A renewable energy cooling, heating and power microgrid system and control method

A renewable energy, cooling and heating technology, applied in wind power generation, energy storage, refrigerators, etc., can solve problems such as poor system reliability, waste of electric energy, and low energy utilization

CN104716644BActive Publication Date: 2017-01-11SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-01-11

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Abstract

The invention discloses a renewable energy source cooling, heating and power microgrid system and a control method. The renewable energy source cooling, heating and power microgrid system comprises a power module and a cooling / heating module. According to the power module, a solar power generation system is sequentially connected with a DC / DC converter and a DC / AC converter in series and then connected with an AC bus, a wind power generation system is sequentially connected with an AC / DC converter and a DC / AC converter and then connected with the AC bus, a gas internal combustion generation system is directly connected with the AC bus, a storage battery pack is connected with the AC bus through a bi-directional DC / AC converter, variable power electricity storage hot water tanks are connected with the AC bus, and the AC bus is connected with a power distribution network through a PCC. The renewable energy source cooling, heating and power microgrid system and the control method have the advantages that clean renewable energy sources such as methane, wind energy and solar energy are adopted as energy sources of a cooling, heating and power microgrid, no pollution is caused to the environment, operation cost is very low, and the application range is wide; by the adoption of a multi-microsource energy supply mode, the problem of capacity allocation redundancy of a single energy supply system can be solved.
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Description

technical field

[0001] The invention relates to the technical field of renewable energy power generation, in particular to a multi-energy-driven renewable energy cooling, heating and power microgrid system and a control method. Background technique

[0002] 1. The micro-grid system of cooling, heating and electricity is based on the cascade utilization of energy and the coordinated operation of various micro-sources. The multi-energy forms cooperate with each other to provide users with three kinds of energy: cold, heat and electricity at the same time, which can not only improve the efficiency of the system Operating efficiency, reducing energy waste, can also greatly improve the stability of system operation.

[0003] 2. Most of my country's combined cooling, heating and power systems use gas turbines as prime movers, but when the capacity is small (such as 30kW to 50kW), internal combustion engines have obvious advantages over micro gas turbines in terms of efficiency, pe...

Examples

Embodiment Construction

[0053] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0054] The cold and hot power microgrid system is composed of two parts: the electric module and the cold / heat module.

[0055] Electric modules include solar panels, wind generators, gas internal combustion generator sets, battery packs, electric hot water storage tanks, electric loads, etc. The power generation and energy storage units are connected together by an AC bus (380V, 50Hz). The specific connection method is as figure 1 Shown: The solar power generation system is connected to the AC bus bar after DC-DC-AC conversion, the wind power generator is connected to the AC bus bar after AC-DC-AC conversion, the gas internal combustion generator set is directly connected to the AC bus bar, and the battery pack is connected to the AC bus bar through two-way DC - The AC converter is connected to the AC bus. The AC bus is connected to the distribution netwo...