Screening Method for Setting Parameters of Power System Stabilizer
A technology of power system and screening method, which is applied in the direction of circuit device, AC network circuit, reducing/preventing power oscillation, etc., and can solve problems such as inability to choose
Active Publication Date: 2020-06-16
云南电力试验研究院(集团)有限公司
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[0006] The present invention provides a screening method for setting parameters of a power system stabilizer to solve the problem in the prior art that the appropriate PSS parameters cannot be selected according to the actual application of the power system stabilizer and the low frequency band concerned by the power system
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[0028] Please refer to the attached figure 1 , with figure 1 A schematic flowchart of a method for screening setting parameters of a power system stabilizer provided by an embodiment of the present invention is shown.
[0029] attached by figure 1 It is known that the screening method for the setting parameters of the power system stabilizer provided by the embodiment of the present invention includes:
[0030] S01: Set parameters of a power system stabilizer, where there are at least two parameters of the power system stabilizer.
[0031] According to the structure of the actual power system stabilizer in the field, different PSS models are selected respectively. Among them, the commonly used models are PSS-2B model and PSS-1A model, please refer to the attached figure 2 , 3 . The PSS parameters are set according to the selected PSS model, wherein the PSS parameters may be commonly used parameters or optimized parameters of the commonly used parameters. In order to se...
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The invention provides a screening method for setting parameters of an electric system stabilizer. The method comprises the steps that according to the transfer function of the electric system stabilizer, the amplitudes and phase positions of all frequency points in the PSS working frequency band range are calculated, and then amplitude characteristic parameters and phase frequency characteristicparameters of all the frequency points are obtained. The amplitude characteristic parameters are subjected to vector decomposition according to the phase frequency characteristic parameters, and a power angle axial component and an angle speed axial component which is defined as a comprehensive gain coefficient K are obtained. According to each set of PSS parameters, the corresponding comprehensive gain coefficient K and the frequency, a frequency-comprehensive gain coefficient K relational graph under each PSS parameter is drawn. According to the drawn frequency-comprehensive gain coefficientK relational graph and the vibration frequency which is concerned by an electric system, an optimal parameter of the electric system stabilizer is selected. According to the screening method, advantages and disadvantages of the parameters of each set of the electric system stabilizer can be comprehensively evaluated in field actual application, and required setting parameters are quickly selectedby combining actual requirements of the electric system.
Description
technical field [0001] The invention relates to the technical field of power systems, in particular to a screening method for setting parameters of a power system stabilizer. Background technique [0002] In the early stage of power system networking, the synchronous generators are closely connected, the damping winding can generate sufficient damping, and low-frequency oscillation rarely occurs. However, with the expansion of the scale of grid interconnection, the widespread adoption of high-magnification fast excitation technology, and the operation of the grid under the influence of economical and environmental factors is closer to the stability limit, low-frequency oscillations have been observed in many power grids around the world, and The low-frequency oscillation problem of the power grid system is becoming more and more prominent. [0003] In order to solve the low-frequency oscillation problem of the power grid system, a power system stabilizer (English full name:...
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IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20
Inventor 吴水军周鑫杨蕾李海李胜男陈晶万雄彪
Owner 云南电力试验研究院(集团)有限公司