CN103345543A - Intelligent substation merging unit simulation modeling method - Google Patents
Intelligent substation merging unit simulation modeling method Download PDFInfo
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- CN103345543A CN103345543A CN2013102284291A CN201310228429A CN103345543A CN 103345543 A CN103345543 A CN 103345543A CN 2013102284291 A CN2013102284291 A CN 2013102284291A CN 201310228429 A CN201310228429 A CN 201310228429A CN 103345543 A CN103345543 A CN 103345543A
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Abstract
The invention discloses an intelligent substation merging unit simulation modeling method. The method is conducted on a communication stimulation platform, a data generating module is used for generating sample data, a data processing module receives and processes the sample data, the sample data after being processed are sent to a sampling value message generating module, the sample data are generated to data packets through the sampling value message generating module and then sends the data packets to a protocol packaging module, the protocol packaging module maps the data packets from an application layer to a data link layer and a physical layer to form a bit stream, and eventually a message sending module sends the bit stream to an external device. By the adoption of the method, whole and overall process modeling is conducted on a merging unit, secondary network stimulation accuracy of an intelligent substation is improved, a new thought is further provided for the intelligent substation and even for whole intelligent power grid secondary network stimulation, the practical data processing process and the actual performance of the merging unit can be truly represented, quantitative analysis is conducted, and the protocol packaging module is small in delay and packet processing errors by the adoption of a three-layer protocol analytic model.
Description
Technical field
The present invention relates to the intelligent substation Simulation and Modeling Technology in the power technology field, particularly a kind of intelligent substation merge cells emulation modelling method.
Background technology
Intelligent substation introduces that the process layer network has been realized striding equipment, striden at interval, multi-disciplinary data information sharing, also makes the reliability of automated systems such as relay protection greatly depend on the process layer network simultaneously.At present; owing to lack effective analytical approach and analysis tool; intelligent substation is in " black box " method of operation; and almost be blank at the performance evaluation of application systems such as process layer network and relay protection thereof with the research assessment; cognition for process layer network real-time reliability does not form unified understanding as yet; therefore in order to realize that quantitative simulation analysis becomes very necessary and urgent to the intelligent substation equipment modeling; and merge cells is as connecting primary equipment (such as mutual inductor) and secondary device (such as protective device; measuring apparatus) important bridge; be important message in the secondary network---the sender of sampled value message (SV); when therefore carrying out the intelligent substation network simulation, its modeling that becomes more meticulous is seemed even more important.
But, in existing simulation analysis, some problems: ⑴ below intelligent substation merge cells model exists lacks the modeling to data source production process and IEC618509-1/2 message format, to IEC61850 standard modeling deficiency, lack the detailed modeling of device algorithm and logic, can not truly describe real data processing procedure and the actual performance thereof of merge cells, be difficult to carry out quantitative analysis; ⑵ directly utilize existing seven layer protocol analytic models to replace the merge cells model, and error is bigger aspect time-delay and bag processing.
Summary of the invention
The object of the present invention is to provide a kind of intelligent substation merge cells emulation modelling method, can intactly carry out modeling to the SV of transformer station message information source, provide reference for other secondary device modelings of intelligent substation simultaneously, effectively improve substation secondary network simulation precision, and then be transformer station designs, lectotype selection and operation management provide quantitative test instrument.
Above-mentioned purpose of the present invention realizes by the following technical solutions: a kind of intelligent substation merge cells emulation modelling method, it is characterized in that carrying out at the communication simulation platform, adopt data generating module to generate sampled data, data processing module receives sampled data and handles, sampled data after treatment is sent to sampled value message generation module, by sampled value message generation module sampled data is generated packet and be sent to the protocol encapsulation module, the protocol encapsulation module is mapped to data link layer and Physical layer becomes bit stream with packet from application layer, finally by the message sending module bit stream is sent to external equipment.
The present invention has not only improved the simulation accuracy of intelligent substation secondary network greatly by being combined a whole set of overall process modeling of unit, new approaches is provided also for simultaneously intelligent substation and even the emulation of whole intelligent grid secondary network; Can truly reflect real data processing procedure and the actual performance thereof of merge cells, and carry out quantitative analysis; And the protocol encapsulation module adopts three layer protocol analytic models, utilizes seven layer protocol analytic models to replace the merge cells model to compare with existing, and error is little aspect time-delay and bag processing.
