CN102750416A - Topological subnetting method of electromagnetic transient simulation containing switching characteristic circuit - Google Patents
Topological subnetting method of electromagnetic transient simulation containing switching characteristic circuit Download PDFInfo
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- CN102750416A CN102750416A CN201210209329XA CN201210209329A CN102750416A CN 102750416 A CN102750416 A CN 102750416A CN 201210209329X A CN201210209329X A CN 201210209329XA CN 201210209329 A CN201210209329 A CN 201210209329A CN 102750416 A CN102750416 A CN 102750416A
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Abstract
The invention relates to a topological subnetting method, in particular to a topological subnetting method of electromagnetic transient simulation containing a switching characteristic circuit. The method comprises the following steps that A, a target electric system is divided into two parts including a switching subnetwork and an electromagnetic subnetwork; B, the switching subnetwork and the electromagnetic subnetwork are respectively calculated in one electromagnetic step; C, the switching subnetwork and the electromagnetic subnetwork carry out data exchange; and D, next step electromagnetic transient calculation is carried out on the switching subnetwork and the electromagnetic subnetwork. The method has the advantages that an electric electronic switching network is designed into an independent electromagnetic network, the network scale is small, during the off-line/real-time switching calculation, only the subnetwork is subjected to iteration or interpolation calculation, other parts of the network do not participate in the iteration or interpolation calculation, the program modification on the electromagnetic network is reduced to the minimum, only few element models relevant to the electric electronic switch are modified, the switching calculation precision can also be ensured to the greatest degree, and in addition, the workload of the electromagnetic transient program parallelization calculation modification is favorably reduced.
Description
Technical field
The present invention relates to a kind of topology and divide network method, be specifically related to a kind of topology that contains the electromagnetic transient simulation of switching characteristic circuit and divide network method.
Background technology
Time-domain-simulation has become the important tool of Power System Analysis, design and research; Widespread use along with Power Electronic Technique; Flexible AC transmission, D.C. high voltage transmission and distributed power generation are in each link of interior electric system; Particularly a large amount of renewable energy power generation equipment generally all need could insert in the electrical network through electronic power convertor; And this network topology structure that constantly changes in time in essence of electronic power switch has proposed new requirement and challenge to traditional electric system time-domain-simulation, and especially how the real-time simulation aspect of electro-magnetic transient is guaranteed under the prerequisite of calculating real-time property; Calculating the electronic power switch action of the long-time point of frequent and non-synchronizing, is thorny technological difficulties.
Summary of the invention
Deficiency to prior art; The present invention provides a kind of topology that contains the electromagnetic transient simulation of switching characteristic circuit to divide network method, and this method becomes an independent electromagnetic network with the electronic power switch network design, and network size is little; Do not relate to complicated elements such as generator; Only be electronic power switching circuit and related elements thereof (transformer, inductance, resistance, electric capacity etc.), electro-magnetic transient algorithm use electro-magnetic transient integral algorithm, the trapezoidal integration of retreating Euler method, band damping or its modification change combination are in off-line/switch calculates in real time; Only this child network is carried out iteration or interpolation calculation; Other parts of network are not participated in iteration or interpolation, and the modification of program of electromagnetic network is reduced to minimum, only revise the component models that minority electronic power switches such as turn-off thyristor GTO, diode, inductance, electric capacity relate to; Can farthest guarantee the precision that switch calculates again, and help reducing the workload that transformation is calculated in the electromagnetic transient state procedure parallelization.
The objective of the invention is to adopt following technical proposals to realize:
A kind of topology that contains the electromagnetic transient simulation of switching characteristic circuit is divided network method, and its improvements are that said method comprises the steps:
A, target power system is divided into switch subnet and electromagnetism subnet two parts;
B, said switch subnet and electromagnetism subnet are calculated respectively in an electromagnetism step-length;
Swap data between C, said switch subnet and the electromagnetism subnet;
D, the electro-magnetic transient that said switch subnet and electromagnetism subnet are carried out next step calculate.
Preferably, in the said steps A, said electromagnetism subnet is to comprise a sub-net or a plurality of subnet; The said high-frequency switch circuits such as electronic power switch that relate to are grouped in the switch subnet and calculate.
