with the external electrical device, for connecting the AC power generating system of another one or more AC / AC converter.
  3. 3.根据权利要求2所述的储能型交直流混合微网,其特征在于:所述直流微网包括直流母线,连接到直流母线用于连接其他直流发电系统的一个或多个DC/DC变换器、用于连接外部用电设备一个或多个双向DC/DC变换器及一个或多个DC/DC变换器。 Type accumulator according to claim piconet AC and DC of claim 2, wherein: the DC bus comprises a DC piconet connected to a DC bus connected to the other direct current power generation system or a plurality of DC / DC converter for connection to an external electrical device or a plurality of bi-directional DC / DC converter, and one or more DC / DC converter.
  4. 4.根据权利要求3所述的储能型交直流混合微网,其特征在于:能量管理系统EMS包括主控单元,与直流微网连接的直流微网监控单元、与交流微网连接的交流微网监控单元和与电池储能系统连接的电池管理单元;所述直流微网监控单元、交流微网监控单元及电池管理单元均与主控单元连接; 所述直流微网监控单元与交流微网监控单元通过通信总线分别与直流微网和交流微网的各个变换器连接; 所述交流微网监控单元与连接交流微网和直流微网的各个变换器连接; 所述电池管理单元通过一个或多个双向DC/DC变换器以及一个或多个的双向AC/DC变换器分别于与直流微网和交流微网连接。 The AC and DC energy storage type piconet according to claim 3, wherein: the energy management system (EMS) includes a main control unit AC, DC micro-network monitoring unit connected to a DC piconet, the piconet connection AC microgrid monitoring unit and the battery management unit connected to the battery energy storage system; piconet monitoring unit of the DC, AC and a battery monitoring unit piconet management unit are connected to the main control unit; said DC piconet exchange micro control unit and network monitoring unit are connected via a communication bus, respectively, and the respective inverter DC piconet exchange piconet; each of said AC inverter control unit and connected piconet AC and DC microgrid piconet; said battery management unit through a or a plurality of bidirectional DC / DC converter, and one or more of the bidirectional AC / DC converters are connected to the DC to AC piconet and the piconet.
  5. 5.一种储能型交`直流混合微网的控制方法,其特征在于,包括以下步骤: (1)能量管理系统EMS初始化; (2)能量管理系统EMS获取交流微网、直流微网发以及电池储能系统蓄电池储能系统的信息数据; (3)能量管理系统EMS实时获取外部公共电网的信息数据; (4)根据上述获取到的数据进行对交流微网、直流微网发以及电池储能系统进行调控。 A storage control method type AC-DC hybrid `piconet, characterized by comprising the steps of: (1) the energy management system (EMS) initialization; (2) the energy management system (EMS) obtaining AC piconet, the piconet hair DC and a battery energy storage system the information data of the battery energy storage system; (3) the energy management system (EMS) to obtain information in real-time data of the external utility grid; (4) according to the data acquired above piconet AC, DC micro cell and network development energy storage system regulation.
  6. 6.根据权利要求5所述的一种储能型交直流混合微网的控制方法,其特征在于,步骤(2)所述的信息数据包括: (I)交流微网、直流微网、电池储能系统以及外部公共电网的负荷状态; (II)交流微网、直流微网中发电系统的发电功率,电池储能系统当前剩余功率;步骤(3)所述的信息数据包括:外部公共电网负荷预测曲线,电动汽车充电预测曲线以及交直流微网中的发电系统发电功率预测曲线。 An energy storage type according to the control method of AC and DC microgrids claim, characterized in that the information data (2) comprises the step of: (I) AC piconet, the piconet current, battery the energy storage system and the load state of the external utility grid; (II) exchange piconet, the piconet power DC power generation system, the available power of the battery energy storage system; information data in step (3) comprises: an external utility grid load prediction curve, electric vehicle charging predicted power generation system and the power curve AC and DC prediction curve in the piconet.
