CHICAGO–(BUSINESS WIRE)–Beginning June 1, the average monthly residential customer bill in the ComEd service territory is expected to increase by $2 to $3 a month as a result of the annual PJM Interconnection capacity auction held last year. Rising capacity costs reflect a growing imbalance between rising energy demand and available generation, which is also driving up wholesale energy prices. These charges, which appear in the supply section of ComEd’s customers’ monthly bill, are not ComEd