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Solar energy is no longer an emerging technology, but a technology that is undergoing major technological changes. As we move toward grid parity (The cost of solar energy is equivalent to that of traditional power generation) and improving traditional energy generation types, because the process of converting direct current into usable alternating current in the panel becomes more efficient and affordable.

However, although the solar panel prices have decreased significantly in recent years, the next development of solar energy development will be driven by the new technology of power converter system. The rise of multistage power switch topology sophisticated will be based on silicon carbide (SiC) and gallium nitride (GaN) materials, coupled with higher operating voltages (up to 1600 VDC), the power switch more quickly, compared with the traditional system, the performance will be greatly improved. Higher switching frequency means that the passive components of the power converter, that is, the size of the induction coil and capacitor can be greatly reduced, thereby reducing the weight and reducing the cost. These two points are the key advantages of solar energy market further expansion.

As a result, these new power switching topologies are driving changes in devices that provide relevant control and support. Smaller and faster systems require improvements in the whole power conversion signal chain, faster processing, and better device integration. However, as modern solar inverters become smaller and smaller, these innovations exacerbate the challenge of addressing the important security issues inherent in power conversion. That is, the physical isolation of dangerous voltages becomes more complex as these systems shrink in size.

Although the solar panels or solar modules are the core of the solar power system, but in the whole signal chain, the more complex part is the solar power inverter – the brain of the control system. Solar inverters need to be carefully designed to protect the current measurement and calculation circuit, so that it is not affected by the power processing circuit and the transient signal caused by the switch. However, this protection is costly: multiple redundant isolation devices can increase cost and system complexity. And it is clear that the increasingly complex algorithms required to run these systems through programmable processors need to consider code integrity to ensure the security of the system itself.

In addition, official security certification is a requirement for all developers. A lot of regulations about safety disconnection (and reconnection) must be followed. How fast the system must respond, how to deal with power outages and power outages, fast disconnect and arc detection, must be resolved – in many cases, each country / region has different solutions. Since certification increases the development time (cost), the proven devices and methods are attractive, and need to be flexible enough to accommodate multiple evolving regional safety regulations.

Fortunately, these problems can be easily solved by using a power inverter platform that can be integrated with advanced mixed signal control processors, and is isolated by complementary isolation of current detection and gate driver technology.

REVO Series Wall Mounted Integrated Solar Hybrid Grid Tie Inverter With Built-in MPPT Solar Controller

1.Touch screen display.
2.Output power factor PF=1.0
3.On grid with energy storage.
4.Energy generated record, load record, history information and fault record.
5.Language and time setting.
6.Structure with dust filter.
7.AC charging and AC output time setting.
8.Charging voltage and charging current timing.
9.External wi-fi device optional.
10.Parallel operation with up to only available for.
11.Smart battery charger design.

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48V DC power supply is composed of power transformer, rectifier circuit, filter and voltage stabilizing circuit.

1.Power transformer
The alternating current supplied by the power grid is generally 220V (or 380V). However, the magnitude of the DC voltage required by various electronic devices varies. Therefore, it is often necessary to approach the grid voltage first through the power transformer, and then convert the secondary voltage to the rectifier, filter and voltage regulator. Finally, the required DC voltage amplitude is obtained.

2.Rectifier circuit
The rectifier circuit is used to rectify the alternating sine and negative alternating voltage into a single direction pulsating voltage by using a rectifying element with unidirectional conductive property. However, this one-way pulsating voltage often contains a large pulsating component, which is far from ideal DC voltage.

3.Filter
The filter consists of capacitor, inductance and other energy storage components. Its function is to filter the pulsating component in the one-way pulsating voltage as much as possible, so that the output voltage becomes a relatively smooth DC voltage. However, when the grid voltage or load current changes, the amplitude of the filter DC voltage will also change, while in the relatively high demand of electronic equipment, this situation is not met the requirements.

4.Voltage stabilizing circuit
The function of the voltage stabilizing circuit is to take some measures to keep the output DC voltage stable when the grid voltage or load current changes.

SOROTEC SP6U-48200 48V Switching Power Supply Embedded System

1.Constructed with standard 19 inch screen, which has the advantage of wide use.
2.The data center area and the installation cost can be saved due to its small size and the embedded installation.
3.Wide input voltage range (85-290Vac), the power grid is adaptable.
4.Perfect lightning protection.
5.Rectifiers are hot-pluggable. Easy and quick on line maintenance.
6.The rectifier uses DSP (Digital Signaling Processor) ology, makes the power density ran up to 14W/In3.
7.Battery management, prolongs the life of the battery well.
8.Have passed CE, UL, TLC, and other related certifications.
9.Excellent energy conservation and environmental protection.

