Phase change heat storage system and control method thereof

Abstract

The invention relates to a phase change heat storage system and a control method thereof. The phase change heat storage system comprises an electric boiler, a first heat exchange device, a heat storage device, a second heat exchange device, a user side heat exchanger and a master control module, all of which are connected through pipelines. The master control module is used for controlling starting and stopping of the electric boiler and starting and stopping of the first heat exchange device or the second heat exchange device according to the actual power consumption condition of a power grid and the actual temperature of a heat storage material in the heat storage device so as to change the working states of the electric boiler and the heat storage device. The system further comprises a current adjusting module used for adjusting the working current of the electric boiler to enable the actual outlet temperature of the electric boiler to be the target outlet temperature of the electric boiler. According to the technical scheme, the current adjusting module adopts a double closed-loop structure of PID control and PI control, the temperature control response speed of the electric boiler in the phase change heat storage system is increased, meanwhile, the master control module and the current adjusting module of the system are adjusted and controlled by a power grid dispatching center, and therefore the aim that the system participates in power system dispatching is achieved.

Description

technical field [0001] The invention relates to the field of heat storage station control, in particular to a phase change heat storage system and a control method thereof. Background technique [0002] In areas rich in intermittent renewable energy such as wind power and photovoltaics, intermittent renewable energy such as wind power and photovoltaics is mainly used for power generation. For the problem of light abandonment, the application of phase change thermal storage stations has greatly improved the phenomenon of abandoning wind and light in new energy power generation. [0003] At present, the relevant local control technology of the phase change heat storage station is relatively mature, which can ensure its normal operation. [0004] However, there are still some problems in the control technology of the phase change heat storage station: for example, the response speed of the control technology of the phase change heat storage station is slow, and the phase chang...

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Problems solved by technology

[0004] However, there are still some problems in the control technology of the phase change heat storage station: for example, the response speed of the control technology of the phase change heat storage station is slow, and the phase change heat storage station, as an important electric heating load in the power grid, fails to participate in the power system well. scheduling, etc.

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