Power generation system, power control system and method for parallel operation of multiple wind turbines

Abstract

The invention discloses a power generation system, a power control system and a method for parallel operation of multiple wind turbines, and belongs to the field of wind turbines. The multiple wind turbines include M wind turbines connected to the same variable-frequency AC busbar, and further include: The machine-side converter connected with the frequency conversion AC busbar; the real-time wind speed acquisition module, used to collect the real-time wind speed of M wind turbines; the maximum wind energy output controller, connected with the real-time wind speed acquisition module, used to calculate the energy obtained according to the real-time wind speed The same speed of the wind turbine fleet with the best wind energy output ω opt ; Machine-side controller, used for the optimal same speed ω opt Control the machine-side converter to realize the variable speed power generation of M wind turbines; the pitch controller is used to output the pitch angle control value of each wind turbine so that the power generated by each wind turbine does not exceed the rated power value. The invention can reduce the wind energy loss during the parallel operation of the wind turbines, and prevent the output power of each wind generator set from exceeding the rated value.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a power generation system, a power control system and a method for parallel operation of multiple wind turbines. Background technique [0002] Offshore wind power has the advantages of high wind speed, low turbulence intensity, and stable wind speed and direction, and is the main trend of the development of the wind power industry. If multiple wind turbines are operated in parallel instead of single-machine discrete control, it will help reduce the failure rate, thereby reducing offshore maintenance work, increasing effective power generation time, and reducing the total system cost. However, when there is a difference in wind speed at the wind turbines connected to the same variable frequency AC bus, this will result in a certain loss of wind energy. For wind turbines with too high wind speed, the output power will easily exceed the rated value. How to calculate in real time...

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Problems solved by technology

However, when there is a difference in wind speed at the wind turbines connected to the same variable frequency AC bus, this will result in a certain loss of wind energy. For wind turbines with too high wind speed, the output power will easily exceed the rated value. How to calculate in real time and quickly according to the change of wind speed The operating speed of the wind turbines, reducing the wind energy loss during the system control process, and effectively controlling the output power of each wind turbine to not exceed the rated value in real time are problems that need to be further resolved.

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