Cigre / IEC UHV Symposium, New Delhi 2009 1

Strategic Agenda for CIGRE‘s Technical Activities

Klaus Fröhlich

Challenges for the Electric Power Sector

• Environmental pressure– Energy sources of low or no CO2

– Public pressure on OHL‘s /ROW/EMF/Audible Noise

– Increasing frequency of extreme weather conditions

– Substitutes for various insulation materials (Oil, SF6)

• Changing customer demands– Increasing role of electricity in the total energy sector

– Access to electricity supply for all people/fast growth

– Changes of historic seasons pattern

– Load management /Vehicle to grid

Cigre / IEC UHV Symposium, New Delhi 2009 2

Challenges for the Electric Power Sector

(continued)

• Regulation, legislation and targets– Governments setting new rules (EMF ,CO2, fuel politics)– Security of supply

• New and developing technologies – energy generation / Energy storage/New Materials– New IT tools/methods for automation, control and diagnostics

• Maintaining and expansion of the electric power system– bulk power transmission in HVDC /UHV (backbones, source to

grid) – Ageing equipment– System stability and system security

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• Future network (considers transmission low voltage distribution)

– Implementation of intermittent renewable, dispersed sources– Use of energy storage– Automation, smart operation and control– Strengthen the transmission grid (UHV, HVDC), backbones, long distance

• Maintainence and upgrade of the existing system– Asset management and efficient use of assets– System operation and control for better stability– Implementation of new technologies/principles

(materials, apparatus, IT)– Consider electricity market issues

–

Main Strategic Directionsof the TC

Cigre / IEC UHV Symposium, New Delhi 2009 4

• Focus on environment and sustainability– Public acceptability

– System efficiency

– Environmental friendly materials

– New regulations, targets

–

Main Strategic Directionsof the TC

(continued)

Cigre / IEC UHV Symposium, New Delhi 2009 5

CIGRE’S KEY ROLES (FOR UHV)

• Prepare scientific technical background for the electric power sector and in support of IEC standardization

• Timely recognition of needs & engagement with all stakeholders – Users, suppliers, standardisation bodies . . . .

• Data gathering and analysis– International events, review of historical data & present

plans, working groups, publications

• Clear technical statements & recommendations

CIGRE ACTIVITY FOR UHV

MARK WALDRON

BEIJING 2007

• Response to the desire for UHV standards in short timescale

• Comprehensive stakeholder participation

• Establish common understanding of UHV history (40 yrs), issues and way forward

• Provide focus & priority for pre-standardisation technical investigations

BEIJING 2007

• Very successful!• Clear view of “problems to be solved”• Distinction between “standardization”

aspects (1100kV vs 1200kV) and technical investigations

• Clearer focus on:– aspects specific to UHV– common aspects with lower voltages e.g. prot’n– extrapolation vs new approaches

BEIJING 2007 KEY CONCLUSIONS

• Market demand (and equipment) for standardization exists

• Simple extrapolation by voltage rarely optimum

• Integrated design approach is critical

• Testing techniques and facilities require development (dielectrics, switching, pollution etc)

• UHVDC poses challenges for insulation systems, environment as well as “core” technology

CIGRE TOPICS FROM BEIJING (1)

• Investigation of switching phenomena– secondary arc quenching, transient recovery

voltages, dc time const’, opening resistors, disc’r & earth switch duties, OHL/Tx parameters

• Over-voltages & insulation co-ordination practices– Arrester characteristics, LIWV & waveshape

(6/250?), VFTO, suppression vs withstand

• Design & testing of UHV surge arresters– Energy handling, steep V-I designs

CIGRE TOPICS FROM BEIJING (2)

• Converter transformer reliability• Use of standardised voltages for UHVDC• Substation layouts and technology

– AIS/GIS/MTS, double busbar etc, maintenance & transport aspects

• Testing techniques (site & laboratory)– Site HV testing, scaling effects e.g. polymerics,

validity of existing techniques

CIGRE MAIN ACTIVITIES

• Participation in JICCG – roadmap to standardisation• Establish key working bodies

– A3.22 (substation equipment), B3.22 (substations), A2 advisory group (Tx), B3.34 (OHL), C4.306 (Ins’ co-ordination), A3.25 (Surge arresters) . . . . . .

• Targeted engagement in other areas e.g. B4 (HVDC) & D1 (test techniques)

• Forge working links with key users especially China & India

• Deliver timely recommendations

PROGRESS TO DATE• High priority aspects substantially complete

– State of the art & key recommendations delivered by A3.22, B3.22 with contributions from A2 AG etc

• Follow up activities where more detailed/focussed studies required (e.g. UHV arresters, transformer TRV’s)

• Longer term activities (e.g. insulation coordination, C4.306)

• Watching brief for new requirements/activities• Second International Symposium to consolidate &

update progress and identify outstanding issues• A success story!