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应用于能源局域网的固态变压器运行研究

应用于能源局域网的固态变压器运行研究

Research on Operation of Solid State Transformer in Energy Local Network

Research on Operation of Solid State Transformer in Energy Local Network

doi:
10.3969/j.issn.1007-290X.2018.002.004
摘要:
针对传统微电网中各分布式电源利用各自的并网变换器接入配电网而引起的系统结构复杂、控制管理困难、不利于协调优化、难以实现即插即用等问题,提出一种各分布式电源、储能设备和负载通过固态变压器提供的交直流接口接入系统的能源局域网架构,并利用所设计的固态变压器及分布式电源、储能的控制策略对该能源局域网的协调运行进行研究,以实现维持母线电压恒定和确保重要负载正常供电的目的;同时考虑并网和孤岛2种运行方式,设计4种工作模式,对各种运行工况和暂态过程下的能源局域网运行情况进行 MATLAB/Simulink仿真.仿真结果表明所提控制策略能够减小高渗透率的可再生能源输出功率波动和负荷变化引起的电压波动,稳定母线电压,验证了所提控制策略的可行性和有效性.
Abstract:
In allusion to problems such as complicated system structures,difficult control and management,being unfavor-able to coordinated optimization,difficulty in plug and play due to distributed generations (DGs)in traditional micro-grid u-sing respective grid-connected converters to access to the power distribution networks,this paper proposes a kind of energy local network framework for DGs,energy storage devices and loads accessing to the system via AC/DC interface provided by the solid state transformer (SST).It uses the designed SST and control strategies of DGs and energy storage to study coordi-nated operation of the energy local network so as to keep the bus voltage constant and ensure normal power supply of impor-tant loads. Meanwhile,it considers two operation modes including grid-connection and island and designs four working modes to make simulation on operation of the energy local network under different operational conditions and transient process based on MATLAB/Simulink.Simulation results indicate the proposed control strategy can reduce fluctuation of out-put power of high permeability renewable energy and voltage fluctuation caused by load variation and stabilize bus voltage, which verifies feasibility and effectiveness of the strategy.
作者 朱光磊 [1] 樊利民 [1] 刘红业 [2]
Author: ZHU Guanglei[1] FAN Limin[1] LIU Hongye[2]
作者单位
  1. 华南理工大学 电力学院,广东 广州,510641
  2. 上海电力学院 电气学院,上海,200090
期 刊: 广东电力 ISTIC EI SCI PKU CSSCI
Journal: Guangdong Electric Power
年,卷(期) 2018, 31(2)
分类号 TM41
关键词: 能源互联网 知识脉络 能源局域网 知识脉络 固态变压器 知识脉络 并离网 知识脉络 协调运行 知识脉络
Keywords: energy internet energy local network solid state transformer grid-connected and off-grid coordinated opera-tion
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