Preferably, among the said step B, said switch subnet calculated comprise the steps:
A, judge in the electromagnetism step-length whether switch motion is arranged;
B, said switch subnet is calculated in an electromagnetism step-length; The calculating of switch subnet is in non-fault/no switch motion; Adopt with other electromagnetism subnets similar, to said switch subnet and the electro-magnetic transient algorithm that the electromagnetism subnet adopts comprise trapezoidal integration, retreat Euler method, the trapezoidal integration of band damping or its revise change and make up; The switch subnet adopts interpolation algorithm, variable step algorithm, little step length algorithm and iterative algorithm etc. to carry out specially to the accurate Calculation of switch problem to the calculating of said switch subnet when fault/switch motion is arranged, and this is different from other subnets;
Said electromagnetism subnet is carried out electro-magnetic transient to be calculated.
More preferably, interpolation algorithm, variable step algorithm, little step length algorithm and iterative algorithm are adopted in the calculating of said switch subnet.
Preferably, among the said step C, said switch subnet is not after judgement has switch motion, and swap data between the said electromagnetism subnet.Swap data depends on the subnetting connecting mode of taking between the subnet between the electromagnetism subnet; Like node splitting method subnetting, long power transmission line decoupling zero subnetting, transformer subnetting and the equivalent Dai Weinan/promise subnetting etc. that pauses; If long power transmission line decoupling zero subnetting, transformer subnetting, then the data of exchange comprise interface voltage and the interface current that the other side's subnet goes on foot when current; The subnetting if node splitting method subnetting, equivalent Dai Weinan/promise pause, then the data of exchange comprise interface voltage and the interface current that the other side's subnet goes on foot when current at the interface equivalent circuit.
More preferably, to the electro-magnetic transient algorithm use trapezoidal integration of said switch subnet and the employing of electromagnetism subnet, the trapezoidal integration of retreating Euler method, band damping or its modification change combination.
Preferably, the subnetting connecting mode behind the said subnetting comprises node splitting method subnetting, long power transmission line decoupling zero subnetting, transformer subnetting and the equivalent Dai Weinan/promise subnetting that pauses.
Subnetting is in A step, after the subnetting connecting mode is exactly subnetting, between the different electric magneton net when each calculates in the step with the connect algorithm model that connects calculating and exchanges data between other subnets mutually.That is: in the time of one in the step, different sub-network is to calculate separately respectively, each subnet calculate own in; How to consider the influence of the result of other adjacent subnets to this subnet; Be exactly the algorithm that subnetting connects, this has had some ripe theoretical, node splitting method subnetting, long power transmission line decoupling zero subnetting, transformer subnetting and the equivalent Dai Weinan/promise subnetting algorithm that pauses; The present invention can compatible these different algorithms, popularity that can restriction is used because algorithm is different.
With the prior art ratio, the beneficial effect that the present invention reaches is:
1, the present invention is on the basis of existing electromagnetic transient in power system software etc.; When carrying out the calculating of switching characteristic circuit; Can improve the computing velocity of switch subnet; Helping real-time calculates; The precision of calculating for switch provides time margin, can be applicable in real time, during the ultra electromagnetic transient simulation that comprises switching characteristic circuit such as electronic power switch, high frequency electrical switch real-time, calculated off-line calculates, wherein the calculating of switch subnet can be compatible mutually with various electro-magnetic transient switching algorithms and be not limited to as: interpolation algorithm, variable step algorithm and little step length algorithm or its modification are changed and are made up etc.; Effectively improve the computing velocity and the precision of emulation, optimize the real-time calculated performance of electro-magnetic transient.
2, the topology that contains the electromagnetic transient simulation of switching characteristic circuit provided by the invention is divided network method; Switch subnet and other electromagnetism subnets calculate respectively in an electromagnetism step-length, the electromagnetic network of this method and switch subnet at electro-magnetic transient algorithm (trapezoidal integration, trapezoidal integration or its of retreating Euler method, band damping are revised the change combination), calculate the compatible identical or different algorithms in aspects such as step-length, iterations and design.
3, the present invention is in the electro-magnetic transient that comprises complicated on-off circuit calculates; Become an independent electromagnetic network to the electronic power switch network design; Network size is little, does not relate to complicated elements such as generator, only is electronic power switching circuit and related elements thereof (transformer, inductance, resistance, electric capacity etc.); Algorithm still adopts electro-magnetic transient integral algorithm/retreat Euler method; In off-line/switch calculated in real time, only this child network was carried out iteration or interpolation calculation, and other parts of network are not participated in iteration or interpolation; Modification of program to electromagnetic network is reduced to minimum; Only revise the component models that minority electronic power switches such as turn-off thyristor GTO, diode, inductance, electric capacity relate to, can farthest guarantee the precision that switch calculates again, and help reducing the workload that transformation is calculated in the electromagnetic transient state procedure parallelization.
