摘要
针对两端VSC-HVDC系统结构和控制量特征,提出了一种实用的交直流混合系统潮流求解算法,算法效率高且不会影响原系统收敛特性;建立了以VSC与交流系统接口、直流侧输电系统以及控制系统为主要模块的机电暂态仿真模型,并提出基于小步长积分的动态特性精确模拟算法,与电磁暂态仿真结果对比,验证了模型与算法的有效性。交直流混联系统仿真表明,配置附加控制器后,利用VSC-HVDC快速功率可控性,可提高混联电网稳定特性。
Based on the features in the structure and controlling variables of two-terminal VSC-HVDC power transmission system, a practical algorithm to solve power flow in AC/DC hybrid power transmission system, which is high-efficient and does not affect on converge characteristic of original system, is proposed. An electromechanical transient simulation model, in which the interface of VSC-HVDC transmission system with AC system, transmission system at DC side and control system are main modules, is established and based on short-step integration an accurate simulation algorithm for dynamic characteristics is put forward. Through the comparison with electromagnetic simulation results, the effectiveness of the proposed model and algorithm is verified. Simulation results show that equipped with additional controller and by use of fast power controllability of VSC-HVDC transmission system both dynamic characteristic and stability of AC/DC hybrid power network can be effectively improved.
出处
《电网技术》
EI
CSCD
北大核心
2013年第4期1058-1063,共6页
Power System Technology
基金
国家电网公司大电网重大专项资助项目课题(SGCC-MPLG001-2012)~~
关键词
电压源换流器
柔性直流输电
潮流算法
收敛特
voltage source converter （VSC）
VSC-HVDCpower transmission
power flow algorithm
convergencecharacteristic
electromechanical model
small step integrationalgorithm
stability characteristic
additional controller
作者简介
郑超（1977），男，博士，高级工程师，研究方向为电力系统稳定与控制、高压直流输电，E-mail：zhengch@epri．sgcc．com．cn。
