PV on-grid power generation system is the solar photovoltaic power generation system connected with the conventional power grid, shared commitment to power supply tasks. When there is sunlight, the inverter will convert the DC power generated by the photovoltaic system into sinusoidal alternating current, the alternating current can be directly supplied to the AC load, and then the remaining power input to the grid, or directly will be generated all the power into the grid. In the absence of the sun, the load electricity is all supplied by the grid.
Because the power is directly input to the grid, the photovoltaic system in the PV system is completely replaced by the grid in the PV grid-connected system. Eliminate the configuration of the battery, eliminating the battery storage and release process, you can take full advantage of the photovoltaic array issued by the power, thereby reducing the energy loss, reducing system costs. But the system requires a dedicated grid-connected inverter to ensure that the output power to meet the grid voltage, frequency and other performance requirements. The inverter also controls the maximum power point tracking (MPPT) of the PV array to control the waveform and power of the grid current so that the power delivered to the grid is balanced with the maximum power power emitted by the PV array. This system is usually able to use the mains and solar photovoltaic systems in parallel as a local AC load power, reducing the overall system load power failure rate. And grid-connected photovoltaic systems can also play a role in the public grid peak peaking. Solar photovoltaic power generation into large-scale commercial applications is the only way, is the solar photovoltaic system access to conventional power grids, to achieve network power generation. Compared with the independent operation of solar photovoltaic power stations, into the grid can bring a lot of benefits to photovoltaic power generation, you can sum up the following:
1, save the battery as a storage;
2, with the inverter manufacturing technology continues to progress, after the stability of the inverter, reliability, etc. will be more perfect;
3, the PV array can always run at the maximum power point, by the grid to accept all the energy generated by solar energy, improve the efficiency of solar power;
4, the grid to obtain the benefits of decentralized PV system can provide electricity for local users to ease the power transmission and distribution burden;
5, the perfect combination of photovoltaic modules and buildings, both power and can be used as building materials and decorative materials.
Solar photovoltaic power generation is to rely on solar cell components, the use of semiconductor materials, electronic properties, the light energy into electricity. And the grid-connected power generation system through the photovoltaic array will receive the solar radiation energy through the high-frequency DC conversion into high-voltage direct current, after the inverter inverter power grid output and the same frequency, with the phase of the sinusoidal AC current.