User harmonic hazard early warning evaluation method based on interval monitoring data

A technology of monitoring data and harmonics, applied in the field of early warning and evaluation of user harmonic hazards based on interval monitoring data, can solve problems such as the inability to predict user harmonic hazards and the inability to provide decision-making basis for high-quality power grid operation, and achieve strong engineering practicability and Promoting the effect of app value

Active Publication Date: 2019-11-19
STATE GRID PUTIAN ELECTRIC POWER SUPPLY +2
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Problems solved by technology

However, the user's harmonic pollution is closely related to user parameters and grid operation mode, and the harmonic monitoring data of the grid can only reflect the harmonic current injected by the user under the influence of the current grid operation mode and user parameters
Since the harmonic current injected by the user changes due to the change of the system operation mode, the harmonic monitoring data can only reflect the current harmonic hazard of the user, but cannot predict the future harmonic hazard of the user
Therefore, it is somewhat one-sided to evaluate users’ harmonic pollution based on the current harmonic monitoring data. The existing harmonic monitoring methods have distinct qualitative judgment and post-evaluation characteristics, and cannot provide decision-making basis for high-quality operation of the power grid.

Method used

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  • User harmonic hazard early warning evaluation method based on interval monitoring data
  • User harmonic hazard early warning evaluation method based on interval monitoring data
  • User harmonic hazard early warning evaluation method based on interval monitoring data

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Embodiment Construction

[0064] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0065] The user harmonic hazard early warning and evaluation method based on interval monitoring data according to the present invention, such as figure 1 As shown, the steps include:

[0066] 1) Based on the harmonic monitoring device, the time-series statistical value of the interval harmonic current injected by the user is measured;

[0067] 2) Build an interval autoregressive model according to the time series statistical value of interval harmonic current;

[0068] 3) Calculate the regression coefficient of the user interval autoregressive model;

[0069] 4) Calculate the minimum value and maximum value of the interval harmonic current injected by the user in the future based on the regression coefficient;

[0070] 5) According to the predicted minimum and maximum values ​​obtained in step 4), evaluate the harmonic hazard level of the...

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Abstract

The invention relates to a user harmonic hazard early warning evaluation method based on interval monitoring data, which is used for evaluating the harmonic hazard of a user by predicting the harmoniccurrent injected by the user after future user parameters and a power grid operation mode are changed so as to realize the harmonic hazard early warning of the user. The interval harmonic current statistical value of the user is measured by the harmonic monitoring device, so that the interval autoregression model of the user is constructed, the upper limit and the lower limit of the interval harmonic current injected into the system by the user in the future are predicted, the harmonic hazard of the user is evaluated according to the predicted interval harmonic current, and the harmonic hazard early warning of the user is realized. Therefore, the harmonic current of the user can be predicted, the future harmonic hazard of the user can be pre-judged, the limitation that the current power grid evaluates the harmonic pollution of the user only according to the operation condition of the current power grid without considering the change of future user parameters and system operation modesis overcome, and the method has relatively high engineering practicability and popularization and application values.

Description

technical field [0001] The invention relates to the technical field of harmonic monitoring, and more specifically, relates to a user harmonic hazard early warning and evaluation method based on interval monitoring data. Background technique [0002] In recent years, the grid connection of harmonic users has brought serious harmonic pollution to the power grid, which has greatly affected the safe and economical operation of the power grid and users. In order to realize harmonic monitoring, the prior art provides harmonic monitoring algorithms and devices, which basically realize automation, and a large number of networked monitoring systems have been applied in engineering. [0003] Common harmonic monitoring mainly provides supervision services for power grid companies, and provides qualitative judgment basis for users to access. However, the power company can only maintain the operation of the power grid by controlling users who exceed the standard, but cannot guide users ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G06F17/18G06F17/11G06Q10/04G06Q10/06G06Q50/06
CPCG06F17/18G06F17/11G06Q10/04G06Q10/0639G06Q50/06Y02E40/40
Inventor吴国昌邵振国张嫣陈晶腾郑文迪肖颂勇关明锋
OwnerSTATE GRID PUTIAN ELECTRIC POWER SUPPLY