摘要
为深入研究大规模新能源基地经特高压直流向负荷中心远距离大容量送电的可行性及遇到的技术问题,一个有效的仿真平台是必不可少的。文章结合数字实时仿真及物理仿真各自的优势,以电磁暂态数字实时仿真系统HYPERSIM为研究平台,用直流输电物理仿真装置模拟外送风电的特高压直流输电系统,利用双向功率连接数模混合仿真技术模拟功率在数字和物理模型之间的交换,建立了大规模风电经直流外送的数模混合仿真系统。通过暂稳态仿真试验,对该仿真系统的动态响应特性进行了验证,解决了在模拟大规模风电接入电网的同时,精确模拟外送风电的直流输电系统动态响应特性的技术难题,为大规模风电接入电网及直流输电对大规模风电的适应性、交直流协调控制等研究提供了必要的手段。
To research the feasibility of long-distance massive power transmission from large-scale new energy base via HVDC transmission system to load center and the technical problems possibly occur during the transmission, an effective simulation platform is essential. Combining respective advantages of digital realtime simulation and physical simulation and taking electromagnetic transient digital reattime simulation system HYPERSIM as the research platform, the physical simulation device of DC power transmission is utilized to simulate＇the UHVDC power transmission system, via which the wind power is sent out, and the digital-analog hybrid simulation based on bi-directional power connection is utilized to simulate the powerexchange between digital and physical models, thus a digital-analog hybrid simulation system to research sending out large-scale wind power via UHVDC transmission system is established. Through transient and steady-state simulation the dynamic response characteristics of the established simulation system is validated, therefore, the technological problem of accurately simulating the dynamic response characteristics of UHVDC transmission system, via which the wind power is transmitted, when the grid-connection of large-scale wind farms is being simulated is solved. The established simulation system is suitable for the researches on grid-connection of large-scale wind farms, the adaptability of UHVDC power transmission to large-scale wind farms and AC/DC coordinated control.
出处
《电网技术》
EI
CSCD
北大核心
2013年第5期1329-1334,共6页
Power System Technology
基金
国家重点基础研究发展计划项目(973项目)(2010CB736204)~~
关键词
大规模风电
特高压直流
数模混合仿真
large scale wind farm
UHVDC
digital-analog hybrid simulation
