Description: ％ 该Matlab程序基于牛顿－拉夫逊算法，用于计算已知导纳矩阵、PQ节点、PV节点、平衡节点(UA)的电力网络潮流
％ U - 各节点母线电压 S - 各节点注入功率 S_net - 电力网络总损耗
％ PQ_P - 实算PQ节点注入有功功率 PQ_Q - 实算PQ节点注入无功功率
％ delt_PQ_P - 实算PQ节点有功功率修正值 delt_PQ_Q －实算PQ节点无功功率修正值
％ delt_UA_P - 实平衡节点有功功率修正值 delt_U_2 - 实平衡节点电压平方修正值
％ delt_PQV - 实算P Q U^2修正值 J - 雅可比矩阵
％ e - 电压实部 f - 电压虚部 delt_ef - 电压实部与虚部修正值- The Matlab program based on the Newton- Raphson algorithm is used to calculate the admittance matrix is known, PQ node, PV node, the node balance (UA) the trend of the electricity networks U- the node bus voltage S- each node injection power S_net-- The total loss of electric power networks PQ_P- operator PQ is injected into active nodes PQ_Q- operator PQ is injected reactive power node delt_PQ_P- is considered the correct value of active power PQ node delt_PQ_Q- really count PQ node reactive power to amend the value of delt_UA_P- real active power balance of the correct value of the node delt_U_2- node voltage balance is the correct value of the square of delt_PQV- really count PQU ^ 2 the correct value of J- Jacobian matrix e- voltage real part f- the imaginary part of voltage delt_ef- voltage real part and imaginary part of the amendment value Platform: |
Size: 7168 |
Author:mmcc |
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Description: 利用该MATLAB程序可实现对一般电力系统的节点、支路及其损耗的潮流计算。-Using the MATLAB program can be realized on the general power system node, slip and loss of power flow calculation. Platform: |
Size: 22528 |
Author:钱敏 |
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Description: 把地理区域分成一个个小区，蜂窝系统在该区域内提供无线覆盖。把可用的频谱分成很多信道，每个小区分配一组信道。使用频分双工（FDD）。在小区间进行频率利用，N个小区构成一个簇，簇间进行频率复用。定义了传播特性（信道参数）以及同频小区的位置。信道的参数包括：小区半径，路径损耗指数，以分贝为单位的对数正态阴影的标准差，基站发射功率级，移动台发射功率级，每个小区的扇区数，扇区化天线的正反向比，要仿真的瞬时位置的组数，同频干扰阈值。-To a geographical area is divided into small areas, cellular systems in the region to provide wireless coverage. The available spectrum is divided into multi-channel, each plot the distribution of a group of channels. The use of frequency division duplex (FDD). In the district between the frequency of use, N plots constitute a cluster, cluster between frequency reuse. The definition of the propagation characteristics (channel parameters), as well as with the frequency of residential location. Channel parameters include: cell radius, path loss index to decibels for units Lognormal shadow of the standard deviation, the base station transmitter power level, mobile station transmitting power level, the number of sectors in each district, sector of the antenna the pros and cons to the ratio, to the transient simulation of the group a few positions, the same frequency interference threshold. Platform: |
Size: 2048 |
Author:mame |
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Description: 电力系统考虑网损的经济调度程序，采用的是经典算例，算例实用性较好。-Net loss of power system considering the economic dispatch procedures used are the classic example, a good practical example. Platform: |
Size: 4096 |
Author:yangzhan |
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Description: A signal is transmitted using a carrier frequency of 900 MHz. It is
transmitted through a multipath channel which can be modelled as Rayleigh
fading. Assumingthe Dopper spread as 10Hz and the number of multipaths as
10, generate the Rayleigh faded signal. Compute the outage rate (the
probability of the signal falls below certain rate, say ?10 dB) of the
signal.
Using MATLAB, demonstrate the path loss as a function of loss parameter
for distances ranging from 2 km to 40 km. Calculate the power loss in dB Platform: |
Size: 1024 |
Author:Johnathan |
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Description: 自己制作的光伏PV发电求线路损耗的Matlab/simulink模块，通过改变参数可得出不同地点处的功率损耗。-Produce their own photovoltaic PV power generation demand line loss of Matlab/simulink module parameters can be obtained by changing the Office of the power loss in different locations. Platform: |
Size: 6144 |
Author:陈成 |
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Description: 前推回推法计算配电网潮流，已经通过验证，结果正确。同时计算出电压、电流、网损。-Calculation of forward and backward push distribution networks, has been validated, the results correctly. At the same time to calculate voltage, current, power loss. Platform: |
Size: 1024 |
Author:苏怡益 |
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Description: 优秀论论及对应源码。电力系统配电网的无功优化规划是保证配电网安全、经济运行的一项有效手段，是降低网损、提高电压质量的重要措施。因此，电力系统配电网无功优化规划问题的研究，既具有理论意义，又具有工程实际应用价值。配电系统最优规划问题是一个复杂的非线性组合优化问题，至今未得到很好的解决。Tabu搜索(TS—Tabu search)算法是近年来出现的用于求解组合优化问题的一种高效的启发式搜索技术。本文采用固定并联电容器作为研究对象对系统进行无功补偿，并利用智能优化方法得到使配电网损耗降低最大对应的最优节点解。并在补偿容量的邻域搜索方面做了改进，采用扩大邻域搜索范围以达到全局最优的效果。用IEEE的两个算例得出的计算结果证明了这种方法的可行性。-Excellent deals on the corresponding source code. Power system with reactive power distribution network optimal planning is to ensure the safety, economic operation of an effective means of reducing the net loss, an important measure to improve the voltage quality. Therefore, the power system reactive power optimization of distribution network planning study, not only has theoretical significance, but also has practical engineering value. Optimal distribution system planning is a complicated nonlinear optimization problem, has not been solved. Tabu Search (TS-Tabu search) algorithm is used in recent years for solving combinatorial optimization problems an efficient heuristic search techniques. In this paper, as the research object of fixed shunt capacitors for reactive power compensation system, and using intelligent optimization method to reduce the loss of the largest distribution network node corresponding to the optimal solution. Compensation capacity in the neighborhood search are Platform: |
