On Oct 15th 2019, as one of the most important trade promotion platforms for Chinese enterprises to expand the global market, Canton Fair in Guangzhou focused on highlighting innovation driven, and “independent brand” became a high-frequency word of Canton Fair.
Xu Bing, a spokesman for the Canton Fair and deputy director of the China Foreign Trade Center, said that the domestic and foreign environment faced by China’s foreign trade development this year is more complex and uncertain. The majority of exhibitors accelerated quality improvement and innovation, and continued to make efforts in technology research and development, product innovation, brand cultivation, etc., with high technology, high quality, high added value and independent brand products emerging.
Many independent innovative R & D products are welcomed by the market. At the same time, purchasers are less sensitive to price and pay more attention to the technology, brand, quality and service of products.
In this exhibition, Sorotec‘s products have attracted many customers and been widely praised. Especially Revo II. Revo II is a hybrid pure sine wave solar inverter. Its particular touch screen makes it more convenient to operate. It can parallel up to 9 pcs. The maximum power is 49.5KW. It has four working modes. Especially in the “Solar+AC” working mode, the solar and AC mains can charge the battery and power the loads together. It is the maximum use of the solar energy. The solar energy utilization is over 15% than other solar inverter. Revo series can start and work without battery, and also can work with lithium battery. This product has a strong comprehensive competitiveness.
Sorotec not only has the most advanced scientific research technology in the field. The products are of high gold content. And Sorotec is willing to accept and create new things. This has been unanimously recognized by all customers.
Due to the high integration, compact overall structure and large heat dissipation, the hybrid inverter requires high temperature, humidity and dust content in the installation environment. When installing the solar inverter, it must provide a good operating environment for the inverter. The working ambient temperature of the inverter is rated at 40 ℃. If the ambient temperature is higher than 40 ℃ ~ 50 ℃, the rated current must be reduced. Otherwise, the temperature rise of the device will be too high, which will increase the possibility of device damage (especially IGBT power module), and have a great impact on normal and safe operation. If the working environment of the inverter fails to meet the requirements of the inverter on the working environment, it will cause high failure rate of the inverter, affect the long-term, reliable and safe operation, resulting in unnecessary economic losses. Therefore, the following matters should be paid attention to in the application of the inverter.
The inside of the inverter is a high-power electronic component, which is easily affected by the working temperature. The product is generally required to be 0-55 ℃, but in order to ensure the safety and reliability of the work, it should be considered to leave room for use, preferably controlled below 40 ℃. If the inverter is installed in the inverter cabinet, it shall be installed on the upper part of the cabinet and strictly comply with the installation requirements in the product manual. It is absolutely not allowed to install the heating element or the element easy to heat against the bottom of the inverter.
When the temperature is too high and the temperature changes greatly, condensation is easy to occur inside the inverter, and its insulation performance will be greatly reduced, or even lead to short circuit accidents. If necessary, desiccant and heater must be added to the inverter cabinet. The surrounding humidity of the inverter shall be below 90%. If the surrounding humidity is too high, the electrical insulation will be reduced and the metal part will be corroded. If restricted by the installation site, the inverter shall not be installed in a place with high humidity, and the cabinet of the inverter shall be sealed as far as possible. In order to prevent condensation when the inverter stops, a convection heater should be added.
If the concentration of corrosive gas is large, it will not only corrode the leads and printed circuit boards of components, but also accelerate the aging of plastic components and reduce the insulation performance. In this case, the inverter cabinet should be made into a closed structure and air exchange. There shall be no corrosive, explosive or combustible gas, dust and oil mist around the inverter. If there are explosive and combustible gases in the surrounding environment where the inverter is installed, there are relays and contactors that are easy to generate sparks in the inverter, so fire or explosion accidents may be caused sometimes. If there is dust and oil mist around the inverter, its adhesion and accumulation in the inverter will lead to the decrease of insulation; for the inverter with forced air cooling, the temperature in the inverter will rise abnormally due to the filter blockage, so that the inverter cannot operate stably.
4.Vibration and shock.
When the inverter cabinet is subject to mechanical vibration and impact, it will cause poor electrical contact. At this time, in addition to improving the mechanical strength of the inverter cabinet, away from the vibration source and impact source, the anti-seismic rubber pad shall be used to fix the inverter cabinet and electromagnetic switch and other components that generate vibration. The vibration resistance of the inverter should be different in different types. When the vibration exceeds the allowable value of the inverter, the fastening part of the components will be loose and the relay and contactor will act wrongly, which often leads to the unstable operation of the inverter. For the vibration situation that can be foreseen in advance, the vibration of inverter should be fully considered.
5.The altitude of inverter application is usually below 1000m.
