Description: 随着新的数学工具小波分析的实用化为基于NN负荷预测模型性能的改善提供了理论依据对于电力系统负荷非线性时间序列的辨识在预测方法研究中应给予重视在本文所用的基于小波原理和NN融合的预测原理是具有强的非线性时间序列的辩能力由研究和仿真表明它能有效提高预测的精度-with new mathematical tools wavelet analysis based on NN into practical load forecasting model to improve the performance of the rationale On the basis for the power system load nonlinear time series forecasting methods in literacy research should give importance to the use of paper Based on wavelet theory and NN fusion principle is the forecast of strong nonlinear time series by the dialectical capacity of research and simulation shows it can effectively improve the accuracy of forecasts Platform: |
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Author:bluebowl |
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Description: 随着新的数学工具小波分析的实用化为基于NN负荷预测模型性能的改善提供了理论依据对于电力系统负荷非线性时间序列的辨识在预测方法研究中应给予重视在本文所用的基于小波原理和NN融合的预测原理是具有强的非线性时间序列的辩能力由研究和仿真表明它能有效提高预测的精度-with new mathematical tools wavelet analysis based on NN into practical load forecasting model to improve the performance of the rationale On the basis for the power system load nonlinear time series forecasting methods in literacy research should give importance to the use of paper Based on wavelet theory and NN fusion principle is the forecast of strong nonlinear time series by the dialectical capacity of research and simulation shows it can effectively improve the accuracy of forecasts Platform: |
Size: 93184 |
Author:bluebowl |
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Description: 【摘 要】论文总结了ＣＤＭＡ通信系统功率控制的目的和方法，重点介绍了基于信噪比的功率控制算法，最后利用
ＭＡＴＬＡＢ工具，对开闭环结合的功率控制方法进行了仿真，给出了实验结果。
【关键词】
ＣＤＭＡ 功率控制 ＭＡＴＬＡＢ仿真
-Abstract paper summarizes the CDMA system power control method and the objective, focus on the signal-to-noise ratio on the power control algorithm, the final use of MATLAB tool outside the closed-loop power control with the simulation method, the experimental results are given. Key words : CDMA power control MATLAB Platform: |
Size: 346112 |
Author:古风 |
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Description: 本文首先介绍了有源电力滤波器的基本结构和工作原理，并对一些常规的谐波电流检测方法的优缺点进行了比较。其次，针对传统的谐波电流检测方法的缺陷，提出将神经网络与基于噪声抵消原理的自适应谐波检测相结合，利用径向基函数运算量小、收敛快、无局部极小值等优点，构造了一种基于径向基函数神经网络的谐波电流检测方法，仿真结果表明该检测方法具有很好的动态响应及畸变电流检测精度。最后，设计了一套实验系统，对本文所采用的系统方案进行了实验验证。仿真表明，本文所采用的有源电力滤波器检测系统方案切实可行，能够较好地实现动态检测谐波和无功功率的目的。 -This paper, firstly, introduces the basic structure and principle of APF, and then makes comparison among some conventional harmonics detections methods. Secondly, contraposes the limitation of the traditional harmonic current detecting method based on neural network, presents the method that combines the neural network and auto adaptive harmonic current detecting method based on the principle of noise each other eliminating.As the characteristics that are small calculative quantity, fast converge, without local minimal point of Redial Basis Function (RBF), this dissertation forms a new harmonic current detecting method based on RBF. The simulation results show that the method has many advantages, such as good dynamic response, high accuracy. At last, A system is designed to verify the proposed APF scheme .The results of simulation show that the proposed APF scheme is practical and can detect harmonics and reactive power effectively. Platform: |
Size: 1900544 |
Author:ＭＣ |
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Description: 本文对风电场—无穷大系统进行了简单的仿真分析，主要包括小干扰稳定分析，风电场的并网、负荷扰动以及联络线故障时的暂态分析。然后以达里风电场所在系统为例，在稳态分析和暂态分析的基础上计算风电场允许接入最大容量。
-In this paper, Wind Farm- infinite simple system simulation analysis, including small signal stability analysis, wind farm and the net tie-line load disturbances, as well as the failure of the transient analysis. And then wind up in the host system as an example, in the steady-state analysis and transient analysis based on the calculation of the largest wind power capacity to allow access. Platform: |
Size: 1116160 |
Author:Eason.Yuan |
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Description: 本文以MATLAB/Simulink为工具,从基础的机电动力系统分析出发,通过大量的仿真实验,总结出机电系统数字仿真的一般方法和基本规范。各种电机matlab仿真。-In this paper, MATLAB/Simulink as a tool, from basic mechanical and electrical power system analysis, the adoption of a large number of simulation experiments, electro-mechanical systems summed up the general method of numerical simulation and the basic norms. Matlab simulation of various motor. Platform: |
Size: 973824 |
Author:赵洪森 |
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Description: This paper proposes a fault location method employing wavelet fuzzy neural network to use post-fault transient and steady-state measurements.
