I_search_test

说明：  本程序可以建立算法来形成节点阻抗矩阵,利用节点阻抗矩阵来计算短路故障情况下的节点电压和线路电流，程序可供电力系统编程参考。(This program can establish an algorithm to form the node impedance matrix, and use the node impedance matrix to calculate the node voltage and line current in the case of short circuit fault. The program can be used as a reference for power system programming.)

说明：  一个10自由度齿轮传动系统动力学模型，通过调用ode45进行求解，考虑了轴承刚度和阻尼。(one 10-dof dynamic model of the gear transmission system with its analysis process)

电力变压器是电力系统中的主要设备之一，利用它可以把不同电压的电网联结在一起，组成复杂的电网或庞大的电力系统，并在其中发挥着重要的作用。电力变压器的可靠运行关系到整个电网的安全，如何对电力变压器的运行中的故障进行诊断，已成为电力部门急需解决的问题。目前，以油中溶解气体为特征量对变压器的故障进行分析，得到了广泛应用。 本次设计要求对电力变压器的内部故障进行广泛了解，并应用BP神经网络对变压器进行智能故障诊断软件设计，实现变压器内部故障论断。主要包括以下内容： 1、掌握用以变压器油中气体为特征量，用BP神经网络诊断变压器内部故障的方法 2、用 Visual Basic编制变压器故障诊断软件，具有以下功能： a) 数据管理功能。包括变压器信息，色谱数据信息等 b) 故障诊断功能。包括用BP神经网络诊断变压器故障的具体实现方法，并给出故障诊断结果 c) 图形显示功能。包括对同一变压器内气体浓度变化曲线的显示等 d) 辅助功能。如帮助信息，诊断方法的介绍等 (Power transformer is one of the main equipment in power system, it can use the network of different voltage linked together, to form a complex network or large electric power system, and plays an important role in it. Power transformer for the reliable operation of the power grid safety, how to run in power transformer fault diagnosis, has become urgent to solve the problem of electric power sector. At present, the DGA in transformer fault analysis, obtained the widespread application. The design of power transformer internal fault is widely understood, and the application of BP neural network to transformer fault diagnosis software design, realization of transformer internal fault diagnosis. Mainly include the following contents: 1, master for gas in transformer oil as features, using BP neural network diagnosis method of transformer internal fault In 2, Visual Basic system of transformer fault diagnosis software, has the following functions: A ) data management function. )

有源滤波器补偿电流谐波检测算法PQ和IP/IQ法，simulink搭建模型并且误差极小(Active filter compensation current harmonic detection algorithm PQ and IP/IQ method, simulink build model and the error is minimal)

根据温度/相对湿度/风速/衣服等计算空调环境下人体热舒适PMV-PPD指标。(According to temperature / relative humidity / wind speed / clothing, the PMV-PPD index of human thermal comfort in air conditioning environment is calculated.)

2.5维的柱坐标系的正演程序，fortran的语言，供大家参考(Forward procedure 2.5 dimensional cylindrical coordinate system, FORTRAN language, for your reference)

光伏阵列基于升压电路（BOOST）的最大功率跟踪算法 -差分进化算法，适用于多峰条件(Photovoltaic array based on booster circuit (BOOST) maximum power tracking algorithm, differential evolution algorithm, is suitable for the multi-peak conditions)

热电联供系统多能流建模，采用扩展牛顿—拉夫逊算法统一求解的方法进行计算。(The multi-energy flow model of cogeneration system is modeled and calculated by the unified method of extended Newton-Raphson algorithm.)

这是一个变速变桨距控制的9MW风力发电并网系统（DFIG），先运行.m文件，设定Ts=5e-6s。亲测有效(This is a variable speed pitch control 9MW wind power generation grid connected system (DFIG). First, run the.M file and set Ts=5e-6s. Pro test effectiveness)

说明：  计算电机启动时母线电压暂降的模型 对暂降幅值和相位进行了测量(A model for calculating bus voltage sag during motor starting the amplitude and phase of sag are measured)