配电网零序电流故障定位方法在PSCAD中的模型搭建zerosimulation

SIM900开发板配套STM32 GPRS代码(SIM900 STM32 GPRS driver)

滤波器广泛应用于数字信号处理、通信、自动控制领域,但设计可变宽频带有源滤波器则比较困难。利用单片机控制参数可编程的双二阶通用开关电容有源滤波器,精确设置有源滤波器的中心频率f，品质因数Q及有源滤波器的工作方式。本系统主要分为两个部分:即程控滤波器和程控放大器。程控放大器电压增益为40dB，通过单片机控制DA进行分压，可精确实现要求的10dB步进，误差小于0.5 ，通带为100Hz-500KHz，输入电压峰－峰值范围为10mV，在输入范围内无明显失真。由MAX264为核心的滤波器，可设置为高通、低通滤波器。通过单片机直接给出控制频率，使-3dB截止频率在1KHz-20KHz内可调，步进1KHz，误差小于1 。整个系统以52单片机为控制核心，电路简单，性能稳定，且具有较高精度，滤波参数调节通过单片机控制，较为方便。(Filters are widely used in digital signal processing, communications, automatic control area, but the design variable wideband active filter is more difficult. Control parameters using single-chip programmable universal switched-capacitor biquad active filter, active filter accurately set the center frequency f, quality factor Q and the active filter works. The system is mainly divided into two parts: the program-controlled filters and programmable amplifiers. Programmable amplifier voltage gain of 40dB, the DA through the partial pressure of single-chip control, can accurately achieve the required 10dB step, the error is less than 0.5 , passband to 100Hz-500KHz, input voltage peak- the range of 10mV, the input range no significant distortion. By the MAX264 as the core of filter can be set to high pass, low pass filter. Given directly by the microcontroller controls the frequency, the-3dB cutoff frequency at 1KHz-20KHz adjustable, step 1KHz, error is less than 1 . The entire system for)

Keil uvision4.0 环境下的MCS-51单片机入门学习例程！(Keil uvision4.0 environment MCS-51 microcontroller started learning routines!)

无线传能控制程序，主级，能够实现无线充电，但是需要硬件的配合。(Wireless energy transfer control program, the main stage, enabling wireless charging, but requires the hardware support.)

一个变压器保护的程序，是配电变电所内的保护程序(A transformer protection program, is within the power distribution substation protection program)

C8051F060 自带高速AD进行数据采集 可达100兆采样率 并切缓存与片外ram 并把采集数据通过串口发送给PC ( Data Acquisition example for C8051F060 Description: This example illustrates the use of ADC1 and the DMA to acquire and store data. It is intended for use with the C8051F060 target board in the development kit. // This code measures a signal at the AIN0 input with the 16-bit SAR ADC0. // The data is sampled at a rate of 100kHz. ADC output data is transferred to XDATA memory space using the DMA. // // With the EMIF configured for off-chip XRAM access (on the upper ports), this code moves the ADC data to the C8051F060TB target boards s SRAM device. // Once data acquisition is complete, the code then prompts the user to press the P3.7 // button on the target board when ready to receive the data via the UART0 serial port. The TB features an RS-232 transceiver and connector, so the data can be transferred // to a PC via its serial port. // The code is set to acquire up to 32768 samples (for 64kbytes of data). The SRAM device - can accommodate up to 128kbytes, )

直流发电机的调速程序，使用的是STC12C5A的单片机，采用PWM技术来调节他的速度，简单便捷。(DC generator speed control program use is microcontroller of STC12C5A, and PWM technology to adjust his speed, simple and convenient.)

这是一个定时器程序。适合于单片机初学者……(This is a timer program. Suitable for beginners ... ... MCU)

RTD2660 RTD2660H 源码 可点TTL LVDS屏 可做AV VGA DVI HDMI接口(RTD2660 RTD2660H source point TTL LVDS screen can do the AV VGA DVI HDMI Interface)

MEGA8的PWM输出功能来完成三路PWM波形.doc(MEGA8 PWM output function to complete the three-way PWM waveform. Doc)