Description of drawings
Fig. 1 is the switching characteristic subnet subnetting schematic diagram calculation that the topology that contains the electromagnetic transient simulation of switching characteristic circuit provided by the invention is divided network method;
Fig. 2 is that the topology that contains the electromagnetic transient simulation of switching characteristic circuit provided by the invention is divided the network method workflow diagram;
Fig. 3 is the switching characteristic subnet subnetting schematic diagram calculation that the topology of the electromagnetic transient simulation that contains the switching characteristic circuit of specific embodiment provided by the invention is divided network method;
Fig. 4 is the workflow diagram that the topology of the electromagnetic transient simulation that contains the switching characteristic circuit of specific embodiment provided by the invention is divided network method.
Embodiment
Do further to specify below in conjunction with the accompanying drawing specific embodiments of the invention.
As shown in Figure 1, Fig. 1 is the switching characteristic subnet subnetting schematic diagram calculation that the topology that contains the electromagnetic transient simulation of switching characteristic circuit provided by the invention is divided network method; The switching characteristic circuit comprises switching characteristic subnet circuit and other electro-magnetic transient networks.Switching characteristic subnet (being called for short the switch subnet) does not relate to complicated elements such as generator; Only be electronic power switching circuit and related elements thereof (transformer, inductance, resistance, electric capacity etc.); So-called other electro-magnetic transient networks are that the conventional electro-magnetic transient of tradition calculates subnet; Do not comprise the electronic power switching circuit that needs accurate Calculation, be the network beyond the switching characteristic subnet, as comprise the component models that some complicated switch subnets such as generator element are not suitable for calculating.
As shown in Figure 2, Fig. 2 is that the topology that contains the electromagnetic transient simulation of switching characteristic circuit provided by the invention is divided the network method workflow diagram; The topology that contains the electromagnetic transient simulation of switching characteristic circuit provided by the invention divides network method to comprise the steps:
A, begin to calculate, target power system is divided into switch subnet and electromagnetism subnet two parts; Wherein other electromagnetism subnet portions can be that a sub-net also can be decomposed into a plurality of subnets; Relating to high-frequency switch circuits such as electronic power switch is grouped in the switch subnet and calculates.
B, said switch subnet and electromagnetism subnet are calculated respectively in an electromagnetism step-length: said switch subnet is calculated comprise the steps:
A, judge in the electromagnetism step-length whether switch motion is arranged;
B, split and close subnet and in an electromagnetism step-length, calculate; The calculating of switch subnet is in non-fault/no switch motion; Adopt with other electromagnetism subnets similar, to said switch subnet and the electro-magnetic transient algorithm that the electromagnetism subnet adopts comprise trapezoidal integration, retreat Euler method, the trapezoidal integration of band damping or its revise change and make up; The switch subnet adopts interpolation algorithm, variable step algorithm, little step length algorithm and iterative algorithm etc. to carry out specially to the accurate Calculation of switch problem to the calculating of said switch subnet when fault/switch motion is arranged, and this is different from other subnets;
The electromagnetism subnet is carried out electro-magnetic transient to be calculated; Wherein the calculating of switch subnet can be compatible and be not limited to like interpolation algorithm, variable step algorithm and little step length algorithm etc., and the electromagnetic network of this method can adopt identical or different designs with the switch subnet at aspects such as electromagnetism algorithm, calculating step-length, iterationses; Electro-magnetic transient algorithm to said switch subnet and the employing of electromagnetism subnet comprises trapezoidal integration, retreats Euler method, is with the trapezoidal integration of damping or its modification change to make up.
Swap data between C, said switch subnet and the electromagnetism subnet: the switch subnet is not after judgement has switch motion, and swap data between other electromagnetism subnets.
Swap data depends on the subnetting connecting mode of taking between the subnet between the electromagnetism subnet; Like node splitting method subnetting, long power transmission line decoupling zero subnetting, transformer subnetting and the equivalent Dai Weinan/promise subnetting etc. that pauses; If long power transmission line decoupling zero subnetting, transformer subnetting; Then the data of exchange comprise interface voltage and the interface current that the other side's subnet goes on foot when current; The subnetting if node splitting method subnetting, equivalent Dai Weinan/promise pause, then the data of exchange comprise interface voltage and the interface current that the other side's subnet goes on foot when current at the interface equivalent circuit.
