CN103236729A - TMS320F2812-based digital control system for uninterrupted power supply (UPS) - Google Patents
TMS320F2812-based digital control system for uninterrupted power supply (UPS) Download PDFInfo
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- CN103236729A CN103236729A CN2013101548339A CN201310154833A CN103236729A CN 103236729 A CN103236729 A CN 103236729A CN 2013101548339 A CN2013101548339 A CN 2013101548339A CN 201310154833 A CN201310154833 A CN 201310154833A CN 103236729 A CN103236729 A CN 103236729A
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Abstract
The invention discloses a TMS320F2812-based digital control system for an uninterrupted power supply (UPS). The system comprises a digital signal processing (DSP) master control module, a three-phase output balance adjustment module, a genlocking control module, a communication module and a fault protection module. The DSP master control module is bidirectionally connected with the genlocking control module, the three-phase output balance adjustment module, the communication module and the fault protection module. By implementing the digital control system for the high-power UPS disclosed by the invention, the space vector pulse width modulation (SVPWM) technology is adopted by a power switch tube, and the control of a rectifying circuit, a power factor correcting circuit and an inverter circuit is realized by the system to restrain three-phase output unbalance, so that a three-phase alternating-current voltage with high quality is output, and multiple parallel operation can be realized, so that the UPS is higher in stability and reliability.
Description
Technical field
The present invention relates to digitlization uninterrupted power supply (ups) Unity technical field, be specifically related to based on the online high power UPS control system of the three-phase of 32 bit DSP TMS320F2812.
Background technology
Along with important department, large-scale electric equipment are increasing to the high quality power supply demand, simultaneously in order to reduce because a large amount of harmonic pollutions that bring that use of power electronic equipment, UPS has obtained increasingly extensive application.UPS combines advanced power conversion, digital control, PWM(pulse-width modulation), the EMC(electromagnetic compatibility), technology such as redundant parallel operation, battery intelligent management and new technology, develop towards directions such as high frequencyization, total digitalization, intellectuality, networking, greenization, modularizations at present.Under good market prospects condition, along with the development of power electronic technology, the ups system design concept will deepen constantly and develop.UPS uses IGBT or MOSFET power device, makes it move towards high frequencyization, high efficiency; Adopt redundant technique, further strengthened capacity and the reliability of UPS, and intelligent UPS technology not only provides highly reliable electric power network management, and a solution also is provided for power supply is energy-conservation.
At present, aspect ups power, foreign capitals brand and China power supply enterprise are just in market with technically launching keen competition, and the selling at exorbitant prices if product function is powerful does not have good cost performance to be difficult to base oneself upon market yet.High frequencyization, digitlization, intellectuality and the modularized core of realizing UPS are exactly the research of control technology, the control technology of research UPS, and the quality that obtains high-quality output voltage waveforms is one of ups power Study on Technology focus.
Summary of the invention
The present invention proposes a kind of UPS Digitizing And Control Unit of the high performance-price ratio based on TMS320F2812, realized that the present invention is achieved through the following technical solutions to the control of the UPS of 10KVA ~ 500KVA:
UPS Digitizing And Control Unit based on TMS320F2812; it comprises that based on TMS320F2812 main control module, genlock control module, three-phase output balance adjustment module, communication module and error protection module described DSP main control module is connected with the error protection module is two-way with genlock control module, three-phase output balance adjustment module, communication module.
Further, described main control module comprises preposing signal process circuit, AD sample circuit, space vector pulse width modulation (SVPWM) signal generating circuit, rectifier control circuit and inverter control circuit; The AD sample circuit links to each other with preposing signal process circuit, and the SVPWM signal generating circuit is connected with rectifier control circuit, inverter control circuit respectively, and rectifier control circuit is connected with inverter control circuit.The genlock control module is connected with rectifier control circuit, inverter control circuit respectively.
Further, described three-phase output balance adjustment module comprises AD sample circuit, output voltage waveforms control module; The output voltage waveforms control module adopts positive sequence voltage controller, the negative sequence voltage controller based on rotating coordinate transformation.
Further, described fault protection system comprises input voltage and current detection circuit, output voltage and current detection circuit, cell voltage and current detection circuit and bypass/inversion commutation circuit.
Further, described genlock control module comprises general AD sample circuit, zero cross detection circuit and frequency acquisition unit.
