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The objective of this paper is to identify a synchronous generator's internal voltage, dq-axis reactances using Phasor Measurement Unit (PMU) data obtained at the terminal bus of the generator. Our approach is to firstly classify the PMU data into inputs and outputs and then identify the relationship between the inputs and the outputs. With different classifications and different assumptions on salience,...
This paper proposes a novel robust cascade structure which has better performance when the transmission line undergoes a perturbation. Cascade control structure is normally used when the control procedure can be split into two (or more) cascaded parts. Compared with the conventional cascade control structure which has a limited ability to handle the perturbation in the plant model, the novel structure...
Voltage–current (V–I) droop control has been proposed for real and reactive power sharing. Compared with the conventional droop control using real power/frequency and reactive power/voltage, it enhances stability since adding a V–I droop is equivalent to providing a resistor. However, for a system with parallel converters with V–I droops, oscillations are observed when small droop coefficients are...
This paper proposes a robust power system stabilizer (PSS) using Lyapunov Stability theory introduced in Optimization & Control in Power System class at University of South Florida. This research examines the robustness of the novel PSS in the synchronous generator connected to an infinite bus (SMIB) system under multiple operation conditions. After deriving the state space matrices of the linear...
In this paper, the wireless power transfer system based on magnetic-coupled resonators is modeled and optimized by using low-frequency integral equation solver. For the low-frequency transfer system, the mesh size after discretization is usually much smaller than the wavelength. Hence, the low-frequency solvers are proposed to model this kind of structures with tiny meshes. After the spiral resonators...
A MapReduce cluster is usually shared by multiple users or products, aiming at accelerating their own job. In contrast, the utilization of the cluster is the main concern for the system itself. MapReduce jobs are split into independent tasks during execution. However, in practice, the number of tasks per stage for each job and the system settings are often sub-optimal to support certain workload....
In order to study the impact of drivers' distance cognition difference on traffic safety in dynamic environment of daytime and night-time, a real road tests was carried out by asking 19 drivers randomly selected to percept the distances of obstacles with different distances and velocities on daytime and nighttime. The values of cognition are obtained by statistical methods. The distance cognition...
The ambiguity of GSM signals transmitted by GSM base stations has a pushpin-type and low side lobe, and it's no ambiguity at distance and Doppler-axis. It's very suitable as a illuminator source of passive radar. This paper presented a mathematical model of passive radar using two GSM base stations as the illumination source, simulated with extended Kalman filter algorithm and verified the feasibility...
In this paper, we discuss the seedling planting mechanism which is applied in transplantation of baccy, corn, beet, eggplant, tomato, cotton Conclusions Etc. A mathematic model of the seedling transplanting mechanism is established and the model is calculated & simulated with MATLAB. By means of this model, the analysis for the movement of the mechanism became Intuitive and visible. And this model...
In order to synthetically solve economic and risk issues for food production, researching optimization algorithm of food production??s forecast based on the gene expression program. Taking Shaanxi province??s food production as an example to solve some key issues in food production which are the uncertainty information processing, reliability criteria analysis, mathematical model of food production...
This Letter addresses the generalized cascade synchronization problem of discrete-time hyperchaotic systems. By choosing a general kind of proportional scaling error functions and based on rigorous control theory, we take the discrete-time Henon-like map as a example to achieve the generalized cascade synchronization. Numerical simulations are used to show the effectiveness of the proposed technique.
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