CN104037941A - Control protection system for flexible direct-current power transmission system - Google Patents
Control protection system for flexible direct-current power transmission system Download PDFInfo
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- CN104037941A CN104037941A CN201410247626.2A CN201410247626A CN104037941A CN 104037941 A CN104037941 A CN 104037941A CN 201410247626 A CN201410247626 A CN 201410247626A CN 104037941 A CN104037941 A CN 104037941A
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- programmable logic
- power transmission
- transmission system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/40—Display of information, e.g. of data or controls
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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Abstract
The invention relates to a control protection system for a flexible direct-current power transmission system. The control protection system comprises a programmable logic device array, wherein the input interface of the programmable logic device is connected with the output end of an analogue-digital conversion module, and the analogue-digital conversion module is controlled to sample the voltage and the current of the flexible direct-current power transmission system, carrying out operation processing on the received sampling data to generate the control signal of each switch device; a complex programmable logic device is connected with the programmable logic device array, and the programmable logic device array is used for outputting the control signals of the switch devices to the complex programmable logic device; a central processor carries out information interaction with the programmable logic device array, and is used for carrying out logical operation according to the sampling data transmitted by the programmable logic device array, and the direct-current voltage and running state data of each power module, so as to generate an output command; the central processor is connected with an input-output module and a communication module respectively, and the communication module is further connected with a display screen. The control protection system disclosed by the invention can be widely applied in the field of power electronic converters.
Description
Technical field
The present invention relates to a kind of electronic power convertor field, particularly about a kind of control protection system that is applicable to the flexible DC power transmission system of major loop framework based on modular multilevel (MMC) method.
Background technology
The control protection system of flexible DC power transmission system, its main task is for semiconductor power electronic switching device generation in major loop is opened, cut-off signals, thereby obtains output voltage or the electric current of needs.In addition control protection system and also should be able to monitor the operating state of flexible DC power transmission system, show, record operational factor, telecommunication and troubleshooting etc.In the past few decades; various control technologys have been developed; the hardware circuit of controlling protection system also has the initial analog circuit with discrete component to control, and develops into gradually the full-digital control protection system based on special-purpose and universal integrated circuit chip microprocessor (microprocessor), microcontroller (microcontroller) and digital signal processor DSP (Digital Signal Processor).
Along with the capacity requirement of flexible DC power transmission system constantly strengthens, the flexible DC power transmission system of major loop framework based on modular multilevel (MMC) technology can meet the demand of flexible DC power transmission power system capacity expansion just.But the application along with the flexible DC power transmission system of major loop framework based on modular multilevel technology; need the semiconductor power electronic switching device of controlling just to get more and more; this centralized control protection system before just requiring improves its operational capability and disposal ability, pwm signal output, analog acquisition that a large amount of interfaces miscellaneous meet power electronic device in flexible DC power transmission system can be provided, open monitoring into state, output control, remote communication interface etc.So only centralized control protection system often can not meet the demands and autgmentability is low, reliability is low.
Summary of the invention
For the problems referred to above; the control protection system that the object of this invention is to provide a kind of flexible DC power transmission system; this system adopts distributed control structure; give full play to the function of FPGA+CPLD; contain abundant external interface and extensive programmable logic cells; be conducive to the expansion of the flexible DC power transmission system of major loop framework based on modular multilevel (MMC) method, extensibility and reliability are higher.
