Reliability evaluation oriented dominant dynamic characterization of park-level integrated energy system.

Area of Science:

• Energy Systems Engineering
• Reliability Engineering
• Environmental Science

Background:

• Park-level integrated energy systems (PIES) involve complex, multiscale dynamic interactions between electricity, gas, thermal, and building subsystems.
• Existing reliability evaluations often overlook critical transient responses and the long-term human health impacts of heat supply interruptions.

Purpose of the Study:

• To develop a novel reliability evaluation method for PIES that incorporates transient dynamics and human health considerations.
• To address the limitations of current methods by including the impacts of extreme scenarios like heat supply interruptions.

Main Methods:

• Utilized quasi-steady-state simulation to model the dynamic behaviors of electricity, gas, heating systems, and buildings.
• Developed simplified quasi-steady-state models for energy demand and indoor temperature evolution under extreme conditions.
• Formulated a new reliability index considering district heating network thermal inertia and occupant temperature tolerance.

Main Results:

• The proposed method enhances the accuracy and interpretability of PIES reliability evaluations.
• Successfully bridged the gap in assessing user health impacts during extreme events.
• Confirmed that building thermal dynamics significantly influence the overall reliability of PIES.

Conclusions:

• The quasi-steady-state simulation method provides a comprehensive framework for PIES reliability assessment.
• Incorporating occupant health and building thermal inertia leads to more realistic reliability evaluations.
• Building thermal characteristics are a critical factor in ensuring PIES reliability, especially under adverse conditions.