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Safety mechanisms, wake up and shutdown methods in distributed power installations

專利號(hào)
US11888387B2
公開日期
2024-01-30
申請(qǐng)人
Solaredge Technologies, Ltd（IL Herzeliya）
發(fā)明人
Meir Adest; Guy Sella; Lior Handelsman; Yoav Galin; Amir Fishelov; Meir Gazit; Yaron Binder
IPC分類
H02J1/00; H02M1/32; H02M3/158; G01S3/786; H01L31/02; H02H3/20; H02J1/10; H02J3/46; H02M7/493; H04B3/54; H02J3/38; H02J7/35; H02M1/00
技術(shù)領(lǐng)域
inverter,power,string,voltage,islanding,grid,converter,in,signal,output
地域： Herzliya Pituah

摘要

A distributed power system including multiple DC power sources and multiple power modules. The power modules include inputs coupled respectively to the DC power sources and outputs coupled in series to form a serial string. An inverter is coupled to the serial string. The inverter converts power input from the serial string to output power. A signaling mechanism between the inverter and the power module is adapted for controlling operation of the power modules. Also, for a protection method in the distributed power system, when the inverter stops production of the output power, each of the power modules is shut down and thereby the power input to the inverter is ceased.

說明書

As a result of having a separate MPPT circuit in each converter 205a-205d, and consequently for each solar panel 101a-101d, each string 203 may have a different number or different specification, size and/or model of panels 101a-101d connected in series. System 20 of FIG. 2 continuously performs MPPT on the output of each solar panel 101a-101d to react to changes in temperature, solar radiance, shading or other performance factors that effect one or more of solar panels 101a-101d. As a result, the MPPT circuit within the converters 205a-205d harvests the maximum possible power from each panel 101a-101d and transfers this power as output regardless of the parameters effecting other solar panels 101a-101d.

The outputs of converters 205a-205d are series connected into a single DC output that forms the input to inverter 204. Inverter 204 converts the series connected DC output of converters 205a-205d into an AC power supply. Inverter 204, regulates the voltage at the input of inverter 204. In this example, an independent control loop 220 holds the voltage input to inverter 204 at a set value, say 400 volts. The current at the input of inverter 204 is typically fixed by the power available and generated by photovoltaic panels 101.

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