General introduction about solar electrical energy generation and wind power generation

Shanghai Liyou Electrification Co.,Ltd specializes in providing various perfect engineering schemes for various renewable energy source electric power systems, such as solar electric power system, wind electric power system, fuel-cell electric power system and hydraulic electric power system, etc, our products are mainly used in renewable energy source grid-connected electric power systems, off-grid village power supply systems and various kinds of home power systems and can provide electric support for the communication, traffic and street lamp lighting, etc, in the regions with few power grids.

Controller (PV controller and wind-solar photovoltaic hybrid controller) regulates and controls the generated electrical energy. On the one hand, it sends the regulated energy to DC load or AC load; on the other hand, it sends the excess energy to the accumulator battery for storage, when the generated electrical energy can meet the requirements of loads, the controller sends the electrical energy in the accumulator battery to the loads.

After the storage battery is fully charged, the controller must guarantee that the storage battery can not be over-charged. When the electrical energy stored in the storage battery has been fully discharged, the controller must guarantee that the storage battery can not be over-discharged to protect the storage battery.

If the performances of the controller are not good, it will have a great effect on the service lifetime of the storage battery and finally influence the reliability of the system.

Accumulator battery is responsible for storing energy so as to guarantee load power utilization in the night and wet weather.

Inverter is responsible for converting direct current into alternating current for AC load use. Inverter is the core component of PV wind power system. Because territories of use are relatively backward and remote and it’s difficult for maintenance, in order to increase the global performance of PV wind power system, guarantee long-term and stable operation of power station, we raise very high claims for the reliability of inverter. In addition, the costs of new energy power generation are relatively high and therefore the highly efficient movement of inverter is also very important.

Renewable energy source grid-connected electric power system is a generating system which directly feeds the renewable energy sources produced by photovoltaic array, wind turbine and fuel cell, etc, into power grid in opposite directions through grid-connected inverter. The renewable energy sources don’t need to be stored by storage battery.

Because inputting electrical energy into power grid directly doesn’t need storage battery, cancels the process of storage battery storing and discharging energy and can take full advantage of the electrical energy generated by renewable energy sources to decrease energy losses and reduce system costs.

Grid-connected electric power system can use commercial power and renewable energy sources as the power supplies of local AC loads in parallel which reduces the loss of load probability of the whole system. Meanwhile, renewable energy source grid-connected system can regulate the peak of public power net.

Grid-connected electric power system is the development direction of solar and wind power generation and represents the most attractive energy utilization technology in the 21st century.