Power control method of tidal current generator set with economic benefit maximization
A technology with economic benefits and control methods, applied in the direction of machines/engines, mechanical equipment, ocean energy power generation, etc., can solve problems such as large shocks, frequent failures, increase unit maintenance costs, etc., to achieve the best economic benefits.
Active Publication Date: 2019-05-28
ZHEJIANG UNIV
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Problems solved by technology
However, the flow rate of the tidal current changes with time during the tidal period, which leads to the inevitable change of the power generation of the tidal current energy unit.
This requires the tidal current energy generator unit to withstand a certain range of power generation changes, but if the power generation range is too large, it will inevitably lead to an increase in overall hardware costs and reduce the economic benefits of power generation
Since the density of seawater is higher than that of air, the impact on the tidal energy generator unit will be much greater than that of the wind turbine unit; at the same time, due to the large amount of sediment in my country's offshore tidal energy-rich sea areas, this will cause the use of variable pitch control Frequent failures of tidal current energy generator sets greatly increase the maintenance cost of the unit
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[0017] The present invention will be further described below in conjunction with drawings and embodiments.
[0018] Such as figure 1 Shown, the step of the inventive method is as follows:
[0019] Step 1) Use the maximum power control algorithm to control its power output before the generating power of the tidal current energy unit is close to the rated power, so as to maximize the utilization of tidal current energy;
[0020] Step 2) When the power is close to the set power, the tidal current energy generator set deviates from the maximum power output curve through torque stall control, so as to reduce the rising speed of the power generation of the tidal current energy generator set as the tidal current flow rate increases;
[0021] Step 3) Stall completely when the rated power is reached or exceeds the rated power within the allowable range, so that the power generated by the tidal current energy generator unit is kept within the tolerance range of the tidal current energy...
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The invention discloses a power control method of a tidal current generator set with economic benefit maximization. The method comprises the following steps of controlling the power output of the tidal current generator set with a maximum power control algorithm before the generation power of the tidal current generator set approaches to the rated power, so that the tidal current energy is utilized maximally; enabling the tidal current generator set to deviate from the maximum power output curve through torque stall control when the generation approaches to the set power, and accordingly reducing the velocity that the generation power of the tidal current generator set is increased as the tidal current velocity is increased; completely stalling when the generation power reaches the rated powder or exceeds the rated powder within the permissible range, and keeping the generation powder of the tidal current generator set within the tolerance range of the tidal current generator set; andactively controlling shutdown through a torque when the tidal current velocity reaches the warning velocity. Through application of the control method, the output power can be controlled within a certain range, and the requirements for electrical equipment and other devices are reduced, so that the economic benefits are maximized.
Description
technical field [0001] The invention relates to a control method for a tidal current energy generator unit, in particular to a power control method for a tidal current energy generator unit that maximizes economic benefits. Background technique [0002] Tidal current energy is a kind of ocean energy that has attracted more and more attention in recent years. Tidal current energy is very abundant on the coast, straits, and waterways between islands, etc., and has high utilization value. Various types of tidal current energy generator units are also gradually being developed and constructed. However, the flow rate of the tidal current changes with time during the tidal period, which leads to the inevitable change of the power generation of the tidal current energy generator unit. This requires the tidal current energy generator unit to withstand a certain range of power generation changes, but if the power generation range is too large, it will inevitably increase the cost of...
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Login to View More IPC IPC(8): F03B15/00F03B13/26
CPCY02E10/30
Inventor 张大海刘浩司玉林钱鹏
Owner ZHEJIANG UNIV