范心明.一种多风电场多端柔性直流输电的模拟电源控制[J].电测与仪表,2016,53(17):. FAN Xin-ming.A Power-Source Simulating Control of VSC-MTDC With Multiple Wind Farms Integrated[J].Electrical Measurement & Instrumentation,2016,53(17):.
一种多风电场多端柔性直流输电的模拟电源控制
A Power-Source Simulating Control of VSC-MTDC With Multiple Wind Farms Integrated
The voltage source converter (VSC) based multi-terminal HVDC (VSC-MTDC) is a superior scheme for the connection of wind farm groups. In this paper a power-source simulating control method is proposed and a star topology is used for VSC-MTDC connected multiple wind farms. The ac bus of the wind farm side VSC is modulated to a source node with constant amplitude, constant frequency and constant phase angle, thus the follow-up control of wind power is achieved. In the star topology, the wind farm side VSCs share a common dc transmission corridor and a dc bus of the VSCs is assigned as confluence node. A new direct current vector control method is applied in the grid side VSC to regulate the dc voltage to the reference value. The simulation of a three-wind-farm four-terminal VSC-MTDC system in PSCAD/EMTDC verifies the validation of the proposed control strategy and the feasibility of the topology.
