Transformer electromagnetic transient simulation modeling method based on PSCAD/EMTDC (power system computer aided design/ electromagnetic transients including DC) software
An electromagnetic transient simulation and modeling method technology, applied in the direction of instruments, electrical digital data processing, special data processing applications, etc., can solve the problems of current transformer iron core saturation, unbalanced transient current, misoperation, etc., and achieve popularization Easy to use, convenient model parameters, easy to obtain the effect of model parameters
Inactive Publication Date: 2015-12-30
SOUTH CHINA UNIV OF TECH +1
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[0005] In addition, the existence of inrush current, because it contains a large number of non-periodic components and high-order harmonic components, will reduce the power supply quality of the power system, an
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[0072] The present invention will be further described below in conjunction with specific examples.
[0073] The transformer electromagnetic transient simulation modeling method based on PSCAD / EMTDC software described in this embodiment, considering that in the ATP-EMTP electromagnetic transient simulation software, the nonlinear inductance element Type96 type that describes the hysteresis characteristics of the iron core ferromagnetic material is used. and the BCTRAN model jointly establish a transformer model considering hysteresis characteristics. Based on this idea, a nonlinear inductance element considering hysteresis characteristics is separately established in PSCAD / EMTDC, and then combined with the transformer model to establish a magnetic The PSCAD / EMTDC transformer simulation model of hysteresis characteristic; It comprises the following steps:
[0074] 1) Create a control model of variable inductance element in the Graphic window of PSCAD / EMTDC software, such as F...
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The invention discloses a transformer electromagnetic transient simulation modeling method based on PSCAD/EMTDC (power system computer aided design/ electromagnetic transients including DC) software. The method comprises the following steps of (1) creating a variable inductance element control model in a Graphic window of PSCAD/EMTDC; (2) creating a user parameter input interface in a Parameters window; (3) respectively compiling data preprocessing codes, hysteresis main loop cluster fitting codes and hysteresis sub loop cluster fitting codes in Computer and DSDYN segments of a Script window, and outputting an inductance value for controlling the variable inductance element; (4) building a nonlinear inductance element test model for describing hysteresis characteristics of ferromagnetic materials in a main window, building a model with the same system parameters in ATP-EMTP (alternative transients program-electromagnetic transients program) software, and performing simulation and result comparison; (5) connecting a nonlinear inductance element to the high-voltage side of a UMEC (unified magnetic equivalent circuit) transformer model in parallel in the main window, forming a transformer electromagnetic transient simulation model considering the hysteresis characteristics, and performing simulation result comparison in a manner like that in the step 4. The transformer electromagnetic transient simulation modeling method overcomes the defect that a transformer only considers saturation characteristics but does not consider the hysteresis characteristics in the PSCAD/EMTDC.
Description
technical field [0001] The invention relates to the technical field of transformer electromagnetic transient simulation modeling, in particular to a transformer electromagnetic transient simulation modeling method based on PSCAD / EMTDC software. Background technique [0002] my country's energy resources are mainly distributed in the west, while load centers are mainly concentrated in the east. This imbalance increases the demand for long-distance power transmission and grid interconnection, and requires optimal allocation of energy resources in a wide range. UHV DC transmission has the advantages of long distance, large capacity, low loss, saving land resources, flexible control, and convenient scheduling. one of the most effective ways. [0003] As the connection hub of the AC-DC system, the converter station gathers all kinds of equipment required for the conversion, and the converter transformer is the core equipment in the converter station, and its reliability and avai...
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Inventor 李晓华吴嘉琪丁晓兵田庆朱韬析吴立珠张冬怡
Owner SOUTH CHINA UNIV OF TECH
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