Abstract
With the significant decrease in natural gas prices in many parts of the world, the employment of gas turbine (GT) units has increased steadily in recent years. The ever-increasing deployment of GT units is strengthening the interconnections between electric power and natural gas systems, which could provide a higher level of operational flexibility and reliability. As a result, the planning and operation issues in the interconnected electric power and natural gas systems have aroused concern. In these circumstances, the impacts of increasing deployment of GT units in power system operation are studied and evaluated through well-being analysis (WBA). The fast responsive characteristics of GT units are analyzed first, and the definition and adaption of WBA in a power system with increasing deployment of GT units are addressed. Then the equivalent reserve capacity of GT units is estimated, taking demand fluctuations, commitment plans, and operational risks of GT units into account. The WBA of a power system with increasing deployment of GT units is conducted considering the uncertainties of system operation states and renewable energy sources. Finally, the proposed methods are validated through an integrated version of the IEEE 118-bus power system and a 10-bus natural gas system, and the impacts of GT units on power system security under various penetration levels are examined. Simulation results demonstrate that the role of a GT unit as a low-cost electricity producer may conflict with its role as a reserve provider, but through maintaining a proper proportion of idle GT capacities for reserve, the well-being performance of the power system concerned can be significantly improved.
Highlights
The coupling of power systems and other energy systems is becoming more common, along with the development of various renewable energy sources and energy conversion devices
The well-being analysis (WBA) in a power system with conventional generators, Gas turbine (GT) units and variable renewable energy sources (VRES) units is conducted by comparing all possible combinations of the unit commitment and outage/fluctuation events
The fact that GT units are employed as low-cost generating units keeps them from being competent competent reserve providers
Summary
The coupling of power systems and other energy systems is becoming more common, along with the development of various renewable energy sources and energy conversion devices. The impacts of increasing GT capacity and the interactions between the natural gas and electric power systems on the secure operation of the concerned power system have not yet been given much attention. The increasing deployment of GT units and newly emerged power-to-gas (P2G) infrastructures has strengthened the interconnections between the electric power and natural gas systems more than ever before, which means the natural gas network will be under significant pressure when both GT’s natural gas demands and direct natural gas consumption are high [5], and supply limitations and element failures may have significant impacts on the security of the integrated energy system. It is necessary to analyze the impacts of the ever-increasing deployment of GT units on the secure operation of energy systems.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
