Control method and control system for wind power participating frequency modulation of electric power system

A technology of power system and control method, which is applied in the control method and system field of wind power participating in power system frequency modulation, and can solve problems such as inability to provide sufficient support, reduce the service life of wind turbines, and inability to realize overspeed control, so as to improve the dynamic frequency Effects of responsiveness, enhanced inertia, and reduced steady-state frequency deviation

Active Publication Date: 2017-05-31
STATE GRID SHANXI ELECTRIC POWER
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  • Application Information

AI Technical Summary

Problems solved by technology

The response speed of rotor kinetic energy control is fast, but it can only provide frequency support in the dynamic process, and the duration is short, so it cannot provide sufficient support for large load disturbances. The control can provide a frequency reserve, but it needs to change the pitch angle frequently, which will increase the wear of the mechanical part and reduce the service life of the fan; for the overspeed control, the overspeed control cannot be realized when the wind speed is high, and the derating operation and Economically contradictory

Method used

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  • Control method and control system for wind power participating frequency modulation of electric power system
  • Control method and control system for wind power participating frequency modulation of electric power system
  • Control method and control system for wind power participating frequency modulation of electric power system

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Embodiment 1

[0073] The simulation study adopts a classic 4-machine 2-area system, such as Figure 6 shown. The system contains 11 nodes, and the wind farm and battery energy storage system with rotor kinetic energy control are respectively integrated into B through a transformer. 2 On the No. bus, the configuration capacity of the battery energy storage system is 30MVA, the wind field is 200MW (2MW×100), and the wind speed is constant at 8m / s. G 1 , G 2 , G 3 Each has a capacity of 800MW and is equipped with a governor and a power system stabilizer. System load L 1 , L 2 The sizes are 1600MW and 900MW respectively; L 0 is the disturbance load. The entire simulation process lasts for 15s, and the system load is disturbed at 5s. The frequency response characteristics of no-frequency control, rotor kinetic energy control, battery energy storage system and their combined control are compared by simulation.

[0074] When the system load is disturbed by 5% at the time of 5s, the frequ...

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Abstract

The invention provides a control method and a control system for wind power participating frequency modulation of an electric power system. The control method comprises regulating and controlling the frequency of the electric power system by using rotor kinetic energy and a storage battery energy storage system. According to the control method for wind power participating frequency modulation of the electric power system based on combined effect of the rotor kinetic energy and the storage battery energy storage system, the wind energy is sufficiently utilized, the configuration capacity of the energy storage system is reduced, and the economical efficiency of wind field operation is improved. The control method and the control system can also play better roles even under the condition of relatively great load disturbance.

Description

technical field [0001] The present invention relates to the technical field of wind power generation, and more specifically, to a control method and system for wind power participating in power system frequency modulation. Background technique [0002] As of the end of 2015, the new installed capacity of wind power in the world has reached 63.013GW, and the total installed capacity of wind power in the world has exceeded 430GW. The penetration rate of wind power in the power grid continues to increase, which brings new problems to the frequency regulation of the power system. Wind turbines controlled by inverters cannot participate in system frequency adjustment without additional control; wind turbines usually operate at the Maximum Power Point (MPP), cannot provide active power backup, and do not have the same frequency modulation capabilities as synchronous machines. The safe and stable operation of the system cannot be guaranteed. [0003] At present, scholars have cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46H02J3/38H02J3/28H02J3/32
CPCH02J3/28H02J3/32H02J3/386H02J3/46Y02E10/76Y02E70/30
Inventor 赵嘉兴高伟上官明霞查效兵岳帅
Owner STATE GRID SHANXI ELECTRIC POWER
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