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.
Rugged railway-grade DC-DC power modules iCorp Technologies
Power Electronics / Power Management
iCorp Technologies has introduced the AIPUPOWER ZCD100 and ZCD150 Series, a family of rugged DC-DC converters designed to meet the demanding electrical and environmental requirements of railway and transportation systems.
Read more...Four-quadrant regenerative grid simulator Conical Technologies
Power Electronics / Power Management
The IT7900EP series high-performance regenerative grid simulator from ITECH is a full four-quadrant AC grid simulator capable of both sourcing and sinking power.
Read more...90 W PSU with 150% boost capability Brabek
Power Electronics / Power Management
RECOM’s cost effective REFIN2U-S90/CL DIN rail AC/DC boasts a 90 W rating with a boost capability of 150% for 4,5 seconds to allow for surge loads.
Read more...Standalone USB PD controller Future Electronics
Power Electronics / Power Management
The STUSB4531 from STMicroelectronics is a standalone USB Power Delivery sink controller designed to streamline the implementation of USB-C power negotiation in sink devices without requiring a full software stack on a host microcontroller.
Read more...MIL-Spec DC-DC power converters Vepac Electronics
Power Electronics / Power Management
PowerGood has introduced a range of 15 W to 600 W military DC-DC power converters engineered for mission critical defence applications.
Read more...Compact power MOSFET for high current switching Future Electronics
Power Electronics / Power Management
onsemi’s NTMFSC2D6N08X is a high-performance 80 V N-channel power MOSFET engineered for demanding switching and power conversion applications.
Read more...DC link capacitors for demanding applications RS South Africa
Power Electronics / Power Management
TDK Corporation has announced the B3271xP series of DC link film capacitors, offering high thermal robustness for demanding automotive and industrial power electronics.
Read more...N-channel power MOSFETs TRX Electronics
Power Electronics / Power Management
The TSM2N7002 series from Taiwan Semiconductor are logic-level N-channel power MOSFETs designed with low drain-source on-state resistance, reducing conduction losses and improving efficiency in switching applications.
Read more...Smart power protection, simplified TRX Electronics
Power Electronics / Power Management
onsemi electronic fuses (eFuses) deliver integrated, intelligent protection by combining overcurrent, overvoltage, over-temperature, reverse polarity, and inrush current safeguards in a single compact IC.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version