考虑直流固态断路器通态压降的低压直流配电网最优潮流

发布时间：2019-07-06 19:44

【摘要】：在直流固态断路器的实际应用中发现,其通态压降将对低压直流配电网的系统潮流产生不可忽略的影响。因此,文中对考虑直流固态断路器通态压降的低压直流配电网最优潮流(OPF)问题进行研究,建立了只包含连续变量的直流固态断路器稳态模型,从而可以方便地使用现有方法对该问题进行求解。通过RT-Lab仿真实验和对不同电压等级直流配电网的潮流分析可知,对于低压直流配电网而言,直流固态断路器的通态压降不可忽略,否则将导致较大的电压、功率计算误差,严重时将影响系统运行安全。此外,基于RT-Lab仿真平台,分别在考虑和不考虑断路器通态压降的情况下,对低压直流配电网OPF指令的控制效果给予验证。仿真结果表明,在低压直流配电网OPF中,考虑直流固态断路器的通态压降是必要的,并且所得到的指令可较为可靠地控制系统状态使其维持在可行域范围内。
文内图片：

图片说明：图１具有双向导通能力的直流固态断路器拓扑Ｆｉｇ．１ＴｏｐｏｌｏｇｙｏｆＤＣｓｏｌｉｄｓｔａｔｅｃｉｒｃｕｉｔｂｒｅａｋｅｒｗｉｔｈｂｉｄｉｒｅｃｔｉｏｎａｌｃｏｎｄｕｃｔｉｏｎｃａｐａｂｉｌｉｔｙ
[Abstract]:In the practical application of DC solid state circuit breaker, it is found that the on-state voltage drop will have an important influence on the power flow of low voltage DC distribution network. Therefore, the optimal power flow (OPF) problem of low voltage DC distribution network considering on-state voltage drop of DC solid state circuit breaker is studied in this paper, and the steady state model of DC solid state circuit breaker with only continuous variables is established, so that the problem can be solved conveniently by using the existing methods. Through RT-Lab simulation experiment and power flow analysis of DC distribution network with different voltage levels, it can be seen that the on-state voltage drop of DC solid-state circuit breaker can not be ignored for low-voltage DC distribution network, otherwise it will lead to large voltage and power calculation error, which will affect the operation safety of the system. In addition, based on RT-Lab simulation platform, the control effect of OPF instruction in low voltage DC distribution network is verified when the on-state voltage drop of circuit breaker is considered and not considered respectively. The simulation results show that it is necessary to consider the on-state voltage drop of DC solid-state circuit breaker in low voltage DC distribution network OPF, and the obtained instructions can reliably control the state of the system so that it can be maintained in the feasible domain.
【作者单位】：浙江大学电气工程学院;深圳供电局有限公司;
【基金】：国家高技术研究发展计划(863计划)资助项目(2013AA050104)~~
【分类号】：TM744

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