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Low-voltage grid connection integrated intelligent control system for distributed power

An intelligent control system, distributed power technology, applied in electrical components, circuit devices, AC network circuits, etc., to achieve the effect of ensuring safety

Inactive Publication Date: 2018-06-29
杭州国电能源环境设计研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and propose a safe and reliable integrated intelligent control system for the unified planning of all distributed power sources that adopt low-voltage grid-connected, so as to solve the standardized management of the distributed power supply to the power distribution system. question

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  • Low-voltage grid connection integrated intelligent control system for distributed power

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Embodiment Construction

[0020] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0021] The distributed power supply low-voltage grid-connected integrated intelligent control system provided in this embodiment adopts the following design concepts:

[0022] ——Real-time sampling of 0.4 kV three-phase current and three-phase voltage signals on both sides of the distributed power supply side and the grid connection side;

[0023] ——Analysis and comparison of power quality matching between the distributed power source side and the grid connection side, including the accurate comparison of the six parameters of voltage amplitude, current harmonics, phase angle, frequency, synchronization, and power factor on both sides , So as to determine whether the power quality of the distributed power source matches the power quality of the grid connection side;

[0024] —— Output the above calculation and analysis results, and...

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Abstract

The invention discloses a low-voltage grid connection integrated intelligent control system for distributed power, comprising: a sampling unit for acquiring, in real time, current and voltage for a distributed power side and a grid connection side; an electricity quality comparison and analysis management control unit for performing electricity quality matching analysis and comparison on the distributed power side and the grid connection side and judging whether equality of electricity sent by distributed power matches with the quality of electricity of the grid connection side; an executive unit for sending out a control command according to analytical and comparison results; a control signal output unit for receiving the control command and sending out a final executive command. Uniformplanning is provided for all distributed powers using low-voltage grid connection, so that the problem of standard management for power transmission from a distributed power to a power distribution system is solved. The core concept herein is to provide real-time acquisition, calculation and analysis for the information of two sides of a grid-connected system; it is ensured that grid-connected operation is facilitated at the premise of the distributed power issues electricity with quality meeting the quality of electricity of the grid connection side; grid connection of the distributed power is prohibited when the quality of electricity of the grid connection side is not met.

Description

Technical field [0001] The present invention relates to the technical field of low-voltage grid-connected distributed power sources, in particular to a safe and reliable integrated intelligent control system, whereby all distributed power sources that adopt low-voltage grid-connected are planned in a unified manner to realize the transmission of distributed power sources to the distribution system Standardized management of electric energy. Background technique [0002] In recent years, the number of low-voltage grid-connected distributed power sources in China has increased (the low-voltage referred to in the present invention mainly refers to 400 volts and 220 volts). Since the country has not issued a unified grid-connected control system standard, many distributed power sources are connected to the grid system by low-voltage grid-connected methods, which has seriously affected the safety of the low-voltage power distribution system of the grid. Summary of the invention [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCH02J3/381
Inventor 邓金勇
Owner 杭州国电能源环境设计研究院有限公司