differential_protection

大型风电场接入电网的稳定性问题研究,希望对大家有点启发( the problems of Large wind farms connected to the grid stability)

说明：  使用电力系统电磁暂态仿真软件PSCAD，对风电场进行设计并仿真(Electrification system electromagnetism transition condition simulation software PSCAD, the windward electric field carries on the design and the simulation )

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.)

说明：  基于瞬时无功功率理论、滞环电流控制的三相电力有源滤波器Matlab仿真模型(The model of APF is established by the Power System of Matlab.The calculation of harmonic current based on three-phase instantaneous reactive power theory and hysteresis current tracking control strategy are analyzed.)

基于随机邻域搜索的含风电配电网优化规划 本程序提出了含风电配电网中基于半不变量的随机潮流算法，该算法考虑了风电的出力随机性，运用了概率统计方法处理系统运行中的随机变化因素，给出系统运行电压、支路潮流等概率分布情况，可以更深刻地揭示系统运行状况，为系统安全运行决策提供更完整的信息。 随机变量的卷积运算是随机潮流计算量较大的部分，利用半不变量的方法进行随机变量间的卷积运算，并用Gram-Charlier级数展开式计算随机变量的分布[4-6]将使整个随机潮流计算效率很高，其精度也足以满足规划和运行分析的要求。(This code package mainly analyzes the characteristic of smart grid and the influence RES bring to distribution networks. In this paper, evaluation was made for the necessary improvements on intelligentizing transformation from different aspects, such as load forecast, power stationing planning and network planning, which will truly provide theoretical guidance for the planning work of intelligent distribution networks.)

vumat 代码，用于abaqus explicit 金属塑性伤害模拟(vumat subrountine for abaqus explicit ,the hill parameter is to set 0.5 and 1.5 by default.)

电力系统综合分析程序PSASP7.0的标准算例，很难找的。只要将相关算例用PSASP打开即可进行相关分析(Power system analysis program PSASP7.0 standard example, it is difficult to find. As long as the relevant example PSASP open to correlation analysis)

轴系扭转振动的matlab计算,将采集的脉冲信号转化成扭转角。(torsional vibration)

自己搭的电力系统继电保护中的距离保护模型，对理解继电保护的原理很有帮助(Take your own power system relay protection distance protection model for understanding the principles of protection helpful)

说明：  实现两相并网逆变器的SPWM控制,可利用在光伏并网系统中(Realize SPWM control of two - phase grid-connected inverter)