Data generating module of the present invention obtains sampled data by the analytical expression that obtains the sampled point electric parameters, and described data processing module arranges the sampling period of sampled data to satisfy the different sampling rate requirements of secondary device.
Described analytical expression is produced by function generator.Function generator obtains analytical expression, and the sampling period of data need be set, and satisfies the requirement of the different sampling rates of equipment with this.
The present invention obtains the sampled data sequential file of correlated sampling point, and the sampled data sequential file is imported in the data generating module to obtain sampled data.
Sampled data sequential file of the present invention obtains by fault oscillograph or simulation software of electric system (as: PSCAD/EMTDC software).Because when adopting simulation software of fault oscillograph or electric system to import data, itself has distinguished different sampling rates, therefore need not to arrange again the sampling period of sampled data.
Sampled value message generation module of the present invention generates packet according to the IEC618509-1/2 form.
The bandwidth of the external-connected port link of message sending module identification external equipment of the present invention, when initialization powered on, the processing speed of transceiver bandwidth automatic and the external-connected port link was complementary.
Compared with prior art, the present invention has following significant effect:
⑴ the present invention has not only improved the simulation accuracy of intelligent substation secondary network greatly by being combined a whole set of overall process modeling of unit, new approaches is provided also for simultaneously intelligent substation and even the emulation of whole intelligent grid secondary network.
⑵ the present invention has overcome existing merge cells and has lacked modeling to data source production process and IEC618509-1/2 message format, to IEC61850 standard modeling deficiency, the defective that lacks the detailed modeling of device algorithm and logic, real data processing procedure and actual performance thereof that can the actual response merge cells, and carry out quantitative analysis.
⑶ protocol encapsulation module of the present invention adopts three layer protocol analytic models, utilizes seven layer protocol analytic models to compare with existing, and error is little aspect time-delay and bag processing.
Description of drawings
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is merge cells modeling process flow diagram of the present invention;
Fig. 2 is the IEC618509-1/2 message format;
Fig. 3 is IEC618509-2 sampled value message product process figure;
Fig. 4 is merge cells protocol frame figure;
Fig. 5 is the data link layer state machine diagram.
Embodiment
Shown in Fig. 1～5, it is a kind of intelligent substation merge cells of the present invention emulation modelling method, (OPENT) carries out at the communication simulation platform, adopt data generating module to generate sampled data, the mode that sampled data produces in this module is to obtain the analytical expression of sampled point electric parameters by function generator: the three phase short circuit fault with a certain circuit is the example explanation:
Before the fault, the electric current and voltage value of A phase is as follows in this merge cells:
u
a＝E
msin(ωt+α)
i
a＝I
msin(ωt+α-ψ)
In the formula: E
mBe crest voltage; I
mBe peak point current; ω is angular velocity; The initial phase angle of α voltage; ψ is power-factor angle before the fault.
When breaking down, the analytical expression of A phase current is:
In the following formula:
Be angle of impedance (Z wherein
1Be the impedance after the fault, R
1, L
1Be resistance after the fault and inductance).
To needing the substation secondary network of emulation, set up the data model of all merge cellses according to above method with analytical expression, just can form the complete data source of a cover.
Data processing module receives sampled data and handles, and data processing module arranges the sampling period of sampled data to satisfy the different sampling rate requirements of secondary device.Since the process layer network device as: equipment such as protection, metering, failure wave-recording have the demand of different sampling rates to the SV message; should support the modeling demand of multi-sampling rate; therefore; obtain at function generator under the situation of analytical expression; the sampling period of data need be set, and is 80 points/cycle as protecting the sampling SV message cycle, and the cycle of metering outfit is 256 points/cycle; be the resolution sizes of t in the analytical expression, satisfy the requirement of the different sampling rates of equipment with this.
