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能源互联网框架下多端口能量路由器的多工况协调控制
作者:
作者单位:

1.东南大学电气工程学院,江苏省 南京市 210096;2.国网合肥供电公司,安徽省 合肥市 230000

作者简介:

孙利(1995—),男,硕士研究生,主要研究方向:微电网运行与控制。E-mail:1121452757@qq.com
陈武(1981—),男,通信作者,博士,教授,博士生导师,主要研究方向:功率电子变换技术与新能源发电技术。E-mail:chenwu@seu.edu.cn
蒋晓剑(1993—),男,硕士,主要研究方向:输入串联输出并联(ISOP)系统的拓扑与控制策略设计。E-mail:531339007@qq.com

通讯作者:

基金项目:

国家重点研发计划资助项目(2018YFB0904100);国家电网公司科技项目(SGHB0000KXJS1800685)。


Coordinated Control of Multiple Operation Conditions for Multi-port Energy Router in Energy Internet Framework
Author:
Affiliation:

1.School of Electrical Engineering, Southeast University, Nanjing 210096, China;2.State Grid Hefei Power Supply Company, Hefei 230000, China

Fund Project:

This work is supported by National Key R&D Program of China (No. 2018YFB0904100) and State Grid Corporation of China (No. SGHB0000KXJS1800685).

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    摘要:

    多端口能量路由器是整合光伏、储能以及电动汽车充电桩的有效拓扑结构。在不同端口进行能量路由时,涉及多工况运行,无缝工况切换是一大难点。在能源互联网框架下,采用分层控制,使得能量路由器在电网调度、并离网、电动汽车接入切除等工况下都能够协调运行,从而实现工况的无缝切换。微网控制层采用集中式控制,维持各工况下系统整体能量平衡,既能与上层调度层交互,响应调度;也能与下层本地控制层通信,即采样各端口的状态信息,计算储能、充电桩的充放电电流给定值。本地控制层中光伏、电压源型变换器端口采用分布式控制,降低通信带宽;储能、充电桩端口采用所提的基于电流跟踪的新型下垂控制方法,精准传输所需功率,并控制直流母线电压稳定。最后,通过MATLAB仿真验证了所提统一协调控制策略的有效性。

    Abstract:

    Multi-port energy router is an effective topology structure of integrating photovoltaic, energy storage and charging pile of electric vehicle. When energy routing is performed at different ports, the energy router involves multiple operation modes. Therefore, seamless mode transition is a major difficulty. In the Energy Internet framework, hierarchical control of multi-port energy router enables coordinated operation to achieve seamless mode transition in power grid dispatching, grid-connected/off-grid conditions or in the condition that electric vehicle is integrated or cut off. The control layer of micro-network adopts centralized control to maintain the overall energy balance of the system with various operation modes, which interacts with the upper-level scheduling layer to respond to scheduling, communicates with the lower-level local control layer by sampling the state information of each port, and calculates the references current of energy storage and the charging pile. In the local control layer, ports of photovoltaic and voltage source converter adopt distributed control to reduce the communication bandwidth. Ports of energy storage and the charging pile adopt the proposed new droop control strategy based on current tracking to accurately transmit the required power and control the voltage stability of DC bus. Finally, the effectiveness of the proposed unified coordinated control strategy is verified by MATLAB simulation.

    表 1 Table 1
    图1 四端口能量路由器拓扑结构Fig.1 Topology structure of four-port energy router
    图2 分层控制框架Fig.2 Framework of hierarchical control
    图3 基本工作模式切换Fig.3 Flow chart of transition of basic operation modes
    图4 储能变换器控制策略Fig.4 Control strategy of energy storage converter
    图5 并网运行模式下典型工况切换仿真波形Fig.5 Simulation waveforms of typical operation mode transistion in grid-connected mode
    图1 四端口能量路由器拓扑结构Fig.1 Topology structure of four-port energy router
    图2 分层控制框架Fig.2 Framework of hierarchical control
    图3 基本工作模式切换Fig.3 Flow chart of transition of basic operation modes
    图4 储能变换器控制策略Fig.4 Control strategy of energy storage converter
    图5 并网运行模式下典型工况切换仿真波形Fig.5 Simulation waveforms of typical operation mode transistion in grid-connected mode
    图 并网运行模式下具体工况切换Fig. The transition of specific operating modes in the grid-connected mode
    图 电网调度馈电模式下具体工况切换Fig. The transition of specific operating modes in the grid dispatching feed mode
    图 电网调度吸收电能模式下具体工况切换Fig. The transition of specific operating modes in the grid dispatching absorption energy mode
    图 离网运行模式下具体工况切换Fig. The transition of specific operating modes in the off grid mode
    图 保护电池模式下的具体工况Fig. The specific operating modes in the battery-protecting mode
    图 系统停机模式Fig. System shutdown mode
    图 下垂控制二次电压补偿Fig. Droop control secondary voltage compensation
    图 电动汽车充电桩控制策略Fig. Electric vehicle charging pile control strategy
    图 统一协调控制策略Fig. Unified coordinated control strategy
    表 2 Table 2
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引用本文

孙利,陈武,蒋晓剑,等.能源互联网框架下多端口能量路由器的多工况协调控制[J].电力系统自动化,2020,44(3):32-39. DOI:10.7500/AEPS20190404005.
SUN Li,CHEN Wu,JIANG Xiaojian,et al.Coordinated Control of Multiple Operation Conditions for Multi-port Energy Router in Energy Internet Framework[J].Automation of Electric Power Systems,2020,44(3):32-39. DOI:10.7500/AEPS20190404005.

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  • 收稿日期:2019-04-04
  • 最后修改日期:2019-06-27
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  • 在线发布日期: 2020-02-14
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