• Modular design, output power from 15kVA to 1080kVA

• Bi-directional AC/DC power source, seamless transition between source and sink modes

• Regenerative AC/DC load function

• Output: AC, DC, AC+DC

• Independent three-phase output, which can be configured assingle-phase output

• Max output 450V L-N within output frequency range from DCto 5kHz

• Frequency Range: DC~ 5kHz maxUp to 100th harmonic waveform generation, inter-harmonic generation

• Trigger out, TL signal output for voltage or frequency change

• AC output, ON/ OFF output phase angle can be programmed

• Using true current feedback control when working in CC mode

• RLC Load Simulation&RCD Load Simulation

• Current limit can be programmed, output can be shorted for

• short circuit test

• Bi-Polar DC Source (-BP option)

• Analog signal input for use as a power amplifier (delay ≤ 20 µs)

• 30 Built-in harmonic waveforms

• Soft start: effectively restrain the impulse current when power on TFT-Touch panel operation

• Master-Slave interface

• LAN, RS485, Analog control interface

• Emergency stop button and indicators on front panel

• Mod-bus/ASCII protocols

• CE conformity

• 13 months warranty

Grid Simulation

KGS series is comprehensive, fast dynamic grid simulator for distributed generation system testing, such as the electrical characteristics   of energy storage PCS, PV inverter, etc. The simulation functions include voltage and frequency fluctuation, voltage drop, high voltage   ride through, low/zero voltage drop, three-phase unbalance, harmonic and interharmonic etc. The KGS series meets the requirements of grid tied DG regulations testing, such as: grid voltage abnormality test, gridfrequency abnormality test, high voltage ride through test, low/zero voltage ride through test, anti-islanding test, etc. KGS series provides GUI software to simulate various real-world power grid   operating conditions.

• Voltage/frequency sequence programming

  The KGS series provides voltage and frequency sequence programming function. The parameters such as output voltage, frequency, slew rate, ON/ OFF output phase angle, duration time, switching time are programmable, and three phases are independent for settings.

     

  
  

• Harmonic and inter-harmonic waveforms

Dual DSP+FPGA technology is use in KGS series to generate up to 100th harmonic. KGS series supports interharmonics editing. Users   can program the phase angle and amplitude of the harmonic through the GUI, allowing generate three-phase harmonic/inter harmonic waveforms independently.

• Fast dynamic — Voltage drop simulation (LVRT test)

KGS series provides firmware and software support for low/zero voltage ride through tests.

Re-generative AC Load

In the regenerative AC load mode, CR mode, Rectifier mode, and CC/CP phase lead/lag mode are available. CR mode is used to simulate   three-phase resistive loads, the CR mode and threephase resistance parameters can be set through the panel and can realize the program   of resistance sequence. Rectifier mode can be used to simulate nonlinear loads, the CC/CP mode and CF (setting range: 1.414~3)   parameters can be set through the panel. CC/CP phase lead/lag mode can simulate sinusoidal current, Constant current CC and constant   power CP modes are available to adjust load current or power, phase angle can be set from 90°to -90° simulating the voltage and current   conditions under inductive and capacitive loads.

Regenerative DC electronic load mode is also available with the KGS series, which provides CV, CC, CP, and CR operation modes.

Current Source Mode

The KGS Series uses true current feedback control when working in Current source mode. It is different from power supplies using voltage feedback with constant current mode, which is called voltage controlled current. The voltage controlled current power supplies maintain   setting current value by adjusting output voltage and have relatively long response time to sudden impedance changes, which typically   results in dynamic current overshoot or undershoot as the load impedance changes. KGS series working in CC mode does not have such   problem and will always maintain the current at the setting value, regardless of transient load conditions.

Bi-Polar DC Source (-BP option)

The ZGX series supports bipolar DC output functionality, offering both twoport and threeport connection modes to accommodate diverse testing and application requirments.In twoport mode, users can flexibly select any two phases from the ABC threephase system as output terminals and set their voltage   polarity via software. For instance, phase A can be configured as the positive voltage output and phase B as the negative voltage output.   The output polarity can be easily reversed by reconfiguring phase A as negative and phase B as positive, enabling rapid polarity switching.In threeport mode, phase A serves as the positive voltage output terminal, phase B as the negative voltage output terminal, while the neutral terminals of phases A and B are connected together to serve as the protective earth (PE). This mode supports independent setting of positive and negative output voltages, allowing for either equal or unequal magnitude outputs, thus providing enhanced flexibility in voltage configuration.

Power Amplifier Function (analog signal input)

The KGS is a power amplifier with high dynamic response and bandwidth. The delay between input external signal and power source   output ≤ 20 µs.

RLC/RCD Load Simulation

The KGS series provides RLC load simulation mode, which simulates the impedance of the combinations of R, L and C components. The three phases are independently programmable, and the R, L, C values can be set respectively. KGS provides RCD nonlinear load simulation function for testing UPS power   supplies, inverters, etc. The KGS has four built-in RCD electrical topologies, 3- phase independently programmable, with individually programmable R, L and C parameter values.

Graphical User Interface

GUI software is installed in front touch panel, which uses Windows OS. The software provides following functions:

• Output limits and settings

• Sequence output settings: The output phase voltage, angle, frequency, ON/OFF phase angle, dwell time, switching time and other parameters of the power supply can be set.

• Real time display measurements: voltage, current, power, etc.

• Generate harmonic and inter-harmonic waveforms: Up to 100th

• harmonic waveform generation, inter-harmonic generation

• Capture, display and save output voltage and current wave-

• forms

• Display power source faults

           

-BP            Bi-Polar DC Source

--HV900    Increase output voltage to 900V L-N, consult factory