Pumped storage power station regional load frequency control method and system

Abstract

The invention discloses a pumped storage power station regional load frequency control method and system. The method comprises steps that a two-region reheating type turboset load frequency control model considering a nonlinear link; a fractional order PID controller is established; load frequency control of the two-region reheating type turboset is realized based on the fractional order PID controller; fractional order PID load frequency control under the working conditions of power generation and water pumping of a pumped storage power station is realized based on a two-stage working model of the pumped storage power station. According to the pumped storage power station load frequency control method, nonlinear factors existing in an actual power system are considered, and defects of a traditional linear model are overcome. Through designed fractional order PID load frequency control, better precision, control effect and robust stability in the face of high-power vacancy still can beobtained. Through effective combination of the fractional order PID controller and pumped storage power station load frequency control, reliability of power grid frequency control and stability of power system operation are further improved.

Description

technical field [0001] The invention belongs to the technical field of regional load frequency control of a pumped storage power station, in particular to a method for controlling the regional load frequency of a pumped storage power station. Background technique [0002] The current unit structure of the power grid is dominated by thermal power units, supplemented by wind power, solar power and other new energy power generation. At the same time, a large amount of external power is introduced through ultra-high voltage direct current and alternating current. However, in the face of major accidents and extreme natural weather disasters, external transmission lines may still be interrupted. In the case of accidents such as large power shortages on external transmission lines, how to quickly, timely and safely deal with emergency disturbances is a major challenge for the current power grid, and it is also an important task that needs to be solved urgently. [0003] Load frequ...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the parameter setting of the load frequency control of the current pumped storage unit is mainly based on the dynamic characteristics of the pumped storage power station itself, and it is difficult to deal with complex nonlinear systems. A method for controlling the regional load frequency of the pumped storage power station is proposed and system

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