Mechanical Switched Capacitor (MSC/MSCDN)
- Description
- Details
- Benefits
- References
Mechanically switched devices are the most economical reactive power compensation devices. They are a simple and low-cost, but low-speed solution for voltage control and network stabilization under heavy load conditions. Their utilization has almost no effect on the short-circuit power but it supports the voltage at the point of connection. An advanced form of mechanically switched capacitor is the MSCDN (Mechanically Switched Capacitor with Damping Network) for avoidance of system resonances.
The MSC/MSCDN incorporates only passive components such as capacitors and reactors and can be connected directly to the high voltage busbar system or via a coupling transformer.
MSC – Mechanically Switched Capacitor
However, the effectiveness of voltage stabilization depends on the distance from the fault location. The MSC does not create any harmonics, but may interact with system harmonics.
MSCDN – Mechanically Switched Capacitor with Damping Network
As a more highly developed form of mechanically switched capacitor, the MSC with an additional damping circuit provides voltage support and in addition, it is insensitive to harmonics interactions.
The MSC/MSCDN can be operated in a controlled mode or manually.
The control system realizes, among other features, the following main control:
- automatic switching of the capacitor banks according to the need of the network system
- sufficient hysteresis is built into the control to avoid repetitive switching ("hunting")
- each capacitor bank can also be manually switched on and off
- remote (Dispatch Center) and local (Substation) mode of operation
The MSC/MSCDN offers various benefits for transmission systems, such as
- Voltage control
- Reactive power control
- Improvement of AC network stability
- Prevention of voltage instability
- Simple and effective compensation method for the grid
- Compact design to fit in limited space
- Filter for system harmonics
Siemens provides the adequate solutions for all kind of challenges
for today and in future for efficient power transmission with high
reliability and availability by low investment cost.
Since 1980, the proven Siemens FACTS technology has successfully
provided numerous comprehensive power solutions to customers all
over the world.
Take a look at our superior experience with MSC /MSCDN projects:
| In Operation since ... | Country | Project | Application |
|---|---|---|---|
| 2011 | France | RTE | MSCDN |
| 2006 | Spain | Benejama and Saladas | MSCDN |
| 2004 | Malaysia | Kuala Lumpur | MSC |
| 2003 | Saudi Arabia | SEC (Baish) | MSC |
| More: | MSC/MSCDN – Reference List |
Please use the following link for a overview of our references.