CN203589729U

CN203589729U - Multiple self-adaption fault tolerance control active power filter

Info

Publication number: CN203589729U
Application number: CN201320791861.7U
Authority: CN
Inventors: 杨立军; 季晓兰; 毛宇阳; 邹积勇; 杨志; 薛恒怀
Original assignee: WEIFAN INTELLIGENT ELECTRICAL HI-TECH Co Ltd
Current assignee: WEIFAN INTELLIGENT ELECTRICAL HI-TECH Co Ltd
Priority date: 2013-12-03
Filing date: 2013-12-03
Publication date: 2014-05-07
Anticipated expiration: 2023-12-03

Abstract

The utility model relates to a multiple self-adaption fault tolerance control active power filter. The filter comprises a multiple APF system power unit which is composed of a converter P1, a converter P2,..., and a converter PN, wherein the rated capacity of the multiple APF system power unit is S. The converters receive drive signals of PWM1, PWM2,..., and PWMN through an optical fiber, and at the same time send the fault signals of ERR1, ERR2,..., and ERRN to a controller through the optical fiber, wherein the drive signals are sent by the controller. According to the utility model, the work mode is dynamically adjusted according to the actual operation condition of a device in a work process; the problem that the reliability of the device is reduced, which is caused by the increase of the power unit, can be effectively improved; and the device can persistently and effectively work in a certain allowed fault range.

Description

The Active Power Filter-APF of a kind of multiplex self-adapted tolerance control

Technical field

The utility model relates to a kind of Active Power Filter-APF correlation technique, relates in particular to a kind of multiplex Active Power Filter-APF.

Background technology

The requirement of the capacity of the fast development of modern science and technology to electric power system, Performance And Reliability is more and more higher, is promoting deepening continuously of power electronic technology research.Along with the application of power electronic equipment, day by day serious harmonic wave and idle problem cause that people more and more pay close attention to.Active Power Filter-APF (APF) is a kind of for dynamically suppressing the idle novel electric power electric device of harmonic compensation, and the electric current that this device can all change frequency and amplitude carries out dynamic compensation and is not subject to the impact of system impedance.

Along with the increase of APF capacity, the conventional current transformer of power device loss ratio in PWM current transformer is large, and after switching frequency improves, heating problem is outstanding, and along with the increase of capacity, the switching frequency that power device allows is more and more lower, and therefore, multiplex APF technology is arisen at the historic moment.The feature of multiplex APF is: main circuit adopts the three phase full bridge voltage PWM converter that power device is IGBT, and N organizes the public one group of DC capacitor bus of identical current transformer, is directly parallel in together by reactor simultaneously.Current transformer control adopts N heavily to change mode, and N current transformer adopts phase-shifting carrier wave control, and its triangular carrier phase place differs respectively 2 π/N.

Utility model content

The utility model is the Active Power Filter-APF of a kind of multiplex self-adapted tolerance control.In the course of the work according to device practical operation situation dynamic adjustments self mode of operation, can effectively improve the problem that device reliability that power cell increase causes reduces, guarantee the work that in certain fault allowed band device can continuous and effective.

Rated capacity be S multiplex APF system power unit by current transformer P1, current transformer P2 ..., current transformer PN composition, each current transformer by optical fiber receive controller send driving signal PWM1, PWM2 ..., PWMN, simultaneously by optical fiber to controller send faults itself signal ERR1, ERR2 ..., ERRN, hardware connection diagram is as shown in Figure 1.When system is normally worked, all current transformers all participate in work, when one of them current transformer generating unit fault sometime, controller receives and blocks this road after the fault message that this current transformer sends and drive signal, and in next switch periods, system is converted to (N-1) heavy chemical industry operation mode, now the rated capacity of system is also corresponding is reduced to original S * (N-1)/N, and when the current transformer sum breaking down is more than or equal to N/2, system quits work.

