Punjab State Power Corporation [PSPCL] — sundry charges incurred in bill

Address: 140507

Website: www.pspcl.in

Dear sir

Consumer no. Z21gt210258p, bill generated for mar'18, bill dt 23-mar & bill no. 000046 has incurred sundry charges of rs 3313 in total bill amount rs 5170.
Need to know reasons for what these charges are meant, as i have a clear payment past record.
Also observed you were charging nominal sundry charges every month, pls give reasons.