1. 1 Distributed Generation SWEDE 2006 CenterPoint Energy Walter R. Bartel, P.E. Supervising Engineer Distribution System Reliability

2. 2 The Rules Public Utility Commission of Texas Substantive Rules: –PUC Rule 25.211General Description –PUC Rule 25.212Technical Requirements Size Range: up to 10 MW Voltage Range: 120 Volts to 34,500 Volts Generator Types: Solar Panels, Wind Turbines, Fuel Cells, Micro-Turbines, Reciprocating Engines, Turbines Generator Fuels: Gas, Solar, Wind, Diesel, Bio-Diesel Intended Use: Net Metered or Export

3. 3 The Process DG equipment is reviewed for technical compliance. Studies are performed to determine CNP system impacts. CNP system modifications are developed (w/estimates). DG provides payment for CNP system modifications. CNP completes modifications while DG installs equipment. DG site inspections/approvals are performed. DG signs interconnection agreement and is allowed to operate. DG performance and addresses issues as necessary.

4. 4 Existing DG Facilities on CNP System FUELTECHNOLOGYDG'sCAPACITY (KW) LARGE (KW) SMALL (KW) DIESELENGINE510,2503,000250 GASENGINE724,8107,470140 LANDFILL GAS ENGINE317,5849,9843,800 GASFUEL CELL3570200170 GASMICROTURBINE1210 SOLARPV568.5441 SOLAR, WIND PV, INVERTER1333 WIND 352401.8 SYSTEM TOTALS 2853,547.3

6. V16 ENGINE BURNS LANDFILL GAS 1600 KW GENERATOR

7. 5,000 KW GENERATOR AND TURBINE BOILER MAKES STEAM

8. 250 KW FUEL CELL

9. 170 KW DG at oil field Burns waste natural gas to power oil pumps

10. 1 KW SOLAR PANELS MICRO DG INSTALLATION

11. 50 KW SOLAR PANELS

12. 12 Questions