scholarly journals A New Reactive-Power Sharing Scheme for Two Inverter-Based Distributed Generations with Unequal Line Impedances in Islanded Microgrids

Energies ◽  
2017 ◽  
Vol 10 (11) ◽  
pp. 1800 ◽  
Author(s):  
Jae-Hyuk Kim ◽  
Yoon-Seok Lee ◽  
Hyun-Jun Kim ◽  
Byung-Moon Han
Keyword(s):  
Reactive Power ◽  
Power Sharing ◽  
Distributed Generations ◽  
Sharing Scheme

scholarly journals Distributed Generation Control Using Modified PLL Based on Proportional-Resonant Controller

2020 ◽  
Vol 10 (24) ◽  
pp. 8891
Author(s):  
Ahmad Zare ◽  
Mazda Moattari ◽  
Rui Melicio
Keyword(s):  
Reactive Power ◽  
Frequency Measurement ◽  
Network Control ◽  
Power Sharing ◽  
Distributed Generations ◽  
Control Approach ◽  
Output Terminal ◽  
Allowable Range ◽  
Terminal Voltage ◽  
Electrical Demand

Due to the increasing necessity for electrical demand, the microgrids (MGs) based on distributed generations (DGs) within power electronic interfaces are being extended to improve the traditional network control. One of the common ways to achieve power sharing among the resources on an islanding MG is to use the droop control approach, performing based on proportional-integrator (PI) controllers. However, due to the effect of feeder impedance, obtaining the reactive power sharing using this method is not accurate and leads to overload in some DGs, resulting in the output terminal voltage of each DG going outside of the allowable range. The second problem arises when the frequency measurement is not performed precisely, leading to inaccurate active power sharing, which can be solved by using an improved phase locked loop (PLL). Therefore, the purpose of this paper is to propose an applicable and simple approach based on the use of conventional droop characteristics and a proportional-resonant (PR) controller in a DG control system. Due to the load changes in the microgrid and other contingencies, the proposed PLL-based controller is able to represent supreme performance with low error in several case studies.

A Novel Power Sharing Scheme of Controlling Parallel-Operated Inverters in Islanded Microgrids

2021 ◽  
pp. 1-1
Author(s):  
Wenyuan Cao ◽  
Minxiao Han ◽  
Xiahui Zhang ◽  
Wenqiang Xie ◽  
Gibran Agundis-Tinajero ◽  
...  
Keyword(s):  
Power Sharing ◽  
Sharing Scheme
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