Parameter setting method for leading phase adaptive type power system stabilizer

Abstract

The invention discloses a parameter setting method for a leading phase adaptive type power system stabilizer. In current projects, the conventional PSS (power system stabilizer) parameter setting method mostly adopts a phase correction method by taking an active power input ring as a compensation hysteresis characteristic principle. According to the parameter setting method disclosed by the invention, a leading phase adaptive type power system stabilizer model is adopted, and a corresponding relation between an input rotary speed signal and an active power signal is found by adopting a field test method, and by adopting a classical frequency domain calculation method, a leading phase angle calculation formula of a power-rotary speed axis synthesized vector is obtained; and the corresponding parameters can be set according to non-compensation characteristic of an actual unit through the phase angle calculation of the synthesized vector to enable a synthesized moment to be close to the rotary speed axis. The parameter setting method disclosed by the invention can be used for strengthening oscillation suppression capability of a frequently occurring low-frequency band of a super-huge type alternating current synchronous power grid, and the dynamic stability level of the low-frequency band of the super-huge type alternating current synchronous power grid is improved.

Description

technical field [0001] The invention relates to an on-site parameter setting method for a power system stabilizer, in particular to an on-site parameter setting method for an advanced phase self-adaptive power system stabilizer that uses the synthesis of power-speed variation as input. Background technique [0002] With the steady implementation of the "Thirteenth Five-Year Plan" of the State Grid Corporation of China, my country will form a complex super-large synchronous grid pattern with multiple voltage levels and AC-DC hybrid connections. The increase of the equivalent inertia of the whole network and the change of the start-up mode weaken the damping of the whole network, increase the risk of low-frequency oscillation, and reduce the dynamic stability of the system. [0003] At present, the most widely used method to prevent low-frequency oscillation of the system is the power system stabilizer PSS (Power System Stabilizer). Hysteresis characteristics to achieve the e...

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Problems solved by technology

However, in order to achieve the purpose of compensating the non-compensation characteristics of generators, the existing typical PSS models often use multi-order large phase lead links in parameter setting. This compensation method using large lead links will cause the PSS gain to be limited and serious Weaken its oscillation suppression ability in the middle and low frequency bands; on the other hand, for the non-compensated characteristics at different frequencies, it is necessary to use the same set of leading parameters to achieve the compensation effect of the whole frequency band, and there are problems such as difficulty in parameter setting, which is not conducive to engineering on-site parameter setting

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