Distributed Generation Control Method for Active Power Sharing and Self-Frequency Recovery in an Islanded Microgrid

2017 ◽  
Vol 32 (1) ◽  
pp. 544-551 ◽  
Author(s):  
Yun-Su Kim ◽  
Eung-Sang Kim ◽  
Seung-Il Moon
Keyword(s):  
Distributed Generation ◽  
Control Method ◽  
Active Power ◽  
Power Sharing ◽  
Islanded Microgrid ◽  
Generation Control

scholarly journals A New Adaptive Control Strategy of active and reactive power sharing in Islanded Microgrids

2016 ◽  
Vol 19 (4) ◽  
pp. 14-34
Author(s):  
Phuong Minh Le ◽  
Duy Vo Duc Hoang ◽  
Hoa Thi Xuan Pham ◽  
Huy Minh Nguyen ◽  
Dieu Ngoc Vo
Keyword(s):  
Transmission Line ◽  
Distributed Generation ◽  
Reactive Power ◽  
Active Power ◽  
Power Sharing ◽  
Droop Control ◽  
Active And Reactive Power ◽  
Three Phase ◽  
Islanded Microgrid ◽  
Adaptive Control Strategy

This paper proposes a new control sharing method for parallel three-phase inverters in an islanded microgrid. The proposed technique uses adaptive PIDs combined with the communication among the parallel inverters to accurately share active power and reactive power among the inverters via adjusting the desired voltage if there is a distinct difference between line impedance and the load change in the microgrid. Moreover, the paper also presents the response ability of the inverters to maintain the error within the allowed limits as the transmission line is interrupted. The proposed technique has been verified in a microgrid with three parallel distributed generation-inverter units using Matlab/Simulink. In the simulation, as the droop control using the communication information among the inverters, the sharing errors for active power and reactive power are around 0.2% and 0.6%, respectively. As the connection between the microgrid and transmission line is interrupted, the sharing errors for active power and reactive power increase to 0.4% and 2%, respectively. The simulation results have indicated that the proposed technique is superior to the traditional droop control in terms of the accuracy and stability. Therefore, the new proposed technique can be a favor alternative model for active power and reactive power sharing control of parallel inverters in an islanded microgrid.

scholarly journals ANALYSIS OF ACTIVE HARMONIC COMPENSATION ALGORITHMS FOR GRID-CONNECTED PHOTOVOLTAIC INVERTERS / AKTYVUSIS HARMONIKŲ KOMPENSAVIMAS SAULĖS ELEKTRINIŲ TINKLO INVERTERIAIS – ALGORITMŲ ANALIZĖ

2014 ◽  
Vol 6 (2) ◽  
pp. 188-193
Author(s):  
Andrius Platakis
Keyword(s):  
Distributed Generation ◽  
Control Method ◽  
Active Power ◽  
Harmonic Compensation ◽  
Short Overview ◽  
Comparison Results ◽  
Active Harmonic Compensation

A review of various standards, concerning distributed generation, and different Active Harmonic Compensation (AHC) or Active Power Filtering (APF) methods are presented in this paper. Short overview of each control method is given. The experimentation results from various publications are taken into account evaluating the feasibility of an AHC algorithm to be integrated in a typical commercially available grid-connected Photovoltaic inverter. The comparison results are presented in a table. The results of this paper can be used for further investigation in deciding which particular algorithm to try to implement and experiment with. Pateikta standartų, taikomų paskirstytosioms elektrinėms jungti į žemos įtampos elektros skirstomuosius tinklus, apžvalga. Išnagrinėtas aktyvusis harmonikų kompensavimo (AHK) aspektas, esantis šiuose standartuose. Pateikti harmonikų limitai, kuriuos turi atitikti jungiamos į žemos įtampos elektros tinklą paskirstytosios elektrinės. Apžvelgti skirtingi AHK metodai, pateikta kiekvieno algoritmo analizė. Atsižvelgiant į galimybę AHK įgyvendinti šiuo metu komerciškai gaminamuose saulės elektrinių tinklo inverteriuose (SETI), tarpusavyje palyginti skirtingi AHK pagal algoritmų skaičiavimo intensyvumą, daviklių skaičių, topologiją, maksimaliai kompensuojamų harmonikų skaičių ir priklausomybę nuo apkrovos tipo.

