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| Mainova Aktiengesellschaft; Frankfurt am Main (Germany) | | Gradual Generation Change | Simocode pro motor management system improves plant operation in power stations
In the course of expanding the capacity, the power station of the Mainova Aktiengesellschaft in Frankfurt am Main received a modern Profibus-based electrical engineering in addition to new turbines. Ritter Starkstromtechnik supplied a medium and low-voltage switching system for this.
In the Frankfurt power station of the Mainova Aktiengesellschaft successively renewed technical systems generate electricity and heat for the district heating supply. The energy produced by the waste incineration plant is then "processed" and distributed according to requirements by a partner of the energy supply company. "This step allows us to control and monitor all the processes centrally and thus ensure optimum plant operation," power station foreman Norbert Polzin explains. However, the use of state-of-the-art measuring, control and regulating technology is a prerequisite.The dawn of a new generationFor building the new turbine 7 and the first two of a total four planned waste incineration lines, those responsible chose the Simocode pro Sirius motor management system. Stephan Haas, Division Manager for MSR/Electrical Engineering at FES, explains: "The remote controllability of all systems and the fast diagnostics and response speed are decisive for the degree of efficiency of the energy provision." The electric motors in the incinerator section are exposed to an extremely high thermal load for example. Therefore a functioning maintenance strategy is very important. At the same time a system was equipped completely with Profibus DP. Norbert Burckgard, electrical technician at Mainova, tells us the reasons for the decision: "Many, even small companies supply so-called GSD files (device master data) for their devices which are compatible with this bus system. This considerably simplifies the integration into the control." These GSD files are also available for Profibus-compatible Simocode pro devices which can communicate with up to three Profibus DP masters. In addition, Siemens supplies the Simocode ES software for convenient operation. This allows all operating, service and diagnostic data to be monitored centrally. A Simocode pro PCS 7 library also ensures simple, convenient integration into the Simatic PCS 7 process control system.Open software components simplify plant programmingThe biggest advantage of these software components in the opinion of Reiner Eckmann, Head of the Project Department of the electrical equipper Ritter Starkstromtechnik in Olfen, is their compatibility: "We prefer to install Siemens products because we can integrate their software easily into our programming." The reason: The manufacturer keeps his parameterization software consciously open. This puts plant manufacturers in a position to program the entire control technology themselves without extra costs.Flexible solution due to modular structureIn addition to turbine 7, an enormous air condenser, an evacuation system, offices and a new heat control room were built. The entire electrical engineering and control technology for these was installed by Ritter Starkstromtechnik in the form of a low-voltage switching system in withdrawable version with 122 panels and approximately 500 withdrawable modules which were equipped exclusively with Siemens low-voltage switching technology. All motor branches for pump or fan drives as well as the conveyor technology are controlled by the Profibus-compatible Simocode pro motor management system.Trial and error is passéThe versatile options of Simocode pro allow standardized withdrawable units to be assembled easily. These devices take over control or protection functions and offer a large amount of diagnostic information. In the Frankfurt power station for example, the control center detects the switch state of the device (on/off) and a possible test mode. In addition, the control center immediately receives information about the momentary motor current, any fault and an overload trip. Reiner Eckmann even goes one step further: "The possibilities of these devices are extended considerably by the operating hours and switching cycle counters integrated into the motor management as well as the cos-phi monitoring, the phase asymmetry detection and much more besides - which is really great." The wide use of the motor management system also alters the daily power station routine. The trial and error method whereby, in the event of a fault, the maintenance technician pulled out the withdrawable unit concerned and "tried out" the available reserve units until he got everything running again is now passé. Due to standardization and the direct connection to Profibus DP, the saved Simocode pro parameterization of the withdrawable unit concerned simply has to be loaded as a backup from the laptop. The maintenance technician can do this locally in no time with the Simocode ES software. Norbert Burckgard confirms: "This software is almost self-explanatory which makes it much easier to handle."Investment in the futureThat energy requirements will increase is a fact. For Mainova AG this means investing in new system technology which ensures a high level of availability. With the new switching system in conjunction with the Simocode pro motor management system they have certainly succeeded.Simocode pro motor management systemThe flexible, modular motor management system for motors in the low-voltage range makes an important contribution to the availability and reliability of plants in the Frankfurt/Main power station.- Protection, monitoring and control function for every motor branch- Avoidance of motor damage- Increase in system availability- Linking to the master automation system via Profibus DP- Simple data integration into the control- Convenient operation by the Simocode ES operating software- Central monitoring of operation, service and diagnostic data
Advance 3 / 2007 | |
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