Wind Power Suppression Control Method Based on Digital Band-Stop Filter
A technology of band-stop filter and control method, applied in the direction of reducing/preventing power oscillation, wind power generation, single-network parallel feeding arrangement, etc., can solve problems such as low rate of return, volatility, restricted access, etc., and achieve target power Clear, adaptable, and accurately extracted effects
Active Publication Date: 2020-03-10
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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Problems solved by technology
In the current power system, the proportion of new energy represented by wind power is getting higher and higher, but due to its own characteristics such as volatility and randomness, the quality of power supply deteriorates, thus limiting access
[0003] The energy storage system is considered as one of the effective means to improve the smooth grid connection of distributed power generation because it can shift the energy in time and space. widely used
Method used
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specific Embodiment
[0077] Specific embodiments: the present invention is based on the wind power smoothing control method of digital band stop filter, comprises the following steps:
[0078] First, use PSCAD / EMTDC software to build the whole system, assuming that the wind speed change of the wind turbine within 100s is as follows: figure 2 As shown, at this wind speed, the corresponding output wind power of the doubly-fed wind turbine is as follows: image 3 shown. Wind power P wind Perform Fourier decomposition to obtain the frequency distribution of wind power fluctuations as Figure 4 shown. PSCAD / EMTDC software is well known in the art.
[0079] image 3 It shows that the output active power of the wind turbine fluctuates with the change of wind speed, and its instantaneous fluctuation amplitude is close to 2000kW. Fourier analysis is performed on the wind power to obtain the spectrum diagram of the fluctuating power of the wind turbine, as shown in Figure 4 shown. Depend on Figur...
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In view of a sensitive frequency band existing in wind power fluctuation, the invention provides a wind power stabilization control method based on a digital band stop filter. Through designing a control algorithm for the digital band stop filter, corresponding parameters are changed, the central frequency and the bandwidth of the filter are adjusted, the parameters are applied to a wind power stabilization control system, improvement effects on the wind farm fluctuation power stabilization control by the control algorithm for the band stop filter are analyzed, and target reference power in need of throughput by an energy storage system is obtained, the control effect that the energy storage system and the filter are matched to together stabilize wind power fluctuation can be realized, the fluctuation power can be extracted accurately, the target power for throughput by the energy storage system is clear, and the method is scientific, reasonable, strong in applicability and good in effects.
Description
technical field [0001] The invention relates to a filter control algorithm, which is a wind power suppression control method based on a digital band-stop filter, and is used for smoothing output power fluctuations of wind farms represented by wind power. Background technique [0002] With the increasing installed capacity of wind power, the development of renewable energy such as wind power has received high attention. In the current power system, the proportion of new energy represented by wind power is getting higher and higher, but due to its own characteristics such as volatility and randomness, the quality of power supply deteriorates, thus limiting access. [0003] The energy storage system is considered as one of the effective means to improve the smooth grid connection of distributed power generation because it can shift the energy in time and space. widely used. Therefore, using a digital band-stop filter to suppress the sensitive frequency bands of wind power flu...
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IPC IPC(8): H02J3/24H02J3/38H02J3/28
CPCH02J3/24H02J3/28H02J3/386Y02E10/76
Inventor 葛延峰李军徽蒋莲严干贵李大路
Owner STATE GRID LIAONING ELECTRIC POWER RES INST