A command current generation algorithm for load simulation of three-phase phase-controlled rectifier bridge

A phase-controlled rectification and command current technology, applied in the direction of converting AC power input to DC power output, electrical components, and output power conversion devices, to achieve the effects of good testing, increasing load types, and good power supply load capacity

Active Publication Date: 2019-02-22
STATE GRID TIANJIN ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with the three-phase uncontrolled rectifier bridge, the three-phase phase-controlled rectifier bridge is more widely used, and the harmonic characteristics of its input current are more diverse, and it is more suitable as a load for evaluating the load capacity of the power supply under test. However, the current research Very few, so it is very necessary to carry out research on command current generation algorithm for three-phase phase-controlled rectifier bridge load simulation

Method used

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  • A command current generation algorithm for load simulation of three-phase phase-controlled rectifier bridge
  • A command current generation algorithm for load simulation of three-phase phase-controlled rectifier bridge
  • A command current generation algorithm for load simulation of three-phase phase-controlled rectifier bridge

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Embodiment Construction

[0052] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0053] A command current generation algorithm for load simulation of a three-phase phase-controlled rectifier bridge is developed in figure 1 The given three-phase phase-controlled rectifier bridge load is realized. u in the picture a , u b and u c is the three-phase input voltage; i a i b and i c is the three-phase input current, that is, i a i b and i c is the three-phase command current; the DC side is the RLC load, u L is the inductor voltage drop, u c is the capacitor voltage, i L is the DC side current; VT 1 —VT 6 is a thyristor, and the corresponding trigger pulse is g 1 — g 6 , Interval ①: g 1 → g 2 ; Interval ②: g 2 → g 3 ; Interval ③: g 3 → g 4 ; Interval ④: g 4 → g 5 ; Interval ⑤: g 5 → g 6 ; Interval ⑥: g 6 → g 1 ; 1 ~α 6 They are the firing angles of the six intervals, and the phase A voltage

[0054] Th...

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Abstract

The invention relates to an instruction current generation algorithm for load simulation of a three-phase phased control rectifier bridge. According to the technical characteristics, the instruction current generation algorithm comprises the following steps of determining boundary conditions of six conduction intervals within a fundamental period of the three-phase phased control rectifier bridge; determining judgment conditions of different circuit working states in the six conduction intervals and obtaining corresponding circuit equations; and carrying out discrete solving on the circuit equations in the six conduction intervals by a backward difference method to obtain an instruction current of the three-phase phased control rectifier bridge. The instruction current generation algorithm is given aiming at the load of the three-phase phased control rectifier bridge; the type of the load simulated by an existing power electronic load is increased; the capability of the power electronic load for simulating the nonlinear load is improved; the calculation accuracy is relatively high; the simulation accuracy requirements can be met; and the instruction current generation algorithm can be widely applied to the nonlinear load characteristic simulation of the power electronic load and can relatively well test the power loading capacity.

Description

technical field [0001] The invention relates to a three-phase phase-controlled rectifier bridge technology, in particular to a command current generation algorithm for load simulation of a three-phase phase-controlled rectifier bridge. Background technique [0002] Electric energy devices (AC regulated power supply, UPS, switching DC power supply, AC motor driver, etc.) need to undergo strict aging tests and related dynamic and steady-state load tests according to standard requirements before leaving the factory to ensure the quality of power supply equipment. The traditional way to evaluate the power supply is to select the combination of resistance, inductance and capacitance as the resistive, resistive-inductive or resistive-capacitive load, and select the uncontrolled rectifier bridge as the nonlinear load. This method obviously has the disadvantages of large power consumption, inflexible load, and low degree of automation. Therefore, a flexible, green, and efficient tes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/162
CPCH02M7/162
Inventor 宋鹏先张郁颀孟峥峥周凤争满玉岩唐庆华
Owner STATE GRID TIANJIN ELECTRIC POWER
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