Large-scale wind electricity and high energy-carrying load coordination control method

Abstract

The invention discloses a large-scale wind electricity and high energy-carrying load coordination control method. The large-scale wind electricity and high energy-carrying load coordination control method comprises the steps of defining the output of a wind power plant as a negative load according to the output short-term prediction curve and a load prediction curve of the wind power plant, overlaying an original load with the negative load and forming an equivalent load curve; according to the equivalent load curve, on the basis of considering the operation conditions of a wind power generating unit and a thermal power generating unit and the constraint conditions of the units, making generation plans of the wind power generating unit and the thermal power generating unit; according to the generation plan and the rated capacity of the thermal power generating unit, determining the spare capacity of the thermal power generating unit, adopting part of the spare capacity as the wind power pitch peak, and using another part of the spare capacity as the margin of the spare capacity; and when the wind power fluctuates, according to the spare capacity, used as the wind power pitch peak, of the thermal power generating unit, inhibiting the fluctuation of the wind power by adjusting the output power of the thermal power generating unit. The large-scale wind electricity and high energy-carrying load coordination control method has the advantages of being capable of achieving high output, large in application range and good in stability.

Description

technical field [0001] The invention relates to the technical field of wind power grid connection, in particular to a coordinated control method for large-scale wind power and high-energy loads. Background technique [0002] Due to the randomness and intermittent characteristics of wind energy, the utilization of wind energy has certain uncertainties. At the same time, with the continuous progress of modern wind power generation technology, the single-unit capacity of wind turbines continues to increase. More and more wind farms are connected to the transmission network on a large scale, which makes the impact of wind power on the grid continue to increase. [0003] Compared with conventional power generation methods such as hydropower and thermal power, the most fundamental difference of wind power lies in the randomness, intermittentness and uncontrollability of its active output. This feature determines that when wind power is connected to the grid, the conventional pow...

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Problems solved by technology

[0006] In the process of realizing the present invention, the inventors found that at least there are defects such as low output, small scope of application and poor stability in the prior art

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