Harmonic hazard assessment method based on interval statistic value

A statistical value and harmonic technology, applied in the field of harmonic hazard assessment based on interval statistical value, can solve the problem of lack of ability to predict the user's harmonic hazard, etc.

Inactive Publication Date: 2020-03-27
STATE GRID PUTIAN ELECTRIC POWER SUPPLY +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the harmonic pollution of users is closely related to user parameters and grid operation mode. The harmonic monitoring data of the grid can only reflect the harmonic current injected by users under the influence of 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, and cannot predict the future harmonic hazard of the user

Method used

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  • Harmonic hazard assessment method based on interval statistic value
  • Harmonic hazard assessment method based on interval statistic value
  • Harmonic hazard assessment method based on interval statistic value

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Embodiment Construction

[0062] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0063] A harmonic hazard assessment method based on interval statistical values, characterized in that the harmonic monitoring device is set between the system and the user, used to record the harmonic current value injected by the user into the system, and generate the statistical value of the interval harmonic current ;

[0064] The calculation method of the harmonic current value is specifically: the harmonic monitoring device takes 3min or 10min as the unit time to record the maximum value, minimum value, average value, and 95% maximum value of the harmonic current of the 2nd to 25th order, and take the maximum value and The minimum value constitutes an interval to represent the range of harmonic current injected by users in this period, and the time-series statistical value X of the harmonic current composed of multiple periods is:

[006...

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Abstract

The invention provides a harmonic hazard assessment method based on an interval statistical value, and the method comprises the steps: setting a harmonic monitoring device between a system and a user,recording a harmonic current value injected into the system by the user, and generating the statistical value of the interval harmonic current; the harmonic current value calculation method specifically comprises the following steps: enabling the harmonic monitoring device to record the maximum value, the minimum value, the average value and the 95% maximum value of the harmonic current for 2-25times by taking 3min or 10min as unit time; and taking the maximum value and the minimum value to form an interval for representing the range of the harmonic current injected by the user in the time period, and taking a plurality of time periods to form a time sequence statistical value X of the interval harmonic current. By applying the technical scheme, the interval harmonic current injected into the system by the user in the future can be predicted, and a corresponding harmonic hazard evaluation method is provided, so that harmonic hazard early warning of the user is realized.

Description

technical field [0001] The invention relates to the field of power grid maintenance, in particular to a harmonic hazard assessment method based on interval statistical values. 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. At present, good research progress has been made in the development of harmonic monitoring algorithms and devices, especially with the advancement of hardware technology, signal processing technology and artificial intelligence technology, harmonic monitoring devices have basically realized automation, and a large number of networked monitoring systems It has been applied in engineering. Existing harmonic monitoring mainly provides supervision services for power grid companies, and provides qualitative judgment basis for users to access. However, the power company maintai...

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G06Q10/06G06Q50/06G06F17/18H02J3/00
CPCG06Q10/06315G06Q50/06G06F17/18H02J3/00
Inventor吴国昌邵振国张嫣陈晶腾郑文迪肖颂勇关明锋陈友恒林立乾
OwnerSTATE GRID PUTIAN ELECTRIC POWER SUPPLY