softswitch

用于基本的机械领域的飞轮建模分析，熟悉apdl的基本建模技巧(for modling the flywheel by using the apdl)

MATPOWER is a package of free, open-source Matlab-language M-files for solving steady-state power system simulation and optimization problems, such as: power flow (PF), continuation power flow (CPF), extensible optimal power flow (OPF), unit commitment (UC) and stochastic, secure multi-interval OPF/UC. It is intended as a simulation tool for researchers and educators that is easy to use and modify. MATPOWER is designed to give the best performance possible while keeping the code simple to understand and modify.

说明：  用于计算电力系统潮流，使用了牛顿拉普斯算法，IEEE34 节点系统(Newton raphson algorithm and IEEE34 node system are used to calculate power flow)

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.)

双向DC/DC控制器研究 日照区时，光伏发电系统提供负载能量，同时多余的能量通过DC 给蓄电池充电；日影区时，蓄电池通过DC给负载提供能量。(Bidirectional DC/DC controller of photovoltaic power generation system Rizhao area, providing load energy, the excess energy through the DC to charge the battery the shadow area, the load is supplied by battery energy DC.)

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)

mathematical model of wind Turbine

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：  最小成本目标函数条件下，进行电力系统优化潮流计算，约束包括最大最小出力、网络约束、爬坡约束等。(a power system optimized calculation program is performed under the condition of minimum cost objective function, and the constraints include maximum and minimum output, network constraints and climbing constraints.)

APF中DQ变换的电流测量，能够测量出电网中的谐波(Current measurement of DQ transformation in APF)