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Wide area measurement-based PSS4B parameter adjusting and adapting method

A wide-area measurement and adaptation method technology, applied in AC network circuits, circuit devices, reducing/preventing power oscillations, etc., can solve problems such as poor adaptability to power grid operation scale and difficulty in setting PSS4B parameters.

Inactive Publication Date: 2017-12-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +3
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Problems solved by technology

[0004] In order to solve the problem that the PSS4B parameter setting is difficult and the adaptability to the grid operation scale is not strong, the present invention proposes a PSS4B parameter adjustment and adaptation method based on wide-area measurement

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  • Wide area measurement-based PSS4B parameter adjusting and adapting method

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[0033] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific examples.

[0034] The invention proposes a PSS4B parameter adjustment and adaptation method based on wide-area measurement, which solves the problems that the PSS4B parameter adjustment is difficult and the adaptability to the grid operation scale is not strong.

[0035] The advantages of PSS4B are more obvious. Since there are three branches, the gain can be adjusted in the high, middle and low frequency bands respectively. Each section is composed of a center frequency filter, and the mutual influence is small. At the same time, by setting the lead-lag compensation link in each frequency band, Adjust the angle accordingly to meet the requirements of various modes of oscillation damping. If the system scale changes, the current PSS4B parameters will have a poor effect on the system damping compensation, and the PSS4B par...

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Abstract

The present invention discloses a wide area measurement-based PSS4B parameter adjusting and adapting method. The method comprises the steps of 1 obtaining the real-time operation parameters of a power grid based on a wide area measurement technology, analyzing the power grid to measure the online uncompensated frequency response characteristics of the excitation systems, comparing and determining that a power system stabilizer (PSS) needs to compensate the phase difference; 2 aiming at the excitation systems having the larger uncompensated frequency response characteristic difference, and according to the data of the current system, adopting an SCE-UA algorithm to set the partial parameter of a PSS4B of an important generator set, thereby compensating the phase of the system. The method of the present invention mainly solves the problem that a PSS4B constant value model is insufficient in adaptability to different power grid scales, adopts the SCE-UA algorithm to set the PSS4B parameter of the important generator set by considering that the PSS4B model is many in model parameters and is not easy to adjust, and enables the system damping to be improved all in the high middle and low frequencies as much as possible, thereby adapting the frequency response characteristic of the current excitation system.

Description

technical field [0001] The invention belongs to the field of power systems, in particular to a PSS4B parameter adjustment and adaptation method based on wide-area measurement. Background technique [0002] In the 1960s, the United States caused system failures due to line tripping caused by low-frequency oscillations of tie lines. In 1969, the negative feedback of power was increased in the excitation system to improve the damping of the power system, which was called the power system stabilizer (PSS). This symbol With the formal proposal of PSS and its vigorous promotion and use, this is the first country to clearly propose PSS so far. In 2000, in order to solve the problem of ultra-low frequency oscillation, the concept of a new PSS model was proposed in Canada, which was later included in the IEEE 421.5 version revised by the Excitation Subcommittee of the Institute of Electrical and Electronics Engineers and named PSS4B. The advantages of PSS4B are obvious. Since there ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20
Inventor 齐郑庄舒仪张红颖王官宏李莹李文峰赵红生
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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