Application of 110 kV outdoor combined electric appliance in Nanzha Substation
Application of 110kV outdoor combination electric appliance of Jiangsu Electric Engineering in Nanzha Substation Sheng Benyun Gu Lianqing 2 (1. Jiangsu Electric Power Company, Nanjing 210024; Jiangyin Power Supply Bureau, Jiangyin 214400) social and economic benefits. 21 use slightly, but rise from the length of 0. At present, in China's rural power network (referred to as rural network) 10kV substation, 110kV power distribution equipment usually adopts two modes: one is open outdoor, the other is indoors Sulfur hexafluoride closed combination electrical appliance (GIS). The 110kV substation of Jiangsu Rural Network is basically open. In order to improve the technical level of the power supply facilities of rural power grids, explore the new mode of construction of 110kV substation of rural power grids, and combine the development of the 110kV Nanzha substation in Jiangyin City according to the development direction of “outdoor, miniaturization, safety and reliability, and advanced technologyâ€. With its developed economy and less cultivated land, its 110kV outdoor high-voltage power distribution unit uses the outdoor Compass combination electric appliance produced by ABBADDA and Yunnan Switch Factory, which is a 145kV trolley-type combination electric appliance. The 110kV Nanzha Substation is a special project for the construction and reconstruction of the agricultural network in Jiangsu Province in 1999. It plans to build two 40MVA transformers with a voltage rating of 110kV/10kV and one in the current period. 110kV incoming line is two times, inner bridge wiring, outdoor layout; 10kV adopts single busbar segmentation wiring, indoor layout. The plan is for 16 rounds of exit, and this period is 8 rounds. The substation started construction at the end of 1999 and was put into operation on April 27, 2000, which is an unattended substation. Since the construction of large-scale agricultural network construction and renovation project in Jiangsu Province, a total of 89 110kV substations have been built, of which: 4 110kV power distribution units adopt GIS and a small number of indoor layouts, mainly used in urban areas of county-level cities; The rest of the seats are Compass (Jiangyin South Gate, Dafeng Cao Temple is under construction) and the rest are open. Judging from the construction and commissioning of these substations, the Nanzha substation of the Compass combination electric appliance with rice has gradually appeared its advantages compared with the conventional substation. The following two aspects of economic and technical comparison with conventional methods to illustrate the general advantages of high-voltage outdoor combined electrical appliances. 1 Economic performance comparison 1.1 Covers an area of ​​733m2 and the conventional open floor area is about 3667m2, and the floor space is reduced by 50%. Among them, the 110kV outdoor power distribution unit covers an area of ​​927m2, and the conventional open type covers an area of ​​1400m2. The land area has been reduced by 34%. Not only has the land acquisition and less expenditure compensation fees been reduced, but the land area has been greatly reduced, which has solved the problem of land tension in the rural economic development of Jiangsu Province. 1.2 Installation and construction cost of the power distribution unit is low. Due to the high completeness of the Cpmpass combination, the installation cost is greatly reduced. The installation cost of the power distribution unit is 70,000 yuan, while the conventional open installation cost is about 120,000 yuan. The cost is reduced by 42%. The civil construction cost of the 110kV power distribution unit of the substation is 300,000 yuan, and the conventional open-type civil construction cost is 550,000 yuan, and the cost is reduced by 45%. The equipment price of 110kV outdoor power distribution equipment is higher. The equipment cost of the outdoor power distribution unit is about 3 million yuan, while the conventional open type of the same scale is about 1.8 million yuan, and the equipment cost is increased by 66%. The cost of the entire substation is analyzed to analyze the substation constructed with the 110kV Compass combination electric appliance scheme. Compared with the substation built by the conventional open plan, the former has more power for one construction, and the operation and maintenance costs will be greatly reduced. It is preliminarily estimated that the part of the former that has invested more can be recovered within 4 years, so the construction plan adopting the combined electrical appliance program is economically reasonable. 