Huawei SUN2000-23KTL User Manual

SUN2000 (8KTL-28KTL)
User Manual
2 Overview
Issue 07 (2014-07-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
16
Figure 2-12 Conceptual diagram for the SUN2000-8KTL, SUN2000-10KTL, and
SUN2000-12KTL
The working principles of the SUN2000 are described as follows:

The SUN2000 analyzes the operating status of each PV array over the input current
measure circuit and generates an alarm to prompt maintenance if an exception occurs in
a PV array.

The DC switch disconnects internal circuits from the DC input to facilitate maintenance.

The category II DC surge protection device (SPD) on the input side provides the
discharge loop for the overvoltage power on the DC side to protect the SUN2000 internal
circuits from DC overvoltage.

The input and output electromagnetic interference (EMI) filters filter out the
electromagnetic interference inside the SUN2000 to ensure that the SUN2000 meets
electromagnetic compatibility requirements.

The MPPT circuits ensure optimal output power by measuring the voltages and currents
of PV arrays and tracking the MPP.

The DC-AC conversion circuit converts DC power into AC power and then feeds the AC
power to the power grid. The output frequency and voltage match the power grid.

The LC filter filters out the high-frequency components from the output current of the
SUN2000 to ensure that the output current meets power grid requirements.

The output isolation relay isolates the inverter from the power grid if either of them is
faulty.

The category III AC SPD on the output side provides the discharge loop for the
overvoltage power on the AC side to protect the SUN2000 internal circuits from AC
overvoltage.
Working Modes
Figure 2-13 shows the conditions for the SUN2000 to switch between working modes.

Huawei SUN2000-23KTL Specifications

General

Brand	Huawei
Model	SUN2000-23KTL
Category	Inverter
Language	English