【摘要】随着经济的发展，人们生活水平的不断提高，人们对电力负荷的需求量是越来越大，之前的配电网也显现出了很多的问题，例如：变压器或者线路老化，线路容量小以及可靠性不高等问题，我们需要在经济高速发展的时代设计出符合新时代需求的配电网，并且对新的配电网规划方案进行经济与技术评估。贵州省雷山县处在贵州省的东南部，配电网设备普遍老化、线路容量小以及供电可靠性低等问题，导致了雷山县的配电网网架结构单薄和电能损耗太大等问题。本次毕业设计研究将结合雷山县配电网的现状以及对未来的需求，对已有的配电网中期规划方案进行分析，使用etap软件对规划方案进行建模，最后对规划方案进行经济与技术评估。最终，经过评估，雷山县配电网中期改造方案符合要求，可以实施。关键词：配电网；电网规划；经济评估；技术评估【Abstract】Alongwiththedevelopmentoftheeconomy,thecontinuousimprovementofpeople'slivingstandard,peopleofpowerloaddemandisbiggerandbigger,priortothedistributionnetworkisalsoshowingalotofproblems,suchas:transformerorline,aginglinecapacityissmall,andthereliabilityisnothigh,weneedintheeraofrapideconomicdevelopmentofdistributionnetworkdesigncanmeetthedemandofnewera,andnewdistributionnetworkplanningforeconomicandtechnicalevaluation.Leishancountyislocatedinthesoutheastofguizhouprovince.Theproblemsofagingdistributionnetworkequipment,smalllinecapacityandlowpowersupplyreliabilityleadtotheproblemsofthindistributionnetworkstructureandlargepowerlossinleishancounty.Thisgraduationdesignresearchwillcombinethecurrentsituationofdistributionnetworkinleishancountyandfuturedemand,analyzetheexistingmedium-termplanningschemeofdistributionnetwork,useetapsoftwaretomodeltheplanningscheme,andfinallymakeeconomicandtechnicalevaluationoftheplanningscheme.KeyWords:powerdistributionnetwork、powergridplanning、economicassessment、technicalevaluation目录................................................................1......................................................1................................................1..................................................1..................................................2......................................................2..................................................3........................4..............................................4..............................................4..........................................4..........................................4..........................................5..............................................5....................................................5....................................................6..............................9..........................9..................................9...................................................9...................................................11...............................12...............................14.......................................14.....................................14.......................................................15...................................................15....................................................16.......................................................19...............................................20.................................................21.................................................21...................................................22.......................................................22............
