China-Made Solar Inverter with Stable Performance Produced by The World-Selling Jdsolar

JDSOLAR grid-connected inverters are used in a wide range of applications, not only for large and medium-sized industrial and commercial solar power plants, but also for small-scale home solar photovoltaic power plants.

The grid-connected inverter is a special type of inverter. In addition to converting direct current into alternating current, the output of the alternating current can be synchronized with the frequency and phase of the mains, so the output of the alternating current can be returned to the mains. Grid-connected inverters are commonly used in some DC voltage sources (such as solar panels or small wind turbines) and grid connections.

The inverter converts the DC power to AC power for return to the grid. The output voltage of the grid-connected inverter must be the same as the grid frequency (50 or 60 Hz). It is usually achieved with the oscillator in the machine and also limits the output voltage not to exceed the grid voltage. Modern high-quality grid-connected inverters can have a power factor of 1, indicating that the output voltage and current phases are the same, and the phase difference between the grid voltages is within 1 degree. A microprocessor in the inverter senses the AC waveform of the grid and uses this waveform to generate a voltage that is sent back to the grid. However, the electricity sent back to the grid needs a certain proportion of reactive power, so that the power of the nearby power grid is within the allowable limits. Otherwise, if the proportion of renewable energy in a certain regional power grid is high, when high power is produced (for example) At noon) its voltage may rise too high.

If the grid's power is cut off, the grid-connected inverter needs to be fast and the grid is offline. This is the National Electrical Code (NEC) regulation to ensure that when the grid is powered off, the grid-connected inverter will not provide power to the grid, and workers who repair the grid will not be shocked.
With proper configuration, grid-tied inverters allow a home to use its own alternative energy source (such as solar or wind) without the need for complicated wiring or batteries. If the alternative energy source is insufficient, the insufficient part will still be provided by the electricity of the grid.