Low Voltage STATCOM – Silcovar D

Dynamic reactive power compensation for distribution grid stability

Silcovar D low voltage STATCOM offers dynamic reactive power compensation to solve distribution grid voltage problems.

In electrical power distribution networks it is essential to rapidly and accurately compensate reactive power fluctuations and current unbalancing. Voltage stabilization of the grid improves Power Quality, increasing the power flow transferred to the load and enabling process optimization.

The Silcovar D is a low voltage STATCOM based on a VSC (Voltage Source Converter) platform, using IGBT technology that, thanks to its faster response time for reactive power control, ensures higher, steadier grid voltage.

Silcovar D enhances power flow and grid stability by injecting or absorbing reactive power in the electrical line.

Silcovar D

> Maximum rated voltage (transformer less solution): 0.655 kV

> Rated frequency: 50/60Hz

> Reactive Power rating: From ± 0.5 MVar to ±10 MVar

> Switched frequency: 2kHz

> Cooling: forced ventilation/Water

Medium Voltage STATCOM – Silcovar H

Dynamic reactive power compensation for grid stability and flicker mitigation

Silcovar H medium voltage STATCOM offers the best shunt dynamic reactive power compensation for improving transmission grid-voltage regulation, power factor/harmonic compensation, and flicker mitigation.

In electrical power transmission, fast dynamic reactive shunt compensators can significantly enhance the power transmission capability of the power system. Specifically, the voltage regulation at particular intermediate points limits voltage variations, prevents voltage instability (voltage collapse), and increases transient stability limits, whereas appropriate variations of voltage can further enhance transient stability providing effective power oscillation damping (dynamic stability).

In addition, for heavy industries such as Melt Shop with Electrical Arc Furnace, the fast dynamic reactive shunt compensator allows the operator to mitigate load unbalancing during the melting phase, increase active power transfer to the EAF and reduce the flicker effect to its minimum value.

The Silcovar H is Nided Industrial Solutions’s state-of-the-art STATCOM solution using Modular Multilevel Converters (MMC) based on standard H-Bridge Power Module and Voltage Source Converter. This modular solution of the “basic power module” offers interesting benefits from a technical, economical and industrial point of view.

The complete system can be configured using any number of power modules to satisfy any voltage and power requirement. The modularity of the system allows for back-up operation by simply adding redundant power modules.

Moreover, the system has a multilevel waveform based on interleaved PWM and staircase modulation characterized by very low harmonic distortion even with low switching frequency: switching losses are reduced and no filters are needed on the a.c. side.

Silcovar H

>Maximum rated voltage: 35 kV *

>Rated frequency: 50/60Hz

>Reactive Power rating: up to 132 Mvar *

>Cooling: air or water cooled

>Format: cabinet, container or building solution

Static Var Compensator (SVC) – Silcovar C

Dynamic reactive power compensation for grid stability and flicker mitigation

The Silcovar C Static Var Compensator (SVC) is designed to decrease disturbances caused by changes in voltage fluctuations in the normal operation of transmission lines and industrial distribution systems.

Disturbances may be caused by line faults, non-linear components such as thyristor controls and rapidly varying active or reactive loads. A typical source for these kind of disturbances are electric arc furnaces and rolling mills.

Our SVC solutions are the right solution to reduce production breaks and expensive restart procedures. The SVC increases the productivity, reduces the heat losses and prolongs the lifetime of arc furnace.

SVC are also being used extensively in Transmission and Distribution to help booster Transmission lines, compensating eventual disturbances caused by renewable energy sources.

Silcovar C

> Power range: 2 – 250 MVAR

> Voltage: 1 – 35 kV

Thyristor Units for AC SAF

Thyristor unit specially designed to bring the system closer to unity power factor

Nidec Conversion thanks to its consolidated experience in the field of high current conversion systems, has specifically developed this solution to modulate the current to the SAF electrode in AC Submerged Arc Furnaces. Nidec Industrial Solutions can provide integrated current and electrode control through the ARTICS platform.

Single phase unit

> Rating 40kA max – 2400Vac max

> Up to 8 SCR in parallel

> Back to back connection

> Max unbalance current 1,10

> CTs for measurements on each branch

> Cooling: Forced Water