I want to get about 150000 ropsten ether for testing. Is there any way to get it? I've seen some faucet websites but they have limitations.
It will be very hard, if not impossible, to get 150,000 RETH. Your best bet will be to use a private chain and configure an account to have this amount. You would do this by doing the following:
In your case, this would be something like: