Power Scheduling of Distributed Generators for Economic and Stable Operation of a Microgrid

Ahn, Seon-Ju; Nam, Soon-Ryul; Choi, Joon-Ho; Moon, Seung-Il

doi:10.1109/tsg.2012.2233773

Cited by 189 publications

(117 citation statements)

References 19 publications

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“…The time-stepping characteristics of BEs and EVs are considered in (19) and (20). Equation (18) guarantees that charging EVs and discharging EVs cannot coexist.…”

Section: Der Dispatch Testmentioning

confidence: 99%

“…In terms of optimal power dispatch for the islands (microgrids), the variability of loads and DGs during the partition period are commonly considered [15][16][17][18]. In [15], the DGs are separated into two ownership groups-utilities and independent power producers-and only the utilityowned DGs with battery energy storage systems are expected to be controllable.…”

Section: Introductionmentioning

confidence: 99%

“…Functionality to manage island storage considering the integration of EVs and responsive loads to achieve power balance are proposed in [16]. In [17,18], stable operation in islanded mode is considered as a constraint during grid-connected operation. The objective of islanded operation in [17] is to minimize power mismatches, while [18] pays more attention to power flow limits.…”

Section: Introductionmentioning

confidence: 99%

“…In [17,18], stable operation in islanded mode is considered as a constraint during grid-connected operation. The objective of islanded operation in [17] is to minimize power mismatches, while [18] pays more attention to power flow limits. The economic dispatch model is applied for gridconnected operation in both [17,18].…”

Section: Introductionmentioning

confidence: 99%

“…The objective of islanded operation in [17] is to minimize power mismatches, while [18] pays more attention to power flow limits. The economic dispatch model is applied for gridconnected operation in both [17,18]. Both island partition and the static power dispatch are considered in [19].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Integrated approach for optimal island partition and power dispatch

Zhu

Jiang

et al. 2017

J. Mod. Power Syst. Clean Energy

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Operating in island mode when failure occurs in the active distribution network(ADN) is an effective measure to maintain an uninterrupted power supply to significant loads. A two-stage approach that integrates optimal island partition and power dispatch is proposed in this paper, considering photovoltaics (PVs), batteries (BEs) and electric vehicles (EVs) as the power sources. In the first stage, energy indices are defined to describe the energy demand and the maximum energy that these distributed energy resources (DERs) can provide, and islands are partitioned based on an energy constraint. Considering the variability the loads and PVs, the energy constraint is a necessary but not sufficient condition for island operation, so in the second stage, a power dispatch model is proposed as a test for the island partition result. Sequential power flow is also simulated to guarantee a feasible and optimized island status. The situations when the tests are not passed are analyzed and classified, and corresponding modifications for the first stage model are provided. Multiple levels of constraints based on the energy index are established for the island partition model. The proposed approach has been validated through simulation using a modified IEEE 69-bus system which is divided into three districts with different load variability characteristics.

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“…The time-stepping characteristics of BEs and EVs are considered in (19) and (20). Equation (18) guarantees that charging EVs and discharging EVs cannot coexist.…”

Section: Der Dispatch Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Integrated approach for optimal island partition and power dispatch

Zhu

Jiang

et al. 2017

J. Mod. Power Syst. Clean Energy

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Cost reduction in microgrid using demand response program of loads and uncertainty modeling with point estimation method

Rajamand

2019

Int Trans Electr Energ Syst

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Summary Uncertainty in microgrid causes degradation in load supporting and stability of the system. The origin of uncertainty may be from renewable distributed generators (DGs), market price, load demand, and other issues. To compensate for this problem, energy storage system (ESS) and demand response (DR) program are applied in microgrid energy management process. ESS is used as a reserve energy and DR is defined as cooperation of users on demand side of microgrid. DR is done in two forms: one is based on load reduction of users due to the price tariffs called price‐based DR and the second is DR based on incentive payment to customers for load reduction especially in peak times named as incentive‐based DR. In this article, price‐based DR and three types of load as industrial, commercial and house load are considered with three DR features to cooperate in energy management. Moreover, the uncertainty of renewable DGs, market price and load demand are modeled and estimated by point estimation method (PEM). Simulation results are performed in three scenarios including initial battery charge and the possibility of being off‐state of some DGs in stochastic medium with and without DR program and the results are compared in these scenarios. The effect of DR on microgrid cost is investigated using these scenarios where the influence of DR on the total cost reduction is observable in the studied microgrid.

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Smart microgrid optimal scheduling with stable and economic islanding capability using optimal load contribution as spinning reserve

Sefidgar‐Dezfouli

Davatgaran

2020

Int Trans Electr Energ Syst

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Summary Microgrids (MGs) can operate in two modes: grid‐connected and islanded. Islanding can be scheduled or unintentional. MG should be able to maintain its stability in case of unintentional islanding. Therefore, it is necessary to provide the required spinning reserve for stable islanding. In this paper, a two‐stage scheduling strategy is proposed to determine the required reserve for stable islanding by considering uncertainties of load and renewable generations. The proposed strategy uses advantages of the load as a reserve provider to compensate the deficiency of DGs and batteries in providing the required reserve. A novel objective function is proposed to determine the optimal amount of demand which considered as reserve. The objective function minimizes the sum of reserve preparation costs, expected cost of calling load reserve, and expected cost of emergency load curtailment. Another significant feature of the proposed model is its modularity that enables the model to be integrated with any other scheduling model. The effectiveness of the proposed model is evaluated by mathematical analysis and numerical simulations.

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Power Scheduling of Distributed Generators for Economic and Stable Operation of a Microgrid

Cited by 189 publications

References 19 publications

Integrated approach for optimal island partition and power dispatch

Integrated approach for optimal island partition and power dispatch

Cost reduction in microgrid using demand response program of loads and uncertainty modeling with point estimation method

Smart microgrid optimal scheduling with stable and economic islanding capability using optimal load contribution as spinning reserve

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