An optimization method and device for energy storage to participate in frequency modulation of fan rotor kinetic energy
A technology of fan rotor and rotor kinetic energy, applied in circuit devices, AC network voltage adjustment, power network operating system integration, etc.
Active Publication Date: 2022-04-01
HUAZHONG UNIV OF SCI & TECH
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[0004] In view of the defects of the prior art, the purpose of the present invention is to provide an optimization method and device for energy storage to participate in the frequency modulation of the kinetic energy of the fan rotor, aiming to solve the existing technology of poor frequency modulation effect of the wind storage system and high energy storage input cost question
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[0128] The parameter values of the system are shown in Table 1:
[0129] Table 1 System parameter table
[0130]
[0131]
[0132] When the load change is small, set ΔP d =0.4MW, the fan and the traditional unit can meet the frequency regulation requirements, and the energy storage does not operate. According to the control method, the optimal output and the optimal exit time of the fan rotor kinetic energy control frequency regulation can be obtained respectively as ΔP f =0.0871MW,t off = 35.8923s.
[0133] Such as Figure 4 As shown, the system frequency response minimum value f min =49.83Hz, the maximum frequency deviation Δf max =0.17Hz, if ΔP f Slightly smaller or larger will produce a larger frequency drop.
[0134] Such as Figure 5 As shown, the system frequency response minimum value f min =49.83Hz, the maximum frequency deviation Δf max = 0.17Hz, t off Slightly smaller or larger will equally produce a larger frequency drop.
[0135] Such as Figu...
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The invention discloses an optimization method and device for energy storage to participate in frequency modulation of fan rotor kinetic energy, which belongs to the technical field of electrical engineering. Firstly, based on the system frequency deviation, it is judged whether to invest in energy storage for frequency modulation. Frequency modulation output and rotor kinetic energy control exit time are decision variables, with the goal of minimizing the maximum value of the frequency deviation at the lowest point of frequency in the overproduction stage and the recovery stage, the decision variable is optimized; when energy storage needs to be put into use, the rotor Kinetic energy control frequency modulation output, rotor kinetic energy control exit time and energy storage frequency modulation power are decision variables, and the decision variables are optimized with the goal of minimizing energy storage frequency modulation power. In this way, the present invention can effectively reduce the frequency drop problem in the process of controlling the kinetic energy of the fan rotor, reduce the output of energy storage as much as possible, and improve the economy of system frequency regulation.
Description
technical field [0001] The invention belongs to the technical field of electrical engineering, and more specifically relates to an optimization method and device for energy storage participating in frequency modulation of kinetic energy of a fan rotor. Background technique [0002] Adding an auxiliary frequency control module to the wind turbine is a solution to the frequency security problem of the power system caused by the replacement of the synchronous machine by new energy. The frequency modulation mode using the kinetic energy of the rotor can make the wind turbine run at the maximum power point, and the economy is better than the power backup mode. However, when there is a power shortage in the system, the rotor decelerates to release energy to participate in frequency regulation, and the rotor speed recovery may cause a secondary frequency drop hazard to the power system. It is necessary to reduce the frequency drop as much as possible through related control optimiza...
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IPC IPC(8): H02J3/24H02J3/28H02J3/46H02J3/14
CPCH02J3/24H02J3/28H02J3/466H02J3/144H02J2203/20H02J2300/40H02J2300/28Y04S20/222Y02B70/3225
Inventor 陈霞陈思源杨丘帆周建宇文劲宇
Owner HUAZHONG UNIV OF SCI & TECH