H20-681-ENU 무료 덤프문제 온라인 액세스

MPPT - The working principle of maximum power point tracking is that the microprocessor periodically adjusts the duty ratio D of the PWM periodically to change the output current of the solar cell during a specified period, thereby causing the output voltage of the solar cell to change. The solar cell output voltage and output current are calculated, and the output power of the solar cell array is calculated, and then the position of the maximum power point is found according to the maximum power point tracking strategy.

• A.True
• B.False

Huawei SUN2000L household inverter indicator LED1 status is "green slow flash", LED2 status is "off", which means "DC is not powered, AC is powered on".

• A.True
• B.False

Which of the following communication methods are supported by Huawei SUN2000L household inverter? (Multiple choice)

• A.PLC
• B.4G
• C.RS485
• D.Wifi

The initial power-on process of the Huawei SUN2000L household inverter is to check before power-on, close the AC and DC switch, and check the status of the indicator.

• A.True
• B.False

The problems faced by the agricultural and photovoltaic complementary photovoltaic power station program are _____. (Multiple choice)

• A.How to overcome the problem of sub-array dispersion and irregularity
• B.How to reduce the waste of cultivated land resources
• C.How to prevent the communication cable from being easily cut off
• D.How to prevent fire, electric shock and other safety accidents