For achieving the above object, the present invention takes following technical scheme: a kind of control protection system of flexible DC power transmission system, is characterized in that: it comprises a programmable logic device array, an analog-to-digital conversion module, several CPLDs, a central processing unit, an input and output module, a communication module and a display screen; The input interface of described programmable logic device array connects the output of described analog-to-digital conversion module by parallel bus, described in described programmable logic device antenna array control, analog-to-digital conversion module is sampled to flexible DC power transmission system input voltage, input current, output voltage, output current analog quantity, described programmable logic device array is to the ADC sampled data calculation process receiving, and what generate each electronic power switch device in flexible DC power transmission system opens signal, cut-off signals, pwm control signal; Described in each, CPLD is connected with described programmable logic device array by a pair of optical fiber, direct voltage amount and the running status of each power model in the described programmable logic device array received flexible DC power transmission system that CPLD gathers described in each; Described programmable logic device array exports described signal, cut-off signals and the pwm control signal opened to described in each CPLD, by described CPLD, the opening of electronic power switch device in each power model, shutoff, PWM is controlled; Described central processing unit carries out information interaction by data/address bus and described programmable logic device array, and described central processing unit is to described programmable logic device array transmission of control signals; Each power model direct voltage amount and the running state data of the ADC sampled data that described central processing unit transfers to according to described programmable logic device array and CPLD collection described in each are carried out logical operation, generate and output order; Described central processing unit adopts CAN bus to connect respectively described input and output module and communication module, by opening into state of electronic power switch device in input/output switching and each power model in described input and output module collection flexible DC power transmission system, and carry out and output accordingly order; By described communication module, realize flexible DC power transmission system failure data record ripple, described communication module also connects described display screen.
Input/output switching in described flexible DC power transmission system and the electronic power switch device of each power model are disconnecting link or controlled circuit breaker.
Described programmable logic device array carries out the expansion of optical fiber interface according to the expansion of power model number in described flexible DC power transmission system, and described CPLD is expanded according to the demand of described power model number.
Described central processing unit comprises arithmetic and logic unit, register parts and control assembly, controls the conservation treatment unit of protection system as described flexible DC power transmission system, realizes and comprises that operation of analog quantity is processed, protection logical process function.
Described communication module provide RS485, ethernet communication mouth, GPS to time interface.
The present invention is owing to taking above technical scheme, it has the following advantages: 1, the present invention is owing to adopting distributed control protection system, central processing unit+programmable logic device array is controlled the master control part of protection system as flexible DC power transmission system, can expand CPLD 3 and as flexible DC power transmission system, control the performance element of protection system; Analog acquisition, data operation processing, pwm signal output function are partly placed on to FPGA; defencive function is placed on CPU; sub-module sampling control function is placed on CPLD, and interface section comprises that collection monitoring management, communication interface, the man-machine interface of input and output signal are completed by input and output module and communication module respectively.Give full play to the function of FPGA+CPLD, have abundant external interface and extensive programmable logic cells, be conducive to the expansion of flexible DC power transmission system, extensibility and reliability are higher.2, the present invention is owing to adopting FPGA, and it is the product further developing on the basis of the programming devices such as PAL, GAL, CPLD.It occurs as a kind of semi-custom circuit in application-specific integrated circuit (ASIC) field, has both solved the deficiency of custom circuit, has overcome again the limited shortcoming of original programming device gate circuit number.The present invention controls protection system core devices using FPGA as flexible DC power transmission system, FPGA advantage is to comprise abundant outside programmable interface, and extended capability is strong, and internal processes operation adopts the mode of parallel processing, and real-time is high.Collection calculation process, the pwm signal modulation that realizes analog signal exported, the expansion of optical-fibre channel, and FPGA manages the CPLD of each power model.CPLD has flexible in programming, integrated level is high, the cycle of designing and developing is short, the scope of application is wide, developing instrument is advanced, the features such as design and manufacture cost is low, be suitable as very much the process chip of the performance element of module, adopting optical fiber to carry out communication with FPGA is connected, according to the requirement of electronic power switch device, carry out dead area compensation downwards, minimum pulse width design, control its switch, upwards gather the temperature of electronic power switch device, the analog quantity information of each module sends to FPGA through optical fiber serial ports, and the fault-signal of timely responding to switch device, greatly guaranteed electronic power switch device safety.3, the present invention, due to the front-end processing part and the analog-digital chip that adopt ADC as analog acquisition, is connected with parallel bus with FPGA, has greatly improved the speed of data sampling.In sum, the present invention can extensively apply in electronic power convertor field.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is the flexible DC power transmission system configuration schematic diagram of major loop framework based on modular multilevel in the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1; the invention provides a kind of control protection system that is applicable to the flexible DC power transmission system of major loop framework based on modular multilevel (MMC) method; in flexible DC power transmission system, each brachium pontis is formed by a plurality of power module cascade connections, and power model generally adopts half H bridge construction.The control protection system of flexible DC power transmission system comprises a programmable logic device array (FPGA) 1, an analog-to-digital conversion module (ADC) 2, several CPLDs (CPLD) 3, a central processing unit (CPU) 4, an input and output module 5, a communication module 6 and a display screen 7.
