电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2015年
14期
63-69
,共7页
风力发电机组%可靠性%故障树分析%动态分辨系数%加权灰关联度
風力髮電機組%可靠性%故障樹分析%動態分辨繫數%加權灰關聯度
풍력발전궤조%가고성%고장수분석%동태분변계수%가권회관련도
wind turbine%reliability%fault tree analysis%dynamic identification coefficient%weighted degree of grey incidence
风电机组的可靠性评估可以为机组的可靠运行奠定基础.以风力发电机组液压系统为例,运用故障树分析法,并针对系统的灰色性及复杂性,提出利用改进灰关联分析法融合故障树的可靠性分析方法.该方法针对人为设置分辨系数使结果趋于平均化的不足,采用动态分辨系数确定原则,有效扩大了关联度分布区间.同时,为了更加符合实际工程需要,引入关联熵作为权重系数.通过对各种故障模式的重要度进行排序,找出系统的薄弱环节,为预防事故的发生,提高系统的可靠性提供理论依据.
風電機組的可靠性評估可以為機組的可靠運行奠定基礎.以風力髮電機組液壓繫統為例,運用故障樹分析法,併針對繫統的灰色性及複雜性,提齣利用改進灰關聯分析法融閤故障樹的可靠性分析方法.該方法針對人為設置分辨繫數使結果趨于平均化的不足,採用動態分辨繫數確定原則,有效擴大瞭關聯度分佈區間.同時,為瞭更加符閤實際工程需要,引入關聯熵作為權重繫數.通過對各種故障模式的重要度進行排序,找齣繫統的薄弱環節,為預防事故的髮生,提高繫統的可靠性提供理論依據.
풍전궤조적가고성평고가이위궤조적가고운행전정기출.이풍력발전궤조액압계통위례,운용고장수분석법,병침대계통적회색성급복잡성,제출이용개진회관련분석법융합고장수적가고성분석방법.해방법침대인위설치분변계수사결과추우평균화적불족,채용동태분변계수학정원칙,유효확대료관련도분포구간.동시,위료경가부합실제공정수요,인입관련적작위권중계수.통과대각충고장모식적중요도진행배서,조출계통적박약배절,위예방사고적발생,제고계통적가고성제공이론의거.
Reliability assessment of wind turbines can lay a foundation for its reliable operation. Using hydraulic system of wind turbine as an example, according to the system's grey and complexity, a novel method is proposed by introducing the grey correlation analysis method into the fault tree analysis. This method adopts the dynamic identification coefficient principle instead of artificial setting 0.5, which expands the correlation distribution interval effectively. Also, factor weight coefficient is introduced to suffice the need of project. Application of this method shows that the importance of failure modes can be sorted and the weak link can be found. The results can be the theoretical basis of preventing accident and improving system reliability.
