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By substituting the slow dynamic var compensator (such as synchronous generator) for rapid dynamic var compensator (such as SVC/SVG) in the static conditions, the rapid dynamic reactive power reservation can be significantly boosted. Therefore, the reactive power reservation can respond to the dynamic network disturbance more effectively. This paper proposes a quadratic programming based optimization...
This paper implements recursive least square method with variable forgetting factors (VFFRLS) in local real-time voltage stability monitoring scheme based on the application of Thevenin equivalent model and PMU to reform the existing methods which present weak performance in tracking the time-varying parameters of equivalent model for power system. The selections of variable forgetting factor and...
A new equivalent model based on phaser measurement unit (PMU) is proposed to analyze and predict the voltage stability of a transmission corridor. This equivalent model retains all transmission lines in a transmission corridor, which is more detailed and accurate than traditional Thevenin equivalent model widely used. To estimate parameters of the proposed model, Newton method or the least square...
A novel preventive control approach for mitigating the voltage unstable contingencies is proposed in this paper. The contingencies for which there are no post-fault equilibrium points are called unstable contingencies. The preventive control problem is decomposed into two sub-problems and solved iteratively and alternately. One sub-problem is that the stability bifurcation points in contingency parameter...
The classification, reasons and countermeasures of the computational failures of continuation power flow are proposed in this paper. The computational failures can be divided into the turning point failures and the non-turning point failures. The reason of the turning point failure is that the global parameterization such as arc-length or pseudo arc-length parameterization cannot overcome the singularity...
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