May 23 held a State Council executive meeting made ​​it clear that " self- supporting solar and other new energy products into public facilities and family ." From which we can clearly appreciate the country will accelerate the development of solar distributed generation .

In fact , the favorable development of distributed power generation is not limited to this. Back in April , " distributed generation management approach " and " and network management approach" Bill had been introduced to the public for comments. And subsequently , "renewable energy quota system ," the discussion paper issued in early May and is expected to begin early next year I implemented .

Series of good news shows that countries have solar http://www.gridtiepowerinverteronline.com/ power on a very important position , and began to increase efforts to promote the development of solar distributed generation . Distributed generation is relative to the centralized power plants in terms of . According to " distributed generation and network management approach ( draft ) " , " distributed generation " is defined as : Located near the location of the user , not to the large-scale long-distance transmission of electricity for the purpose of the power generated by the user in addition to their own use and the nearest use , the excess electricity fed into the local distribution grid power generation facilities , power generation systems or power output of the energy cascade utilization of integrated multi- CISS .

Market Distribution of electricity and solar energy distribution does not completely coincide . As the larger eastern electricity , land prices are more expensive , if the construction of large-scale centralized ground station will greatly improve the cost , is not conducive to large-scale promotion of solar power ; rich in solar energy development in the western region centralized power stations, long-distance transport of electricity will emerge loss problems . Therefore, the state of solar distributed generation policy guidance and support , and promote the domestic PV market installed capacity from large centralized to distributed power station roof and small changes in public facilities , in fact, fully in line with the status quo of China's PV market development law .

According to experts , the domestic development of distributed power plants need to focus on solving three problems , namely policy areas , pattern links, technical aspects . At present, the European and American market has formed a very mature about the distributed generation model, through the planning guide , incentives, reasonable price mechanism and other means , many developed countries, the proportion has been fairly distributed energy high . For example, the amount of distributed generation in Denmark even more than half of total electricity generation .

With the domestic policy-oriented determination of foreign advanced model will be the promotion of rapid replication , so now the most important and need to be addressed , but is that technical aspects of the problem . At present, because solar power itself is unstable, the domestic terms of the relative aging power grid will have a relatively large impact , even a threat to network security issues. To solve these problems , in addition to hardware upgrades from the grid , the solar power system side , especially the technical reliability of PV wind turbine inverter is particularly important .

East China Power developed the production of "500KW PV Grid Inverter" passed up the only low voltage ride through technology certification bodies "State Grid Electric Power Research Institute, the National Energy solar power research and development (experimental) centers" in low-voltage ride through (LVRT) test.

According to the National Energy Board, the State Grid Corporation of photovoltaic power plants and power generation requirements and grid PV inverter must have low voltage ride through capabilities to ensure normal and stable operation of the grid, has LVRT capability for entering the PV field of a threshold.

Based on this, as a rising star of the domestic photovoltaic power generation, Weihai Huadong Power Co. 500KW pure sine wave power inverterindependently developed a collection company more technical experts to form the low voltage ride through experimental research team initiated research the technical problems, and finally passed with the only low voltage ride through technical testing qualification Nanjing State Grid EPRI test trial, which was obtained by following the Eastern power "Golden Sun", "TUV" certification is another important "weights", fully embodies the East China power as a quality , a professional manufacturer of photovoltaic inverters strong technical strength, expanding its PV inverter market, domestic inverter creates a favorable impact on high-end brands.

East China Power photovoltaic industry stick to the "independent research and development, high-end alternative" road, after recent years to cultivate and incubation, has formed 10KW-500KW PV Grid Inverter, off grid inverter, combiner box, AC and DC power distribution cabinets, etc. complete product series, and other countries have been completed Wen Deng Nanhai Golden Sun Project photovoltaic demonstration project.

LVRT test is passed, marking the East China Power PV market more competitive, improve product quality and technical level to a new level, fully equipped to undertake different types of photovoltaic project conditions, and has entered the National Energy Board, State Grid Corporation of photovoltaic power plants and power generation threshold.

Recently, the U.S. Satcon Technology (Satcon Technology Corporation), the U.S. manufacturer of lithium-ion battery A123 Systems, U.S. Renewable Energy Service Company (Renewable Energy Services) and the Sacramento Municipal Utility District (SMUD) to obtain the California Energy Commission granted 2,000,000 dollar project funding , the funds will be used for energy storage technology development, thus helping to reduce intermittent renewable energy phenomenon.

According to the project manager Satcon party issued a statement saying , this is determined by the Energy Commission grant funds outreach programs - Community Energy Research (PIER) for renewable energy projects - the project aims to develop energy solutions , thus contributing to renewable energy which gradually penetrate into the energy grid .

Satcon has headquarters in the United States explained that the research team aims to develop " integrated solar power energy storage system " that can support voltage and frequency stable photovoltaic electricity (PV firming), real-time rate of change of power transmission and control . This solution will be the development of Sacramento Municipal Utility District 's California headquarters .

Specifically , Satcon PV sine wave inverter will provide technical expertise , A123 will provide "advanced " lithium -ion battery technology. Satcon said that the final system will be a 500kW PV array , 500kW of PowerGate Plus inverters and a 500kWh of A123 advanced lithium-ion battery energy storage system configuration .

It is expected that this energy storage system will be able to " take advantage of high-power http://www.gridtiepowerinverteronline.com/, high-pressure Satcon battery power conditioning system (Satcon Spectrum PCS), so as to stabilize the voltage , frequency control , and in the case of grid instability ( including power outage ) the PV plant continuous operation .

