Programme of large terrestrial power station seen from heat and dust-proof container complex

Polaris solar PV net news: from 2011, the container application access solution for PV systems began in the desert ground domestic photovoltaic power stations by 2013, over 70% of large power stations, airports, industrial enterprises and other large roofing plant, have adopted the solution container. Container-type program in construction costs, construction schedule, and overall system performance, such as the significant advantages, mostly owners and the EPC decided early in the project design of container route. After more than two years and the application of improved domestic container programme has not only kept its at the beginning of grid access friendliness, with economic advantage, thermal dust-proof power plant operation and maintenance, such as skills upgrading are also in continuous improvement.

Programme thermal dust container appearance

Container program how to do well in heat and dust-proof

Focuses on development of large-scale photovoltaic power station in Northwest China, while enjoying a good light conditions, sand is one of the factors that must be incorporated into the design. PV inverter system with the core of access equipment, dust-proof, heat has always been EPC focused content, how to reduce power consumption and improve ventilation efficiency based on lifting the protection class of the device, reducing dust has always been equipment supplier continuous improvement directions.

Experts, the container programme, not simply install the PV inverter into a standard shipping container, but as an integrated platform for the overall design of the system container, including further enhance the efficiency of ventilation, which is where the core technology and the value of the programme.

Reasonable space to reduce power loss in ventilation duct system design, combined with internal devices improve cooling efficiency, specially designed to increase for all air inlet filter, and so on, are ordinary building could not be achieved, users select the container programme abandoned building technology-driven.

A few days ago, by 2011 the first domestic plant operations apply a container found in a sandy grave in Northwest China, 1MW container internal cleaning and dust removal is usually conducted once every six months, every time you need a staff member will take about two hours, dust-proof effect is better than building, greatly facilitated the plant operations to reduce costs.

“Cross-border” integration further enhance

Container programme as a design platform for market access system and widely received by later, as part of the system, container has also been higher dust and heat of expectations placed in the industry. Domestic manufacturers in the independent study at the same time, actively learn from the outcomes for similar solutions in other areas, starting with the wind.

History of development of wind power industry in industrial scale, are more mature than the PV industry. Wind farm in a rich wind resource area, sand dust but not the daily operation and maintenance of the wind farm and important points, wind turbine towers in thermal dust must have merit. After a comparative study of new container programme of dust control technology on the market. Experience of wind turbine tower in air intake duct design, container programme using air inlet at the bottom of the new way, after passing through the bottom of settlement, enter the inverter housing dust is greatly reduced.

Figure 1: schematic diagram of bottom air intake programme

Drawing fans and the practical application of foreign main suppliers ABB maintenance instructions, several first-line domestic manufacturers to use the bottom air inlet design of inverter PV system container programme, so that the internal cleaning and maintenance work only once a year, every time you need to only replace the air filter. To power plant owners and operators, which will further simplify the maintenance of large power stations, maintenance costs are negligible.

Heat and dust-proof set of worries

With the rise of distributed rooftop station, the group plans to return to the country of the EPC vision, caused in the industry in the past year to argue which one is better the large power station.

Senior inverters technical staff, string type, there are some disadvantages, just such abuse because life is short and haven’t been widely exposed. Day-to-day maintenance thermal dust such as power station, String scheme to ground station is at risk of desertification in Northwest China. And now the most widely used compared to the container programme, centralized inverter’s own dust-proof structure shell plus specialized modification of containers of double protection, and hang directly on the bracket of string inverter single protection, dustproof result is self-evident.

“Some string-type products, with no external fan without external ventilation only cooling through radiator, to enhance IP protection class internal dust to resolve device problems. Such programmes in the environmental quality of the area of application is feasible, but in the dust bowl swept Northwest of restaurant, equivalent to critical devices under the radiator without any protection of the external environment, heatsink of dust would be extremely serious. “Technical expert evaluation Institute.

Experts warned that as the sole device for cooling, dust accumulation is not only seriously affect the effciency and then reduce the efficiency of power generation, more likely danger are unable to heat instead of airplane bombing. If high-frequency cleaning to reduce risk, per MW up to 30-40 dispersed open-air installation of our products, it is difficult to estimate how much additional funding to sustain normal plant operations.

Figure 2: the string inverter cooler dust picture shows (from left: dust right: no dust)

According to the actual situation, against adverse weather conditions such as desert zone of large power stations, both here and abroad, are dominated by container-type scheme, such as Helios is designed for the desert region to launch the 2MW integrated pressure system integration solutions. Due to thermal, dust almost harsh requirements-string inverter applied to this would significantly enhance the power station operational risks and costs.

Original title: programme of large terrestrial power station seen from heat and dust-proof container complex

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