Decentralized Power Flow Control Strategy Using Transition Operations of DC-Bus Voltage for Detection of Uncertain DC Microgrid Operations

Jabbar, M.A.; Tran, Dat Thanh; Kim, Kyeong-Hwa

doi:10.3390/su151511635

Cited by 1 publication

(3 citation statements)

References 34 publications

(38 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…V denotes the converter reference voltage and i d denotes the converter duty ratio of power agent i. Unlike the conventional droop controllers [30,31], the proposed control strategy only utilizes the primary controller that consists of voltage and current controls to minimize computational burden. The primary controller consists of two cascaded PI controllers for voltage control and current control, as shown in Figure 3.…”

Section: Figure 1 Configuration Of a Dcmgmentioning

confidence: 99%

“…In NO 1 ~NO 9 , the load agent operates in the normal mode, which indicates that the load agent is connected to the DCMG system without load shedding [31,32,39]. In this paper, the electricity price condition is determined via the real-time pricing (RTP) method as an electricity pricing policy [30,31]. While the steady-state operation modes NO 1 ~NO 6 represent the grid-connected modes, NO 7 ~NO 9 represent the islanded modes when the grid agent is disconnected to the DCMG.…”

Section: ˆ( )mentioning

confidence: 99%

“…In contrast, if the DCV increases from the nominal DCV value, it means that there is power surplus in the DCMG system. Traditionally, the droop control strategy is employed in decentralized DCMG systems to control the DCV to the nominal value [27][28][29][30][31]. In the study in [29], DCMG power balance is achieved by using a voltage-current (V-I) droop controller according to the DCV level.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Continuous Power Management of Decentralized DC Microgrid Based on Transitional Operation Modes under System Uncertainty and Sensor Failure

Jo,

Tran,

Jabbar

et al. 2024

Sustainability

Self Cite

View full text Add to dashboard Cite

Continuous power management for a decentralized DC microgrid (DCMG) is proposed in this study to achieve power balance and voltage regulation even under system uncertainty and voltage sensor failure. The DCMG system achieves continuous power management through only the primary controller to reduce the computational burden of each power agent. To enhance the reliability and resilience of the DCMG system under DC bus voltage (DCV) sensor failure, a DCV sensor fault detection algorithm is suggested. In this algorithm, DCV sensor failure is detected by comparing the measured DCV with the estimated DCV. If power agents identify the failure of the DCV sensor, it changes the operation properly according to the proposed control mode decision algorithm to guarantee the stability of the DCMG system. When uncertain conditions like sudden grid disconnection, DCV sensor failure, electricity price change, power variation in distributed generations, and critical battery status occur, the DCMG system is changed to transitional operation modes. These transitional operation modes are employed to transmit the power agent information to other agents without digital communication links (DCLs) and to accomplish power sharing even under such uncertain conditions. In the transitional operation modes of the DCMG system, the DCV levels are temporarily shifted to an appropriate level, enabling each power agent to detect the uncertainty conditions, and subsequently to determine its operation modes based on the DCV levels. The reliability and effectiveness of the proposed control strategy are confirmed via various simulation and experimental tests under different operating conditions.

show abstract

Section: Figure 1 Configuration Of a Dcmgmentioning

confidence: 99%