A fast frequency regulation method for energy storage based on active power unbalanced distance
A technology of balancing distance and energy storage, applied in wind power generation, single grid parallel feeding arrangement, reducing/preventing power oscillation, etc., can solve the problems of high configuration cost, waste of resources, poor effect of fast frequency regulation, etc., and achieve efficient operation. , reducing capacity requirements and improving the effect of fast frequency modulation
Active Publication Date: 2020-05-22
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +4
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However, how to reasonably configure energy storage capacity is one of the key technologies for energy storage to participate in the rapid frequency regulation of the system. Larger configuration capacity will lead to higher configuration costs and waste of resources. The fast frequency regulation method of distance energy storage can not only meet the fast frequency regulation requirements of the system but also minimize the cost of energy storage configuration
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[0047] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0048] Such as figure 1 As shown, a fast frequency regulation method for energy storage based on active power unbalanced distance, the basic principle is: according to the natural frequency characteristic equation of the power system, after the active power disturbance occurs, the frequency change curve is obtained through dynamic frequency numerical simulation, and then the maximum deviation of the system frequency is obtained and the steady-state deviation, thus giving the definition of the active power unbalance distance of the power system during the frequency drop and frequency recovery stages, and calculating the active power unbalance distance by combining the frequency de...
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The invention discloses an energy storage fast frequency modulation method based on active power unbalance distance, At first, base on that natural frequency characteristic equation of power system,Frequency curves are obtained by numerical simulation of dynamic frequency when active power disturbance occurs, Then, the active power unbalance distance is calculated according to the defined activepower unbalance distance in frequency sag and frequency recovery phase of power system, and the active power unbalance distance is calculated according to the frequency deviation of power system after disturbance. Adaptive fuzzy logic control strategy is used to dynamically adjust the active power output of energy storage system in frequency sag phase and recovery phase. The method provided by the invention is suitable for a plurality of power network operation conditions, realizes high-efficiency operation of energy storage on the basis of meeting the fast frequency modulation requirements of the power system, and reduces the capacity configuration requirements thereof.
Description
technical field [0001] The invention belongs to the technical field of energy storage participating in power system frequency control, and relates to an energy storage fast frequency regulation method based on active power unbalanced distance. Background technique [0002] Because the active power control of mainstream variable-speed wind turbines generally does not actively participate in frequency regulation, large-scale wind power grid integration poses challenges to the rapid frequency regulation of power systems. The energy storage system has the advantages of fast active power response, which can improve the dynamic frequency response characteristics of the system, slow down the frequency drop speed and reduce the maximum frequency deviation after a system failure, and improve the stability of the system frequency operation. However, how to reasonably configure energy storage capacity is one of the key technologies for energy storage to participate in the rapid frequen...
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IPC IPC(8): H02J3/48H02J3/38H02J3/24
CPCH02J3/24H02J3/386H02J3/48Y02E10/76
Inventor 樊海锋刘文龙徐春雷张琦兵彭志强杨明韩禹尹永昌余璟郑明忠
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST