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.
ABB’s Mission to Zero drives South Africa’s energy transition ABB Electrification Products
Power Electronics / Power Management
ABB Electrification is charting a bold path towards a net-zero future with its Mission to Zero programme, a blueprint that combines energy efficiency, electrification, and digital innovation to accelerate the transition to clean energy.
Read more...Energy harvesting using a battery-less IoT system NuVision Electronics
Editor's Choice Power Electronics / Power Management
Energy Harvesting plays an essential role in the foundation of ambient IoT, a new generation of ultra-low power connected devices that operate by drawing energy from their environment instead of relying on traditional batteries.
Read more...Driving power, defining performance Future Electronics
Power Electronics / Power Management
Vishay’s portfolio of inductors, current sense resistors, and MOSFETs provides a comprehensive solution for intelligent power management.
Read more...Battery simulator module simplifies BMS testing Test Dynamics
Power Electronics / Power Management
The PXI/PXIe solution from Pickering Interfaces offers a scalable, modular design for faster development cycles, lower total cost of ownership, and improved safety.
Read more...DC PSU: The cornerstone for efficient solar-storage systems Vepac Electronics
Power Electronics / Power Management
PV energy storage systems are evolving and DC power supplies, with their technical characteristics that are naturally compatible with new energy, have become a key carrier for improving system energy efficiency.
Read more...Converter power modules for 48 V networks Altron Arrow
Power Electronics / Power Management
The economic and quality-of-life benefits of electrification is driving the adoption of HV to 48 V DC-DC conversion across many markets with 48 V power modules becoming more common.
Read more...The importance of power integrity Spectrum Concepts
Power Electronics / Power Management
[Sponsored] Behind every high-speed system lies the need for power integrity. Without it, even the cleanest signal paths become compromised.
Read more...Precise multi-vital sign monitoring Future Electronics
Power Electronics / Power Management
The AS7058 by ams OSRAM is an integrated multi-vital sign monitoring device, which provides a complete photoplethysmogram, electrocardiogram, body impedance sensor, and electrodermal activity sensor.
Read more...Automotive battery diagnostics tester Comtest
Power Electronics / Power Management
Midtronics’ MVT handheld battery tester is a revolutionary tool, powered by MDX-AI, which is set to redefine the standards of battery diagnostics and testing in the automotive industry.
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