A study on the effect of the stability of the electric power system on the internal and external contingency of the combined energy hub

Abstract

In this study, the combined energy hub on the gas pressure converter station in South Korea was configured in a detailed model form rather than a conventional model form. In addition to power sources such as fuel cells and TEG, energy storage systems (ESS), photovoltaics (PV), combined heat and power systems (CHP), and transformers and buses are configured, and loads are configured to observe various problems that can occur in each change. And the contingencies that can occur inside and outside the combined energy hub are simulated for the Turbo Expander Generator (TEG) to operate effectively in connection with the power system.Four fault locations of connected load and power generation facilities inside the combined energy hub are selected, and we observe the voltage change of each bus as the circuit breaker operates. In addition, as an external change, the increase in renewable energy and the voltage change due to transmission line contingencies were also observed. The analysis intends to establish a system analysis environment to check whether a problem occurs in terms of voltage and reactive power during the operation of future combined energy hubs.

Keywords

• Combined energy hub
• Electrical power system
• Energy storage system
• Fuel cell
• Internal and external contingencies
• Turbo expander generator