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A new energy station power quality control method, device and system

A power quality and control system technology, applied in harmonic reduction devices, AC network voltage adjustment, AC network load balancing, etc., can solve the problems of safe and stable operation of the power grid, power quality deterioration

Active Publication Date: 2021-06-04
XUJI GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The development and utilization of new energy in the power grid has led to deteriorating power quality, which has caused great harm to the safe and stable operation of the power grid.

Method used

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  • A new energy station power quality control method, device and system
  • A new energy station power quality control method, device and system
  • A new energy station power quality control method, device and system

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Embodiment Construction

[0042] The technical scheme of the present invention will be described in further detail below in conjunction with accompanying drawing

[0043] An embodiment of the new energy station power quality control method of the present invention.

[0044] Such as figure 1 As shown, the new energy station power quality control method in this embodiment includes:

[0045] 1) Analyze and evaluate the power quality of the voltage, current and frequency data from the monitoring point to determine whether the network access requirements are met. If the network access requirements are not met, further analyze the power quality problems; the power quality problems include those caused by new energy power generation fluctuations Voltage fluctuation, voltage deviation, three-phase unbalance, current harmonic, voltage harmonic and frequency deviation;

[0046] 2) When the power quality problem is the voltage fluctuation caused by the power fluctuation of new energy power generation, only the ...

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Abstract

The invention relates to a new energy station power quality control method, device and system. The method includes: analyzing and evaluating the power quality data from monitoring points to determine whether the network access requirements are met. If the network access requirements are not met, further analysis Power quality problems; when the power quality problem is the voltage fluctuation caused by the power fluctuation of new energy generation, only the DC energy storage unit is used to regulate; when the power quality problem is voltage deviation, three-phase unbalance, current harmonics, voltage harmonics and When at least one of the frequency deviations occurs, only the power quality regulator is used to control the power quality problem; when both of the above two power quality problems occur, the DC energy storage unit and the power quality regulator are used to jointly regulate. The device includes a collection module, a memory and a processor for realizing the above method. The system includes a direct current energy storage unit, a power quality regulator and the aforementioned power quality control device. The invention can effectively improve the power quality of new energy stations.

Description

technical field [0001] The invention belongs to the technical field of new energy power generation, and in particular relates to a new energy station power quality control method, device and system. Background technique [0002] With the rapid development of new energy in the world today, the installed capacity of new energy power generation is increasing year by year, and more and more new energy power generation systems are put into the power grid. The development and utilization of new energy in the power grid has led to the deterioration of power quality, which has caused great harm to the safe and stable operation of the power grid. In particular, the connection of new energy stations based on photovoltaic and wind power to the power grid brings more power quality problems to the power system, which has become a research hotspot in the world. [0003] Photovoltaic and wind power generation are connected to the power grid through inverters, which leads to a large number...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/32H02J3/01H02J3/12H02J3/26
CPCH02J3/01H02J3/12H02J3/26H02J3/32Y02E40/40Y02E40/50
Inventor 苑军军郭宝甫王卫星袁方方谢青松王法宁陈玉玺
Owner XUJI GRP