用于静态安全在线评估的超导储能装置安装地点选择

LOCATION SELECTION OF SMES FOR ON-LINE STEADY STATE SECURITY ASSESSMENT OF POWER SYSTEMS

利用超导储能(SMES)技术进行电力系统静态安全在线监测和评估是该技术在电力系统中的一种新应用,SMES装置安装地点的选择至关重要。文中首先推导了特征值对于负荷变化的灵敏度计算公式,以此为基础,提出了基于灵敏度的子系统划分方法,获得了系统静态安全薄弱区域,并说明了静态安全薄弱区域内SMES装置位置选择的过程。最后以EPRI 36节点系统为例,通过在不同节点安装SMES装置,对比负荷变化时监测节点的频域响应曲线的变化过程,说明了该安装地点选择的正确性。

On-line steady state security monitoring and assessment of power systems based on superconducting magnet energy storage (SMES) is a new application of SMES technologies, in which the location of SMES device is quite important. An algorithm to calculate sensitivities of eigenvalues to loads is proposed, and then a method of partitioning power systems into subsystems is suggested to obtain the weak steady state security area of power systems. Afterward, the process of selecting the location of SMES as a disturbance source in the weak steady security area is investigated. Furthermore, trends of frequency response curves of the China-EPRI 36 buses system, with the variations of loads and different SMES installing places, are used to prove the validity of the selected location.