When single line to ground fault (SLG) occurs in the distribution lines of an industrial system, the transient feature is distinct
and the high frequency components in the transients can be employed to reveal fault characteristics. In this paper, wavelet transform is
applied to extract fault characteristics from the fault signals. Fuzzy theory and neural network are employed to fuzzify the extracted
information. Wavelet is then integrated with fuzzy neural network to form the wavelet fuzzy neural network (WFNN). The WFNN
is most suitable for post-fault transient and steady-state signal analysis in industrial distribution power system. Analysis and simulation
results illustrate that the theory and algorithm of the WFNN proposed in this paper are efficient in fault location. The WFNN can be
widely applied in fault analysis of power system.-Application of wavelet fuzzy neural network in locating single line
to ground fault (SLG) in distribution lines Platform: |
Size: 227328 |
Author:charlie |
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Description: 锅炉汽包水位控制系统是火力发电厂中的一个重要的热工控制系统，汽包水位的
控制大多采用传统PID控制方式。但是，传统PID控制器参数的整定是在获取对象数学
模型的基础上，根据某一整定规则来确定的，不能进行在线调整，难以适应锅炉汽包
水位这样一个复杂多变的控制系统，其控制效果往往难以满足要求。
本文应用模糊控制技术，设计了一种二输入三输出模糊自整定PID控制器，对锅
炉汽包水位进行控制，实现了PID参数的自适应调节。利用MATLAB对控制系统进行
仿真。结果表明，该控制器自整定能力及鲁棒性比传统PID控制器更强，响应速度快、
精度高，同时对虚假水位有较好的控制效果。-Boiler water level control system is an important thermal power plant in the thermal control system, boiler water level
Control most of the traditional PID control method. However, the traditional PID controller tuning parameters for objects in mathematics
Model based on the rules to determine a whole and can not be adjusted online, it is difficult to adapt to the boiler drum
Water level control such a complex system, its control effect is often difficult to meet the requirements.
In this paper, fuzzy control technology, designed a two input and three output fuzzy self-tuning PID controller, the pot
Steam drum level control, the PID parameters to achieve the adaptive regulation. The control system using MATLAB
Simulation. The results show that the controller auto-tuning capability and robustness more than the traditional PID controller, fast response,
High precision, while the water level has better control of false results. Platform: |
Size: 1248256 |
Author:沉默年糕 |
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Description: 基于变速恒频双馈风力发电系统的理论分析，文中将应用MATLAB／Simulink建立整个系统的模型，主要包括风力机、双馈发电机(含转子侧和网侧变换器)、控制器(含网侧变换器控制器、转子侧变换器控制器)。通过建立的模型对仿真波形进行分析，验证模糊控制器的可行性。-Based VSCF doubly fed wind power generation systems theory, this paper, the application of MATLAB/Simulink model for the establishment of the whole system, including wind turbine, doubly-fed generator (including the rotor and the network side converter), the controller (including net side converter controller, the rotor side converter controller). Through the establishment of the model to analyze the simulation waveform to verify the feasibility of fuzzy controller. Platform: |
Size: 2400256 |
Author:wuxing |
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Description: 针对光伏并网发电系统中关健部件—逆变器的结构设计与控制方法研究进行了详细分析
和阐述。从电网、光伏阵列以及用户对逆变器的要求出发, 分析了各种不同的逆变器拓扑结构与控
制方法, 比较其运行效率和控制效果。对于本文提出了一种基于全桥变换器的正弦波逆变电源的整体设计
方案。文章首先对系统设计中将使用到的DC/DC变换器，DC/AC变
换器以及PWM控制技术在理论上进行了深入的研究。并讨论了数字
式PID控制算法的实现和在系统中的应用，还针对这种基于全桥变换
器的正弦波逆变器提出了一种用一个电压闭环来调节两个控制量的
PID算法。
其次，文章设计了基于全桥变换器、全桥逆变器和以DSP为核
心的逆变电源控制电路，详细介绍了各相关电路模块的原理与结构。
在完成电路参数设计以后，通过使用MATLAB/Simulink软件对整个
系统进行了仿真分析。并对系统软件设计的思路与实现方法以及关键
程序的流程进行了介绍。
最后，通过系统的带载实验对整套系统软硬件设计的合理性进行
了验证。实验结果表明，本文设计的逆变电源硬件电路和软件系统是
成功的。
-The paper comes up with a full-package solution to convert solar power
into AC.This solution is based on the design of the full-bridge converter
and the full-bridge inverter.This paper first gives full analysis on the
theories of power switching technology,inverter technology and PWM
technology.And the theory and fulfillment of PID algorithm are
discussed in this paper.Especially for this solution,this paper comes up
with a PID algorithm in which two variables are being controlled in one
close-loop.