The input interface of programmable logic device array 1 connects the output of analog-to-digital conversion module 2 by parallel bus, by FPGA1, controlling ADC2 samples to flexible DC power transmission system input voltage, input current, output voltage, output current analog quantity, FPGA1 is to the ADC sampled data calculation process receiving, and what generate each electronic power switch device in flexible DC power transmission system opens signal, cut-off signals, pwm control signal.
Each CPLD 3 is connected with programmable logic device array 1 by a pair of optical fiber, realizes information interaction.Direct voltage amount and the running status of each power model in the flexible DC power transmission system that each CPLD 3 of programmable logic device array 1 reception gathers, wherein running status comprises running status and the temperature information of electronic power switch device in each power model.Programmable logic device array 1 will be opened signal, cut-off signals and pwm control signal and export each CPLD 3 to, by CPLD 3, be realized the opening of electronic power switch device in each power model, shutoff, PWM are controlled.
Central processing unit 4 carries out information interaction by data/address bus and programmable logic device array 1, and central processing unit 4, to programmable logic device array 1 transmission of control signals, is controlled 1 work of programmable logic device array; In the flexible DC power transmission system that the ADC sampled data that central processing unit 4 transfers to according to FPGA1 and each CPLD3 gather, the direct voltage amount of each power model and running state data are carried out logical operation and are realized defencive function, generate and output order; Central processing unit 4 adopts CAN bus to connect respectively input and output module 5 and communication module 6, CPU4 opens into state by electronic power switch device in input/output switching and each power model in input and output module 5 collection flexible DC power transmission systems, and carries out and output accordingly order; CPU4 realizes flexible DC power transmission system failure data record ripple by communication module 6, and by communication module 6 provide RS485, ethernet communication mouth, GPS to time interface, communication module 6 also connects display screen 7, realizes the real-time demonstration to flexible DC power transmission system running state.
In above-described embodiment, the electronic power switch device of input/output switching and each power model is disconnecting link or controlled circuit breaker.
In the various embodiments described above, programmable logic device array 1 carries out the expansion of optical fiber interface according to the expansion of power model number in flexible DC power transmission system, and corresponding CPLD 3 is expanded according to the demand of power model number.
In the various embodiments described above, central processing unit 4 comprises arithmetic and logic unit, register parts and control assembly, controls the conservation treatment unit of protection system as flexible DC power transmission system, realizes and comprises that operation of analog quantity is processed, protection logical process function.
In sum, in use, front-end processing part and analog-digital chip owing to adopting ADC2 as analog acquisition, be connected with parallel bus with FPGA1, improved the speed of data sampling in the present invention.The state acquisition and the execution function of outputing order of by input and output module 5, realizing the switching device of flexible DC power transmission internal system, be connected with adopting CAN bus between CPU4, realized the infinite expanding of input and output module 5.Between communication module 6 and CPU4, adopt CAN bus to be connected, realize the expanded function of fault recorder data, communication interface and drive display screen 7, man-machine interface is provided, man-machine interface can show the real-time running state of flexible DC power transmission system.FPGA1 carries out analog acquisition, and gather the power model information of sending on CPLD3, the operation DC voltage value that comprises each power model, the temperature of each power model power electronic device, fault be information whether, carry out the computing of Parallel ADC analog sampled data, generate the opening of electronic power switch device of each power model, the data of cut-off signals; After the collection of FPGA1 timing simulation amount and do Primary Stage Data and process, give CPU4 protect logical calculated by data, CPU4 carries out relevant logical operation and realizes defencive function, guarantees the reliability service of whole flexible DC power transmission system.
