Optimal control method and device for primary frequency modulation of thermal power units based on time compensation

Abstract

The invention discloses a time compensation-based thermal power unit primary frequency modulation optimization control method and device, including: if the absolute value of the unit speed deviation signal Δn does not exceed the primary frequency regulation dead zone range specified by the power grid, the normal primary frequency modulation compensation amount ΔP1 of the unit is 0 , the unit load compensation ΔP is 0; if the absolute value of the unit speed deviation signal Δn exceeds the primary frequency regulation dead zone specified by the power grid, the normal primary frequency regulation compensation ΔP1 of the unit is determined according to the primary frequency regulation compensation function, and the unit is determined according to Δn exceeding the dead zone limit The value time determines the size of the unit’s additional load compensation, and the unit’s load compensation ΔP is the sum of the unit’s normal primary frequency adjustment compensation ΔP1 and the additional load compensation ΔP3. The invention has beneficial effects: while ensuring that the unit does not malfunction, refuse to operate, and operate infrequently, it effectively meets the requirements of the power grid for primary frequency regulation of the unit, and satisfies the demand for frequency regulation and peak regulation.

Description

technical field [0001] The invention relates to the field of frequency modulation of thermal power units, in particular to a method and device for optimal control of primary frequency modulation of thermal power units based on time compensation. Background technique [0002] With new energy connected to the grid, load growth and the scale of the grid continue to increase, under the new situation of the interconnection of the UHV grid and the regional grid, the connection between the grids at all levels is becoming increasingly close, and the requirements for coordination and cooperation between the grid and the unit are also increasing. The higher the value, the primary frequency regulation in the network plant coordination function becomes one of the effective means to stabilize the power grid. The primary frequency regulation function of the generator set is an inherent function of the turbogenerator set. It is mainly through adjusting the steam inlet control door of the D...

AI Technical Summary

Problems solved by technology

[0005] Due to the rapidity and transient characteristics of primary frequency regulation, its adjustment curve is mainly reflected in the form of sharp pulses on the power plant unit side. At the same time, due to the high sampling accuracy of WAMS data (40ms), the actual frequency, power and other parameter curves contain many Glitch, the scheduling side has carried out filtering processing, so the actual frequency modulation response is affected by the conversion calculation of various systems and the influence of network transmission and other factors, there will inevitably be a certain attenuation, resulting in the response amplitude in the actual assessment not reaching the assessment standard Require

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