Inverter electric power with instant voltage and current dual loop digital control

Abstract

The invention discloses an instantaneous voltage and current dual-loop digital control inverted power supply. The output end of a current controller is connected with the control end of an inverter; the output end of the inverter is connected with the input end of a voltage transducer and a load; the output end of the voltage transducer is connected with a negative input end of a first subtracter; the positive input end of the first subtracter receives reference quantity; the output end of the first substracter is connected with the input end of a voltage controller; the direct current end of the inverter is connected with a direct current power supply; the current led out from the inverter is connected with the input end of a current transducer; the input end of the current transducer is connected with the negative input end of a second substracter; the positive input end of the second transducer is connected with the output end of the voltage controller; and the output end of the second substracter is connected with the current controller. The inverted power supply is quick in response, small in error, and small in wave distortion of output voltage under nonlinear load condition. The inverted power supply is widely applied to alternating stabilized power supplies, uninterruptible power supplies, flexible alternating current input systems, superconducting magnetic energy storage systems, and renewable energy resource power supply systems.

Description

technical field [0001] The invention relates to a power conversion circuit, in particular to an inverter power supply with instantaneous voltage and current double-loop digital control. Background technique [0002] The performance of VLSI has been rapidly improved and the cost has been continuously reduced, which has promoted the development trend of full digital control of inverter power supply. Compared with analog control, digital control has the following advantages: From the perspective of noise and drift effects, digital controller is far superior to the corresponding analog controller; it can quickly perform complex calculations with constant accuracy, and has strong anti-interference ability; It is easy to change the control program (controller characteristics), highly versatile, and easy to upgrade; it has strong monitoring functions and easy system maintenance; digital components are small in size, light in weight, and easy to standardize. [0003] Compared with ...

AI Technical Summary

Problems solved by technology

The digital controller of the inverter power supply uses repetitive control to suppress periodic disturbances and improve the steady-state response of the system, but the dynamic response is not fast; the deadbeat control has a faster dynamic response speed, but the control performance has a great impact on the system parameters. Sensitive to changes, poor robustness, may reduce system stability or even become unstable; conventional PI digital control has slow dynamic response and poor control accuracy

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