Monitoring method based on online monitoring system for power quality of wind farm connected to power grid booster station

A technology for connecting to the power grid and power quality, which is applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., and can solve problems such as systems and methods that cannot meet real-time online monitoring of power quality.

Active Publication Date: 2015-10-21
HEILONGJIANG ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problem that there is no system dedicated to online monitoring of the power quality of wind farms connected to the power grid in my country at present, and cannot satisfy the system and method for real-time power quality online monitoring of wind farms connected to the power grid in order to ensure the stability and safety of the power grid. problem; and the proposed monitoring method based on the online monitoring system of power quality at the grid-connected point of the wind farm connected to the grid booster station

Method used

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  • Monitoring method based on online monitoring system for power quality of wind farm connected to power grid booster station
  • Monitoring method based on online monitoring system for power quality of wind farm connected to power grid booster station
  • Monitoring method based on online monitoring system for power quality of wind farm connected to power grid booster station

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specific Embodiment approach 1

[0007] Specific implementation mode one: combine figure 1 Describe this embodiment. The online monitoring system for power quality at the grid-connected point of the wind farm connected to the grid booster station in this embodiment includes a voltage signal isolation component 1, a voltage signal conversion component 2, a current signal isolation component 3, and a current signal conversion component. 4. Multi-channel synchronous acquisition card 5, core controller 6, memory 7 and display 8; the voltage signal input terminal of the voltage signal isolation component 1 is connected with the voltage signal output terminal of the external voltage transformer; the voltage signal of the voltage signal isolation component 1 The output end is connected to the voltage signal input end of the voltage signal conversion assembly 2; the voltage signal output end of the voltage signal conversion assembly 2 is connected to the voltage signal input end of the multi-channel synchronous acquis...

specific Embodiment approach 2

[0008] Specific implementation mode two: combination figure 2 Describe this embodiment, the difference between this embodiment and specific embodiment 1 is that it also increases the data communication module 9; Other compositions and connection methods are the same as those in Embodiment 1.

specific Embodiment approach 3

[0009] Specific implementation mode three: combination image 3 Describe this embodiment, the difference between this embodiment and specific embodiment one or two is that it has also increased PQDIF file converter 10; The file data input end of described PQDIF file converter 10 and the file data output end of core controller 6 connected; the file data output end of the PQDIF file converter 10 is connected to the file data input end of the data communication module 9 . Other compositions and connection modes are the same as those in Embodiment 1 or 2. The PQDIF file converter 10 is added to convert the received data files into the PQDIF file format of the international power quality standard.

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Abstract

The invention discloses an online power quality monitoring system for grid-connected points of a booster station of a wind power plant connected into a power grid, and relates to online power quality monitoring systems of power grids. The online power quality monitoring system solves the problem that a special system for monitoring the power quality of a wind power plant connected into a power grid in an online manner is unavailable in China at present, and requirements on systems and methods for online monitoring of the power quality in real time to guarantee stability and safety of the power grid are not met. The online power quality monitoring system is characterized in that a voltage signal input end of a voltage signal isolation assembly and a current signal input end of a current signal isolation assembly are respectively connected with a voltage signal output end of an external voltage transformer and a current signal output end of an external current transformer; a signal output end of a voltage signal conversion assembly and a signal output end of a current signal conversion assembly are connected with signal input ends of a multi-channel synchronous acquisition card; an acquired signal output end of the multi-channel synchronous acquisition card is connected with an acquired signal input end of a core controller; stored data output and input ends of the core controller are connected with stored data output and input ends of a storage; and a displayed signal input end of a display is connected with a displayed signal output end of the core controller. The online power quality monitoring system is applicable to booster stations of wind power plants.

Description

technical field [0001] The invention relates to a monitoring method of an on-line monitoring system for electric power quality of a grid. Background technique [0002] With the advancement of science and technology, new energy, as an environmentally friendly and clean energy, has been paid more and more attention by people; wind power is gradually expanding its application scope due to its environmental protection and energy saving characteristics. However, because the operation mode of wind turbines is closely related to natural conditions, wind turbines have their particularity, that is, they cannot guarantee the continuity of operation, the randomness, uncontrollability and anti-peak regulation of wind farm output, which is not conducive to the power grid. Operation will have an impact on the power supply quality of the power grid, such as voltage, harmonics and flicker, frequency and stability. For wind farms connected to the power grid, in order to ensure the safe oper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 韩冰郭丹阳陈孟杨王孝余温祥龙
Owner HEILONGJIANG ELECTRIC POWER RES INST
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