- AG 1 Strategic Advisory Group
- AG 2 DC Grid Coordination
- AG 3 Communication and website
- AG 4 HVDC System Performance
- B4-58 Devices for Load flow Control and Methodologies for Direct Voltage Control in a Meshed HVDC Grid
- B4-60 Designing HVDC Grids for Optimal Reliability and Availability Performance
- B4-63 Commissioning of VSC HVDC Schemes
- B4-66 Implications for harmonics and filtering of staggered installation of HVDC converter stations in proximate locations
- B4-67 Harmonic aspects of VSC HVDC, and appropriate harmonic limits
- B4-68 Revision of Technical Brochure 92 - DC Harmonics and Filtering
- B4-69 Minimizing loss of transmitted power by VSC during overhead line fault
- B4-70 Guide for Electromagnetic Transient Studies involving VSC converters
- B4-71 Application guide for the insulation coordination of Voltage Source Converter HVDC (VSC HVDC) stations
- B4-74 Guide to Develop Real-Time Simulation Models (RTSM) for HVDC Operational Studies
- B4-75 Feasibility Study for assessment of lab losses measurement of VSC valves
- B4-76 DC-DC converters in HVDC Grids and for connections to HVDC systems
- B4.72 DC grid benchmark models for system studies
- B4/B5-59 Control and Protection of HVDC Grids
- JWG A3/B4.34 Technical requirements and specifications of state-of-the-art DC switching equipment
- JWG B4/B1/C4.73 Surge and extended overvoltage testing of HVDC Cable Systems
- JWG B4/C1.65 Recommended voltages for HVDC grids
- JWG C2.B4.38 Capabilities and requirements definition for Power Electronics based technology for secure and efficient system operation and control
- JWG C4/B4.38 Network Modelling for Harmonic Studies
B4-66 Implications for harmonics and filtering of staggered installation of HVDC converter stations in proximate locations
Several ongoing and proposed HVDC projects consist of two near-identical transmission connections, between identical or proximate AC connection points, but staggered in installation date, perhaps by several years. This delayed installation of the second transmission is typically done in order to match transmission capacity to the build-up of generation capability or load growth.
Many technical aspects of the close location of converter stations have already been covered in the work of WG B4.41 and the resulting Technical Brochure 364 on “Systems with Multiple DC Infeed”. However, intentional and planned staggered installation of stations with identical or near identical HVDC schemes being connected in close proximity to each other poses some different issues, particularly in the area of harmonics and filtering. Such issues include:
• Specification of harmonic limits at the time of the first installation which will also permit the connection of the anticipated second station without breaching regulatory limits.
• The validity of the recommendations in IEC 61000-3-6, Chapter 9 need to be examined.
• The transfer of harmonics between LV-MV-HV and EHV may need to be considered.
• Consideration of harmonic limits for joint operation, which may be different from the limits applicable to each station individually.
• Compatibility of filter designs to achieve fair sharing of harmonic load between stations
• Prevention of overloading of one station’s filters by the other
• Possible inter-changeability of filters from either station to enhance operational flexibility and increase redundancy.
|NAME||GIVEN NAME||COUNTRY CODE|
|Pires de Carli||Miguel||BR|
|Willcox de Souza||Luiz Felipe||BR|