scholarly journals Coordinated Control Method of Voltage and Reactive Power for Active Distribution Networks Based on Soft Open Point

2017 ◽  
Vol 8 (4) ◽  
pp. 1430-1442 ◽  
Author(s):  
Peng Li ◽  
Haoran Ji ◽  
Chengshan Wang ◽  
Jinli Zhao ◽  
Guanyu Song ◽  
...  
Keyword(s):  
Reactive Power ◽  
Control Method ◽  
Coordinated Control ◽  
Distribution Networks ◽  
Active Distribution Networks ◽  
Open Point

scholarly journals Decentralized Voltage Control Strategy of Soft Open Points in Active Distribution Networks Based on Sensitivity Analysis

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 295 ◽  
Author(s):  
Jinli Zhao ◽  
Mingkun Yao ◽  
Hao Yu ◽  
Guanyu Song ◽  
Haoran Ji ◽  
...  
Keyword(s):  
Large Scale ◽  
Control Method ◽  
Voltage Control ◽  
Distribution Networks ◽  
Power Electronic ◽  
Voltage Control Strategy ◽  
Distributed Generators ◽  
Alternating Direction ◽  
Active Distribution Networks ◽  
Open Point

With the increasing penetration of distributed generators, various operational problems, especially severe voltage violation, threaten the secure operation of active distribution networks. To effectively cope with the voltage fluctuations, novel controllable power electronic equipment represented by soft open points has been used in active distribution networks. Meanwhile, the communication has dramatically increased due to the rise of the variety and number of devices within the network. This paper proposes a decentralized voltage control method of soft open points based on voltage-to-power sensitivity. The method reduces the burden of communication, storage, and calculation effectively in a decentralized manner and fulfills the rapid requirements of large-scale active distribution networks. First, the network is divided into several sub-areas; each is under the control of one soft open point at most. The initial strategies of soft open points are adjusted by local voltage-to-power sensitivity and the voltage information within the sub-areas. If some nodal voltages still exceed the expected range after the sub-area autonomy, the operation strategies of soft open points are further improved by inter-area coordination with the alternating direction method of multipliers algorithm. The effectiveness of the proposed decentralized control method is verified on the IEEE 33-node system.

scholarly journals Coordinated control of active distribution networks to help a transmission system in emergency situation

2018 ◽  
Vol 9 (3) ◽  
pp. 831-851 ◽  
Author(s):  
J. Morin ◽  
F. Colas ◽  
J. Y. Dieulot ◽  
S. Grenard ◽  
X. Guillaud
Keyword(s):  
Emergency Situation ◽  
Coordinated Control ◽  
Distribution Networks ◽  
Transmission System ◽  
Active Distribution Networks

scholarly journals Experimental Assessment of a Centralised Controller for High-RES Active Distribution Networks

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3364 ◽  
Author(s):  
Francisco García-López ◽  
Manuel Barragán-Villarejo ◽  
Alejandro Marano-Marcolini ◽  
José Maza-Ortega ◽  
José Martínez-Ramos
Keyword(s):  
Renewable Energy ◽  
Distribution System ◽  
Reactive Power ◽  
Renewable Energy Sources ◽  
Distribution Networks ◽  
Energy Sources ◽  
Renewable Energy Resources ◽  
Real Time Control ◽  
Control Actions ◽  
Active Distribution Networks

This paper assesses the behaviour of active distribution networks with high penetration of renewable energy sources when the control is performed in a centralised manner. The control assets are the on-load tap changers of transformers at the primary substation, the reactive power injections of the renewable energy sources, and the active and reactive power exchanged between adjacent feeders when they are interconnected through a DC link. A scaled-down distribution network is used as the testbed to emulate the behaviour of an active distribution system with massive penetration of renewable energy resources. The laboratory testbed involves hardware devices, real-time control, and communication infrastructure. Several key performance indices are adopted to assess the effects of the different control actions on the system’s operation. The experimental results demonstrate that the combination of control actions enables the optimal integration of a massive penetration of renewable energy.

scholarly journals An Online Coordinated Charging/Discharging Strategy of Plug-in Electric Vehicles in Unbalanced Active Distribution Networks with Ancillary Reactive Service in the Energy Market

Energies ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1350 ◽  
Author(s):  
Nasim Jabalameli ◽  
Xianging Su ◽  
Sara Deilami
Keyword(s):  
Electric Vehicles ◽  
Reactive Power ◽  
Distribution Networks ◽  
Energy Market ◽  
Voltage Unbalance ◽  
Voltage Drops ◽  
Node Voltage ◽  
Coordinated Charging ◽  
Western Australian ◽  
Active Distribution Networks

The global acceptance and off-grid charging of plug-in electric vehicles (PEVs) are expected to grow tremendously in the next few years. Uncoordinated PEV charging can cause serious grid issues such as overloading of transformers and unacceptable voltage drops. Single-phase residential charging can also initiate or contribute to voltage unbalance conditions in the distribution networks. A potential solution and key challenge for PEV integration is shifting of the charging activities to off-peak periods. This paper proposes a new PEV coordination approach based on genetic algorithm (GA) optimization to perform online centralized charging and discharging considering transformer loading and node voltage magnitude and unbalance profiles. It allows PEV as source of active and reactive power to participate in energy market based on different prices during a day, without any degradation. Finally, the impacts of uncoordinated and the proposed GA coordinated PEV charging/discharging strategy are simulated for a real unbalanced Western Australian distribution network in the Perth solar city over 24 h.

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