Optimal control method for overvoltage of 500kv cables and overhead hybrid lines

Abstract

The invention discloses a 500kV cable and overhead joint line overvoltage optimization control method which comprises the following steps: establishing a cable laying mode, a cable arrangement mode, a high-resistance configuration mode, an MOA configuration mode and a circuit breaker closing resistor mounting mode of a 500kV cable and overhead joint line; and then providing optimization control measures thereby. The 500kV cable and overhead joint line overvoltage optimization control method can meet the requirements of power grid enterprises for control on power supply safety, and also can meet the requirements for economical operation of the 500kV cable and overhead joint line. The optimization control method plays a favorable guiding role for wide application of 500kV cable and overhead joint lines in an urban power grid plan.

Description

technical field [0001] The invention relates to an overvoltage optimization control method for cables and overhead hybrid lines, in particular to an overvoltage optimization control method for 500kV cables and overhead hybrid lines based on five-element constraints. The invention belongs to the technical field of electrical engineering applications. Background technique [0002] With the continuous advancement of my country's economic system reform and industrial structure adjustment, the national economy has sustained, stable and healthy development, the demand for electricity has become increasingly strong, and the load density has increased day by day. The national "Twelfth Five-Year Plan" clearly proposes to develop UHV transmission technology, further expand transmission capacity, accelerate the construction of a modern power grid system, and improve regional backbone power grids. As the backbone grid in most areas of our country, the construction of 500kV power grid wi...

AI Technical Summary

Problems solved by technology

[0003] Due to the large capacitance of the cable relative to the overhead line, the application of the 500kV long-distance cable line in the power grid will cause the operating voltage of the power grid to increase, which may generate high overvoltage, thereby endangering the safety of the line and equipment, and affecting the stable operation of the power grid. have an impact

[0004] At present, the part of the relevant design regulations that involves line overvoltage is mainly for overhead lines, and the overvoltage research on long-distance, large-section high-voltage cable lines is relatively scarce, and there are only few research results in actual engineering applications. For 500kV cables and overhead lines There is still a lack of comprehensive, systematic and typical research on the overvoltage of hybrid lines

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