Control methodologies for direct voltage and power flow in a meshed HVDC Grid
Historically, HVDC (High Voltage Direct Current) technology has been used mainly for point-to-point transmission with one sending and one receiving converter station. Although the connection of more than two HVDC converters in a multi-terminal HVDC configuration is feasible, there are only a few multi-terminal schemes in service today. The need for integrating large-scale renewable generation, the electrification of oil and gas platforms from onshore grids, and the integration of markets has resulted in a demand for new transmission capacity and interconnectors. To meet these needs, more multi-terminal and meshed HVDC grids are under consideration.
The control of power flow, frequency control and voltage control in AC (Alternating Current) systems is well understood, and a similar control scheme will also be needed in HVDC grids. In addition, an HVDC grid cannot be controlled and operated independently of the AC system. The stakeholders of an HVDC grid, such as the TSOs (Transmission System Operators), regulators and other market players, are likely to require that the HVDC grid facilitates efficient and secure operation of the combined AC and HVDC systems.
This brochure provides the requirements and the classification of different control methods, including the coordinated system control, in order to ensure system security and efficient operation of the combined AC and HVDC system in an electricity market environment. In addition, a range of power flow controlling devices is described for efficient utilization of overhead lines and cables in the HVDC grid. The main focus for the technical brochure is on static control characteristics.
Control methods in HVDC grids is a technical area in development, and as such this technical brochure should be seen as a first attempt to provide the requirements, classification and description of different methodologies for direct voltage control, power flow control and coordinated system control in a meshed HVDC grid.
File Size: 2,2 MB
Pages NB: 2
You might also like
may download free of charge all publications including most recent ones
may download free of charge publications over three years old and purchase all publications
HOW TO ACCESS TO E-CIGRE?
Click here to read a short guide to setting up your account and obtaining access to the global e-cigre.org website for all technical literature.
Modelling of inverter-based generation for power system dynamic studies
Ageing high voltage substation equipment and possible mitigation techniques
Asset management for distribution networks with high penetration of distributed energy resources
Guide on use of premium efficiency IE3 (IEC 60034-30) motors & determining benefits of green house gas emission reduction
Recommendations for additional testing for submarine cables from 6 KV (UM=7.2 KV) up to 60 KV (UM = 72.5 KV)
Voltage Source Converter (VSC) HVDC for Power Transmission - Economic Aspects and Comparison with other AC and DC Technologies
Update of Service Experience of HV Underground and Submarine Cable Systems
Recommendations for testing of long AC submarine cables with extruded insulation for system voltage above 30 (36) to 500 (550) kV (This TB replaces electra article ELT_189_1)