Wind turbine power control system applying super capacitor

A supercapacitor and fan technology, applied in the field of fan power control system, can solve problems such as unstable output, unstable wind energy, and inability to connect to the grid on a large scale, and achieve the effect of a simple algorithm

CN102780229BActive Publication Date: 2015-01-14CRRC WIND POWER(SHANDONG) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-01-14

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Abstract

The invention discloses a wind turbine power control system applying a super capacitor. The wind turbine power control system comprises a wind turbine and a wind turbine control device. A rotor side converter (RSC) and a grid side converter (GSC) in the wind turbine control device are electrically connected and at the same time are connected with an arranged super capacitor system, and the super capacitor system is electrically connected with a control system of the arranged super capacitor system. The wind turbine power control system has the beneficial effects that after being tested by a small experimental prototype, the system has strong power retention feature and can adjust the size of the output power of the wind turbine according to power network dispatching requirements at any time and reduce the influence on the output of the wind turbine from the fluctuation of the wind speed. The wind turbine power control system is high in integration degree, big in power density, small in unit size and light in weight and has strong low-voltage ride through (LVRT) ability. Therefore, with the large-scale development of wind turbines nowadays, the wind turbine power control system has great application significance.
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Description

technical field

[0001] The invention relates to a power control system, in particular to a fan power control system using a supercapacitor. Background technique

[0002] At present, the control of the wind power generating set is usually controlled according to the maximum output, but the wind changes randomly at any time, which causes the fluctuation of the electric energy produced by the wind generating set. At present, the installed capacity of wind power only accounts for 1% to 2% of the grid capacity, and the fluctuation of the electric energy of wind turbines does not affect the power dispatching of the grid and the economic operation of the grid.

[0003] However, with the rapid development of wind power in the world, the explosive growth of wind power enterprises, the continuous increase of wind power installed capacity, and the continuous increase of the proportion of wind power in grid power supply. Experts predict that in the next three decades, wind power grid-c...

Examples

Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] figure 1 The embodiment is a fan power control system using a supercapacitor, in which a supercapacitor system 8 and its control system are added on the basis of the provided fan and fan control device.

[0033] The system includes a fan and a fan control device, the fan includes a blade 1, the blade 1 is connected to a gearbox 2 through a shaft, the gearbox 2 is connected to a (DFIG) double-fed induction generator 3, and (DFIG) a double-fed induction generator The generator is connected to the step-up transformer 5 through the stator grid-connected switch 4, and the step-up transformer 5 is connected to the power grid 6, and a supercapacitor system 8 is provided on the electrical path between the (DFIG) doubly-fed induction generator 3 and the step-up transformer 5 , a reactor 7 is connected in series with the supercapacitor system 8 on the set...