calculation

包括15个常用的IEEE电网节点数据，有BPA，清华，IEEE和euro四种格式(it contains 15 power grid IEEE data, there are BPA, tsinghua, IEEE and euro format)

三相光伏并网逆变器MATLAB/simulink仿真模型(MATLAB/simulink simulation model of three-phase photovoltaic grid-connected inverter)

在分析光伏发电原理与光伏电池数学模型的基础上，对由若干光伏阵列组成的大型光伏电站进行PSCAD仿真建模，并分析其运行特性。采用恒电压跟踪方法并利用不同温度下的测量制表值共同实现大规模光伏阵列的最大功率点跟踪(maximum powerpointtracking，MPPT)，并设计了相应的并网逆变器控制策略。最后，对大型光伏电站在正常运行以及站内外发生三相短路故障的情况进行仿真分析。(On the basis of analyzing the principle of photovoltaic generation and mathematical model of PCcells.)

运用分支定界法求解混合整数线性规划，可用于求解电力系统机组组合问题( solving mixed integer linear programming branch and bound method ,and the program can solve unit commitment problem)

一个PSCAD的PV光伏系统模型，能完美运行，配合用户系统使用研究。(A PSCAD PV PV system model that works perfectly with the user system using the study.)

四机两区算例(4机2区算例),与昆德(Kunder)书中参数一致，包含详细的发电机模型，算例在PSCAD4.2中可以运行，是学习PSCAD难得的资料。(The four-machine two-zone example (4-plane 2-zone example) is consistent with the parameters in Kunder s book, including detailed generator model. The example can be run in PSCAD4.2, which is a rare learning material for PSCAD.)

是一个s7-200 smart与台达变频器通讯及电机控制的程序(Is a S7-200 smart and delta inverter communication and motor control procedures)

说明：  先dq变换然后构建电压外环电流内环的双闭环系统，实现了statcom的前馈解耦控制。可以解决大负载投入的电压降落问题。(First, dq transform is used to construct the double closed-loop system of voltage outer loop and current inner loop, which realizes the feedforward decoupling control of STATCOM. It can solve the voltage drop problem of large load input.)

基于PSCAD软件，对变压器的物理模型进行建模，供大家学习(Based on PSCAD software, the physical model of transformer is modeled for everyone to learn.)

该程序计算翅片式冷凝器选型软件，制冷剂为R22,根据冷媒侧进出口参数求换热面积。比较实用的(The program calculates fin type condenser selection software, refrigerant R22, according to refrigerant side inlet and outlet parameters for heat exchange area. More practical)