三相电压不对称分离正负序dsp程序实现

以下是一种基于DSP的三相电压不对称分离正负序的程序实现：

#include <stdio.h>
#include <math.h>

#define PI 3.14159265358979323846

typedef struct {
    double real;
    double imag;
} complex_t;

void complex_multiply(complex_t a, complex_t b, complex_t *c) {
    c->real = a.real * b.real - a.imag * b.imag;
    c->imag = a.real * b.imag + a.imag * b.real;
}

int main() {
    double Va = 220; // A相电压
    double Vb = 220 * cos(120 * PI / 180); // B相电压
    double Vc = 220 * cos(-120 * PI / 180); // C相电压
    double Kp = 0.001; // 滤波器增益系数
    int i;

    // 采样并滤波
    double Va_filt[3] = {0, 0, 0};
    double Vb_filt[3] = {0, 0, 0};
    double Vc_filt[3] = {0, 0, 0};
    for (i = 0; i < 1000; i++) {
        Va_filt[2] = Va_filt[1];
        Va_filt[1] = Va_filt[0];
        Va_filt[0] = Va;
        Vb_filt[2] = Vb_filt[1];
        Vb_filt[1] = Vb_filt[0];
        Vb_filt[0] = Vb;
        Vc_filt[2] = Vc_filt[1];
        Vc_filt[1] = Vc_filt[0];
        Vc_filt[0] = Vc;
        Va = Kp * (Va_filt[0] + 2 * Va_filt[1] + Va_filt[2]);
        Vb = Kp * (Vb_filt[0] + 2 * Vb_filt[1] + Vb_filt[2]);
        Vc = Kp * (Vc_filt[0] + 2 * Vc_filt[1] + Vc_filt[2]);
    }

    // 计算正序电压
    complex_t Vabc, Van, Vbn, Vcn;
    Vabc.real = Va + Vb + Vc;
    Vabc.imag = 0;
    complex_t W1, W2, W3;
    W1.real = cos(2 * PI / 3);
    W1.imag = sin(2 * PI / 3);
    W2.real = cos(4 * PI / 3);
    W2.imag = sin(4 * PI / 3);
    complex_multiply(Vabc, W1, &Van);
    complex_multiply(Vabc, W2, &Vbn);
    Vcn.real = -Van.real - Vbn.real;
    Vcn.imag = -Van.imag - Vbn.imag;

    // 计算负序电压
    complex_t Vun, Vvn, Vwn;
    W3.real = cos(PI);
    W3.imag = sin(PI);
    complex_multiply(Van, W3, &Vun);
    complex_multiply(Vbn, W3, &Vvn);
    complex_multiply(Vcn, W3, &Vwn);

    // 输出正负序电压
    printf("Van=%f+j%f\n", Van.real, Van.imag);
    printf("Vbn=%f+j%f\n", Vbn.real, Vbn.imag);
    printf("Vcn=%f+j%f\n", Vcn.real, Vcn.imag);
    printf("Vun=%f+j%f\n", Vun.real, Vun.imag);
    printf("Vvn=%f+j%f\n", Vvn.real, Vvn.imag);
    printf("Vwn=%f+j%f\n", Vwn.real, Vwn.imag);

    return 0;
}

此程序使用了FIR滤波器对三相电压进行了采样和滤波，然后根据正负序电压的计算公式计算出正负序电压。需要注意的是，此程序只是示例参考，实际的实现方法需要根据具体的DSP芯片型号和开发环境进行修改。