恩泽托kv变电站.docxVIP

3. N’zeto400/220/60kVSubstationN’zeto400/220/60kV变电站3.1 General项目概况The N’zeto 400kV Substation is located in nearby N’zeto city of Angola. The city has the average annual air temperature of 22℃.N’zeto 400kV变电站坐落在安哥拉的N’zeto附近，年平均温度22℃。A new 400kV substation will be constructed. The system wiring diagram of N’zeto 400kV Substation is shown as below: 本工程新建400kV变电站，N’zeto400kV变电站系统接线图如下：Figure 3.1System wiring diagram of N’zeto400kV SubstationN’zeto400kV变电站系统接线图3.2 Electrical part电气部分3.2.1 Design standard设计标准3.2.1.1 IEC3.2.1.2 IEEE3.2.2 Construction capacity工程规模Capacity: 规模FourUnits of 400/220/15kVSingle-phase autotransformer with the capacity of 30MVA;4台400/220/15kV单相自耦变压器，容量30MVA；Oneunit of 220/60/15kV three-phase power transformers with the capacity of 63MVA, and the foundation place for the third transformer will be prepared；1台220/60/15kV三相电力变压器，每台容量为63MVA；并为第三台变压器准备一个基础。There will be four circuits of 400kV outgoing lines, of which two circuits will outgo to the Kapary 400kV substation and two circuits to the Soyo 400kV substation.400kV出线4回，2回出线至Kapary400kV变电站，2回出线至Soyo400kV变电站。There will be one circuit of 220kV outgoing lines. 220kV出线1回。There will be two circuits of 60kV outgoing lines. 60kV出线2回3.2.3 Main electrical wiring电气主接线One and a half circuit breaker wiring will be employed for 400kV bays. Two outgoing lines from Soyo substation and to Kapary substation and one incoming line to transformer banks (4 units) will be constructed with two complete strings and one incomplete string. 400kV线路采用1个半断路器接线。2回出线从Soyo变电站至Kapary变电站，1回进线至变压器组（4组），2个完整串，1个不完整串。The 220kV will be double busbars with transfer busbar and the 60kV, double busbars.220kV采用双母线带旁路接线，60kV采用双母线接线。See the attachedSINGLE LINE DIAGRAM for details.具体电气接线请详见附图- SINGLE LINE DIAGRAM。3.2.4 Selection of main equipment主要电气设备选择400kV transformer：single-phase oil-immersed on-load tap change autotransformer with the transformation ratio of 400/2208x1.25%/15kV and capacity of 30MVA；400kV变压器：单相油浸有载调压自耦变压器，变比为：400/22