Application of MOS tube in energy storage converter

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Application of MOS tube in energy storage converter [Copy link]

1. Energy Storage AC (PCS
) Definition of Energy Storage Converter (PCS)
Energy storage converter, also known as bidirectional energy storage inverter, English name PCS (Power Conversion System), is the core component to realize the bidirectional flow of electric energy between the energy storage system and the power grid. It is used to control the charging and discharging process of the battery and perform AC-DC conversion.
Working principle of energy storage converter (PCS) The
working principle of energy storage converter is a four-quadrant converter device with controllable AC and DC sides to realize the bidirectional conversion of electric energy. The principle is to perform constant power or constant current control through microgrid monitoring instructions to charge or discharge the battery, and at the same time smooth the output of fluctuating power sources such as wind power and solar energy.

2. Advantages of MOS tubes in energy storage converter applications
High-efficiency
MOS tubes have low on-resistance and low switching loss, which enables the energy storage converter to operate at high efficiency, reduces energy loss, and improves the overall efficiency of the system.
Fast response
Energy storage converters need to respond quickly under various working conditions to ensure the stability of the system. The high switching speed and fast response characteristics of MOS tubes enable them to meet this demand and improve the dynamic performance of the system.
High-reliability
MOS tubes have the characteristics of high voltage resistance and high current, and can operate stably in harsh working environments, ensuring the high reliability of energy storage converters. At the same time, the protection circuit function of MOS tubes further enhances the safety of the system.
Simplified circuit design
MOS tubes have high input impedance and simple control, which makes circuit design easier, reduces the use of peripheral components, and reduces the complexity and cost of the system.
3. Typical application topology diagram

4. Recommended selection
When selecting a MOS tube, the following key parameters need to be considered:
Rated voltage (V_DS): The rated voltage of the MOS tube should be higher than the maximum operating voltage of the PCS to ensure that the device is not broken down under various working conditions.
Rated current (I_D): The rated current of the MOS tube should meet the maximum output current requirement of the PCS. Generally, the rated current should be greater than the actual operating current to provide sufficient margin.
On-resistance (R_DS(on)): Low on-resistance can effectively reduce conduction loss and improve overall system efficiency. When selecting, try to choose a MOS tube with low R_DS(on).
Switching speed: High switching speed can reduce switching loss and switching time, improve system efficiency and dynamic response performance.
Thermal performance: MOS tubes will generate heat during high-frequency switching. When selecting, its heat dissipation performance and thermal resistance need to be considered to ensure that the device operates stably within the operating temperature range.