Bài viết Phương pháp tối ưu vị trí và dung lượng bộ nghịch lưu trong hệ thống cung cấp điện kéo đường sắt đô thị trình bày một phương pháp xác định vị trí tối ưu và dung lượng của các bộ nghịch lưu trong hệ thống cung cấp điện kéo cho các tuyến đường sắt đô thị. | Transport and Communications Science Journal Vol 72 Issue 5 06 2021 536-551 Transport and Communications Science Journal AN OPTIMIZING METHOD OF INVERTER LOCATION AND CAPACITY ON THE URBAN RAIL POWER SUPPLY SYSTEM Tran Van Khoi An Thi Hoai Thu Anh Dang Viet Phuc University of Transport and Communications No 3 Cau Giay Street Hanoi Vietnam ARTICLE INFO TYPE Research Article Received 06 01 2021 Revised 07 04 2021 Accepted 23 04 2021 Published online 15 06 2021 https Corresponding author Email Tel 0971385813 Abstract. Recovery of braking energy on the contact line to return to the medium voltage grid is one of the effective measures to recover renewable energy during the operation process. To achieve the greatest recovery efficiency besides the control mode the position and capacity of the inverters play a very important role. This paper presents a method for determining the optimal location and capacity of inverters in the traction power supply system for urban railway lines. The goal is to find an inverter placement that minimizes the total cost of power consumption and the investment costs of the inverters that provide the greatest economic benefits. The proposed method is implemented in two stages. The first stage applies the power flow algorithm to determine the energy consumption and recovered energy at each substation corresponding to the inverter placement cases in the operating modes. The second stage searches for the location and capacity of the inverters so that the total cost is minimal. The proposed algorithm is tested on the model of the power supply system according to the reference data from the Cat Linh - Ha Dong railway. The simulation results for the case of operating 11 trains the time from 5 00 to 22 00 daily for 10 years the cost when equipped with the inverters is billion VND compared to billion VND without using inverters. Simulation results show that the example system is .
