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Time synchronization control system of off-grid photovoltaic power system

A photovoltaic power generation system, time synchronization technology, applied in the monitoring of photovoltaic systems, photovoltaic power generation, synchronization signal speed/phase control, etc., can solve problems such as high project cost, reduced synchronization control accuracy, and influence on satellite timing signal reception Achieve the effect of synchronous flow detection and synchronous control synchronous detection

Active Publication Date: 2011-01-19
YINGLI ENERGY CHINA
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Problems solved by technology

[0004] However, the inventor found in the research process that the existing GPS method requires a set of GPS control circuits to be installed on each device, which makes the project cost relatively high
At the same time, when there is occlusion above the device, it will affect the reception of satellite timing signals, resulting in a decrease in the accuracy of synchronization control

Method used

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  • Time synchronization control system of off-grid photovoltaic power system

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Embodiment Construction

[0042] In order to make the above objectives, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] In view of this, the purpose of the present invention is to provide a time synchronization control system for an off-grid photovoltaic power generation system, which can realize precise control of the time synchronization of the off-grid photovoltaic power generation system and reduce the engineering cost.

[0044] The embodiment of the present invention uses the time signal sent by the national time service center to perform synchronization control of off-grid photovoltaic power generation system equipment, that is, to use time synchronization to perform synchronization control of multi-point solar photovoltaic products. The National Time Service Center is responsible for determining and maintaining my country's ato...

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Abstract

The invention discloses a time synchronization control system of an off-grid photovoltaic power system, which comprises a time receiving circuit, a clock correction computation control circuit and an off-grid system drive control circuit, wherein the time receiving circuit has a receiving antenna, receives a radio standard time signal transmitted by a radio time launcher and sends the received signal to the clock correction computation control circuit; the clock correction computation control circuit is used for filtering and analyzing the standard time signal, comparing the standard time signal with an actual clock signal of the photovoltaic power system, correcting the actual clock signal and sending the corrected clock signal to the off-grid system drive control circuit; and the off-grid system drive control circuit is connected with at least two off-grid photovoltaic power systems and drives all the off-grid photovoltaic power systems according to the received corrected clock signal, so that all the off-grid photovoltaic power systems are kept synchronous. When the embodiment of the invention is used, the precise control over the time synchronization of the off-grid photovoltaic power systems is realized, and the construction cost of a project can be reduced.

Description

Technical field [0001] The present invention relates to the technical field of synchronization control, in particular to a time synchronization control system of an off-grid photovoltaic power generation system. Background technique [0002] In areas where there is no power grid, solar cell components can be used to generate direct current, which is charged into the storage battery for electrical appliances through the solar charge controller, which is called an off-grid photovoltaic power generation system. There are two common off-grid photovoltaic power generation systems: one is DC off-grid photovoltaic power generation system, the DC power of its battery can be directly supplied to DC appliances, etc.; the second is AC off-grid photovoltaic power generation system, whose battery is connected to off-grid inverter It converts the DC power of the battery into the electric energy parameters used by AC electrical appliances for use by the electrical appliances. Nowadays, off-gri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N6/00H04L7/04H02S40/30H02S50/00
CPCY02E10/50
Inventor 王士元
Owner YINGLI ENERGY CHINA
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