小电流接地系统故障

对地震数据进行逆F-K变换，得到的结果变回到时间域(The inverse F-K transform of seismic data is returned to the time domain.)

热力系统中将水力模型与热力模型同时考虑，使用牛顿拉夫逊算法进行联合求解。(Hydraulic model and thermal model are considered simultaneously in the thermal system, and Newton Raphson algorithm is used to solve them jointly.)

用于石油勘探的射线追踪程序，可实现不同形式的射线追踪，包含marmousi模型的实际例子(This procedue is used for oil exploration perform ray tracing,it can perform different kink of ray tracing,include marmousi model example)

异步电机速度、电流、磁链闭环控制，电流控制采取滞环控制，动态跟踪效果较好。(The closed-loop control of speed, current and flux of induction motor and hysteresis control of current control have good dynamic tracking effect.)

Digsilent user manual 15.1

说明：  三相光伏逆变器孤岛运行，亲测可用，毕设作业(Three phase photovoltaic inverter islanding operation, available)

一个在1毫秒中断中查询的B码接收,解码程序(IRIG B CODE recieve and decode .)

频率波数域波动方程正演（单点模拟也可随意给）(Frequency-wavenumber domain wave equation forward (single-point analog also be free to give))

HLDZ系列回路电阻测试仪是测量断路器、母线连接处、母线上接触部件和其它流经大电流接点的导电回路电阻及冶金部门测试两种不同金属面接触电阻的可靠性高的通用测试仪器。 技术指标 1、输出电流：　　　　 ≥３００Ａ 2、分辨率：　 ±１　微欧 3、测试范围： ０—２０００　微欧 4、测量准确度：　　　　 0.5％　 (HLDZ series loop resistance tester is a measure of circuit breakers, busbar joints, bus parts and other exposure to a large current flows through the contacts of the conductive loop resistance and metallurgical sector test two different metal surface contact resistance and high reliability of the general test equipment. Specifications 1, output current: ≥ 300A 2, resolution: ± 1 micro Euro 3, Range: 0-2000 micro Euro 4, the measurement accuracy: 0.5 )

说明：  采用PSCAD搭建了简化的换流阀不可控充电过程，并模拟了不同故障下的电路状态。(PSCAD is used to build a simplified uncontrolled charging process of the converter valve, and the circuit state under different faults is simulated.)