CN102750416B - 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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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, the topology that is specifically related to a kind of electromagnetic transient simulation containing switching characteristic circuit is divided network method.
Background technology
Time-domain-simulation has become Power System Analysis, the important tool of design and researchp, widespread use along with Power Electronic Technique, flexible AC transmission, D.C. high voltage transmission and distributed power generation are in interior electric system links, particularly a large amount of renewable energy power generation equipment generally all needs could access in electrical network by electronic power convertor, and this network topology structure constantly changing in time in essence of electronic power switch has proposed new requirement and challenge to traditional Power System Time Domain Simulation Under, especially the real-time simulation aspect of electro-magnetic transient, how, guarantee to calculate under the prerequisite of real-time, calculate electronic power switch action frequent and the long-time point of non-synchronizing, thorny technological difficulties.
Summary of the invention
For the deficiencies in the prior art, the topology that the invention provides a kind of electromagnetic transient simulation containing switching characteristic circuit is divided network method, the method becomes an independent electromagnetic network by electronic power switch network design, network size is little, do not relate to the complicated elements such as generator, only electronic power switching circuit and related elements (transformer thereof, inductance, resistance, electric capacity etc.), electro-magnetic transient algorithm adopts electro-magnetic transient integral algorithm, retreat Euler method, trapezoidal integration or its modification change combination with damping, in off-line/Real-Time Switch calculates, only this sub-network is carried out iteration or interpolation calculation, other parts of network do not participate in iteration or interpolation, modification of program to electromagnetic network is reduced to minimum, only revise turn-off thyristor GTO, diode, inductance, the component models that the minority electronic power switches such as electric capacity relate to, can farthest guarantee again the precision that switch calculates, and be conducive to reduce the workload that transformation is calculated in electromagnetic transient state procedure parallelization.
The object of the invention is to adopt following technical proposals to realize:
Topology containing the electromagnetic transient simulation of switching characteristic circuit is divided a network method, and its improvements are, described method comprises the steps:
A, target power system is divided into switch subnet and electromagnetism subnet two parts;
B, described switch subnet and electromagnetism subnet are calculated respectively in an electromagnetism step-length;
Swap data between C, described switch subnet and electromagnetism subnet;
D, the electro-magnetic transient that described switch subnet and electromagnetism subnet are carried out to next step calculate.
Preferably, in described steps A, described electromagnetism subnet is to comprise a subnet or a plurality of subnet; The described high-frequency switch circuits such as electronic power switch that relate to are grouped in switch subnet and calculate.
Preferably, in described step B, described switch subnet is calculated and comprised the steps:
A, judge in an electromagnetism step-length whether have switch motion;
B, described switch subnet is calculated in an electromagnetism step-length; The calculating of switch subnet is in non-fault/without switch motion, employing and other electromagnetism subnets are similar, and the electro-magnetic transient algorithm of described switch subnet and the employing of electromagnetism subnet is comprised trapezoidal integration, retreats Euler method, with trapezoidal integration or its modification change of damping, combined; Switch subnet, when having fault/have switch motion, adopts interpolation algorithm, Variable Step Algorithm, little step length algorithm and iterative algorithm etc. to carry out specially for the accurate Calculation of switch problem to the calculating of described switch subnet, and this is different from other subnets;
Described electromagnetism subnet is carried out to electro-magnetic transient calculating.
More preferably, the calculating of described switch subnet is adopted to interpolation algorithm, Variable Step Algorithm, little step length algorithm and iterative algorithm.
Preferably, in described step C, described switch subnet does not have after switch motion in judgement, and swap data between described electromagnetism subnet.Between electromagnetism subnet, swap data depends on the subnetting connecting mode of taking between subnet, as node split method subnetting, long feeder decoupling zero subnetting, transformer subnetting and the equivalent Dai Weinan/promise subnetting etc. that pauses, if long feeder decoupling zero subnetting, transformer subnetting, the data of exchange comprise interface voltage and the interface current that the other side's subnet walks when current; The subnetting if node split method subnetting, equivalent Dai Weinan/promise pause, the data of exchange comprise interface voltage and the interface current that the other side's subnet walks when current at interface equivalent circuit.
