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A Parameter Calculation Method of Double Winding Power Transformer

A power transformer and parameter calculation technology, which is applied in the measurement of electrical variables, instruments, and measurement of electricity, etc., can solve the problems of inaccurate estimation of transformer tap positions and large amount of calculation, and achieve fast calculation speed, small amount of calculation, and high computational cost. The effect of satisfying accuracy

Active Publication Date: 2017-11-24
上海华群实业股份有限公司 +1
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  • Description
  • Claims
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Problems solved by technology

Therefore, the existing transformer parameter estimation method has a large amount of calculation, and the estimation of the transformer tap position may be inaccurate

Method used

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  • A Parameter Calculation Method of Double Winding Power Transformer
  • A Parameter Calculation Method of Double Winding Power Transformer
  • A Parameter Calculation Method of Double Winding Power Transformer

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with accompanying drawing.

[0038] The parameter calculation method of the double-winding power transformer of the present invention adopts the method of traversing the tap position of the transformer, and the voltage (U 1 , U 2 ), active power (P 1 ,P 2 ) and reactive power (Q 1 , Q 2 ), calculate the various parameters in the transformer equivalent circuit (namely: the excitation reactance and ground conductance of the parallel branch in the transformer equivalent circuit, and the reactance and resistance of the series branch) and the actual value of the transformer tap Operating gear (corresponding to the actual operating ratio of the transformer).

[0039] see figure 2 , the parameter calculation method of the present invention specifically includes the following steps:

[0040] In step a, the rated voltages of the primary and secondary sides of the transformer are U 1N , U 2N , record t...

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Abstract

The invention discloses a method for calculating parameters of a duplex winding power transformer. A method for traversing transformer tap gears is adopted, through voltages on the primary side and the secondary side of the transformer in a short time window and on-line measured data of active power and reactive power, parameters of an equivalent circuit of the transformer and actual motion gears of the transformer tap are calculated. Through the use of the method, the iteration is not required in the calculating process; the method has the advantages that the operand is less, the calculating speed is high, and the calculation accuracy completely meets actual project requirements.

Description

technical field [0001] The invention relates to a method for calculating parameters of a transformer, in particular to a method for calculating parameters of a double-winding power transformer based on traversing the tap positions of the transformer. Background technique [0002] With the continuous improvement of the domestic power system automation level, the demand for advanced application software in the power system operation department is becoming more and more urgent. The realization of various functions of the advanced application software of the power system depends on the accuracy of the analysis and estimation of the topological relationship of the power system and the model parameters of the power equipment (that is, various parameters in the equivalent circuit). Power transformer is a large and indispensable important power equipment in power system. Its parameter estimation is very important. However, the existing power transformer parameter estimation methods ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 袁建文赵阳郑雪筠郑超张婧孙璐王少荣
Owner 上海华群实业股份有限公司
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