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Power grid power utilization safety control method based on user power utilization analysis

A technology of safety control and electrical analysis, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as power consumption control with few harmonics, and achieve the effect of ensuring safety

Inactive Publication Date: 2021-11-09
南通通明集团有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional control method mainly considers power, current and other working factors to safely control the user's power consumption, and rarely controls the harmonic power consumption.

Method used

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  • Power grid power utilization safety control method based on user power utilization analysis

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Embodiment Construction

[0021] Detailed Description of the present invention is described in detail with reference to the accompanying drawings.

[0022] like figure 1 As shown, the power supply safety control method of the present invention includes the following steps:

[0023] First, the user current signal, voltage signal, power, and extraction frequency signal are collected.

[0024] Second, perform information decomposition:

[0025] Convert the current signal I to I 0 For DC current components, h = 1, 2, 3, ..., n is the number of fundamental and harmonic times. Current vector for h harmonic, i h The current valid value of the H-harmonic wave, ω = 2πf is angular frequency;

[0026] Convert the voltage signal U to U 0 For DC voltage components, Voltage vector for h harmonic, u h Voltage valid value for H-harmonics.

[0027] Again, calculate the reactive current:

[0028] Calculate the admission of the load at each harmonic frequency G h Electronics in linear loads for harmonic voltages, JB h F...

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Abstract

The invention provides a power grid power utilization safety control method based on user power utilization analysis. The power grid power utilization safety control method comprises the following steps of (1) acquiring information, (2) extracting frequency, (3) converting the current, (4) converting the voltage, (5) calculating reactive current, (6) judging whether the reactive current is greater than a reference value, if so, giving an alarm when the reactive current is high, and executing the step (7), and if not, executing the step (7), (7) calculating harmonic current generated by a load harmonic source, (8) judging whether the harmonic current is greater than a reference value or not, if so, giving a high harmonic alarm, timing, and executing the step (9), if not, executing the step (11), (9) judging whether the timing time is greater than a reference value, if so, stopping power supply, and if not, executing the step (10), (10) continuing timing to the step (1), (11) judging whether the detection is continued or not, if so, returning to the step (1), and if not, ending. The invention provides a power grid power utilization safety control method based on user power utilization analysis. The power supply condition of a user can be safely controlled.

Description

Technical field [0001] The present invention belongs to the field of power detection control, and in particular, the electrical safety control method for power griding based on user electricity analysis. Background technique [0002] The distribution network is powered by various electric users, how to ensure that the security of users electricity is important for grid and users. The traditional control method mainly considers the power, current and other operating factors to safely control the user, very little control of harmonics. [0003] The present invention proposes a power safety control method based on the user's electrical analysis, calculating the harmonic current component of the user's electricity, determining whether the harmonic current is too high, and then control the user's power supply, and ensure the security of the grid. Inventive content [0004] The present invention provides an electric security control method for power grid based on user electricity anal...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/001H02J3/0012H02J2203/20
Inventor 季润阳
Owner 南通通明集团有限公司