Off-grid type group sharing solar power generating and supplying system structure and method

A technology of power supply system and solar energy, applied in the direction of generator/motor, photovoltaic power generation, battery circuit device, etc., can solve the problems of large waste, surge of battery discharge, increase of system configuration, etc., and achieve the effect of reducing investment scale and avoiding over-discharge

Active Publication Date: 2012-11-14
北京天启鸿源新能源科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the defects of the existing technology, the current off-grid independent solar power supply system increases the investment of the system, resulting in large capacity balance, large waste, and increased use costs, which seriously hinders the off-grid independent solar power supply system. Application and Development
[0004] In the prior art, when constructing an off-grid independent solar power supply system, the average power consumption and the maximum nominal power consumption are often considered in combination with the characteristics of power consumption. The maximum nominal power consumption of commonly used household appliances is its More than twice the average power consumption, the peak power consumption of electrical loads including motors will be greater, which is more than 3-7 times the normal working power consumption, and the use time of the maximum power consumption is extremely short, which is the number of normal power consumption time. One ten-thousandth, it can be known from the discharge characteristics of the battery The large current is a surge in the discharge capacity, and the power capacity must be increased several times for one ten-thousandth, and the investment and waste can be imagined
[0005] According to the discharge characteristics of the battery, it can be known that C available 1 =0.55C 10 (A.h), I 1 =5.5I 10 (A), that is to say, the instantaneous large current demand of the load will cause a surge in battery discharge
It can be seen that the system configuration of a single off-grid independent solar power supply system will greatly increase
[0006] At present, the cost per watt of an ordinary lead-acid battery is about 0.6 yuan (0.5-0.8 yuan), and the available electricity is 50% considering the safe discharge factor. The cost ratio in the system is about 1:1. (Of course, the system also needs electronic control part, charging circuit, inverter circuit and system control, etc.). The nominal capacity of the storage battery should be more than 6 times the peak power Wp capacity of the solar power generation components. If the peak power generated at the moment of starting the motor load is considered, its safe and normal ratio should be more than 10-12 times or even higher, and the system The electricity generated by the solar power generation components in a day is all used for charging and storage, which can only meet the storage capacity of a quarter of the storage battery. That is to say, for the civilian solar power supply system that is used every day, three quarters of the storage battery is Unreasonable configuration is one of the important reasons why off-grid independent solar power generation and power supply systems are difficult to popularize, and the irrationality of the system's ratio and control method can easily cause undercharging and overdischarging of the battery, greatly shortening the life of the battery Most of the battery life of this kind of independent solar power supply system on the market is only 1-2 years, and after half a year, it will work with illness, and the efficiency will be greatly reduced.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Off-grid type group sharing solar power generating and supplying system structure and method
  • Off-grid type group sharing solar power generating and supplying system structure and method
  • Off-grid type group sharing solar power generating and supplying system structure and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] As an implementation example, the off-grid group sharing solar power generation and power supply system and method of the present invention will be described with reference to the accompanying drawings, however, the technology and solutions of the present invention are not limited to the content given in this implementation example.

[0031] figure 1 A schematic diagram of the functional principle of the off-grid group shared solar power supply system is given, as shown in figure 1 As shown, the structure and method of the off-grid group shared solar power supply system, each independent solar power supply system consists of solar power generation components P, solar power input ports (1), MPPT and DC / DC1 circuits (2), charging circuit (3), storage battery deployment circuit A (4), storage battery distribution circuit B (5), multiple battery packs (6), power distribution control circuit (7), system controller (8), DC / DC2 circuit (9 ), DC / AC inverter circuit (10), monit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of solar power generating and supplying, in particular to an off-grid type group sharing solar power generating and supplying system structure and a method. A system is provided with a time delay regulator (an agreed signal is adopted for a request, and an anti-collision processing is performed) for delay control in the extreme condition that an instantaneous peak occurs when power is used by a plurality of systems at the same time, so that overdischarge is prevented, and a storage battery is effectively protected from damage. In the condition that one group of the off-grid type group sharing solar power supplying system meets the requirement of the same load power consumption used for connecting the system, the system proportion is designed to the condition that the nominal capacity of the storage battery is 1.5 to 2.5 times the peak power Wp capacity of a solar power generating component, and the nominal capacity more than 10 times the peak power Wp capacity is not needed any longer, so that the investment scale and the solar power generating and supplying cost are reduced. Because the power can be mutually distributed by a plurality of off-grid type group sharing solar power supplying systems, and the solar power generating components and the storage batteries supply the power to loads at the same time, the amount of the solar power generating components of each off-grid type group sharing solar power supplying system can be reduced by more than 30% when the requirement of the same load power consumption used for connecting the systems is met.

Description

technical field [0001] The invention belongs to the technical field of solar power generation and power supply, and in particular relates to a structure and method of an off-grid group sharing solar power generation and power supply system. technical background [0002] Renewable clean energy technology is one of the most decisive technical fields in the development of the world economy in the 21st century. It has the advantages of ubiquity, inexhaustibility, and no environmental pollution. It plays an increasingly important role in the sustainable development of energy in the world and in my country. role. As an inexhaustible source of energy that is ecologically pure and does not change the fuel balance on the earth, solar energy has the advantages of large total energy and easy miniaturization. Therefore, its development and utilization have become more and more popular in recent decades. are getting more and more attention. Solar energy utilization is one of the fastest...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H02N6/00H02J7/00H02S10/20
CPCY02E10/50Y02E70/30
Inventor 周锡卫
Owner 北京天启鸿源新能源科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products