High-efficiency MPPT Circuit

Multi-MPPT Circuit Optimized for System Scale

Multi-MPPT is required to prevent a deterioration in system efficiency due to shadows or contamination in a specific module and string unit.
Since excessive MPPT circuits cause reduced efficiency, the number of MPPT circuits with capacity in an optimal array unit is required.

High-efficiency Circuit Method

Apply High Switching - Multi-Level Inverter

Reduces loss by reducing the capacity of passive components in the circuit by controlling high-speed switching of power semiconductor devices.

Applying a multi-level inverter circuit, the output waveform is sinusoidalized and the filter capacity is reduced to reduce loss.

Ground Fault Blocking Function

Mandatory automatic circuit separator in case of ground-fault in a solar DC circuit

Residual Current ▶ Leakage Current ▶ Ground-fault Current ▶ Arc ▶ Fire

Division of ground-fault blocking methods by grid-connected characteristic, Korea Electrical Safety Corporation 「Notice on How to Process Work for DC Ground-fault Circuit Break Device of Photovoltaic System」

Transformerless Solart Inverter DC Input Terminal : Detection of insulation resistance / AC Output Terminal : Application of a method for detecting residual current

A method for detecting residual current

Detecting residual current in proportion to the inverter output / Circuit Break an inverter at a fixed value

Implementation a high-precision top-level safety sequence for stopping/disconnecting an inverter when the residual current exceeds 30mA regardless of the inverter output

Korea Electric Power Corporation’s Requirements for Distributed Power Supply

A grid-support function for power system stabilization

Standardization of 14 requirements including a voltage-reactive power control function

Local/Remote Setting & Controlling through the dedicated DER communication network

Implementation of a grid-support function which is most suitable for Korean power system

Voltage-Reactive Power Control Function (Volt-VAR) : Control of inverter output reactive power according to system voltage

Frequency-Active Power Control Function (Frequency-Watt) : Control of inverter output active power according to system frequency

Function to Continuously Operate for Abnormal Voltage (Low/High Voltage Ride Through)

Function to Continuously Operate for Abnormal Frequency (Low/High Frequency Ride Through)

Smart O&M System to which AI Technology Is Applied

Solar photovoltaic facility hardware fault diagnosis and control software remote update

Existing Web-Monitoring ▶ Remote Control + AI Learning-based Predictive Maintenance System

Preemptive analysis by Machine & Deep Learning and predictive maintenance technology for faults in generating units including inverters

Control service available for remote control (remote stop, update, restart) before any fault and accident occur due to inverter fault prediction

Supply of O&M orders and reports through the smart device of relevant persons including users, safety managers, etc.

Free Supply of Monitoring RTU + Control Service + O&M Service

Provide a differentiated service by supplying monitoring hardware and the digital O&M service free of charge to customers when purchasing inverters

Contribute to securing energy security through the localization of solar photovoltaic facility monitoring data and the development of security service technology

Cost Improvement through the entire period of power generation

Levelized Cost of Electricity

(CAPEX + OPEX) / YEILD: Reduction in installation costs and operating costs and improvement of power generation

Need for the technology to reduce installation costs as well as the inverter price

Need for the technology to reduce O&M costs throughout the entire period as well as installation costs

Need for the technology to improve system operation efficiency as well as equipment efficiency

Concentrated Arrangement Technology of Distributed Power Converter

String Type Central Inverter (SCI)

Increase in distributed inverter efficiency, Reduction in central costs, Reduction in operating costs for concentrated arrangement

Comprehensive technology with high efficiency + safety + smartization + digital maintenance