A tester for an AC dual-power standby switching system based on high-voltage constant-voltage power amplifier output

Abstract

The invention discloses a tester of an AC dual-power backup power automatic switching system based on high-voltage constant-voltage source power amplifier output. The tester comprises a signal processing given unit, and a push-pull output stage, a power amplification stage, a sample protector, an output network, AC output and a module power supply which are connected with the signal processing given unit. The tester is characterized in that the signal processing given unit is configured to conduct subtraction on AC small voltage signals of external input and AC voltage feedback signals of output of the power amplification stage to output amplified error signals. The push-pull output stage is configured to amplify positive half waves and negative half waves of the error signals. The power amplification stage is configured to conduct power amplification on the positive half waves and the negative half waves to output AC sine-wave voltages. The output network is configured to conducting capacitive and sensible phase compensation on loads of the AC sine-wave voltages. The sampling protector is configured to be disconnected from external given small signals and output voltages when theloads exceed a set voltage or current threshold.

Description

technical field [0001] The invention belongs to the technical field of test instruments, and in particular relates to a test instrument for an AC dual-power backup input system based on the output of a high-voltage constant-voltage source power amplifier. Background technique [0002] In the process of power production and transmission, in order to ensure the reliability of power supply and minimize power outages for users, substations and important users generally adopt a power supply mode in which dual power sources or multiple power sources are mutually backup. Switching device") is an intelligent control device to realize this function, and its safe and reliable operation is the key to ensure the automatic switching of backup power supply. [0003] The main test item of the AC dual power backup switching device is whether the backup switching controller can operate reliably and serve as backup for each other. [0004] The traditional backup controller test device mainly...

AI Technical Summary

Problems solved by technology

However, this detection method has many disadvantages, such as bulky pressure regulating equipment, non-isolated high-voltage output may endanger the personal safety of test personnel, and high dispersion of test results, etc.

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