Optimization method and device for enabling stored energy to participate in kinetic energy frequency modulation of fan rotor
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: 2021-08-31
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 list
[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 Figur...
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The invention discloses an optimization method and device for participation of energy storage in fan rotor kinetic energy frequency modulation, and belongs to the technical field of electrical engineering. The method comprises the steps: judging whether energy storage is input for frequency modulation or not based on system frequency deviation, and when energy storage is not needed, taking rotor kinetic energy control frequency modulation output and rotor kinetic energy control exit moment as decision variables; optimizing a decision variable with the goal of minimizing the maximum value of the frequency deviation at the lowest points of the frequencies in the production stage and the recovery stage; when energy storage needs to be input, optimizing the decision variables by taking the rotor kinetic energy control frequency modulation output, the rotor kinetic energy control exit moment and the energy storage frequency modulation power as decision variables and taking the minimum energy storage frequency modulation power as the target. Therefore, the frequency drop problem in the kinetic energy control process of the fan rotor can be effectively reduced, the energy storage output is reduced as much as possible, and the frequency modulation economy of the system is improved.
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 synchronous machines by new energy sources. The frequency modulation mode using the kinetic energy of the rotor can make the wind turbine run at the maximum power point, which is more economical 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 recovery of the rotor speed 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 contr...
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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