Power Inverter Circuit Diagram

Due to the exhaustion of traditional energy sources and people’s attention to the environment, the power system is facing tremendous changes, and distributed power generation will become the future development direction of the power system

With its unique advantages, photovoltaic power generation is recognized as one of the most technologically advanced and promising technologies

The biggest feature of the inverter used in the solar power generation system is the function of tracking the maximum power point.

Inverter protection mainly includes:

1) Instantaneous overcurrent protection. When the current flowing through the inverter device reaches an abnormal value (exceeding the allowable value) due to a short circuit on the load side of the inverter, etc., the inverter will be stopped instantaneously to cut off the current. Converter

When the output current reaches an abnormal value, the inverter operation is also stopped.

2) Overload protection. The output current of the inverter exceeds the rated value and continues to pass for more than the specified time. In order to prevent damage to the inverter during the period and the circuit, the operation must be stopped. Proper protection requires inverse time characteristics, using thermal relays or electronic thermal protection (using electronic circuits). The overload is caused by too large GD (inertia) of the load or the motor is blocked due to the overload.

3) Instantaneous power failure protection. For an instantaneous power failure within a few milliseconds, the control circuit works normally. However, when the instantaneous power failure time is more than 10s, it will usually cause the control circuit to malfunction and the main circuit can not supply power, so the inverter will stop working after detection.

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