Research Background

With the large-scale construction of high-speed railway, the popularization of rail transit in the city, the mass construction of electric vehicle charging stations, these power consumption equipment have decentralized, high-power and power flow rapidly and greatly changing features , the stability of the power supply network is facing severe challenges.At the same time ,electric vehicles comprehensive popularization also poses new challenges for the corresponding research and development enterprises .In order to deal with the above problems, universities and research institutions have invested a lot of money in the simulation and test experiments of electrified traffic. The common experimental methods include scaled physical model, computer virtual model offline simulation, and HIL model real-time simulation. Their respective characteristics are as follows:

● scaled physical model experiments: since the scale of electrified traffic is generally at the city level, the investment for physical experiments is huge, and the construction cycle is very long, which also has higher requirements for the laboratory site. It may also occur that the built laboratory is not suitable for new projects and needs to be expanded, and with low flexibility;

● offline simulation experiment of virtual model using computer: there are problems such as long single simulation time and high time cost of changing working conditions. In addition, due to some requirements of electrified traffic for communication, offline simulation using computer cannot accomplish all simulation goals;

● real time simulation experiment with HIL model: it can not only flexibly solve the simulation problem of large-scale power grid changing working conditions in real time, but also simulate the communication equipment.

Thus it can be seen,HIL simulation is a better selection for solve simulation of electrified traffic.

StarSim HIL Simulation Solution

Challenge

There are some challenges of electrified traffic HIL Real-Time simulation:

1. Large simulation scale,requires simulator has large Electronic Component simulation quantity;

2. There are massive number of working conditions and fault types,it’s hard to test and verify all conditions in single test;

3. Electrified traffic simulation requires lots of electric motors or different kinds of motors,even non-linear motor;

4. Power supply grid parameters needs to change during simulation runtime,because the impedance of rail way power supply grid is changing with distance;

5. No matter simulate EV or E-Rolling Stock,need long Simulation during time ,this requires a reliable computing platform( hours or even days);

6. Support specific Communication test, in order to certify timeliness;

7. Large number of converters result the number of variables is much larger,needs more I/O channels.

StarSim Solution

By using MT 8020 Real-Time Simulator ,can effectively solve all problems above:

1. Support large number of electric Component simulation.,and multi-device parallel simulate,the size of topology can be multiplicated;

2. By using Real-Time simulator, multi-type working conditions and faults can be tested and certified in a same simulation.The research and development time can be significantly shorten;

3. Support Tree-Phase/Six-Phase PMSM, AC motor, DC motor,BLDC motor, non-linear motor,linear motor;

4. Supports line parameters runtime change,help solve problems of transport line impedance change simulation;

5. Reduce simulation time cost:long time simulation cost same time with the simulation setting time;

6. Support multi-type communications,such as CAN,serial,Modbus TCP/RTU,61850;

7. Rich physical I/O interfaces(MT8020 equiped with 96 digital input ports and 48 analog output ports),besides the number of I/O interfaces can be expanded.Meet most users need.