https://help.realvnc.com/hc/en-us/articles/28401208368413-Resolving-the-Sleep-is-enabled-warning-in-RealVNC-Server

powercfg /query SCHEME_CURRENT SUB_SLEEP
这个命令会查询并显示你当前活跃电源方案的所有与睡眠相关的电源设置，而不仅仅是某个特定设置。
要更改设置以禁用任何睡眠命令，请在PowerShell窗口中运行以下作。

# Disable all timeouts for maximum "always on" configuration
powercfg /change standby-timeout-ac 0
powercfg /change standby-timeout-dc 0
powercfg /change monitor-timeout-ac 0
powercfg /change monitor-timeout-dc 0
powercfg /change disk-timeout-ac 0
powercfg /change disk-timeout-dc 0
powercfg /change hibernate-timeout-ac 0
powercfg /change hibernate-timeout-dc 0