Along with the roar of the motor, the large-tonnage crane stretched the arm to lift the high-pressure side C-phase casing in place. The 220-kV Hukou station of Shanxi Linyi Power Supply Company's operation and maintenance of the newly replaced No. 2 main transformer body was in place. The node is complete.
The 220 kV Hukou Substation is located in Yuli Town, Ji County. It was completed in March 2008. It has two original three-phase three-winding auxiliary air-cooled main transformers. The single capacity is 120 MVA, and it bears the Jixian County in Linyi. The power supply task of Xiangning and Puxian has a maximum load of 130 MW in 2013. In recent years, driven by the deployment of the country's central and western strategic development, the economy has achieved leap-forward development within the scope of power supply, and the power supply load has been rising year after year. With the implementation of the comprehensive mining and deep processing project of the Xiangning and Jixian coal mines, the Linyi-Jixian section of the Qinglan Expressway and the commissioning of the central and southern railways, the Hukou station will add 180-250 MW of load, the original main transformer capacity. It will be difficult to guarantee the need for new loads. According to the power grid plan, the Hukou substation will carry out capacity expansion and transformation work, replacing the original main transformer with an oil-immersed self-cooling transformer, and the capacity of the single unit will increase to 180 MVA, which can basically meet the surrounding power supply requirements after replacement.
In this project, two sets of 10 megabytes of shunt capacitor banks will be added. In the same period, the main transformer nitrogen-filled fire extinguishing system and oil chromatography online monitoring system will be equipped. At the same time, the No. 2 main transformer protection, 35 kV II section protection and control device, UPS, GPS will be replaced. Such equipment, the construction unit is the State Grid Shanxi Transmission and Transformation Engineering Company, the electrical shutdown period is expected to be 21 days. After the new main transformer is put into operation, it will greatly enhance the power transmission capacity in the Linshan Xishan area, effectively alleviate the power shortage in the surrounding areas, and provide smooth development of key projects such as Qinglan Expressway and Central and Southern Railways and economic development in the power supply area. Effectively support the support, while providing a strong guarantee for the safe and stable operation of the company's power supply equipment and power grid.
The company attaches great importance to this capacity expansion project. In the early stage of the project, it assisted the construction unit to prepare a careful construction plan for the site hazard source and key points, and organized transportation inspection, safety, dispatch, operation, maintenance, secondary, automation and so on. The departments carefully reviewed the construction plan and implemented the power supply load reversal and emergency plan for the relevant distribution network and high-risk users in Jixian, Xiangning and Qidu before the power outage. The Ministry of Construction earnestly implements the spirit of the documents of the previous meeting, strengthens the management of the external construction personnel, and strictly handles the procedures for the commencement of construction, strictly checks the five basic conditions for returning to work, and ensures that the on-site construction personnel, (identity) certificates, and (guarantee) risks are consistent. , to eliminate various safety hazards during the construction process in advance.
During the construction process, the management department will arrive in time to strengthen the on-site safety supervision, carry out key prevention and control on the dangerous points on the site, and randomly check the on-site personnel to ensure that the entry construction personnel are consistent with the ticket face and the operation behavior is standardized. All professional rooms and supervision units strictly check the process acceptance to ensure that the construction quality of each link meets the requirements of the regulations. After daily work, the on-site general coordinator summoned the heads of various management departments and professional departments to summarize and comment on the progress and problems of the day, and rationally arrange the next day's work and mission plan to overcome the adverse effects caused by weather and other factors. To ensure that all work is carried out in an orderly manner.
At present, the main accessories such as the No. 2 main transformer body and the radiator casing have been installed in place, and the main transformer vacuum injection and various commissioning tests are being carried out in an orderly manner. In the next step, on-site management personnel will be strictly in place to strengthen their daily management, continue to effectively implement the “one program, one measure, one ticket†in the construction process, adhere to the daily work report system, and urge all relevant units to perform their duties. Responsible, in strict accordance with the requirements of the "five connections and one measure" of the State Grid Corporation, to control the safety of the project and the quality of construction, to ensure that the No. 2 main change was successfully put into operation before the end of April.
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