Embodiment: as shown in Figure 2, the present embodiment provides the flexible DC power transmission system architecture diagram of major loop framework based on modular multilevel method, the present invention is the control protection system part of this flexible DC power transmission system.In Fig. 2, comprised three-phase loop one-sided in flexible DC power transmission system, every phase loop comprises upper and lower two brachium pontis, each brachium pontis comprises four power models, power model number can be adjusted 1～N according to the actual requirements, CPLD can do corresponding configuration according to power model number, and wherein each power model need configure its CPLD3.Wherein each power model is IGBT switching device; control FPGA1 in protection system and gather total voltage, the current signal in flexible DC power transmission system; through operational analysis, generate pwm signal and through optical fiber, deliver to the CPLD3 of each power model; the CPLD3 of power model carries out instruction and the pwm signal that FPGA1 issues; controlling the switching device of each power model opens or turn-offs; monitor the running status of self power model switching device; gather the voltage signal of power model, adopt on optical fiber and deliver to FPGA1.
The various embodiments described above are only for illustrating the present invention; the connection of each parts and structure all can change to some extent; on the basis of technical solution of the present invention; all improvement and equivalents of the connection of indivedual parts and structure being carried out according to the principle of the invention, all should not get rid of outside protection scope of the present invention.
Claims (7)
1. a control protection system for flexible DC power transmission system, is characterized in that: it comprises a programmable logic device array, an analog-to-digital conversion module, several CPLDs, a central processing unit, an input and output module, a communication module and a display screen;
The input interface of described programmable logic device array connects the output of described analog-to-digital conversion module by parallel bus, described in described programmable logic device antenna array control, analog-to-digital conversion module is sampled to flexible DC power transmission system input voltage, input current, output voltage, output current analog quantity, described programmable logic device array is to the ADC sampled data calculation process receiving, and what generate each electronic power switch device in flexible DC power transmission system opens signal, cut-off signals, pwm control signal;
Described in each, CPLD is connected with described programmable logic device array by a pair of optical fiber, direct voltage amount and the running status of each power model in the described programmable logic device array received flexible DC power transmission system that CPLD gathers described in each; Described programmable logic device array exports described signal, cut-off signals and the pwm control signal opened to described in each CPLD, by described CPLD, the opening of electronic power switch device in each power model, shutoff, PWM is controlled;
Described central processing unit carries out information interaction by data/address bus and described programmable logic device array, and described central processing unit is to described programmable logic device array transmission of control signals; Each power model direct voltage amount and the running state data of the ADC sampled data that described central processing unit transfers to according to described programmable logic device array and CPLD collection described in each are carried out logical operation, generate and output order; Described central processing unit adopts CAN bus to connect respectively described input and output module and communication module, by opening into state of electronic power switch device in input/output switching and each power model in described input and output module collection flexible DC power transmission system, and carry out and output accordingly order; By described communication module, realize flexible DC power transmission system failure data record ripple, described communication module also connects described display screen.
2. the control protection system of a kind of flexible DC power transmission system as claimed in claim 1, is characterized in that: the input/output switching in described flexible DC power transmission system and the electronic power switch device of each power model are disconnecting link or controlled circuit breaker.
3. the control protection system of a kind of flexible DC power transmission system as claimed in claim 1; it is characterized in that: described programmable logic device array carries out the expansion of optical fiber interface according to the expansion of power model number in described flexible DC power transmission system, and described CPLD is expanded according to the demand of described power model number.
