Modelling Steady State and Transient Stability Parameters for Kainji Hydropower Station, Nigeria

The study explores the creation of a simulator for addressing the problem of predicting response of Nigeria’s Kainji’s Hydro Power Plant (KHPP) to system load variations and to determine parameters for stable operation. A virtual KHPP Simulation Model was designed and created using MatLab/Simulink s...

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Bibliographic Details
Published inAdvanced engineering forum Vol. 52; pp. 117 - 128
Main Authors Adu, Michael Rotimi, Melodi, Adegoke Oladipo, Onimisi, John O.
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 25.07.2024
Subjects
Clearing
Electric potential
Excitation
Hydraulic turbines
Hydroelectric plants
Hydroelectric power stations
Load fluctuation
Parameters
Rotor speed
Short circuits
Simulation models
Stators
Steady state
Synchronous machines
Transient stability
Voltage
Nigeria
Synchronous Generator
Transient Stability
Excitation System
Steady State Stability
Hydraulic Turbine Governor
Hydro Power Plant
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ISSN2234-9898
2234-991X
2234-991X
DOI10.4028/p-p7snNz

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Summary:The study explores the creation of a simulator for addressing the problem of predicting response of Nigeria’s Kainji’s Hydro Power Plant (KHPP) to system load variations and to determine parameters for stable operation. A virtual KHPP Simulation Model was designed and created using MatLab/Simulink software. The components of the HSS designed and incorporated in the virtual simulator include models of all eight (8) generating units (GUs). Each GU model consists of the Hydraulic Turbine Governor (PID), synchronous generator and an excitation system. The simulator was tested with steady state stability (SSS) and transient stability (TS) disturbances to obtain response values of system operating state parameters. The tests include a variable load increase, and three-phase short circuit fault for a duration of 0.2 s. The SSS limits established are the following: active load – 810 MW, load angle – 850, terminal voltage 0.68 pu, rotor speed 1.08 pu, excitation voltage 1.55 pu, and stator current 7.5 pu. TS limits established are load angle (1700), terminal voltage (0.60 pu), rotor speed (1.05) pu, excitation voltage (1.25 pu), stator current (7.1 pu), and critical clearing time (0.2s). Clearing time should be set at 0.2s to prevent KHPP and connected system’s instability.
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ISSN:2234-9898
2234-991X
2234-991X
DOI:10.4028/p-p7snNz