A method and device for calculating the output voltage and current of a phase-shifting transformer
A technology of phase-shifting transformer and output voltage, which is applied in the directions of calculation, measurement device, computer-aided design, etc., can solve the problems of power flow calculation and short-circuit current calculation of phase-shifting transformer, etc.
Active Publication Date: 2022-04-26
GUANGDONG POWER GRID CO LTD +1
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[0003] The purpose of the present invention is to provide a method and device for calculating the output voltage and current of a phase-shifting transformer, so as to solve the difficult problems of phase-shifting transformer power flow calculation and short-circuit current calculation
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[0051] The technical solution in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0052]It should be understood that the step numbers used herein are only for convenience of description, and are not intended to limit the order in which the steps are performed.
[0053] It should be understood that the terminology used in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended t...
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The invention discloses a method and device for calculating the output voltage and current of a phase-shifting transformer, comprising: establishing an equivalent model of the phase-shifting transformer according to the circuit structure parameters of the phase-shifting transformer; angle; according to the equivalent impedance and the phase-shifting angle to construct the external equivalent model of the phase-shifting transformer; input the preset input voltage, the preset input current, the equivalent impedance and the phase-shifting angle into the The external equivalent model of the phase-shifting transformer obtains the output voltage and output current of the phase-shifting transformer. The invention makes the input and output model equivalent of the phase-shifting transformer, and calculates the output voltage and current according to the input voltage and current of the phase-shifting transformer, thereby providing a basis for the power flow calculation and short-circuit current calculation of the line after the phase-shifting transformer is installed.
Description
technical field [0001] The invention relates to the technical field of electric power system relay protection, in particular to a method and device for calculating the output voltage and current of a phase-shifting transformer. Background technique [0002] The phase-shifting transformer is an important device to control the power flow of the power system. It uses the offset between the input and output of the transformer to control the phase angle of the output voltage and current, and then achieves the purpose of controlling the active power transmitted by the output line. The phase-shifting transformer (PST) consists of a series transformer and a parallel transformer. The secondary side (delta ring) of the series transformer (ST) and the secondary side of the parallel transformer (ET) are connected in three phases. Due to the complex structure of the phase-shifting transformer, its equivalent impedance The calculation method is completely different from conventional trans...
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IPC IPC(8): G06F30/3323G06F30/367G06F17/11G01R31/00
CPCG06F30/3323G06F30/367G06F17/11G01R31/00
Inventor 屠卿瑞刘玮陈桥平
Owner GUANGDONG POWER GRID CO LTD