More preferably, the electro-magnetic transient algorithm of described switch subnet and the employing of electromagnetism subnet is adopted trapezoidal integration, retreats Euler method, with trapezoidal integration or its modification change of damping, combined.
Preferably, the subnetting connecting mode after described subnetting comprises node split method subnetting, long feeder decoupling zero subnetting, transformer subnetting and the equivalent Dai Weinan/promise subnetting that pauses.
Subnetting is in A step, after subnetting connecting mode is exactly subnetting, between different electromagnetism subnets in each Time step with the connects algorithm model that carries out connecting mutually calculating and exchanges data between other subnets.That is: in the time of one step in, different sub-network is to calculate separately respectively, each subnet is when calculating oneself, how to consider the impact of the result of other adjacent subnets on this subnet, be exactly the algorithm that subnetting connects, this has had some ripe theoretical, node split method subnetting, long feeder 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 the restriction application because algorithm is different.
Compared with the prior art, 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, being conducive to real-time calculates, the precision of calculating for switch provides time margin, can be applicable in real time, super real-time, calculated off-line comprise electronic power switch, during the electromagnetic transient simulation of the switching characteristic circuit such as high frequency electrical switch calculates, wherein the calculating of switch subnet can be compatible and be not limited to as interpolation algorithm mutually with various electro-magnetic transient switching algorithms, Variable Step Algorithm and little step length algorithm or its modification change combination etc., effectively improve computing velocity and the precision of emulation, optimize the real-time calculated performance of electro-magnetic transient.
2, the topology of the electromagnetic transient simulation containing 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 the method and switch subnet at electro-magnetic transient algorithm (trapezoidal integration, retreat Euler method, revise change combination with the trapezoidal integration of damping or its), calculate the algorithm design that the aspects such as step-length, iterations are compatible identical or different.
3, the present invention is in the electro-magnetic transient that comprises complicated on-off circuit calculates, electronic power switch network design is become to an independent electromagnetic network, network size is little, do not relate to the complicated elements such as generator, only electronic power switching circuit and related elements (transformer thereof, inductance, resistance, electric capacity etc.), algorithm still adopts electro-magnetic transient integral algorithm/retreat Euler method, in off-line/Real-Time Switch calculates, only this sub-network is carried out iteration or interpolation calculation, other parts of network do not participate in iteration or interpolation, modification of program to electromagnetic network is reduced to minimum, only revise turn-off thyristor GTO, diode, inductance, the component models that the minority electronic power switches such as electric capacity relate to, can farthest guarantee again the precision that switch calculates, and be conducive to reduce the workload that transformation is calculated in electromagnetic transient state procedure parallelization.
Accompanying drawing explanation
Fig. 1 is the switching characteristic subnet subnetting schematic diagram calculation that the topology of the electromagnetic transient simulation containing switching characteristic circuit provided by the invention is divided network method;
Fig. 2 is that the topology of the electromagnetic transient simulation containing switching characteristic circuit provided by the invention is divided network method workflow diagram;
Fig. 3 is the switching characteristic subnet subnetting schematic diagram calculation that the topology of the electromagnetic transient simulation containing 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 containing switching characteristic circuit of specific embodiment provided by the invention is divided network method.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
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; Switching characteristic circuit comprises switching characteristic subnet circuit and other electro-magnetic transient networks.Switching characteristic subnet (being called for short switch subnet) does not relate to the complicated elements such as generator, only 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 switching characteristic subnet, as comprised, some complicated switch subnets such as generator element are not suitable for the component models 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 network method workflow diagram; The topology of the electromagnetic transient simulation containing switching characteristic circuit provided by the invention divides network method to comprise the steps:
A, start to calculate, target power system is divided into switch subnet and electromagnetism subnet two parts; Wherein other electromagnetism subnet portions can be that a subnet also can be decomposed into a plurality of subnets; Relating to the high-frequency switch circuits such as electronic power switch is grouped in switch subnet and calculates.
