Baltic cable HVDC substation in Herrenwyk, Germany.

Insulation Co-ordination

Cigre has accomplished several important tasks on the way the development of more effective and reliable HV insulation, providing a significant contribution to the remarkable improvement of the performance of electrical power system achieved in the last decades.

- Assessment of lightning parameters for engineering applications, Modeling of lightning overvoltage propagation in transmission lines, Evaluation of fast transients in Gas Insulated Substations, etc.

Relay Protection and Local Control

- Numerical protection and substation automation: Cigre published the first feasibility studies on computer relaying around 1970, and has continued to contributed with work and with results that are now used as a basis for standardization.

- Cigre has throughout the years provided the protection engineer with practical guidelines for his daily work, in particular regarding test procedures and maintenance strategies to upgrade system reliability.

Telecommunications and Telecontrol

Cigre has contributed to the advancement of the discipline power system telecommunications among others by reporting on special telecommunication service requirement, an network contribution and maintenance and on telecommunications deregulation issues.

Guides were issued on Network planning, Mobile Radio network, Digital network planning, Telecommunications network management, Optical fiber planning for power utilities, etc.

Electromagnetic Compatibility

- Our work in the field of harmonic distortion in LV, MV and HV lines forms the basis even today of international standards on harmonic limits. Cigre has elaborated Volume V of the CCITT Directives concerning the protection of telecommunication lines against harmful effects of power lines.

- Our joint team of electrical doctors has contributed significantly to information and education on the subject of electromagnetic fields and their possible impact on human health.

Planning and Development of Power System

Cigre has played a central role in assisting the electric power industry to find the best solutions to adjust and accommodate changes, allowing electricity companies to increase their efficiency service to their costumes.

Cigre has successfully addressed the many faceted issue of planning: technical and economic analysis, evaluation of the impact of institutional change, definition of solutions to deal with environmental constraints. relation with decision makers in the energy field, analysis of the benefits afforded by new technologies, etc.

Power System Analysis and Techniques

- Application Guide on System Reliability Analysis: The concepts exploited lead to advancements with composite reliability evaluation and prediction.

- First test system for studying long term dynamics have been developed. These benchmarks, which have been well received by researchers and engineers, are used by electricity companies and research institutions to study new control concept, toll and components for the behavior in typical network adapted to special dynamic problems like island operation, voltage collapse, transient stability and damping of power system oscillations.

System Operation and Control

- The work of Cigre in measuring quality, security and economy of bulk electricity systems has been used in operational management. A data base covering many power systems during many years was set up.

- A world wide study on the organization of large interconnected systems addresses among other, the organization of frequency control, trade options, co-ordination of emergency plants etc. This work is of great benefit to systems developers and operators, considering the growing interconnection trend.