Further, described communication module comprises the MCU(micro controller unit) display control board module and parallel operation communication interface circuit.
Further, the display control board module in the described communication module adopts the P89LPC938 chip of Philips company.
Details are as follows for operation principle of the present invention:
Described DSP main control module produces SVPWM drive waveform power switch pipe IGBT.Preposing signal process circuit is connected with the AD sample circuit, preposing signal process circuit is mainly finished the voltage to input and output, step-down and the bias treatment of electric current, make current signal can convert corresponding voltage signal to, make the voltage signal amplitude that enters DSP simultaneously within the permission voltage range of AD module input.TMS320F2812 has two AD modular converters, and nearly 16 analog input channels are arranged, and configurable sampling configuration simultaneously or sequentially can satisfy the demand of high-speed sampling and real-time system.The SVPWM signal generating circuit utilizes two event manager modules of TMS320F2812 to realize the output of SVPWM waveform.Rectifier control circuit adopts identical, interchangeable structural design with inverter control circuit.TMS320F2812 realizes the modulation to rectifier control circuit, inverter control circuit by producing the IGBT in SVPWM drive waveform rectifier control circuit, the inverter control circuit.
Described genlock control module inverter control circuit connects, and has realized UPS output voltage real-time tracking civil power in inverter control circuit, makes UPS and civil power synchronous operation, has guaranteed the stable and continuous that the bypass inversion is switched.Adopted a kind of general zero cross detection circuit in the genlock control module, with the signal shaping biasing that samples, utilize the capture unit in the TMS320F2812 task manager then, by the PI(proportional integral) regulate algorithm, realize the synchronous of UPS output voltage and civil power.
Described three-phase output balance adjustment module comprises sample circuit and output voltage waveforms control module.UPS output voltage waveforms control module is connected with the DSP main control module, particularly, is connected with inverter control circuit with SVPWM signal generating circuit in the DSP main control module.Comprise positive sequence voltage controller, negative sequence voltage controller in the output voltage waveforms control module.Three-phase output balance adjustment module has suppressed the output voltage distortion that unbalanced load causes effectively, has guaranteed that UPS still can keep the output voltage of three-phase equilibrium under any unbalanced load, obtain high-quality output voltage waveforms.
Described communication module comprises by MCU display control board module, parallel operation communication interface circuit.MCU display control board module adopts the P89LPC938 of Philips company as display control chip, by being connected with the GPIO interface of TMS320F2812, can inquire about the running status that current UPS is set.The parallel operation communication interface circuit is connected with the GPIO interface of TMS320F2812, adopts less order wire, and the information of mutual common synchronization signal and output voltage is conducive to parallel operation and the modularization of UPS.
Described error protection module is passed through input voltage and current detecting; output voltage and current detecting; cell voltage and current detecting; bypass/inversion switchings etc. are accurately located faults such as the overvoltage that may occur in service, overcurrent or under-voltage, undercurrents, and take appropriate measures to protect whole system.
Compared with prior art, the present invention has following advantage and technique effect: high power UPS Digitizing And Control Unit of the present invention is simple in structure, realizes easily, adopts the SVPWM technology, has improved the direct voltage utilance and has reduced harmonic pollution; Higher power factor correction ability is arranged; Solve three-phase output imbalance problem and Duo Tai UPS parallel operation problem, made UPS have high cost performance, better stability and reliability, had positive meaning for the high frequencyization that promotes UPS, intellectuality, greenization development.
Description of drawings
Fig. 1 is the overall construction drawing of UPS Digitizing And Control Unit;
Fig. 2 is the functional block diagram of UPS Digitizing And Control Unit;
Fig. 3 is the circuit structure diagram of UPS Digitizing And Control Unit.
Embodiment
Below in conjunction with accompanying drawing concrete enforcement of the present invention is described further, but embodiments of the present invention and protection range are not limited thereto.
As Fig. 1, in the overall construction drawing of UPS Digitizing And Control Unit, comprise DSP main control module, genlock control module, three-phase output balance adjustment module, communication module and error protection module.The DSP main control module is connected with the error protection module is two-way with genlock control module, three-phase output balance adjustment module, communication module.
