WebServices

As the basis for communication in the IEC 61850 standard the MMS protocol (manufacturing Messaging specification) for classic client-server communication used WebServices. In addition the proposal was submitted already, to include Web services communication protocol in the standard. Thus, Internet access come as a low-cost alternative in question. WebServices are already a recognized standard (W3C Consortium) and there is a uniform interface description by Web Services Description Language (WSDL). Development and test tools are already available. Opposite the IEC61850 via MMS, WebServices have a lower resource requirements in the control center because there are no permanent connections to build. WebServices of less are also complex, because without ISO/OSI protocols, as well as without ASN. 1 can be used.

It is possible even without third-party (licenses) to integrate in the telecontrol and control technology. Having to build any permanent connection alarm concepts the advantage of WebServices is also with a solution-related Disadvantage of powers. New methods must be found for the rapid transmission of fault information from the DEA. A solution proven in a field test, we present here as Alarm Server “. The concept is necessary because by the cyclic polling of DEA in the minute or every hour fault messages may not can be quickly transferred enough to the control center. Target is the fast forwarding of interfering signals without additional resource requirements in the network control center. The reporting provided for in the IEC 61850 standard is not suitable for this, since it requires a persistent connection to the control centre to the individual DEA. For this reason, the control room itself offers an IEC61850 Server service (alarm-server).

As pending to do this is to integrate a WebService client in the telecontrol gateway of the DEA. A malfunction in a DEA occurs now, she acts as IEC61850 client and uses the WebService Protocol to transmit the fault message to the control center. Communication gateway ACOS 700 in the test in a field test with about a hundred micro 80,0 is the fitness Equipment of communication gateways and the solution on the basis of Web services based on the IEC61850 standard in Germany tested. The fuel cells or even micro 80,0 serve the heating of detached houses and also power supply. The communication gateway ACOS 700 provides the interfaces for maximum of ten energy, gas and heat meters, based on the usual in the counter being M-bus as a wireline solution or wireless MBus, interfaces to the DEA. In addition, the gateway to electric I/O modules for additional information can be added. The remote data can be transferred via Ethernet (for example via DSL, Powerline) or via an internal GPRS module. In addition, the device has over a serial RS232 interface, allowing more peripheral devices can be connected. The focus of the test the suitability of the equipment and the simple integration of the solution into the network control system of multiple energy providers, the network control systems are different Manufacturers operate. Additional properties arising from the usage in private households and the demand after minimal effort for installation and putting into operation, are also in the focus of the field trial. Costs this procedure offers optimized device technology a viable technical solution for the transfer of monitoring and control information between DEA and network control systems of from different manufacturers. To use with the concept, the transmission protocol IEC 61850 via WebServices, opens up the chance for communication, commissioning and integration in the network control technology to keep costs to a minimum.