Multi-machine parallel system and control method of single-phase hybrid energy storage inverters

A hybrid energy storage and inverter technology, which is applied in the direction of single-network parallel feeding arrangement, photovoltaic power generation, AC network circuit, etc., can solve problems such as failure to achieve balance and system oscillation back and forth

Active Publication Date: 2019-01-01
江苏纳通能源技术有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0011] 6. The system oscillates back and forth, unable to achieve balance

Method used

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  • Multi-machine parallel system and control method of single-phase hybrid energy storage inverters
  • Multi-machine parallel system and control method of single-phase hybrid energy storage inverters
  • Multi-machine parallel system and control method of single-phase hybrid energy storage inverters

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Embodiment Construction

[0042] The specific implementation of this embodiment will be described below with reference to the drawings.

[0043] The multi-machine parallel system of the single-phase hybrid energy storage inverter includes N systems, including a master system and N-1 slave systems.

[0044] image 3 It is a schematic diagram of the system structure of the present invention. in image 3 In the illustrated embodiment, a master system and a slave system are included.

[0045] The main system includes a main battery board 11, a main battery 21 and a main hybrid energy storage inverter 31. The power output port of the main battery panel 11 is connected to the photovoltaic port of the main hybrid energy storage inverter 31. The power input port of the main battery 21 is connected to the battery port of the main hybrid energy storage inverter 31. The main EMS 81 is installed in the main hybrid energy storage inverter 31. The grid port of the main hybrid energy storage inverter 31 is connected to ...

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Abstract

The invention relates to a multi-machine parallel system and control method of single-phase hybrid energy storage inverters. The system comprises a main system and a plurality of slave systems, wherein the main system comprises a main battery board, a main battery and a main hybrid energy storage inverter; the main hybrid energy storage inverter is equipped with a main EMS (Energy Management System); the main EMS is in communication connection with a control electric meter; each slave system comprises a slave battery board, a slave battery and a slave hybrid energy storage inverter; each slavehybrid energy storage inverter is equipped with a slave EMS; a grid port of each slave hybrid energy storage inverter is connected with a power output port of the control electric meter; and the plurality of slave EMSs are in communication connection with the main EMS. The invention solves a problem that the system cannot be stable due to inconsistent energy adjustment when multiple energy storage inverters are in parallel operation through the change of a circuit connection structure and the cooperation of an algorithm.

Description

Technical field [0001] The invention relates to the application of a single-phase hybrid energy storage inverter, in particular to a multi-machine parallel system and a control method of the single-phase hybrid energy storage inverter. Background technique [0002] In the application of single-phase hybrid energy storage inverters, we often encounter situations that require parallel operation, but the energy storage inverters currently on the market are all self-contained single systems (EMS is inside the machine, and a single machine forms a system). This leads to the problem that the power cannot be controlled after paralleling. [0003] figure 1 It is a schematic diagram of the system structure of a single energy storage inverter in the prior art. Such as figure 1 As shown, in the prior art, a single energy storage inverter system includes a battery panel 1 and a battery 2. The power output port of the battery panel 1 is connected to the photovoltaic port of the hybrid energy s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCH02J3/383Y02E10/56
Inventor 郑洪涛张耀
Owner 江苏纳通能源技术有限公司
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