With the large-scale integration of new energy sources

multi-energy complementary is an inevitable trend of power grid development. For cogeneration plants with multiple parallel operating units

they are faced with plant-level load distribution issues. By studying the operating characteristics of photovoltaic power plants and gas-steam combined cycle units

the scheduling limits are determined in this paper. The typical daily load curve is selected to complete the scheduling calculation for multi-energy complementary system

and the real-time load distribution results are obtained. Meanwhile

the optimal combination mode can be obtained through the research on different operation combination modes under the same load. The simulation calculations show that

the gas consumption of double-condensing unit operation mode is the least

followed by a back and a condensing unit operation mode. The gas consumption of three-unit operating mode is the most. Therefore

within the operating limits

the double-condensing unit operation mode should be preferred. The three-unit operating mode should be operated simultaneously during the period of 11:00—22:00 to effectively reduce the number of starts and stops. It provides data and theoretical support for heat-electric load distribution while achieving energy saving and consumption reduction.