Method and device for controlling an energy storage converter

An energy storage converter and control method technology, applied in the direction of AC network load balancing, AC network voltage adjustment, reducing/preventing power oscillation, etc., can solve the problems of voltage jitter, affecting the life of power grid quality equipment, etc. , Reduce current jitter and ensure smooth transition effect

Active Publication Date: 2022-03-22
XUJI GRP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the difference in the power grid environment, some voltage fluctuations will occur in the power grid, especially the micro-grid. Short-term power grid fluctuations require the energy storage converter to pass through smoothly and generate reactive power to support the power grid. However, sudden changes in voltage are often accompanied by current jitter, which affects the quality of the power grid. and equipment life

Method used

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  • Method and device for controlling an energy storage converter
  • Method and device for controlling an energy storage converter
  • Method and device for controlling an energy storage converter

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Embodiment Construction

[0061] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0062] figure 1 It is a schematic diagram of the energy storage converter control method provided by the embodiment of the present invention.

[0063] figure 1 It is a schematic diagram of a control method for an energy storage converter, including a detection module, a judgment module, a control module, and a pulse generation module. The detection module mainly monitors the AC voltage U AC And take the AC voltage U ...

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Abstract

The invention discloses an energy storage converter control method and device, wherein the method includes the following steps: detecting the AC voltage of the energy storage converter; judging whether the AC voltage has a sudden change; when the AC voltage has a sudden change, through hysteresis control and PI control adjusts the energy storage converter. When the AC voltage suddenly drops to the first preset voltage value or suddenly rises from the low-voltage area to the second preset voltage value, the hybrid control method of hysteresis control and PI control is used to overcome the power grid environment difference. The sudden change of voltage and the current shock caused by the corresponding current jitter can reduce the current jitter during high / low voltage ride-through, ensure the smooth transition of voltage and current during high / low voltage ride-through, and prolong the life of grid equipment.

Description

technical field [0001] The invention relates to the technical field of converter control, in particular to an energy storage converter control method and device. Background technique [0002] The energy storage converter can control the charging and discharging process of the battery pack, perform AC-DC conversion, and can directly supply power to AC loads in the absence of a grid. Generally speaking, the energy storage converter includes a bidirectional converter and a control unit. By receiving the background control command, the converter is controlled to charge and discharge the battery according to the sign and size of the power command, so as to realize the active power and reactive power of the grid. power regulation. [0003] Energy storage converters have been vigorously promoted because they can meet the needs of power stations for peak-shaving and valley-filling and peak-valley power price difference adjustment, smooth wind and solar output, adjust power grid pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/32H02J3/24H02J3/16H02J3/50
CPCH02J3/32H02J3/24H02J3/16H02J3/50Y02E40/30
Inventor 胡四全黄小有张锐董朝阳吉攀攀刘永成秦鸿瑜赵洋洋张振兴
Owner XUJI GRP
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