Large-power three-phase AC standard source

The utility model discloses a large-power three-phase AC standard source. The standard source comprises a control signal input module, a three-phase signal generation module, a power amplification module, and an output feedback module having an input end connected with the output end of the power amplification module and an output end connected with the input end of the three-phase signal generation module. The four modules are sequentially serially connected. The three-phase signal generation module is composed of a 1.2GMAC digital signal processor DSP, high-speed high-precision D/A converters and operational amplifiers. The standard source further comprises an isolation transformer. The DSP is controlled by the control signal input module to output six-path digital signals. The six-path digital signal output end of the DSP is respectively sequentially connected with one D/A converter, one operational amplifier, one power amplification module and one isolation transformer. Then the six-path digital signals are output. The power amplification module is composed of high-fidelity large-power power amplification circuits. The standard source can output three-phase AC current and voltage signals with stability higher than 0.01%, a voltage reaching over 1600 volts, a current standing at more than 250 amperes and an on-load capability recording more than 300VA.