Dual-mode decoupling-based combined heat and power system and wind power consumption method thereof

Abstract

The invention provides a dual-mode decoupling-based combined heat and power system and a wind power consumption method thereof, and relates to the technical field of combined heat and power systems. The system involves a gas turbine, a waste heat recovery device, a heat storage device, a proton exchange membrane fuel cell, power-converting-into-gas equipment and a wind power generator; the heat storage device, the proton exchange membrane fuel cell and the power-converting-into-gas equipment decouple two operation modes of 'power determined through heat' and 'heat determined through power' ofa combined heat and power set; and the wind power consumption capacity of the system is improved by decoupling a heat-power coupling relation, the lowest values of the system energy purchasing cost and the pollution gas treatment cost are used for an objective function, an electrical load is used for preferentially consuming wind power, and residual wind power is further consumed through the power-converting-into-gas equipment. According to the dual-mode decoupling-based combined heat and power system and the wind power consumption method thereof, curtailed wind power energy of the system canbe consumed in a large scale, the two operation modes of 'power determined through heat' and 'heat determined through power' are decoupled, and wind power - gas - power bidirectional conversion is realized; and the self-regulation reserve capacity of the system can be improved, and the interference resistance to renewable energy output random fluctuation of the system is enhanced.

Description

technical field [0001] The invention relates to the technical field of cogeneration systems, in particular to a cogeneration system based on dual-mode decoupling and a method for accommodating wind power. Background technique [0002] There are large temperature differences in the four seasons in the east and west of my country, rich scenery resources, and a high degree of overlap between the windy period and the heating period in winter. In order to meet the heating needs of users in winter and reduce the environmental pollution caused by heating, a large number of combined heat and power (CHP) systems with "gas turbines" as the core have been built in these areas. However, in order to meet the heating needs of users in winter, the combined heat and power units in the system will operate in the "heat-fixed power" operation mode, which will further reduce the amount of wind power connected to the grid at night and exacerbate the occurrence of wind power abandonment. At the ...

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Problems solved by technology

[0003] At present, the methods of improving the wind power consumption capacity of the combined heat and power system and decoupling the operation mode of "heating power" of the combined heat and power unit are all considered and studied from the side of "thermal energy", that is, adding Heat storage equipment or heat storage and electric boiler equipment, this method is characterized by converting excess wind power into heat energy for storage and utilization, but it is difficult to achieve two-way conversion of "heat and electricity"

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