Source:JASE-W Japanese Smart Energy Products & Technologies

https://www.jase-w.eccj.or.jp/technologies/index.html

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Keywords

Y2

deviceZ4

electricity

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electrical machinery

Yokogawa Test & Measurement Corporation

Support for Improving Power Conversion Efficiency and Power Quality
in Solar Power Generation Systems, and Correlation Analysis of DataFeaturesu With up to seven inputs, a single unit of the WT5000 Precision Power Analyzer measures eachcomponent in a power conditioning system (PCS) including the converter, controller, and inverter.
u The power analyzer very precisely assesses the quality (output level, frequency and distortion) of theoutput power from a PCS to a power grid.
u The standard WT5000 can measure voltage up to 1500 Vdc and currents up to 30 A.
u Use of an optional external current sensor allows measurement of much higher currents up to 2000 A.
u The IS8000 software allows acquisition of numeric data synchronized with waveform data forcorrelation analysis.
Basic Concept or Summary
u Support for improving power conversion efficiency andpower quality of a PCS
With seven inputs, a single WT5000 Precision Power Analyzer
can measure power converted by a PCS and its efficiency. By
reducing the time required for development and evaluation, thisprovides increased efficiency. Many measured data can bedirectly viewed on the display. Fluctuations in power or efficiency
can be displayed as numerical values or on a trend graph toallow users to understand the fluctuations intuitively even in thefield.
u Correlation analysis of numeric data and waveform data inevaluation of an entire solar power generation system
Use of the IS8000 integrated software (optional) enables not
only recording and analysis of basic numeric data, such as thequantity of power generated and power conversion efficiency,
but also synchronization of data from the WT5000 and waveform
data from the DL950 waveform instrument. This allows for moredetailed analysis of the system behavior under abnormal
conditions by relating the waveform data to numeric data.

Effects or Remarksu A single WT5000 can complete evaluation work that used torequire multiple instruments
As a promising means of achieving carbon neutrality, mega solar
power generation systems are becoming more widespread. It isimportant to measure not only the maximum power conversion
efficiency but also the efficiency closer to that in actual use conditions(e.g. euro efficiency, CEC efficiency), which is obtained by weighting
according to a load factor the efficiencies measured at multiple points
under light load to rated load. In the PCS, Maximum Power Point
Tracking (MPPT) control maximizes the generated power. TheWT5000 constantly measures the voltage peak value, current peakvalue, and maximum instantaneous power value (+ side, - side,respectively) along with voltage, current, and power. This information
is not only utilized to evaluate a finished product but also contributes
to improved development efficiency.
u Improving the efficiency in verification of an entire solar
photovoltaic generation system
The IS8000 integrated software allows detailed analysis of the correlation between numerical data
related to power conversion efficiency and waveform data. Correlating the changes in numerical values
with the changes in waveform data is useful for verification of an entire solar photovoltaic generation
system and for identifying the causes of its problems.

Installation in Practice or Schedule
Domestic

The WT5000 is the flagship model in the WT power analyzer series. Yokogawa Test &Measurement Corporation has introduced the series to the domestic photovoltaic generation
market and has supplied models to manufacturers of electric vehicles, industrial equipment, andhome appliances, as well as major manufacturers and suppliers of photovoltaic generation
systems, mainly in PCS applications.

Overseas

The WT5000 model, which has a large global market share, is made used in Europe, North
America, and emerging countries including China as the testing device of choice for solar andwind power generation systems.

Contact:

Yokogawa Test & Measurement Corporation
E-mail (Customer Support): tm@cs.jp.yokogawa.com
URL: https://www.yokogawa.com/ymi/

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