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Medium and high voltage grid-connected power generation system, medium and high voltage grid-connected system and its control unit

A control unit, medium and high voltage technology, applied in the direction of single-network parallel feeding arrangement, etc., can solve problems such as hidden safety hazards and complicated wiring

Active Publication Date: 2018-04-10
SUNGROW POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a medium-high voltage grid-connected power generation system, a medium-high voltage grid-connected system and its control unit to solve the problems of complicated wiring and potential safety hazards in the prior art

Method used

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  • Medium and high voltage grid-connected power generation system, medium and high voltage grid-connected system and its control unit
  • Medium and high voltage grid-connected power generation system, medium and high voltage grid-connected system and its control unit
  • Medium and high voltage grid-connected power generation system, medium and high voltage grid-connected system and its control unit

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Embodiment Construction

[0041] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0042] The invention provides a control unit of a medium and high voltage grid-connected system to solve the problems of complicated wiring and potential safety hazards in the prior art.

[0043] Specifically, such as figure 1 As shown, the control unit 103 of the medium-high voltage grid-connected system is applied to the medium-high voltage grid-connected system, and the medium-high voltage grid-connected system includes: at least one inverter unit 101 and the control unit 103 of the medium-high voltage grid-connected system; :

[0044] The first end of the control unit 103 of the medium and high voltage grid-connected system passes through the communication line (such as figure 1 (shown by the middle dotted line) is connected to t...

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Abstract

The invention provides a middle-high-voltage grid-connected power generation system, a middle-high-voltage grid-connected system and a control unit thereof. The voltage acquisition of a middle-high-voltage power grid is achieved through the control unit, and after a power grid amplitude and a power grid phase synchronization signal are obtained, the information is sent to a inversion unit through a communication line. The isolation performance of the system is improved, potential safety hazards are avoided, and meanwhile the problem of complicated wire connection in the prior art is avoided.

Description

technical field [0001] The invention relates to the technical field of grid-connected power generation, in particular to a medium-high voltage grid-connected power generation system, a medium-high voltage grid-connected system and a control unit thereof. Background technique [0002] For large-scale photovoltaic power plants or distributed grid-connected power generation systems, the inverter system inverts the DC energy of the photovoltaic array and then feeds it to the medium and high voltage grid through a step-up transformer. Conventional photovoltaic grid-connected power generation system, when the light is weak at night or in rainy days, only the inverter system is in standby mode, and the step-up transformer is always connected to the medium and high voltage grid, so the step-up transformer will generate no-load loss when the system is in standby. [0003] In order to reduce the power loss of the entire power generation system, there is a medium and high voltage grid-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/38
Inventor 程林潘年安陶磊孙龙林
Owner SUNGROW POWER SUPPLY CO LTD
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