Power supply design of the hottest Runyang Bridge

Runyang Bridge power supply design

Abstract: This paper expounds the power supply design scheme of Runyang Bridge, compares the similarities and differences between Runyang Bridge and Jiangyin Bridge, Nanjing second bridge power supply, and puts forward the innovation points and difficulties in the design and construction of Runyang Bridge power supply scheme

key words: overview of untitled documents under the power supply of Runyang Bridge Runyang Yangtze River Highway Bridge and the South extension section are 34.082 kilometers long, with 6 toll stations and 1 hub (Dantu hub), including the South Ring Interchange, the main line toll station, the riverside interchange, the Shiyezhou interchange, the Yuejin Road Interchange, G312 interchange, etc. There are 14 power supply points in the whole bridge. In addition to the above 6 toll stations, there are also the main tower and anchor of the South Branch suspension bridge, the main tower of the North Branch cable-stayed bridge, the south bank bridge area, the north bank bridge area, etc. The total power consumption capacity is 8700kva. Runyang Bridge connects Zhenjiang and Yangzhou from north to south, and is under the jurisdiction of different power supply departments. Zhenjiang power supply conditions: No. 3 in nan'anqiao District: the 35/10kv main substation has been built with uniform thickness, and the two 35kV incoming lines are respectively led by Zhenjiang Wuzhou substation and Jiangqiao substation. These two substations are the higher grade substations in Zhenjiang area. At this time, it can be determined that the fault 1 is located on the electromagnetic transfer valve, so as to fully ensure that the components composed of different experimental machines are also different, which proves the reliability of the incoming power supply of Daqiao 35/10kv main substation. The main substation adopts two 35/10kv oil immersed transformers with a capacity of 6300KVA, with a total installed capacity of 12600kva, and a total of 8 10kV feeders; Yangzhou power conditions: a 10KV switching station has been built in the north bank bridge area, and the two incoming lines are led from Yangzhou 35/10kv Guazhou substation. II Comparison and selection of power supply schemes load estimation schedule of power supply points along the whole line of Runyang Yangtze River Highway bridge pile number transformer capacity equipment installation capacity first-class load calculation South Ring Interchange toll station k2+000 400KVA 306.5 kW 85.5kw main line toll station k3+800 315 KVA 272.7kw 95kw Yanjiang Road Interchange toll station k11+000 400KVA 342.54kw 86Kw Yuejin Road interchange toll station k19+380 250 KVA 215.7kw 82kw 312 interchange toll station k23+310 315KVA 24 3kw 81kw Shangdang interchange toll station k32+000 500KVA 398.54kw 78kw Yangzhou north bank bridge area k14+131 (nearby) 500KVA 510kw 60kW Shiyezhou bridge area (including Shiyezhou Interchange) k15+700 (nearby) 2000kVA 2250kw 330kw Zhenjiang South Bank Bridge area k18+300 (nearby) 3400kva 3842.8kw 150KW total power consumption capacity of the whole line 8710kva 8981.78kw 1197.5kw according to the importance of each power consumption point and its electrical equipment and the degree of impact after power supply interruption, The load level of each point can be divided into level I load and level II load. Class I load: including the power consumption of communication, monitoring and charging system equipment, the power consumption of internal maintenance and dehumidification equipment of the main bridge, road lighting of the main bridge, fire-fighting facilities, etc. Secondary load: office lighting, air conditioning, landscape lighting, domestic water pump facilities, etc. Scheme 1 of the whole bridge power supply system: the main bridge is composed of the South Branch suspension bridge, the North Branch cable-stayed bridge and the Shiyezhou viaduct. The main bridge and the South connection are powered by the 35/10kv main substation of the bridge, and the North connection is powered by a new composite wire that can replace the metal material 0kv north bank switching station. Yuejin Road Interchange, 312 interchange and Shangdang interchange are powered by two 10kV feeders of 35/10kv general substation and double power rings; Shiyezhou bridge area (including Shiyezhou Interchange) is powered by two 10kV feeders from 35/10kv main substation, and 10kV cables are led to Shiyezhou through suspension bridge steel box girder; The main bridge adopts 5.5kv ring power supply, and the power supply is led out by the 10/5.5 transformer of the substation in nan'anqiao district. The North connection is powered by two 10kV power rings provided by the north bank switching station. Scheme 2: the main bridge and Yuejin Road interchange are powered by the 35/10kv main substation of the bridge, the 312 interchange and Shangdang interchange of the South connection are powered by the substation of the nearest power supply department, the Shiyezhou bridge area (including Shiyezhou Interchange) is powered by two 10kV feeders from the 35/10kv main substation, and the 10kV cable is led to Shiyezhou through the steel box girder of the suspension bridge; The south belt interchange, main line toll station and Yanjiang Road Interchange connected to the north are powered by the nearest power supply department substation, cable-stayed bridge and Shiyezhou viaduct, which are powered by Nan'an bridge substation and Shiyezhou substation respectively. The main bridge is set with the South Tower substation of the South Branch suspension bridge