CN104750002A

CN104750002A - FPGA based multi-way pulse feedback controller for PSM high-voltage power

Info

Publication number: CN104750002A
Application number: CN201510136707.XA
Authority: CN
Inventors: 张健; 郭斐; 孙浩章; 吴友国; 沈晓岭; 黄懿赟
Original assignee: Institute of Plasma Physics of CAS
Current assignee: Institute of Plasma Physics of CAS
Priority date: 2015-03-26
Filing date: 2015-03-26
Publication date: 2015-07-01

Abstract

The invention discloses an FPGA based multi-way pulse feedback controller for a PSM high-voltage power. The controller comprises an analogue treating unit, an FPGA, a communication caching unit, a digital quantity treating unit and a power treating unit, wherein the analogue treating unit comprises an analogue receiving part and an analogue output part; the analogue receiving part comprises a first signal conditioning circuit and a four-channel digital-to-analogue conversion circuit; the analogue output part comprises a second signal conditioning circuit and a four-channel digital-to-analogue conversion circuit; the communication caching unit comprises a nine-pin connector and an upper computer. According to the controller, reliable technical assurance is provided for the stable operation of a 140GHz electronic convoluting resonance heating system on an EAST nuclear fusion device; compared with the traditional controller, the controller has the advantages that high voltage control precision can be achieved, the control requirement of a convoluting pipe on power supply voltage can be met, and thus the complex requirement of various physical experiments can be met.

Description

A kind of PSM high-voltage power supply multiplex pulse feedback controller based on FPGA

Technical field

The present invention relates to the high voltage power supply control technology field based on PSM technology, particularly relate to a kind of PSM high-voltage power supply multiplex pulse feedback controller based on FPGA.

Background technology

Auxiliary heating system is the object given priority to as one of tokamak the most complicated most important system on each device in the world always, the trend that corresponding tokamak develops from pulse toward stable state, auxiliary heating high-voltage power supply also experienced by from pulse mode to long pulse and even the developing stage of equilibrium mode, as the state-of-the-art technology studied both at home and abroad recent years, the development of PSM switch power technology has also obtained a large amount of successfully application rapidly in auxiliary heating high voltage power supply.

In the high voltage power supply based on PSM technology, control object mainly comprises lead-in circuit breaker cabinet, soft start contactor cabinet, multi-winding isolation transformer, PSM module, output detections and protection etc., the core that whole high voltage power supply controls is exactly the control for single PSM module, by opening and shutoff of control PSM module, thus the number of serial module structure in control power supply, by opening the moment to each module, open the control of duration, the switch of output voltage can be realized, the controlling functions such as adjustment and modulation, meet the demand of different application occasion.

The precision controlling of output voltage is substantially the most also a most important part in all control, but due to the existence of various disturbance, to cause reality to export likely deviation theory value a lot, therefore how to address this problem and just seem particularly important.

Summary of the invention

The object of the invention is exactly the defect in order to make up prior art, a kind of PSM high-voltage power supply multiplex pulse feedback controller based on FPGA is provided, realize the switch control rule based on more or less a hundred PSM module in the high voltage power supply of PSM technology, and by introducing hardware based FEEDBACK CONTROL link, improve the control accuracy of output voltage, to meet the basic operation control overflow of gyrotron and even tokamak Physical Experiment.

The present invention is achieved by the following technical solutions:

