Event-Based Distributed Active Power Sharing Control for Interconnected AC and DC Microgrids

Zhou, Jianyuan; Mu, Yunfei; Sun, Qiuye; Ma, Dazhong; Huang, Bonan

doi:10.1109/tsg.2017.2724062

Cited by 92 publications

(49 citation statements)

References 42 publications

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“…In the self-triggered approach, based on the last triggered data and dynamic of system, the next sampling time is predicted at the control updates [64]. On the other hand, the event-triggered technique requires some specific condition to trigger the sampling, and also continuous monitoring [65]. In [66][67][68][69], the application of an intrinsic aperiodic sampled data-based controller in power systems is suggested; however, there is lack of enough study on the application of this type of controller in microgrids.…”

Section: Aperiodic Sampling Data-based Control Methodsmentioning

confidence: 99%

Distributed Control Methods and Impact of Communication Failure in AC Microgrids: A Comparative Review

et al. 2019

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The objectives of this paper are to review and compare the distributed control methods in AC microgrids and also to identify the impact of communication failure on this type of the controller. The current AC microgrids are distinguished from the traditional power system topologies because of the high penetration of advanced control methods, measurements, sensors, power electronic devices, and communication links. Also, because of the increasing integration of renewable energy sources, control strategy for congestion management, frequency control, and optimal dispatch of microgrids has become more complicated. This paper explains the characteristics and features of distributed control systems and discusses the challenges of these approaches. In addition, a comprehensive review of the advantages and disadvantages of these techniques are explained in detail. On the other hand, the possible challenges, related to communication failure, noise, delay, and packet dropout on the operation of the distributed controller are presented, and several techniques, which reduce the impact of communication failure of the distributed controller, are compared. This comprehensive study on distributed control systems reveals the challenges in and future possible studies on this issue.

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Section: Aperiodic Sampling Data-based Control Methodsmentioning

confidence: 99%

Distributed Control Methods and Impact of Communication Failure in AC Microgrids: A Comparative Review

et al. 2019

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“…Synthesizing the linear droop Equations (12) and (13) between active power and frequency or voltage of DGs [20], the droop equation for the whole AC and DC microgrid can be expressed as:…”

Section: Control Theorymentioning

confidence: 99%

“…Synthesizing the linear droop Equations (12) and (13) between active power and frequency or voltage of DGs [20], the droop equation for the whole AC and DC microgrid can be expressed as: The droop control curves corresponding to (14) and (15) . Therefore, the input of AC/DC cooperative control is:…”

Section: Control Theorymentioning

confidence: 99%

A Cooperative Control Scheme for AC/DC Hybrid Autonomous Microgrids

Sheng

Hong

et al. 2020

Processes

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The AC/DC hybrid microgrid (MG) has been widely promoted due to its high flexibility.The capability to operate in islanding mode is an appealing advantage of the MG, and also sets higher requirements for its control system. A droop control strategy is proposed on account of its distinguishing feature of automatic power sharing between distributed generations (DGs), but it introduces some drawbacks. Therefore, distributed cooperative secondary control is introduced as an improvement. In order to optimize the active power sharing in AC/DC hybrid microgrids, a number of cooperative control strategies have been proposed. However, most studies of AC/DC hybrid microgrids have mainly focused on the control of the bidirectional converter, ignoring the effects of secondary control within subnets, which may make a difference to the droop characteristic. This paper extends the cooperative control to AC/DC hybrid microgrids based on normalizing and synthesizing the droop equations, and proposes a global cooperative control scheme for AC/DC autonomous hybrid microgrids, realizing voltage restoration within AC and DC subnets as well as accurate global power sharing. Ultimately, the simulation results demonstrate that the proposed control scheme has a favorable performance in the test AC/DC hybrid system. Processes 2020, 8, 311 2 of 15can realize the global optimization of MG effectively, but the high communication cost and low reliability in complex systems limit its development [5]. The proposal of the distributed control scheme [6,7] can effectively reduce the scale of data transmission, so as to realize the global control of the complex system with low communication cost. Dehkordi et al. [8] proposed a complete hierarchical control strategy for AC microgrids and Chunxia Dou et al.[9] designed a superior distributed cooperative controller for DC microgrids with commendable dynamic performance. Fanghong Guo et al. [10] designed an efficient secondary controller with the superiority of less information transmission and demonstrated its excellent performance in DC microgrids. These above−mentioned studies only focused on one separate microgrid, while the control of hybrid microgrids needs to consider the coordination between AC and DC systems, which will be more complex [11]. Considering that the fluctuation of transmission power may pose a threat to the system stability, constructing an appropriate control scheme for a bidirectional AC/DC converter to determine a befitting power flow is of great significance. Yu Ji et al. and Wenyan Hu et al. [12,13] both proposed a control method for the bidirectional converter, while they expressed the imbalance of power sharing indirectly by the deviation of voltage and frequency rather than establish a direct relationship between the active power of AC and DC subnets, thus may bring about inaccurate power sharing with the participation of secondary control within subnets. Xialin Li et al. [14] analyzed the operation mode of the bidirectional converter in different scenarios roundly and gen...

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“…Meanwhile, the consensus‐based droop control, focusing on the primary and secondary control for proper reactive power sharing, has been proposed . These control strategies ensure the reactive power sharing accurately and make the line impedance become mainly inductive and power angle become approximately zero . However, the power flow calculation that adopted the line characteristics of the microgrid with multi‐DRGs still remains a challenge, which has rarely been researched.…”

Section: Introductionmentioning

confidence: 99%

The equivalent impedance characteristic analysis of the AC microgrid and its decoupled power flow calculation

Wang

Sun

et al. 2019

Int Trans Electr Energ Syst

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Summary This paper analyzes the equivalent impedance characteristics of the ac microgrid with distributed renewable energy generations (DRGs) based on the droop control and proposes a decoupled power flow calculation method. The droop control strategy with adaptive virtual impedance has become an effective solution to utilize the DRG. To analyze the characteristics of the DRG, a microgrid consisting of multi‐DRGs based on distributed consensus‐based secondary voltage droop control with adaptive virtual impedance is researched. Considering the characteristics of the DRGs, a decoupled power flow calculation can be proposed to satisfy the quick power flow calculation in order to achieve economic dispatch and stability recovery for the microgrid. Furthermore, the accuracy of the power flow calculation with considering virtual impedance is improved. Moreover, a small microgrid, including three DRGs, has been modeled and simulated using the MATLAB/Simulink. Eventually, the decoupled power flow calculation is tested on three test case systems.

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Event-Based Distributed Active Power Sharing Control for Interconnected AC and DC Microgrids

Cited by 92 publications

References 42 publications

Distributed Control Methods and Impact of Communication Failure in AC Microgrids: A Comparative Review

Distributed Control Methods and Impact of Communication Failure in AC Microgrids: A Comparative Review

A Cooperative Control Scheme for AC/DC Hybrid Autonomous Microgrids

The equivalent impedance characteristic analysis of the AC microgrid and its decoupled power flow calculation

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