The Method of Improving the Deh Primary Frequency Regulation Performance of Steam Turbine Generator Set

Abstract

The invention relates to the technical field of primary frequency regulation of a turbogenerator set, and is a method for improving the performance of primary frequency regulation of a turbogenerator set DEH, including S1: detecting the frequency difference of the turbogenerator set; S2: judging whether the frequency difference exceeds the frequency difference dead zone ; S3: using given main steam flow as the target value of DEH primary frequency modulation; S4: converting the control quantity of frequency signal variation into the output signal of main steam flow to the PID controller; S5: asking for main steam flow control feedforward; S6 : The main steam flow command is converted into the door opening and the door opening of the main steam flow control feedforward output is superimposed and summed to generate a comprehensive door opening signal. The present invention controls the main steam flow through the DEH closed-loop mode, so that the power generated by the primary frequency modulation of the turbogenerator DEH includes two parts: one is the power generated by the main steam flow change; the other is the synchronous transient power generated by the speed signal change. Through the control and adjustment of the main steam flow, the primary frequency regulation performance of the turbo-generator unit DEH is restored to normal.

Description

Method for improving DEH primary frequency regulation performance of turbo-generator set technical field The present invention relates to the technical field of primary frequency regulation of turbo-generator set, and is a kind of improving the DEH once of turbo-generator set. method for FM performance. Background technique At present, the frequency of the power grid is an important indicator of power quality, and the frequency of the power grid reflects the generator active power and electricity consumption. The balance relationship between loads is an important control parameter for the safe and stable operation of the power system. Improve the DEH of the turbo-generator set The performance of sub-frequency regulation is very important to ensure the safe and stable operation of large power grid frequencies and to improve the power quality of the power system. significance. Before the 1990s, the small and medium-sized steam turbine generator sets in the power gri...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method for improving the primary frequency regulation performance of a turbo-generator set, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the primary frequency regulation pass rate of the existing turbo-generator set is low and prone to wrong frequency regulation question

Images