  7. 7.根据权利要求6所述的一种储能型交直流混合微网的控制方法,其特征在于,所述获取交流微网、直流微网、电池储能系统以及外部公共电网负荷状态的方法为:通过与外部公共电网连接的双向AC/AC变换器的获取当前主节点功率的流动方向及大小; 通过连接交流微网和直流微网的各个双向AC/ DC变换器、连接外部用电设备的各个双向AC/DC变换器以及外部用电设备各个双向DC/DC变换器的数据,并根据交流微网从节点恒功率控制原则: 7. A method for the storage-type DC-6, hybrid control method according to claim piconet, wherein the piconet obtaining AC, DC microgrid, battery energy storage system and the external grid of the common load state is: AC converter obtain flow direction and magnitude of the current master node by a bidirectional AC power utility grid connected to the external /; connected through respective bidirectional AC AC and DC piconet piconet / DC converter, connected to an external electrical apparatus each dual AC data / respective bidirectional DC / DC converter to DC converter and an external electrical apparatus, and the control principle according to the constant power from the AC node piconet:
    Figure CN103872701AC00031
    与直流微网从节点恒功率控制原则: The DC microgrid node from constant power control principle:
    Figure CN103872701AC00032
    .算当如交流微网、直流微网和电池储能系统的能量流动方向及大小; 其中其中尽^为直流负载,为交流负载,为直流发电系统发出功率, 为交流发电系统发出功率,^«为电网提供功率,尽《为电池储存系统中存储的功率,^ET-h«为电动汽车电池系统所需功率。 . When the operator as the energy flow direction and magnitude of the AC piconet, and piconet DC battery energy storage system; wherein the DC load which do ^, an AC load, a DC power generation system issued, issued AC power generating system, ^ << provide power to the grid, the best "for the battery storage system to store power, ^ ET-h« power required for the electric vehicle battery systems.
  8. 8.根据权利要求7所述的一种储能型交直流混合微网的控制方法,其特征在于,所述步骤(4)的方法为:(41)能量管理系统EMS根据各个预测曲线,判断是否需要将富裕电能回馈外部公共电网; (42)能量管理系统EMS,根据负载大小通过效率最优算法获取最佳功率路径,并根据最佳功率路径调整的各个变换器的组合和负载分配组合。 8. An energy storage mode control method of claim 7 AC and DC microgrids claim, wherein said method step (4) as: (41) the energy management system (EMS) in accordance with the respective prediction curve determined need for external power back to a utility grid FE; (42) energy management system EMS, for the best path through the power optimization algorithm efficiency according to the load size, load distribution and composition are combined and adjusted according to the best path to each power converter.
  9. 9.根据权利要求8所述的一种储能型交直流混合微网的控制方法,其特征在于,步骤(41)判断是否需要将富裕电能回馈外部公共电网的方法为:根据各个预测数据计算未来单位时间内直流发电系统的功率能否满电池储能系统的储能要求,若满足则将发送相关指令到相关的双向AC/DC变换器将交流微网的多余电能回馈到外部公共网络;若未来单位时间内直流发电系统的功率不能满足电池储能系统的储能要求,且未来交直流微网内有较大的负载需求,将发送相关指令到相关的双向AC/DC变换器将交流微网多余电能储存在电池系统中。 A storage control method of claim 8 type AC and DC microgrids claim, characterized in that the method step (41) necessary to determine whether the FE external utility grid power back to: calculate data based on each prediction DC power within the next unit time whether the full-power generation system storage requirements for battery energy storage system, if the relevant instructions will be sent to meet the relevant bidirectional AC / DC converter converts excess power back to AC piconet external public network; If the next unit time of DC power generation system can not meet the requirements of the storage battery energy storage systems, and future needs of the large load DC piconet, to send the relevant instructions to the relevant bidirectional AC / DC converter AC piconet excess power stored in the battery system.
