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Soft-start operating system and method for parallel energy storage inverters

An energy storage inverter and operating system technology, applied in the energy industry, single-network parallel feeding arrangement, climate sustainability, etc., can solve problems such as damage to the inverter switch tube, impact, and impact on service life, and achieve The effect of reducing mutual impact, improving load capacity and improving reliability

Active Publication Date: 2019-06-25
博格华纳新能源(襄阳)有限公司
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Problems solved by technology

However, according to the traditional practice, after multiple inverters are connected in parallel and then loaded, it will also cause an impact on the power supply of the parallel energy storage inverter and the load with capacitive characteristics, and may damage the switching tube in the inverter. , affecting its service life
Affecting Microgrid Reliability in Island Mode

Method used

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  • Soft-start operating system and method for parallel energy storage inverters
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  • Soft-start operating system and method for parallel energy storage inverters

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Embodiment Construction

[0044] It should be noted that, in the case of no conflict, the following technical solutions and technical features can be combined with each other.

[0045] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0046] This embodiment provides a soft-start operating system for parallel energy storage inverters, which is applied in the island mode of the microgrid. The operating system includes a master inverter unit and at least one slave inverter unit connected to the master inverter unit; Such as figure 1 As shown, where the main inverter unit includes:

[0047] The soft start module is used to send soft start start and end commands to the slave inverter unit; the frequency module is used to obtain and output the frequency phase signal of the output voltage of the master inverter unit to the slave inverter unit;

[0048] The amplitude module is used to obtain and output the reference signal of the effe...

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Abstract

The invention relates to the field of a microgrid, and particularly to a soft start operating system and method for a parallel energy storage inverter. A main inversion unit sends a soft start instruction to a secondary inversion unit according to a frequency signal, an amplitude signal and a phase signal of the output voltage of the main inversion unit; and the secondary inversion unit performs droop control according to the soft start instruction based on the received frequency signal and the amplitude signal to enable the frequency and the amplitude of the output voltage of the secondary inversion unit to be basically the same with that of the output voltage of the main inversion unit. By adoption of the technical scheme, the parallel operation soft start function can be realized in the off-network output of multiple energy storage inverters; the impact to the microgrid load can be lowered; and the parallel operation reliability and the load-bearing ability of the inverter under an island model can be improved.

Description

technical field [0001] The invention relates to the field of microgrid and energy storage operation, in particular to a soft-start operation system and method for parallel energy storage inverters. Background technique [0002] Based on distributed power generation technology, the microgrid integrating distributed power supply, energy storage unit and controllable load is an important part of the future smart grid construction. Through coordinated control between the microgrid and the large grid, it can operate in two modes: grid-connected and islanded. With the rise of micro-grid systems, energy storage power generation systems with different configurations have emerged, such as photovoltaic storage power generation systems, wind storage power generation systems, wind-solar hybrid power generation systems, and wind-solar-storage hybrid power generation systems. As an indispensable link in the micro-grid, the energy storage unit can ensure the balance and continuity of dist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/38H02J3/388Y02P80/14
Inventor 孙玉鸿龙英文彭华良
Owner 博格华纳新能源(襄阳)有限公司
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