As Fig. 2, described UPS Digitizing And Control Unit is divided into being achieved as follows of 5 modules:
Described DSP main control module is according to realizing that function is divided into preposing signal process circuit, AD sampling module, SVPWM signal generator, inversion control module and rectification control module with it.Whole system as shown in Figure 3, the DSP main control module is the control core of whole system, aforementioned AD sampling module and SVPWM signal generator can utilize TMS320F2812 to realize; The control algolithm of inversion control module and rectification control module can realize at dsp program simultaneously.Preposing signal process circuit is connected with the AD sample circuit, preposing signal process circuit is mainly finished the voltage to input and output, step-down and the bias treatment of electric current, make current signal can convert corresponding voltage signal to, make the voltage signal amplitude that enters DSP simultaneously within the permission voltage range of AD module input.TMS320F2812 has two AD modular converters, and nearly 16 analog input channels are arranged, and configurable sampling configuration simultaneously or sequentially can satisfy the demand of high-speed sampling and real-time system.Signal has also been done the linearity correction processing to data after the collection of AD module, make the data of sampling more accurate.The SVPWM signal generating circuit utilizes two event manager modules of TMS320F2812 to realize the output of SVPWM waveform.Task manager A passes through to produce the IGBT in 6 road SVPWM signals driving rectifier control circuit, and task manager B is by producing the IGBT in 6 road SVPWM signals driving inverter control circuit.The mechanism of production of two 6 road SVPWM signals is identical, because rectifier control circuit adopts identical, interchangeable structural design with inverter control circuit, its circuit theory is identical.So just realize rectifying part and inversion effect partly in the dsp chip control ups system, saved cost.
The SVPWM signal generating circuit is the core of DSP main control module, and the present invention adopts the SVPWM technology to realize the modulation of power switch pipe IGBT, and SVPWM utilizes the three-phase voltage basic vector to remove to approach the vector voltage circle, can obtain equivalent three phase sine waveform.With conventional SPWM(sinusoidal pulse width modulation) mode is compared SVPWM that following advantage is arranged: (1) direct voltage utilance is higher, has improved 15%; (2) under identical waveform quality condition, the SVPWM modulation system has lower switching frequency, effectively reduces the switching loss of IGBT; (3) the SVPWM modulation system has better dynamic property, can effectively reduce voltage, current harmonics.The built-in SVPWM signal generator of task manager module among the TMS320F2812 produces five-part form SVPWM signal with this module, can reduce the operand that produces the SVPWM waveform greatly.
Described genlock control module is according to realizing that function is divided into waveform modulate circuit and genlock control module.The waveform modulate circuit converts the sinusoidal waveform of civil power and output voltage the square wave of same frequency to, is input to the capture unit input port of dsp chip, for detection of the phase difference of civil power and output voltage.The genlock control module mainly in the dsp chip the inside, is utilized the aforementioned phase difference that calculates, and by PI control, has realized the synchronous of UPS output voltage and civil power.In genlock, adopted the method for " phase modulation position after the first frequency modulation rate ", efficiently solve output voltage and bypass voltage with frequency, synchronous problem.
Described three-phase output balance adjustment module, it is made up of sample circuit and output voltage waveforms control module.The control of UPS output voltage waveforms is realized that by DSP the controlled quentity controlled variable of module output can be used for controlling the SVPWM signal of output.The output voltage waveforms control module is passed through the FFT(fast Fourier transform earlier with unbalanced output voltage) calculate, obtain first-harmonic and harmonic component, then first-harmonic is divided into positive sequence voltage component, negative sequence voltage component and zero sequence voltage component, the positive sequence voltage component has obtained the output voltage waveforms of balance in the astatic control of passing through the PI controller under the positive sequence rotating coordinate system; The negative sequence voltage component by the astatic control of PI controller, has been eliminated the negative sequence voltage distortion of inverter under unbalanced load under the negative phase-sequence rotating coordinate system.Harmonic component is also done similar processing, restrain the low-order harmonic component of output voltage.After the output stack with above-mentioned PI controller, obtain the controlled quentity controlled variable about inverter voltage, produce corresponding SVPWM waveform, the SVPWM waveform drives six brachium pontis of inverter again through the IGBT drive circuit, can obtain the output voltage of three-phase equilibrium.The unbalanced problem of output voltage has guaranteed the good waveform quality of UPS output voltage when having solved the unbalanced load of UPS band.
