Primary frequency regulation closed loop control method for generator set

Abstract

The invention relates to a primary frequency regulation closed loop control method for a generator set. The method comprises steps: a frequency difference signal between an actual power grid frequency and a power grid standard frequency is acquired; whether the above frequency difference signal is out of a frequency regulation dead zone is judged, if the frequency difference signal exceeds the frequency regulation dead zone, the frequency difference signal is used to obtain a theoretical frequency regulation power according to a corresponding function between the frequency difference signal and a frequency regulation load, and the theoretical frequency regulation power and an instantaneous generator set power in the case of frequency regulation action are overlapped to obtain a power target value for the frequency regulation closed loop control; and the power target value and an actual generator set generation power form a PID closed-loop circuit, and a frequency regulation load instruction is outputted. The method of the invention can accurately control the generator set primary frequency regulation contribution rate, improve the generator set primary frequency regulation qualified rate, and improve the power grid stability and safety.

Description

technical field [0001] The invention belongs to the field of primary frequency modulation of generating sets, and in particular relates to a closed-loop control method for primary frequency modulation of generating sets. Background technique [0002] Grid frequency is the balance relationship between grid load and generator active power. It is an important control parameter for grid operation and is related to many factors such as the safety, stability, and economy of the entire grid. The main purpose of the primary frequency modulation function of the generator set is that when the frequency of the grid changes, each generator set responds quickly and adjusts the active power in time, so that the grid frequency returns to the frequency modulation dead zone, ensuring the safety and stability of the grid frequency. [0003] The contribution rate of primary frequency regulation is the most important evaluation parameter for primary frequency regulation performance of power gri...

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Problems solved by technology

[0006] The invention provides a closed-loop control method for the primary frequency regulation of generator sets, aiming to solve the problem that the primary frequency regulation method of the prior art cannot meet the frequency regulation requirements of all units and under all working conditions, resulting in a low contribution rate of primary frequency regulation of many units

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