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Flexible AC Transmission Systems (FACTS)

 

Product Types

 

Description

As a Transmission Grid Owner or Operator, are You facing any of the following challenges?     

 

Tasks of Reactive Power Compensation

FACTS are divided into two categories, determined by the way in which they are connected to the power system. A distinction is made between parallel (or shunt) and series compensation.

 

Parallel Compensation

FACTS are divided into two categories, determined by the way in which they are connected to the power system. A distinction is made between parallel (or shunt) and series compensation.

For these tasks, Siemens offers various solutions that have already been proven in numerous applications.

 

Series Compensation

The transmission of active power is mainly limited by the impedance of the transmission line, comprising the ohmic resistance plus the capacitive and inductive reactance.

For these tasks, Siemens offers various solutions that have already been proven in numerous applications.

 
 

FACTS range description

SHUNT FACTS - Static Var Compensators (SVC)

    SVCs are a fast and reliable means of controlling voltage on transmission lines. When system voltage is low, the SVC generates capacitive reactive power. Whan system voltage is high, the SVC absorbs inductive reactive power. 

 

Mechanically Switched Capacitor with Damping Network (MSCDN)

A developed form of mechanically switched capacitor with an additional damping circuit provides essential voltage support without increasing existing system harmonics.

 

SERIES FACTS Fixed Series Capacitors (FSC)

The simplest and most cost-effective type of series compensation is provided by the fixed series capacitor (FSC).

 

Thyristor Controlled Series Compensation (TCSC)

It is possible to control the current and thus the load flow in parallel transmission lines, which simultaneously improves system stability. Power oscillation damping and mitigation of sub-synchronous resonance can be realized.

 

Thyristor Protected Series Compensation (TPSC)

Conventional series capacitor use spark gaps and surge arresters for overvoltage protection. Due to the very short cooling time of thyristors valves, Thyristors Protected Series Capacitors can be quickly returned to service after a line fault, allowing the transmission lines to be utilized to their maximum capacity.