Sampled data after treatment is sent to sampled value message generation module, by sampled value message generation module sampled data is generated packet according to the IEC618509-1/2 form and be sent to the protocol encapsulation module, as shown in Figure 2, OPENT has the transmission mechanism based on bag, therefore, can in the subsidiary packet format editing machine of OPNET, set up data packet format, then by carrying out assignment in the process territory, because the ASDU number is uncertain in the 9-2 message, need to handle through following mode, as shown in Figure 3: in the packet format editing machine, according in the accompanying drawing 2 the message packet format being set up in the description of ASDU and APDU field respectively.According to actual conditions, determine the number ASDU_number of ASDU, carry out the circulation assign operation then, carry out circulation time for the first time, the assignment times N is initialized as 0, judge that at first whether N is less than ASDU_number, when condition is set up, create new ASDU form package definition and be ASDU_N and to each field assignment, the back is carried out once to upgrade to operate ASDU_N is put into APDU form bag as field, the assignment number of times is added 1 handle, and enters judgement again, when N is not less than ASDU_number, set up the IEC61850-9-2 packet format, and create the corresponding format bag, each field of form bag is carried out assignment, wherein with the APDU form bag of treated generation also as the field assignment in IEC61850-9-2 form bag, the form bag is sent to data link layer from application layer the most at last.
The protocol encapsulation module is mapped to data link layer and Physical layer becomes bit stream with packet from application layer.The IEC61850 standard formulation rule of communication of process layer network, can be correct in order to ensure data, arrive the destination timely, in particular communication service mapping (SCSM), defined the processing protocol of packet for to map directly to data link layer and Physical layer from application layer, for meeting corresponding requirements, as shown in Figure 4, the merge cells protocol frame that in the OPNET nodes domains, makes up, above data generating module, the processing procedure of data processing module and these three modules of sampled value message generation module is actually to be finished in application layer, and the protocol encapsulation module is to finish in data link layer and Physical layer, in data link layer, data are that unit sends with the frame, receive and reply, and finish flow control simultaneously, Error Control and link management function, mode with state machine in OPNET realizes, referring to Fig. 5.In Physical layer, be that unit transmits with the bit stream.
Finally by the message sending module bit stream is sent to external equipment.The message sending module mainly is connected with external equipment, be responsible for the bandwidth of identification external-connected port link, when initialization powered on, the processing speed of transceiver bandwidth automatic and the external-connected port link was complementary, and finally finishes message information intercommunication between merge cells and the external equipment.
In other embodiments, obtain the sampled data sequential file of correlated sampling point by fault oscillograph or a simulation software of electric system (as: PSCAD/EMTDC), and the sampled data sequential file imported in the data generating module to obtain sampled data, owing to itself distinguished different sampling rates, therefore need not to arrange again the sampling period of sampled data.Based on the stood full sampled data sequential file of each merge cells of concrete fault oscillograph or simulation software of electric system, import to respectively in the relevant merge cells model by programming, namely import in the data generating module.
By the data acquisition from current transformer and voltage transformer (VT), the data of gathering are handled and packed, carry out modeling to the final overall process that generates IEC618509-1/2 form bag and transmission, real data processing procedure and actual performance thereof that can the actual response merge cells, and carry out quantitative analysis, improved the simulation accuracy of intelligent substation secondary network, new approaches are provided also for simultaneously intelligent substation and even the emulation of whole intelligent grid secondary network.
Embodiments of the present invention are not limited thereto; according to foregoing of the present invention; ordinary skill knowledge and customary means according to this area; do not breaking away under the above-mentioned basic fundamental thought of the present invention prerequisite; the present invention can also make modification, replacement or the change of other various ways, all drops within the rights protection scope of the present invention.
Claims (7)
1. intelligent substation merge cells emulation modelling method, it is characterized in that: carry out at the communication simulation platform, adopt data generating module to generate sampled data, data processing module receives sampled data and handles, sampled data after treatment is sent to sampled value message generation module, by sampled value message generation module sampled data is generated packet and be sent to the protocol encapsulation module, the protocol encapsulation module is mapped to data link layer and Physical layer becomes bit stream with packet from application layer, finally by the message sending module bit stream is sent to external equipment.
2. intelligent substation merge cells emulation modelling method according to claim 1, it is characterized in that: data generating module obtains sampled data by the analytical expression that obtains the sampled point electric parameters, and described data processing module arranges the sampling period of sampled data to satisfy the different sampling rate requirements of secondary device.
3. intelligent substation merge cells emulation modelling method according to claim 2, it is characterized in that: analytical expression is produced by function generator.
4. intelligent substation merge cells emulation modelling method according to claim 1 is characterized in that: obtain the sampled data sequential file of correlated sampling point, and the sampled data sequential file is imported in the data generating module to obtain sampled data.
5. intelligent substation merge cells emulation modelling method according to claim 4 is characterized in that: the sampled data sequential file obtains by fault oscillograph or simulation software of electric system.
