CN102201180A - Process bus relay protection teaching experiment method based on PC (personal computer) platform - Google Patents
Process bus relay protection teaching experiment method based on PC (personal computer) platform Download PDFInfo
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- CN102201180A CN102201180A CN201110171659XA CN201110171659A CN102201180A CN 102201180 A CN102201180 A CN 102201180A CN 201110171659X A CN201110171659X A CN 201110171659XA CN 201110171659 A CN201110171659 A CN 201110171659A CN 102201180 A CN102201180 A CN 102201180A
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Abstract
The invention relates to a process bus relay protection teaching experiment method based on a PC platform. A process bus relay protection teaching experiment system conforms to the digital substation IEC61850 standard and is based on the PC and a Windows system. The method comprises the steps of: designing a power system model and a fault type on EMTDC/PSCAD software for carrying out dynamic simulation and generating fault data, then outputting the fault data by a C-language interface program, forming an SV message and a GOOSE message according to the IEC 61850 standard, further sending the SV message and the GOOSE message to a protection IED by a process bus according to a network driver interface standard (NDIS). The process bus relay protection teaching experiment method is applicable to a process bus experiment of college relay protection course, can be realized by an ordinary PC, and has the advantages of low cost, high flexibility, high test accuracy, accurate experimental model and the like.
Description
Technical field
The invention belongs to protecting electrical power system, control and automatic field, relate in particular to a kind of process bus relay protection teaching and experiment method based on the PC platform.
Background technology
In electric system, the digital transformer substation of following the IEC61850 standard has become the development trend of current transformer substation construction.In the IEC61850 digital transformer substation, whole transformer station is divided into three layers on substation level, wall and process layer.Wall and process interlayer communication are finished by process bus, and the wall intelligent electronic device, process is laminated and equipment such as unit and intelligent switch, by process bus communication.The a large amount of cables that are used for the transmission of analog signals and switching value signal are traditionally replaced by process bus.
Based on the relay protection of process bus with in real time, network is a core efficiently, analog quantity and switching value information are after merging unit, intelligent switch equipment realization in-situ digitalization, by process bus the data of being gathered are sent to wall intelligent electronic device IED, and receive operational order from wall intelligent electronic device IED; IED such as the relay protection of wall, control, measurement receive sampled data from process bus, carry out that algorithm is judged after process bus to transmit operation orders such as intelligent switchs.
Current, adopt traditional protection tester pattern, the i.e. pattern of host computer+embedded equipment basically based on the relay protection experimental of process bus.Host computer is mainly realized the setting of experimental situation and parameter, the generation of fault data and test process and result's demonstration.Embedded equipment is mainly realized the encapsulation and the transmitting-receiving of fault data.Embedded equipment has served as intermediate link as the tie of host computer and protection intelligent electronic device IED in whole process bus experimental system.Embedded equipment needs all to communicate with host computer and protection intelligent electronic device IED two ends.
Embedded equipment need carry out extra hardware input as intermediate link, has increased the cost of process bus relay protection experimental.Simultaneously, embedded equipment need all communicate with host computer and protection intelligent electronic device IED as intermediate link, and the link that this has just increased the integral experiment system makes total system comparatively complicated, has reduced running efficiency of system.And the exploitation of embedded equipment relates to the research of whole hardware platform and software platform, and the construction cycle is long, the realization difficulty is big, finished product typing back function basic fixed, and flexibility ratio is restricted.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of prior art, a kind of process bus relay protection teaching and experiment method based on the PC platform is provided, reduced hardware cost and improved system effectiveness.
Technical scheme of the present invention is: a kind of process bus relay protection teaching and experiment method based on the PC platform; based on the PC platform; function by EMTDC/PSCAD analogue simulation merge cells MU and intelligent switch; realization is based on generation, encapsulation and the transmission of the power system network message of IEC61850 standard; and through NDIS NDIS transmission and reception message; the process bus that forms closed loop with protection intelligent electronic device IED is tested, and the process bus experimental technique may further comprise the steps:
(1) operation Windows system on PC, by the model bank that EMTDC/PSCAD software provides, design electric power system model and simulation electric power system fault type;
(2) carry out dynamic simulation and generate the Operation of Electric Systems failure message, failure message is exported the row format conversion of going forward side by side by the C language interface from EMTDC/PSCAD, carry out SV message or the encapsulation of GOOSE message ethernet frame according to the IEC61850 communication standard then;
(3), packaged SV message and GOOSE message are sent to protection intelligent electronic device IED through the process bus by NDIS NDIS;
(4) receive self-shield intelligent electronic device IED to comprise fault distinguishing result's GOOSE message, intelligent switch closes, breaks and order in the extraction GOOSE message, and is delivered to EMTDC/PSCAD, makes its intelligent switch modeling make and break operation.
