The impact of variation in water flow rate and temperature on reliability analysis of run of the river power plants

A run-of-the-river power plant is a renewable energy source used for electricity production. Its power output depends on the varying water flow rate over time, which can impact the reliability of the electric network. Previous research has not studied the effects of water flow rate and temperature variations on the hazard rate of the plant's components. This paper addresses this gap by investigating the impact of these variations on the reliability of electric networks with run-of-the-river power plants. The analysis considers the hazard rates of the plant's components, incorporating the relationship between hazard rate and temperature based on the Arrhenius law. Parameters such as power output, current, power loss, operating temperature, and hazard rate are calculated for different water flow rates and ambient temperatures. Numerical simulations on a test system are conducted to examine the influence of water flow rate and temperature on the reliability indices of the electric network. The results demonstrate that water flow rate and temperature significantly affect the hazard rates of run-of-the-river power plants. This highlights the need to consider these factors in the reliability analysis of electric networks incorporating these renewable resources. To address the impact of variation of water flow rate and temperature on reliability indices of electric networks including run-of-the-river power plants, reliability analysis of these units considering variable hazard rate of assembled elements is examined here. image