Application of controX in locomotive performance testing

The AC transmission locomotive EMU traction performance test system project was developed by the relevant departments of the Ministry of Railways using the controX network version monitoring software. The system is required to complete AC locomotive tests, motor vehicle test and DC locomotive tests. By analyzing the electrical parameters of the converter and transformer at different speeds, the working conditions of the traction equipment are determined. This provides a scientific basis for the verification of new locomotives.
System architecture:

The system consists of two levels of networks: management level network and monitoring level network. The management level network includes a server node and six operation nodes distributed in the train compartments, connected via 100Mb Ethernet. The operation node is responsible for high-speed data acquisition, and the server node completes historical data storage, alarm processing and storage, event processing and other functions. The monitoring level network adopts the IEEE-488 bus widely used in the field of measurement and control. It transmits signals in a bit-parallel and byte-serial bidirectional asynchronous manner, with a maximum transmission speed of 1MB/s. The electrical parameter data of the equipment is collected from the NORMA D6000 power analyzer at high speed.

System features:

1) The working environment of the locomotive test system is relatively harsh. The high-speed train not only has a large vibration intensity, but also has serious electromagnetic interference from various high-power traction motors, traction converters and other electrical equipment. The network function of controX adopts a reliable connection method and adds multiple confirmation and anti-interference algorithms. It ensures the stable and reliable transmission of large amounts of data between nodes.

2) Support NORMA D6000 series instrument channel configuration, average configuration, sampling configuration, trigger source configuration, frequency measurement, memory configuration, harmonic parameters and motor parameter configuration.

3) The NORMA D6000 power analyzer used in the system is a high-precision and multifunctional power analyzer made in Switzerland. It can measure all electrical parameters (including waveform data and harmonic data). It is very complicated to use and set up at the same time. The manufacturer only provides the panel and stand-alone setting program for the setting method. Since multiple data need to be measured in one test, the tester has to run back and forth between the front and rear of the train. The locomotive test system can uniformly configure the instruments of each acquisition node on the server side. The data is transmitted to the acquisition node through the network, which improves the efficiency of the test system and greatly reduces the labor intensity of the tester.

4) Through the network function, other acquisition nodes can be operated from the server to switch the screen at will.

5) Support data block operation. During the test, it is necessary to record the waveforms of multiple characteristic points, such as the current and power factor of the converter. The system caches the waveform data in the instrument. After the test is completed, the server downloads the stored data blocks from the D6000 through high-speed Ethernet and the driver for test analysis and processing.

in conclusion:

The successful application of controX in railways, with its simple, flexible, convenient and fast configuration and operation, fast and effective data processing, comprehensive historical data record query, and good network functions, has greatly improved the accuracy of the test system and made the locomotive test system a model in railway automation engineering applications.