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Optimal dynamic grid stabilization

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SVC PLUS (STATCOM)

Whenever an innovative and universally applicable solution for grid enhancement is required, SVC PLUS provides the ideal solution. Our advanced STATCOM (static synchronous compensator) with modular multilevel converter (MMC) technology provides additional benefits compared to conventional solutions for reactive power compensation. While conventional SVC installations already provide a highly dynamic solution for voltage regulation in the power grid, the modular multilevel system SVC PLUS is even faster and offers additional benefits. Siemens also offers mobile SVC PLUS solutions that support short-term grid changes and rapid restoration after severe incidents.

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Siemens SVC PLUS at a glance

The fastest dynamic voltage stabilizer

SVC PLUS combines the benefits of static synchronous compensation (STATCOM) and modular multilevel converter technology with an optimized amount of components.

Despite its outstanding performance, SVC PLUS requires relatively few system components, which simplifies the design, planning, and engineering of new projects. The components used for SVC PLUS comprise proven and robust components such as industrial class insulated gate bipolar transistors (IGBT), reactors, capacitors, and in utility applications AC power transformers.

Thanks to modular multilevel converter (MMC) technology our SVC PLUS offers great flexibility regarding design and layout of converters and substations. The modularity and the low number of system components also reduce commissioning time compared to complex conventional SVC systems.

Better control for power grids, better load compensation

Depending on your needs, Siemens provides the right solutions for grid stabilization and load compensation of any scope. The portfolio comprises the conventional STATCOM and the advanced SVC PLUS in manifold combinations, and the mobile SVC PLUS systems that can be moved to any place in short time.

Small footprint, huge performance

The SVC PLUS is an advanced STATCOM (static synchronous compensator). By using the voltage-sourced converter (VSC) technology based on Siemens modular multilevel converter (MMC) design, it offers high economical and technical flexibility by its modular design. The footprint of an SVC PLUS installation is smaller than a conventional SVC installation of the same rating, by up to 50 percent.

Best of both SVC worlds

In order to extend the symmetrical operating range of SVC PLUS solutions, Siemens developed the hybrid STATCOM, which allows asymmetrical operating ranges thanks to the additional thyristor switched reactor (TSR) or thyristor switched capacitor (TSC). The hybrid STATCOM doesn’t generate additional harmonics, so no filters are required.

Grid stabilization – anywhere, anytime

The mobile STATCOM is Siemens’ multi-tool for transmission grids that enables temporary grid support and grid resilience against emergencies. The preconfigured SVC PLUS container combines major components in one housing and enables “plug and play” cable interconnection. A reactor container that contains the reactor coils including conventional bus bar arrangement complements it. The mobile STATCOM is the optimal solution for rapid service restoration after severe incidences, line rework, and grid changes, for example during power plant shutdowns.

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Smallest footprint for load compensation of medium size industrial plants

The SVC PLUS is an advanced STATCOM (static synchronous compensator). By using the voltage-sourced converter (VSC) technology based on Siemens modular multilevel converter (MMC) design it offers high economical and technical flexibility by its modular design. The footprint of an SVC PLUS installation is smaller than a conventional SVC installation of the same rating, by up to 50 percent.

The "small solution" offers the right load-compensating performance for medium-size industrial plants: excellent voltage stabilization provides the best preconditions for stable production, securing power quality parameters secures hassle-free connection to the public grid.

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Load compensation for large industrial plants or for weak grid connection

More and more often, the necessity arises to set up industrial plants with large fluctuating consumers in regions with weak electrical infrastructure – the most prominent example is the electrical arc furnace for melting scrap steel: Extreme variation of electric power consumption combined with generation of harmonics characterize the behavior of this consumer of electric power. Maintaining power quality parameters on the other hand is often a precondition to connect such a plant to the public grid. This constellation calls for a compensation system of highest performance.

To achieve this task, filter circuits are added in parallel to the multilevel converter (MMC) as in the SVC PLUS Compact to fully and optimally utilize the complete range of reactive power of the converter. 

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Load compensation of the largest industrial loads

The hybrid SVC PLUS is the Siemens approach to the largest industrial electric consumers: Electric arc furnaces nowadays reach sizes in the 300MVA range – an extreme task also for the load compensation system. A combination of multiple SVC PLUS converters, in combination with a classic SVC where required, is the concept of choice, that also offers best results in flicker reduction and improvement of other power quality parameters.

References

FACTS solutions all over the world

Siemens is active on all continents. With references worldwide Siemens has proven experience with all global environmental challenges. With FACTS projects executed up to the highest voltage level over the whole FACTS portfolio Siemens can call itself a world market and technology leader.

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Be in control

Optimal reactive power compensation

With SVC PLUS, Siemens further enhanced the capabilities of a static synchronous compensator (STATCOM) with modular multilevel converter (MMC) technology. Whenever your applications require a highly dynamic solution for voltage regulation, the modular multilevel system SVC PLUS is the right choice. 

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