By service condition and the parameter that electric power system model and fault type are set, realize the experimental project requirement of digital transformer substation wall protection intelligent electronic device IED.
Step (2) Operation of Electric Systems failure message comprises electric parameters fault data and switching value fault data, and the Operation of Electric Systems failure message generates with document form.
The sampling rate of electric parameters fault data dynamic simulation and the sampling rate of merge cells MU are consistent, at EMTDC/PSCAD required simulation step length is set, and by the required electric information of EMTDC/PSCAD software oscillograph function record, to generate corresponding electric current, voltage data.
Above-mentioned C language interface need be compiled into obj file (* .o) with interface source code (* .c) through the tool software GCC that EMTDC/PSCAD provides, and calls for EMTDC/PSCAD again.
Above-mentioned SV message or GOOSE message adopt the asn.1 codec to encode earlier, and then encapsulate by ethernet frame format.
Realize and network interface unit real-time sending and receiving GOOSE message and SV message by NDIS NDIS.
Protection intelligent electronic device IED protects logic determines, and judged result is sent on the process bus with GOOSE message form after receiving the message that comprises the electric power system fault data.
Resolve the GOOSE frame ordering that receives by the ASN.1 codec, and these are ordered by passing to the intelligent switch model with the EMTDC/PSCAD interface, finish the closed operation of closing of intelligent switch.
Compared with prior art the invention has the beneficial effects as follows: (1) the inventive method good economy performance; the inventive method is based on PC platform and Windows system; need not special relay-protection tester and participate in, especially be fit to construction the college course experimental system of financial cost sensitivity.(2) the inventive method dirigibility height, experimental system can be simulated functions such as merge cells and intelligent switch flexibly, the Ethernet interface implementation procedure bus that experimental system can directly all have by PC, or dispose implementation procedure buses such as electrical to optical converter as required, have dirigibility.(3) the inventive method precision height, test macro can conveniently be realized primary system model and various fault and Exception Type by means of EMTDC/PSCAD software, system model and emulated data precision height.
Description of drawings
Fig. 1 is the process bus relay protection teaching and experiment method schematic flow sheet that the present invention is based on the PC platform.
Embodiment
Below the specific embodiment of the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1; a kind of process bus relay protection teaching and experiment method of the present invention based on the PC platform; based on the PC platform; function by EMTDC/PSCAD analogue simulation merge cells MU and intelligent switch; realization is based on generation, encapsulation and the transmission of the power system network message of IEC61850 standard; and through NDIS NDIS transmission and reception message; the process bus that forms closed loop with protection intelligent electronic device IED is tested; it is characterized in that the process bus experimental technique may further comprise the steps:
(1) operation Windows system on PC, by the model bank that EMTDC/PSCAD software provides, design electric power system model and simulation electric power system fault type;
(2) carry out dynamic simulation and generate the Operation of Electric Systems failure message, failure message is exported the row format conversion of going forward side by side by the C language interface from EMTDC/PSCAD, carry out SV message or the encapsulation of GOOSE message ethernet frame according to the IEC61850 communication standard then;
(3), packaged SV message and GOOSE message are sent to protection intelligent electronic device IED through the process bus by NDIS NDIS;
(4) receive self-shield intelligent electronic device IED to comprise fault distinguishing result's GOOSE message, extract the order of closing, break of intelligent switch in the GOOSE message, and be delivered to EMTDC/PSCAD, make the operation of intelligent switch modeling make and break.
Operation Windows system by EMTDC/PSCAD software graphical operation interface, utilizes the component models storehouse to set up realistic model according to the electric system actual conditions easily on PC.According to process layer of digitalization transformer substation bus relay protection experimental project demand; design electric system transition resistance, object of protection (circuit, transformer, bus etc.), fault type (three-phase fault, single-phase fault, phase-to phase fault etc.) and unusual parameter and models such as (vibration, CT/PT broken strings etc.) generate the Operation of Electric Systems failure message with document form.The Operation of Electric Systems failure message comprises electric parameters fault data and switching value fault data.The dynamic simulation sampling rate of electric parameters fault data and the sampling rate of merge cells MU are consistent, at EMTDC/PSCAD required simulation step length is set, by the required electric information of EMTDC/PSCAD software oscillograph function record, to generate corresponding electric current, voltage data.
