© Siemens AG 2012

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RE10_00034

The inverters integrated in the inverter stations operate with a rotating master according to the master-slave principle.

The diagram shows in simplified form that the master moves to the next inverter each day (see left column). In actual fact, the inverter with the fewest operating hours is started as the master on the next day.

Master-slave system with SINVERT PVS

The SINVERT PVS inverters integrated in the inverter stations operate with a "rotating master" according to the master-slave principle. This is a master-slave system comprising between two and four interconnected inverter subunits. It employs an ingenious process to connect or disconnect inverter subunits, depending on the level of solar irradiation (determined according to the sun's path, cloud conditions, etc.). The mas- ter is started up first and operates even when irradiation levels are low. As irradiation levels increase, the next inverter subunit is switched in as a slave when a set switching thresh- old is exceeded. Depending on the configuration, up to three slaves can be switched in. As irradiation levels drop again, the subunits are disconnected in stages. One advantage of the master-slave principle is that the efficiency factor is higher when irradiation levels (which determine the PV generator output) are low than it would be if only a single inverter were used.

In master-slave systems, the "rotating master" function always starts the inverter subunit with the fewest operating hours as the master. In this way, the total operating hours are evenly distributed among all the subunits.

■Individual components of the inverter stations

–SINVERT PVS inverters according to IEC and their components (for further information see Catalog RE10 "Inverters and Components for Photovoltaic Installations")

–AC distribution for voltage supply, control and monitoring of the components.

–Medium-voltage transformer

–Medium-voltage switchgear

For technical data on the fully configured inverter stations, the AC distribution, the medium-voltage transformer and the medium-voltage switchgear, please contact your local sales partner:

www.siemens.com/sinvert/partner

Medium-voltage transformer

The medium-voltage transformer transforms the low voltage supplied by the SINVERT PVS photovoltaic inverter into a defined medium voltage of 20 kV, for example, for feeding into the grid.

Several medium-voltage transformer brands are available, e.g. the loss-optimized GEAFOL medium-voltage transformer (cast-resin two-tier transformer), which has been specially designed for photovoltaic applications.

Detailed information about GEAFOL medium-voltage trans- formers can be found in the Catalog TV 1 "GEAFOL cast-resin transformers 100 to 16 000 kVA".

Medium-voltage switchgear

The medium-voltage switchgear is available as an option. It distributes energy and feeds power into the medium-voltage network.

Detailed information about medium-voltage switchgear can be found in the Catalog HA 40.2 "Switchgear Type 8DJH for Secondary Distribution Systems up to 24 kV, Gas-Insulated".

SINVERT PVS in power plants 15

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Siemens 600 brochure Master-slave system with Sinvert PVS, Individual components of the inverter stations
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600 specifications

The Siemens 600 series represents a significant advance in the realm of industrial automation and control systems. Designed to meet the demands of modern manufacturing processes, this series is characterized by its robust performance, versatility, and high efficiency.

One of the main features of the Siemens 600 series is its modular design. This allows system integrators and users to customize their setups according to specific application needs. The modular architecture also facilitates easy upgrades and expansions, ensuring that the system can evolve alongside technological advances and changing production requirements. This flexibility is crucial for industries facing rapid shifts in market demands.

The Siemens 600 series is powered by advanced control technologies, including the Siemens TIA Portal (Totally Integrated Automation Portal), which streamlines the development process. The TIA Portal integrates various components within the manufacturing environment, enabling data exchange and simplifying programming tasks. This leads to increased productivity and reduced time-to-market for new products.

In terms of connectivity, the Siemens 600 series supports a range of communication protocols, such as PROFINET and PROFIBUS. These protocols ensure seamless integration with existing industrial networks, allowing for efficient data transfer and real-time monitoring of operations. With the rise of Industry 4.0, the ability to connect and communicate with other devices and systems is more critical than ever, and the Siemens 600 series excels in this regard.

Another notable characteristic of the Siemens 600 series is its focus on energy efficiency. By incorporating intelligent energy management features, the system helps companies optimize their energy consumption, leading to cost savings and a reduced carbon footprint. The integration of energy-efficient drives and motors further enhances the overall sustainability of manufacturing operations.

Moreover, the Siemens 600 series is built with a strong emphasis on safety and reliability. It complies with international safety standards, ensuring that both personnel and equipment are well-protected during operation. The series also incorporates features such as redundant power supplies and fault-tolerant designs to minimize downtime and maintain continuous production flow.

In summary, the Siemens 600 series stands out for its modular design, advanced control technologies, robust connectivity features, energy efficiency, and safety considerations. These characteristics make it a preferred choice for industries aiming to enhance productivity, streamline processes, and embrace the future of manufacturing. As technology continues to evolve, the Siemens 600 series is well-positioned to meet the challenges and demands of modern industrial environments.
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