AppleScript: How to reload a Safari window without bring the window to the foreground while I am on other Desktop space

Question

I want to write an AppleScript to achive a simple task. That is, I open a Safari window on Desktop 1 and automatically reload every 30 minutes while I do my dialy work on desktop 2.
Here is my script:
tell application "Safari"
    activate
    tell application "System Events"
        tell process "Safari"
            keystroke "r" using {command down}
        end tell
    end tell
end tell
This script works. However, whenever the script is executed, my current Desktop 2 will be brought back to Desktop 1. It is distracting to my workflow.
Is there any way to just let Safari to reload in the background without bring Safari window to foreground on Desktop 1?
I have done a coumple of researches; many of them say I should not use "activate" in my script. I tried that but then the script will just do nothing.

Answer 1

Hi, Hiroto
your approach works perfectly fine. Thank you.
I just found there is also a more generic approach without tweaking of javascript or any third party scripting language involed:
#!/usr/bin/osascript
tell application "Safari"
    set docUrl to URL of document 1
    set URL of document 1 to docUrl
end tell
From there, I can do a simple cron job task now.