Novel primary frequency-modulation compensation control method of unit thermal generator set

Abstract

The invention discloses a novel primary frequency-modulation compensation control method of a unit thermal generator set, comprising the following steps of: 1) adding upper and lower limit values according to an instantaneous generation load instruction and primary frequency modulation of the generator set; automatically calculating a primary frequency-modulation theoretical compensation load limited amplitude according to an algorithm module and setting high and low limited amplitudes of an H / L amplitude limiting module; 2) calculating a primary frequency-modulation theoretical compensation load value through a set function F1(x) according to a power grid operation frequency fluctuation difference value or a turbine rotating fluctuation value; and limiting a primary frequency-modulation compensation instruction of the generator set in a range from minus delta P to delta P through guaranteeing that the frequency modulation motion does not exceed the normal adjusting range of the generator set through the H / L amplitude limiting module; and 3) revising primary frequency-modulation compensation and operating a real-time adjusting-grade pressure, a main steam pressure and a main air temperature parameter according to the generator set; and calculating and revising a primary frequency-modulation instruction through a F2(x) to be output. The novel primary frequency-modulation compensation control method of the unit thermal generator set guarantees that the primary frequency-modulation motion of the generator set meets the design requirements and stabilizes a power supply frequency of a power grid.

Description

technical field [0001] The invention relates to a frequency modulation compensation control method of a thermal power generating set, in particular to a novel primary frequency modulation compensation control method of a unit thermal power generating set. Background technique [0002] Thermal power generating units occupy an important position in my country's electric power production. With the development of large-scale generating units and the construction of UHV and smart grids in my country, the requirements for flexible frequency modulation functions of thermal power generating units are getting higher and higher. However, the reality is that due to the influence of factors such as fuel quality and unit operation mode, the primary frequency regulation performance of the unit cannot realize the predetermined frequency compensation according to the unit design, which in turn affects the power supply quality of the power grid. [0003] There are clear requirements for the ...

AI Technical Summary

Problems solved by technology

According to the current primary frequency regulation design of the unit, when the unit is running under sliding pressure, especially when the opening of the regulating valve of the unit is large, the primary frequency regulation capability of the unit decreases significantly, and the designed output cannot be completed, which affects the power supply quality of the power grid

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