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Current-sharing controller for direct current parallel technology of variable frequency generator set

A generator set and current controller technology, applied in the field of control and inverter, can solve problems such as speed oscillation, unstable voltage and frequency, unbalanced generator output current, etc.

Inactive Publication Date: 2012-07-04
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] To sum up, the parallel connection technology of variable frequency generator sets adopts the AC parallel synchronous control method, which can realize the phase consistency of the output voltage of the two generators and realize parallel operation. However, periodic oscillation of power and current often occurs, accompanied by the speed Oscillation, voltage and frequency instability, and the output current of the two generators is not balanced

Method used

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  • Current-sharing controller for direct current parallel technology of variable frequency generator set
  • Current-sharing controller for direct current parallel technology of variable frequency generator set
  • Current-sharing controller for direct current parallel technology of variable frequency generator set

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Embodiment Construction

[0020] The invention relates to a current sharing controller of the DC parallel technology of the variable frequency generating set, such as Figure 1-Figure 6 Shown, it is characterized in that comprising main control module MCU1, main circuit 2, switch control circuit 3, main control module MCU uses PIC18F2320 single-chip microcomputer, finishes the A / D conversion of analog signal, and control system PID algorithm and pulse width modulation PWM output; The main circuit 2 is composed of a rectifier circuit 21 and a filter circuit 22. The rectifier circuit 21 includes rectifier diodes D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12. The filter circuit 22 includes capacitors C1, C2 and resistors R1, R2. Capacitor circuits C1, C2, R1 and R2 connected to the front end of the IGBT in the main circuit can prevent the power tube from generating overvoltage during the shutdown process. The switch control circuit 3 includes a power device 31 , an overvoltage protection (detection) ...

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Abstract

The invention discloses a current-sharing controller for the direct current parallel technology of a variable frequency generator set. The current-sharing controller is characterized by comprising a master control unit (MCU), a main circuit and an on-off control circuit, wherein the MCU adopts a PIC18F2320 singlechip, finishes the analogue / digital (A / D) conversion of an analogue signal, and controls a system proportion integration differentiation (PID) algorithm and pulse width modulation (PWM) output; the main circuit consists of a rectifier circuit and a filter circuit, and is connected with the on-off control circuit; the on-off control circuit comprises a power device, an over-voltage protection circuit, a signal acquisition circuit and a power device insulated gate bipolar transistor (IGBT) driving circuit; the over-voltage protection circuit is connected with the fourth pin of the MCU; the signal acquisition circuit is connected with the ninth and tenth pins of the MCU; and the power device IGBT driving circuit is connected with the twelfth and thirteenth pins of the MCU.

Description

technical field [0001] The invention relates to a variable frequency generating set, in particular to a current equalizing controller used for controlling the DC parallel technology of the generating set, and belongs to the technical field of inverter and control. Background technique [0002] The key technologies for parallel connection of generating sets: one is synchronous technology, and the other is current sharing technology. At present, the parallel technology of variable frequency generating sets is mostly applied in AC parallel synchronous technology, which is used to solve the consistency of frequency, phase and voltage of power modules. The AC parallel technology adopts a synchronous control method and is completed using a synchronous controller. The following are currently commonly used synchronization methods: [0003] (1) The centralized controller makes the frequency and phase the same as the synchronous signal. This technology is relatively simple, easy to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/06H02M3/155H02M1/08H02H7/125
Inventor 徐查庆
Owner 徐查庆
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