Help to Build the Zhengzhou-Jinan High-speed Railway

With the opening of Zhengzhou-Xuzhou high-speed railway, Zhengzhou-Jinan high-speed railway is also under intensive construction. We are very proud of the rapid development of national traffic as Chinese. More significantly, our products can contribute to HSR trains. We fell more proud and so good. As an individual, I am gratified that I can use my professional knowledge for the contribution to national development. We are very serious to our control modules which are the core control units of power generation. We should know that the bridge erector, weighing thousands of tons, is powered by a 300 KW genset.

At a certain section of the infrastructure of Zhengzhou-Jinan high-speed railway, the construction side gave us feedback about HGM6110N control module. Its oil pressure and water temperature fluctuate sharply when the genset is running and the data is not accurate.

Reason analysis The control module sensor com earths poorly or other electrical signals cause interference to it. After checking the situation at the scene, we found that the No. 40 terminal of the control module com is connected with the negative electrode of the charger. Because of the poor isolation performance of the switching power supply of the charger, the signal sampling of the sensor is disturbed (the sensor is resistance type and the resistance value changes when the negative electrode has voltage).

Solution Connect the control module No. 40 terminal to the grounding pile of the generator set separately, then the water temperature and oil pressure show normal and the problem is solved.

Safeguard Maritime Rights and Interests, SmartGen is in Duty Bound

China’s maritime territories is 2997,000 square kilometers, it is one third of the land territories, so the management is an arduous task and the road is long. As the saying goes, ” Good horse matches good saddle “, an advanced marine electric propulsion ship needs a reliable and stable power distribution system. The power distribution system includes: distribution board + generator set. There are systems that need two gensets to be synchronized before power distribution: manual synchronizing system and auto synchronizing system.

Manual synchronizing system Advantage: Stable performance. Disadvantages: 1.Cannot control the genset to start and stop; 2.The circuit is complex and there are too many connected devices; 3.The occupying space is large; 4.Operation is too cumbersome.

Auto synchronizing system Advantages: 1.Auto control the genset to start and stop; 2.High integration, small and simple connections; 3.Easy to check the gensets parameters; 4.Synchronizing operation is simple and intelligent. Disadvantages: 1.Poorer anti-interference performance; 2.Higher requirements for governor and voltage regulator; 3.Keep dry.

HMC9510 control module is designed for manual/auto synchronizing system generators with similar or different capacity. Additionally, it is suitable for single unit constant power output and mains synchronization. It allows automatic start/stop, parallel running, data measurement, alarm protection as well as remote control, remote measurement and remote communication function. It fits with LCD display, optional Chinese, English and other languages interface, and it is reliable and easy to use. Utilizing the GOV (Engine Speed Governor) and AVR (Automatic Voltage Regulator) control function, the control module is able to synchronize and share load automatically; it can be used to synchronize with other HMC9510 control module. HGM9510 control module also monitors the genset, indicating the operational status and fault conditions accurately. When abnormal condition occurs, it splits bus and shuts down the genset, simultaneously the exact failure mode information is indicated by the LCD display on the front panel. SAE J1939 interface enables the control module to communicate with various ECU (ENGINE CONTROL UNIT) which fitted with J1939 interface，connect the cockpit touch screen HGM9510-WL monitor through RS485 interface. This case is a 30m Chinese maritime vessel built by a shipyard. We got the feedback that power distribution cannot be achieved after the two gensets synchronize, the load of two sets fluctuates a lot. Then the customer used the HMC9510 synchronizing system, the synchronizing system was normal under light load. But when the ship was running at full speed, the generating voltage fluctuated between 350V and 420V.

Reason analysis Later, when troubleshooting problems, we found that the front stage of electric propeller driving by the back stage had a frequency converter. Because of the electrical characteristics of the frequency converter, the fluctuation of AC generating voltage, active power and reactive power would occur when the vessel was running at full speed, resulting in the uneven distribution under heavy load.

Solution Use the anti-high frequency interference voltage regulator and the problem is solved.

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