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Configuration method of thermal power frequency modulation units in regional power grid 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

Inactive Publication Date: 2017-06-20
HARBIN INST OF TECH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Configuration method of thermal power frequency modulation units in regional power grid considering wind power uncertainty fluctuation
  • Configuration method of thermal power frequency modulation units in regional power grid considering wind power uncertainty fluctuation
  • Configuration method of thermal power frequency modulation units in regional power grid considering wind power uncertainty fluctuation

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specific Embodiment approach 1

[0065] Specific implementation mode one: combine figure 1 and figure 2 To illustrate this implementation mode, the process of configuring the thermal power frequency regulation unit configuration method of the regional power grid considering the uncertainty fluctuation of wind power is as follows:

[0066] Step 1: Use the Mallat 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, and specifically decompose The number of layers m is determined by the sampling interval, and the last layer period of decomposition should be guaranteed to be n·2 m Exactly 15min or n·2 m Greater than 15min and closest to 15min, if n·2 m If the difference between 15min and 15min is within 3min, the m-th layer is regarded as the hourly average wind power at the hourly level, if n·2 m If the diffe...

specific Embodiment approach 2

[0104] Embodiment 2: The establishment of a regional power grid model including wind power for frequency modulation analysis in step 3 described in this embodiment is realized by using Matlab / Simulink software.

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

specific Embodiment approach 3

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

[0107] Step 1: Keeping the ratio of thermal power primary frequency regulation unit constant, calculate the primary frequency regulation capability of the system under different differential coefficients; keep the differential coefficient of each unit constant, and calculate the primary frequency regulation capability of the system in different thermal power primary frequency regulation unit ratios; according to the calculation As a result, draw a table with the proportion of thermal power primary frequency modulation units as the abscissa and the adjustment coefficient as the vertical axis, and from the data in the table, the influence rules of differe...

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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 regulation unit considering wind power Background technique [0002] The existing wind power ultra-short-term forecasting technology generally only gives the specific value of wind power at a certain point in time, and the time resolution is 15 minutes, which cannot predict the uncertainty fluctuation of wind power at a smaller time resolution; and the existing model When considering the frequency modulation of wind turbines, active power and reactive power are generally not decoupled, but generally considered, which is not conducive to effective analysis; when analyzing the impact of wind power fluctuations on system frequency modulation, they do not take into account The analysis of the same wind power fluctuation and the corresponding time scale of the secondary frequency regulation is not conducive to targeted analysis; and the existing power system frequency regulation un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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