Editor's note
To this end, the industry has promoted the construction of “light storage and charging†integrated charging station, through energy storage and optimized configuration, to achieve a basic balance between local energy production and energy use load. It can not only solve the charging demand of new energy vehicles, but also improve the use of clean energy, and maximize the organic combination of environmental protection, energy utilization, and technical and economic indicators.
Although China has become the world's largest electric vehicle market, the problem of difficult charging is still a major bottleneck for the large-scale promotion and application of electric vehicles.
At this stage, most of China's electric vehicles are charged by the public grid. Not only the cost of construction and renovation of power distribution facilities is high, but also the power quality of the grid is greatly affected when the electric vehicles are disorderly charged.
To this end, the industry has promoted the construction of “light storage and charging†integrated charging station, through energy storage and optimized configuration, to achieve a basic balance between local energy production and energy use load. It can not only solve the charging demand of new energy vehicles, but also improve the use of clean energy, and maximize the organic combination of environmental protection, energy utilization, and technical and economic indicators.
Under the above background, China has strengthened its energy structure adjustment and increased the support for distributed energy. This provides an opportunity for the integrated development of distributed energy and automotive charging stations.
However, the traditional implementation of integrated development of distributed energy and vehicle charging stations also has the disadvantages of one-way transmission, large energy inverter loss and low efficiency. To this end, Shenzhen Anhewei Power Technology Co., Ltd. has launched the “light storage and charging†integrated charging facility – a common DC bus IGBT charging set, which can effectively reduce energy conversion loss, and also has the advantages of cost saving and efficiency improvement.
Analysis of integrated solutions for distributed energy and charging stations
It is understood that the traditional implementation method of the integration of distributed energy and electric vehicle charging stations is to convert photovoltaic, energy storage and other energy (direct current) into alternating current, and then to the charging facilities through the power grid and power distribution facilities. As shown below:
"In this way, energy is transmitted in one direction, and there are many links in energy conversion. In the process of transformation, the energy inversion loss is large and the efficiency is low." Huang Daqiang, deputy general manager of Anhewei, said.
So, is there a way to achieve both the two-way transmission of energy and to reduce energy loss and efficiency?
It is understood that if the distributed power and charging facilities directly use the DC-side switching energy (ie, the common DC bus), bidirectional and efficient transmission can be realized. As shown below:
Specifically, the “light storage and charging†integrated system using common DC bus and common AC bus has obvious contrasts in terms of scalability, cost, energy scheduling, grid impact, system efficiency and reliability, and these are The integrated DC bus "light storage and charging" integrated system has advantages. The specific comparison is as follows:
In fact, the Anhewei IGBT bus-flow adaptive charging set is a typical representative of the integrated DC bus "light storage" integrated charging facility, and is also the world's leading and only commercialized common DC bus IGBT charging set.
How to help the common DC bus IGBT charging set?
As a fulcrum of distributed energy systems and power distribution, the common DC bus IGBT charging set has the advantages of high body conversion efficiency (≥96%), low standby power consumption (≤0.3 ‰), and long service life (10-15 years). The specific advantages are as follows:
In general, the common DC bus IGBT charging set is not only an excellent charging facility, but also a pivot point for distributed power supply and power distribution. It is also the most suitable equipment system for integrated application of electric vehicle charging station and distributed power microgrid. .
At present, Anhewei's common DC bus IGBT charging set has established more than 10 sites in Shenzhen, Zhongshan, Guangzhou, Guilin, Liuzhou, Hebei and other cities, including Shenzhen Diankeng, Guangzhou Dajinzhong, and Jingkeng. Charging stations in several areas such as mountains have been commercialized and operational feedback is good.
In addition, according to Huang Daqiang, recently, a number of industry giants are extremely interested in Anhewei's common DC bus IGBT charging set, and are negotiating corresponding cooperation matters.
In the future, large and medium-sized cities with relatively high population density and relatively developed economy are densely populated areas of automobile transportation, but they are also the key areas for the development of distributed energy. And Anhewei's common DC bus IGBT charging set has undoubtedly promoted the construction of integrated systems for distributed energy and electric vehicle charging piles.
Small computer system interface (SCSI) is an independent processor standard for system level interfaces between computers and intelligent devices (hard disks, floppy drives, optical drives, printers, scanners, etc.). SCSI is an intelligent universal interface standard.
The maximum synchronous transmission rate of the original SCSI standard was 5MB / S (scsi-1, also known as narrowscsi, in 1986, the maximum support for seven devices, the clock frequency was 5MHz), and the later SCSI II specified two options for increasing the speed. One is to increase the frequency of data transmission, namely fast SCSI (in 1994, the maximum support for 7 devices) is 10 Mb / S (10 MHz) because the frequency is doubled; the other is to double the transmission frequency and increase the width of the data path from 8 bits to 16 bits. The maximum synchronous transmission speed of widescsi is 20MB / S (the clock frequency is 10MHz, in 1996, the maximum support for 15 devices).
The third generation of SCSI appeared around 1995, but there was no unified standard
1. Ultra SCSI with maximum synchronous transmission speed of 20MB / S (also known as FAST-20 SCSI, clock frequency of 20MHz);
2. Ultra wide SCSI with maximum synchronous transmission speed of 40MB / S (same as 1);
3. Ultra2 SCSI with maximum synchronous transmission speed of 40MB / S (also known as fast-40 SCSI, clock frequency of 40MHz, 1997).
Later, some newer SCSI standards appeared
1. Ultra2 widescsi with maxmum synchronous transmission speed of 80mb / S (clock frequency of 40MHz);
2. Ultra 3 SCSI with maximum synchronous transmission speed of 160MB / S (also known as ultra-160 or fast-80 wide SCSI, clock frequency of 40MHz plus double data rate, 1999);
3. Ultra 320 SCSI with maximum synchronous transmission speed of 320mb / S (also known as ultra 4 SCSI, clock frequency of 80MHz plus double data rate, 2002); 4. Ultra 640 SCSI with maximum synchronous transmission speed of 640MB / S (clock frequency of 160MHz plus double data rate, 2003, is the latest SCSI standard)
This interface is a convenient interface standard for system integration, cost reduction and efficiency improvement. More and more devices will use the SCSI interface standard. Therefore, there are many hard disks and SCSI CD-ROM drives with SCSI interface. However, due to the cost problem, they are mainly used on medium and high-end servers and workstations.
Metal Male SCSI Cover Section
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