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Impacts of UPFC on line flows and transmission usage

机译：UPFC对线路流量和传输用法的影响

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In a competitive electricity market, installing the Unified Power Flow Controller (UPFC) can improve power transfer capability and help market participants keep their schedules very close to preferred ones and at the same time may retain the competitive behavior of participants. Putting the UPFC in service may assist system to operate within its physical limits and reduce total generation cost associated with out-of-merit order caused by constrained transmission. However, a competitive electricity market necessitates a reliable method to allocate congestion charges, transmission usage, and transmission pricing in an unbiased, open-accessed, basis. Therefore, it is usually necessary to trace contribution of each participant to line usage and congestion charges, and then to calculate charges based on these contributions. It has been a common practice to use distribution factors to calculate these contributions. Therefore, in this paper we present a mathematical approach to allocate the contributions of UPFCs to transmission system usage using a de-based load flow model of UPFC-inserted transmission lines, based on a previously derived dc-based injection model of UPEC-embedded lines by this author. The present paper derives relationships to model impact of UPFC on line flows and transmission usage where we present modified admittances and distribution factors that model impact of utilizing UPFC on line flows and system usage. The relationships derived show how bus voltage angles are attributed to each of changes in generation, injections of UPFC, and changes in admittance matrix caused by inserting UPFC in transmission lines. The relationships derived can be adopted for the purpose of allocating usage and payments to users of transmission network and owners of control devices used in the network. The relationships derived are applied to test systems, where the results illustrate how transmission usage is affected when UPFC is utilized.
机译：在一个有竞争力的电力市场中，安装统一的电力流量控制器（UPFC）可以提高电力传输能力，帮助市场参与者保持他们的时间表非常接近首选，同时可以保留参与者的竞争行为。将UPFC置于服务中可能有助于系统在其物理限制内运行，并降低由受约束传输引起的廉价顺序相关的总成成本。然而，竞争力的电力市场需要一种可靠的方法来分配拥堵费用，传输使用和传输定价，以无偏见，开放式访问。因此，通常需要追踪每个参与者对线使用和拥塞费用的贡献，然后根据这些贡献计算费用。使用分配因素来计算这些贡献是一项常见的做法。因此，在本文中，我们介绍了一种数学方法，基于UPEC嵌入线的先前导出的直流注射模型，使用基于VEFC插入传输线的基于DC的负载流模型来分配UPFC对传输系统使用的贡献。由这个作者。本文源于富裕在线流量和传输使用的模型影响的关系，在那里我们提出了模型影响的改进的入院和分配因素，这些因素利用UPFC在线流量和系统使用情况。衍生的关系显示总线电压角度归因于由EPFC的生成，注射喷射的每个变化以及通过在传输线中插入UPFC引起的进入矩阵的变化。可以采用导出的关系用于分配使用和付款给网络传输网络和网络中使用的控制设备的所有者的用户。导出的关系被应用于测试系统，其中结果示出了在使用UPFC时如何影响传输使用。

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