Coordinated Operation and Planning of Integrated Electricity and Gas Community Energy System With Enhanced Operational Resilience

Abstract

The coupling in integrated electricity and gas community energy system (IEGS) provides alternative operation modes when unpredictable outages occur at energy-supply sides. Reasonable operation strategies and system configuration can effectively improve the system's resilience, making reliable and continuous operation feasible. Based on the complementary characteristics and reserve capabilities of IEGS, this paper proposes a multi-stage scheduling strategy for resilience enhancement in which thermal storage serves as emergency response resources. The resilient scheduling framework consists of rolling reserve optimization stage, day-ahead economic dispatch stage and fault restoration stage. With the reserve capacity of energy storage generated by rolling optimization and day-ahead dispatch, multiple forms' critical loads will be satisfied in priority when outage occurs on energy-supply sides. Furthermore, a two-level planning model integrating the resilient operation strategy is formulated to better adapt to the source emergency. The proposed planning method is applied to an IEGS with practical demands as a case study. The results show that the configuration generated by the two-level planning model can satisfy the daily reserve requirements for emergency failures, and the resilient scheduling strategy with storage reserve can improve the system resilience effectively. INDEX TERMS Integrated electricity and gas community energy system (IEGS), planning, operational resilience, energy storage, energy outage. NOMENCLATURE A. ABBREVIATIONS

Decentralized Bilateral Risk-based Self-healing Strategy for Power Distribution Network with Potentials from Central Energy Stations

“…T HE energy dilemma and environmental pollution issues have expedited the revolution of energy utilization [1], [2]. Electricity-gas energy system (EGES), in which energies are distributed by power distribution network (PDN) and natural gas system and end-consumers are fed by central energy stations (CESs), has been widely spread to achieve high-efficiency and low-carbon operation [3]. Due to the existence of flexible resources in energy coupling, storage and consumption links, CESs have become the key points for multi-energy coordination and systematic facilitation [4].…”

“…The DistFlow branch model with considering flexible to-pology is adopted to describe the PDN. Equations ( 1) and ( 2) denote the active and reactive power balances of node j at time t. And the branch current magnitude can be obtained by (3). Besides, the active and reactive power injections of node j at time t are described in ( 4) and ( 5).…”

Resilience-constrained expansion planning of integrated power–gas–heat distribution networks

“…𝑉 𝑖 ≤ 𝑉 𝑖,𝑡 ≤ 𝑉 𝑖 (26) 𝜃 𝑖 ≤ 𝜃 𝑖,𝑡 ≤ 𝜃 𝑖 (27) 0 ≤ 𝑃 𝑐𝑢𝑟𝑡 𝐸,𝑖,𝑡 ≤ 𝑃 𝐷,𝑁𝑐𝑟 𝐸,𝑖,𝑡 (28) In distribution lines, power flow is limited by the maximum thermal capacity of the conductors. This constraint can be modeled with the maximum apparent power of the line.…”

“…In [2], a tri-level optimization-based decision support tool is proposed to enhance the resilience of a coupled PDN-urban transportation system in HR events. A two-level planning model for integrated power and gas networks considering a resilient scheduling strategy is studied in [27] to improve the adaptation to the resilience requirements in actual operation. A two-level planning approach for integrated electricity and gas energy systems is proposed in [28] that considers a short-term resilience scheduling strategy to determine the optimal configuration along with the operation.…”

Optimal Hybrid Energy Storage System Planning of Community Multi-Energy System Based on Two-Stage Stochastic Programming

“…Owing to the inherent intermittent, fluctuation, and randomness of renewable energy sources (RES), it is still a hard problem to promote the local consumption of RES [3,4]. As a novel form of the energy system, the multi-energy system (MES) couples multi kinds of energy flow, such as electricity, natural gas, and heat, which not only meets the different energy demands of users but also has considerable operational flexibility because of the energy complementary [5,6]. Hence, the MES is believed to an excellent choice to promote the local consumption of RES and improve energy efficiency [7,8].…”