Check whether the voltage of panels connected in series can reach the mppt tracking range of the inverter when a certain panel is under the intensity of sunlight, and whether it can generate electricity when 'he reaches it. For example, if it rained a few times. a few days ago, and the polysilicon of 230.21 is a string, mppt inverter 450 to 820v. The actual voltage measured that day was more than 500, and the theoretical voltage could reach 777V. The power of 50kw square grid is only 1.8kw.
Here are the following parameters :
■Can simulate the output characteristics of solar panels (I-V P-V curve);
■Can store different I-V curves under light and temperature, each with 128 points. The point distribution is intelligent (dense near the maximum power point and sparse on both sides). Has a constant power mode that can be individually adjusted Voltage, current and thenmaximum resistance;
■ With constant resistance mode, the internal resistance can be adjusted;
■ Accurate measurement of voltage and current allows you to record measuring instruments additional;
■ High voltage stabilization accuracy and low ripple voltage;
■ Can quickly store 9 sets of data, each set can memorize voltage values and values current. and power values, making calling quick and convenient;
■Has overvoltage, overcurrent, overheating and short circuit protection functions; the overvoltage protection limit and overcurrent protection limit are 0-110% of rated voltage and 0-110% of rated current. It can be set arbitrarily.
■Voltage, current and time setting, digital key input, high precision;
■ This machine can perform 30 setssets of different settings of voltage, current and power value at the same time. , And can perform 999999 consecutive cycle tests;
■With RS232C communication interface (RS485, GPIB are optional), the command execution time is less than 10ms.
■ Simulate the I-V curve
■ Simulate the I-V curve in each time period to better test the dynamic MPPT function of the photovoltaic inverter.