DVC power analyzer Application of GPS in charge and discharge detection of photovoltaic energy storage inverter

1. Charge and discharge detection of photovoltaic energy storage inverter converter

At the same time, measure the DC current and voltage on the input side of the inverter or converter and the AC current and voltage on the output side, and accurately evaluate the charging and discharging performance of the inverter or converter.  

Charge and discharge detection circuit

Equipment used:

DEWE3-PA8 

TRION3-1820-POWER-4 

CT-1000   

DEWE3-PA8 integrated host:  

The integrated sensor power supply can be 8 Current sensor supply ； Up to 4 sheets can be added TRION3 -1820-POWER-4 power acquisition card conducts 16 voltage and 16 current tests; The range of high-voltage channel can reach ± 2000Vpeak, and the range of current channel can reach 40Apeak; Test precision: DC ± 0.02% * reading ± 0.02% * range; AC 0.5~1kHz: ± 0.03% * reading without range error; There is no gap storage, and the signal waveform can be viewed without oscilloscope. CT-1000: DC/AC 1000A, basic accuracy:<0.05%

Test content:

1.1 Charge discharge conversion time detection Use AB cursor to calculate charge discharge conversion time.

1.2 Current error and constant current charging current stabilization accuracy detection Use the function formula to directly calculate the DC current error or constant current charging current stabilization accuracy.

1.3 The ripple coefficient detection of constant current charging current can directly calculate the peak to peak value of DC voltage and the effective value after filtering DC by using statistical formula, and then calculate the ripple effective value coefficient and peak coefficient by using functional formula.

1.4 Detection of voltage error and constant voltage charging and voltage stabilizing precision Use function formula to directly calculate DC voltage error or constant voltage charging and voltage stabilizing precision.  

1.5 The ripple detection of constant voltage charging voltage can directly calculate the peak to peak value of DC voltage and the effective value after filtering DC by using statistical formula, and then calculate the effective value coefficient and peak coefficient of ripple by using functional formula.