A Parameter Acquisition Method of Equivalent Circuit Model of Saturated Reactor

Abstract

The invention provides a method for acquiring parameters of an equivalent circuit model of a saturation reactor. The model comprises a non-linear inductor Lcore, an air core inductor Lair and a coil DC resistor Rcu which are in series connection. The non-linear inductor Lcore is in parallel connection with a non-linear resistor Re. The method comprises following steps: (1) calculating the non-linear inductance Lcore through a controlled current source equivalent method; (2) calculating the non-linear resistance Re through an impulse discharge test; and (3) calculating the air core inductance Lair through a linear inductance equivalent method. Compared with the prior art, the method for acquiring the parameters of the equivalent circuit model of the saturation reactor has advantages that the parameters of the equivalent circuit model of the saturation reactor are acquired based on the impulse discharge test, so that the electric performance of the saturation reactor can be more accurately simulated.

Description

technical field [0001] The invention relates to a parameter acquisition method, in particular to a parameter acquisition method of a saturated reactor equivalent circuit model. Background technique [0002] Under the action of impulse voltage and power frequency voltage, the electrical characteristics of the magnetic core material of the saturable reactor for HVDC converter valve are obviously different. The current research on saturable reactors generally uses the power frequency characteristics of the saturated reactor to construct the equivalent circuit model of the saturable reactor. However, the equivalent circuit model obtained in this way cannot accurately simulate the electrical performance of the saturable reactor. At the same time, it is difficult to measure the electrical characteristics of the saturated reactor in the working state in actual working conditions. Since the voltage / current characteristics of the saturated reactor in the impulse discharge test are ba...

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Problems solved by technology

The current research on saturable reactors generally uses the power frequency characteristics of the saturable reactor to construct the equivalent circuit model of the saturable reactor. However, the equivalent circuit model obtained in this way cannot accurately simulate the electrical performance of the saturable reactor.

At the same time, it is difficult to measure the electrical characteristics of the saturated reactor in the working state in actual working conditions. Since the voltage / current characteristics of the saturated reactor in the impulse discharge test are basically the same as the electrical characteristics during operation, high-voltage discharge The test has increasingly become an important means to check whether the saturable reactor is qualified

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