计及异步化同步发电机的电网可靠性评估模型

A Reliability Evaluation Model for Power Systems Incorporating Asynchronized Generators

通过对异步化同步发电机(ASG)和传统同步发电机(SG)励磁系统主要功能模块故障模式的分析,阐述了二者在不同运行方式下的马尔可夫状态转移过程,并据此建立相应的可靠性模型。在基于交流潮流的最优负荷削减模型中计及了ASG的有功与无功功率解耦控制特性以及SG的主要运行极限约束,比较了二者对电网可靠性的不同影响,并探讨了SG运行极限约束对系统可靠性的制约作用。通过对RBTS和IEEE-RTS79可靠性测试系统的评估分析,表明ASG对电网可靠性有明显改善作用。

Markov state transition processes for asynchronized generator （ASG） and conventional synchronous generator （SG） are presented by analyzing their different failure modes of the main functional parts of the excitation systems, and their reliability models are established respectively. In the optimal load shedding model based on the alternative current power flow, different influences on power system reliability are compared incorporating the active and reactive power decoupling control characteristic for ASG and the capacity limits for SG. The system reliability is studied when the practical operational constraints of SG are intensively considered. Finally, case studies using the RBTS and IEEE-RTS79 power systems show that ASG can obviously improve power system reliability.