Active Power Sharing and Frequency Recovery Control in an Islanded Microgrid With Nonlinear Load and Nondispatchable DG

2020 ◽  
Vol 14 (1) ◽  
pp. 1058-1068 ◽  
Author(s):  
Meysam Gheisarnejad ◽  
Hooman Mohammadi-Moghadam ◽  
Jalil Boudjadar ◽  
Mohammad Hassan Khooban
Keyword(s):  
Active Power ◽  
Power Sharing ◽  
Nonlinear Load ◽  
Islanded Microgrid

Frequency and State-of-Charge Restoration Method in a Secondary Control of an Islanded Microgrid without Communication

2020 ◽  
Vol 10 (5) ◽  
pp. 1558
Author(s):  
Jin-Oh Lee ◽  
Yun-Su Kim
Keyword(s):  
Distributed Generation ◽  
Control Method ◽  
State Of Charge ◽  
Secondary Control ◽  
Communication Devices ◽  
State Frequency ◽  
Integral Controller ◽  
Islanded Microgrid ◽  
Restoration Method ◽  
System Frequency

This paper presents a control method for inverter-interfaced distributed generation (DG) and energy storage systems (ESSs) in an islanded microgrid. The proposed method is focused on secondary control, particularly frequency restoration and maintaining the ESSs’ state of charge (SOC). To recover frequency deviation due to load change, an ESS is used as a droop-controlled grid-forming source. However, the grid-forming ESS cannot manage its own SOC, since it cannot control its own output power; hence, grid-feeding DGs are used to maintain the SOC within a desired range. Management of the SOC, as well as frequency restoration, is conducted by using local controllers without any communication devices, since dependency on communication may deteriorate system reliability in the case of failure. The proposed method for maintaining SOC can be realized by adjusting the system frequency, which is the only value that can be measured locally with almost the same value at every node in a steady state. Frequency restoration can be achieved by a simple ON/OFF scheme of the integral controller with a hysteresis loop to solve problems caused by differences between frequency measurements or set points among DGs.

scholarly journals A Nonlinear, Bounded and Lipchitz Continuous Distributed Active Power Sharing Control Method for Islanded AC Microgrids

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 36843-36853 ◽  
Author(s):  
Xiaoxiao Meng ◽  
Niancheng Zhou ◽  
Qianggang Wang ◽  
Josep M. Guerrero
Keyword(s):  
Control Method ◽  
Active Power ◽  
Power Sharing

scholarly journals Study and modelling of droop-controlled islanded mesh microgrids

2021 ◽  
Vol 280 ◽  
pp. 05015
Author(s):  
Youssef Hennane ◽  
Abdelmajid Berdai ◽  
Serge Pierfederici ◽  
Farid Meibody-Tabar ◽  
Vitaliy Kuznetsov
Keyword(s):  
Distributed Generation ◽  
Reactive Power ◽  
Control Method ◽  
Logical Consequence ◽  
Single Point ◽  
State Space Model ◽  
Power Sharing ◽  
Active And Reactive Power ◽  
High Penetration ◽  
Point Of Common Coupling

The active and reactive power sharing of distributed generation sources (DGs) connected to isolated microgrids with a single point of common coupling (mono-PCC) to which the loads are also connected has already been the subject of several studies. A high penetration rate of DGs based on renewable energies has as a logical consequence the development and implementation of mesh and more complex multi- PCC microgrids. In this paper, a developed droop control method for synchronization and power sharing between different DGs connected to a mesh islanded multi-PCC microgrid with many distributed generation sources (DGs) and different type of loads (including active load (CPL)) randomly connected to different PCCs is applied. Then, a state model of the entire mesh microgrid is developed integrating the generators with their controllers, power lines, droop algorithms and dynamic loads. This model is then used to study the asymptotic stability and robustness properties of the system. The simulation results confirm the effectiveness of the applied strategies for the synchronization of the different DGs to the microgrid while ensuring an efficient active and reactive power sharing. also, they confirm the validity of the developed state space model of the system.

scholarly journals Distributed fixed-time cooperative control of an islanded microgrid under event-triggered mechanism

2021 ◽  
Author(s):  
Deming Xu ◽  
Ze Li ◽  
Guozeng Cui ◽  
Wanjun Hao ◽  
Fuyuan Hu
Keyword(s):  
Cooperative Control ◽  
Fixed Time ◽  
Active Power ◽  
Settling Time ◽  
Power Sharing ◽  
Control Approach ◽  
Time Control ◽  
Islanded Microgrid ◽  
Control Protocols ◽  
Event Triggered

Abstract The secondary cooperative control problem of an islanded microgrid through event-triggered mechanism is investigated in this paper. A distributed fixedtime secondary cooperative control strategy is proposed to obtain frequency and voltage magnitude secondary restoration, and also a proportional active power sharing under an undirected topology. We consider a centralized event-triggered mechanism to alleviate the communication burden and reduce the frequency of controllers update. Through this mechanism, the distributed fixed-time control protocols using frequency, voltage magnitude and active power sampling measurement values of distributed generations (DGs) only when the predefined event-triggered condition is satisfied. Compared with the conventional distributed asymptotic control protocols under period-triggered communication, the secondary control objectives of an islanded microgrid are achieved within a fixed settling time by applying the presented distributed fixed-time control approach, and the upper bound of settling time is unrelated to any initial states. Meanwhile, the presented centralized event-triggered communication method exhibits excellent performance in alleviating communication burden and promoting control efficiency. The theoretical proof is given by adopting Lyapunov method. The simulation studies are conducted to illustrate the effectiveness of the proposed control scheme.

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