A planning method adapted to different stages of power grid construction based on reliability and economy

Abstract

The invention discloses a planning method based on reliability and economical efficiency and adaptive to different stages of power grid construction. The method comprises the following steps of: defining different stages of power grid construction; comprehensively comparing grid structures of a power grid, analyzing a transition process suitable for the grid structures of the power grid in different stages of power grid construction; selecting electric main connection forms of transformer substations of the power grid; and analyzing to obtain an optimized application strategy of a condition maintenance technology in different stages of power grid construction. The method provided by the invention provides technical basis for selecting rational grid structures and electric main connection forms of the transformer substations in the different stages of construction of a 35-220 KV power grid, simultaneously, guides all districts to effectively combine the improvement of network structures with the implementation of condition maintenance based on the stages and the characteristics of power grid construction, ensures that the power grid is maintained to be above certain reliability through rational measures and approaches, and has rational technical and economical efficiency.

Description

technical field [0001] The invention relates to the field of power grid planning and construction, in particular to a reliability and economy-based planning method adapted to different stages of power grid construction. Background technique [0002] The current power grid construction is in a period of rapid development. In many cases, the power grid is in the initial stage of development and transitional period. The load is very small, and the load growth in many places is slow. It may take 20, 30 years or longer for the load to develop to the saturation stage. . In general, with the gradual increase of load, the power grid is in the process of continuous development. In the initial stage of power grid construction and the development transition period when the target grid structure is not fully formed, the structure of the power grid may not meet the N-1 standard. In addition, in order to strive for site resources, power supply companies sometimes need to increase the cov...

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Problems solved by technology

In addition, in order to strive for site resources, power supply companies sometimes need to increase the coverage of the power grid at the initial stage of power grid construction under the circumstances of limited construction funds and low load demand. Therefore, during this period, the grid structure is relatively Weak, from the economic point of view, the construction of the power grid cannot be strictly implemented in accordance with the N-1 standard

Therefore, in the development and construction of the current power grid, due to the influence of technology, economy, environment and local policies, a considerable number of local power supply enterprises cannot fully implement the requirements of the guidelines in the development and construction of the power grid, making the current power grid construction unsatisfactory. It is possible to be N-1 everywhere and N-1 always

However, if the power grid construction is carried out in accordance with the requirements of the guidelines to meet the N-1 requirements in the initial stage of power grid development and the transition period, it will cause excessive investment, low utilization rate of equipment assets and even serious waste, which is not technically and economically feasible. Reasonable

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