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Control method, apparatus and system for high-capacity energy-storage virtual synchronous machine

A technology of virtual synchronous machine and control method, which is applied in the field of electrical engineering, can solve problems such as high control complexity, and achieve the effect of simple and effective method, improved ability, and enhanced voltage intensity

Active Publication Date: 2017-06-13
XUJI GRP +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a large-capacity energy storage virtual synchronous machine control method, device and system, which are used to solve the problem of high control complexity caused by the application of virtual synchronous machines to inverters

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  • Control method, apparatus and system for high-capacity energy-storage virtual synchronous machine

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Embodiment Construction

[0034] A large-capacity energy storage virtual synchronous machine control system, including n sets of energy storage battery packs, n DC / DC circuits and one DC / AC circuit, each set of energy storage battery packs are connected to the DC through the corresponding DC / DC circuit A bus bar, the DC bus bar is connected to the DC side of the DC / AC circuit, the AC side of the DC / AC circuit is connected to the transformer in parallel, and the AC side of the DC / AC circuit is connected to the transformer in parallel.

[0035] A large-capacity energy storage virtual synchronous machine control method of the present invention, specifically, as figure 1 As shown in the figure, the multi-channel energy storage battery packs are boosted by DC / DC and connected in parallel for DC collection. The double closed-loop control system of loop and current inner loop controls the power of the energy storage battery pack, and its power command includes several parts such as inertia control, primary fr...

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Abstract

The invention discloses a control method, apparatus and system for a high-capacity energy-storage virtual synchronous machine. The control system for the high-capacity energy-storage virtual synchronous machine comprises n groups of energy-storage battery backs, n paths of DC / DC circuits, and a path of DC / AC circuit, wherein each energy-storage battery pack is connected with a direct current bus through the corresponding DC / DC circuit separately; the direct current bus is connected with the direct current side of the DC / AC circuit; and the alternating current side of the DC / AC circuit is connected with a transformer in parallel. By adoption of the process, the problem of high control complexity caused when the virtual synchronous machine is applied to an inverter can be solved.

Description

technical field [0001] The invention belongs to the field of electrical engineering, and in particular relates to a large-capacity energy storage virtual synchronous machine control method, device and system. Background technique [0002] The installed capacity of intermittent energy represented by photovoltaics and wind power accounts for an increasing proportion of the total installed capacity of the system. However, the large and frequent random fluctuations of intermittent energy output impact the active power balance of the system and affect the frequency modulation characteristics of the system. Unlike the rotating motors of conventional power plants, the intermittent energy connected to the grid through power electronic equipment is non-rotating. Static components do not have the moment of inertia of conventional units, and their large-scale connection to the grid will reduce the equivalent moment of inertia of the system, weaken the system's ability to deal with powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32
Inventor 肖飞张海龙王林黄辉曹建博陈雪黎阳赵建荣谷亚飞陈天锦曹智慧李相俊崔林张迎星周建华
Owner XUJI GRP