Relay protection for autotransformer 220/110 kV
| Jazyk: | ruština |
|---|---|
| Rok vydání: | 2021 |
| Předmět: | |
| DOI: | 10.18720/spbpu/3/2021/vr/vr21-1673 |
| Popis: | РабоÑа поÑвÑÑена иÑÑледованиÑм Ñелейной заÑиÑÑ Ð°Ð²ÑоÑÑанÑÑоÑмаÑоÑа 220/110/10 кв. ÐзÑÑаÑÑÑÑ Ð·Ð°ÑиÑнÑе ÑÑÑÑойÑÑва, Ð½ÐµÐ¾Ð±Ñ Ð¾Ð´Ð¸Ð¼Ñе Ð´Ð»Ñ Ð°Ð²ÑоÑÑанÑÑоÑмаÑоÑа, влиÑние наÑÑÑÐµÐ½Ð¸Ñ ÑÑанÑÑоÑмаÑоÑа Ñока на заÑиÑÑ Ð¸ Ð¼Ð¾Ð´ÐµÐ»Ñ Ð¼Ð°Ð³Ð½Ð¸Ñной Ñепи авÑоÑÑанÑÑоÑмаÑоÑа. ÐадаÑи, ÑеÑаемÑе в Ñ Ð¾Ð´Ðµ иÑÑледованиÑ: 1. ÐÑÐ±Ð¾Ñ Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð² ÑнеÑгоÑиÑÑеме и ÑаÑÑÐµÑ Ñока коÑоÑкого замÑканиÑ. 2. ÐÑÐ±Ð¾Ñ Ð¸ ÑÑÑановка Ñелейной заÑиÑÑ Ð¸ авÑомаÑики(Ð ÐÐ). 3. РазÑабоÑайÑе маÑемаÑиÑеÑкÑÑ Ð¼Ð¾Ð´ÐµÐ»Ñ ÑÑанÑÑоÑмаÑоÑа Ñока, изÑÑиÑе ее влиÑние на ÑелейнÑÑ Ð·Ð°ÑиÑÑ Ð¸ ÑлÑÑÑиÑе вÑÐ±Ð¾Ñ ÑÑанÑÑоÑмаÑоÑа Ñока. 4. СмоделиÑÑйÑе авÑоÑÑанÑÑоÑмаÑÐ¾Ñ Ð¸ поÑÑÑойÑе Ð¼Ð¾Ð´ÐµÐ»Ñ Ð¼Ð°Ð³Ð½Ð¸Ñной Ñепи авÑоÑÑанÑÑоÑмаÑоÑа. РпÑоÑеÑÑе пÑоекÑиÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð±Ñли ÑÑÑÐ°Ð½Ð¾Ð²Ð»ÐµÐ½Ñ ÑооÑвеÑÑÑвÑÑÑие заÑиÑÑ Ð¾Ñ Ð²Ð¾Ð·Ð¼Ð¾Ð¶Ð½ÑÑ Ð½ÐµÐ¸ÑпÑавноÑÑей авÑоÑÑанÑÑоÑмаÑоÑа, ÑаÑÑÑиÑÐ°Ð½Ñ Ñоки коÑоÑкого замÑÐºÐ°Ð½Ð¸Ñ Ð¿Ñи макÑималÑном и минималÑном ÑÐµÐ¶Ð¸Ð¼Ð°Ñ ÑабоÑÑ, пеÑвонаÑалÑно вÑбÑан ÑÑанÑÑоÑмаÑÐ¾Ñ Ñока. ТеÑминал RET670 компании ABB бÑл вÑбÑан Ð´Ð»Ñ Ð¾Ñновной заÑиÑÑ Ð¸ ÑезеÑвной заÑиÑÑ Ð°Ð²ÑоÑÑанÑÑоÑмаÑоÑа, и бÑли вÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ñ ÑаÑÑеÑÑ ÑÑÑановки Ð´Ð»Ñ Ð²ÑÐµÑ Ð·Ð°ÑиÑ. ÐÑполÑзÑйÑе пÑогÑаммное обеÑпеÑение Python Ð´Ð»Ñ Ð¼Ð°ÑемаÑиÑеÑкого моделиÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÑанÑÑоÑмаÑоÑа Ñока ТÐФ-10 и полÑÑÐµÐ½Ð¸Ñ ÐµÐ³Ð¾ кÑивой Ñока намагниÑиваниÑ, кÑивой пеÑвиÑного и вÑоÑиÑного Ñока и кÑивой погÑеÑноÑÑи. ÐÑбиÑайÑе ТÐФ-10 и ТФÐ-35 в каÑеÑÑве ÑÑанÑÑоÑмаÑоÑов Ñока низкого и вÑÑокого напÑÑÐ¶ÐµÐ½Ð¸Ñ Ð´Ð»Ñ Ð´Ð¸ÑÑеÑенÑиалÑной заÑиÑÑ. ÐзменÑÑ Ð²ÐµÐ»Ð¸ÑÐ¸Ð½Ñ Ð¿Ð¾Ð³ÑеÑноÑÑи ÑÑанÑÑоÑмаÑоÑа Ñока, изÑÑаеÑÑÑ Ð¸Ð·Ð¼ÐµÐ½ÐµÐ½Ð¸Ðµ кÑивой ÑоÑÐ¼Ð¾Ð¶ÐµÐ½Ð¸Ñ Ð´Ð¸ÑÑеÑенÑиалÑной заÑиÑÑ. Ð ÑеÑез заклÑÑение ÑлÑÑÑиÑÑ Ð²ÑÐ±Ð¾Ñ ÑÑанÑÑоÑмаÑоÑа Ñока. The work is devoted to the research of relay protection of the autotransformer 220/110/10 sq. The protective devices necessary for the autotransformer, the influence of the saturation of the current transformer on the protection and the model of the magnetic circuit of the autotransformer are studied. Tasks solved in the course of the study: 1. The choice of equipment in the power system and the calculation of the short-circuit current. 2. Selection and installation of relay protection and automation (RPA). 3. Develop a mathematical model of the current transformer, study its effect on relay protection and improve the selection of the current transformer. 4. Model an autotransformer and build a model of the autotransformer magnetic circuit. During the design process, appropriate protections were installed against possible faults of the autotransformer, short-circuit currents were calculated at maximum and minimum operating modes, the current transformer was initially selected. ABB's RET670 terminal was selected for primary protection and autotransformer backup protection, and installation calculations were performed for all protections. Use Python software to mathematically simulate the TPF-10 current transformer and obtain its magnetizing current curve, primary and secondary current curve, and error curve. Choose TPF-10 and TFN-35 as low and high voltage current transformers for differential protection. By changing the value of the error of the current transformer, the change in the braking curve of the differential protection is studied. And through the conclusion to improve the choice of the current transformer. |
| Databáze: | OpenAIRE |
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