New Hampshire’s largest utility estimates customers will see a two percent average rate hike this year. Public Service of New Hampshire filed its rate adjustment forecast with the Public Utilities Commission Friday. PSNH says higher energy prices over the winter and continued volatility in the market could translate into higher power bills. The utility has not yet requested a rate change from the PUC. Friday’s preliminary filing lays the groundwork for next month’s formal request, when the Utilities Commission will consider updated numbers and how much customers will pay starting July 1st.