Inertial energy support control method and device for variable-speed constant-frequency wind turbines
A wind turbine, variable speed constant frequency technology, applied in wind turbine combination, wind power generation, wind turbine and other directions, can solve the problem that the grid support effect cannot be obtained, the variable speed constant frequency wind turbine cannot exert the support performance, and the variable speed constant frequency wind turbine cannot be known. Inertia energy, etc.
Active Publication Date: 2021-11-09
ZHEJIANG WINDEY +1
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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 If it is withdrawn too late, it will cause the variable speed constant frequency wind turbine to stop unexpectedly
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[0052] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0053] see Figure 1 to Figure 5 ,in, figure 1 It shows a flow chart of a variable-speed constant-frequency wind turbine inertial energy control method provided by the embodiment of the present application, figure 2 A schematic diagram of the working process of the inertial energy support process of the variable-speed constant-frequency wind turbine provided by the embodiment of the present application is shown, image 3 A schematic diagram showing the selection of the inertial e...
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The present application discloses a variable-speed constant-frequency wind turbine inertial energy control method, device, equipment and computer-readable storage medium. The method includes: obtaining C according to the operating data of the unit p ‑λ scattered point distribution array; get the C of the unit in the process of inertial energy support p ‑λ curve; according to C p ‑λ curve and the aerodynamic power of the unit in the process of inertial energy support get ΔE aero ; ΔE of the computer group in the process of inertial energy support e and ΔE loss , and get ΔE according to the speed constraint kic , and according to ΔE aero ‑ΔE e ‑ΔE loss ‑ΔE kic =0 to obtain the support time of the unit in the inertial energy support process; when the power support time of the unit reaches the support time, the control unit exits the inertial energy support process. The above-mentioned technical solution disclosed in this application calculates the support time of the unit in the process of inertial energy support according to the actual operation of the unit, and controls the unit according to the support time so that the unit can exert the maximum support effect, thereby To achieve a better grid support effect, and to prevent unexpected shutdown of the unit.
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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IPC IPC(8): H02J3/24H02J3/38H02J3/46F03D9/25
CPCF03D9/25H02J3/24H02J3/46Y02E10/72Y02E10/76
Inventor 许国东迟永宁余清清杨靖李琰叶积炜
Owner ZHEJIANG WINDEY