BUILDING AN ANALYTICAL MODEL OF LINE STABILITY DUYEN HAI 1 THERMAL POWER FACTORY CONNECTED TO THE 220 KV GRID IN THE MEKONG RIVER DELTA, VIETNAM

The stability assessment of the power system is one of the most important tasks in the design and operation of the power system. Stability is the ability of the system to recover to the initial state or close to the initial state after large disturbances to the initial state Duyen Hai 1 Thermal Power Plant belonging to Duyen Hai Power Center, consisting of two generating units, totaling two units, with a capacity of 1,245 MW, the output of electricity produced is about 7.8 billion kWh per year. The participation of Duyen Hai 1 Thermal Power Plant in the system has specific impacts on the stability of the system. Incidents that destabilize Duyen Hai 1 Thermal Power Plant can cause widespread power outages, leading to great economic losses. Therefore, the research team analyzes and evaluates the stability of Duyen Hai 1 Thermal Power Plant by using the standard theories of stability regarding rotor deflection angle, critical shear time, transient curves of mechanical quantities and power when agitation occurs, comparing the critical mode with the operating mode to conclude the possibility of stability.