摘要
电网的柔性互联受到越来越多的关注。基于晶闸管控制曲折变压器的新型柔性互联装置可用于同步电网的互联、配电网合环运行、电磁环网的柔性解环等等。首先针对系统大时间尺度的动态过程建立了该装置主电路的戴维南等效模型,结合自校正插值算法,在大步长的仿真计算时可以保证良好的准确性。进一步针对小时间尺度暂态过程,分别建立基于元件的和基于等效模型的仿真模型,证明了柔性互联装置的有效性和等效模型的正确性。对两种模型分别采用50?s和300?s的步长进行仿真,可知等效模型在两种步长下均具有良好的准确性,且其仿真时长分别仅为基于元件模型仿真时长的约14.5%和10.3%,计算开销显著减小。
Flexible interconnection of power grids draws more and more attention.The novelinter-connector based on thyristor-controlled zigzag transformer can be applied to the interconnectionof synchronous power grids,closed-loop operation of distribution networks,flexibly openingelectromagnetic loop,etc.The Thevenin equivalent model of its primary circuit with large time-scale isdeveloped and the self-tuned interpolation algorithm is adopted,guaranteeing the simulation accuracywith relatively large simulating step.Simulation models based on devices and equivalent model areboth developed for multi-timescale transform.The effectiveness of the flexible interconnector as wellas correctness of the equivalent model is validated.Simulations are implemented by the steps of50μsand300μs,respectively,using the two kinds of models.It is demonstrated that the proposed equivalentmodel shows satisfied accuracy under both steps.The simulation time consumptions are around14.5%and10.3%of the device-based simulation model,approving a sharply decreased computation.
作者
张春朋
姜齐荣
赵争鸣
Zhang Chunpeng;Jiang Qirong;Zhao Zhengming(State Key Laboratory of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University,Beijing 100084 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2017年第14期27-33,共7页
Transactions of China Electrotechnical Society
基金
国家自然科学基金重大项目资助(51490680
51490683)
关键词
柔性互联装置
多时间尺度等效模型
大步长仿真
Flexible interconnector
multi-timescale equivalent model
large-step simulation