6. according to claim 3 or 5 described intelligent substation merge cells emulation modelling methods, it is characterized in that: sampled value message generation module generates packet according to the IEC618509-1/2 form.
7. intelligent substation merge cells emulation modelling method according to claim 6, it is characterized in that: the bandwidth of the external-connected port link of message sending module identification external equipment, when initialization powered on, the processing speed of transceiver bandwidth automatic and the external-connected port link was complementary.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103984795A (en) * | 2014-04-04 | 2014-08-13 | 中国南方电网有限责任公司电网技术研究中心 | IEC (international electro-technical commission) 61850-based on-line partial discharge monitoring equipment communication simulation method |
| CN105721208A (en) * | 2016-02-04 | 2016-06-29 | 国网浙江省电力公司绍兴供电公司 | Intelligent substation process layer network modeling method based on OPNET |
| CN106161139A (en) * | 2016-06-27 | 2016-11-23 | 哈尔滨工业大学 | A kind of intelligent substation SV message simulation generates and detection method |
| CN106533761A (en) * | 2016-11-14 | 2017-03-22 | 广东电网有限责任公司电力科学研究院 | Secondary system plan method based on transformer station information flow analysis |
| CN107122532A (en) * | 2017-04-14 | 2017-09-01 | 国网电力科学研究院武汉南瑞有限责任公司 | The emulation mode and system of intelligence equipment integrating are closed by dispatching formula transformer station |
| CN107818215A (en) * | 2017-10-30 | 2018-03-20 | 国网福建省电力有限公司 | A kind of secondary system of intelligent substation common hardware simulator and method |
| CN111884851A (en) * | 2020-07-27 | 2020-11-03 | 广东工业大学 | Simulation design method for process level equipment of intelligent substation |
| CN111884212A (en) * | 2020-07-27 | 2020-11-03 | 国网经济技术研究院有限公司 | Intelligent substation protection unit simulation system and construction method thereof |
| CN111884211A (en) * | 2020-07-27 | 2020-11-03 | 国网经济技术研究院有限公司 | Joint simulation method and system for primary system and secondary system of intelligent substation |
| CN117614847A (en) * | 2023-11-22 | 2024-02-27 | 广东工业大学 | Simulation method for acquisition execution unit and computer equipment |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103984795A (en) * | 2014-04-04 | 2014-08-13 | 中国南方电网有限责任公司电网技术研究中心 | IEC (international electro-technical commission) 61850-based on-line partial discharge monitoring equipment communication simulation method |
| CN105721208A (en) * | 2016-02-04 | 2016-06-29 | 国网浙江省电力公司绍兴供电公司 | Intelligent substation process layer network modeling method based on OPNET |
| CN106161139A (en) * | 2016-06-27 | 2016-11-23 | 哈尔滨工业大学 | A kind of intelligent substation SV message simulation generates and detection method |
| CN106533761A (en) * | 2016-11-14 | 2017-03-22 | 广东电网有限责任公司电力科学研究院 | Secondary system plan method based on transformer station information flow analysis |
| CN106533761B (en) * | 2016-11-14 | 2019-04-12 | 广东电网有限责任公司电力科学研究院 | A kind of secondary system planning method based on the analysis of substation information flow point |
| CN107122532A (en) * | 2017-04-14 | 2017-09-01 | 国网电力科学研究院武汉南瑞有限责任公司 | The emulation mode and system of intelligence equipment integrating are closed by dispatching formula transformer station |
| CN107818215A (en) * | 2017-10-30 | 2018-03-20 | 国网福建省电力有限公司 | A kind of secondary system of intelligent substation common hardware simulator and method |
| CN111884851A (en) * | 2020-07-27 | 2020-11-03 | 广东工业大学 | Simulation design method for process level equipment of intelligent substation |
| CN111884212A (en) * | 2020-07-27 | 2020-11-03 | 国网经济技术研究院有限公司 | Intelligent substation protection unit simulation system and construction method thereof |
| CN111884211A (en) * | 2020-07-27 | 2020-11-03 | 国网经济技术研究院有限公司 | Joint simulation method and system for primary system and secondary system of intelligent substation |
| CN117614847A (en) * | 2023-11-22 | 2024-02-27 | 广东工业大学 | Simulation method for acquisition execution unit and computer equipment |
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Application publication date: 20131009 |