Design method of automatic generation control model under intermittent energy grid-connection

Abstract

The invention relates to the field of the renewable energy with grid-connected operating, in particular to a design method of an automatic generation control model under an intermittent energy grid-connection. The design method of the automatic generation control model under the intermittent energy grid-connection includes the steps of building second-dimensional disturbance source of time-amplitude disturbed by grid-connected intermittent energy, analyzing the power fluctuation feature of a grid, determining a distribution scheme for an automatic generation control (AGC) system assembly, determining the size and the type of the spare power supply of the AGC system, making a control strategy for the AGC system, selecting frequency deviation coefficient and determining the design parameter of automatic generation control model. The design method of the automatic generation control model under the intermittent energy grid-connection relates to the influences of a large-scale wind power and a solar photovoltaic power to a secondary frequency modulation of the power grid, can build an automatic generation control model and the parameter on the basis of the influence, and therefore effectively copes with an intermittent power disturbance of the wind power and the photovoltaic power supply, enhances the secondary frequency modulation effect of the power grid under the intermittent energy power supply fluctuation, and improves the acceptance ability of the power grid for renewable energy.

Description

technical field [0001] The invention relates to the field of grid-connected operation of renewable energy power generation, in particular to a design method for an automatic power generation control model under intermittent energy grid-connected. Background technique [0002] In recent years, with the promulgation of national policies to encourage the development and utilization of clean energy, wind power and solar photovoltaic power generation have developed rapidly. Take the Northwest Power Grid as an example. At present, Gansu has the most wind power installed capacity in the Northwest region. By the end of 2011, there were 44 wind farms in Gansu, generating 7.133 billion kWh, a year-on-year increase of 248.13%. Among them: 40 wind farms in Jiuquan area, generating 6.903 billion kwh; 3 wind farms in Baiyin City, generating 230 million kwh. The maximum power generation output of wind power (April 22) was 2.66 million kilowatts, accounting for 21% of the total power gene...

AI Technical Summary

Problems solved by technology

However, the rapid development of new energy and grid connection have also brought huge challenges to the grid. On the one hand, the grid cannot meet the problems of large-scale wind power and photovoltaic power generation access and transmission. On the other hand, due to the nature of wind power and solar photovoltaic power Belonging to intermittent energy, it has the characteristics of randomness, volatility and poor adjustability. It often requires a large number of other power sources with regulation to suppress its volatility, which increases the difficulty of frequency regulation and peak regulation of the power grid, and greatly increases the rotation of the power grid. spare capacity

However, due to the intermittent energy properties of wind power and photovoltaics, the driving force for their power generation is uncontrollable and unstorable, and cannot be increased or decreased at will. The concept of automatic generation control (AGC) of traditional power plants cannot be applied to the active power of wind power and photovoltaic power sources. control, we must break through the existing ideas of active power control, and study the simulation analysis method of automatic generation control (AGC) design that can take into account the characteristics of intermittent energy sources

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