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Method and device for determining the cause of abnormal loss

A determination method and abnormal technology are applied in the field of determination methods and devices for abnormal loss causes, and can solve problems such as high complexity and large workload.

Active Publication Date: 2019-05-14
CHENGDU TD TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the photovoltaic power generation system, there are many links in the middle from the photovoltaic string to the high-voltage power grid. When the above-mentioned on-site positioning analysis is used to determine the cause of abnormal loss, it is necessary to check each link, which requires a large workload and high complexity. Make it difficult to quickly and accurately determine the cause of abnormal loss

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  • Method and device for determining the cause of abnormal loss
  • Method and device for determining the cause of abnormal loss
  • Method and device for determining the cause of abnormal loss

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Embodiment Construction

[0079] figure 1 It is a schematic structural diagram of a photovoltaic power generation system applicable to an embodiment of the present invention. Such as figure 1 As shown, the photovoltaic power generation system includes sequentially connected sub-array sets, step-up transformers and high-voltage power grids, wherein the sub-array sets include M sub-arrays, and the sub-arrays include at least one photovoltaic power generation device and box-type substation. The photovoltaic power generation device includes an inverter and at least one photovoltaic string, the at least one photovoltaic string is connected to the input end of the inverter, and the output end of the box-type substation of each sub-array is connected to the booster The transformer is connected, the input end of the box-type substation of each sub-array is connected with the output end of the inverter, M≥1, and is an integer.

[0080] Please refer to figure 1 , where the dotted line Indicates the cable, t...

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Abstract

The present invention provides a method and device for determining the cause of an abnormal loss. The method comprises a step of determining a fragment with an abnormal loss from a first fragment, a second fragment, a third fragment, and a fourth fragment, and a step of determining a cause of the abnormal loss according to the determined fragment with the abnormal loss. In the process, when an abnormal loss happens, the fragment with the abnormal loss is determined firstly, the fragment is analyzed, and then the reason of the abnormal loss is determined. In the process, a fragment in a photovoltaic power generation system is analyzed in a targeted way so as to determine the reason of the abnormal loss, the blindness of carrying out positioning analysis of the whole photovoltaic power generation system is avoided, and the purpose of rapidly and accurately determining the reason of the abnormal loss is realized.

Description

technical field [0001] The invention relates to photovoltaic power generation technology, in particular to a method and device for determining the cause of abnormal loss. Background technique [0002] At present, the photovoltaic power generation system of a photovoltaic power station is a grid-connected power generation system. )Wait. Photovoltaic strings, inverters, box transformers, step-up transformers, and high-voltage grids are sequentially connected through cables to transmit current. During the power generation process, the photovoltaic strings of each sub-array use the direct current generated by the light energy, and convert it into alternating current through the inverter. After the step-up transformer boosts the voltage, it can be connected to the high-voltage power grid. [0003] In the above-mentioned power generation process, there are energy conversion and DC / AC conversion, and the conversion will inevitably bring losses; moreover, the current transmission...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/38
CPCY02E10/56
Inventor 张岩曲新春张军蒋辉郑岚周仁贵
Owner CHENGDU TD TECH LTD