Harmonic source positioning method, device and equipment of power supply system and storage medium
A technology of power supply system and power supply equipment, which is applied in the direction of measuring device, fault location, measuring electricity, etc., can solve problems such as insufficient accuracy, instability, and inability to locate harmonic sources, so as to improve accuracy, avoid phase angle differences, accurate positioning
Pending Publication Date: 2021-10-08
HANGZHOU DECHENG ELECTRIC POWER TECH
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Problems solved by technology
[0004] However, in related technologies, the power-based harmonic location method is greatly affected by the phase angle difference between the two ends. When the voltage difference between the two sides of the common point is 90°, this method will fail
However, the harmonic locating method based on harmonic impedance is measured under the condition of system disturbance. In practice, the disturbance of the power grid is random and very unstable. Therefore, the two algorithms cannot be very accurate in some cases. The positioning of the harmonic source is good, but the positioning of the harmonic source is not stable enough, and is affected by the phase angle difference, so the accuracy is not high enough
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[0045] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.
[0046] The harmonic source location method provided in the embodiment of the present application is applied to a power supply system to locate the harmonic source of the power supply system. The power supply system includes: power supply equipment and multiple power loads, the power supply equipment is electrically connected to multiple power loads through multiple common connection points, so as to supply power to multiple power loads, and each power load is connected in parallel with a Smart capacitors.
[0047] For ease of understanding, ...
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The embodiment of the invention provides a harmonic source positioning method and device of a power supply system, equipment and a storage medium, and relates to the technical field of power transmission, and the harmonic source positioning method of the power supply system comprises the steps: obtaining a first harmonic voltage and a first harmonic current of a common connection point when an intelligent capacitor quits operation; acquiring a second harmonic voltage and a second harmonic current of the common connection point when the intelligent capacitor is put into operation; according to the first harmonic voltage, the first harmonic current, the second harmonic voltage, the second harmonic current and an impedance value of the intelligent capacitor, calculating a harmonic voltage generated by the user load side harmonic; and positioning the harmonic source according to the harmonic voltage and the first harmonic voltage, and therefore, by means of the method, it is guaranteed that when the harmonic source is positioned, the harmonic source is not affected by the phase angle difference of the two ends, the harmonic source is positioned more accurately, the stability of harmonic source positioning is guaranteed, and the accuracy of harmonic source positioning is improved.
Description
technical field [0001] The present invention relates to the technical field of power transmission, in particular to a harmonic source location method, device, equipment and storage medium for a power supply system. Background technique [0002] With the advancement of industrialization, industrial equipment has higher and higher requirements for power quality, so that both the power supply side and the power consumer begin to pay attention to the power quality of the distribution network. Harmonics are an important indicator of power quality. In order to improve power quality The harmonic content of the distribution network must be effectively controlled, but because the generation of harmonics is bidirectional, the use of power electronic equipment by the power supply side in the process of power transmission and distribution will generate harmonics that enter the grid, and the use of nonlinear loads by the power consumer will also generate Harmonics affect the power qualit...
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IPC IPC(8): G01R31/08G01R23/16
CPCG01R31/088G01R31/086G01R23/16
Inventor 黄海宇王莉马庆华李帮家李阳春王伟胜王文涛
Owner HANGZHOU DECHENG ELECTRIC POWER TECH