A transformerless inverter is the latest product to supplement the Sinvert series of solar inverters from the Siemens Industry Automation division. Compared to units with transformers, the new three-phase photovoltaic inverters achieve efficiencies that are up to 2% higher; namely, 98% in a master-slave combination according to Euro-Eta.
System costs can be reduced with the option of a voltage window increased from 900 to 1000 V. In this case, for example, a number of photovoltaic (PV) modules are linked together in a chain and fewer generator terminal boxes and smaller conductor areas are needed. The new inverter series also includes units with graduated ratings of 500, 1000 and 1500 kW and also 2 MW.
The new central inverter units satisfy the currently effective medium-voltage regulations and can be used either as a standalone solution or in combination. The master-slave principle with ‘rotating master’ is an advantage in the event of changing intensities of solar radiation in the course of the day or in case of cloudiness.
Depending on the degree of radiation, the necessary inverters are energised or de-energised by means of a process whereby only the required number of inverters is operated subject to light intensity. The connection of as many as four inverters in the form of a master-slave system enables the plant to start already at low levels of solar radiation and to achieve very high efficiencies even in the low output range. The rotating master contributes to the long useful life of the system, as the inverter unit with the lowest operating hours is always controlled as master and therefore the operating time distributed uniformly among the inverters.
For more information contact Siemens, +27 (0)11 652 2000.
Reliable power solution Conical Technologies
Power Electronics / Power Management
The Mibbo MLD-120W-xxVx is a robust DIN-rail mounted DC-DC converter with a 120 W output capacity specifically designed for industrial and automation applications.
Read more...Easing the path for IPPs navigating local energy regulations
Power Electronics / Power Management
Independent Power Producers (IPPs) and developers venturing into South Africa’s renewable energy sector face an onerous and challenging regulatory landscape characterised by uncertainty in securing grid connections and considerable development costs.
Read more...Wide input voltage buck-boost converter Altron Arrow
Power Electronics / Power Management
The MAX77859 from Analog Devices is a high-efficiency, high-performance buck-boost converter targeted for systems requiring a wide input voltage range of between 2,5 and 22 V.
Read more...Development kit for TI’s SN6507
Power Electronics / Power Management
This comprehensive solution is designed to help engineers evaluate the performance of TI’s SN6507 transformer driver for isolated power supplies.
Read more...High-voltage IGBT Hi-Q Electronics
Power Electronics / Power Management
Diotec Semiconductor has launched the DIW030M060 IGBT, a 600 V, 30 A device with a built-in reverse diode.
Read more...DC converter for Hi-Rel applications Vepac Electronics
Power Electronics / Power Management
The MFK2812S from Crane Aerospace & Electronics is a DC-DC converter with an input voltage range of 16 to 50 V and an output of 12 V at up to 2,08 A.
Read more...Distributed Energy Resource Management Systems Schneider Electric South Africa
Power Electronics / Power Management
In addition to grid stability, DERMS also play a role in energy trading with some countries leveraging DERMS for real-time energy trading.
Read more...BYD introduces new energy storage solutions
Power Electronics / Power Management
BYD Energy Storage, a business division of BYD, has introduced the new BYD Battery-Box LV5.0+ at the recent Solar & Storage Live Africa in Johannesburg.
Read more...Micro energy harvesting
Power Electronics / Power Management
Panasonic Industry and Miromico partner to show effective micro energy harvesting for industrial applications.
printer friendly version