D, the electro-magnetic transient that said switch subnet and electromagnetism subnet are carried out next step calculate.
Below in conjunction with specific embodiment the present invention is done further detailed description.
Embodiment
Shown in Fig. 3 and 4; Fig. 3 is the switching characteristic subnet subnetting schematic diagram calculation that the topology of the electromagnetic transient simulation that contains the switching characteristic circuit of specific embodiment provided by the invention is divided network method; Fig. 4 is the workflow diagram that the topology of the electromagnetic transient simulation that contains the switching characteristic circuit of specific embodiment provided by the invention is divided network method, and this method comprises the steps:
1, begins to calculate;
2, target power system is divided into three parts: switch subnet and other electromagnetism subnets and electromechanical transient subnet, wherein other electromagnetism subnet portions can be that a sub-net also can be decomposed into a plurality of subnets; Relating to high-frequency switch circuits such as electronic power switch is grouped in the switch subnet and calculates.The network that network that other are bigger or accuracy requirement are not high incorporates in the electromechanical transient network and calculates.
3, switch subnet and other electromagnetism subnets calculate respectively in an electromagnetism step-length; Wherein the calculating of switch subnet can be compatible and be not limited to like interpolation algorithm, variable step algorithm and little step length algorithm, iterative computation etc., and the electromagnetic network of this method and switch subnet can adopt identical or different designs at aspects such as electromagnetism algorithm (trapezoidal integration, retreat Euler method), calculating step-length, iterationses; The electromechanical transient subnet carries out electromechanical transient and calculates.
4, the switching characteristic subnet is not after judgement has switch motion, and swap data between other electromagnetism subnets, swap data between electromagnetism subnet and the electromechanical transient subnet.
5, after the swap data, the electro-magnetic transient that each electromagnetism subnet carries out next step calculates.Dynamo-electric subnet calculates in the bigger step-length of oneself.
Method provided by the invention is in the electro-magnetic transient that comprises complicated on-off circuit calculates; Become an independent electromagnetic network to the electronic power switch network design, network size is little, does not relate to complicated elements such as generator; Only be electronic power switching circuit and related elements thereof (transformer, inductance, resistance, electric capacity etc.); Algorithm still adopts electro-magnetic transient integral algorithm/retreat Euler method, and in off-line/switch calculated in real time, only this child network oneself was carried out iteration or interpolation calculation; Other parts of network are not participated in iteration or interpolation; Modification of program to electromagnetic network is reduced to minimum like this, only revises the component models that minority electronic power switches such as turn-off thyristor GTO, diode, inductance, electric capacity relate to, and can farthest guarantee the precision that switch calculates again.
Should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not to its restriction; Although the present invention has been carried out detailed explanation with reference to the foregoing description; Under the those of ordinary skill in field be to be understood that: still can specific embodiments of the invention make amendment or be equal to replacement; And do not break away from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1. a topology that contains the electromagnetic transient simulation of switching characteristic circuit is divided network method, it is characterized in that, said method comprises the steps:
A, target power system is divided into switch subnet and electromagnetism subnet two parts;
B, said switch subnet and electromagnetism subnet are calculated respectively in an electromagnetism step-length;
Swap data between C, said switch subnet and the electromagnetism subnet;
D, the electro-magnetic transient that said switch subnet and electromagnetism subnet are carried out next step calculate.
2. topology as claimed in claim 1 is divided network method, it is characterized in that in the said steps A, said electromagnetism subnet is to comprise a sub-net or a plurality of subnet; The said high-frequency switch circuit that relates to is grouped in the switch subnet and calculates.
3. topology as claimed in claim 1 is divided network method, it is characterized in that, among the said step B, said switch subnet calculated comprises the steps:
A, judge in the electromagnetism step-length whether switch motion is arranged;
B, said switch subnet is calculated in an electromagnetism step-length;
Said electromagnetism subnet is carried out electro-magnetic transient to be calculated.
4. topology as claimed in claim 3 is divided network method, it is characterized in that, interpolation algorithm, variable step algorithm, little step length algorithm and iterative algorithm are adopted in the calculating of said switch subnet.