Satcon CTO Leo Casey said that we are trying to integrate with the grid for renewable energy , improve handling and improved energy storage systems , thereby reducing the volatility of output power , this is the key. Over the past four years , we have been committed to research and development in this area and has been used in several projects , including commercial PV systems , energy storage projects , the development of solar energy grid integration systems as well as by the U.S. Department of Energy funded demonstration projects. California Energy Commission project will accelerate the development of next-generation storage technologies and applications, this is the core of the future power grid .

Governments and power companies are expected , photovoltaic (PV) power generation will supply the amount of energy they account for a large proportion. The solar cell is converted into direct current and alternating current power grid synchronization , the design can be demanding in the future even more so. PV inverters have a wide power range and operating conditions to achieve maximum efficiency , and must also comply with strict safety requirements. Ultimately depends on performance of the inverter based power accurately measured . PV inverter manufacturers need to work closely with the sensor manufacturer , to ensure support for the latest trends in photovoltaic technology .

Our world is asked to use "green" renewable energy alternatives to fossil fuels to benefit the environment . Forecast for the near future reality of the power supply system includes a variety of energy scenarios , in which there are a variety of configurations scale solar energy , both covering several hectares of large-scale power plants , there are also single-family use of the device.

This will promote the photovoltaic (PV) solar inverter market, strong growth. Even in the current economic downturn , it is expected PV market in 2013 will reach 34 billion U.S. dollars . About PV market considerations , a relatively new device is expected of all sizes will be connected to the grid ; Even the single-family home system, if the load generating capacity exceeds local needs , but also to the power transmission and sale of electricity companies .

PV system to achieve its potential, it is necessary to improve the efficiency of power generation in order to reduce the cost per kilowatt . As we all know , solar cell manufacturers have been working to enhance the solar radiation into electricity based efficiency ; manufacturers are designing the next generation of photovoltaic inverters, diagnostics and other features by adding increasing power and efficiency , increased intelligence and functionality. The latest trend is a multi- string technology : the series connected solar cell consisting of a plurality of series connected to a single inverter , wherein each cell has its own maximum power point tracking (MPPT) device , thereby maximizing energy production . Solar power cells are difficult to use .

Battery is open, the output voltage of about 0.6 volts nominal : Normally each solar panel up to 72 cells , the formation of 44 volts open circuit. The battery can be a certain level of short-circuit current of the output . At a point between these limits , the battery voltage and current in a lower maximum power output . This maximum power point with the operating conditions ( such as the projection of solar radiation ) changes, so this point, the inverter solar grid tie inverter must be tracked in order to maintain maximum efficiency. Designers rely on the instantaneous voltage and current data acquisition sensor, software algorithms do this.

Ruan Shaohua : This TBEA new one megawatt integrated inverter stations, mainly to meet the current large-scale grid-connected power plants desert launch of integrated solutions , integrated photovoltaic inverter with integrated features needed , we built AC and DC power distribution cabinet . Mutation , surveillance units and the internal power distribution unit , and our fire and supervision unit , providing customers with a total solution to this .

The power plant construction to achieve a factory , we will plant inside the factory all internal links connected after all , and then shipped directly to the site after the site of a lifting, and then based on the reduction in the lifting scene of one pair the difficulty of construction requirements , reducing a construction site construction costs. We expect that such an integration room , it can reduce the scene of a construction cost about 15%. And our internal design is a lot of unique design, including our solar inverters are designed using the reverse can Yasumasa our entire power flow from the entire left and right sides , then symmetric one place , so the whole power of a single the direction of the cross does not exist , that can make our site easier to install wiring .

" Light " magazine : What if it is not this , this is such a box-type inverter system means that if we cover this house, it is probably the shortest period for how long can it ? Ruan Shaohua : Nearly shortest probably need twenty days or so, because you now need to dig the trench site , you need to do the technical field , finished room to do it , then go to the top do to deal with , but also in the interior stucco decoration this . In this case a construction period is relatively long, the second is the construction of some of the process would be more Fui Sha dust affect some internal life, but our interior decoration in the factory after completely clean of the internal do , you can improve our inverter life.

" Light " magazine : You also mentioned that this internal , then we are all from the internal side of TBEA do their own design ? Because sometimes if it is to help assemble some of the original parts will not conflict it ? Ruan Shaohua : This is all by our internal TBEA own design , of course, there 's some other tools , including fire , we are sourcing from the outside , directly in accordance with our criteria to assemble into us go, mainly to meet our on-site a time to repair , the other volume demand situation , of course, others , including our DC power distribution cabinet, our dc to ac inverter , we communicate that the internal distribution solutions , including our communication unit, are our Tebian Electrician own independent research and development , and then concentrated on the inside .

Ruan Shaohua : just introduced integration room , there is our communication unit and our internal power distribution equipment , then this is the DC power distribution cabinets, each row is 500 kilowatts , then that is 500 kilowatts DC cabinet, cabinet come on stream later on to the power distribution cabinet , and then enter the 500 kW inverter, and then through the AC power distribution output, and then proceeds here is the design, but also come from the DC side , and then come out here inverters after

Through this AC power distribution output , in this case , two 500 kilowatts a program constitute a whole , then our internal a ventilated through two doors an internal one into the wind, into the wind well, from the inverter a heat from the inside into the wind, and then back through the inverter directly into the inverter outdoors, we do not need extra additional ventilation equipment , we can ensure that our inverter temperature , is this whole the inverter is less than 3 degrees indoor temperature , our internal temperature higher than the outside temperature only less than 3 degrees .