Series Compensation

The main purpose of using series compensation in a power system is virtual reduction of line reactance in order to enhance power system stability and boost the transmission capacity of existing and new transmission lines. Due to the deregulation of power market the existing transmission assets are to be utilized to the maximum extent to ensure efficient investment return. Simultaneously strong environmental awareness impedes construction of additional overhead transmission lines. Cost effective series compensation from NR can help system operator boost the transmission capacity of existing transmission system and also reduce the number of lines needed for greenfield power transmission projects so as to limit the impact to the environment.

NR series compensation solution consists of control and protection system, capacitor bank, MOV, spark gap, damping circuit, bypass breaker and insulation platform. NR provides the ‘all-in-one’ Turnkey solution for series compensation covering planning, design, supply, installation, commissioning, training and maintenance.

Series Compensation


  • Standardized, modular control and protection platform
  • Independent and redundant control and protection system
  • Electronic CT with improved anti-interference capability
  • Seismic design of platform according to IEEE 693
  • Reliable and field-proven primary equipment
  • Remote online monitoring and supervision upon request

Products and System

Case Study

FSC for Mozambique EdM Project

The Central-Northern transmission network of Electricidade de Mozambique (EdM) is operating close to its stability limits due to load growth and the expansion of several mines in the supply area. The increase in load will stress the supply network beyond acceptable limits (specifically with respect to voltage control). Additional short-term reinforcement of the system is therefore required. 3 FSCs are delivered by NR Electric to improve the system stability and increase transmission capacity. [View More...]


Combined with vast experience of project management and profound expertise of engineering know-how, NR Electric is able to provide ‘all-in-one’ turnkey solution of series compensation to customer.
  • Project Management
  • Consulting and System Planning
  • Conceptual & Detailed Design
  • Manufacturing & Testing
  • Engineering & Procurement
  • Site construction, installation
  • Onsite Testing & Commissioning
  • Operation and maintenance services