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Microgrid testing system

A test system and micro-grid technology, applied in the field of micro-grid test system, can solve the problems that the supplementary effect of the micro-grid on the power grid is not fully reflected, and the power grid has no effective means to completely eliminate the power flow and power quality of the micro-grid power grid, so as to improve the reliability of power supply. the effect of reducing investment

Active Publication Date: 2013-04-17
STATE GRID HEBEI ELECTRIC POWER RES INST +2
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AI Technical Summary

Problems solved by technology

[0005] Faced with the increasing demand for micro-grid access, the grid has no effective means to completely eliminate the influence of the micro-grid on the power flow and power quality of the grid.
The supplementary effect of the microgrid to the power grid has not yet been fully reflected

Method used

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0032] See attached figure 1 , the present invention includes a photovoltaic power generation system, a main energy storage battery system, a power quality management system, a large power load 14, an AC charging pile 20, an ordinary load 17, a supercapacitor 13, a reserved AC bus 4, a reserved DC bus 3 and micro Grid bus 2;

[0033] The micro-grid bus 2 has an AC voltage of 400V, and is connected to the large power grid system through the PCC grid-connected point switch 5;

[0034] The power quality management system includes an APF (active filter device) 10 and an SVG (static var compensation device) 11. The APF and SVG are connected to the microgrid bus 2 through a contact switch 9, and the APF, SVG and the microgrid bus 2 are respectively provided with a current transformer 22, and the microgrid bus 2 is also provided with a voltage sens...

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Abstract

The invention discloses a microgrid testing system, which comprises a photovoltaic power generation system, a main energy storage battery system, a power quality management system, a large-sized power load, a super capacitor, a reserved alternating current (AC) bus, a reserved direct current (DC) bus, a microgrid bus and the like. The power quality management system comprises an active power filter (APF) and a static var generator (SVG); the microgrid bus is also provided with a voltage sensor and current transformers; the large-sized power load accesses to the microgrid bus through a variable frequency starting device; a connecting line of the variable frequency starting device and the microgrid bus is provided with a first current transformer; the reserved DC bus accesses to the microgrid DC / AC inverters and solid-state relays; and the photovoltaic power generation system and the main energy storage battery system access to the microgrid bus through interconnection switches. By adopting the microgrid testing system disclosed by the invention, experimental researches, such as microgrid coordinated operation, grid-connected and off-grid control and switching, off-grid belt large-sized power load black start microgrid power quality management and the like, can be conveniently performed, and a testing basis is provided to the popularization and application of a microgrid.

Description

technical field [0001] The invention relates to the technical field of distributed power generation, energy storage and microgrid, in particular to a microgrid test system with large power load. Background technique [0002] The development of distributed power generation plays a very important role in optimizing my country's energy structure, realizing diversification of energy supply, coping with climate change, protecting the ecological environment, and promoting sustainable economic and social development. It is also the basis for implementing the scientific development concept and building a resource-saving society. Require. With the development of low-carbon economy, my country's distributed power generation has ushered in a stage of rapid development. However, the simple grid connection of a large number of distributed power generation with various forms and performances will have an impact on the power grid and users, and have adverse effects on power quality, system...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/32H02J3/18H02J3/01
CPCY02E10/56Y02E40/30Y02E40/40Y02E70/30Y02P80/14
Inventor 孟良高志强王文新孙中记范辉梁宾唐宝锋
Owner STATE GRID HEBEI ELECTRIC POWER RES INST
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