The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The increasing conducted interference caused by modern electronic equipment is causing more problems for electronic, or static, energy meters. These meters are called smart meters when equipped with a communication link, and are replacing the conventional electromechanical meters. It is known that conducted electromagnetic interference, for instance due to active infeed converters as used in photo-voltaic...
Conflicts of interest in determining permitted levels of EMI of electronic products between different standard committees result in a deadlock. In this context, the conventional approach used in defining the levels is not sufficient anymore to overcome contemporary EMI cases due to technology which rapidly advances. On the other hand, customers need to be protected by EMI standards which must adapt...
More often consumers are complaining about the energy bill after the conventional electromechanical meter has been replaced by an electronic, or static, energy meter. Active infeed converters for photo-voltaic systems are a known source for interference to static meters. To investigate the root cause experiments on static meters have been performed in a controlled lab environment. Three-phase meters...
When testing large stationary equipment for EMC compliance, on-site testing is often the only option. In case of a fixed mains connection, use of an artificial mains network is problematic. Within In the framework of an European Research project on EMI testing of large installations, research has been performed on the performance of new and existing alternative methods. While researching existing...
Communication loss in Power Line Telecommunication (PLT) caused by conducted electromagnetic interferences (EMI) is conventionally mitigated by replacing, changing, disconnecting or even by installing new equipment which means high cost. A different approach which uses information of cyclic short-time interference as a tool to replace the hardware approach is proposed in this paper. The concept uses...
Conducted interference caused by equipment connected to power supply networks, and the interference in these networks, is conventionally measured using (slow) scanning tuned electromagnetic interference (EMI) receivers. A voltage sensor which separates common mode and differential mode in a three-phase setup combined with a 8-channel digital oscilloscope allows measuring voltage and current via many...
Static, or electronic, energy meters are replacing the conventional electromechanical meters. Consumers are sometimes complaining about higher energy readings and billing after the change to a static meter, but there is not a clear common or root cause at present. Electromagnetic interference has been observed between active infeed converters as used in photo-voltaic systems and static meters. Reducing...
Modern photovoltaic (PV) installations are being installed in large numbers. Manufacturers are using different harmonized standards to show compliance with the legislative requirements such as the European EMC Directive. Their selection of harmonized standards is not based on adherence to (essential requirements of) the European EMC Directive, but more on what is most convenient, i.e. lowest cost;...
Modern so-called energy efficient equipment often draw current only during a very short period of the period of a power supply mains. This is causing unwanted non-sinusoidal and harmonic currents. In some cases even a single diode is used for rectification causing direct current (DC) in the mains supply. To reduce dissipation the semiconductor components switch very fast, which is causing interference,...
This paper explores the possibilities for an Electro Magnetic Compatibility Expert System. Three cases will be shown why an Expert System is useful in a modern working environment.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.