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Harmonic traceability method based on dynamic planning time sequence similarity algorithm

A technology of time series and harmonic traceability, applied in computing, computer components, instruments, etc., can solve problems such as inaccurate harmonic traceability and responsibility allocation, cumbersome traceability methods, etc.

Active Publication Date: 2021-09-24
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY +1
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  • Description
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  • Application Information

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Problems solved by technology

[0003] However, most of the existing methods are based on short-term measured instantaneous data, but harmonics are long-term steady-state quantities. Harmonic traceability and responsibility allocation through short-term instantaneous data measurement are not accurate enough, and the existing traceability methods are relatively cumbersome.

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  • Harmonic traceability method based on dynamic planning time sequence similarity algorithm
  • Harmonic traceability method based on dynamic planning time sequence similarity algorithm

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0029] In describing the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", " The orientation or positional relationship indicated by "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, so as to Specific orientation configurations and operations, therefore, are not to be construed as limitations on the invention.

[0030] refer to Figure ...

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Abstract

The invention belongs to the technical field of electric power, and particularly relates to a harmonic traceability method based on a dynamic planning time sequence similarity algorithm, which aims at the problem of poor accuracy, and comprises the following steps: S1, extracting all harmonic data at a certain time of a certain day and at the time of each day in a system; s2, extracting electricity consumption in the same time period of the day and all unit time of the time every day in the system; s3, processing all harmonic data and electricity consumption per unit time in a certain time of a certain day to form a change curve; s4, performing weighted average on all harmonic data and electricity consumption per unit time in a certain time every day to form a change curve; s5, subtracting the data of a certain day from the weighted average of the harmonic data and the power consumption per unit time to obtain an absolute value, and then solving an average value; and S6, calculating and solving by using a sequence similarity algorithm, and carrying out harmonic traceability according to a calculated value. The harmonic data is monitored and judged more comprehensively and accurately, and the judgment method is simple, convenient and effective.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a harmonic source tracing method based on a dynamic programming time series similarity algorithm. Background technique [0002] More and more power electronic loads are connected to the power grid, making the harmonics in the power grid more complicated, affecting the normal operation of the load, and even causing damage to power equipment or causing power outages in severe cases. In an actual power system, a busbar is often connected to multiple users that emit harmonics. The harmonics among these users affect each other. How to accurately locate the source of harmonics based on existing data is the basis for quantitative division of harmonic responsibilities and effective control of harmonics. , to ensure the safe and efficient operation of the power grid and users. At present, there are two methods of harmonic traceability: harmonic power direction method and responsi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G01R23/16
CPCG01R23/16G06F18/22
Inventor 李宏强张爽任勇郭欣然
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
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