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Photovoltaic technology can provide clean, safe and reliable renewable energy, low operating cost, minimum maintenance requirements, zero fuel cost and long service life (more than 20 years). These advantages makes the off grid photovoltaic applications technically feasible and economically competitive. Solar power generation has been proved to be able to meet the social needs of future energy sources, and is a non polluting power generation mode. 450000 off grid solar systems (typical 35-100Wp capacity) have been installed in India; In developing countries, such as Nepal (61%) the majority of the population without electricity, the government has to give priority to rural areas, suburban electrification, and solar power generation network technology is one of the most widely used power generation technology.

One of the typical examples of off grid PV applications is the 1kW PV array of the VanGeet off grid photovoltaic base in Colorado, USA.
In this case, extending 1.5 miles to the building of power network at an estimated cost of $100000, of which, including amorphous silicon PV array with MPPT solar charge controller, 42.7kWh inverter battery combination 4kW, those with high efficiency building design combined, proved in economy and environmental protection are very successful.

Photovoltaic application in 2010 global shipping has been more than 16GWp, the market accounted for 87% of crystalline silicon material. Although the efficiency of world class polycrystalline silicon batteries has been reported to be as high as 20.3%, the efficiency of the typical commodity silicon module is only 13.4%, but it is still selected as the basis for this research. Because of the PV array power requirements provided by solar photons, the photovoltaic array does not power at night, electric power in cloudy or overcast local climate below the peak, the PV array with discontinuity. In order to ensure the continuity of off grid PV applications, these factors require battery energy storage.

The DC output from the PV array is firstly converted into AC (DC-AC) through the inverter, and the published inverter efficiency range is 85.8%-92.4% (maximum efficiency). However, when the polysilicon PV array is used, the total system efficiency of the inverter is about 10%. Under such a low conversion efficiency, the loss associated with the inverter should be minimized.

SOROTEC Solar MPPT Charge Controller 60A 3200W 12V 24V 48V

1. Intelligent maximum power point tracking technology increases efficiency 25%~30%
2. Compatible for PV systems in 12v, 24v or 48v
3. Three-stage charging optimizes battery performance
4. Maximum charging current up to 60a
5. Maximum efficiency up to 98%
6. Battery temperature sensor (BTS) automatically provides temperature compensation
7. Support wide range of lead-acid batteries including wet, AGM, and gel batteries
8. Multi-function LCD displays detailed information

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In the Internet industry, the blackout affects the entire chain, while consumers in the end, they behoove blaming enterprises, while enterprises are suffering: company website system hosted in the IDC room, they are also victims. Although the power cutoff accident is due to equipment problems of power companies, but the ultimate responsibility for the outage will be on to the data center UPS power supply system.

In the power cutoff accident, to ensure the continuity of power supply, is the most basic and most important function of the UPS system, but it also has a steady voltage and frequency, filtering, anti electromagnetic interference, anti surge voltage and RF and other functions, to ensure IDC load get high quality power supply continued. In the rapid growth of Internet applications today, the importance of the data center further enhanced. The data center is no longer carrying the data itself, but the company’s core business, its reliability is the key to ensure the efficient operation of the enterprise’s core business. Data center system need to maintain stable operation, power supply is the foundation, to ensure the reliability of UPS power supply and therefore become the focus of the problem.

Unlike other devices, as the key to ensure the quality and continuity of the power supply system, UPS requirements on the reliability is not limited, the unlimited upgrade of the performance of UPS itself has been unable to meet the needs of the application, the equipment redundancy backup configuration design appeared. In other words, in order to make the network as much as possible to obtain “100% high availability”, it is necessary to eliminate the single point “bottleneck” hidden trouble in the whole set of UPS redundant parallel power supply system. Hence the need in the whole set of UPS power supply system, from the low voltage side / high voltage input transformer input power supply redundancy backup generator composed of the input end, until to the end user equipment of the entire UPS system configuration, must adopt redundancy design and configuration necessary, in order to obtain enough “error” function. Based on the above reasons, some equipment manufacturers provide the power supply scheme of double bus to customers in critical applications, the reliability of redundant “vendors to provide a dual bus output type power supply system can make the key load reached 99.99999%.