4. the control protection system of a kind of flexible DC power transmission system as claimed in claim 2; it is characterized in that: described programmable logic device array carries out the expansion of optical fiber interface according to the expansion of power model number in described flexible DC power transmission system, and described CPLD is expanded according to the demand of described power model number.
5. the control protection system of a kind of flexible DC power transmission system as claimed in claim 1 or 2 or 3 or 4; it is characterized in that: described central processing unit comprises arithmetic and logic unit, register parts and control assembly; as described flexible DC power transmission system, control the conservation treatment unit of protection system, realize and comprise that operation of analog quantity is processed, protection logical process function.
6. the control protection system of a kind of flexible DC power transmission system as claimed in claim 1 or 2 or 3 or 4, is characterized in that: described communication module provide RS485, ethernet communication mouth, GPS to time interface.
7. the control protection system of a kind of flexible DC power transmission system as claimed in claim 5, is characterized in that: described communication module provide RS485, ethernet communication mouth, GPS to time interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410247626.2A CN104037941A (en) | 2014-06-05 | 2014-06-05 | Control protection system for flexible direct-current power transmission system |
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| CN201410247626.2A CN104037941A (en) | 2014-06-05 | 2014-06-05 | Control protection system for flexible direct-current power transmission system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105068961A (en) * | 2015-09-11 | 2015-11-18 | 上海斐讯数据通信技术有限公司 | Ethernet interface management circuit |
| CN106169810A (en) * | 2015-12-31 | 2016-11-30 | 国网山东省电力公司胶州市供电公司 | A kind of distribution transformer intelligent checking system based on Radio Transmission Technology |
| CN107037288A (en) * | 2017-04-28 | 2017-08-11 | 南京南瑞继保电气有限公司 | A kind of damping module test system and method for testing |
| CN107918093A (en) * | 2016-10-08 | 2018-04-17 | 南京南瑞继保电气有限公司 | A kind of flexible direct current damping module test device |
| CN108255106A (en) * | 2018-01-18 | 2018-07-06 | 南方电网科学研究院有限责任公司 | High-speed communication centralized control unit and method for secondary equipment of high-voltage direct-current circuit breaker |
| CN111585243A (en) * | 2019-06-28 | 2020-08-25 | 杭州德睿达电气有限公司 | Feeder protection device of subway direct current traction power supply system |
| CN112531625A (en) * | 2019-09-18 | 2021-03-19 | 西安许继电力电子技术有限公司 | Control protection system of alternating current excitation device |
| WO2023097505A1 (en) * | 2021-11-30 | 2023-06-08 | 西门子（中国）有限公司 | Parallel power electronic converter communication system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105068961A (en) * | 2015-09-11 | 2015-11-18 | 上海斐讯数据通信技术有限公司 | Ethernet interface management circuit |
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| CN106169810A (en) * | 2015-12-31 | 2016-11-30 | 国网山东省电力公司胶州市供电公司 | A kind of distribution transformer intelligent checking system based on Radio Transmission Technology |
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| CN107037288A (en) * | 2017-04-28 | 2017-08-11 | 南京南瑞继保电气有限公司 | A kind of damping module test system and method for testing |
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| CN108255106A (en) * | 2018-01-18 | 2018-07-06 | 南方电网科学研究院有限责任公司 | High-speed communication centralized control unit and method for secondary equipment of high-voltage direct-current circuit breaker |
| CN111585243A (en) * | 2019-06-28 | 2020-08-25 | 杭州德睿达电气有限公司 | Feeder protection device of subway direct current traction power supply system |
| CN112531625A (en) * | 2019-09-18 | 2021-03-19 | 西安许继电力电子技术有限公司 | Control protection system of alternating current excitation device |
| CN112531625B (en) * | 2019-09-18 | 2023-04-18 | 西安许继电力电子技术有限公司 | Control protection system of alternating current excitation device |
| WO2023097505A1 (en) * | 2021-11-30 | 2023-06-08 | 西门子（中国）有限公司 | Parallel power electronic converter communication system |
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Application publication date: 20140910 |