Control method for restraining power fluctuation of power system containing doubly-fed wind power plant

Abstract

The invention relates to the technical field of electric power systems containing doubly-fed wind power plants, in particular to a control method for restraining power fluctuation of a power system containing a doubly-fed wind power plant; an SMES superconducting magnetic energy storage device is arranged at an outlet bus of the wind power plant, the balance of electric energy at the grid-connected position is maintained by absorbing or releasing energy by the SMES, and the influence of disturbance caused by the uncertainty of the wind power on the power grid is reduced, so that the purpose ofrestraining the power fluctuation of the electric power system containing the doubly-fed wind power plant is achieved; meanwhile, the SMES can store energy and can quickly release energy, and has a rapid electromagnetic response characteristic and a very high energy storage efficiency; in addition, the SMES is used for storing electromagnetic energy, and other forms of energy conversion are not needed, so that the energy can be stored for a long time without loss; and meanwhile, the advantages of convenience in adjustment and maintenance, no pollution and the like are achieved, so that the system is an optimal choice for inhibiting the power fluctuation of the power system containing the doubly-fed wind power plant.

Description

technical field [0001] The invention relates to the technical field of power systems containing doubly-fed wind farms, in particular to a control method for suppressing power fluctuations of power systems containing doubly-fed wind farms. Background technique [0002] In recent years, new energy power generation technologies represented by wind power have developed rapidly, and more and more large wind farms are connected to the power system. The driving force of the wind turbine is the wind, and the random fluctuation and intermittent nature of the wind determine that the output characteristics of the wind turbine are also fluctuating and intermittent. With the access of large-scale wind farms, the share of wind power capacity in the power system increases, and the impact of wind farm output uncertainty on the power system cannot be ignored. [0003] With the continuous improvement of my country's power grid interconnection, power fluctuations are more likely to occur on l...

AI Technical Summary

Problems solved by technology

[0004] Today's society has higher and higher requirements for power quality, safety and reliability. Due to the continuous growth of power loads and regional exchange power in interconnected large systems, under the traditional centralized power transmission and distribution mode, long-distance large-capacity power transmission is inevitable. This will lead to the reduction of system stability and security, and the degradation of power quality.

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