The switching value fault data is generated by the control to intelligent switch by the interface function of C language compilation.The control function of intelligent switch realizes that by the intelligent switch interface function that embeds the C language compilation in original electric power system model the specific implementation method is:
(1) the C language source code of establishment intelligent switch control function.For energy and the smooth interface of PSCAD/EMTDC program, following header file nd.h, emstor.h, s0.h, s1.h, s2.h, branches.h, emtconst.h, fnames.h should be included in the C language source code.
(2) the tool software GCC that utilizes EMTDC to provide is compiled into obj file (* .o) with interface source code (* .c).
(3) click right is selected Properties=＞Fortran in the page, compiled obj file (* .o) is added right button " Properties=＞Build Options=＞Additional.objand.lib files " in the page-in, finish being connected of C language intelligence switching function control interface and PSCAD/EMTDC.
The electrical data that EMTDC/PSCAD generates, at first the interface function by the C language compilation carries out data output and type conversion, carries out the encapsulation of SV message according to the IEC61850 standard then.Be implemented as follows:
(1) electrical data is a STORF full mold variable in PSCAD/EMTDC, exports and be converted to sixteen bit signless integer type variable (IEC618509-1 standard-required) or 32 floating type variablees (IEC618509-2 standard-required) by C language interface function;
(2) if adopt the IEC618509-1 standard, then the electrical data that converts sixteen bit signless integer type variable to, be filled into the position of the corresponding magnitude of current, voltage in the IEC618509-1 frame, thereby form the electric current and the voltage data of one group of time unanimity; And then these data are formed the conventional data collection ASDU meet the IEC60044-8 code requirement by the IEC618509-1 standard, and then add and go up ethernet type PDU, right of priority mark and mac header and form the SV message;
If adopt the IEC618509-2 standard, at first defer to the syntax rule of ISO 8824 standard A SN.1, Application Protocol Data Unit APDU to the SV message carries out the ASN.1 definition, utilize instrument ASN1C that the ASN.1 definition of SV message APDU is converted to the description of C language construction again, and utilize the APDU structure of C language description and ASN.1 tool storage room to be linked, generate the ASN.1 encoder, utilize the scrambler that generates that the example value of SV message APDU is carried out binary coding then, add the ethernet type PDU that goes up 10byte according to the IEC618509-2 standard at last, the mac header of 4byte right of priority mark and 12byte is formed complete SV message.
The on off state data that EMTDC/PSCAD generates, at first the interface function by the C language compilation carries out data output and type conversion, carries out the encapsulation of GOOSE message according to the IEC61850 standard then.Be implemented as follows:
(1) the on off state data are STORL logical type variable in PSCAD/EMTDC, are converted to the Boolean type that meets the requirement of IEC61850GOOSE frame by the output of C language interface function;
(2) according to IEC61850GOOSE message standard-required, defer to the syntax rule of ISO 8824 standard A SN.1, Application Protocol Data Unit APDU to the GOOSE message carries out the ASN.1 definition, utilize instrument ASN1C that the ASN.1 definition of GOOSE message APDU is converted to the description of C language construction again, and utilize the APDU structure of C language description and ASN.1 tool storage room to be linked, generate the ASN.1 encoder, utilize the scrambler that generates that the example value of GOOSE message APDU is carried out binary coding then, add the ethernet type PDU that goes up 10byte at last, the mac header of 4byte right of priority mark and 12byte is formed complete GOOSE message.
SV message or GOOSE message that application layer is packaged send on the process bus by NDIS NDIS, and IED receives for the protection intelligent electronic device.Be implemented as follows:
(1) registration drives and initialization: at first call NdisMinitializeWrapper function registration Miniport equipment, obtain the equipment handle, utilize the equipment handle that obtains to call NdisIMRegister LayeredMiniport function again, registration MiniportXxx power function is the interface that the upper-layer protocol driver provides to be opened to, call the NdisRegisterProtocol function then, registration ProtocolXxx power function is the interface that bottom Miniport driver provides to be opened to, and will itself be tied on the bsp driver, call the NdisIMAssociateMiniport function at last and notify the NDIS storehouse this be a NDIS intermediate driver.So both the MiniportXxx for bottom provided ProtocolXxx interface, and the ProtocolXxx for the upper strata provides MiniportXxx interface again.After the initialization, the middle layer drives provides miniport and protocol interface to come to combine with the protocol-driven protocol of protocol layer and the network interface card driving miniport of Physical layer.
(2) by the protocol interface application layer packaged SV message or GOOSE message are sent to the driving of NDIS middle layer from protocol-driven protocol, drive the processing back through the NDIS middle layer then and send to network interface card driving miniport, by MiniportSend and Miniportsendpackets function SV message or GOOSE message are sent on the process bus through network adapter at last by the miniport interface.
