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In the power system, the parallel operation of synchronous generator and line transformer is often carried out. In order to ensure the safe and rapid integration of the synchronous generator into the grid, a quasi-synchronous controller must be used.
The PTQ2000A1 microcomputer intelligent quas...
◆Ensure to capture the first time of grid connection, accurate, fast, reliable and shock-free grid connection;
◆Automatic variable parameter frequency modulation, voltage regulation, accurate prediction of closing phase angle;
◆It can be used for low voltage 400V, high voltage 100V, single generator, single line closing and grid connection;
◆The synchronization parameters that can be set according to the requirements are: allowable pressure difference, allowable frequency difference, the actual rated voltage of the TV on the side to be paralleled, the actual rated voltage of the TV on the system side, Overvoltage protection value, TV secondary voltage angle of system side, allowable power angle;
◆This device has power grid disconnection, generator disconnection, grid frequency deviation > 3Hz, generator frequency deviation > 5Hz, abnormal grid voltage, and excessive generator overvoltage. Various fault detection functions: these faults are not allowed to issue a synchronous closing command.
◆With generator voltage, generator frequency, grid voltage, grid frequency, generator and grid voltage difference, generator and grid frequency difference, generator and grid phase difference number display function.
◆The parameters can be modified in real time for special generators; all parameters are password protected;
This unit has various fault detection functions:
（1) The power grid is offline (the grid voltage and frequency are displayed as 0, and the fault indication is maintained for 76 seconds )
(2) Generator offline (generator voltage and frequency are displayed as 0, and the fault indication continues )
(3) grid frequency deviation>3Hz (refer to grid frequency display, fault indication continues)< /span>
（4) generator frequency deviation>5Hz (except when starting, see display, fault Instructions continue)
（5) The grid voltage is abnormal (over, under voltage, see the grid voltage display, the fault indication continues , fault relay action)
Generator overvoltage (see generator voltage display, fault indication continues, fault relay action)
These faults are not allowed to issue a synchronous closing command.
