xx企业35kv变电所电气设计(一次部分) .doc

某企业35kV变电所电气设计(一次部分) 摘 要 本篇毕业设计的课题是35kV变电所电气设计”，主要是关于强电部分的设计。从主接线、短路电流计算、主要电气设备选择等几个方面对变电站进行了阐述，并绘制出电气主接线图、电气总平面布置图、防雷图等相关图纸。由于两条独立电源进线，本次设计采用两台主变压器，并根据给定的计算负荷8000kVA变压器SZ11-8000/35最终确定35kV电压等级侧采用接线方式6kV电压等级侧采用单母分段式接线方式。包括断路器、隔离开关、熔断器、电流互感器、电压互感器、母线、避雷器按正常工作条件下选择设备的额定电流额定电压及型号，按短路情况下校验设备的热稳定、动稳定以及开关的开断能力 Abstract This graduation thesis is about “Electric design for an enterprise”. It is mainly about the design of heavy current system. This design separately from the main connection, short-circuit current calculation, the main electrical equipment selection and so on several aspects of substation were introduced, and map out the main electrical wiring, electrical general layout, lightning protection and pick up the map and related drawings. Because there are two separate power lines, the design uses two main transformers, and according to the given load, rated capacity of up to 8000kVA transformers SZ11-8000/35 is selected. By comparing the various advantages and disadvantages of main wiring scheme, finalize 35kV voltage line transformer connection 6kV voltage single-segment connection. Draw on the basis of main electrical wiring diagram, as a short circuit when you choose high and low-side short circuit of main transformer, calculation of short circuit current, so as the basis for selection and check the main electrical equipment. Main electrical equipment including circuit breakers, disconnections, fuse, current transformers, voltage transformers, bus, lightning arrester. Under normal operating conditions the rated current, rated voltage and model of the device, by short circuit case calibration device of thermal stability, stability and the breaking capacity of the switch. Major electrical equipment were selected on the basis of, you can draw out the final electrical wiring diagram, floor plan, lightning protection and grounding. Key Words: The Main Transformer, the Electricity Lord Connects the Line, the Short-circuit Current, the Electrical Equipment 目 录 摘