Laboratory microgrid system

Abstract

The invention discloses a laboratory microgrid system which can provide lots of theoretical and experimental bases for large-scale and high-efficiency utilization of renewable energy sources and construction of the microgrid in China. The laboratory microgrid system comprises a dummy bus; corresponding interconnection switches on the dummy bus are respectively connected with an analog wind power generation system, an analog solar power generation system, an analog generator system, an analog storage battery energy storage system, an analog load system and an analog electric power quality control system; the dummy bus is also connected with a power transmission network through a corresponding interconnection switch by virtue of a bidirectional kilowatt-hour meter; and thus the laboratory microgrid system is formed. A microgrid controller is connected with all the interconnection switches, carries out control operations according to one or more of grid-connected operation control strategy or stabilization control strategy during grid-isolated operation or active regulation and reactive optimization control strategy or grid-connected / isolated mode switching strategy or multi-power-supply coordination control strategy and energy optimal management strategy, and coordinates and controls a renewable energy source grid-connected device and an electric power quality control device so as to complete renewable energy source grid-connected harmonic suppression and voltage disturbance resistance.

Description

[0001] technical field [0002] The invention relates to a power system, in particular to a laboratory micro-grid system. Background technique [0003] Human production and living energy mainly rely on fossil fuels, including oil, natural gas, coal and other natural, non-renewable energy sources. Since fossil fuels need to be formed after thousands of years, coupled with the increasing population, fossil fuels will be exhausted soon, and human beings will face the problem of energy shortage. [0004] Electric energy is a clean and practical secondary energy source, which must undergo primary energy conversion. Solar energy, fire, wind energy, water, tide, nuclear energy, etc. can be converted into electrical energy. On the one hand, it solves the energy shortage, improves the energy structure, and reduces environmental pollution; on the other hand, wind energy and solar energy can be obtained locally, without transportation, pollution-free, and have great advantages. They ...

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Problems solved by technology

They will have an impact on the existing power system and generate some new issues: such as grid-connected standards and methods for micro-grids and grids, the impact of micro-grids on the grid after they are connected to the grid, monitoring, monitoring and regulation of distributed energy, and The operation control of the micro-grid itself, the transient stability and dynamic stability of the local power grid for the intermittent renewable energy universal access system are different from the traditional power grid, and the machine-grid coordination and dispatching, control mode, relay protection device and their cooperation all need to be carried out. Research and Discussion etc.

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