基于直流电气弹簧的直流配电网电压波动抑制
发布时间：2018-11-16 07:38
【摘要】：直流配电网直接面向直流供用电设备,便于实现可再生能源的并网集成和直流负荷的高效用电,具有重要的应用前景。在直流配电网中,为了平抑由可再生能源引起的节点电压波动,该文提出直流电气弹簧的概念。利用电力电子变换器调节直流配电网中的可控负荷,使其跟随可再生能源出力的波动性和不确定性,实现对波动功率的就地平衡,避免间歇性潮流在配电线路上的传输,从而有效抑制直流配电网的电压波动。针对一个典型的直流配电网,在建立物理模型和电路模型的基础上,利用数学模型分析了电压波动问题的成因及其影响因素;然后提出了直流电气弹簧的数学模型、参数设计、控制策略和有效边界条件,对直流配电网的电压波动进行平抑;最后,利用PSCAD/EMTDC进行仿真,验证了所提控制方法的正确性和有效性。
[Abstract]:DC distribution network is directly oriented to DC power supply equipment, which is convenient to realize the grid integration of renewable energy and the efficient use of DC load, so it has an important application prospect. In order to reduce the voltage fluctuation caused by renewable energy in DC distribution network, the concept of direct current gas spring is proposed in this paper. The power electronic converter is used to adjust the controllable load in the DC distribution network, which follows the fluctuation and uncertainty of the renewable energy output, realizes the local balance of the fluctuating power, and avoids the intermittent power flow transmission on the distribution line. Thus the voltage fluctuation of DC distribution network is effectively restrained. For a typical DC distribution network, on the basis of establishing physical model and circuit model, the causes of voltage fluctuation and its influencing factors are analyzed by mathematical model. Then, the mathematical model, parameter design, control strategy and effective boundary conditions of DC gas spring are put forward to stabilize the voltage fluctuation of DC distribution network. Finally, PSCAD/EMTDC simulation is used to verify the correctness and effectiveness of the proposed control method.
【作者单位】： 输配电装备及系统安全与新技术国家重点实验室(重庆大学);国网江苏省电力公司经济技术研究院;中国电力科学研究院;
【基金】：国家重点基础研究发展计划(973项目)(2012CB215200) 中央高校基本科研业务费专项基金(106112015CDJXY150005,CDJZR12150074)资助项目
【分类号】：TM721.1
本文编号：2334883
[Abstract]:DC distribution network is directly oriented to DC power supply equipment, which is convenient to realize the grid integration of renewable energy and the efficient use of DC load, so it has an important application prospect. In order to reduce the voltage fluctuation caused by renewable energy in DC distribution network, the concept of direct current gas spring is proposed in this paper. The power electronic converter is used to adjust the controllable load in the DC distribution network, which follows the fluctuation and uncertainty of the renewable energy output, realizes the local balance of the fluctuating power, and avoids the intermittent power flow transmission on the distribution line. Thus the voltage fluctuation of DC distribution network is effectively restrained. For a typical DC distribution network, on the basis of establishing physical model and circuit model, the causes of voltage fluctuation and its influencing factors are analyzed by mathematical model. Then, the mathematical model, parameter design, control strategy and effective boundary conditions of DC gas spring are put forward to stabilize the voltage fluctuation of DC distribution network. Finally, PSCAD/EMTDC simulation is used to verify the correctness and effectiveness of the proposed control method.
【作者单位】： 输配电装备及系统安全与新技术国家重点实验室(重庆大学);国网江苏省电力公司经济技术研究院;中国电力科学研究院;
【基金】：国家重点基础研究发展计划(973项目)(2012CB215200) 中央高校基本科研业务费专项基金(106112015CDJXY150005,CDJZR12150074)资助项目
【分类号】：TM721.1
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