scholarly journals Tie‐line planning for resilience enhancement in unbalanced distribution networks

2021 ◽  
Author(s):  
Babak Taheri ◽  
Amir Safdarian
Keyword(s):  
Distribution Networks ◽  
Line Planning ◽  
Tie Line

scholarly journals Study on Grid-Connected Strategy of Distribution Network with High Hydropower Penetration Rate in Isolated Operation

Processes ◽  
2019 ◽  
Vol 7 (6) ◽  
pp. 328 ◽  
Author(s):  
Zifan Zhang ◽  
Zhidong Wang ◽  
Zhifeng Chen ◽  
Gan Wang ◽  
Na Shen ◽  
...  
Keyword(s):  
Power Systems ◽  
Computer Aided Design ◽  
Distribution Network ◽  
Reducing Power ◽  
Distribution Networks ◽  
Open Loop ◽  
Frequency Characteristics ◽  
Utilization Efficiency ◽  
Small Hydropower ◽  
Tie Line

As the largest global renewable source, hydropower is a useful supplement to mountainous distribution networks with abundant water resources, and shoulders a large portion of the regulation duty in many power systems. In particular, in the form of decentralized energy sources located to their customers, small hydropower (SHP) improve grid stability by diversifying the electricity system and reducing power loss. The mountainous distribution networks supplied by small hydropower are closed-loop design but open-loop operation, which easily causes the tripping of tie line even further the off-grid operation of small hydropower system. Once the tie line trips, the current countermeasures—such as hydropower shutdown and load shedding—do not fully guarantee the reliability of power supply and the utilization efficiency of hydropower. This paper studies the amplitude-frequency characteristics of SHP off-grid, according to the typical integration of hydropower in South China, a SHP on-grid/off-grid model is established based on the Power Systems Computer Aided Design (PSCAD) platform. It is found that due to the inertia of SHP, the amplitude-frequency characteristics of SHP island system are relatively slow, and the process of non-synchronization with the main grid is gradually expanded. The characteristic of SHP has a certain degree of synchronization with the main grid in the initial island operates stage, which helps to find a novel grid connection method. This paper further proposes the strategy of using fast busbar automatic transfer switch (BATS), which quickly connect the trip-off SHP to the distribution network under the condition of permitting distributed energy grid-connected. The PSCAD simulation results show that proposed strategy has a limited impact on the power grid and prove the effectiveness of the method.

scholarly journals Multi-area environmentally constrained active–reactive optimal power flow: a short-term tie line planning study

2016 ◽  
Vol 10 (2) ◽  
pp. 299-309 ◽  
Author(s):  
Mahdi Pourakbari-Kasmaei ◽  
Marcos Julio Rider ◽  
Jose Roberto Sanches Mantovani
Keyword(s):  
Power Flow ◽  
Optimal Power Flow ◽  
Planning Study ◽  
Short Term ◽  
Line Planning ◽  
Optimal Power ◽  
Tie Line

Microgrids and Active Distribution Networks

2009 ◽  
Author(s):  
S. Chowdhury ◽  
S. P. Chowdhury ◽  
P. Crossley
Keyword(s):  
Distribution Networks ◽  
Active Distribution Networks
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