Method and device for analysing the quality of the electrical energy in a three-phase electric network
AssigneeSchneider Electric Industries SAS
InventorsBenoit Leprettre, Octavian Craciun, Seddik Bacha, Pierre Granjon, Daniel Radu
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Abstract
A method for analyzing quality of electrical energy in a three-phase electric network, the method including: measuring a set of electrical magnitudes, the set including one electrical magnitude per phase; forming a space vector from an instantaneous three-dimensional transformation of the set of measured electrical magnitudes; and determining a set including at least one parameter representative of the quality of the electrical energy in the three-phase electric network, according to the space vector.
Claims17
A method for analyzing quality of electrical energy in a three-phase electric power system to determine absence or presence of disturbance in the three-phase electric power system, the method comprising:
- measuring a set of electrical quantities, the set including one electrical quantity per phase;
- generating, by processing circuitry of an analyzing device, a space vector, which is a time-dependent complex number, from an instantaneous three-dimensional transformation of the set of measured electrical quantities, the space vector being generated over a sliding window;
- and
- determining, by the processing circuitry, according to the generated space vector, a set including at least one parameter representative of the quality of the electrical energy in the three-phase electric power system to determine the absence or the presence of disturbance in the three-phase electric power system, the at least one parameter including a parameter representative of voltage flicker.
A device for analyzing quality of electrical energy in a three-phase electric power system, the device comprising:
- processing circuitry configured to
- measure a set of electrical quantities, the set including one electrical quantity per phase,
- generate a space vector, which is a time-dependent complex number, from an instantaneous three-dimensional transformation of the set of measured electrical quantities, the space vector being generated over a sliding window, and
- determine, according to the generated space vector, a set including at least one parameter representative of the quality of the electrical energy in the three-phase electric power system, the at least one parameter including a parameter representative of voltage flicker.
A non-transitory recording medium including computer executable instructions, wherein the instructions, when executed by a computer, cause the computer to perform a method for analyzing quality of electrical energy in a three-phase electric power system to determine absence or presence of disturbance in the three-phase electric power system, the method comprising:
- measuring a set of electrical quantities, the set including one electrical quantity per phase;
- generating a space vector, which is a time-dependent complex number, from an instantaneous three-dimensional transformation of the set of measured electrical quantities, the space vector being generated over a sliding window;
- and
- determining, according to the generated space vector, a set including at least one parameter representative of the quality of the electrical energy in the three-phase electric power system to determine the absence or the presence of disturbance in the three-phase electric power system, the at least one parameter including a parameter representative of voltage flicker.
Dependencies are inferred from the claim text.