Calculation Method of Optimal Operation Efficiency of Medium Voltage Distribution Line Considering Economy and Reliability

In view of the fact that it is difficult to reasonably measure the optimal load capacity of the line under different load structures by using the "$\mathrm{N}-1$" criterion in the current evaluation process of the operation efficiency of medium voltage distribution lines, it fails to fully consider the economics of line operation under different load structures., Proposed a calculation method for the optimal operating efficiency of medium voltage distribution lines considering economy and reliability. Firstly, the analysis ideas of the optimal operating efficiency of the medium-voltage distribution system based on the optimal load capacity are studied, and on this basis, the evaluation method of the operating efficiency is proposed; secondly, the reliability index and its reliability cost are analyzed and put forward The reliability assessment process of medium-voltage distribution lines with different load structures is analyzed; then, the operating economy is analyzed; finally, the optimal load capacity optimization model of medium-voltage distribution lines is constructed with the goal of optimal economy, and the mature Optimization tool to solve. Through the analysis of numerical examples, the validity and practicability of the method proposed in this paper are verified.