these models have enough precision in subsynchronous oscillation ( sso ) problem analysis 這種模型對于分析次同步振蕩(sso)問題,具有足夠的精度。
in an ac system with multiple hvdc converters, turbine generators can interact adversely with all the converters through electrical connection, which makes the subsynchronous oscillation more complicated 并通過對含有多個直流換流站系統(tǒng)的電氣阻尼特性分析,驗證了該指標的有效性。
this simplification principle is the foundation of the following analysis . using the test signal method, a detailed analysis of subsynchronous oscillation for a hvdc system is performed (3)對一個僅含有直流輸電線路的系統(tǒng),采用復轉(zhuǎn)矩系數(shù)----測試信號法,對其次同步振蕩特性進行了分析。
from the viewpoint of electrical damping, this dissertation focus on the damping analysis of subsynchronous oscillation for different systems, such as hvdc system, hybrid ac / dc system and multiple-converter hvdc system 目前,直流輸電技術已經(jīng)在我國得到了廣泛的應用,并且在今后的幾十年中,直流輸電在我國還將有更為廣闊的應用前景。
torsional interaction exists between hvdc converters and turbine-generators, and negative electrical damping provided by hvdc may cause subsynchronous oscillation ( sso ) that can lead to turbine-generator shaft failure and electrical instability at oscillation frequencies lower than the fundamental system frequency 高壓直流輸電(high-voltage-direct-current----hvdc)系統(tǒng)與臨近同步發(fā)電機組之間存在著扭振相互作用,hvdc的電氣負阻尼作用有可能引起機組在次同步頻率范圍的扭轉(zhuǎn)振蕩。