Backup Protection for Tie Lines in a Double-Petal-mode Distribution Network

2021 ◽  
Author(s):  
Jingkai Kong ◽  
Yuejia Li ◽  
Wujiapin Yao ◽  
Yi Zhao ◽  
Jiaxing Zhou ◽  
...  
Keyword(s):  
Distribution Network ◽  
Backup Protection ◽  
Tie Lines

scholarly journals Coordinated Dispatch of Multi-Energy Microgrids and Distribution Network with a Flexible Structure

2019 ◽  
Vol 9 (24) ◽  
pp. 5553
Author(s):  
Sijie Chen ◽  
Yongbiao Yang ◽  
Qingshan Xu ◽  
Jun Zhao
Keyword(s):  
Distribution Network ◽  
Optimal Strategies ◽  
Optimal Operation ◽  
Mixed Integer ◽  
Power Sources ◽  
Optimal Dispatch ◽  
Energy Devices ◽  
Renewable Power ◽  
Tie Lines ◽  
Combined Cooling

With the increasing scale of multi-energy microgrids (MGs) and complicated operation modes, the coordinated operation of microgrids and the distribution network (DN) has posed great challenges. In this paper, a bi-level optimal coordinated dispatch framework of the DN and multi-energy MGs based on CCHP (combined cooling, heating, and power) is proposed. The first level studies the optimal operation of the DN with power interaction on tie lines between MGs considering the coupling relationship and constraints of the equipment and network. The network reconfiguration with limited control actions is considered to increase the flexibility of the topology and further improve the working state. For the second level, MGs receive orders from the DN and determine the optimal strategies of multi-energy devices to achieve optimized operation under the condition of satisfying the different types of load and requirement for the DN. To solve the optimal dispatch problem of both the DN and the multi-energy MGs considering the DN reconfiguration, a method combining particle swarm optimization algorithm (PSO) with mixed-integer linear programming (MILP) is proposed. Cases studied in an IEEE33-node DN with renewable power sources and grid-connected MGs validate that the proposed method is very effective in reducing the power loss and voltage offset of the DN while ensuring the benefits of the MGs.

scholarly journals A Novel Multi-Area Distribution State Estimation Approach for Active Networks

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1772
Author(s):  
Mohammad Gholami ◽  
Ali Abbaspour Tehrani-Fard ◽  
Matti Lehtonen ◽  
Moein Moeini-Aghtaie ◽  
Mahmud Fotuhi-Firuzabad
Keyword(s):  
State Estimation ◽  
Large Scale ◽  
Distribution Network ◽  
Distribution Networks ◽  
Operating Conditions ◽  
Active Networks ◽  
Local State ◽  
Tie Lines ◽  
Distribution State ◽  
State Estimations

This paper presents a hierarchically distributed algorithm for the execution of distribution state estimation function in active networks equipped with some phasor measurement units. The proposed algorithm employs voltage-based state estimation in rectangular form and is well-designed for large-scale active distribution networks. For this purpose, as the first step, the distribution network is supposed to be divided into some overlapped zones and local state estimations are executed in parallel for extracting operating states of these zones. Then, using coordinators in the feeders and the substation, the estimated local voltage profiles of all zones are coordinated with the local state estimation results of their neighboring zones. In this regard, each coordinator runs a state estimation process for the border buses (overlapped buses and buses with tie-lines) of its zones and based on the results for voltage phasor of border buses, the local voltage profiles in non-border buses of its zones are modified. The performance of the proposed algorithm is tested with an active distribution network, considering different combinations of operating conditions, network topologies, network decompositions, and measurement scenarios, and the results are presented and discussed.

Determination Method for Optimal Installation of Active Filters in Distribution Network with Distributed Generation

2009 ◽  
Vol 129 (6) ◽  
pp. 733-744 ◽  
Author(s):  
Shoji Kawasaki ◽  
Yasuhiro Hayashi ◽  
Junya Matsuki ◽  
Hirotaka Kikuya ◽  
Masahide Hojo
Keyword(s):  
Distributed Generation ◽  
Distribution Network ◽  
Active Filters ◽  
Determination Method

Online Reconfiguration of Distribution Network System based on Load Information from Sensors Embedded in Sectionalizing Switches

2012 ◽  
Vol 132 (10) ◽  
pp. 853-861 ◽  
Author(s):  
Takuya Ishitani ◽  
Ryoichi Hara ◽  
Hiroyuki Kita ◽  
Eiji Kogure ◽  
Yuki Mitsukuri ◽  
...  
Keyword(s):  
Distribution Network ◽  
Network System

Development of Discrete CoFFWA for Distribution Network Reconfigurations

2018 ◽  
Vol 138 (6) ◽  
pp. 494-500
Author(s):  
Hiromitsu Ikegami ◽  
Hiroyuki Mori
Keyword(s):  
Distribution Network
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