Reliability Assessment of the Integrated Energy System Considering Gas–Thermal Inertia

Abstract

The electrical–thermal coupling integrated energy system (IES) has multi-timescale characteristics, and the gas–thermal slow dynamic characteristics of the IES contain rich flexibilities. The state of the gas–thermal system changes relatively with a time delay when the external conditions change, which can provide power support for the system over a certain timescale. Based on the gas–thermal inertia power support capability, a reliability assessment method of the IES considering gas–thermal inertia is proposed. According to research, the reliability assessment of the IES based on gas–thermal inertia can reduce the size and frequency of load shedding, alleviate the system operation risk caused by heavy load, reduce the system operation cost, and improve the system long-term operation reliability and economy. The greater the importance assessment index of energy conversion equipment, the greater its impact on system reliability, which is the weak node that should be focused on and protected.

Integrated energy system operation considering building thermal inertia and hydrogen storage systems

“…where w is the inertia weight; c 1 and c 2 are the acceleration coefficients, respectively. The individual positions are updated by eqn (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21).…”

“…Wang et al 18 proposed an integrated energy system operation optimization method considering the thermal inertia of the heating system and demonstrated that the coordinated optimization of thermal system thermal inertia and energy storage characteristics is beneficial to reduce the strong electrical and thermal coupling of CHPs, which can effectively improve the wind absorption capacity of the system and increase the flexibility of IESs. Zhu et al 19 proposed a reliability assessment method for international energy systems considering aerothermal inertia based on the power support capability of aerothermal inertia and verified that the assessment method can reduce the scale and frequency of power outages due to the prevention of power plant overload operation, mitigate the system operation risk caused by load overload, reduce the system operation cost, and improve the long-term operation reliability and economy of the system. Qu et al 20 proposed a new IES optimization model considering thermal inertia and natural gas inertia for the multivariate heterogeneity of energy sources in thermal and natural gas systems and verified that the model can effectively reduce the system operation cost and improve the system economy by constructing an arithmetic example.…”

Reliability Optimization Method for Gas–Electric Integrated Energy Systems Considering Cyber–Physical Interactions

“…Reliability assessment is an essential component within integrated energy systems, providing a comprehensive analysis and evaluation of the current level of reliability for GEIES [5]. Reference [6] explored the importance of gas-thermal inertia in electricalthermal-coupling integrated energy systems and proposed a reliability assessment method considering gas-thermal inertia, which can improve the operational reliability and economy of the system. In reference [7], the reliability analysis of integrated energy systems was studied, and an approach was proposed for capacity outage states' modeling of multi-energy associations in integrated energy systems.…”