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A control method for an energy storage converter

A technology of energy storage converter and control method, which is applied in AC network circuits, AC network load balancing, electrical components, etc., and can solve problems such as load voltage and current spikes, affecting normal load operation, power tube duty cycle jumps, etc. , to achieve the effect of concise and clear controller

Active Publication Date: 2021-11-16
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, when the operating mode is switched, there is a switching problem between the grid-connected current controller and the off-grid voltage controller, that is, the output of the two controllers is not equal at the moment of switching, which may cause a jump in the duty cycle of the power tube and cause a load voltage. Current spikes affect the normal operation of the load

Method used

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  • A control method for an energy storage converter
  • A control method for an energy storage converter
  • A control method for an energy storage converter

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Embodiment Construction

[0023] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0024] In order to make the purpose, technical solution and advantages of the present invention more clear and definite, the content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.

[0025] Taking the single-phase energy storage converter as an example, figure 1 The circuit topology diagram of the energy storage converter adopts a single-phase full-bridge circuit topology, the output uses an LC filter, the load R is connected to both ends of the filter cap...

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Abstract

The invention discloses a control method of an energy storage converter. Both the grid-connected operation mode and the off-grid operation mode have the same control structure, and the control structure includes three control loops: a capacitor voltage loop, an inductor current loop, and a grid-connected operation mode. current loop. The switching of the operating mode only needs to change the input command signal of the capacitor voltage loop and the grid-connected current loop, without changing the controller structure, and the controller is more concise and clear. The control method can effectively solve the control algorithm switching problem during the operation mode switching process of the energy storage converter, realize the smooth switching of the off-grid mode, and avoid the impact of the load.

Description

technical field [0001] The invention relates to the technical field of electric power storage, in particular to a control method for an energy storage converter. Background technique [0002] Energy storage systems play an important role in power systems. On the power generation side, the energy storage system can replace expensive peak-shaving units to achieve peak-shaving functions, and has the advantages of fast response and high efficiency; It can also be used as a UPS to achieve uninterrupted power supply for important loads; on the distributed renewable energy generation side, the energy storage system can smooth the power fluctuations of intermittent power sources such as photovoltaics and wind power, and reduce the impact on the grid. [0003] Electric energy storage technologies include pumped storage, compressed air energy storage, supercapacitor energy storage, electrochemical energy storage, etc. Among them, electrochemical energy storage (battery) is currently...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/32H02J3/38
CPCH02J3/382H02J3/32H02J3/388
Inventor 吴昌宏舒杰王浩张继元
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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