If the altitude is high, the air pressure will be high, which is easy to cause insulation damage. In addition, the cooling effect of high elevation also decreases, so it is necessary to pay attention to the temperature rise of inverter.
1.Touch screen display 2.PV and utility power take the load at same time(can setting) 3.Output power factor PF=1.0 4.On&Off Grid with energy storage 5.Energy generated record,load record,history information and fault record 6.Language and time setting 7.Structure with dust filter 8.AC charging and AC output time setting 9.Charging voltage and charging current timing 10.External Wi-Fi device optional 11.Parallel operation with up to 6 units only available for 3kW/4kW/5kW 12.Connected with battery optional 13.Wide PV input range 120-450VDC 14.Independent CPU 15.MAX PV Array power 4500W 16.Solar and Utility supply power to the load when solar power is not sufficient to load
The 7th Military World Games opened in Wuhan, Hubei Province on the evening of October 18, 2019. The Games will last 10 days from October 18 to 27, 2019.
The 7th Military World Games is the first comprehensive international military sports event hosted by China, with the largest scale in the past and the largest international sports event held by China after the Beijing Olympic Games. 9308 military athletes from 109 countries will compete and enhance friendship in Wuhan. As the host country, China has set up a sports delegation of 553 athletes, the largest in the history of our country.
It’s a great honor for soled to participate in the power security system of the games. SOROTEC GP9335C series online UPS provides power support for Wuhuan sports center.
During the military games, SOROTEC sent many engineers to the venue all day, recording the ups operation status in detail, ensuring that the power supply system is uninterrupted for 24 hours, providing stable, safe and reliable power support for the venue.
SOROTEC GP9335C series online UPS adopt advanced intelligent design concept, and are successfully applied in military system, electric power industry, PetroChina system, medical field, banking system, chemical industry, rail transit, political and mining fields, large-scale events, etc., all of which are well received by users.
■Use advanced 6th generation DSP and full digital control technologies to realize higher system stability. ■Output power factor is 0.9, carrying capacity than conventional UPS with 10% above, as users reduce investment cost. ■Advanced distributed active parallel technology can realize parallel operation of 6PCS UPS units without the need of centralized bypass cabinet. ■6-inch extra large LCD that can display 12 language ( Chinese ,English,Russian,Spanish,French and so on). ■Extra wide input voltage and frequency range make it adapt to severe power grid environment. ■Intelligent battery management maintains battery automatically to prolong the battery life. ■Standard input/output filter improves the system EMC performance. ■Extra strong capability to withstand output overload and short circuit, ensuring the system stability and system safety under extreme conditions. ■Layered independently-sealed ventilation channel and re-dundant fan, circuit boards with protective paints and a dust filter embedded make it highly efficient to dissipate heat and protect the product effectively under severeenvironment.
Manufacturers and users of UPS power supply system have long noticed the matching problem between generators and UPS, especially the harmful effects of current harmonics generated by rectifiers on power supply systems such as voltage regulators of generators and synchronous circuits of UPS. Therefore, the technicians designed the input filter and applied it to UPS, and successfully controlled the current harmonics in UPS application. These filters play a key role in UPS compatibility with generators.
In fact, all input filters use capacitors and inductors to absorb the destructive current harmonics at the UPS input. The design of the input filter takes into account the percentage of all possible harmonic distortion inherent in the UPS circuit and at full load. Another benefit of most filters is to increase the input power factor of UPS with load. However, another consequence of the application of input filters is to reduce the overall efficiency of UPS. Most filters consume about 1% UPS power. The design of input filters has been seeking a balance between advantages and disadvantages.
In order to improve the efficiency of UPS system as much as possible, UPS engineers have recently improved the power consumption of input filters. The improvement of filter efficiency depends largely on the application of IGBT (Insulated Gate Transistor) technology to UPS design. The high efficiency of IGBT inverters leads to the redesign of UPS. The input filter can absorb some current harmonics and a small part of active power. In short, the ratio of inductance factor to capacitance factor in the filter is reduced, and the volume of UPS is reduced and the efficiency is improved. The compatibility between UPS and generators is another problem.
