mppt 粒子群算法 C语言实现代码

以下是一个简单的MPPT粒子群算法的C语言实现代码：

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

#define PI 3.1415926
#define MAX_ITERATION 50
#define POPULATION_SIZE 10

typedef struct {
    double curr_pos;
    double curr_vel;
    double pbest_pos;
    double pbest_fitness;
} Particle;

double SineWave(double time);
double FitnessFunction(double power, double voltage);
double GetRandomNumber(double min, double max);
void InitializePopulation(Particle population[], int size, double min_pos, double max_pos, double min_vel, double max_vel);
void UpdateParticle(Particle *particle, double gbest_pos, double alpha, double beta, double min_pos, double max_pos, double min_vel, double max_vel);
void UpdateGlobalBest(Particle population[], int size, double *gbest_pos, double *gbest_fitness);
void MPPT(double *voltage, double *power, double irradiance, double temperature);

int main()
{
    double voltage, power;
    double irradiance = 1000; // 光照强度为1000W/㎡
    double temperature = 25; // 温度为25℃
    
    MPPT(&voltage, &power, irradiance, temperature);
    
    printf("Voltage: %.2fV\n", voltage);
    printf("Power: %.2fW\n", power);
    
    return 0;
}

double SineWave(double time)
{
    return 1000 * sin(2 * PI * 50 * time); // 此处生成的是50Hz的正弦波
}

double FitnessFunction(double power, double voltage)
{
    return power / voltage;
}

double GetRandomNumber(double min, double max)
{
    return ((double) rand() / RAND_MAX) * (max - min) + min;
}

void InitializePopulation(Particle population[], int size, double min_pos, double max_pos, double min_vel, double max_vel)
{
    srand(time(NULL));
    
    for (int i = 0; i < size; i++) {
        population[i].curr_pos = GetRandomNumber(min_pos, max_pos);
        population[i].curr_vel = GetRandomNumber(min_vel, max_vel);
        population[i].pbest_pos = population[i].curr_pos;
        population[i].pbest_fitness = FitnessFunction(SineWave(population[i].curr_pos), population[i].curr_pos);
    }
}

void UpdateParticle(Particle *particle, double gbest_pos, double alpha, double beta, double min_pos, double max_pos, double min_vel, double max_vel)
{
    double r1 = GetRandomNumber(0, 1);
    double r2 = GetRandomNumber(0, 1);
    double vel = particle->curr_vel + alpha * r1 * (particle->pbest_pos - particle->curr_pos) + beta * r2 * (gbest_pos - particle->curr_pos);
    
    if (vel < min_vel) {
        vel = min_vel;
    } else if (vel > max_vel) {
        vel = max_vel;
    }
    
    double pos = particle->curr_pos + vel;
    
    if (pos < min_pos) {
        pos = min_pos;
    } else if (pos > max_pos) {
        pos = max_pos;
    }
    
    double fitness = FitnessFunction(SineWave(pos), pos);
    
    if (fitness > particle->pbest_fitness) {
        particle->pbest_pos = pos;
        particle->pbest_fitness = fitness;
    }
    
    particle->curr_pos = pos;
    particle->curr_vel = vel;
}

void UpdateGlobalBest(Particle population[], int size, double *gbest_pos, double *gbest_fitness)
{
    for (int i = 0; i < size; i++) {
        if (population[i].pbest_fitness > *gbest_fitness) {
            *gbest_pos = population[i].pbest_pos;
            *gbest_fitness = population[i].pbest_fitness;
        }
    }
}

void MPPT(double *voltage, double *power, double irradiance, double temperature)
{
    double alpha = 0.5;
    double beta = 0.5;
    double min_pos = 0;
    double max_pos = 1;
    double min_vel = -0.1;
    double max_vel = 0.1;
    double gbest_pos = 0;
    double gbest_fitness = 0;
    Particle population[POPULATION_SIZE];
    
    InitializePopulation(population, POPULATION_SIZE, min_pos, max_pos, min_vel, max_vel);
    
    for (int i = 0; i < MAX_ITERATION; i++) {
        for (int j = 0; j < POPULATION_SIZE; j++) {
            UpdateParticle(&population[j], gbest_pos, alpha, beta, min_pos, max_pos, min_vel, max_vel);
        }
        
        UpdateGlobalBest(population, POPULATION_SIZE, &gbest_pos, &gbest_fitness);
    }
    
    *voltage = gbest_pos;
    *power = SineWave(gbest_pos);
}

注：以上代码仅供参考。实际使用中，需要根据具体的需求进行调整和优化。