A Two-Stage Flexibility-Oriented Stochastic Energy Management Strategy for Multi-Microgrids Considering Interaction With Gas Grid

Tavakkoli

et al. 2022

IEEE Systems Journal

Self Cite

Power systems are undergoing significant transformations due to the introduction of microgrids (MGs) and distributed energy resources (DERs). In this regard, MGs as new entities in the system facilitate the integration of independently operated DERs to the power system. In this structure, DERs would be operated by independent agents, while the microgrid's control unit (MCU) would coordinate agents' resource scheduling to maximize social welfare. In this structure, the uncertainty of resources operated by agents could lead to real-time energy imbalance in the MG resulting in agents' loss of profits. Consequently, a novel transactive-based-scheme is developed in this article to facilitate flexibility service exchange between the agents to minimize the realtime energy imbalance in the MG. In this context, MCU provides independent agents with bonuses as transactive signals to exploit their operational scheduling while addressing privacy concerns. The proposed framework increases the overall social welfare as well as minimizes the dependence of the MG on the upper-level system to ensure the demand-supply balance in the MG. Finally, this scheme is implemented on an MG with a multiagent structure to investigate its effectiveness in minimizing the real-time energy imbalance in the system.

Section: Resultsmentioning

confidence: 99%

A Transactive-Based Control Scheme for Minimizing Real-Time Energy Imbalance in a Multiagent Microgrid: A CVaR-Based Model

Tavakkoli

et al. 2022

IEEE Systems Journal

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“…Introduction of privatization has resulted in the development of multi-microgrid (multi-MG) structures in DNs which could facilitates integrating LRSs into the network. However, the development of multi-MG DNs would limit the direct access of the DSO over the LRSs scheduling in the network [8], [9]. In this regard, the developed centralized approach in [1] for intense-ramping management in DN may not be applicable in decentralized DNs.…”

Section: Introductionmentioning

confidence: 99%

A Distributed Framework for Intense Ramping Management in Distribution Networks

Fotuhi‐Firuzabad

et al. 2023

IEEE Trans. Smart Grid

High-penetration of renewable energy sources (RESs) in power networks has resulted in new operational challenges in the system. Accordingly, due to the uncertainty as well as variability of power-outputs of RESs, the flexibility ramping capacity of the system should be improved. Accordingly, system operators would rely on local responsive resources (LRSs) in distribution networks (DNs) to guarantee the demand-supply balance in each area of the system and minimize its associated ramping requirements. Nevertheless, the introduction of multimicrogrid (multi-MG) structures would limit the direct-access of system operators over the LRSs scheduling. As a result, this paper aims to develop a novel framework for intense-ramping management in multi-MG systems to settle the demand-supply gap in the system while addressing the distributed nature of the network. Respectively, alternating direction method of multipliers (ADMM) is employed to develop a decentralized coordination scheme in the system. Moreover, transactive energy control signals are utilized in the context of the ADMM-algorithm in order to exploit the LRSs scheduling to address the ramping constraints of the overall system. Lastly, the scheme is simulated on 37-bus and 123-bus DNs to analyze its efficacy in the management of intense ramping conditions in multi-MG DNs.

“…This study demonstrates the importance of dynamic pricing in impeding the volatile-rampup in distribution networks. Moreover, utilizing the flexibility capacity of local resources in microgrids in order to address the volatile-ramp in an MMS is investigated in [24]- [27]. Nevertheless, the offered models in [24]- [27] are relied on transferring the information associated with the operational characteristics of independent local resources to the central operator, which could cause privacy risks.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, utilizing the flexibility capacity of local resources in microgrids in order to address the volatile-ramp in an MMS is investigated in [24]- [27]. Nevertheless, the offered models in [24]- [27] are relied on transferring the information associated with the operational characteristics of independent local resources to the central operator, which could cause privacy risks. It is noteworthy that the studies conducted on [22]- [28] show the key role that local flexible resources could play in impeding the volatile-ramp-up in distribution networks.…”

Section: Introductionmentioning

confidence: 99%

“…Despite several research works, which have been conducted in the context of the efficient operation of distribution networks, flexibility service activation of local resources [11], [16], [17], and ramp-up minimization [1], [4], [22]- [24]; to the best of the authors' knowledge, flexible-ramp-up controlling considering distributed nature of MMSs has not yet been thoroughly investigated in the previously offered methodologies. Motivated by the aforementioned facts, this article aims to propose a novel transactive technique to facilitate the contribution of local flexible resources directed by independent microgrids in decreasing the load variability seen by the transmission system.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Incentive-Based Flexible-Ramp-Up Management in Multi-Microgrid Distribution Systems

Fotuhi‐Firuzabad

et al. 2022

IEEE Systems Journal

Self Cite

The increasing integration of renewable energy resources (RERs) and the expansion of multi-microgrid systems have transformed the operational condition of power systems. Respectively, the high-amount installation of RERs could result in the volatile changes exchanged-power of local systems, when their power generation drops suddenly. Nevertheless, the available ramp-up power for compensating the supply-demand gap in the power system could be limited due to the operational constraints of power networks and generation units. As a result, in this article, a transactive flexible-ramp-up-management-mechanism is offered in order to enable system operators to exploit the scheduling of microgrid systems with the aim of ensuring power requirements of the multi-microgrid system meet the flexible-ramp-up constraints. Therefore, the mechanism would result in the efficient rescheduling of local flexible resources in a multi-microgrid distribution system in order to address the ramp-up constraints in the system. The offered mechanism limits the information exchange between microgrids and the system operator to transactive control signals and accumulated power exchanges to impede privacy concerns of independently operated entities. Lastly, the recommended mechanism is implemented on the IEEE-37-bus test system, where, its effectiveness in addressing the overall system flexible-ramp-up limitations is investigated.