电力系统自动化
電力繫統自動化
전력계통자동화
AUTOMATION OF ELECTRIC POWER SYSTEMS
2013年
22期
73-78
,共6页
梁永亮%李可军%牛林%赵建国%任敬国%李昕伟
樑永亮%李可軍%牛林%趙建國%任敬國%李昕偉
량영량%리가군%우림%조건국%임경국%리흔위
最优权重%物元理论%云模型%证据理论%状态评估%不确定性
最優權重%物元理論%雲模型%證據理論%狀態評估%不確定性
최우권중%물원이론%운모형%증거이론%상태평고%불학정성
optimal weight%matter-element theory%cloud model%evidence theory%condition assessment%uncertainty
综合考虑变压器状态评估中存在的模糊性和随机性等不确定性问题,建立了变压器多层次状态评估模型。首先构建了变压器状态评估的指标体系以及等级划分标准,并将状态评估分为整体、系统和子系统3个阶段;其次根据物元云模型得到定量评价指标的等级关联度,结合最优权重获得定量评价系统中各子系统的状态评价结果;最后对原始证据进行随机处理和贝叶斯近似,基于D-S证据理论对各子系统与各系统的评价结果进行融合,得到整体的状态评价结果。实例证明该方法行之有效,为电力变压器的状态评估提供了一种新的思路。
綜閤攷慮變壓器狀態評估中存在的模糊性和隨機性等不確定性問題,建立瞭變壓器多層次狀態評估模型。首先構建瞭變壓器狀態評估的指標體繫以及等級劃分標準,併將狀態評估分為整體、繫統和子繫統3箇階段;其次根據物元雲模型得到定量評價指標的等級關聯度,結閤最優權重穫得定量評價繫統中各子繫統的狀態評價結果;最後對原始證據進行隨機處理和貝葉斯近似,基于D-S證據理論對各子繫統與各繫統的評價結果進行融閤,得到整體的狀態評價結果。實例證明該方法行之有效,為電力變壓器的狀態評估提供瞭一種新的思路。
종합고필변압기상태평고중존재적모호성화수궤성등불학정성문제,건립료변압기다층차상태평고모형。수선구건료변압기상태평고적지표체계이급등급화분표준,병장상태평고분위정체、계통화자계통3개계단;기차근거물원운모형득도정량평개지표적등급관련도,결합최우권중획득정량평개계통중각자계통적상태평개결과;최후대원시증거진행수궤처리화패협사근사,기우D-S증거이론대각자계통여각계통적평개결과진행융합,득도정체적상태평개결과。실예증명해방법행지유효,위전력변압기적상태평고제공료일충신적사로。
A multilayer transformer condition assessment model is built by taking both fuzziness and randomness in uncertainty into consideration.The framework of assessment is divided into three layers of subsystem assessment,system assessment and overall assessment,respectively.In the first layer of subsystem assessment,the relationship between quantitative index relative deterioration degrees and grades is expressed in the normal cloud model.Then the matter-element cloud model provides the association degrees between the quantitative indices and grades. By referring to the optimal weights,the condition assessment results of all subsystems in the quantitative assessment system are obtained.Finally random processing and Bayesian approximation of the original evidence is performed.The integral assessment results are obtained by merging the assessment results of the subsystems and systems based on the D-S evidence theory.The feasibility of the model proposed is verified through field test data,providing transformer condition assessment with a new line of thought.