Distributed photovoltaic power generation anti-island protection device WBG-611

Distributed photovoltaic power generation anti-island protection device


WBG-611 island protection device is to meet the needs of various small photovoltaic power automation, on the basis of summarizing the years of power station automation system development, research experience, according to the needs of the enterprise, according to the characteristics of power supply and distribution system, for power users, with cost-effective protection, measurement, control and communication in the new computer protection device, suitable for 0.4KV voltage level photovoltaic island protection and measurement and control.The WBG-611 anti-island protection device can be installed separately in the low-voltage switchgear or centrally in the control room.

Distributed photovoltaic power generation anti-island protection device

1.1 Product characteristics
n Integrated metal fully enclosed chassis design, dust-proof, anti-corruption, anti-pollution ability;
n platform machine core design, more convenient maintenance, greatly reduce the outage time of the protected object;
The n device and operating power supply flexibly support AC and DC power supply (AC220, DC220);
n Powerful message storage function, which can record the latest 32 protection action reports;
The n WBG-611 protection device provides local monitoring function with a friendly interface to meet the different requirements of on-duty and relay personnel;
The n main CPU adopts the high-speed 32-bit DSP (digital signal processor) chip;
n uses 12864 dot matrix liquid crystal display, display content is rich and clear, beautiful appearance;
Both n hardware and software designs are modular to upgrade and extend functionality.
Distributed photovoltaic power generation anti-island protection device
1.2 Main technical parameters
1.2.1 Rated data
AC / DC power supply: 220V, allowable deviation + 15%, -20%
AC voltage: 100V,57.7V
AC current:, 5A, 1A
Frequency: 50HZ
1.2.2 Power consumption
AC Voltage Circuit: <0.5VA / phase (at rated voltage)
AC current circuit: <0.5VA / phase (In=1A)
<1VA / phase, (In=5A)
DC circuit: normal <15W
The Trip is <25W
1.2.3 Remote remote measurement grade
Current: level 0.2
Others: Level 0.5
1.2.4 Distant letter resolution
Less than 2ms.
1.2.5 Signal input mode
passive bus.
1.2.6 Simulation quantity input
After the external current and voltage input is isolated and transformed by the isolation transformer, the low pass analog filter, the CPU is processed by sampling digital, various protection relays are formed and various remote measurements are calculated.
The protection current passes through the protection CT of the device, and the voltage signal (UA, UB, UC) is converted into a voltage signal through PT, and then input to the A / D converter after low-pass filter, anti-interference device, protection circuit and operational amplifier can input ± 10V, converted into a digital signal into the CPU, and protected after operation.Measuring the CT is obtained by protecting the CT after internal amplification.The voltage UA also serves as an input to the frequency detection circuit.
The voltage and flow rate of the input of each device is different, but the principle is consistent, and only the analog amount of the input is listed in the device description section.
Distributed photovoltaic power generation anti-island protection device
1.2.7 Overload capacity
(1) AC current circuit: 2 times rated current working continuously; 10 times rated current working for 10s; 20 times rated current working for 1s.
(2) AC voltage circuit: 1.2 times the rated voltage working continuously.
(3) Power supply circuit: 80% -120% rated voltage works normally.
1.2.8 Insulation performance
(1) The insulation resistance between all circuits and the enclosure is less than 100 MΩ under standard experimental conditions.
(2) The medium strength between all circuits and the housing can withstand AC 50Hz, voltage 2kV (effective value) and 1min test without insulation breakdown or flashover.