Non-invasive unitized current on-line measurement method of electric equipment

Abstract

The invention discloses a non-invasive unitized current on-line measurement method of electric equipment, which is used for conducting the decomposition and monitoring of load and power consumption, electricity consumption analysis, load and energy conservation, load prediction and load modeling for an electric system; the method comprises the following steps: information on voltage and current is monitored at the entrance of electrical load and whether the electric equipment is input, if not, monitoring continues; if so, the next step is conducted; steady voltage and current data of the electrical load before and after the input of the electric equipment are recorded; harmonic analysis is conducted to data recorded at the previous step to obtain a current expression; difference value of the steady current of the electrical load before and after the input of the electric equipment is calculated; and the difference value of the current calculated in the previous step is unitized to obtain parameters of unitized current of the electric equipment. Without influence on the regular production and life of power consumers, the method can obtain the parameters of the unitized current of the main internal electric equipment and is more beneficial to the implementation of non-invasive electrical load decomposition.

Description

technical field [0001] The invention relates to an online measurement method for electric equipment unit current. In particular, it relates to a non-intrusive on-line measurement method for electrical equipment unit current that can obtain the current parameters of main electrical equipment units inside the power user without affecting the normal production and life of the power user. Background technique [0002] The power load decomposition data is of great significance to the whole society (including power companies and power users) energy saving and power system planning and operation. [0003] The current parameters of electrical equipment units are the data basis of non-intrusive power load decomposition, and the acquisition of parameters is currently mainly done by offline statistics. Offline statistical methods are mainly suitable for laboratory research or power users with better independent measurement conditions. Laboratory research is to purchase some electrica...

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Problems solved by technology

Laboratory research is to purchase some electrical equipment in a targeted manner, and conduct a large number of measurements and statistics on it; however, due to the wide variety of electrical equipment, the laboratory cannot purchase all types of electrical equipment, if the user's measurement conditions allow It is also possible to conduct a large number of measurements and statistics on electrical equipment within the user

[0004] The off-line statistical method is undoubtedly a very scientific and accurate method to obtain the unit current parameters of electrical equipment, but due to the complexity and variety of power loads and the limitations of measurement conditions, it is impossible to carry out a large number of separate sampling statistics for each type of electrical equipment get its cell current

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