  10. 10.根据权利要求9所述的一种储能型交直流混合微网控制方法,其特征在于,所述步骤(42)还包括以下步骤: (42a)当能量管理系统EMS检测到直流微网负载功率大于直流微网内直流发电设备的发电功率时,能量管理系统EMS依据最佳功率路径目标函数: 10. An energy storage type of AC and DC piconet control method according to claim 9, wherein said step (42) further comprises the steps of: (42a) when the energy management system (EMS) detects DC piconet the load power is greater than the generated power current piconet DC power plant, the energy management system (EMS) according to the optimum path to the target power function:
    Figure CN103872701AC00033
    计算出合理的功率路径; (42b)当能量管理系统EMS检测到交流微网负载功率大于交流微网内交流发电设备的发电功率,且直流微网中直流发电功率小于直流微网中直流负载功率时,能量管理系统EMS依据最佳功率路径目标函数: Calculate a reasonable power path; (42b) when the energy management system (EMS) detected by the AC piconet load power is greater than the generated power within AC piconet AC power generating apparatus, and DC piconet direct current electrical generating power is less than the DC piconet current load power , the energy management system (EMS) based on the best path to power objective function:
    Figure CN103872701AC00034
    计算出合理的功率路径; (42c)当能量管理系统EMS检测到交流微网负载功率大于交流微网内交流发电设备的发电功率,且直流微网中直流发电功率大于直流微网中直流负载功率时,能量管理系统EMS依据最佳功率路径目标函数: Calculate a reasonable power path; (42c) when the energy management system (EMS) detected by the AC piconet load power is greater than the generated power within AC piconet AC power generating apparatus, and DC piconet direct current electrical generating power is greater than the DC piconet current load power , the energy management system (EMS) based on the best path to power objective function:
    Figure CN103872701AC00041
    计算出最佳功率路径; 其中,%Β«(ι)为双向DC/AC变换器正向转换效率函数,%μμ£ι)为双向DC/AC变换器逆向转换效率函数,》W6«D为双向AC/DC变换器正向转换效率函数,为AC/DC直流变换器逆向转换效率函数, 为双向DC/DC变换器正向转换效率函数, 为双向DC/DC变换器逆向转换效率函数,faupCx)为双向AC/AC变换器正向转换效率函数,为双向AC/AC变换器逆向转换效率函数,为单向AC/AC变换器效率函数,为单向DC/`DC变换器效率函数。 Calculate the optimal power path; wherein,% Β «(ι) is a bidirectional DC / AC converter efficiency function forward conversion,% μμ £ ι) is a bidirectional DC / AC converter inverse conversion efficiency function," W6 «D is bidirectional AC / DC converter efficiency function forward, reverse conversion efficiency function AC / DC-DC converter, a bidirectional DC / DC converter efficiency function forward converter, a bidirectional DC / DC converter inverse conversion efficiency function, faupCx ) is bi-directional AC / AC converter forward conversion efficiency function as a bidirectional AC / AC converter inverse conversion efficiency function as a one-way AC / AC converter efficiency function as a unidirectional DC / `DC converter efficiency function.
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CN104300589A (en) * 2014-10-30 2015-01-21 国家电网公司 Hierarchical control method for ad/dc microgrid with direct voltage recovery character
CN104485689A (en) * 2014-12-12 2015-04-01 合肥工业大学 Adaptive mode switching based droop control method
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CN104682375A (en) * 2015-03-24 2015-06-03 华为技术有限公司 Power supply equipment and power supply method for data center
CN105244909A (en) * 2015-10-14 2016-01-13 国网河南省电力公司电力科学研究院 Direct-current micro-grid system and grid-connection self-balancing control strategy
CN105305474B (en) * 2015-12-01 2018-07-31 河北凯翔电气科技股份有限公司 Rapid species grid load balancing regulation system and control method
CN105305474A (en) * 2015-12-01 2016-02-03 河北凯翔电气科技股份有限公司 Power network load rapid balance adjusting system and control method thereof
CN105449821A (en) * 2015-12-09 2016-03-30 国家电网公司 AC-DC hybrid microgrid system
CN105552940B (en) * 2015-12-22 2018-03-13 广东顺德中山大学卡内基梅隆大学国际联合研究院 Distributed globally optimal energy management system multiplier algorithm based on alternating direction
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CN105896619A (en) * 2016-05-03 2016-08-24 北京北变微电网技术有限公司 V2G AC/DC hybrid micro-grid control method
CN105914799A (en) * 2016-05-03 2016-08-31 北京北变微电网技术有限公司 V2G (Vehicle-to-grid) AC-DC mixed micro grid power supply system and structure
CN105914885A (en) * 2016-05-17 2016-08-31 中国铁塔股份有限公司重庆市分公司 Base station oil engine power generation monitoring and signal obtaining integrated terminal, and signal obtaining method
CN106505615A (en) * 2016-11-16 2017-03-15 常州天合光能有限公司 Independent microgrid-based electric vehicle charging station power supply station
CN106487086A (en) * 2016-11-25 2017-03-08 国网江苏省电力公司扬州供电公司 Direct-current microgrid coordination and control method including electric automobile charging and discharging management
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CN106788140B (en) * 2017-01-20 2018-08-28 合肥聚能新能源科技有限公司 Species Common DC bus PV modular storage system

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