This paper introduces the functions of the thyristor controlled series capacitor(TCSC)compensation method in Flexible AC Transmission Systems(FACTS), such as to enlarge limits of transient and dynamic stability, as well as transfer power, mitigating the phenomena of sub-synchronous resonance(SSR)and system voltage collapse, The paper also gives comments to the operation principle and configuration of TCSC.

The defects of the assessment methods for traditional power system voltage collapse are analyzed. The necessity of conducting risk assessment of voltage collapse in electricity market environment is expounded, and an approach to assess the risk of power system voltage collapse is proposed, in which the probability and consequence of voltage collapse are comprehensively considered and the risk index is quantified,and the foundation to determine optimal operation mode is provided by giving consideration to both risk index and economic benefit.

Inverse-time undervoltage elements take advantage of load dynamics to optimize load shedding to prevent system voltage collapse.

If not detected quickly on large generators, this condition can trigger an area-wide system voltage collapse.

Another key factor that results in rapid system voltage collapse is the nature of the loads that are being served by utilities.

This paper introduces the functions of the thyristor controlled series capacitor(TCSC)compensation method in Flexible AC Transmission Systems(FACTS), such as to enlarge limits of transient and dynamic stability, as well as transfer power, mitigating the phenomena of sub-synchronous resonance(SSR)and system voltage collapse, The paper also gives comments to the operation principle and configuration of TCSC. Finally, the paper introduces a project as an engineering practice for the large interconnected power...

This paper introduces the functions of the thyristor controlled series capacitor(TCSC)compensation method in Flexible AC Transmission Systems(FACTS), such as to enlarge limits of transient and dynamic stability, as well as transfer power, mitigating the phenomena of sub-synchronous resonance(SSR)and system voltage collapse, The paper also gives comments to the operation principle and configuration of TCSC. Finally, the paper introduces a project as an engineering practice for the large interconnected power network.

A computer package-NETOMAC developed by Siemens power transmission and distribution group is used to analyze system voltage collapses in time-domain. The components, which significantly affect the voltage stability, are modeled in detail with the NETOMAC controllers in the simulation process. The advantage of NETOMAC is that it can simulate nearly all dynamic elements such as various loads, controllers, governors and regulators in the system and nearly there is no bus number limit. Furthermore,...

A computer package-NETOMAC developed by Siemens power transmission and distribution group is used to analyze system voltage collapses in time-domain. The components, which significantly affect the voltage stability, are modeled in detail with the NETOMAC controllers in the simulation process. The advantage of NETOMAC is that it can simulate nearly all dynamic elements such as various loads, controllers, governors and regulators in the system and nearly there is no bus number limit. Furthermore, it can show the power angle and voltage profiles at the same time by which the factor of voltage collapse whether caused by angle or voltage instability is observable. For illustrative purpose a test system from CIGRE is applied to NETOMAC and the results are promising.

The defects of the assessment methods for traditional power system voltage collapse are analyzed. The necessity of conducting risk assessment of voltage collapse in electricity market environment is expounded, and an approach to assess the risk of power system voltage collapse is proposed, in which the probability and consequence of voltage collapse are comprehensively considered and the risk index is quantified,and the foundation to determine optimal operation mode is provided...

The defects of the assessment methods for traditional power system voltage collapse are analyzed. The necessity of conducting risk assessment of voltage collapse in electricity market environment is expounded, and an approach to assess the risk of power system voltage collapse is proposed, in which the probability and consequence of voltage collapse are comprehensively considered and the risk index is quantified,and the foundation to determine optimal operation mode is provided by giving consideration to both risk index and economic benefit. The assessment results for 6-bus system and IEEE 30-bus system show that the proposed approach is feasible and effective, and the risk assessment software of voltage collapse programmed by this approach is practicable.