Described communication module comprises MCU display control board module and parallel operation communication interface circuit.MCU display control board module adopts P89LPC938 as display control chip, by with the general I/O of the GPIO(of TMS320F2812) the interface inquiry that is connected arranges the running status of current UPS, running status comprises inversion output state, bypass output state, service mode, malfunction.The GPIO(universal I/O port of parallel operation communication interface circuit and TMS320F2812) interface is connected, adopt less order wire, the information of mutual common synchronization signal and output voltage, by judging that the static switch state of a control of other UPS controls the static switch of self, be conducive to parallel operation and the modularization of UPS.In order to prevent disturbing, each signal transmission has all adopted light-coupled isolation.
Described error protection module, it is combined by each detection module.Module is according to input voltage and current detecting, output voltage and current detecting, cell voltage and current detecting, bypass/inversion change detection, judge that faults such as the overvoltage that may occur in service, overcurrent or under-voltage, undercurrent accurately locate, and take appropriate measures: (1) is outputted to mains-supplied when loading on the excessive or surge current of when starting electric current when surpassing limit value with inversion.(2) when inverter generation overvoltage, overload, distortion or fault, automatically switch to mains-supplied.(3) when load normal or inverter recover normal after, can automatically switch to inverter power supply.
Claims (6)
1. based on the UPS Digitizing And Control Unit of TMS320F2812; it is characterized in that comprising that based on 32 bit DSP TMS320F2812 main control modules, genlock control module, three-phase output balance adjustment module, communication module and error protection module described main control module is connected with the error protection module is two-way with genlock control module, three-phase output balance adjustment module, communication module.
2. UPS Digitizing And Control Unit according to claim 1 is characterized in that described DSP main control module comprises preposing signal process circuit, AD sample circuit, space vector pulse width modulation (SVPWM) signal generating circuit, rectifier control circuit and inverter control circuit; The AD sample circuit links to each other with preposing signal process circuit, and the SVPWM signal generating circuit is connected with rectifier control circuit, inverter control circuit respectively, and rectifier control circuit is connected with inverter control circuit.
3. UPS Digitizing And Control Unit according to claim 1 is characterized in that described three-phase output balance adjustment module comprises AD sample circuit, output voltage waveforms control module; The output voltage waveforms control module adopts positive sequence voltage controller and the negative sequence voltage controller based on rotating coordinate transformation.
4. UPS Digitizing And Control Unit according to claim 1 is characterized in that described fault protection system comprises input voltage and current detection circuit, output voltage and current detection circuit, cell voltage and current detection circuit and bypass/inversion commutation circuit.
5. UPS Digitizing And Control Unit according to claim 1 is characterized in that described genlock control module comprises general AD sample circuit, zero cross detection circuit and frequency acquisition unit.
6. according to each described UPS Digitizing And Control Unit of claim 1 ~ 5, it is characterized in that described communication module comprises MCU (microcontroller) display control board module and parallel operation communication interface circuit.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106911195A (en) * | 2015-12-23 | 2017-06-30 | 苏州唐锟辰新能源科技有限公司 | A kind of battery truck with wireless charging device |
| CN108155715A (en) * | 2018-01-24 | 2018-06-12 | 广州科技贸易职业学院 | A kind of three-phase ups power control device based on double-nuclear DSP |
| CN109412260A (en) * | 2018-12-14 | 2019-03-01 | 上海鹰觉科技有限公司 | Naval vessel emergency power supply control device, method and computer readable storage medium |
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| CN203311196U (en) * | 2013-04-28 | 2013-11-27 | 华南理工大学 | UPS digitization control system based on TMS320F2812 |
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| CN203311196U (en) * | 2013-04-28 | 2013-11-27 | 华南理工大学 | UPS digitization control system based on TMS320F2812 |
Non-Patent Citations (2)
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| 余志强: "TMS320F2812 DSP在UPS不间断电源数字控制中的应用", 《国外电子测量技术》 * |
| 谢斐: "空间矢量算法的研究及其在三相UPS数字控制系统的实现", 《华南理工大学说是学位论文》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106911195A (en) * | 2015-12-23 | 2017-06-30 | 苏州唐锟辰新能源科技有限公司 | A kind of battery truck with wireless charging device |
| CN108155715A (en) * | 2018-01-24 | 2018-06-12 | 广州科技贸易职业学院 | A kind of three-phase ups power control device based on double-nuclear DSP |
| CN109412260A (en) * | 2018-12-14 | 2019-03-01 | 上海鹰觉科技有限公司 | Naval vessel emergency power supply control device, method and computer readable storage medium |
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Application publication date: 20130807 |