Then,this paper gives the procedure to calculate the main circuit
parameters.The design of digital controlling circuit and assistant circuits,
such as MOSFET driving circuit and voltage protection circuit,are
introduced.Based on the parameters worked out,the paper gives the
simulation of whole system in Matlab/Simulink.This paper also
introduces the firmware design based on the DSP（TMS320F2812）.
The last is the verification of whole system including hardware and
software by t Platform: |
Size: 1939456 |
Author:fmx |
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Description: 本文提出了一种自动检测和电能质量扰动分类模糊专家系统。有关干扰的类型包括电压骤降，骤升，中断，切换瞬变，冲动，闪烁，谐波和缺口。据推测，在所分析的波形采样的形式提供。傅立叶变换和小波分析，利用独特的功能获得的波形一个模糊专家系统为主体的决定有关的干扰类型而设计的。仿真研究，验证了该方法的比较研究人工神经网络为基础的分类方法和该方法研究的准确性也报告，以显示该方法的优点-This paper presents a fuzzy-expert system for automated detection and classification of power quality disturbances. The types of concerned disturbances include voltage sags, swells, interruptions, switching transients, impulses, flickers, harmonics, and notches. It is assumed that the analyzed waveforms are available in sampled form. Fourier transform and wavelet analysis are utilized to obtain unique features for the waveforms A fuzzy-expert system is designed for making a decision regarding the type of the disturbance. Simulation studies are presented to verify the accuracy of the proposed approach Comparison studies between an Artificial Neural Network based classification technique and the proposed approach are also reported to show the advantages of the proposed approach. Platform: |
Size: 444416 |
Author:韩小峰 |
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Description: Utility restructuring, technology evolution,
public environmental policy, and expanding power
demand are providing the opportunity for microturbines
to become important energy resources. In order to
investigate the ability of microturbine units in
distribution systems, new simulation tools are needed.
This paper presents a dynamic models for microturbines.
For the purpose of modeling initialy a dynamic model
for each component in the system, including gas turbine,
permanent magnet generator, DC bridge rectifier and
power inverter is developed and after this stage the
model is implemented in a simulation software. In this
research the simulation tool is Matlab/Simulink. Also the
systems stand-alone dynamic performances is analyzed
and evaluated. Platform: |
Size: 307200 |
Author:proust |
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Description: Abstract—In this paper a current reference generation
method for a voltage source shunt active power filter is
examined. The proposed method improves the harmonic
filtering by compensating the delays in the system. In
stationary operating point of the load the method uses
measurement data sampled in previous periods to generate a
reference prediction. Since in transient state of the load the
prediction no longer holds true, a computational control delay
compensation algorithm is used in the reference generation
instead of the prediction in this situation. Changing the
algorithm according to the operating point guarantees effective
harmonic compensation in all operating points. In this paper
the system performance is examined with an active filter
simulation model. Platform: |
Size: 274432 |
Author:yasser |
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Description: 本文首先介绍了电力系统的潮流计算的过程和方法步骤，然后建立模型进行仿真-This paper introduces the trend of power system and methods of computation steps in the process, and then build the model for simulation Platform: |
Size: 215040 |
Author:wangb |
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Description: This paper presents three strategies for reactive power control in wind farms with STATCOM. First, the
STATCOM system and its applications in electric power systems and wind farms are shown. Second, the modeling done of the
wind farm, the STATCOM and the network are presented. Finally, control strategies for reactive power delivered by the park
to the network when required are shown. The result of the implementation of each control strategy is shown by simulation. Platform: |
Size: 776192 |
Author:alok |
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Description: This paper presents the Direct Power Control of
Three-Phase Matrix Converters (DPC-MC) operating as Unified
Power Flow Controllers (UPFC). Since matrix converters allow
direct AC/AC power conversion without intermediate energy
storage link, the resulting UPFC has reduced volume and cost,
together with higher reliability. Theoretical principles of DPCMC
method are established based on an UPFC model, together
with a new direct power control approach based on sliding mode
control techniques. As a result, active and reactive power can be
directly controlled by selection of an appropriate switching state
of matrix converter. This new direct power control approach
associated to matrix converters technology guarantees
decoupled active and reactive power control, zero error
tracking, fast response times and timely control actions.
