Under-frequency load-shedding scheme setting method considering wind power integration
A technology of low-frequency load shedding and wind power, which is applied in wind power generation, electrical components, circuit devices, etc., and can solve problems such as the adaptability of low-frequency load shedding schemes to be discussed and the frequency characteristics of the power grid.
Inactive Publication Date: 2019-09-20
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
[0004] The traditional low-frequency load shedding scheme does not take into account the characteristics and impact of wind power. With the high-penetration wind power connected to the grid, the frequency characteristics of the grid become more complex, and the adaptability of the original low-frequency load shedding scheme needs to be discussed. The low-frequency load shedding scheme setting for wind power access has become an urgent problem to be solved
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[0058] The above part has explained the technical core and main implementation steps of the present invention. In order to understand the technical means of the present invention more clearly, the present invention will be further described in detail in conjunction with the accompanying drawings and specific implementation methods.
[0059] The present invention proposes a low-frequency load shedding scheme setting method considering wind power access. On the basis of traditional low-frequency load shedding schemes, taking into account the impact of wind power access on the implementation effect of low-frequency load shedding, by dynamically implementing unbalanced power Calculation, to solve the problem of wind power output fluctuations and equivalent inertial time constants that are difficult to analyze and calculate; consider the load characteristics to build a site selection and capacity model for load shedding to improve the effect of frequency recovery after load shedding,...
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The invention provides an under-frequency load-shedding scheme setting method considering wind power integration. On the basis of a traditional under-frequency load-shedding scheme, the influence of the wind power integration on the under-frequency load-shedding implementation effect is considered, so that an under-frequency load-shedding scheme after the wind power integration is obtained. According to a model, dynamic calculation is carried out on unbalanced power, so that the problems of fluctuation influence of wind power output, equivalent inertia time constant and the like are solved; and load frequency characteristics are included to build a locating and sizing model of load shedding, so that the adaptability of the under-frequency load-shedding scheme is improved to a certain extent.
Description
technical field [0001] The invention relates to a method for setting a low-frequency load shedding scheme considering wind power access, which belongs to the emergency control measures of the third line of defense in system stability control. Background technique [0002] According to the data released by the National Energy Administration, in 2017, the new grid-connected wind power installed capacity was 15.03 million kilowatts, and the cumulative grid-connected installed capacity reached 164 million kilowatts, accounting for 9.2% of the total power generation installed capacity. With the development of new energy sources, conventional units are gradually being replaced, and the penetration rate of wind power in the grid continues to increase. The safe and stable operation of the power system is facing a series of new challenges. [0003] Wind power has the characteristics of randomness, volatility, and low predictability; insufficient fault ride-through capability can easi...
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IPC IPC(8): H02J3/38H02J3/46
CPCH02J3/386H02J3/46H02J2203/20Y02E10/76
Inventor 王士元任建文
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)