A kind of PSM high-voltage power supply multiplex pulse feedback controller based on FPGA, include analog quantity processing unit, on-site programmable gate array FPGA, communication buffer unit, digital quantity processing unit and power supply processing unit, described power supply processing unit gives analog quantity processing unit respectively, on-site programmable gate array FPGA, communication buffer unit and digital quantity processing unit are powered, described analog quantity processing unit includes analog quantity receiving unit and analog output part, analog quantity receiving unit includes signal conditioning circuit one and 4 passage analog to digital conversion circuits, signal conditioning circuit one receives 0-10VDC analog signals and by 4 passage analog to digital conversion circuits, simulating signal is converted to digital signal and delivers to on-site programmable gate array FPGA, described analog output part includes signal conditioning circuit two and 4 port number analog conversion circuits, on-site programmable gate array FPGA sends to 4 port number analog conversion circuits by after the digital signal calculation process of reception, 4 port number analog conversion circuits are exported with 0-10VDC by signal conditioning circuit two after digital signal being converted to simulating signal, described communication buffer unit includes 9 needle connectors and host computer, on-site programmable gate array FPGA connects 9 needle connectors and host computer successively by RS232 serial ports, exchange the controling parameters between host computer and status information, described digital quantity processing unit includes digital quantity receiving unit and digital output part, digital quantity receiving unit includes 100 needle connectors one, level shifting circuit, complicated programmable logic device CPLD, the status signal that 100 described needle connectors one receive PSM module inputs into on-site programmable gate array FPGA by level shifting circuit and complicated programmable logic device CPLD successively, described digital output part includes signal drive circuit and 100 needle connectors two, on-site programmable gate array FPGA sends the digital quantity after process to PSM module by signal drive circuit and 100 needle connectors two, perform the switching manipulation of PSM module, described on-site programmable gate array FPGA and complicated programmable logic device CPLD are connected to 50M crystal oscillator.

Advantage of the present invention is: the present invention is that the stable operation of 140GHz Electron Cyclotron Resonance Heating system on EAST nuclear fusion device provides reliable technical guarantee, controller is more in the past compared, higher Control of Voltage precision can be realized, meet the control overflow of gyrotron for supply voltage, thus finally meet the complicated requirement of various Physical Experiment.

Accompanying drawing explanation

Fig. 1 is principle of work block diagram of the present invention.

Fig. 2 is feedback regulation process flow diagram of the present invention.

Fig. 3 is opened loop control design sketch under load disturbance.

Fig. 4 is closed-loop control design sketch under load disturbance.

Fig. 5 is input voltage opened loop control design sketch under fluctuation of load when improving 5%.

Fig. 6 is input voltage closed-loop control design sketch under fluctuation of load when improving 5%.

Embodiment

As shown in Figure 1, a kind of PSM high-voltage power supply multiplex pulse feedback controller based on FPGA, include analog quantity processing unit, on-site programmable gate array FPGA 1, communication buffer unit, digital quantity processing unit and power supply processing unit 14, described power supply processing unit 14 gives analog quantity processing unit respectively, on-site programmable gate array FPGA 1, communication buffer unit and digital quantity processing unit are powered, described analog quantity processing unit includes analog quantity receiving unit and analog output part, analog quantity receiving unit includes signal conditioning circuit one 2 and 4 passage analog to digital conversion circuit 3, simulating signal is converted to digital signal by 4 passage analog to digital conversion circuits 3 and delivers to on-site programmable gate array FPGA 1 by signal conditioning circuit 1 reception 0-10VDC analog signals, described analog output part includes signal conditioning circuit 24 and 4 port number analog conversion circuit 5, on-site programmable gate array FPGA 1 sends to 4 port number analog conversion circuits 5 by after the digital signal calculation process of reception, 4 port number analog conversion circuits 5 are exported with 0-10VDC by signal conditioning circuit 24 after digital signal being converted to simulating signal, described communication buffer unit includes 9 needle connector 6 and host computers, on-site programmable gate array FPGA 1 connects 9 needle connector 6 and host computers successively by RS232 serial ports 7, exchange the controling parameters between host computer and status information, described digital quantity processing unit includes digital quantity receiving unit and digital output part, digital quantity receiving unit includes 100 needle connectors 1, level shifting circuit 9, complicated programmable logic device CPLD10, the status signal that 100 described needle connectors 1 receive PSM module inputs into on-site programmable gate array FPGA 1 by level shifting circuit 9 and complicated programmable logic device CPLD10 successively, described digital output part includes signal drive circuit 11 and 100 needle connector 2 12, on-site programmable gate array FPGA 1 sends the digital quantity after process to PSM module by signal drive circuit 11 and 100 needle connector 2 12, perform the switching manipulation of PSM module, described on-site programmable gate array FPGA 1 and complicated programmable logic device CPLD10 are connected to 50M crystal oscillator 13.

