Fast Frequency Response from Offshore Multi-terminal VSC-HVDC Schemes
نویسنده
چکیده
This paper analyses the frequency support characteristics of multi-terminal VSC-HVDC (MTDC) schemes using the energy transferred from wind turbine rotating mass and other AC systems. An alternative coordinated control (ACC) scheme, which gives priority to a frequency versus active power droop fitted to onshore VSCs is proposed to: (i) transfer wind turbine recovery power to undisturbed AC grids and (ii) allow correct control operation of MTDC systems during multiple power imbalances on different AC grids. The fast frequency response capability of MTDC systems equipped with the proposed ACC scheme is compared against a coordinated control (CC) scheme, which uses a frequency versus DC voltage droop. The frequency control schemes are demonstrated on an experimental test rig which represents a 3-terminal HVDC system. Also, the MTDC frequency support capability when wind farms do not provide extra power is tested using a 4-terminal HVDC system.
منابع مشابه
Design and Analysis of Dc Voltage Control of Multi-terminal Vsc- Hvdc Systems
DESIGN AND ANALYSIS OF DC VOLTAGE CONTROL OF MULTI-TERMINAL VSCHVDC SYSTEMS G.PURUSHOTHAM, S. FAHMEEDA PARVEEN, G.VENKATA SURESH BABU PG Student, 2 Assistant Professor, Associate Professor & HOD, Department of Electrical and Electronics Engineering SITS, Kadapa, Andhra Pradesh, India. _________________________________________________________________________ ABSTRACT: This paper discusses a mult...
متن کاملFrequency Support Using Multi-terminal HVDC Systems Based on DC Voltage Manipulation
This paper investigates the use of multi-terminal HVDC systems to provide primary frequency support to connected AC networks via coordinated DC voltage manipulation. Control schemes for multi-terminal HVDC systems to allow redistribution of active power, based on the idea of “power priority” are proposed. Inertia response from DC connected large offshore wind farms can also be incorporated base...
متن کاملPower Flow Solution on Multi-Terminal HVDC Systems: Supergrid Case
High Voltage Direct Current (HVDC) systems offer distinct advantages for the integration of offshore wind farms to inland grid system. HVDC transmission system based on Voltage Source Converter (VSC) enables multi-terminal use HVDC for the integration of large-scale wind power in the North Sea. That network requires a special formulation for power flow analysis as opposed to the conventional me...
متن کاملThe Effect of Grid Topology on Transient Fault Currents in Multi-Terminal VSC-HVDC Offshore Networks
This paper investigates different network topologies of potential future DC offshore grids with respect to their impact on transient fault currents for permanent single pole-toground faults. Investigations are carried out on a twelve-terminal ±320kV VSC-HVDC network modeled around the physical topology of the North Sea. Results are obtained through EMTP simulations in PSCAD using a detailed, fr...
متن کاملReview on Hybrid HVDC Technology for Integration of Offshore Wind Power Plant
VSC HVDC will be the most important approach for transmitting the power of large-scale offshore wind power plant in the near future. In recent literature, the feasibility of using hybrid type HVDC for offshore wind transmission has been discussed. A hybrid HVDC system has at one line commutated converter (LCC) at mainland and one voltage source converter (VSC) at offshore platform, which may in...
متن کامل