期刊
IEEE TRANSACTIONS ON SMART GRID
卷 11, 期 5, 页码 4440-4453出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSG.2020.2979368
关键词
Topology; Network topology; Voltage measurement; Phasor measurement units; Estimation; Smart meters; Mathematical model; Topology identification; state estimation; distribution network; smart meter; data-driven
资金
- International (Regional) Joint Research Project of National Natural Science Foundation of China [71961137004]
- Tsinghua University Initiative Scientific Research Program [20193080026]
- Open Project of State Key Laboratory of Power Systems [SKLD17KM02]
- Technical Project of the State Grid: Research and Application of Internet-based Operation Platform for Ubiquitous Internet of Things in Electricity
The energy management system becomes increasingly indispensable with the extensive penetration of new players in the distribution networks, such as renewable energy, storage, and controllable load. Also, the operation optimization of the active distribution system requires information on operation state monitoring. Smart measuring equipment enables the topology identification and branch line parameters estimation from a data-driven perspective. Nevertheless, many current methods require the nodal voltage angles measured by phasor measurement units (PMUs), which might be unrealistic for conventional distribution networks. This paper proposes a numerical method to identify the topology and estimate line parameters without the information of voltage angles. We propose a two-step framework: the first step applies a data-driven regression method to provide a preliminary estimation on the topology and line parameter; the second step utilizes a joint data-and-model-driven method, i.e., a specialized Newton-Raphson iteration and power flow equations, to calculate the line parameter, recover voltage angle and further correct the topology. We test the method on IEEE 33 and 123-bus looped networks with load data from 1000 users in Ireland. The results demonstrate that the proposed method can provide an accurate estimation of the topology and line parameters based on limited samples of measurement without voltage angles.
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