scholarly journals New Power Sharing Control for Inverter-Dominated Microgrid Based on Impedance Match Concept

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Herong Gu ◽  
Deyu Wang ◽  
Hong Shen ◽  
Wei Zhao ◽  
Xiaoqiang Guo
Keyword(s):  
Power Flow ◽  
Reactive Power ◽  
Design Guidelines ◽  
Power Sharing ◽  
Impedance Match ◽  
Droop Control ◽  
Power Flow Control ◽  
Control Schemes ◽  
Virtual Impedance ◽  
Control Coefficients

Power flow control is one of the most important issues for operating the inverter-dominated autonomous microgrid. A technical challenge is how to achieve the accurate active/reactive power sharing of inverters.P-FandQ-Vdroop control schemes have been widely used for power sharing in the past decades. But they suffer from the poor power sharing in the presence of unequal line impedance. In order to solve the problem, a comprehensive analysis of the power droop control is presented, and a new droop control based on the impedance match concept is proposed in this paper. In addition, the design guidelines of control coefficients and virtual impedance are provided. Finally, the performance evaluation is carried out, and the evaluation results verify the effectiveness of the proposed method.

scholarly journals Robust Parallel Operated Inverters in Microgrid with SRF(Synchronous Reference Frame) – PLL(Phase Locked Loop) and SRF - Virtual Impedance Compensation Loop for Proportional Load Sharing

2019 ◽  
Vol 9 (2) ◽  
pp. 5619-5625
Keyword(s):  
Power Flow ◽  
Control Method ◽  
Phase Locked Loop ◽  
Design Guidelines ◽  
Droop Control ◽  
Power Flow Control ◽  
Synchronous Reference Frame ◽  
Different Types ◽  
Islanded Mode ◽  
Virtual Impedance

Power flow control is most important in inverter interfaced Microgrids with highly penetrated DERs in islanded mode for their functionality to feed the connected loads. The different types of interfacing inverters connected to DERs, have been discussed for their principle of operation. The conventional inverters with droop control method of, P-f, Q-v alone failed to control with unequal line impedances. New inverters with SRFvirtual impedance compensation and SRF-phase locked loop along with droop characterstics have been implemented for defined functionalities in this paper. The design guidelines have been provided and the results are evaluated in Matlab/ Simulink platform to prove the effectiveness of the methodology.

Differentiation Coherence Algorithm for Steady Power Flow Control

2015 ◽  
Vol 9 (1) ◽  
pp. 107-116 ◽  
Author(s):  
Yang Liu-Lin ◽  
Hang Nai-Shan
Keyword(s):  
Flow Control ◽  
Extreme Point ◽  
Power Flow ◽  
Reactive Power ◽  
Small Deviation ◽  
Function Optimization ◽  
Flow Mode ◽  
Power Flow Control ◽  
Active And Reactive Power ◽  
Variable Inequality

This paper researched steady power flow control with variable inequality constraints. Since the inverse function of power flow equation is hard to obtain, differentiation coherence algorithm was proposed for variable inequality which is tightly constrained. By this method, tightly constrained variable inequality for variables adjustment relationships was analyzed. The variable constrained sensitivity which reflects variable coherence was obtained to archive accurate extreme equation for function optimization. The hybrid power flow mode of node power with branch power was structured. It also structured the minimum variable model correction equation with convergence and robot being same as conventional power flow. In fundamental analysis, the effect of extreme point was verified by small deviation from constrained extreme equation, and the constrained sensitivity was made for active and reactive power. It pointed out possible deviation by using simplified non-constrained sensitivity to deal with the optimization problem of active and reactive power. The control solutions for power flow for optimal control have been discussed as well. The examples of power flow control and voltage management have shown that the algorithm is simple and concentrated and shows the effect of differential coherence method for extreme point analysis.

scholarly journals An Improved Droop Control Strategy for Reactive Power Sharing in Islanded Microgrid

2015 ◽  
Vol 30 (6) ◽  
pp. 3133-3141 ◽  
Author(s):  
Hua Han ◽  
Yao Liu ◽  
Yao Sun ◽  
Mei Su ◽  
Josep M. Guerrero
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Power Sharing ◽  
Droop Control ◽  
Islanded Microgrid

Improved reactive power sharing with adaptive droop control in islanded microgrids

2016 ◽  
Author(s):  
Javad Fattahi ◽  
Joan E. Haysom ◽  
John Cook ◽  
Karin Hinzer ◽  
Henry Schriemer
Keyword(s):  
Reactive Power ◽  
Power Sharing ◽  
Droop Control
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