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Calculation method of harmonic pollution liability applicable to power quality data exchange format

A data exchange format and power quality technology, applied in spectrum analysis/Fourier analysis, etc., to improve the management level of power quality and solve the problem of harmonic pollution

Inactive Publication Date: 2015-08-19
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0003] Aiming at the deficiency of calculating harmonic pollution liability based on the instantaneous value of voltage and current mentioned in the above background technology, the present invention proposes a calculation method of harmonic pollution liability suitable for power quality data exchange format

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  • Calculation method of harmonic pollution liability applicable to power quality data exchange format
  • Calculation method of harmonic pollution liability applicable to power quality data exchange format
  • Calculation method of harmonic pollution liability applicable to power quality data exchange format

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Embodiment Construction

[0030] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0031] Taking a certain busbar in a substation as an example, the nominal voltage of the busbar is 10kV, and the three-phase short-circuit capacity is 100MVA. The schematic diagram of the electrical connection at the busbar is as follows: figure 1 As shown, taking the 5th harmonic as an example, assuming that user D is the concerned harmonic source load, calculate the harmonic pollution responsibility of load D at bus X. Power quality monitoring instruments are installed at the monitoring points, and the data format is saved as a power quality data exchange format. The intercepted bus X harmonic voltage amplitude and branch harmonic current amplitude data between 0:00 and 1:00 in the evening are shown in Table 2. Tak...

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Abstract

The invention discloses a calculating method suitable for harmonic pollution responsibilities in a power quality data interchange format in the technical field of power. According to the technical scheme, the method comprises the following steps of: calculating system harmonic impedance according to nominal voltage of a power grid and three-phase shortcircuit capacity of a common coupling point; on this basis, calculating harmonic voltage effective value amplitude contributed by a concerned harmonic source to a bus at the common coupling point, and solving background harmonic voltage effective values contributed by rest harmonic sources except the concerned harmonic source at the common coupling point; further calculating an included angle cosine between the harmonic voltage effective value of the bus and the harmonic voltage effective value contributed by the concerned harmonic source; and finally, calculating the harmonic pollution responsibilities generated by the concerned harmonic source at the bus. The calculating method has the advantages that the harmonic pollution responsibilities of the harmonic source can be monitored every day on the basis of the conventional power quality monitoring system; and the calculating method has great significance for the further solving of the harmonic pollution problems and the improvement of the power quality management level.

Description

technical field [0001] The invention belongs to the design field of calculation methods for harmonic pollution responsibilities, and in particular relates to a calculation method for harmonic pollution responsibilities applicable to power quality data exchange formats. Background technique [0002] Regarding the harmonic pollution of the power system, my country's Electric Power Law stipulates: "Who pollutes, who governs." However, the current power system lacks a quantitative division of responsibilities for various harmonic pollution sources, and the status quo of unclear responsibilities has brought difficulties to harmonic governance. Harmonic voltage liability is a common indicator to measure harmonic pollution liability. The calculation methods of harmonic pollution liability at home and abroad can be divided into two categories: the method based on equivalent circuit simplification and the method based on data analysis. The equivalent circuit simplification method est...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R23/16
Inventor 华回春贾秀芳曹东升赵成勇
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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