Variable-speed constant-frequency wind turbine generator inertia energy support control method and device

Abstract

The invention discloses an inertia energy control method, device and equipment for a variable-speed constant-frequency wind turbine generator and a computer readable storage medium. The method comprises steps that a Cp-lambda scatter distribution array is obtained according to operation data of the wind turbine generator; a Cp-lambda curve of the unit in the inertial energy supporting process is obtained; delta Eaero is obtained according to the Cp-lambda curve and the aerodynamic power of the unit in the inertial energy supporting process; delta Ee and delta Eloss of the unit in the inertia energy supporting process are calculated, delta Ekic is obtained according to the rotating speed constraint, and the supporting time of the unit in the inertia energy supporting process is obtained according to the formula delta Eaero-delta Ee-delta Eloss-delta Ekic=0; when the power support time of the unit reaches the support time, the unit is controlled for quitting the inertial energy support process. The method is advantaged in that the supporting time of the unit in the inertia energy supporting process is calculated according to the actual operation condition of the unit, and the unit iscontrolled according to the supporting time, so the unit can play a maximum supporting role, the good power grid supporting effect is achieved, and accidental shutdown of the unit is prevented.

Description

technical field [0001] The present application relates to the technical field of wind turbine control, and more specifically, to a variable-speed constant-frequency wind turbine inertial energy support control method, device, equipment, and computer-readable storage medium. Background technique [0002] The mechanical power of the variable speed constant frequency wind turbine is decoupled from the electromagnetic power, and the rotor speed is decoupled from the grid frequency. Therefore, when the grid frequency fluctuates, it cannot show the inertia characteristics similar to the synchronous generator. Therefore, when the proportion of wind power in the system increases When the power grid is large and the power grid is weak, the total inertia and frequency regulation capability of the entire system will be relatively reduced. In order to better ensure the safe and stable operation of the system after wind power is connected to the grid, many countries have made clear requi...

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Problems solved by technology

However, at present, when using this control method for control, it is impossible to know the amount of inertial energy that the variable speed constant frequency wind turbine can support, and it is not known when the variable speed constant frequency wind turbine should exit the process of inertial energy support. If it is too early, the variable speed constant frequency wind turbine will not be able to exert the best support performance, and it will not be able to obtain the best grid support effect. If it is withdrawn too late, it will cause the variable speed constant frequency wind turbine to stop unexpectedly

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