Distributed electric-thermal coupling energy storage heat supply system

Abstract

The invention discloses a distributed electric-thermal coupling energy storage heat supply system. The system comprises a power network, multiple power plants/power stations, power transmission lines and multiple distributed energy storage heat stations; the power plants/power stations are all connected to the power network through the power transmission lines, and the distributed energy storage heat stations are connected with the power network or the power plants/power stations; each distributed energy storage heat station comprises a first-stage electric-thermal coupling energy storage heat exchanger, a first-stage thermal circulation pump, a second-stage heat exchanger, a second-stage thrall circulation pump, a third-stage heat exchanger, a heat supply network circulation pump and connecting pipelines used for being connected to multiple external heat supply network user-side radiators. Compared with a traditional combined heat and power generation heat supply system, the system has the advantages that a large amount of wind power abandoned wind abandoning, photovoltaic light abandoning and thermal power valley redundant electricity is utilized and converted into heat energy through an electric-thermal converter which is resistant to heat storage media such as high temperature oil and soluble salt, and the conversion efficiency reaches 98%.

Description

technical field [0001] The invention relates to the fields of power supply and heat supply, in particular to a distributed electric-thermal coupled energy storage heat supply system for energy networking and energy saving. Background technique [0002] At present, the main contradiction facing the development of wind power and photovoltaic power generation in my country is still the problem of curtailment of wind power and curtailment of solar power. The problem of the huge amount of abandoned air during the winter heating period in the "Three North Regions" (ie Northeast, North China and Northwest China) is particularly prominent. The main reason is that the "Three North Regions" have sufficient wind energy resources but the transmission channels of the power grid are limited, and it is very difficult to send wind power and photovoltaic power to the outside world; It also leads to the waste of wind power and photovoltaic energy. [0003] In terms of heat users, the main p...

AI Technical Summary

Problems solved by technology

The combined heat and power system that complements wind, gas, and storage improves energy utilization and system stability, and to a certain extent solves the technical contradiction of "using heat to determine power", but the system is complex, expensive, and difficult to promote and apply on a large scale bigger

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