Control method for combined cool, heat and power supply system comprising composite electricity and heat energy storage device

Abstract

The invention provides a control method for a combined cool, heat and power supply system comprising a composite electricity and heat energy storage device. The method includes the steps of obtainingload data, limiting the charging power of a power storage system, limiting the total storage amount of excess electric energy, charging a power grid during a low-electricity-price period, dischargingthe power storage system, storing heat in a heat storage system, releasing the heat in the heat storage system and the like. The provided control method is based on a control principle of increasing the operating load ratio of a combined clod, heat and power supply unit, increasing the utilization rate of an energy storage system and fully utilizing the low-valley electricity price, and optimizedmanagement of system energy distribution is carried out in combination with the power and capacity limitation of a power storage device and a heat storage device, so that the operating efficiency andenergy utilization efficiency of the unit are improved, the operating cost of the system is reduced, and the application of an electrothermal composite energy storage technology in an actual combinedcool, heat and power supply system can be effectively promoted.

Description

technical field [0001] The invention belongs to the field of distributed systems, and in particular relates to a control method for a combined cooling, heating and power supply system including an electrothermal composite energy storage device. Background technique [0002] Combined cooling, heating and power system (CCHP) is the most common application method of distributed systems. The combined cooling, heating and power unit is used as the main energy supply equipment, and combined with the power grid and gas pipeline network, it provides users with three energy sources: electricity, cooling and heating at the same time. . Since the CCHP system is close to the user, while the cogeneration unit generates electric energy, the waste heat can also be recovered by the recovery device to provide the heat energy required by the user. Therefore, cascade utilization of energy can be realized, the energy efficiency of the system can be improved, and environmental pollution can be r...

AI Technical Summary

Problems solved by technology

[0003] However, there is a strong coupling relationship between the electric energy and heat energy generated by the combined cooling, heating and power unit, and the user's demand for electric energy and heat energy is relatively random, and it is usually difficult to effectively match the two; in order to achieve "energy supply-energy" balance , most combined cooling, heating and power systems have problems such as low unit operation efficiency, low comprehensive energy utilization efficiency, and high energy cost

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