Performance indicators for microgrids during grid-connected and island operation

Bollen, M.H.J.; Samuelsson, Olof; Björnstedt, Johan

doi:10.1109/ptc.2009.5282118

Cited by 26 publications

(20 citation statements)

References 5 publications

(6 reference statements)

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“…The deviations in the frequency can be seen at the time when the distribution grid is disconnected from the transmission grid and these deviations are controlled within very short periods by using the developed controllers. Even though the developed controllers have ensured the controlled operation of the islanded MG, the islanded operation of the MG is not as efficient as that of the grid connected operation [27], and batteries run out of energy since they discharge in a relatively short time. Therefore, the islanded portion of the CIGRE network must be reconnected to the grid.…”

Section: Simulation Resultsmentioning

confidence: 99%

Controlled Operation of the Islanded Portion of the International Council on Large Electric Systems (CIGRE) Low Voltage Distribution Network

2017

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Abstract:In islanding, a portion of the power network, comprised of the loads and distributed generation (DG) units, is isolated from the rest of the power grid and forms a micro grid (MG). In this condition, it becomes essential for the islanded MG to operate in a stable and controlled manner by providing ancillary services. When the MG is cut off from the main grid, the islanding must be detected by the DG units. In this condition it is essential that one of the controllers should be switched to the voltage-frequency (VF) control mode. In islanding, the network loses it slack reference and this reference is established by a VF controller. The voltage and the frequency of the islanded MG deviate when disconnected from the transmission grid and these deviations are caused by the load-generation imbalance. The voltage and the frequency of the islanded MG can be restored to the permissible limits if the desired/exceeded amount of active and reactive power is injected/absorbed by the locally available sources in islanded MG. This paper proposes a control strategy which can compensate the voltage and the frequency deviations in the islanded portion of the International Council on Large Electric Systems (CIGRE) low voltage distribution network by using advanced power electronics devices such as STATCOMs) for Photovoltaic (PV) Units and Battery Energy Storage Systems (BESS) STATCOMs (for battery units). The selection of the VF controller for the most suitable DG unit of this test network is also presented in this paper, and the effectiveness of the controllers is verified by presenting simulation results using DIgSILENT (DIgSILENT GmbH, Gomaringen, Germany) power factory software version 15.0.

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Section: Simulation Resultsmentioning

confidence: 99%

Controlled Operation of the Islanded Portion of the International Council on Large Electric Systems (CIGRE) Low Voltage Distribution Network

2017

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“…SFS using positive feedback by creating to some extent uneven phase angle at inverter output current through adding up truncations or dead times to the current waveform [23,25]. The chopping fraction (cf ) expressed in Eq.…”

Section: Sandia Frequency Shift (Sfs)mentioning

confidence: 99%

An Analytical Survey of the Islanding Detection Techniques of Distributed Generation Systems

Khichar

Lalwani

2018

Technol Econ Smart Grids Sustain Energy

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This paper provides an analytical survey of the islanding detection techniques for the distributed generation systems. Islanding phenomena on takes place when the power supply from the main utility is intermittent due to numerous reasons, but the distributed generation keeps supplying power into the distribution networks. Islanding can be dangerous to workers and electrical equipment, even the power grid. Therefore, islanding detection is the priority among priorities. Islanding detection is a precondition of two working modes switching for distributed generation. In this paper, a detailed description followed by the classification of the islanding detection techniques has been made based on features, such as detection time, size of non-detection zone, power quality disturbances, system cost and operation under multiple distributed generation units. The merits and demerits of islanding detection methods are analyzed and summarized in this paper. In this manner, the greatest detection outcome can be achieved by exploiting the merits of each method. This paper is aimed to serve as a convenient reference and guidance value for deciding the islanding detection method for future islanding users in distributed generation system.

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“…The small size of microgrids makes the operation more challenging, with physical implications for the performance of the power system. Load changes are large relatively to the total load, making frequency control more challenging (Bollen et al, 2009). …”

Section: Microgrid Operationmentioning

confidence: 99%

Multiagent System Architecture for Short-term Operation of Integrated Microgrids

Ghazvini

Abedini

Pinto

et al. 2014

IFAC Proceedings Volumes

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Abstract:The forthcoming smart grids are comprised of integrated microgrids operating in grid-connected and isolated mode with local generation, storage and demand response (DR) programs. The proposed model is based on three successive complementary steps for power transaction in the market environment. The first step is characterized as a microgrid's internal market; the second concerns negotiations between distinct interconnected microgrids; and finally, the third refers to the actual electricity market. The proposed approach is modeled and tested using a MAS framework directed to the study of the smart grids environment, including the simulation of electricity markets. This is achieved through the integration of the proposed approach with the MASGriP (Multi-Agent Smart Grid Platform) system.

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Performance indicators for microgrids during grid-connected and island operation

Cited by 26 publications

References 5 publications

Controlled Operation of the Islanded Portion of the International Council on Large Electric Systems (CIGRE) Low Voltage Distribution Network

Controlled Operation of the Islanded Portion of the International Council on Large Electric Systems (CIGRE) Low Voltage Distribution Network

An Analytical Survey of the Islanding Detection Techniques of Distributed Generation Systems

Multiagent System Architecture for Short-term Operation of Integrated Microgrids

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