Calculation method of power supply capability of power distribution system

Abstract

The invention discloses a calculation method of power supply capability of a power distribution system. The calculation method is characterized in that the 'N-1' safety criterion is adopted as the premise, the interconnection relation of a main transformer is adopted as the basis, the upper-lower level coordination relation of the power distribution system is fully considered, the influence of load transfer limit of medium-voltage connection and short-time overload of the high-voltage main transformer are considered, and the power supply capability of the power distribution system can be accurately estimated, so that the deficiency of the load supply capability estimation on quantity when the single voltage level is only considered is avoided; the limit of the whole load supply capability of the power distribution system can be accurately mastered, so that the planning and the construction of the power distribution system is guided; and when the regional load increases in certain degree, the requirement for load increase is met by discovering the power supply capability of the existing power supply facilities. According to the method, the limit utilization ratio of the power distribution equipment can be determined on the premise of meeting the safety of the system and reference for a supply transferring scheme can be provided when the equipment fails, thus the operation scheduling of the power distribution system is guided and the method is beneficial to the effective use of the power distribution system facilities in power supply enterprises.

Description

technical field [0001] The invention relates to the field of power distribution systems, in particular to a method for calculating the power supply capability of a power distribution system. Background technique [0002] After a long-term transformation and construction of my country's power grid, the power transmission system has become increasingly perfect, which makes the planning and operation of the distribution network more and more concerned. In recent years, with the rapid development of the national economy and the rapid growth of power load, users have higher requirements for power supply capacity, power supply quality and power supply reliability, and even energy conservation and environmental protection. In order to plan the distribution network more objectively and systematically, the scientific evaluation of the performance of the distribution system becomes crucial. The traditional evaluation method pays more attention to the reliability of the distribution n...

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Problems solved by technology

However, the model of the above method has a relatively rough abstraction of grid structure and load supply problems, and there is still a certain gap with the actual operation of the power grid, which cannot strictly reflect the load transfer situation of the actual power grid.

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