C# Based Supervisory Control Experiment System For Dynamic Simulation Of Urban Rail Transit Traction Power Supply

C# based supervisory control experiment system for dynamic simulation of urban rail transit traction power supply is an integrated supervisory control system developed on the background of dynamic simulation platform for traction power supply of urban rail transit(referred to as dynamic simulation platform).Dynamic simulation platform aims to simulate various operating conditions and fault states by establishing a physical model of the low-power rail transit traction power supply system.The supervisory control system builds a digital,high-efficiency,and strong-security comprehensive monitoring platform by organically combining various isolated devices of the dynamic simulation platform through the network and integrated software.Based on the actual construction situation and functional requirements of the dynamic simulation platform project,this paper designs and builds a safe,efficient,convenient and flexible integrated supervisory control system to ensure the normal operation of the platform and scientific research and teaching.The design adopts a layered and distributed C/S application architecture.The software design is divided into three levels: data interface layer,data processing layer,and man-machine interface layer from bottom to top.And the hardware design is divided into two levels: central monitoring layer and vehicle monitoring layer from top to bottom.The core control unit of the supervisory control system is DSP+CPLD,which forms an AC control unit together with the power supply board and the IPM drive board.It completes the collection of the underlying electrical quantities of the dynamic simulation platform,system software and hardware protection and fault recovery,and generate PWM drive pulses.For network formation and communication,H3C’s AP and AC equipment,TP-LINK’s router and switch equipment,and USR’s serial-to-Ethernet and serial-to-wireless network equipment are used to form a serial port-Ethernet-Wi-Fi communication network with multiple forms and multiple combinations.There are six functional modules in the dynamic simulation supervisory control system based on C#.The software and hardware implementation methods and functional verification results of each module are given in this paper.Data communication and display module realize TCP/IP-based Socket communication and host computer presentation of underlying information.The traction calculation module completes operation simulation and energy consumption calculation based on train and line conditions.The train operation control module realizes real-time monitoring of the train,which is divided into three parts: pre-start,normal operation with infrared positioning and operation protection.The mode selection is divided into test mode and debugging mode.The relay status in the system is tested respectively,and the bottom protection value and recovery value are debugged and modified.The remote firmware updating module performs one-to-one or batch programming to the bottom board of the platform through the host computer software.Other auxiliary functional modes include video monitoring,network settings,oscilloscope IP addresses configuration,and help interfaces.The supervisory control system expands its structure and functions to meet the needs of experimental teaching.A set of monitoring teaching platform with student client access and multiple operating modes are designed and implemented.On the hardware,the main control center is a dual-server operation mode,which interacts with the bottom layer of the platform and the student port respectively.On the software,a dual-mode(server-client)communication form is developed,and the system communication protocol is expanded.A total of four experiments including PI parameter adjustment experiment,cognition of urban rail transit system experiment,control effect of feedforward loop experiment,and control frequency change experiment were designed for the host computer operation interface,and their feasibility was verified through debugging.67 figures,6 tables,60 references.