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The phase compensation method was proposed based on the concept of the damping torque analysis (DTA). It is a method for the design of a power system stabilizer (PSS) to suppress local-mode power oscillations in a single-machine infinite-bus power system. This paper presents the application of the phase compensation method for the design of a DC/AC converter-based stabilizer to damp inter-area mode...
This paper presents the damping torque analysis of an energy storage system (ESS) control in a multi-machine power system. The objective of the analysis is to examine the effect of the ESS control on the power system small-signal stability. Firstly in the paper, a systematic procedure to establish a linearized model of the multi-machine power system with the ESS installed is presented. Secondly the...
The paper applies the method of the artificial fish swarm algorithm for the coordinated design of the PSSs in a real large-scale power system, in order to increase the damping of power system oscillations. The AFSA method is briefly introduced in the paper firstly. Then the optimized parameters of the PSSs are obtained by solving the objective optimization problem by using the AFSA method. Finally,...
In order to understand how an energy storage system (ESS) based supplementary damping control (stabilizer) suppresses power system inter-area oscillations, this paper proposes a tie-line power variation related ESS linearized dynamic model. This model describes the direct contribution from the ESS control to the small-signal variations (oscillations) of the tie-line power. Based on the model, a general...
This paper investigates power system small-signal oscillation stability as affected by a grid-connected SOFC (solid oxide fuel cell) power plant. It is demonstrated in the paper how the conventional and effective damping torque analysis can be applied to study the effect of the grid-connected FC (fuel cell) power generation on the damping of power system oscillations. It is concluded in the paper...
This paper presents a graphical explanation on the damping torque analysis (DTA) method. The explanation is established based on small-signal equal-area criterion of power system stability analysis. From the graphical explanation, a generalized approach for the analysis of damping effectiveness of power system control is proposed. An example is given in the paper to demonstrate how the generalized...
This paper presents a comprehensive survey on the research of a specific topic in power system engineering, power system oscillation stability and control by FACTS (Flexible AC Transmission System) and ESS (Energy Storage System). The paper firstly reviews the problem of power system oscillation. Then it addresses the issue of analysis of power system oscillation, focusing on two of most commonly-used...
This paper investigates the impact of a large photovoltaic (PV) penetration on power system small signal oscillation stability. A comprehensive model of a single-machine infinite-bus power system integrated with a PV power generation power plant is established. Numerical computation of damping torque contribution from the PV power plant is carried out, which is confirmed by the results of calculation...
This is the second part of the paper, presenting results of simulation tests of an example power system installed with a STATCOM-based stabilizer. Extension to more complicated case of multi-machine power systems is also discussed in this part.
STATCOM (static synchronous compensator) and SSSC (series static synchronous compensator) are two new generation of FACTS devices based on voltage source converter (VSC). In this paper, a novel analytical method based on the well-know equal-area criterion in studying their capability to improve power system oscillation stability is proposed and some useful analytical conclusions are presented. Simulation...
This paper investigates the feasibility of damping multi-mode oscillations by a single FACTS device with multiple damping controllers in a multi-machine power system. The nonlinear dynamic model and the linearized Phillips- Heffron model of a power system installed with a MUPFC (Multi-terminal UPFC) are derived. While MUPFC is a type of FACTS device as an extended UPFC (Unified Power Flow Controller)...
This paper investigates the feasibility of multi-mode oscillation damping by using a single UPFC (unified power flow controller). The UPFC can fulfil multiple control functions by implementing multiple controllers. Supplementary damping control can be superimposed on any normal control function to perform the task of damping control. Hence technically it is applicable for a single UPFC to damp multi-mode...
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