Desert synchronization photovoltaic power generating system with solar azimuth tracking device and tracking method thereof

Abstract

The invention discloses a desert synchronization photovoltaic power generating system with a solar azimuth tracking device and a tracking method thereof. The system comprises a local range ZigBee wireless network, a TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) public network and a remote monitoring center. The ZigBee wireless network comprises 1-N ZigBee nodes of a photovoltaic power generating subsystem and a ZigBee coordinator of a photovoltaic power generating main system, and the ZigBee coordinator is also used as a ZigBee / TD-SCDMA gateway; working condition data of a power generating system are classified according to the operation and maintenance requirements or uploaded through a TD-SCDMA in real time or temporarily stored in the coordinator to be acquired in an off-line way by an inspector during the inspection; the remote monitoring center sets sunny, cloudy and rainy working modes of the tracking device and the rough and fine tracking accuracy in the sunny mode; astronomy tracking and tracking on generated energy of the photovoltaic power generating system are adopted in the solar azimuth tracking device; and a stepping motor and a step subdividing technology are adopted in the mechanical drive of the solar azimuth tracking device. The tracking device is merged into the photovoltaic power generating system, therefore, the reliability and the tracking accuracy of the system are improved and the operation and maintenance cost is lowered.

Description

technical field [0001] The invention relates to solar azimuth tracking of a photovoltaic power generation system, in particular to a grid-connected photovoltaic power generation system with a solar azimuth tracking device and a tracking method. Background technique [0002] With the continuous and rapid development of my country's economy, the energy supply situation is becoming increasingly tense. Whether it is increasing domestic energy supply or utilizing foreign resources, it is facing tremendous pressure. Security poses serious challenges. In August 2007, the "China Renewable Energy Medium and Long-Term Development Plan" (hereinafter referred to as the "Plan") was promulgated and implemented. The "Plan" is dedicated to the utilization of renewable energy and the development of alternatives to fossil energy. Among them, solar energy has attracted wide attention due to its three advantages of abundant reserves, no need for transportation, and no pollution. The "Planning" ...

AI Technical Summary

Problems solved by technology

Among them, solar energy has attracted wide attention due to its three advantages of abundant reserves, no need for transportation, and no pollution. The "Planning" clarifies that grid-connected power generation in deserts is the focus of photovoltaic power generation; but solar energy also has two disadvantages: one is low energy density; the other is intensity and orientation uncertainty, as well as the inherent intermittent nature of lighting

[0014] Finally, there are too many mechanical transmission pairs in the automatic tracking device of the sun position, such as the transmission scheme of the patent "Automatic Tracking System for Solar Photovoltaic Power Generation" (application number 200910038907.6), which uses a low-speed DC motor to drive the screw Chain Drive Synchronous Tracking Sunlight Automatic Tracking Device" (Application No. 200910147931.3) is a transmission mechanism composed of motors, spur gears, chains, sprockets, etc.; too many transmission pairs will have a negative impact on the reliability and tracking accuracy of the transmission mechanism

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