1.Superior energy saving and environment-friendly: Efficiency > 96% at 50%-75% rated load, and > 95% at 25% rated load; Input PF > 0.99,input THDi<3%. 2. Superior capability of powering load: Output PF is 0.9 or 1, no need of power deration with load of leading or lagging PF. 3. Easy-to-install: Top or bottom cabling, no need of input cabling cabinet. 4. Easy-to-maintain: Full front access, UPS, failed part can be replaced shortly. 5. Easy-to-modify: The number of battery 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 UPS. 6.6-inch extra large LCD that can display 12 language (Chinese ,English ,Russian, French ,Spanlish and so on). 7.Provide large LCD touch screen (optional). 8.Each UPS modules provide 4.5KW charge capacity. equivalent to 10 to 12A. 9.On-Line Double Conversion, fully isolating the influences of power grid pollution and power failure from utility power supply and diesel generator to load. 10. Advanced DSP full digital control technologies realize higher system stability, online capacity expansion and maintenance. 11.Advanced distributed active parallel technology realizes parallel operation of 4 UPS units and online capacity expansion without centralized bypass cabinet. 12.Digital load sharing technology features extra low cross current and extreme high system reliability in parallel operation. 13.Adaptive to severe power grid environment due to extra wide input voltage and frequency ranges. 14.Extra strong capability to withstand output overload and short circuit, ensuring the system stability and system safety at limit conditions. 15 Intelligent battery management maintains battery automatically to prolong the battery life. 16. Efficient heat dissipation and effective protection under severe environment due to its independent layer-sealed ventilation channel and redundant fan design, as well as the paint-protected circuit boards and built-in dust filter. 17.Applicable voltage south America.
With the development of economy and society, the power quality of the power industry and the reliability and safety requirements of power supply are getting higher and higher. How to compensate the power quality of the power grid (including harmonics, reactive power and unbalance) has become the focus of power grid research. In addition to continuous innovation in management, it is more urgent to adopt and promote some good technical measures to more effectively improve the reliability and safety of power supply. SOROTEC is dedicated to solving the problem of power quality for users. The series of APF / SVG / SPC adopts modular design, which can run in parallel at the same time. The loss of the whole machine is less than 3%. It is fully suitable for various situations in industrial and civil fields, and is the best solution for power quality management.
The following is a brief introduction to the advantages of this series of products.
1.Higher compensation accuracy and stability
1)With using he quasi-4-core 28377CPU, the computing power is more than 5 times higher than 28335CPU. The 16-bit A/D sampling is adopted to support the calculation and compensation of higher harmonics. The control bandwidth is more higher than before. The switching frequency ups to 20kHz with higher control accuracy and stability. 2)When double precision sampling technology is adopted, the control frequency ups to 40kHz. It not only improves the calculation accuracy but also further improves the phase margin of the control system, thus ensuring the compensation accuracy and stability of the system. 3)The voltage sharing control technology of positive and negative dc bus is adopted to ensure the control precision of output current.。
1)Providing more comprehensive protection scheme: not only support the traditional short circuit protection, but also support over-voltage protection, over-current protection, under-voltage protection of the driving power supply, truly achieve the IGBT fault prevention and protection, so as to ensure the safe operation of the device;(The protection threshold of conventional IGBT short-circuit protection is 3 to 5 times of the IGBT peak current, which is mainly used to prevent secondary accidents caused by the damage of IGBT. But it cannot prevent the damage of IGBT caused by the over current. The protection threshold of our company’s over current protection is 0.8 times of the IGBT peak current, which can effectively protect the safe use of IGBT.) 2)The carrier synchronization technology is adopted to ensure that the switching frequency of the parallel module is completely consistent, which can effectively avoid high-frequency circulation；
1)The dynamic peak current limiting algorithm is adopted to ensure the maximum power output of the device’s compensation capacity and prevent overcurrent protection in the case of any wave peak ratio. So the operation reliability is higher.； 2)The real-time monitoring of electrolytic capacitor life of dc bus is supported. The working mode is adjusted according to the monitoring results to ensure the stable operation of the device and extend the service life of the electrolytic capacitor.。
4. More convenient management mode
It not only supports the random independent management and configuration mode of WIFI wireless communication, but also supports the remote unified management and configuration mode of GPRS wireless or wired communication
5.Lower power consumption
Thanks to the profound understanding of power electronics high-speed switching devices, the active power loss of 100kVA device is less than 2.5% when the device is fully loaded.
6.Other deep optimization
1)The filter capacitor with the voltage grade of 320V is adopted to ensure that the capacitor is not damaged under the responsible working condition with higher safety. 2)The relay delay shut-off design is adopted. When the device is out of operation, the relay does not shut off IGBT at the same time, so as to extend the life of the relay； 3)When the multi-module cabinet is running, if one module is out of fault, other modules can adaptively compensate the vacancy capacity . So the compensation is more stable and reliable.； 4)In the case of inductive load, the device adopts the operation mode of control power factor. In the case of capacitive load, the device can fully compensate capacitive reactive power under the premise of adequate compensation capacity. The power factor can be increased to 1 at maximum.； 5)The device supports the reactive loss of synchronous compensation transformer； 6)Supporting phase judge function, it can automatically identify phase connect wrong, connect reverse situation, and alarm prompt.