220kV电站电气初步设计与长远规划.doc

目 录 中文摘要 1 英文摘要. 2 1 前 言 3 2 高压配电网的有功功率平衡计算 6 2.1 有功平衡计算原理 6 2.2有功功率平衡计算过程 7 3 输电线路电压等级的确定 9 4 主变压器的选择 10 4.1 主变型式的选择 10 4.2 主变容量和台数确定原则 10 4.3 主变容量和台数确定过程 11 5 电力网接线方案的选择 13 5.1 接线形式 13 5.2 电力网接线方案的选择 14 6 送电线路导线截面选择与校验 18 6.1 导线截面的选择 18 6.2 校验导线截面 20 6.3 导线截面计算 22 7 方案的比较 36 7.1 技术经济比较的原则和方法 36 7.2三种方案费用具体比较 38 8 电气主接线的设计 42 8.1 电气主接线的设计原则和要求 42 8.2 变电所主接线设计 43 9 变压器分接头的选择和电压调整 46 9.1 变压器分接头选择 46 9.2 调压计算 50 结论 51 致谢 52 参考文献 53 某高压配电网的规划设计 摘 要: 电网的设计作为电网建设中的重要一环，必须给予高度的重视。本文介绍了高压配电网设计过程。根据负荷资料变电所的地理位置和有电的供电情况功率平衡确定各变电所变压器主变。几种按经济选择导线，按机械强度、是否发生电晕、载流量校验导线从各种方案线路电能损耗线路投资变电所投资以及年运行费用等方面进行经济比较确定最佳的方案最后根据调压要求，选定调压方案。关键字：高压配电网?；电气主接线；调压 Planning and Design of a High-voltage Distribution Networks Abstract:Planning and design of power grid construction as an important part,must be given high priority. This paper describes the design and calculation of high voltage distribution grid. First, according to the load data, to be built substation location and supply situation of the existing power grid for power balance calculation. Determine the power grid voltage,transformer substation main transformer of each model and number of units. Then select several preliminary grid connection mode and choose according to the economic current density wire cross-sectional area, the use of the software to calculate the flow distribution Powerworld various programs,according to the mechanical strength,whether corona occurred conductor ampacity parity conditions. But also in terms of line power loss programs, the line of investment,substations and other investments and annual operating costs of economic compared to determine the best solution,and make sure each substation main wiring diagram. Finally,according to the results of the selected flow calculation program as well as the substation surge requirements, the selected voltage regulator solution. Keywords: High voltage distribution network;Power balance;the wire selecting Mai