| Title |
A Study on the Replacement of Self-starting Generators using Turbo Expander Generator |
| Authors |
이종훈(Jonghoon Lee) ; 김성렬(Sungryeol Kim) ; 손다빈(Dabin Son) ; 한상욱(Sangwook Han) |
| DOI |
https://doi.org/10.5370/KIEEP.2022.71.4.281 |
| Keywords |
gas pressure; induction generator; reactive power; self-starting generator; turbo expander generator |
| Abstract |
In supplying natural gas to the city, Korea Gas Corporation manufactures a TEG generator using the energy that lowers the gas pressure, and conducts research to demonstrate the application. Since TEG is a facility that generates electricity using only natural gas pressure, it is characterized by being able to generate electricity without any other special energy source. This is similar to a hydroelectric generator and can be used as a self-starting generator that is first started to recover when a power outage occurs throughout the power system. In this paper, since the location where TEG generators are currently being demonstrated corresponds to southern Gyeongin in terms of the procedure for restoring the system in the event of a power outage, we propose a plan to replace self-starting generators in southern Gyeongin with TEGs and restore the power system. Replacing the self-starting generator with TEG, confirming through simulation whether the priority starting generator can operate through the transmission line, and reflecting the characteristics of the TEG generator consisting of an induction generator, the amount of reactive power required to pressurize the transmission line and the power required to supply the priority start generator was analyzed. It was confirmed that the TEG generator can produce the same output as the self-starting generator by using the charging current charged from the trial transmission line and the additional parallel capacitor. In the future, TEG will be used not only as a self-starting generator, but also as a generator that can provide inertia to contribute to the stabilization of the power system. |