第 51 卷 第 21 期 電力系統(tǒng)保護(hù)與控制 Vol.51 No.21
2023 年 11 月 1 日 Power System Protection and Control Nov. 1, 2023
DOI: 10.19783/j.cnki.pspc.230312
基于灰色關(guān)聯(lián)分析和聚類云模型的變壓器油紙絕緣狀態(tài)評(píng)估
鄒 陽(yáng) 1
,林錦茄 1
,李安娜 2
,張?jiān)葡?1
(1.福州大學(xué)電氣工程與自動(dòng)化學(xué)院,福建 福州 350108;2.國(guó)網(wǎng)福建省電力有限公司廈門供電公司,福建 廈門 361004)
摘要:電力變壓器復(fù)合油紙絕緣狀態(tài)的準(zhǔn)確診斷對(duì)電力系統(tǒng)安全穩(wěn)定運(yùn)行以及設(shè)備自身運(yùn)維具有重要指導(dǎo)意義。針
對(duì)油紙絕緣介電響應(yīng)少數(shù)特征量評(píng)估和未考慮系統(tǒng)隨機(jī)性導(dǎo)致評(píng)估不準(zhǔn)確的問(wèn)題,提出基于灰色關(guān)聯(lián)分析(grey
relational analysis, GRA)與聚類云模型的評(píng)估方法。首先,基于回復(fù)電壓法和擴(kuò)展德拜模型提取 5 個(gè)相關(guān)特征量,
建立油紙絕緣狀態(tài)評(píng)估體系。然后,針對(duì)多特征量在反映絕緣狀態(tài)的敏感性差異,采用組合賦權(quán)法綜合 GRA 和
改進(jìn)層次分析法,避免了數(shù)據(jù)信息丟失,使權(quán)重分配更加合理。最后,利用云模型霧化特性反映數(shù)據(jù)隨機(jī)性,全面
考慮評(píng)估指標(biāo)等級(jí)分類邊界的隨機(jī)性和模糊性后構(gòu)建了聚類云模型隸屬度選擇器。通過(guò)多臺(tái)不同糠醛含量變壓器
實(shí)測(cè)數(shù)據(jù)進(jìn)行驗(yàn)證表明,該評(píng)估方法不僅能夠準(zhǔn)確反映變壓器實(shí)際絕緣狀態(tài),而且能體現(xiàn)其劣化趨勢(shì),為檢修策
略的制定提供參考依據(jù)。
關(guān)鍵詞:油紙絕緣;時(shí)域響應(yīng);模糊綜合評(píng)估;聚類云模型;灰色關(guān)聯(lián)分析;改進(jìn)層次分析法
Evaluation of transformer oil-paper insulation status based on grey relational
analysis and a cluster cloud model
ZOU Yang1
, LIN Jinjia1
, LI Anna2
, ZHANG Yunxiao1
(1. College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China; 2. Xiamen Power
Supply Company, State Grid Fujian Electric Power Co., Ltd., Xiamen 361004, China)
Abstract: Accurate diagnosis of the composite oil-paper insulation state of power transformers is of great guiding
significance for the safe and stable operation of power systems and the operation and maintenance of equipment itself. In
this paper, an evaluation method based on grey relational analysis (GRA) and a clustering cloud model is proposed to
solve the problem of inaccurate evaluation caused by few characteristic quantities of the dielectric response of oil-paper
insulation and failure to consider the randomness of the system. First, based on the recovery voltage method and the
extended Debye model, five relevant features are extracted to establish the oil-paper insulation state evaluation system.
Second, in view of the sensitivity differences of multiple feature quantities in the reactive insulation state, a combination
weighting method combining GRA and an improved analytic hierarchy process is used to avoid data information loss and
make the weight allocation more reasonable. Finally, it uses the atomization characteristics of the cloud model to reflect
the randomness of the data, and comprehensively considers the randomness and fuzziness of the classification boundary
of the evaluation index grade. After that a clustering cloud model membership selector is constructed. The validation of
measured data from multiple transformers with different furfural content shows that the evaluation method can not only
accurately reflect the actual insulation status of the transformer, but also reflect its deterioration trend, providing a
reference basis for the formulation of maintenance strategies.
This work is supported by the Major Research Program Cultivation Project of the National Natural Science
Foundation of China (No. 92266110).
Key words: oil-paper insulation; time domain response; fuzzy comprehensive evaluation; cluster cloud model; grey
correlation analysis; improved analytic hierarchy process
0 引言
回復(fù)電壓法(return voltage measurement, RVM)
基金項(xiàng)目:國(guó)家自然科學(xué)基金重大研究計(jì)劃培育項(xiàng)目資助
(92266110);福建省自然科學(xué)基金項(xiàng)目資助(2019J01248)
是一種以時(shí)域介電響應(yīng)理論為基理的油紙絕緣系統(tǒng)
測(cè)量方法,簡(jiǎn)便無(wú)損且攜帶絕緣狀態(tài)信息豐富,已
被廣泛應(yīng)用到變壓器油紙絕緣狀態(tài)的評(píng)估中[1-3]。擴(kuò)
展德拜模型(extended debye model, EDM)因其絕緣
電阻 Rg 、幾何電容Cg 等變化趨勢(shì)能夠有效解釋絕
緣內(nèi)部的狀態(tài)變化,亦被廣泛認(rèn)可和用于輔助分析