Size: 112640 |
Author:NBB |
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Description: 移动信道在路径损耗和阴影衰落大尺度衰落下，随基站和移动台间的距离变化的功率变化情况-Mobile channel path loss and shadow fading in the large-scale fading, with the base station and mobile station changes the distance between the power changes Platform: |
Size: 4096 |
Author:杨朝云 |
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Description: 建立EDFA的放大模块模型，不考虑损耗，仅考虑功率放大功能- Build EDFA amplification module model, without considering the loss, only consider the power zoom function Platform: |
Size: 1024 |
Author:helianthus |
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Description: MATLAB实现对该系统的潮流计算。需要MATLAB语言编制程序形成节点导纳矩阵、形成雅克比矩阵、用高斯消去法解修正方程式，并编写输出程序用以输出节点导纳矩阵、节点电压（包括电压的相角和幅值）、以及各支路的首端功率、末端功率和功率损耗-MATLAB implementation of the system flow calculation. MATLAB programming language requires the formation of the node admittance matrix, Jacobian matrix formed by modified Gaussian elimination method for solving equations, and write out procedures for the admittance matrix of the output node, the node voltage (including the voltage phase angle and amplitude), and the first end of each branch of power, end power and power loss Platform: |
Size: 1024 |
Author:高阳 |
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Description: 光伏电池阵列输出功率受光照强度和温度变化的影响，因此最大功率点跟踪（MPPT）技术广泛应用于光伏系统中。在所有最大功率点(MPP)控制策略中，扰动观察（P&O）MPPT算法因易实现被广泛应用，然而它的缺点是在稳定工作状态下工作点通过MPP 时会导致能量振荡损耗，并且在光照强度或温度发生突变时表现较差的动态响应。在本文中，提出一种改进型变步长扰动观察MPPT 算法，此方法依据工作点动态调整步长变化，与传统固定步长方法比较，本文提出的方法能有效地提高MPPT 速度和转换效率，通过仿真和实验结果分析，验证了此改进算法的可行性。-PV array output power by the light intensity and temperature changes, the maximum power point tracking (MPPT) technology is widely used in photovoltaic systems. In all the maximum power point (MPP) control strategy, the disturbances observed (P & O) MPPT algorithm due to easy implementation is widely used, but its drawback is that the steady-state operating point by MPP will lead to energy oscillations loss, and in the light intensity or temperature when the poor performance of a mutation in the dynamic response. In this paper, propose a modified variable step disturbance observed MPPT algorithm, this method dynamically adjusted according to operating point step change, with the more traditional fixed-step method, the proposed method can effectively improve the MPPT speed and efficiency, The simulation and experimental results verify the feasibility of this improved algorithm. Platform: |
Size: 516096 |
Author:YUJIAN.XU |
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Description: 程序为改进的遗传算法对配电网无功优化补偿问题。电力系统配电网的无功优化规划是保证配电网安全、经济运行的一项有效手段，是降低网损、提高电压质量的重要措施。-Reactive power optimization is one of the most important control methods to ensure power system operation securely and economically,and an effective measure to improve the voltage quality and reduce the power loss.Study on reactive power optimization has the great significance in theory and practical application. Transmission network optimal planning problem is a nonlinear，large scale combinatorial optimization problem. Platform: |
Size: 8192 |
Author:徐正 |
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Description: DG placement in a 33-bus distribution power system using data envelopment analysis technique considering voltage profile, reliability, power loss and cost. Platform: |
Size: 29696 |
Author:arman9069
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Description: 这是一个计算电力系统的传输线路损耗的matlab实例，可以帮助初学者学习潮流计算 。(This is a calculation of power transmission line loss matlab example, can help beginners learn the power flow calculation.) Platform: |
Size: 252928 |
Author:李墨之
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Description: Consider unit 1 and unit 2 are thermal power plants and the third unit is hydro power plant, and neglect power loss. Platform: |
Size: 13312 |
Author:asgedom
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Description: Consider unit 1 and unit 2 are thermal power plants and the third unit is hydro power plant, and considering power loss. Platform: |
Size: 13312 |
Author:asgedom
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Description: Consider unit 1 and unit 2 are thermal power plants and the third unit is hydro power plant, and consider power loss.
Note: Regarding the transmission loss consider quadratic function taking the generating values as variable Platform: |
Size: 13312 |
Author:asgedom
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Description: This paper presents a new method to solve the network reconfiguration problem in the presence of distributed generation (DG) with an objective of minimizing real power loss and improving voltage profile in distribution system. A meta heuristic Harmony Search Algorithm (HSA) is used to simultaneously reconfigure and identify the optimal locations for installation of DG units in a distribution network. Sensitivity analysis is used to identify optimal locations for installation of DG units. Different scenarios of DG placement and reconfiguration of network are considered to study the performance of the proposed method. The constraints of voltage and branch current carrying capacity are included in the uation of the objective function. The method has been tested on 33-bus and 69-bus radial distribution systems at three different load levels to demonstrate the performance and effectiveness of the proposed method. The results obtained are encouraging. (2014-11-17 Platform: |
Size: 58368 |
Author:salameh |
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Search - power loss matlab