Energy storage battery-based control method and system for primary frequency regulation of power grid
A technology of energy storage battery and control method, which is applied in the direction of AC network load balancing, single-network parallel feeding arrangement, etc., and can solve the problems of secondary drop of system frequency and short service life of energy storage battery, etc.
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[0060] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other if there is no conflict.
[0061] The technical solutions of the present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.
[0062] This application adopts a control method that combines virtual inertia control and virtual droop control to realize the switching of energy storage battery operating modes under different frequency modulation requirements, complementing each other's advantages, and better meeting the frequency modulation requirements of the power grid.
[0063] Such as figure 1 As shown, in the virtual droop control link, the system frequency deviation Δf is used as the input quantity to obtain the power deviation ΔP proportional to the frequency deviation 1 ,which is:
[0064] ΔP 1 =K E Δf
[0065] It can be seen from the above expression that the direction of energy storag...
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