Impact of emergency diesel generator reliability on microgrids and building-tied systems

Marqusee, Jeffrey; Ericson, Sean; Jenket, Don

doi:10.1016/j.apenergy.2021.116437

Cited by 24 publications

(8 citation statements)

References 19 publications

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“…Other events, like DER failures, also degrade system reliability and further complexify calculations of reliability. Assuming perfect DER reliability, as studies often do, leads to overestimates of system reliability, in particular during long-duration outages when DERs serve as the last line of defense against outage (Marqusee et al, 2021a(Marqusee et al, , 2021b. In addition, some DERs are energy-limited, others depend on weather, and many must be routinely removed from service for maintenance.…”

Section: Ll Open Accessmentioning

confidence: 99%

“…However, to treat outages and reliability they require a number of simplifying linearizations and are commonly parameterized with assumptions of perfect DER reliability or a single prescribed (e.g., average) grid outage frequency and duration (Marnay et al, 2008) (Simpkins et al, 2014). It is known that these simplifications introduce inaccuracies in model results for optimal investment and resilience benefits (Marqusee et al, 2021a(Marqusee et al, , 2021b. More detailed reliability calculations can be made aside linear models, for example, via pre-processing (Laws et al, 2018) or post-processing (Mishra et al, 2021) routines that permit simulation of a wider array of moderate and long-duration outages, parameterized with full pdfs, or that ensure resilience constraints are met.…”

Section: Ll Open Accessmentioning

confidence: 99%

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Designing resilient decentralized energy systems: The importance of modeling extreme events and long-duration power outages

Hanna

Marqusee

2022

iScience

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Mitigating and adapting to climate change requires decarbonizing electricity while ensuring resilience of supply, since a warming planet will lead to greater extremes in weather and, plausibly, in power outages. Although it is well known that longduration outages severely impact economies, such outages are usually not well characterized or modeled in grid infrastructure planning tools. Here, we bring together data and modeling techniques and show how they can be used to characterize and model long-duration outages. We illustrate how to integrate outages in planning tools for one promising mode of resilient energy supply-microgrids. Failing to treat these extremes in models can lead to microgrid designs (1) that do not realize their full value of resilience, since models do not see the benefits of protecting against extremes, and (2) that appear reliable on paper yet do not actually protect against extremes. Although utilities record power interruptions, lack of access to that data is hindering research on resilience; making datasets available publicly would substantially aid efforts to improve grid planning tools.

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Section: Ll Open Accessmentioning

confidence: 99%

Section: Ll Open Accessmentioning

confidence: 99%

Designing resilient decentralized energy systems: The importance of modeling extreme events and long-duration power outages

Hanna

Marqusee

2022

iScience

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“…Marqusee and Jenket (Marqusee and Jenket, 2020) only analyzed the continuous run time reliability of single emergency diesel generators during a grid outage through additional metrics. At the regional level, most of the EPSs are still considered as a component of the grid, only calculating its capacity into the formula (Marqusee, et al, 2021b;Xiang, 2017).…”

Section: Literature Reviewmentioning

confidence: 99%

“…However, there is less research on the contribution of the EPS itself to reliability improvement of the power supply system (Marqusee, et al, 2021b). As the only power supply facility in case of power outages, EPS is specialized.…”

Section: Literature Reviewmentioning

confidence: 99%

Reliability and cost analysis of the integrated emergency power system in building complex

Zhang¹,

Yang²,

Li³

et al. 2021

Energy Exploration & Exploitation

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Emergency power system refers to a system that is composed of self-generating equipment in the building. By providing power support for emergency events such as power outages, it can keep the energy safety assurance. Usually, emergency power systems are independent and redundant. As a backup, their utilization rates are extremely low, resulting in excessive redundancy causing a lot of waste of resources and equipment. In this paper, a model integrating stand-alone emergency power systems with micro-network was proposed to improve power supply reliability in a more economic manner. Integrated emergency power system with the dispatch strategy of self-priority was established based on reliability and power demand of buildings simulated through Monte Carlo method. To evaluate the impact of integration, the total cost of integrated emergency power system was calculated including economic loss during power outages and system costs. Finally, genetic algorithm was used to obtain the optimal capacity and dispatch strategy of the integrated emergency power system by minimizing the total cost. Results showed that the reliability was improved, and the total cost was reduced to 80.05% by integrated emergency power system in the illustrated case.

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“…The research works presented in [9], [10], [11] and [12] demonstrate existing microgrids integrated with DG to increase the supply reliability in isolated and offgrid systems. Similarly, [13,14] highlight the strategic importance of DG for meeting critical loads such as schools, hospitals etc. which demand uninterrupted power supply during a grid outage.…”

Section: Introductionmentioning

confidence: 99%

DOBC-Based Frequency & Voltage Regulation Strategy for PV-Diesel Hybrid Microgrid During Islanding Conditions

Grover¹,

Verma²,

Bhatti³

2022

Preprint

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This paper proposes a disturbance observer-based control (DOBC) method for frequency and voltage regulation of a solar photovoltaic (PV)-diesel generator (DG) based hybrid microgrid during islanding conditions. The DOBC is integrated as a feed-forward control to the synchronous generator based DG, which handles real-time power mismatches and regulates the microgrid frequency and voltage under islanding. To substantiate the operational robustness of the developed controller under real-time uncertainties arising due to variability in PV output and load, the controller has been tested under worstcase uncertainty conditions. The proposed controller has been developed as a MATLAB/Simulink model and the results are validated on the real-time simulator OPAL-RT. The effectiveness of the proposed control scheme has further been validated in the presence of communication delays and noisy load conditions. Results verify the dynamic performance of the controller in regulating the system frequency and voltage for low-inertia microgrids. Finally, the proposed control strategy has been implemented on laboratory scale microgrid setup in which synchronous generator based diesel generator regulates system frequency fast and efficiently under worst case uncertainty scenario.

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Impact of emergency diesel generator reliability on microgrids and building-tied systems

Cited by 24 publications

References 19 publications

Designing resilient decentralized energy systems: The importance of modeling extreme events and long-duration power outages

Designing resilient decentralized energy systems: The importance of modeling extreme events and long-duration power outages

Reliability and cost analysis of the integrated emergency power system in building complex

DOBC-Based Frequency & Voltage Regulation Strategy for PV-Diesel Hybrid Microgrid During Islanding Conditions

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