Microgrid system having function of balancing energy and load

Abstract

The invention provides a microgrid system having a function of balancing energy and load. The microgrid system comprises a micro energy power generation system, a load system, a microgrid and a power balancing system, wherein the micro energy power generation system comprises a plurality of sets of parallel power generation equipment, and each set of power generation equipment comprises at least one photo-thermal power generation device; the power balancing system comprises a first control device, a second control device and an energy storage device; each photo-thermal power generation device comprises a solar thermal collector, a heat exchanger, a screw power machine, a generator connected with the screw power machine, a condenser, a first working medium pump and a second working medium pump; the energy storage device is parallelly connected with the corresponding solar thermal collector; and each energy storage device of the photo-thermal power generation device is a set of heat storage equipment. The microgrid system having the function of balancing energy and load can balance power of the micro energy power generation system and the load system through arranging the power balancing system, is fast in response speed, effectively reduces the impact of variations of electric energy and load on the microgrid, is simple, effective, stable and flexible, and is low in cost.

Description

technical field [0001] The invention relates to the field of energy generation and utilization, in particular to a micro-grid system with the function of adjusting energy and load balance. Background technique [0002] The traditional micro-grid system of distributed power generation (referred to as micro-grid) is a small-scale grid composed of various micro-power sources, energy storage devices, loads, protection and monitoring devices, etc., which can realize self-control, protection and management. The energy input form of the microgrid is mainly composed of some renewable energy sources such as solar energy, wind energy, and biomass. Due to its advantages of environmental protection, flexibility, less investment, and short cycle, it has received widespread attention. Because the energy composition of the microgrid is significantly different from that of the large power grid, many technologies are significantly different, and there are many special technical difficulties...

AI Technical Summary

Problems solved by technology

[0004] 2. The capacity of the large power grid is equivalent to infinite, and the sudden change in the load of individual users has little impact on the large power grid. However, the capacity of the microgrid is limited, the system inertia is small, and the damping is insufficient. The sudden change of the user's load has a significant impact on the power grid. If the impact is serious, the microgrid system will collapse and the power supply will not be able to function normally.

The discharge process is the opposite; when the microgrid is impacted by energy and load, it is mainly a drastic change in power, and it must be ensured that the input or output current is quickly adjusted under the condition of constant voltage. The characteristics of the battery limit the power regulation of the microgrid. The role of power supply and load mutation impact suppression is limited

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