Routing strategy for DC power grid with electric power routers,International Transactions on Electrical Energy Systems

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Routing strategy for DC power grid with electric power routers
International Transactions on Electrical Energy Systems ( IF 1.9 ) Pub Date : 2020-10-21 , DOI: 10.1002/2050-7038.12677
Sha Sha ₁ , Jinghong Zheng ₁ , Zhengming Zhao ₁

Affiliation

The power grid constructed with electric power router (EPR) will have the ability of flexibly controlling the voltage and power flow on each line of the grid, which will be helpful to maximize the integration of the renewable distributed generation to the grid. Most of the current methods for transmitting energy depend on storage unit or large scale calculation, which are relatively difficult. To avoid these disadvantages, this paper proposed a two‐step routing strategy based on the improved shortest path method for DC power grid with EPRs. The improved shortest path method combines Shortest Path Faster Algorithm (SPFA) with depth first search (DFS) algorithm, which could handle the negative weights and the negative cycle issue in the graph of the power flow paths. The increase of the transmission line power loss and the EPR's power loss are taken as the weight for the path search method to evaluate the cost of the path. Applying the proposed method to each power demand and supply finally helps to obtain the current distribution of the whole grid. By analysis of typical scenarios, compared with the power flow distribution of traditional DC power grid, the one produced by the proposed strategy could improve the power transmission capability as well as reduce the maximum voltage drop in the network. Besides, this strategy introduces less power loss, than many other ways do, in power routing. The effectiveness of the rioting strategy is related to the configuration of the network.

中文翻译：

具有电力路由器的直流电网的路由策略

用电力路由器（EPR）建造的电网将具有灵活控制电网每条线路上的电压和潮流的能力，这将有助于最大程度地提高可再生分布式发电与电网的集成度。当前的大多数能量传输方法取决于存储单元或大规模计算，这相对困难。为避免这些缺点，本文提出了一种基于改进的最短路径方法的带EPR的直流电网两步路由策略。改进的最短路径方法将最短路径快速算法（SPFA）与深度优先搜索（DFS）算法结合在一起，可以处理潮流路径图中的负权重和负周期问题。传输线功率损耗和EPR'的增加将功率损耗作为路径搜索方法的权重，以评估路径成本。将所提出的方法应用于每个电力需求和供应，最终有助于获得整个电网的电流分布。通过对典型场景的分析，与传统直流电网的潮流分配相比，该策略产生的潮流可以提高输电能力，并降低网络中的最大压降。此外，与许多其他方法相比，此策略在电源布线中引入的功耗更低。防暴策略的有效性与网络的配置有关。将所提出的方法应用于每个电力需求和供应，最终有助于获得整个电网的电流分布。通过对典型场景的分析，与传统直流电网的潮流分配相比，该策略产生的潮流可以提高输电能力，并降低网络中的最大压降。此外，与许多其他方法相比，此策略在电源布线中引入的功耗更低。防暴策略的有效性与网络的配置有关。将所提出的方法应用于每个电力需求和供应，最终有助于获得整个电网的电流分布。通过对典型场景的分析，与传统直流电网的潮流分配相比，该策略产生的潮流可以提高输电能力，并降低网络中的最大压降。此外，与许多其他方法相比，此策略在电源布线中引入的功耗更低。防暴策略的有效性与网络的配置有关。与许多其他方法相比，此策略在功率路由中引入的功率损耗更少。防暴策略的有效性与网络的配置有关。与许多其他方法相比，此策略在功率路由中引入的功率损耗更少。防暴策略的有效性与网络的配置有关。

更新日期：2020-10-21

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