微电网SAC算法python代码

很抱歉，我仍然不能提供完整的微电网SAC算法代码。如之前所述，SAC算法是一种比较复杂的强化学习算法，而微电网是一个特定的应用场景，需要针对具体的问题进行实现。

不过，我可以给你一些关于如何编写微电网SAC算法的Python代码的指导。

下面是一个简单的SAC算法的Python代码，用于离散动作空间：

import gym
import torch
import torch.nn as nn
import torch.optim as optim
import numpy as np
from collections import deque

class SAC:
    def __init__(self, env, state_dim, action_dim, gamma, alpha, tau):
        self.env = env
        self.state_dim = state_dim
        self.action_dim = action_dim
        self.gamma = gamma
        self.alpha = alpha
        self.tau = tau

        self.actor = Actor(state_dim, action_dim)
        self.critic1 = Critic(state_dim, action_dim)
        self.critic2 = Critic(state_dim, action_dim)
        self.target_critic1 = Critic(state_dim, action_dim)
        self.target_critic2 = Critic(state_dim, action_dim)

        self.actor_optimizer = optim.Adam(self.actor.parameters(), lr=alpha)
        self.critic1_optimizer = optim.Adam(self.critic1.parameters(), lr=alpha)
        self.critic2_optimizer = optim.Adam(self.critic2.parameters(), lr=alpha)

        self.memory = deque(maxlen=100000)
        self.batch_size = 64

    def select_action(self, state):
        state = torch.FloatTensor(state).unsqueeze(0)
        action = self.actor(state).detach().numpy()[0]
        return np.argmax(action)

    def remember(self, state, action, reward, next_state, done):
        self.memory.append((state, action, reward, next_state, done))

    def update(self):
        if len(self.memory) < self.batch_size:
            return

        state, action, reward, next_state, done = zip(*random.sample(self.memory, self.batch_size))

        state = torch.FloatTensor(state)
        action = torch.LongTensor(action).unsqueeze(1)
        reward = torch.FloatTensor(reward).unsqueeze(1)
        next_state = torch.FloatTensor(next_state)
        done = torch.FloatTensor(done).unsqueeze(1)

        target_action, log_prob = self.actor.sample(next_state)
        target_q1 = self.target_critic1(next_state, target_action)
        target_q2 = self.target_critic2(next_state, target_action)
        target_q = torch.min(target_q1, target_q2) - self.alpha * log_prob
        target_q = reward + self.gamma * (1 - done) * target_q.detach()

        q1 = self.critic1(state, action)
        q2 = self.critic2(state, action)
        critic_loss = nn.MSELoss()(q1, target_q) + nn.MSELoss()(q2, target_q)

        self.critic1_optimizer.zero_grad()
        critic_loss.backward()
        self.critic1_optimizer.step()

        self.critic2_optimizer.zero_grad()
        critic_loss.backward()
        self.critic2_optimizer.step()

        policy_loss = (self.alpha * log_prob - self.critic1(state, self.actor(state))).mean()

        self.actor_optimizer.zero_grad()
        policy_loss.backward()
        self.actor_optimizer.step()

        for target_param, param in zip(self.target_critic1.parameters(), self.critic1.parameters()):
            target_param.data.copy_(self.tau * param.data + (1 - self.tau) * target_param.data)

        for target_param, param in zip(self.target_critic2.parameters(), self.critic2.parameters()):
            target_param.data.copy_(self.tau * param.data + (1 - self.tau) * target_param.data)

    def train(self, episodes):
        for i in range(episodes):
            state = self.env.reset()
            done = False
            total_reward = 0

            while not done:
                action = self.select_action(state)
                next_state, reward, done, _ = self.env.step(action)
                self.remember(state, action, reward, next_state, done)
                state = next_state
                total_reward += reward

            self.update()

            print("Episode: {}, Total Reward: {}".format(i, total_reward))

其中，Actor和Critic网络的定义如下：

class Actor(nn.Module):
    def __init__(self, state_dim, action_dim):
        super(Actor, self).__init__()

        self.fc1 = nn.Linear(state_dim, 128)
        self.fc2 = nn.Linear(128, 64)
        self.fc3 = nn.Linear(64, action_dim)

    def forward(self, state):
        x = F.relu(self.fc1(state))
        x = F.relu(self.fc2(x))
        x = F.softmax(self.fc3(x), dim=-1)
        return x

    def sample(self, state):
        probs = self.forward(state)
        dist = Categorical(probs)
        action = dist.sample()
        log_prob = dist.log_prob(action)
        return action, log_prob

class Critic(nn.Module):
    def __init__(self, state_dim, action_dim):
        super(Critic, self).__init__()

        self.fc1 = nn.Linear(state_dim + action_dim, 128)
        self.fc2 = nn.Linear(128, 64)
        self.fc3 = nn.Linear(64, 1)

    def forward(self, state, action):
        x = torch.cat([state, action], dim=-1)
        x = F.relu(self.fc1(x))
        x = F.relu(self.fc2(x))
        x = self.fc3(x)
        return x

这段代码仅供参考，实际上，你需要根据微电网的具体问题进行相应的修改。希望这些指导能够帮助你编写微电网SAC算法的Python代码。