The wind turbine measurement and control system adopts a cascade structure, which is composed of a wind power generator, a rectifier, an unloading controller, a battery, a boost chopper circuit, an inverter, and an output filter.
Due to the randomness and variability of wind resources, the power and voltage generated by wind turbines are unstable. Therefore, in off-grid small wind power generation systems, it is generally necessary to install an energy storage device, usually a battery energy storage system. For safety and reliability, the battery is mostly 48V low voltage design.
Taking China's single-phase 220V/50Hz power distribution system as an example, the low-voltage AC power of the wind turbine is converted to DC by a rectifier, and the charger converts 48V DC into a high-voltage DC of about 380V, and then converts it into 220V/ by the inverter. 50Hz AC, power is supplied to the load via the output filter. To prevent fan overspeed, the discharge controller provides load to the fan under strong winds, light loads or fault conditions. Based on the above analysis, the small wind power generation system has the characteristics of high wind energy utilization rate and stable output voltage.
The load specificity of the load is taken into account in the wind power system, and its load is variable. In order to achieve the purpose of improving the transient response characteristics of the inverter under the load change condition, a double closed-loop design of voltage and current, that is, digital PI control of the current inner loop and the voltage outer loop is adopted in the control part of the inverter circuit.
China Cable Granulator,Wire Granulator supplier & manufacturer, offer low price, high quality Copper Wire Granulators,Cable Granulator Machine, etc.
[Conical co-rotating twin-screw cable material granulator" has many superiorities ,such as owning high yield (10 to 20 tons/day),ultra-low power consumption (lowest electricity consumption:90kwh for 1 ton of finished product), good mixing and plasticization (high-pressure and plasticization),and can add high proportion of calcium carbonate to the materials (up to 400),and also can be reproduced for 100% reclaimed material with full exhaust and high pressure .It is the best choice for all kinds of cable material granulation, such as PVC,PE,LSNH,and cross-linking,etc.
Cable Granulator,Wire Granulator,Copper Wire Granulators,Cable Granulator Machine
Zhoushan Tongfa Machinery Co.,Ltd , https://www.tongfa-machinery.com