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The PTQ2000_S1 microcomputer quasi-synchronization device (hereinafter referred to as the device) is a fully digitally controlled product, which can reliably integrate the generator into the power grid, or connect multiple generators in parallel with each other.
◆The device has the following features:
1. Fast parallel connection, small closing rush current in parallel connection;
2. All-digital circuit, not disturbed by temperature and environment;
3, easy to operate, safe and reliable, fundamentally remove the operation
The mental tension of the personnel basically prevents the occurrence of side-by-side accidents.
Main function:
1. The device can be used for grid-connected multiplexing of generators or lines, and has the function of automatically identifying the nature of grid-connected;
2. There are multiple tuning parameters for the same period, which is convenient for tuning according to site requirements;
3. The device uses an accurate and rigorous mathematical model to ensure that the first occurrence is captured when the difference frequency is connected to the grid (the generator pair system or the line between the two decoupling systems is connected to the grid). The zero phase angle difference of , can not be impacted and connected to the grid;
4. The device controls the frequency and voltage of the parallel unit according to the fuzzy control theory algorithm during the grid connection of the generator to ensure the fastest and most stable frequency difference and pressure difference. Enter the setting range to achieve fast grid connection;
5. The device has the function of automatically identifying the difference frequency or the same frequency grid connection. When the line is connected to the grid at the same frequency (closed loop), such as the power angle and voltage on both sides of the parallel point When the difference is less than the set value, the grid connection operation will be implemented immediately;
6, the device can be applied to line voltage 100V, line voltage 400V system. After connecting according to the terminal label, modify "parameter 1" at the same time;
7. When the same frequency occurs during the process of motor difference frequency grid connection, the device will still automatically give the "close" command according to the phase angle difference, without eliminating the same frequency state
8. The device can ensure that there is no reverse power grid connection and reactive power advancement when needed;
9. With undervoltage protection function (undervoltage value can be set according to user requirements, parameter 12);
10. The device adopts fully enclosed and strict electromagnetic and photoelectric isolation measures, which can adapt to harsh working environment;
11. The working power supply of the device is AC/DC dual-purpose type, which automatically adapts to AC/DC100-250V power supply.
◆Use environment:
1. Operating temperature -23°C～+40°C;
2. The relative humidity of the air is not more than 90% (25℃);
3. Places without conductive and explosive dust and corrosive gases;
4. Places without severe vibration and impact.
Main technical indicators:
1. The system side and standby side voltage of the input device can be applied to line voltage AC100V, AC400V.
AC400V power consumption is not more than 0.5VA.
2. In generator synchronous working mode, output "close", "accelerate", "decelerate", "boost", "step down", "fault" Wait for the relay to normally open passive switch signal, the contact capacity is 500VAC/5A, and the action time is less than 10ms.
3. In the line synchronization working mode (that is, set the output mode of the device to "remote signal"), all the contact capacities are the same as the above 2 points, but "accelerate" and "decelerate" "Boost" and "buck" are redefined. "Increase" is redefined as "power angle overrun", and "deceleration" is redefined as "same frequency" between the system side and the parallel side "Boost" is redefined as "low voltage" on the side to be paralleled, "buck" is redefined as "high voltage" on the parallel side, fault", "synchronization" relay output contacts It is the same as the generator synchronous working mode.
4. If necessary (via RS-485 communication), the synchronization device can provide continuous system side and standby side voltage, frequency, phase difference and status information for the "wave recording device" "Record.
5. Measurement accuracy: the frequency is ±0.0Hz (35-65Hz range), the angle is ±1° (when the voltage on both sides is higher than 46VAC), the voltage is ±1V ( ( ( 100V) or ±1% > 100V);
6. Working power AC/DC100-250V, power consumption not more than 15VA;
7. Dielectric strength: strong electric circuit to ground can withstand: 2000VAC. 50Hz. 1 min;
Weak current circuit can withstand to ground: 500VAC.50Hz. 1min;
Tolerable between strong and weak current circuits: 1OOOVAC. 50Hz. 1min;