Beneficial effect: in the course of the work according to device practical operation situation dynamic adjustments self mode of operation, can effectively improve the problem that device reliability that power cell increase causes reduces, guarantee the work that in certain fault allowed band device can continuous and effective.

Accompanying drawing explanation

Fig. 1 is the utility model hardware connection diagram.

Fig. 2 is control principle schematic diagram of the present utility model.

Fig. 3 is the control principle drawing of specific embodiment.

Embodiment

Fig. 2 is control principle schematic diagram of the present utility model, current transformer P1, current transformer P2 ..., current transformer PN driving signal PWM1, PWM2 ..., PWMN pulse duration equate, phase phasic difference 2 π/N, system rated capacity is S, switch periods is TS.Suppose that some converter modules of t1 moment (supposing that P4 module is between PN-1 module herein) break down, controller receives and blocks this road after the fault message of this module and drive signal, and in next switch periods, system is converted to (N-1) heavy chemical industry operation mode, it is 2 π/(N-1) that each road drives the triangular carrier phase shift phase place of signal, and now the rated capacity of system is also corresponding is reduced to original S * (N-1)/N; Suppose that t2 moment current transformer P3 module breaks down, controller receives and blocks this road after the fault message of this module and drive signal PWM3, and in next switch periods, system is converted to (N-2) heavy chemical industry operation mode, it is 2 π/(N-2) that each road drives the triangular carrier phase shift phase place of signal, and now the rated capacity of system is also corresponding is reduced to original S * (N-2)/N; The converter module quantity breaking down in etching system in the time of can supposing tx is by that analogy x, this Time Controller control system is converted to (N-x) heavy chemical industry operation mode, it is 2 π/(N-x) that each road drives the triangular carrier phase shift phase place of signal, and now the rated capacity of system is also corresponding is reduced to original S * (N-x)/N.When x is less than N/2, system works on; When x is more than or equal to N/2, system quits work.

Specific embodiment one: 300A triple modular redundant APF system

This embodiment has 3 converter modules, and Fig. 3 is this embodiment control principle drawing.Driving signal PWM1, PWM2, the PWM3 pulse duration of lower 3 converter modules of normal operating conditions equate, phase phasic difference 2 π/3, and system rated capacity is 300A.Suppose that t1 moment current transformer P2 module breaks down, controller receives and blocks this road after the fault message ERR2 of this module and drive signal PWM2, and in next switch periods, system is converted to double chemical industry operation mode, it is π that each road drives the triangular carrier phase shift phase place of signal, the now also corresponding 200A that is reduced to of the rated capacity of system; Suppose that t2 moment converter module P1 or P3 break down, controller receives and blocks this road after the fault message ERR1 of this module or ERR3 and drive signal PWM1 or PWM3, and the converter module quantity 2 that judgement is broken down is greater than 1/2nd of converter module sum 3, and therefore system quits work.

Claims

1. the Active Power Filter-APF of multiplex self-adapted tolerance control, it is characterized in that comprising rated capacity be S multiplex APF system power unit by current transformer P1, current transformer P2 ..., current transformer PN composition, each current transformer by optical fiber receive controller send driving signal PWM1, PWM2 ..., PWMN, simultaneously by optical fiber to controller send faults itself signal ERR1, ERR2 ..., ERRN, when system is normally worked, all current transformers all participate in work, when one of them current transformer generating unit fault sometime, controller receives and blocks this road after the fault message that this current transformer sends and drive signal, and in next switch periods, system is converted to (N-1) heavy chemical industry operation mode, now the rated capacity of system is also corresponding is reduced to original S * (N-1)/N, can obtain by that analogy the converter module quantity breaking down in system is sometime x, this Time Controller control system is converted to (N-x) heavy chemical industry operation mode, it is 2 π/(N-x) that each road drives the triangular carrier phase shift phase place of signal, now the rated capacity of system is also corresponding is reduced to original S * (N-x)/N, when x is less than N/2, system works on, when x is more than or equal to N/2, system quits work.