GPTR Grid Generator And Load Simulator Launched

GPTR three-phase grid generator and load simulator has been designed for testing of control systems that govern the behaviour of equipment that must work connected to a three-phase grid. Automated Computing Machinery's GPTR includes two sets of three generators, synchronous among them: three for the actual grid generation (V1, V2 and V3 voltage lines) and three to emulate the currents measured through current transformers (I1, I2, I3).

The parameters of each generator (voltage or current, and relative phase to V1 generator) as well as the common frequency are controlled by an external program, through a RS485 half-duplex line. The equipment includes a calibrated power measuring unit (three phase, four quadrants, class 0.5 per cent) that is used for on-line calibration of each generator. Voltage generators: 0-420V rms, in 1V steps (built-in over-current tripping behaviour adjusted to 12mA rms in each channel, for safety reasons).

Current generators: 0-1A rms with 4ohms output impedance, in steps of 2mA rms. Frequency: adjustable between 39-61Hz, in 1Hz steps. Phase adjustment: all signals can be specified with a relative phase to V1 generator, between 0-360, in one step. Calibration: the equipment includes a measuring unit with certified calibration that is used to measure the real generated signals.

Its measurements are read by the microcontroller and used to calibrate internally the parameters for each generator. This is done with a specific command. This unit is four quadrants, class 0.5 per cent, power analyser provided with certified calibration. Option HT facilitates the easy specification and execution of 'holes in the grid', according to the typical specification parameters.

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