电网技术
電網技術
전망기술
POWER SYSTEM TECHNOLOGY
2011年
8期
155-160
,共6页
220/20%kV%负荷密度%电网规划%精神磨损
220/20%kV%負荷密度%電網規劃%精神磨損
220/20%kV%부하밀도%전망규화%정신마손
220/20 kV%load density%power network planning%spirit-wear
建立了220／20kV序列的电网模型，推导了变电站投资、网损费用及电网投资年费用关系式。引入精神磨损理论分析113序列电网的隐形价值流失，通过比较新、旧电网年费用可制定合理的电网改造投资决策。分析了新建区域和旧网改造情况下220／110／10、220／110／20、220／20kV3个电压序列的技术经济性，建议新建区域考虑采用220／20kV电压序列供电，投运时间超过15a且负荷密度大于33MW／km2时，将原电网220／110／10kV电压序列改造为220／20kV电压序列能取得良好的经济效益。
建立瞭220／20kV序列的電網模型，推導瞭變電站投資、網損費用及電網投資年費用關繫式。引入精神磨損理論分析113序列電網的隱形價值流失，通過比較新、舊電網年費用可製定閤理的電網改造投資決策。分析瞭新建區域和舊網改造情況下220／110／10、220／110／20、220／20kV3箇電壓序列的技術經濟性，建議新建區域攷慮採用220／20kV電壓序列供電，投運時間超過15a且負荷密度大于33MW／km2時，將原電網220／110／10kV電壓序列改造為220／20kV電壓序列能取得良好的經濟效益。
건립료220／20kV서렬적전망모형，추도료변전참투자、망손비용급전망투자년비용관계식。인입정신마손이론분석113서렬전망적은형개치류실，통과비교신、구전망년비용가제정합리적전망개조투자결책。분석료신건구역화구망개조정황하220／110／10、220／110／20、220／20kV3개전압서렬적기술경제성，건의신건구역고필채용220／20kV전압서렬공전，투운시간초과15a차부하밀도대우33MW／km2시，장원전망220／110／10kV전압서렬개조위220／20kV전압서렬능취득량호적경제효익。
A mathematical model for distribution network adopting 220/20 kV voltage series is built; and relational expression of substation investment, network loss cost and annual cost of network investment is derived. The spirit-wear theory is led in to analyze the invisible value run-off on distribution network adopting old voltage series. By means of comparing the annual cost of power network adopting new and old voltage series, the rational investment decision-making for distribution network renovation can be drawn up. The techno-economies of three voltage series, namely 220/110/10 kV, 220/110/20 kV and 220/20 kV, adopted for newly built distribution network and for the renovation existing distribution network are anlayzed, thus it is suggested that the 220/20 kV voltage series should be applied to the power supply for newly built areas; for existing distribution nework, when its being operated period is longer than 15 years and the its load density is higher than 33 MW/km2, it is suitable to renovate the existing distribution network from adopting old voltage series 220/110/10kV to adopting 220/20kV voltage sereis and satisfied economic benefit can be attained.
