Disturbance generation device for wind power station

A technology for generating devices and wind farms, applied in circuit devices, harmonic reduction devices, electrical components, etc., can solve problems such as low voltage ride-through capability, impact on safe and stable operation of the power grid, and wind turbines that do not have performance and capabilities

Active Publication Date: 2011-08-10
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
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Problems solved by technology

[0003] Since my country's wind power industry is still in its infancy, most of the wind turbines produced or purchased have not been tested for active power, reactive power, frequency regulation, low voltage ride-through capability, and anti-interference capability, and most of the wind turbines that are connected to the grid Without the above performance and capabilities, it will have a great impact on the safe and stable operation of the power grid

Method used

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  • Disturbance generation device for wind power station
  • Disturbance generation device for wind power station
  • Disturbance generation device for wind power station

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Embodiment Construction

[0039] The technical solution of the present invention is: the disturbance device is placed between the power grid and the wind field, and the disturbance device generates various voltages for wind turbine testing, which consists of two parts: a low-frequency voltage disturbance device and a high-frequency voltage disturbance device, see figure 1 shown. figure 1 Among the circuit breakers in the main circuit of QF1, QF2, QF3, QF4, QF5 and QF6, the required disturbance devices can be put into operation by controlling the breaking of the circuit breakers according to actual requirements.

[0040] Under normal circumstances, the output rated power of the fan is relatively large. Considering the working conditions such as voltage fluctuation and negative sequence in the fan test, the main circuit structure of the low-frequency voltage disturbance device is as follows: figure 2 As shown, it consists of a starting resistor 3, a step-down transformer 4, a filter 5, a parallel conver...

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Abstract

The invention provides a disturbance generation device which is used for detecting the network access of a wind generating set and detecting and evaluating the grid-connected operation of a large-scale wind power station. The disturbance generation device generates various voltages for wind generator test, and comprises a low-frequency voltage disturbance device and a high-frequency voltage disturbance device, wherein the low-frequency voltage disturbance device is composed of a starting resistor, a reduction transformer, a filter, a parallel voltage source current converter module and a boosting transformer, and is used for realizing the function of low-frequency voltage disturbance; and the high-frequency voltage disturbance device is composed of a starting resistor, a rectifier transformer, a pulse-width modulation (PWM) rectifier module, a cascading H-bridge module and a filter, and is used for realizing the function of outputting second to twenty-fifth harmonic voltage, thereby realizing two-way flow of energy and meeting requirements of the wind generator for switching between a power-driven state or a power generation state.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a wind farm disturbance generating device. Background technique [0002] As a kind of fluctuating power source, wind power is difficult to dispatch, and large-scale wind power grid-connected operation has a certain impact on the safe and stable operation of the power system. When the power grid is disturbed (including voltage fluctuations, frequency fluctuations or three-phase voltage imbalance, etc.), large-scale wind farms that are connected to the grid must have good grid adaptability, including active power regulation, reactive power regulation, and frequency regulation. and anti-interference ability. [0003] Since my country's wind power industry is still in its infancy, most of the wind turbines produced or purchased have not been tested for active power, reactive power, frequency regulation, low voltage ride-through capability, and anti-interference capability, and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/38H02J3/01
CPCY02E40/40
Inventor 周飞赵国亮邓占峰
Owner CHINA ELECTRIC POWER RES INST
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