Working condition detecting system for photovoltaic assembly and power prediction method thereof

A photovoltaic module and detection system technology, applied in the direction of electrical components, circuit devices, etc.

Inactive Publication Date: 2018-06-26
ZHEJIANG ZHENGTAI NEW ENERGY DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are limitations in the existing research results, therefore, it is necessary to make further innovative designs

Method used

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  • Working condition detecting system for photovoltaic assembly and power prediction method thereof
  • Working condition detecting system for photovoltaic assembly and power prediction method thereof
  • Working condition detecting system for photovoltaic assembly and power prediction method thereof

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Embodiment

[0077] In this embodiment, a working condition detection system of a photovoltaic module, as shown in Fig. 1(a) and Fig. 1(b), the system consists of a first photovoltaic module detection module 10 including a first photovoltaic The second photovoltaic component detection module 20 of the first photovoltaic string, the third photovoltaic component detection module 30 of the first photovoltaic string, the fourth photovoltaic component detection module 40 of the first photovoltaic string, and the photovoltaic component detection module of the first photovoltaic string The photovoltaic module detection module of the 1st photovoltaic string has the same structure as the photovoltaic module detection module of the 2nd photovoltaic string, the photovoltaic module detection module of the 3rd photovoltaic string, the photovoltaic module detection module of the 4th photovoltaic string, the 1st photovoltaic string The current detection module 100, the current detection module 200 of the ...

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Abstract

The invention discloses a working condition detecting system for a photovoltaic assembly and a power prediction method thereof. The system comprises a photovoltaic assembly detecting module, a photovoltaic string current detecting module, a voltage / temperature detecting module of a combiner box, a direct-current carrier communication module of the combiner box, a signal processing communication main control module of the combiner box, and a Modbus / TCP gateway. In order to overcome a defect of tens of thousands of special transmission lines of the photovoltaic assembly, the working condition detecting system uses the direct-current carrier technology to overcome the defect of the transmission line, thereby reducing the complexity of the monitoring system of the power station; with the hand-in-hand cascaded Modbus technology, the cable length is reduced, the engineering cost is lowered, and the system reliability is improved. According to the comprehensive similarity statistic value, a similar day of a prediction day is screened out in a neighbourhood of the prediction day season of the historical day and the weather type, so that the screening efficiency and effectiveness are guaranteed and the short-term power prediction precision of the photovoltaic power station is improved.

Description

technical field [0001] The invention relates to the technical category of a photovoltaic power station. Especially for photovoltaic modules, uploading the working condition parameters of photovoltaic modules through DC carrier photovoltaic string cables, hand-in-hand cascading Modbus and TCP; according to the comprehensive similarity statistics, the similar days of the forecast date are selected from the historical days, based on Similar to daily training samples and power forecasting models, input numerical weather forecasts to implement short-term power forecasting methods for photovoltaic power plants. Background technique [0002] On January 5, 2017, the National Energy Administration issued the energy development plan (hereinafter referred to as the plan). The binding indicators formulated by the "Plan": "Increase the proportion of non-fossil energy consumption to more than 15% during the planning period", "In 2020, the installed capacity of solar power will reach more...

Claims

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Application Information

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IPC IPC(8): H02J50/00H02J50/10
CPCH02J50/00H02J50/10
Inventor 吴云来罗易李春阳金建波仇展炜吴明光
Owner ZHEJIANG ZHENGTAI NEW ENERGY DEV CO LTD
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