【摘要】：變壓器繞組變形導(dǎo)致的內(nèi)部匝間故障已經(jīng)上升至事故率的首位,對電網(wǎng)安全性危害極大。為此,提出一種變壓器繞組變形在線監(jiān)測工程方法。利用以傅里葉為理論基礎(chǔ)的動(dòng)態(tài)向量模型,在保持高精度的條件下簡化變壓器電磁暫態(tài)模型,并討論不同運(yùn)行狀態(tài)下模型參數(shù)辨識解的個(gè)數(shù)。當(dāng)變壓器空載合閘時(shí)辨識出繞組電阻參數(shù),在變壓器穩(wěn)態(tài)運(yùn)行時(shí)利用已辨識出的電阻參數(shù)修改參數(shù)辨識模型,并辨識漏感參數(shù)。利用繞組變形與漏電感參數(shù)之間的關(guān)系,實(shí)現(xiàn)對變壓器繞組變形在監(jiān)測。建立了變壓器繞組變形的仿真模型,使用有限元方法計(jì)算變壓器繞組變形的短路電感值,驗(yàn)證了變壓器繞組在線監(jiān)測方法的有效性。
[Abstract]:The inter-turn fault caused by transformer winding deformation has risen to the top of the accident rate, which is harmful to the power network safety. In this paper, an on-line monitoring method for transformer winding deformation is proposed. In this paper, the dynamic vector model based on Fourier theory is used to simplify the electromagnetic transient model of transformer under the condition of high accuracy, and the number of identification solutions of the model parameters in different operation states is discussed. The windings resistance parameters are identified when the transformer is closed without load, and the identified resistance parameters are used to modify the identification model during the steady operation of the transformer, and the leakage inductance parameters are identified. Based on the relationship between winding deformation and leakage inductance parameters, transformer winding deformation is monitored. The simulation model of transformer winding deformation is established, and the short circuit inductance of transformer winding deformation is calculated by finite element method, which verifies the effectiveness of on-line monitoring method of transformer winding.
【作者單位】： 上海電力學(xué)院電氣工程學(xué)院;重慶大學(xué)電氣工程學(xué)院;
【基金】：重慶大學(xué)輸配電裝備及系統(tǒng)安全與新技術(shù)國家重點(diǎn)實(shí)驗(yàn)室訪問學(xué)者基金項(xiàng)目支持(2007DA10512712407)
【分類號】：TM403.2

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本文編號：2256728