It cannot operate at full capacity throughout the year, and the warranty rate is 80%. , generally only allows normal operation for about 180 days; during dry periods, electricity production drops sharply, by less than 50%, and sometimes no electricity is even produced. That is, it is limited by the natural flow of the river and there is a large amount of water abandoned during the rainy season.
Hydroelectric plants that basically do not regulate runoff and produce electricity based on the incoming water flow. When the incoming water flow is greater than the water passage capacity of the power plant's turbine, the hydroelectric power plant operates at full power. Excess water does not produce electricity through the unit and is directly discharged downstream through the drainage channel, called abandoned. When the incoming water is less, all the waterIncoming water passes through the unit, but part of the installed capacity remains unused due to lack of water. This way of operating a hydroelectric plant is called runoff power generation. The run-of-river hydroelectric plant corresponds to the regulating hydroelectric plant, which operates using a reservoir to regulate runoff and produce electricity according to energy needs: when the incoming water is greater than needed, the reservoir stores water when it is available; lack of water, the tank replenishes water. Regulating hydroelectric plants include multi-year regulation, annual (seasonal) regulation, weekly regulation, daily regulation and other hydroelectric plants (see runoff regulation). Among them, daily regulated hydropower plants generally only carry out daily regulation during the season.its dry and often use runoff energy production during flood season. Therefore, some people think that daily-regulated hydropower plants are also daily-regulated hydropower plants. There are diversion type hydroelectric plants with high or low water levels, and dam type hydroelectric plants with low water levels.