Online grouping method for direct-driven fans
A fan and direct drive technology, applied in computer parts, instruments, calculations, etc., can solve the problems of not considering the ability of the unit to output active power, and it is difficult to reflect the difference of the operating state of the unit.
Pending Publication Date: 2022-07-29
ELECTRIC POWER RES INST STATE GRID JIBEI ELECTRIC POWER COMPANY +3
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However, it is difficult for the above two methods to perform an online equivalent for a direct-drive wind turbine with a slope recovery control strategy.
The characteristics of the direct-drive wind turbine during the recovery period are not only related to the wind speed, but also related to the degree of voltage drop at the machine terminal. It is difficult to reflect the difference in the operating status of the wind turbine unit during the recovery period of the active power ramp by only using the wind speed as the grouping index.
Taking wind speed as the grouping index, based on the response characteristics of direct-drive wind turbines, an equivalent modeling method is proposed for the two control modes of active power instantaneous recovery and slope recovery, but the ability of the unit to output active power during low voltage ride-through is not considered
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[0046]In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.
[0047] Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skil...
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The embodiment of the invention provides an online grouping method for direct-driven fans, and relates to the technical field of wind power generation. The direct-driven fan online grouping method comprises the following steps: step 1, calculating critical power of an active transient response demarcation point of each wind turbine generator under the condition that a wind power plant network side has a fault to cause voltage drop of a wind turbine generator end; 2, performing simulation test and fitting on the relationship between the input wind speed of the direct-driven wind turbine generator and the output power of the generator end; and 3, according to the fitting relationship and the critical power, inversely calculating the critical wind speed of each wind turbine generator, and judging the category of the active response characteristics of the wind turbine generator according to the actual operation wind speed. According to the method, the dynamic response characteristics of each wind turbine generator can be quickly grouped, the method is suitable for online analysis, and a quick grouping method is provided for online equivalent modeling of a wind power plant in the future.
Description
technical field [0001] The invention relates to the technical field of wind power generation, in particular to an online grouping method for direct-drive fans. Background technique [0002] With its advantages of safety, cleanliness, high efficiency and low cost, wind energy has been widely used in power systems. However, due to the strong randomness and volatility of wind energy, the large-scale integration of wind power into the grid will affect the safe and stable operation of the power system. In order to maintain the power supply reliability of the power system, it is necessary to simulate and analyze the power system with large-scale wind power access. However, if each wind turbine is modeled in detail, the computational complexity will be greatly increased, the simulation efficiency will be reduced, and even the problem of "dimension disaster" will occur. Therefore, dynamic equivalent modeling of wind farms is of great significance for analyzing the stability of pow...
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IPC IPC(8): H02J3/48H02J3/38G06K9/62
CPCH02J3/48H02J3/381H02J2203/20H02J2203/10G06F18/241
Inventor 李东晟吴林林徐曼刘海涛杨艳晨邢晶王潇孙舶皓
Owner ELECTRIC POWER RES INST STATE GRID JIBEI ELECTRIC POWER COMPANY