In fact, the reliability of the IDC, the power supply itself cannot be considered in isolation, the power supply and environment of the server room, including the management and monitoring of the infrastructure, are increasingly becoming a inseparable whole, as the foundation of all the technical and business applications, the system needs to be relatively independent and unified planning and construction. If there is no principle, power equipment or other infrastructure systems are with the core business growth stage investment, decentralized procurement, resulting in infrastructure of brand and equipment vary widely, cause compatibility problems and maintenance difficulties, it will lower the reliability of the whole room, eventually bring security risks.

It can be seen that building a highly reliable power supply system based on UPS is not as simple as buying a few devices. It needs to examine the performance of the equipment and configure the power supply system on demand. For equipment providers will need to have a deep understanding of data center applications and customer needs, need to have all aspects of technology and expertise of power supply and even the entire infrastructure system, which can provide the power supply, refrigeration, infrastructure management and other aspects of the full range of products, reasonable design of the overall solution for customers, while providing efficient technical support and maintenance. Only in this way, it can more effectively ensure the reliability and availability of the server room, make the network always online.

SOROTEC MPS9335 10-1200KVA Without Switch Cabinet Modular Uninterruptible Power Supply

1. Superior energy saving: Efficiency > 96% at 50%-75% rated load, and > 95% at 25% rated load; Input PF > 0.99,input THDi<3%
2. Easy-to-install: Top or bottom cabling, no need of input cabling cabinet.
3. Easy-to-maintain: Full front access, UPS, failed part can be replaced shortly.
4. Easy-to-modify: The number of batter y cells can be configured flexibly, so the original batteries can be used when modifying the legacy system; moreover, the battery cell can be replaced in time when it fails without interrupting the normal operation of modular uninterruptible power supply.
5. Extra large LCD that can display 13 language (Chinese ,English ,Russian, French ,Spanish and so on).
6. Provide large LCD touch screen (optional).
7. Each modular uninterruptible power supply modules provide 4.5KW charge capacity. equivalent to 10 to 12A.
8. Advanced DSP full digital control technologies realize higher system stability, online capacity expansion and maintenance.
9. Advanced distributed active parallel technology realizes parallel operation of 4 UPS units and online capacity expansion without centralized bypass cabinet.
10. Adaptive to severe power grid environment due to extra wide input voltage and frequency ranges.
11. Intelligent batter y management maintains batter y automatically to prolong the batter y life.
12. The machine system for modular structure, consists of 1 to 10 module’s biggest single module to 30 kw.
13. Modular uninterruptible power supply power module supporting hot swappable, capacity upgrade extremely simple.
14. Super ability for overload and short circuit, ensure the system stability and safety under the limit state of system.

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Logistics support time refers to the time that from personnel (maintenance engineers) once informed to arrival the site and start maintenance.

Person: the fastest maintenance engineers are the users themselves, then followed by manufacturers, local maintenance engineers, and factory engineers with quick response capability (affected by the service responsiveness of the manufacturer and the means of transportation).

Object: the user site is ready to have enough spare parts can be replaced, if the manufacturers and local field offices dont have the spare parts, then need manufacturer to deliver spare parts to site. For modular UPS, a system is composed of modules of different capacities, it’s OK to prepare only one module. While for the traditional centralized UPS, the possible fault components can not be located and predicted. In order to improve the probability of repair, more spare parts are often needed.

Example: a foreign brand, the traditional centralized UPS failure, at the end of the year. Due to the cold weather, the power grid load is large, the frequent blackouts in power grids are unpredictable, and once the power failure, then all the chips on the assembly line will be scrapped, users are very anxious. At that time, the UPS manufacturers only have Thailand Bangkok office in Asia, and need to send senior engineers to carry a large number of spare parts to site maintenance. While visa takes time, and other costs are not cheap. Users can not stand the long wait, resulting in great losses and expensive maintenance quote, but later inspection results are very unexpected: The actual fault location is quite different from the spare parts that the engineer prepared to transport by air. If it’s modular UPS, it doesn’t take a long time for user to backup a module or even ship a module.

SOROTEC MPS9335C 10-300KVA Modular Type UPS

Model: 10-1200KVA
Nominal voltage: 380/400/415VAC
Output power factor: 1

MPS9335C series Modular type UPS is modular online UPS for sensitive equipments. The single cabinet power rating covers from 10KVA to 300KVA which delivers the best of combination of reliability, hot-swappable and flexibility. With the latest IGBT three-level technology and DPS control, MPS9335C achieves a high input power factor, low THDi Modular design with N+X redundancy and online hot swapping, easy to expand the capacity Full DSP control of high stability, reliability and safety Integrated IGBT module with improved performance and reduced size.

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