Regional power grid thermal power frequency modulation unit configuration method considering wind power uncertainty fluctuation

An uncertain, regional power grid technology, applied in computing, data processing applications, instruments, etc., can solve problems such as the influence of system frequency stability

Active Publication Date: 2014-12-10
HARBIN INST OF TECH +3
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  • Application Information

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Problems solved by technology

[0003] In order to solve the problem that large-scale wind power is connected to the grid and affect the system frequency stability, the present invention further proposes a configuration method for regional power grid thermal power frequency modulation units that takes into account the uncertainty and fluctuation of wind power

Method used

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  • Regional power grid thermal power frequency modulation unit configuration method considering wind power uncertainty fluctuation
  • Regional power grid thermal power frequency modulation unit configuration method considering wind power uncertainty fluctuation
  • Regional power grid thermal power frequency modulation unit configuration method considering wind power uncertainty fluctuation

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specific Embodiment approach 1

[0065] Specific implementation mode 1: Combination figure 1 with figure 2 In this embodiment, the process of configuring the thermal power frequency regulation unit of the regional power grid taking into account the uncertainty and fluctuation of wind power is:

[0066] Step 1: Use Mallat's wavelet decomposition and reconstruction algorithm as a tool, and select db10 as the wavelet base to decompose and reconstruct the wind power time series: First, perform wavelet decomposition on the measured wind power data with a sampling interval of nS. The number of layers m is determined by the sampling interval, and the period of the last layer of decomposition should be guaranteed to be n·2 m Exactly 15min or n·2 m Greater than 15min and the closest to 15min, if n·2 m If the difference between 15min and 15min is within 3min, the mth layer is regarded as the hourly average wind power, if n·2 m If the difference between 15min and 15min is greater than 3min, reconstruct the mth layer and m-1...

specific Embodiment approach 2

[0104] Specific implementation manner 2: The establishment of the wind power-containing regional power grid model for frequency modulation analysis in step three of this implementation manner is implemented by using Matlab / Simulink software.

[0105] The other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0106] Specific implementation mode 3: In step 3 described in this embodiment, the process of realizing the primary and secondary frequency modulation capabilities of the quantitative analysis and calculation system based on the frequency modulation capability expression under different conditions is as follows:

[0107] Step 1: Keep the ratio of thermal power primary frequency modulation units unchanged, and calculate the primary frequency modulation ability of the system under different adjustment coefficients; keep the adjustment coefficients of each unit unchanged, and calculate the primary frequency modulation capacity of the system in the ratio of different thermal power primary frequency modulation units; according to the calculation As a result, draw a table with the ratio of thermal power primary frequency modulation unit as the abscissa and the adjustment coefficient as the ordinate, and calculate the different ratios of thermal power primary frequency modulation units an...

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Abstract

The invention relates to a wind power considered thermal power frequency modulation unit configuration method, in particular to a regional power grid thermal power frequency modulation unit configuration method considering wind power uncertainty fluctuation, in order to solve the problem of influence caused on system frequency stabilization after large-scale wind power integration. The method includes: performing decomposition and restructuring of a wind power time sequence by taking a Mallat wavelet decomposition and restructuring algorithm as a tool, establishing an instantaneous model of second-scale and minute-scale wind power plant power uncertainty fluctuation on the basis of a wavelet multi-scale analysis method, giving a time-domain instantaneous expression prior to establishing a wind power regional power grid model used for frequency modulation analysis, giving an expression for representing primary and secondary frequency modulation capacities of the system based on the frequency modulation analysis, and quantitatively analyzing and computing the primary and secondary frequency modulation capacities of the system under different conditions on the basis of the frequency modulation capacity expression. By the method, system frequency fluctuation caused by wind power fluctuation can be reduced, and system frequency stability is maintained. The method is applicable to wind power considered thermal power frequency modulation unit configuration.

Description

Technical field [0001] The invention relates to a configuration method of a thermal power frequency modulation unit considering wind power Background technique [0002] Existing wind power ultra-short-term forecasting technology generally only gives the specific value of wind power at a certain point in time, with a time resolution of 15 minutes, and cannot predict wind power uncertainty fluctuations at a smaller time resolution; and existing models When considering the frequency modulation problem of wind turbines, the active power and reactive power are generally not decoupled, but general considerations are not conducive to effective analysis; when analyzing the impact of wind power fluctuations on the system frequency modulation, the The wind power fluctuations are the same, and the time scale of the second frequency modulation is correspondingly analyzed, which is not conducive to targeted analysis; and the existing power system FM unit configuration method, because the wind...

Claims

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Application Information

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IPC IPC(8): H02J3/24G06Q10/06G06Q50/06
Inventor 郭钰锋王琦朱凌志陈宁钱敏慧姜达军施涛韩华玲
Owner HARBIN INST OF TECH
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