Probabilistic Resilience of DER Systems - A Simulation Assisted Optimization Approach

Abstract

Energy systems resilience is becoming increasingly important as the frequency of major grid outages increases. In this work, we present a methodology to optimize a behind-the-meter distributed energy resource system to sustain a site's critical loads during a pre-defined utility outage period. With the fixed system design, we then propose an outage simulation approach to estimate the resilience potential of the DER system to sustain loads beyond the fixed outage perioda yearlong resilience performance analysis. We apply statistical analysis to assess the system's resilience performance over a broader parametric problem space on an hourly, monthly, and yearly basis. We present a case study to demonstrate the impact of the pre-defined outage period on the resilience performance of the system. The case study shows that the probability of surviving a random outage of a given duration changes from 20% to 95% when the outage is modeled for a weekday instead of a weekend for the case study building.

Optimal Microgrids in Buildings with Critical Loads and Hybrid Energy Storage

“…In comparison to previous specific studies focusing on the analysis of power outages using DER systems and the REopt web tool [55] as analysis tools, the present paper presents an evaluation of the economic and technical feasibility of the use of DERs to improve the resilience of critical buildings and, at the same time, enhance the use of alternative energy sources, distributed generation, and energy storage. Instead of fixing a system design and an outage period to simulate and calculate the resilience potential of a DER system to supply fixed loads in the outage period, this study analyzed specific building typologies with critical loads.…”

“…Still, there need to be particular case studies of the influence of load profiles, tariff structures, and available solar radiation impacts on energy costs and carbon emissions in buildings with critical loads and of the impacts on resilience. The study performed by Mishra and Anderson [55] is the most relevant application of the REopt web tool in this research field. The authors presented a fixed design approach and proposed the simulation of an outage to calculate resilience improvement using DER systems.…”

Resilient power grid for smart city

“…Furthermore, the exploitation of other urban components' behaviors to inform the design of the physical system and the cyber system to ultimately enhance the resilience of CPS is introduced in ref. [144]. CPS technologies is developing fast now, making the resilience enhancement of CPS in smart city more safe, efficient, and economical.…”

Outage Survivability Investigation of a PV/Battery/CHP System in a Hospital Building in Texas

“…The number of hours that a system has survived an outage is represented by each value in an array of length 8760 for hourly analysis, denoted by r, where individual value in the array represents the total survival hours of the system for the outage beginning in the [index + 1] ith hour. The probabilities of survival for outages of different durations are computed using the following formula (Equation ( 24)) after computing the survived outage duration's (or r) series [25].…”