微机继电保护算法三个分析题
1设计一个减法数字滤波器，并编程验证其滤波效果
MATLAB程序1clccleara11b1100000001f01450h1absfreqzb1a1f1200H1h1maxh1plotfH1xlabelfHzylabelH1
title滤波器的幅频特性
MATLAB程序2clccleara11b1100000001f01450h1absfreqzb1a1f1200H1h1maxh1plotfH1xlabelfHzylabelH1N24t10002N004msizet1Va100si
2pi50t1Va125100si
2pi50t140si
6pi50t120si
6pi100t1Yzeros18forjj9m2YjjVa1jjVa1jj81414
fe
dsubplot231plott1VaroxlabeltsylabelvVatitle基波电压Vasubplot232plott1Va1bsxlabeltsylabelvVa1title叠加直流分量和3、6次谐波后的电压Vasubplot233plott1YgxlabeltsylabelvVtitle经滤波后的输出电压Ysubplot234plott1Varot1Va1bst1YgxlabeltsylabelvYgrido
title滤波效果的仿真波形
f2推导三采样乘积算法，并给出当采样频率f1200HZ时，参数计算公式及验证
MATLAB程序
clcclearN24t10002N004msizet1Va100si
2pi50t1Ia50si
2pi50t1pi6forjj4m2RjjVajj1Iajj1Vajj3Iajj3sqrt3Vajj2Iajj2Iajj12Iajj32sqrt3Iajj22XjjsqrtVajj1Iajj3Vajj3Iajj1Vajj1Iajj3Vajj3Iajj1sqrt3Vajj1Iajj2Iajj2Iajj1Vajj1Iajj2Iajj2Iajj1sqrt3Vajj3Iajj2Vajj2Iajj3Vajj3Iajj2Vajj2Iajj3Iajj12Iajj32sqrt3Iajj22ZjjsqrtVajj1Vajj1Vajj3Vajj3sqrt3Vajj2Vajj2Iajj1Iajj1Iajj3Iajj3sqrt3Iajj2Iajj2Ojj180piata
sqrtVajj1Iajj3Vajj3Iajj1Vajj1Iajj3Vajj3Iajj1sqrt3Vajj1Iajj2Iajj2Iajj1Vajj1Iajj2Iajj2Iajj1sqrt3Vajj3Iajj2Vajj2Iajj3Vajj3Iajj2Vajj2Iajj3Vajj1Iajj1Vajj3Iajj3sqrt3Vajj2Iajj2e
dsubplot231plott1Varot1Iabotitle（测量到的电压和电流量）subplot232plott1RboylabelRtitle（计算得到的电阻值）subplot233plott1XboylabelXtitle（计算得到的电抗值）subplot234plott1ZboylabelZtitle（计算得到的阻抗值）subplot235plott1Obo
fylabela
gletitle（计算得到的相位差）
3推导f1200HZ利用傅里叶算法求基波、二次和三次谐波的a
，b
计算公式及验证
MATLAB程序clcclearallN24t0002N006dsizetv110v210si
t2pi50v320si
t2pi100v430si
t6pi50vv1v2v3v4subplot421
fplottv1tv2rtv3btr