5. topology as claimed in claim 1 is divided network method, it is characterized in that among the said step C, said switch subnet is not after judgement has switch motion, and swap data between the said electromagnetism subnet.
6. topology as claimed in claim 1 is divided network method, it is characterized in that, to the electro-magnetic transient algorithm use trapezoidal integration of said switch subnet and the employing of electromagnetism subnet, the trapezoidal integration of retreating Euler method, band damping or its modification change combination.
7. topology as claimed in claim 1 is divided network method, it is characterized in that, the subnetting connecting mode behind the said subnetting comprises node splitting method subnetting, long power transmission line decoupling zero subnetting, transformer subnetting and the equivalent Dai Weinan/promise subnetting that pauses.
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| CN107305592A (en) * | 2016-04-19 | 2017-10-31 | 全球能源互联网研究院 | A kind of numerical value emulation method applied to on-off circuit electromagnetic transient analysis |
| CN107958120A (en) * | 2017-11-30 | 2018-04-24 | 上海电力学院 | A kind of system Thevenin's equivalence calculation method of parameters based on power series expansion |
| CN109783845A (en) * | 2018-12-05 | 2019-05-21 | 中国电力科学研究院有限公司 | Electromechanics-electromagnetism hybrid simulation subnetting method and device that boundary point divides group to decouple |
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| CN110196997A (en) * | 2019-04-30 | 2019-09-03 | 中国电力科学研究院有限公司 | A kind of electro-magnetic transient Asynchronous parallel computation method and device |
| CN110765584A (en) * | 2019-09-27 | 2020-02-07 | 清华四川能源互联网研究院 | Electromagnetic transient simulation algorithm, system, medium and equipment containing multi-switch element |
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| CN112308402A (en) * | 2020-10-29 | 2021-02-02 | 复旦大学 | Power time series data abnormity detection method based on long and short term memory network |
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| CN102982203B (en) * | 2012-11-15 | 2015-06-24 | 中国电力科学研究院 | Optimization method of parameters of small step switch model |
| CN104951634A (en) * | 2015-07-22 | 2015-09-30 | 中国电力科学研究院 | Method for restraining electromagnetic transient simulation virtual power consumption of controllable power electronic device |
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| CN107305592B (en) * | 2016-04-19 | 2021-04-06 | 全球能源互联网研究院 | Numerical simulation method applied to electromagnetic transient analysis of switch circuit |
| CN107305592A (en) * | 2016-04-19 | 2017-10-31 | 全球能源互联网研究院 | A kind of numerical value emulation method applied to on-off circuit electromagnetic transient analysis |
| CN107958120A (en) * | 2017-11-30 | 2018-04-24 | 上海电力学院 | A kind of system Thevenin's equivalence calculation method of parameters based on power series expansion |
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| CN109829178A (en) * | 2018-10-26 | 2019-05-31 | 贵州电网有限责任公司 | A kind of substation's real-time emulation method based on model split plot design |
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| CN109783845B (en) * | 2018-12-05 | 2023-07-18 | 中国电力科学研究院有限公司 | Electromechanical-electromagnetic hybrid simulation network separation method and device for boundary point grouping decoupling |
| CN109948185A (en) * | 2019-02-01 | 2019-06-28 | 全球能源互联网研究院有限公司 | A kind of decoupling emulation mode of electric system |
| CN110196997A (en) * | 2019-04-30 | 2019-09-03 | 中国电力科学研究院有限公司 | A kind of electro-magnetic transient Asynchronous parallel computation method and device |
| CN110196997B (en) * | 2019-04-30 | 2024-04-26 | 中国电力科学研究院有限公司 | Electromagnetic transient asynchronous parallel computing method and device |
| CN110807244A (en) * | 2019-09-25 | 2020-02-18 | 中国电力科学研究院有限公司 | Electromagnetic transient simulation method and device for power electronic switch |
| CN110765584A (en) * | 2019-09-27 | 2020-02-07 | 清华四川能源互联网研究院 | Electromagnetic transient simulation algorithm, system, medium and equipment containing multi-switch element |
| CN110765584B (en) * | 2019-09-27 | 2020-10-23 | 清华四川能源互联网研究院 | Electromagnetic transient simulation method, system, medium and equipment containing multi-switch element |
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| CN112308402B (en) * | 2020-10-29 | 2022-04-12 | 复旦大学 | Power time series data abnormity detection method based on long and short term memory network |
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