How to solve the problem of measuring power and efficiency of photovoltaic inverters?

According to the scale development indicators provided by the National Energy Administration, my country's solar power generation installed capacity will reach 160 million kilowatts in 2020, and the annual power generation will reach 170 billion kilowatt-hours. Photovoltaics is the fastest growing energy variety in the world. The efficiency and reliable operation of the core photovoltaic inverter directly affect the power generation and benefits of the power station!

GB/T 30427-2013 "Technical Requirements and Test Methods for Grid-connected Photovoltaic Power Generation Inverters" issued by the General Administration of Quality Supervision, Inspection and Quarantine at the end of 2013 provides technical requirements and test methods for testing grid-connected photovoltaic power generation inverters with an AC output voltage not exceeding 400V.

The conversion efficiency of general photovoltaic inverters can reach more than 96%, but this parameter is the test data of the manufacturer under simulated load conditions in the laboratory. When the photovoltaic inverter is working on site, the efficiency will change due to the influence of its own performance, light illumination, load rate, input voltage, environment, etc.

The portable power analyzer NORMA 6000 is now available! It is specially developed and produced for on-site testing by technicians. It can measure inverter efficiency, current harmonics, power factor, DC component, etc.

Features

Built-in lithium battery, can work continuously for 10 hours

Easy to carry, can record all parameters for a long time, 32G memory

Clear menu structure and connection guide in Chinese, easy to operate;

2000A AC and DC current clamp (80mm jaws, 0.8% accuracy) and 1500V voltage measurement probe;

CAT IV 600V/CAT III 1000V safety level to protect personnel and equipment safety;

· Dual-machine interconnection can be expanded to 8 channels, and communication and data synchronization can be performed

Applies to

Manufacturer Product Performance Testing

·Research projects of universities and research institutes

·Quality Inspection Department Product Performance Inspection

Test system integrator

User operation and maintenance & energy saving assessment

Inverter test items specified in the standard

Inverter efficiency

Grid-connected current harmonics

Power factor

DC component

Test plan