Protection intelligent electronic device IED receives the SV message that comprises electrical data and the GOOSE message that comprises the intelligent switch state from process bus; analytic message extracts relevant information; protect logic determines by the protection algorithm, and the protection control command is sent on the process layer bus with GOOSE message form.PC is the function of simulated intelligence switch simultaneously; receive the GOOSE message of self-shield intelligent electronic device IED by Window NDIS NDIS; utilize the ASN.1 demoder that the GOOSE message is decoded; obtain intelligent switch and close, divide order; simultaneously intelligent switch is closed, divides order to pass to the intelligent switch model, finish the closing of intelligent switch, closed operation by the C language interface that is connected with EMTDC/PSCAD.
Just can realize the present invention preferably as mentioned above.
Claims (9)
1. process bus relay protection teaching and experiment method based on the PC platform; based on the PC platform; function by EMTDC/PSCAD analogue simulation merge cells MU and intelligent switch; realization is based on generation, encapsulation and the transmission of the power system network message of IEC61850 standard; and through NDIS NDIS transmission and reception message; the process bus that forms closed loop with protection intelligent electronic device IED is tested, and it is characterized in that the process bus experimental technique may further comprise the steps:
(1) operation Windows system on PC, by the model bank that EMTDC/PSCAD software provides, design electric power system model and simulation electric power system fault type;
(2) carry out dynamic simulation and generate the Operation of Electric Systems failure message, failure message is exported the row format conversion of going forward side by side by the C language interface from EMTDC/PSCAD, carry out SV message or the encapsulation of GOOSE message ethernet frame according to the IEC61850 communication standard then;
(3), packaged SV message and GOOSE message are sent to protection intelligent electronic device IED through the process bus by NDIS NDIS;
(4) receive self-shield intelligent electronic device IED to comprise fault distinguishing result's GOOSE message, intelligent switch closes, breaks and order in the extraction GOOSE message, and is delivered to EMTDC/PSCAD, makes its intelligent switch modeling make and break operation.
2. the process bus relay protection teaching and experiment method based on the PC platform according to claim 1; it is characterized in that:, realize the experimental project requirement of digital transformer substation wall protection intelligent electronic device IED by service condition and the parameter that electric power system model and fault type are set.
3. the process bus relay protection teaching and experiment method based on the PC platform according to claim 1; it is characterized in that: step (2) Operation of Electric Systems failure message comprises electric parameters fault data and switching value fault data, and the Operation of Electric Systems failure message generates with document form.
4. the process bus relay protection teaching and experiment method based on the PC platform according to claim 3; it is characterized in that: the sampling rate of electric parameters fault data dynamic simulation and the sampling rate of merge cells MU are consistent; at EMTDC/PSCAD required simulation step length is set; and by the required electric information of EMTDC/PSCAD software oscillograph function record, to generate corresponding electric current, voltage data.
5. the process bus relay protection teaching and experiment method based on the PC platform according to claim 1; it is characterized in that: the C language interface need become the obj file with the interface compilation of source code through the tool software GCC that EMTDC/PSCAD provides, and calls for EMTDC/PSCAD again.
6. the process bus relay protection teaching and experiment method based on the PC platform according to claim 1 is characterized in that: SV message or GOOSE message adopt the ASN.1 codec to encode earlier, and then encapsulate by ethernet frame format.
7. the process bus relay protection teaching and experiment method based on the PC platform according to claim 1 is characterized in that: realize and network interface unit real-time sending and receiving GOOSE message and SV message by NDIS NDIS.
8. the process bus relay protection teaching and experiment method based on the PC platform according to claim 1; it is characterized in that: protection intelligent electronic device IED is after receiving the message that comprises the electric power system fault data; protect logic determines, and judged result is sent on the process bus with GOOSE message form.
9. the process bus relay protection teaching and experiment method based on the PC platform according to claim 1; it is characterized in that: resolve the GOOSE frame ordering that receives by the ASN.1 codec; and with these orders by passing to the intelligent switch model with the EMTDC/PSCAD interface, finish the closing of intelligent switch, closed operation.
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| CN104767662A (en) * | 2015-03-13 | 2015-07-08 | 华南理工大学 | Virtual process bus testing system and method |
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| CN105785793A (en) * | 2016-03-04 | 2016-07-20 | 济南大学 | Digital protection source code level closed-loop simulation method based on PSCAD |
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| CN113327471A (en) * | 2021-05-17 | 2021-08-31 | 国家电网有限公司 | Relay protection tripping circuit troubleshooting training device and method |
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