Rapid active control method for system frequency modulation requirements corresponding to new energy power generation

Abstract

The invention discloses a rapid active power control method for a frequency modulation demand of a system corresponding to new energy power generation. The method comprises the following steps: S1, analyzing inertia response support power change and maximum frequency deviation; S2, in the initial stage of inertia response, simulating the inertia response of the generator by adopting positive virtual inertia control, and drawing a first frequency fluctuation diagram of the inertia response; S3, when the inertia response attenuates along with the rotating speed of the fan rotor, controlling theinertia response through the negative virtual inertia imported by the parameters, and drawing a second frequency fluctuation diagram; S4, respectively importing the respective frequency values in thestep 2 and the step 3 into a frequency modulator; S5, in the frequency modulator, controlling the deviation value of the output frequency and the maximum frequency deviation to approach zero by changing the frequency input values of the positive virtual inertia control and the negative virtual inertia control, wherein the rapid active control method for the frequency modulation demand of the system corresponding to the new energy power generation can accelerate the recovery of the frequency and realize the primary frequency modulation of the new energy, and the stability of power grid frequency is improved.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a fast active power control method for new energy power generation to meet system frequency modulation requirements. Background technique [0002] Most of the power sources in the power grid are synchronous generator sets with large inertia such as steam turbine generator sets (thermal power, gas, nuclear power plants, etc.) and hydroelectric generator sets. Ability to keep the frequency of the power grid relatively stable. [0003] However, after large-scale access to photovoltaic and wind power, new energy power generation equipment does not have the inertia and primary frequency modulation capability to respond to system frequency changes. After inertia response, wind power will decrease with the decrease of speed, and even cause damage to the power grid during operation. The secondary power impact seriously affects the stability of the grid frequency. Contents of th...

AI Technical Summary

Problems solved by technology

[0003] However, after large-scale access to photovoltaic and wind power, new energy power generation equipment does not have the inertia and primary frequency modulation capability to respond to system frequency changes. After inertia response, wind power will decrease with the decrease of speed, and even cause damage to the power grid during operation. The secondary power shock seriously affects the stability of the grid frequency

Images