Method for decomposing non-invasive electric power load
A non-intrusive, power load technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as insufficient data and inability to measure and monitor power, and achieve the effect of improving time domain resolution
Active Publication Date: 2019-06-21
STATE GRID CORP OF CHINA +2
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Problems solved by technology
However, the data in this literature is not perfect in power supervision, and it cannot effectively monitor power metering in real time and online.
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[0039] Such as figure 1 As shown, a method for decomposing a non-intrusive electrical load includes the following steps:
[0040] Step 1: Collect and input the power consumption data of standard industrial users to obtain the waveform diagram of the power load signal of industrial users;
[0041] Such as figure 2 As shown, taking a steel industry as an example to carry out non-intrusive load decomposition, through the collection and input of relevant instrument data of the steel company, the power load data of the company from March to September are obtained, and the sampling period is 5 minutes. figure 2 The middle abscissa represents the number of sampling points, and the ordinate represents the signal amplitude.
[0042] Step 2: Carry out wavelet packet decomposition on the electrical load signal waveform diagram of industrial users, filter out high-frequency signals of industrial electrical loads, and retain low-frequency signals;
[0043] Wherein: step 2 comprises th...
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The invention discloses a method for decomposing a non-invasive electric power load, and belongs to the technical field of electric power load monitoring. The method for decomposing the non-invasive electric power load comprises the steps of 1, collecting and inputting power consumption data of a standard industrial user, thereby obtaining an electric load signal waveform diagram of the industrialuser; 2, carrying out wavelet packet decomposition on the electric load signal waveform diagram of the industrial user; and 3, carrying out frequency spectrum conversion and decomposition on a low-frequency signal by fast Fourier transform. According to the method for decomposing the non-invasive electric power load, the wavelet packet decomposition (WPD) is combined with the fast Fourier transform (FFT) to carry out signal decomposition and frequency spectrum conversion on load information of the industrial user so as to obtain operation conditions and cycles of production processes of the industrial user; and relevant production capacity and yield are calculated in combination with the kilowatt-hour production capacity of the processes.
Description
technical field [0001] The invention relates to the technical field of power load monitoring, in particular to a method for decomposing non-intrusive power loads. Background technique [0002] For the power system, power load monitoring is of great significance. It is not only conducive to improving the load composition, guiding users to consume reasonably, reducing electricity costs, but also conducive to the optimal allocation of national power resources. The power load decomposition data can enable power users to have a more detailed understanding of the power consumption of various electrical equipment in different periods, help them formulate reasonable energy-saving plans, adjust the use of electrical equipment, and purchase energy-saving equipment in a targeted manner, so that Under the premise of not affecting their normal production and life, power users can reduce power consumption and electricity expenses. The power load decomposition data also helps the power co...
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IPC IPC(8): H02J3/00
Inventor 李文峰白宏坤郑雅楠卜飞飞华远鹏韩丁王圆圆杨用春
Owner STATE GRID CORP OF CHINA