Distributed Absorption and Half-Search Approach for Economic Dispatch Problem in Smart Grids

Li, Bo; Zhang, Panpan; Li, Xiangjun; Cao, Sheng

doi:10.3390/en12081527

Cited by 2 publications

(3 citation statements)

References 46 publications

(59 reference statements)

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“…In [24], considering the communication between generation unit and load unit, and taking the incremental cost of a generation unit and the incremental benefit of a flexible load as consensus variables, a consensus algorithm based on the feedback of supply-demand mismatch was proposed to solve the energy management problem of a microgrid. In [25], a novel, distributed approach for the economic dispatch problem was proposed; a flooding-based consensus approach was applied. A consensus algorithm was utilized in [26] to estimate local information in a distributed way; the saddle point method was also combined with it to dynamically seek the optimal solution to the ED problem, and the algorithm's stability was analyzed by Lyapunov stability theory.…”

Section: Introductionmentioning

confidence: 99%

Distributed Dynamic Economic Dispatch of an Isolated AC/DC Hybrid Microgrid Based on a Finite-Step Consensus Algorithm

Zong

et al. 2019

Energies

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The AC/DC hybrid microgrid is the main trend of microgrids’ development, and the dynamic economic dispatch is regarded as an important way to ensure the economic and safe operation of a microgrid system. In this paper, a dynamic economic dispatch model of the isolated AC/DC hybrid microgrid is developed with the objective of minimizing the daily operation cost of controllable units. Furthermore, a distributed algorithm based on the finite-step consensus algorithm is proposed, in which the incremental cost of each distributed generation unit is set as a consensus variable, and all units obtain the optimal values by exchanging information only with their neighbors. In addition, the algorithm converges to the optimal solutions in finite steps, and the efficiency is improved significantly. The effectiveness of the proposed model and the algorithm were verified by simulation.

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Section: Introductionmentioning

confidence: 99%

Distributed Dynamic Economic Dispatch of an Isolated AC/DC Hybrid Microgrid Based on a Finite-Step Consensus Algorithm

Zong

et al. 2019

Energies

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“…There is no detail about how such dispatch information is relayed. For instance, an EMS algorithm may be run, and as a result, storage needs to start discharging [16]. How this information will be sent from the EMS controller to the storage device is not discussed.…”

mentioning

confidence: 99%

“…It is assumed that there is a reliable and functioning communication solution that will enable transmission of such messages. There is some literature which focuses on developing communication architecture for an EMS [16][17][18]. However, these only focus on the information model development and not real implementations.…”

mentioning

confidence: 99%

Secure Communication Modeling for Microgrid Energy Management System: Development and Application

Ustun¹,

Hussain²

2019

Energies

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As the number of active components increase, distribution networks become harder to control. Microgrids are proposed to divide large networks into smaller, more manageable portions. The benefits of using microgrids are multiple; the cost of installation is significantly smaller and renewable energy-based generators can be utilized at a small scale. Due to the intermittent and time dependent nature of renewables, to ensure reliable and continuous supply of energy, it is imperative to create a system that has several generators and storage systems. The way to achieve this is through an energy management system (EMS) that can coordinate all these generators with a storage system. Prior to on-site installation, validation studies should be performed on such controllers. This work presents a standardized communication modeling based on IEC 61850 that is developed for a commercial microgrid controller. Using commercial software, different terminals are set up as intelligent electronic devices (IEDs) and the operation of the EMS is emulated with proper message exchanges. Considering that these messages transmit sensitive information, such as financial transactions or dispatch instructions, securing them against cyber-attacks is very important. Therefore; message integrity, node authentication, and confidentiality features are also implemented according to IEC 62351 guidelines. Real-message exchanges are captured with and without these security features to validate secure operation of standard communication solution.Energies 2020, 13, 68 2 of 14 time-dependent generation profile of these systems require storage systems and coordination to supply reliable energy [8].To address this gap, equipment that can track several generators and the load within a microgrid to coordinate charging and discharging of a battery energy storage system (BESS) has been developed [9]. The energy management system (EMS) needs to follow the load profile in a microgrid, estimate generation profile of the generators, and keep the battery charge at an appropriate level [10]. In addition, EMS is responsible for responding to system disturbances, such as generator loss or frequency deviation, to ensure the operation is as smooth as possible [11].All these capabilities need to be integrated over a standard communication infrastructure for interoperability between different equipment. These are required to monitor the current status of the power network and to notify new operating conditions from EMS. There are many EMS algorithms in the literature [12][13][14][15]. However, these works only focus on the development and solution of an optimization equation. There is no detail about how such dispatch information is relayed. For instance, an EMS algorithm may be run, and as a result, storage needs to start discharging [16]. How this information will be sent from the EMS controller to the storage device is not discussed. It is assumed that there is a reliable and functioning communication solution that will enable transmission of such messages. There is ...

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Distributed Absorption and Half-Search Approach for Economic Dispatch Problem in Smart Grids

Cited by 2 publications

References 46 publications

Distributed Dynamic Economic Dispatch of an Isolated AC/DC Hybrid Microgrid Based on a Finite-Step Consensus Algorithm

Distributed Dynamic Economic Dispatch of an Isolated AC/DC Hybrid Microgrid Based on a Finite-Step Consensus Algorithm

Secure Communication Modeling for Microgrid Energy Management System: Development and Application

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