A time-sharing multi-frequency control method for power grids to improve new energy consumption

Abstract

The invention discloses a time-division multi-frequency control method for improving new energy absorption of a power grid, and relates to the field of power system running control and new energy absorption. The time-division multi-frequency control method comprises the steps of constructing a time-division multi-frequency robustness control model of the power grid; taking a dispatching expectation relation between uncertainty absorption quantity demand and load frequency response as a state equation; adding a feedback weighting equation into a feedback step of the robustness control module; and finally, building a solution equation of the time-division multi-frequency robustness control model of the power grid, and achieving optimal proveness and solution of the model. By implementing the optimal solution of the time-division multi-frequency robustness control model of the power grid, the uncertainty fluctuation of virtual frequency following with new energy can be achieved, the expectation relation in the state equation is met, the obtained virtual frequency control quantity is in equivalent response to a corresponding frequency modulation unit during actual running, and the expected absorption of the power grid on new energy power generation quantity is finally achieved.

Description

Technical field [0001] The invention relates to the fields of power system operation control and new energy consumption, in particular to a power grid time-sharing multi-frequency control method for improving new energy consumption. In order to improve the new energy consumption capacity of the power system during low load periods. Background technique [0002] With the continuous development of new energy power generation technology, grids with a high proportion of new energy have become an inevitable trend in the development of the future power system structure. At the same time, due to the characteristics of randomness, volatility, and anti-peak regulation of new energy power generation, improving the consumption capacity of the grid side is an effective measure for the stable operation and sustainable development of new energy power generation. At present, in the field of scientific research at home and abroad, the development of new energy consumption technology mainly...

AI Technical Summary

Problems solved by technology

However, due to the intermittence and uncertainty of new energy output and the lack of rationality of the existing power grid operation scheduling method, serious abandonment of new energy is caused.

[0003] In the current analysis and research on the improvement of the consumption capacity of the new energy grid, the main focus is on the adequacy of the power system, including reasonable optimization of unit backup, margin peak regulation of energy storage units, pumped storage and deep peak regulation of thermal power units etc. However, in terms of system stability, it is analyzed independently of adequacy. In terms of adequacy and safety stability, there is no scientific and reasonable intermediate variable for model solving and derivation. The present invention proposes a virtual frequency variable, considering the change of the virtual frequency variable The capacity of the power grid to absorb wind power, solve and calculate the response mode of the time-sharing control virtual frequency, and use this response control mode to guide the reasonable action of the frequency modulation unit in the grid

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