Tidal power generation methods are generally classified according to different station construction methods and different operating directions. They are generally divided into three categories, namely: Single-bank unidirectional tidal power generation - when the tide rises, tidal power generation is generally classified according to different station construction methods and different operating directions. the lock is opened to allow the tide to flow into the bay reservoir, causing the water level in the reservoir to rise with the tide. When the highest tide level is reached, the gate is immediately closed to separate the reservoir water from the sea and prevent the bay reservoir water from returning to the sea with the ebb. When the tide falls to a certain level, the water level in the bay reservoir will be higher than thewater level in the sea. Conditions are right for water to flow downward and it has the power to do work. At this time, the reservoir door is opened again, allowing water from the reservoir to push the turbine blades, drive the generator to produce electricity, and then return to the sea. < /p>
This is the oldest form of tidal power generation, and is how the world's first tidal power station operated. For a sea that rises and falls twice a day, this type of power plant can operate twice a day and produce electricity for 10 to 12 hours.
Another single-reservoir bidirectional tidal power generation: two gates are built on both sides of the dam, and the turbine is located in the middle of the four gates. When the tide rises, both gates 1 and 4 are open and both gates 2 and 3 are closed. Sea water hitsthe turbine blades, driving the generator to produce electricity, and the seawater flows into the tank; the tide falls, both gates 2 and 3 are open, and both gates 1 and 3 are open. 4Both gates are closed and seawater generates electricity as it flows through the turbines into the sea. At low tide, all four gates are closed and no electricity is generated.
Such a power plant can produce electricity twice during an ebb and flow of the ocean tide, and it uses a reservoir, so it is called a single-reservoir bidirectional type. It can produce electricity for 10 to 20 hours a day, and its efficiency is significantly better than that of a single-bank unidirectional tidal power plant.
There is also double-reservoir tidal power generation, which requires the construction of two reservoirs, a high reservoir and a b reservoiras. The water level in the high tank always remains at a high level, while the water level in the low tank is always lower than the water level in the high tank. The turbogenerator operates in one direction. There is an inlet door built on the high tank and a discharge door built on the low tank. When the tide rises, the water inlet gate opens and the power plant begins to operate. The water level in the high reservoir rises with the tide level, and the water level in the low reservoir also rises because the water that produced electricity enters. . When the high tide decreases, the water inlet gate is closed and the water level in the high reservoir begins to fall due to continuous electricity generation, and the water level in the low reservoir increases Consequently. opened, causing the water level in the low tank to drop. Due to the large gap between the upper and lower tanks, thes conditions for electricity production were created and the power plant is still operating. When the water level of the high tank drops to a certain distance from the tide level, the discharge gate is closed and the water inlet gate of the high tank is opened. By repeating this cycle, the tank always maintains a certain height and the power plant can produce electricity continuously 24 hours a day.
However, the location of this type of power plant has requirements of higher ground, it is therefore generally used less.
There is a relationship between electricity production and the storage capacity of the reservoir.
The storage capacity of the reservoir determines how much water the reservoir can store, and the power generation capacity of the reservoir depends on many factors, including the flow capacity of the reservoir. tank jet, the extent of changes inwater level and production capacity of the tank. The installed capacity of the power unit, the water level of the tank, etc.
When the reservoir has a larger storage capacity, it can store more water, so that more water can be released to generate electricity when the water level is high , thus increasing the amount of electricity produced. The power generation capacity of the reservoir is also limited by the range of variation of the water level of the reservoir and the installed capacity of the production unit. When the water level variation range is small or the installed capacity of the production unit is low, even if the storage capacity of the reservoir is large, the electricity production capacity remains limited.