A power plant stands for energy, drive and the source that keeps everything running. Dream books read it as your own reserves — how much you produce and how much is being drawn from you.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.