显示标签为“industrial ups power supply”的博文。显示所有博文
显示标签为“industrial ups power supply”的博文。显示所有博文

2015年2月20日星期五

Centralized inverters

Centralized inverters
Centralized inverter system is generally used for large-scale photovoltaic power plants (> 10kW), the number of parallel PV strings are connected
To the same central inverter DC industrial ups power supply of the general three-phase IGBT power module, use less power field effect transistor, using DSP switch controller to improve the quality of the output power, making it very close to sinusoidal current. The maximum power of the system is characterized by high and low cost. But the influence of PV string matching and partial shading, resulting in efficiency and power capacity of the entire PV system. At the same time the entire photovoltaic power generation system reliability by poor working conditions of a photovoltaic cell groups affected. The latest research is the use of space vector modulation control, as well as the development of new inverter topology of connections to achieve high efficiency under partial load conditions. On SolarMax (Shohreh Mike) central inverter, you can attach an interface box PV array, photovoltaic panels on each string string monitoring, such as a string which is not working properly, the system will put the information passed to the remote controller, and can be stopped by a bunch of these remote control, so as not to because of the failure of a string of PV strings and impact of the work and reduce the energy output of the entire PV system
 

2015年1月27日星期二

When the on-line UPS power supply in normal

When the industrial ups power supply power supply in normal, power input voltage noise filter removes all the way through the grid frequency interference in order to obtain pure AC rectified and filtered into the rectifier and converts AC power to DC smoothing, then divide for two-way, all the way into the charger for charging the battery, the other way supply inverter, and inverter turn DC into AC 220V, 50Hz supply load.
When utility power outage occurs, AC input has been cut off, the rectifier is no longer working, then the battery discharge the energy delivered to the inverter, and then by the inverter converts DC into AC for load. Therefore, the load, despite the utility has ceased to exist, but this time the load is not interrupted due to electricity outage, you can still operate normally.