1. application of the system
Meet 230kV transformer induction withstand voltage and partial discharge test, capacity 100MVA, no-load loss does not exceed 150kW.
Meet the partial discharge test of 10kV/450MW generator, power capacity 0.4uF, test voltage 23kV
2. Work condition
environment temperature： -10℃～+45℃
Maximum diurnal temperature difference： ＜25K
relative humidity： ≤90%
solar radiation intensity： 0.1W/cm²
altitude： ≤1000m
workplace： outdoor/indoor
No danger of fire or explosion
There is no gas containing corrosive metals and insulation
There is a reliable pickup point
The installation location is flat
3. Technical specification of the system
Main parameters
Model number and name： WJF-300kW Partial discharge induction voltage test system
Input working power supply： 3 phase 380V±10%,50Hz
Rated output power： 300kW
Rated output voltage: single phase 0～350V
Output voltage waveform： Standard sine wave, waveform deviation factor≤1.0%
Rated output frequency： 30～300Hz
Frequency resolution： 0.1Hz
PD： ≤10pC
Allowed elapsed time： Allowable operating time at rated capacity 180min
Noise levels： ≤65dB
4. Features
1)Variable frequency power supply can resist electric field interference. Under strong electric field interference, the measurement accuracy and control protection meet the requirements. Have good magnetic shielding, components, leads are made of high magnetic shielding material, no space radiation
2)With perfect protection function
Input voltage protection, over-voltage protection, short circuit (over current) protection, breakdown flashover protection, zero protection, power curve protection, power down protection, over temperature protection, cooling fan linkage protection, output voltage limit function protection
3)Frequency conversion power supply adopts high fidelity linear power amplification principle, there are no high order harmonics caused by IGBT switching circuit, ensure full sine wave output and very low electronic interference signal, Ensure very low PD(≤10pC)
4)Variable frequency power supply is equipped with special leads and plugs to connect with other equipment and a special grounding wire group.
9)Intelligent panel display variable frequency power supply control box
① Completely isolated mode
A Fiber optic connection is adopted between the variable frequency power supply cabinet variable frequency power supply control box and HV voltage divider, so complete isolation of the control unit and high voltage unit is realized!A variety of electromagnetic compatibility shielding measures and multiple protection are adopted inside the control box, At the flashover of the test product or the moment of equipment discharge, it can ensure that the control box itself is not damaged due to discharge, and guarantee the personal safety of the operator reliably.
②Intelligent control box
Integrated frequency conversion power supply control and high voltage measurement. Convenient for on-site monitoring. Specific operation and control functions are as follows:：
With start, stop, and emergency switch buttons;
With booster and buck rough and fine adjustment functions, the adjustment rate can be set;
with frequency coarse, fine adjustment function, adjustment rate can be set;
Equip with automatic selection function of radiator direction;
automatic and manual test selection (automatic tuning, automatic boost, and buck, etc)
With automatic, manual test mode (can set the test voltage, test time, automatic tuning, automatic voltage boost, and buck
has the function of setting test time. The timing time range is 0～99min, with Timing accuracy±0.1s, at the end of the period, sound prompts are provided to the tester.
The display includes: Output voltage, current, frequency, and output waveform;