Please check with the power company to be certain this is your responsibility. Also, contact the electrical inspector before buying any materials or starting any work.
I can only make suggestions as every jurisdiction has their own rules and regulations. You can use my suggestions for your material list and to shop for the best price. You should contact a licensed and insured electrician or contractor. They can verify your project is NEC compliant and you can proceed.
A 150 amp service requires 2/0 aluminum or #1 copper conductors. Article 310.15(B)(6).
This distance is substantial. Using this voltage drop calculator, http://www.southwire.com/support/vol...calculator.htm
, you will need 4/0 aluminum or 2/0 copper conductors. (wires). Direct buried or in conduit. This is calculated at 3% drop.
There are several types of wire suitable for this project. Aluminum direct burial wire is by far the least expensive and the most widely used. You must ask your electrician or do some shopping for the type wire you can/want to use. PVC conduit is great, but really not required for this. PVC shedule 80 should be used whenever the wires leave the ground to enter an enclosure such as the meter can or disconnect on the opposite end. This is (schedule 80) only required when the conduit is "subject to physical damage". Like mowers and other equipment.
These conductors direct buried shall be at least 24" below grade. Table 300.5
Once again. Please check your local ordinances.