A structure improvement and parameter configuration method of a power system stabilizer pss4b

A parameter configuration method and structure improvement technology, applied in the field of power system, can solve the problems of complex structure, difficult parameter setting, and the influence of phase compensation between branches.

Inactive Publication Date: 2019-04-09
SOUTHWEST JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the complex structure of the existing PSS4B, and the mutual influence of phase compensation between branches, which leads to the difficulty of parameter setting

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  • A structure improvement and parameter configuration method of a power system stabilizer pss4b

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Embodiment Construction

[0062] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0063] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0064] PSS4B transfer function graph before improvement PSS4B has two inputs Δx 1 and Δx 2, You can directly use the rotor speed deviation as the two input signals, and then pass through the low frequency and high frequency converters respectively as the input of PSS4B. Due to the large number of PSS4B parameters, it is more complicated to study, and the compensation angles of each branch are likely to affect each other, making it difficult to set.

[0065] In the present invention,...

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Abstract

The invention discloses a structure improvement and parameter configuration method of a power system stabilizer PSS4B, which solves the problem that PSS4B is difficult to adjust due to its complex structure and easy mutual influence of parameters, and proposes a structure-improved PSS4B; Basically, in order not to cause phase compensation interactions between branches, the phase compensation link of each branch is set to be the same; and on the basis of the improved structure, the parameter setting method of the improved PSS4B phase compensation link is given; the included structure is listed The state matrix of the PSS4B single-machine infinite system is improved, and the damping ratio in the oscillation mode shows that the improved PSS4B has a better suppression effect on low-frequency oscillation than that under the classical parameters.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a structure improvement and parameter configuration method of a power system stabilizer PSS4B. Background technique [0002] While improving the economy of power generation and transmission, grid interconnection also brings other problems to the stability of the grid. When the generator is under heavy load, long-distance power transmission, and the fast excitation system is used for excitation, the total damping of the system is small or even negative, and the problem of low-frequency power oscillation is very easy to occur at this time. Low-frequency power oscillations have a major impact on system stability, and in severe cases, it may even lead to system breakdown, causing serious damage to the economy. Due to its excellent suppression effect on low-frequency power oscillations, relatively cheap manufacturing cost, and simple structure, PSS has become a rela...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24
CPCH02J3/24
Inventor 王德林刘英超李向东隗霖捷胡一鸣康积涛
Owner SOUTHWEST JIAOTONG UNIV
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