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User side distributed power plug and play power management system based on photovoltaic system

A distributed power supply, plug-and-play technology, applied in photovoltaic power generation, single-grid parallel feeding arrangement, etc., can solve the problem of difficulty in guaranteeing the power quality of the power grid

Active Publication Date: 2015-09-09
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of smart grid, in the future power system, the proportion of distributed power supply will be higher and higher, and the massive access of distributed power supply requires its rapid plug-and-play and strong standardization. Power access will make it difficult to guarantee the power quality of the power grid. It is of great significance to study and solve various practical problems caused by distributed power access. By researching reasonable plug-and-play solutions, these effects can be alleviated or even eliminated, that is, It means that distributed power can be connected in a better way to meet new needs

Method used

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  • User side distributed power plug and play power management system based on photovoltaic system
  • User side distributed power plug and play power management system based on photovoltaic system

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Embodiment Construction

[0021] Such as figure 1 As shown, the block diagram mainly includes 4 parts

[0022] (1) Photovoltaic array: It is used to provide energy sources for distributed power sources. In small household photovoltaic systems, roof-mounted solar arrays can be considered.

[0023] (2) Energy storage battery pack and its inverter (optional): It is used to assist in reducing the negative impact on the external power grid and load when the distributed power is connected to the grid, and to ensure the reliable operation of the load and the system.

[0024] (3) Photovoltaic inverter with plug-and-play function: the part in the pink dotted line box in the figure is a new type of inverter system designed in consideration of the plug-and-play characteristics of the user-side distributed power supply , we integrate the function of the plug-and-play part with the design of the inverter. In addition to the function of photovoltaic inverter, it also has the self-regulation function of plug-and-pla...

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Abstract

The invention provides a photovoltaic system based plug and play power management system of user side distributed power sources, which comprises a photovoltaic array, an energy storage unit, and a plug and play inverter which is respectively matched with the photovoltaic array and the energy storage unit, and an instant communication function of the inverter and a remote electric power dispatching center is realized through the communication interface of the inverter so as to reach the plug and play effect and the energy control function of a local power management system, and the energy storage unit plays an aided role. According to the photovoltaic system based plug and play power management system of the user side distributed power sources, provided by the invention, the voltage peak changes in grid-tied and off-grid processes are processed with a rapid sampling and algorithm of software by means of tracking instant impulse voltage and current changes instantly generated by the distributed power sources in the grid-tied and off-grid processes, and the inverter is controlled to run in a way of current source, so that active / reactive power control of the distributed power sources can be realized, finally, the influences can be relieved or eliminated, and the purpose of the plug and play effect and the energy control of the system is realized.

Description

technical field [0001] The invention belongs to the field of smart grids, and in particular relates to a user-side distributed power plug-and-play power management system based on a photovoltaic system. Background technique [0002] With the rapid development of smart grid, in the future power system, the proportion of distributed power supply will be higher and higher, and the massive access of distributed power supply requires its rapid plug-and-play and strong standardization. Power access will make it difficult to guarantee the power quality of the power grid. It is of great significance to study and solve various practical problems caused by distributed power access. By researching reasonable plug-and-play solutions, these effects can be alleviated or even eliminated, that is, It means that distributed power can be connected in a better way to meet new needs. [0003] 1. Plug and play technology [0004] Plug and Play is a feature developed by Microsoft for Windows 95...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCY02E10/563Y02E10/56
Inventor 郭明珠田世明
Owner CHINA ELECTRIC POWER RES INST
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