Impedance frequency eqmivalent value novel method for designing AC filter
An impedance frequency, equivalent method technology, applied in the value field, can solve the problem that the real situation of the system cannot be completely and accurately reflected, the generator, transformer, line resistance parameters are not considered, and the impedance frequency model is not considered.
Inactive Publication Date: 2008-10-08
国网直流工程建设有限公司
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Problems solved by technology
[0002] At present, the harmonic impedance equivalent work of cross-regional DC transmission projects does not consider the impedance frequency model of electrical components such as generators, transformers, lines, and input filter components of other nearby converter stations, nor does it consider generators, The resistance parameters of transformers and lines, therefore, the equivalent results cannot completely and accurately reflect the real situation of the system, and the impedance angle and impedance amplitude in the impedance sector diagram are large
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[0008] Establish the impedance frequency model of electrical components such as generators, transformers, and lines, and input filter element parameters of other nearby converter stations, and determine various parameters; add resistance parameters of generators, transformers, and lines, and take them according to the recommended reactance value percentage value; add the line skin effect coefficient to reflect the line parameters at high frequencies; partition the harmonic impedance sector diagram to reduce the impedance area.
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An impedance frequency equivalence new method for designing alternating current filter for establishing a generator, a transformer, lines or the like electric elements, impedance frequency models of filter element parameters plunged by neighbouring other converter station, but the parameters are simplied in power system routine calculation, each impedance frequency model are established based on diffferent characteristics of the nodes, the generator, the transformer, the lines, filters or the like electric elements, resistance parameters of the generator, the transformer and the lines are added for determining to be used for alternating current-direct current system operating mode of the harmonic impedance equivalence calculation and to perform statistical sectorization for the equivalence result by the harmonic impedance equivalence. The abstract figure is an impedance fan diagram performing harmonic impedance equivalence sectorization with the new method.
Description
technical field [0001] The invention relates to harmonic impedance equivalents for filter design of HVDC converter stations. Background technique [0002] At present, the harmonic impedance equivalent work of cross-regional DC transmission projects does not consider the impedance frequency model of electrical components such as generators, transformers, lines, and input filter components of other nearby converter stations, nor does it consider generators, The resistance parameters of transformers and lines, therefore, the equivalent results cannot fully and accurately reflect the real situation of the system, and the impedance angle and impedance amplitude in the impedance sector diagram are relatively large. [0003] The model parameters of each electrical component in the power system directly affect the harmonic impedance equivalent results, and the complete impedance frequency model can better reflect the high-frequency impedance change. Partitioning the impedance of ea...
Claims
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Login to View More IPC IPC(8): H02J3/01
CPCY02E40/40
Inventor 常浩殷威扬杨志栋李亚男刘宝宏樊纪超
Owner 国网直流工程建设有限公司
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