In FEEDBACK CONTROL, the output voltage of adjustable module is fixed as 400VDC, now the Control of Voltage precision of system will be reduced to 200VDC by 400VDC, and control accuracy doubles; The FEEDBACK CONTROL flow process designed on this basis, logic is simple, reliable and stable, and its basic controlling flow process as shown in Figure 2.

Under open loop case, power supply operational factor arranges as follows: Vo=40kVDC, T=200mS, rising and falling time interval 1mS.Respectively unloaded, semi-load and complete carry situation under power supply Real output waveform as shown in Figure 3, can find out, actual output voltage fluctuates near setting value, and causes output voltage to change from 42kVDC to 39kVDC due to the fluctuation of load.Under same parameters, same loading condition, be operation with closed ring by electrical source exchange, Real output waveform as shown in Figure 4, can be found out, under three kinds of loading conditions, output voltage almost overlaps, and the fluctuation of load does not almost affect for output voltage.

Input voltage improves 5%, and under open loop case, power supply operational factor arranges as follows: Vo=40kVDC, T=200mS, rising and falling time interval 1mS.Respectively unloaded, semi-load and complete carry situation under power supply Real output waveform as shown in Figure 5, can find out, it is more that actual output voltage departs from setting value, and cause output voltage to change from 43kVDC to 41kVDC due to the fluctuation of load.Under same parameters, same loading condition, be operation with closed ring by electrical source exchange, Real output waveform as shown in Figure 6, can be found out, under three kinds of loading conditions, output voltage almost overlaps, and the fluctuation of input voltage, the fluctuation of load almost do not affect for output voltage.

Claims

1. the PSM high-voltage power supply multiplex pulse feedback controller based on FPGA, it is characterized in that: include analog quantity processing unit, on-site programmable gate array FPGA, communication buffer unit, digital quantity processing unit and power supply processing unit, described power supply processing unit gives analog quantity processing unit respectively, on-site programmable gate array FPGA, communication buffer unit and digital quantity processing unit are powered, described analog quantity processing unit includes analog quantity receiving unit and analog output part, analog quantity receiving unit includes signal conditioning circuit one and 4 passage analog to digital conversion circuits, signal conditioning circuit one receives 0-10VDC analog signals and by 4 passage analog to digital conversion circuits, simulating signal is converted to digital signal and delivers to on-site programmable gate array FPGA, described analog output part includes signal conditioning circuit two and 4 port number analog conversion circuits, on-site programmable gate array FPGA sends to 4 port number analog conversion circuits by after the digital signal calculation process of reception, 4 port number analog conversion circuits are exported with 0-10VDC by signal conditioning circuit two after digital signal being converted to simulating signal, described communication buffer unit includes 9 needle connectors and host computer, on-site programmable gate array FPGA connects 9 needle connectors and host computer successively by RS232 serial ports, exchange the controling parameters between host computer and status information, described digital quantity processing unit includes digital quantity receiving unit and digital output part, digital quantity receiving unit includes 100 needle connectors one, level shifting circuit, complicated programmable logic device CPLD, the status signal that 100 described needle connectors one receive PSM module inputs into on-site programmable gate array FPGA by level shifting circuit and complicated programmable logic device CPLD successively, described digital output part includes signal drive circuit and 100 needle connectors two, on-site programmable gate array FPGA sends the digital quantity after process to PSM module by signal drive circuit and 100 needle connectors two, perform the switching manipulation of PSM module, described on-site programmable gate array FPGA and complicated programmable logic device CPLD are connected to 50M crystal oscillator.