2 Technical performance comparison 2. Equipment performance reliability Each of the ground-insulated pillars in the high-voltage power distribution device may be the insulation weakness of the live conductor to the ground flashover. To improve the reliability of the equipment operation, the ground insulation should be minimized. The number of pillars. The conventional solution is to have a total of 18 insulated pillars for each gap. Compass combines these electrical devices together, with only nine ground-insulated pillars per space, which reduces the possibility of flashover to ground by half, improving operational reliability. The performance of the circuit breaker and the isolation opening and closing lock is realized in the Compass combination electric appliance, and it is not necessary to consider the secondary cable to be installed with the electromagnetic lock, which is simple and reliable. It effectively prevents the habitual illegal operation of the disconnector with the load and the disconnector with the load when the breaker is closed. 2.2 The scientific combination of components is combined, and the structure type of the trolley type circuit breaker is adopted. It consists of two major parts, activity and fixation. Since the combined electrical appliance is designed and processed in the factory, its structure is reasonable, the components are reliable, and the use is convenient. 2. The wiring arrangement is beautiful. The connection between the conventional 110kV substation equipment and the equipment and the connection between the equipment and the busbar are connected by aluminum wires and equipment clamps that meet the requirements of electrical thermal stability. The wiring and busbars of the Compass combination are made of hard busbars, which are made of aluminum alloy tubes. The connection between the spacers and the busbars is also made of aluminum alloy tubes, and the spacing to the busbars takes into account the self-supporting force, so that they can be directly connected without any need. The steel frame and the intermediate supporting insulator, the insulator terminal on the trolley can support the entire busbar system, and the busbars of each phase are connected to form an inverted structure, so that the substation wiring arrangement is neat and beautiful. 2. Installation and commissioning Fast installation of ordinary electrical equipment requires the electrical equipment in one interval to be transported to the substation site as 12 single-phase devices (single-phase isolation switch, 3 single-phase circuit breakers, 3 single-phase current transformers). They are installed on separate equipment brackets, and then three-phase linkage debugging. The installation time is long and the debugging is complicated. The active parts of the Compass combination are all assembled and commissioned in the manufacturing plant. Only six fixed brackets need to be installed at the substation site, and then the connection between the movable part and the fixed part is carried out. This shortens the installation cycle and simplifies the commissioning work. The installation of three interval devices in the Nanzha substation took only three days. 2.5 Routine Maintenance From the above analysis, as Compass reduces the number of insulated pillars of conventional electrical equipment by half, the workload of regularly cleaning porcelain bottles is also reduced by half, and maintenance is convenient. The circuit breaker of the conventional electrical equipment must be operated to operate the electric operating mechanism of the two isolating switches. Compass only needs one electric operating mechanism to operate the trolley to stop the circuit breaker, and the operation amount is reduced by half, and the busbar switch is not considered. The sequence of operations with the outlet knife. Compass operation is convenient and simple, the number of operations is reduced, the probability of misoperation is small, and because of its shrinking footprint, the patrol path for regular inspections by the operating personnel is shortened, and the secondary control cable is also greatly shortened, making daily maintenance easier and more convenient. 2.6 In accordance with the requirements of the regulations, when the circuit breaker is to be taken out of operation for maintenance, the trolley at the bottom of the circuit breaker and the current transformer is horizontally moved 1200 mm to the right. At this time, an obvious air gap is formed at both ends of the circuit breaker. The breaking point is 1 200 mm larger than the regulation 900 mm. Requirements to meet safety regulations and technical requirements. In summary, the Compass combination electric appliance technology is advanced, the structure is reasonable, and the power distribution device construction scheme adopts the outdoor combination electric appliance, which is technically feasible. 3 Conclusion Because of the high technology content of Compass combined electrical appliances, the maintenance workload is small, especially the small footprint, saving farmland, is of great significance to the implementation of the national economy sustainable development strategy, it represents the development direction of substation equipment, in the city The towns and the more developed eastern coastal areas should be actively promoted and applied. Welcome Submission Welcome Welcome Subscribe Advertise bookmark10 (Finish) Facial Cleanser,Face Wash For Oily Skin,Face Wash For Dry Skin,Acne Face Wash,moisturizing facial cleanser Guangzhou cosmeceuticals daily chemicals PTY,.LTD. , https://www.gzcosmetics.com