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On-line monitoring and analysis of low frequency oscillation (LFO) are important for stability and security of a power system. This paper proposes a blind source separation (BSS) based method for LFO modal analysis of one-channel measured signal, which consists of a second-order blind identification (SOBI) algorithm and the Hilbert transform (HT) technique. This is the first time when a BSS technique...
A model based on the Markov chain is proposed in this paper, which simulates steady-state variables of power systems to study the impact of the penetration of renewable energy generators (REGs). In this model, the power outputs of REGs are characterized by continuous time Markov chain (CTMC). In conjunction with the relationship between REGs' outputs and steady state variables, how these variables...
This paper presents a Group Search Optimizer with Multiple Producer (GSOMP) to solve the voltage control problem of the power systems penetrated with wind power. Although the utilization of wind turbines in power systems reduces the fuel cost and carbon emission efficiently, it also affects the reactive power flow, which might result in negative efffect on the power losses and voltage stability. In...
To improve power system stability in this paper, a method for optimal coordinate control of power system stabilizers (PSSs) and static synchronous compensator (STATCOM) is presented. The optimal coordinated control of multiple PSSs and STATCOM is transformed into an optimization problem in which both rotor angle speed deviation between generators and load voltages deviation after fault are involved...
For application in the magnetic field of joule balance at NIM, a dc-current source with 250mA for magnetic system, based on series compensation type, has been developed. Through designing the extraordinary sampling resistor, selecting stable voltage reference and operational amplifier with outstanding properties, the stability of this customized constant current source approached to 4.5×10−6/30min,...
The static voltage stability assessment (VSA) for a typical load center is discussed in this paper. Two indices are proposed for the static VSA of load centers. Moreover, the corresponding criteria are made for Beijing power system (BPS). A framework is developed in this paper to deal with the contingencies for the transmission interface and local generators which are critical to the static voltage...
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