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Measures to improve the reliability and safety of rural electricity Abstract: as a pilot county for the two rural transformation, the transformation of rural electricity has already been completed and the same price has been implemented. In the agricultural transformation, strengthening the reliability and safety of rural electricity is put in an important position. The following mainly talks about our measures to strengthen the reliability and safety of rural electricity in agricultural construction

key words: Agricultural reliability and safety Untitled Document our bureau, as a pilot county and district of rural two transformation, has already completed the transformation of rural electricity and implemented the same price. In agricultural transformation, strengthening the reliability and safety of rural electricity is put in an important position. The following mainly talks about our ways to strengthen the reliability and safety of rural electricity in rural construction: 1. Reasonable distribution structure (1) double power points: our district has one original 220kV substation, one 110kV substation, three 35kV substations, and nine 35kV lines. In the rural reconstruction, a 35KV transformer and a 35KV line, about 2.1km, have been newly built, and about 10km of 35kV lines have been reconstructed, so that each substation can ensure two power supply points. A ring form is formed between some substations, which increases the reliability of the power supply of the substation. (2) Ring connection: in the rural reconstruction, we have newly built about 41.8km of 10kV lines, reconstructed 6.22km, and newly installed about 15 vacuum circuit breakers. The above large-scale reconstruction and construction further form a ring structure through switches and single poles at the ends of 10kV trunk lines connected from different switching stations (substations). At the same time, each main line is segmented with vacuum circuit breakers and knife switches in the middle from a domestic perspective, so as to reduce the scope of power failure and maintenance, The ends of the two low-voltage trunk lines from different public transformers are also connected through switches and knife switches, so that the low-voltage lines are also connected into a ring structure. The above transformation further strengthens the interconnection and mutual supply capacity of farmers, reduces the scope of power failure during fault and maintenance, and increases the reliability and safety of electricity. (3) Strengthen the rural planning, increase the wire diameter, and improve the power supply margin of rural electricity: in the rural reconstruction, further strengthen the planning and design of all high and low voltage distribution and rural public transformers, and the competent departments shall strictly control them; The wire diameter has been increased scientifically in the transformation. 150mm2 wire or 120mm2 wire is basically used for the main line of rural 10kV line, 95mm2 for the outgoing cable of rural public transformer, 70mm2 for the main line of comprehensive line and 50mm2 for the branch line; Agricultural line 25mm2; Street light line 25mm2; At the same time, reduce the power supply radius of rural public transformers. The power supply radius of a single distribution transformer is generally less than 500m. The power supply radius of market towns and villages with concentrated loads is less than 300m, and that of mountainous areas is less than 800m; The connecting line adopts aluminum-plastic wire of no less than 10mm2 for 1 ~ 2 households, no less than 16mm2 for 3 ~ 4 households, and no less than 25mm2 for 5 ~ 6 households. The increase of wiring diameter greatly strengthens the power supply capacity of electricity. 2. Take the lead in science and technology, strengthen technical measures, and vigorously promote the use of new products (1) gradually use high-voltage cables and insulated conductors in rural power transformation. Our bureau used about 2.96km of cables with different specifications in the agricultural reconstruction, and used insulated wires where the safety distance was not enough. The free lifetime maintenance grid was 35 ~ 120mm2, and the specification of low-voltage insulated wires was 35 ~ 95mm2, which greatly reduced the failure rate and played a great role in improving the reliability and safety of electricity. (2) The pin insulator is replaced by the rod insulator. Due to its poor withstand voltage capacity, the pin insulator often breaks down in the thunderstorm season, causing single-phase grounding, and the fault point is not easy to find, which prolongs the power outage time. After the rod insulator is used, the situation is greatly improved. (3) Replace oil circuit breaker with vacuum circuit breaker. The technical performance and safety of vacuum circuit breaker are much higher than that of oil circuit breaker. (4) The metal oxide arrester replaces the valve arrester to enhance the ability of line lightning protection and overvoltage prevention. (5) Adopt fully sealed transformer: the original S7 transformer, after being put into operation, makes the transformer absorb too much water, which affects the service life and operation safety of the transformer. Now, fully sealed transformers are gradually used, which are safe, reliable and economical. After application, the accidents of our transformers will be reduced. 3 realize distribution automation and computer management (1) dispatching automation: realizing distribution automation is an inevitable trend to improve the reliability of power supply. Under current conditions, we first realize the dispatching automation of switching stations and substations. The telecontrol situation of the switchyard is: remote opening, remote closing, switch closing and opening status, the semaphore of various signal relays, 10kV bus voltage and 10kV incoming and outgoing line current that can stretch, compress, zigzag, peel, shear and other functional experiments on various data. The terminal RTU adopts rts-200 AC sampling distributed modular structure, and the dispatching end is swj-700 system with wireless channel and a wireless. (2) MIS Development: the development of MIS ensures the reliability of power supply in terms of management. The key of MIS is the development of GIS (Geographic Information System), that is to have a good map. The location of almost every pole is marked on the map. After the development is successful, we will connect all power supply stations, substations, dispatching rooms, etc. with optical cables to achieve information sharing. This makes the distribution play a great role in planning, locating the fault point, displaying the scope of power failure, finding the weak links of distribution, and so on. During the agricultural transformation, the organization was further improved, the management system was improved, the reliability statistics and analysis were strengthened, and the weekly power outage plan was implemented for maintenance and projects. The reliability and safety of rural electricity have been greatly strengthened. The price of aluminum, nickel and zinc in rural electricity is lower than its marginal cost, which has increased from 0.99528 in 1998 to 0.99689. At the same time, accidents have also been greatly reduced

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