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621.311 (218) |
Electrotehnică (1154) |
SM ISO690:2012 TIMASHOVA, L., SHAKARIAN, Yu., KAREVA, S., POSTOLATY, Vitaly M., BYCOVA, Elena V., GORYUSHIN, Yu.. 110–500 kV compact controlled оverhead lines. In: Управляемые электропередачи: Сборник трудов лаборатории управляемых электропередач Института энергетики АН Молдовы, 1 ianuarie 2007 - 31 decembrie 2017, Chişinău. Chișinău, Republica Moldova: Институт энергетики, 2017, pp. 8-14. |
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Управляемые электропередачи 2017 | ||||||
Sesiunea "Управляемые электропередачи" Chişinău, Moldova, 1 ianuarie 2007 - 31 decembrie 2017 | ||||||
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CZU: 621.311 | ||||||
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Nowadays modern overhead transmission lines (OHL) constructions having several - high-speed phase control and adjustable compensation systems are used (such as |
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Cuvinte-cheie compact controlled OHL – transmission capacity – phase control |
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Cerif XML Export
<?xml version='1.0' encoding='utf-8'?> <CERIF xmlns='urn:xmlns:org:eurocris:cerif-1.5-1' xsi:schemaLocation='urn:xmlns:org:eurocris:cerif-1.5-1 http://www.eurocris.org/Uploads/Web%20pages/CERIF-1.5/CERIF_1.5_1.xsd' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' release='1.5' date='2012-10-07' sourceDatabase='Output Profile'> <cfResPubl> <cfResPublId>ibn-ResPubl-106553</cfResPublId> <cfResPublDate>2017</cfResPublDate> <cfStartPage>8</cfStartPage> <cfISBN></cfISBN> <cfURI>https://ibn.idsi.md/ro/vizualizare_articol/106553</cfURI> <cfTitle cfLangCode='EN' cfTrans='o'>110–500 kV compact controlled оverhead lines</cfTitle> <cfKeyw cfLangCode='EN' cfTrans='o'>compact controlled OHL – transmission capacity – phase control</cfKeyw> <cfAbstr cfLangCode='EN' cfTrans='o'><p>Nowadays modern overhead transmission lines (OHL) constructions having several<br />significant differences from conventional ones are being used in power grids more and more<br />widely. Implementation of compact overhead lines equipped with FACTS devices, including<br />phase angle regulator settings (compact controlled OHL), appears to be one of the most<br />effective ways of power grid development.<br />Compact controlled AC HV OHL represent a new generation of power transmission<br />lines embodying recent advanced achievements in design solutions, including towers and<br />insulation, together with interconnection schemes and control systems.<br />The main features of compact controlled OHL are as follows [1, 2]:<br />- phase-to-phase distances (both on towers and within the spans) are extremely reduced<br />to minimal required values subject to regulatory restrictions on the dielectric strength of<br />“phase to phase” gaps, taking into account the maximum operating voltages and switching<br />and lightning overvoltages;<br />- split phases have an optimal design subject to existing maximum conductor surface<br />electric field strength requirements adopted for corona discharge elimination;<br />- tower phases are so configured as to have the grounded tower parts (poles, crossarms,<br />suspension components) placed outside the space between approached phases;<br />- if necessary, insulating elements (insulating spacers or ties) are installed in spans<br />between approached phases of OHL to maintain the selected distance between phases and<br />damp conductor’s vibrations or galloping under severe weather conditions, thus ensures a<br />high level of mechanical stability and operating reliability for approached phases in spans;<br />- angular shifts are created between voltage vectors applied to approached phases of<br />compact controlled lines: in the case of three-phase single-circuit compact OHL, an angle of<br />120 electrical degrees between three approached phases of OHL and, in the case of doublecircuit<br />compact controlled self-compensating overhead lines (CSOHL) between approached<br />phases of different circuits, an angle controlled within 0–120 (0-180) electrical degrees or<br />fixed at 120 or 180 electrical degrees, while maintaining an angle of 120 electrical degrees<br />between voltage vectors of each single circuit;</p><p>- high-speed phase control and adjustable compensation systems are used (such as<br />FACTS devices);<br />- special algorithms are used for controlling the OHL mode parameters in accordance<br />with the preset requirements and adaptable to changing conditions in the normal and<br />emergency operation modes;<br />The above mentioned technical solutions can be used together or separately.<br />Compared to conventional OHL, compact-design OHL equipped with FACTS devices<br />provide the following:<br />– 1.2-1.6-fold increase in OHL capacity without raising their voltage class;<br />– 1.5–2-fold reduction in the area of land allocated for OHL with equal capacity;<br />– electromagnetic field reduction in the external space thus environment and people<br />impact decrease;<br />– 15–30% decrease of total costs per power transfer unit;<br />– provide power flow value and direction control in power systems;<br />– operating efficiency of reactive power control improvement;<br />– total energy losses reduce in the power system;<br />– increase OHL mechanical strength under severe weather conditions<br />Compact controlled OHL can be used as intersystem and intrasystem high-voltage<br />connections and for power distribution, ensuring that issues of power transmission and<br />distribution are addressed at a qualitatively new level.<br />Results of comprehensive research and development in relation to 110–500 kV compact<br />controlled power transmission lines together with theoretical basis, substantiation, and<br />methodological approaches to their practical application are given in the present paper.</p></cfAbstr> <cfResPubl_Class> <cfClassId>eda2d9e9-34c5-11e1-b86c-0800200c9a66</cfClassId> <cfClassSchemeId>759af938-34ae-11e1-b86c-0800200c9a66</cfClassSchemeId> 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