Simulation results show good performance of the proposed
system. Platform: |
Size: 631808 |
Author:abdalla el-saadaney |
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Description: 风力发电机组不同于火电等传统发电机组的最大之处
在于其原动机功率的本质不可控，这是由风速的易变性和不
可控性造成的。风速状况对风力发电系统的性能有着重要的
影响，也使得风速模型成为风力发电系统仿真模型的重要部
分。该文针对风速随机变化的特性，在风速统计特性研究的
基础上，用自回归滑动平均(ARMA)方法建立了具有一定
功率谱密度特性的风速模型。对该模型所模拟的风速序列进
行了分析和验证，并与现有仿真程序中风速模型的结果进行
了对比，结果表明该文提出的ARMA模型能够有效地产生
动态分析和仿真所需的风速序列。
-Unlike traditional thermal power generating units in the uncontrollable nature of its prime mover power wind turbine, which is caused by the variability of the wind speed and uncontrollability. Wind speed condition has an important impact on the performance of the wind power generation system, and also makes wind model to become an important part of the wind power system simulation model. Paper, the characteristics of wind speed changes randomly, on the basis of the wind speed statistical characteristics of self-regressive moving average (ARMA) method to set up wind speed model has a certain power spectral density characteristics. Analysis and validation of the model simulated wind speed sequence, compared with the results of existing simulation program in wind speed model, results show that the proposed ARMA model can effectively generate dynamic analysis and simulation of the wind speed required sequence . Platform: |
Size: 234496 |
Author:快淹死的yu |
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Description: In this paper an alysis of the stability enhancement and improved damping of power swings in a multi-machine power system by means of thyristor-controlled braking resistor installed in the network has been presented. The control law has been derived using direct Lyapunov method and non-linear multi-machine system model. It is optimal in the sense that it causes the quickest dissipation of the power system energy released by a disturbance. Simple implementation of this control using only locally available signal has been also demonstrated. A computer simulation of a multi-machine power system model has verified the effectiveness of the proposed algorithm-In this paper an analysis of the stability enhancement and improved damping of power swings in a multi-machine power system by means of thyristor-controlled braking resistor installed in the network has been presented. The control law has been derived using direct Lyapunov method and non-linear multi-machine system model. It is optimal in the sense that it causes the quickest dissipation of the power system energy released by a disturbance. Simple implementation of this control using only locally available signal has been also demonstrated. A computer simulation of a multi-machine power system model has verified the effectiveness of the proposed algorithm Platform: |
Size: 175104 |
Author:golalipour |
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Description: This paper investigates the effects of Static Var
Compensator (SVC) on voltage stability of a power system. This
paper will discuss and demonstrate how SVC has successfully
been applied to power system for effectively regulating system
voltage. One of the major reasons for installing a SVC is to
improve dynamic voltage control and thus increase system load
ability. This paper presents modeling and simulation of SVC in
MATLAB/Simulink. In this paper A SVC is used to regulate
voltage in a power system. When system voltage is low the SVC
generates reactive power (SVC capacitive). When system
voltage is high it absorbs reactive power (SVC inductive). The
SVC is rated +100 Mvar capacitive and 50 Mvar inductive. The
SVC more effectively enhance the voltage stability and increase
transmission capacity in a power system. Platform: |
Size: 141312 |
Author:ashijun
|
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Search - simulation paper power system