Wind farm modeling is an important research topic, but the traditional mechanism modeling method is difficult to get accurate models. However, performance of the neural network model is superior for identification and...
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Wind farm modeling is an important research topic, but the traditional mechanism modeling method is difficult to get accurate models. However, performance of the neural network model is superior for identification and approximation of complex nonlinear systems. Especially, the BP network has been widely and successfully used in the engineering field. This paper gives a brief introduction to the BP network, and the network model is used for modeling of wind farms to prove the feasibility of BP model in the field of wind power.
In this paper, an optimal design method is proposed to determine the PID coefficients for control discrete-time SISO LTI systems in order to improve the transient tracking performance. We analyzed the convergence of t...
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In this paper, an optimal design method is proposed to determine the PID coefficients for control discrete-time SISO LTI systems in order to improve the transient tracking performance. We analyzed the convergence of the scheme and its convergence condition is obtained in terms of the PID coefficients. Based on the model of a DC Motor, an illustrative example is given to demonstrate the effectiveness of the proposed technique.
Multiple voltage stability incidents show that system dynamic components have a great impact on voltage stability. This article mainly analyzes and summarizes the impaction on voltage stability based on the bifurcatio...
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Multiple voltage stability incidents show that system dynamic components have a great impact on voltage stability. This article mainly analyzes and summarizes the impaction on voltage stability based on the bifurcation theory caused by dynamic characteristics of main components in the power system such as load characteristics, generator characteristics, OLTC and Static Var Compensator (SVC).It Proposes that we should make full use of bifurcation theory to enhance the influent study of these dynamic elements on voltage stability and there is a key research direction for future that we select multiple parameters from dynamic components to do multi-parameter research on voltage stability using bifurcation theory.
the design of automatic test system based on VC++ implemented the communications between the spectrum analyzer and PC. USB-GPIB Interface board is used, USB with its unique advantages of strong anti-interference, high...
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According to the slow speed, low precision and low efficiency situation of the traditional detection method of the distribution of light illumination, a CCD-based detection method for the distribution of light ill...
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According to the slow speed, low precision and low efficiency situation of the traditional detection method of the distribution of light illumination, a CCD-based detection method for the distribution of light illumination is proposed,which is based on the study of the iHuminometer-based on light detection *** uses a CCD camera to photograph the light source energy distribution information,usmg an embedded system as the central processing unit,the light source energy distribution information is transformed into some specific luminosity value through the procession of the system software, by way of the establishment of gray - illumination model,use the illumination value to calibrate the image pixel gray value, access to the situation of the distribution of the illumination light source quickly, that finally to achieve the rapid detection of the distribution of light source illumination.
Arc furnace is highly nonlinear and nonperiodic systems, its model has a strong uncertainly, these features make the arc furnace electrode control more difficult and complex. The traditional PID controller is too depe...
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Grid-connected photovoltaic power system is not only related to solar battery and grid inverter technology, but also involves the system control and optimization problem. The research and improvement about control tec...
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Grid-connected photovoltaic power system is not only related to solar battery and grid inverter technology, but also involves the system control and optimization problem. The research and improvement about control technology play a vital role in improving the efficiency of the system and Realizing optimization grid. On the basis of considering about control requirements in grid-connected photovoltaic power system, the paper analyzes comprehensively the control technology about MPPT, grid of inverter and island detection. At last, the paper points out the research hotspots and development trend in each part.
GPS with a global, all-weather, continuous real-time three-dimensional navigation and positioning capabilities, has a broad application value and development potential. GPS receiver with C/A code has advantage of chea...
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By using BP artificial nerve network's error reversion transmission. Summing up various data of comprehensive logging can solve the problem of low accurate rate for identifying oil, gas, water zones. The software ...
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In this paper, a specific description of the principles and procedures about how to use PCA method is given, in the field of fault detection in industrial systems, based on the Tennessee-Eastman process. An improved P...
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In this paper, a specific description of the principles and procedures about how to use PCA method is given, in the field of fault detection in industrial systems, based on the Tennessee-Eastman process. An improved PCA method is presented and a more precise model of the principal component is established. The simulation results show that the improved PCA has better performance, effectively reduce the missed alarm rate and enhance the sensitivity and robustness of faults detection systems. This article also summarized the cases about other deficiencies and improvement of PCA method, such as nonlinearity, adaptation and so on, which provides the corresponding solution ideas and improved programs of research, using PCA-based fault diagnosis method in variety of different industrial objects.
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