B, described switch subnet and electromagnetism subnet are calculated respectively in an electromagnetism step-length: described switch subnet is calculated and comprised the steps:
A, judge in an electromagnetism step-length whether have switch motion;
B, split and close subnet and calculate in an electromagnetism step-length; The calculating of switch subnet is in non-fault/without switch motion, employing and other electromagnetism subnets are similar, and the electro-magnetic transient algorithm of described switch subnet and the employing of electromagnetism subnet is comprised trapezoidal integration, retreats Euler method, with trapezoidal integration or its modification change of damping, combined; Switch subnet, when having fault/have switch motion, adopts interpolation algorithm, Variable Step Algorithm, little step length algorithm and iterative algorithm etc. to carry out specially for the accurate Calculation of switch problem to the calculating of described switch subnet, and this is different from other subnets;
Electromagnetism subnet is carried out to electro-magnetic transient calculating; Wherein the calculating of switch subnet can be compatible and be not limited to as interpolation algorithm, Variable Step Algorithm and little step length algorithm etc., the electromagnetic network of the method and switch subnet at electromagnetic calculation, calculate the aspects such as step-length, iterations and can adopt identical or different designs; Electro-magnetic transient algorithm to described switch subnet and the employing of electromagnetism subnet comprises trapezoidal integration, retreats Euler method, with trapezoidal integration or its modification change of damping, combines.
Swap data between C, described switch subnet and electromagnetism subnet: switch subnet is not after judgement has switch motion, and swap data between other electromagnetism subnets.
Between electromagnetism subnet, swap data depends on the subnetting connecting mode of taking between subnet, as node split method subnetting, long feeder decoupling zero subnetting, transformer subnetting and the equivalent Dai Weinan/promise subnetting etc. that pauses, if long feeder decoupling zero subnetting, transformer subnetting, the data of exchange comprise interface voltage and the interface current that the other side's subnet walks when current, the subnetting if node split method subnetting, equivalent Dai Weinan/promise pause, the data of exchange comprise interface voltage and the interface current that the other side's subnet walks when current at interface equivalent circuit.
D, the electro-magnetic transient that described switch subnet and electromagnetism subnet are carried out to next step calculate.
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment
As shown in Figures 3 and 4, Fig. 3 is the switching characteristic subnet subnetting schematic diagram calculation that the topology of the electromagnetic transient simulation containing 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 containing switching characteristic circuit of specific embodiment provided by the invention is divided network method, and the method comprises the steps:
1, start 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 subnet also can be decomposed into a plurality of subnets; Relating to the high-frequency switch circuits such as electronic power switch is grouped in switch subnet and calculates.The network that the network that other are larger or accuracy requirement are not high, incorporates in 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 as interpolation algorithm, Variable Step Algorithm and little step length algorithm, iterative computation etc., the electromagnetic network of the method and switch subnet at electromagnetic calculation (trapezoidal integration, retreat Euler method), calculate the aspects such as step-length, iterations and can adopt identical or different designs; Electromechanical transient subnet carries out electromechanical transient calculating.
4, switching characteristic subnet is not after judgement has switch motion, and swap data between other electromagnetism subnets, swap data between electromagnetism subnet and electromechanical transient subnet.
5,, after swap data, the electro-magnetic transient that each electromagnetism subnet carries out next step calculates.Dynamo-electric subnet calculates in the larger step-length of oneself.
Method provided by the invention is in the electro-magnetic transient that comprises complicated on-off circuit calculates, electronic power switch network design is become to an independent electromagnetic network, network size is little, do not relate to the complicated elements such as generator, only electronic power switching circuit and related elements (transformer thereof, inductance, resistance, electric capacity etc.), algorithm still adopts electro-magnetic transient integral algorithm/retreat Euler method, in off-line/Real-Time Switch calculates, only this sub-network oneself is carried out iteration or interpolation calculation, other parts of network do not participate in iteration or interpolation, like this modification of program of electromagnetic network is reduced to minimum, only revise turn-off thyristor GTO, diode, inductance, the component models that the minority electronic power switches such as electric capacity relate to, can farthest guarantee again the precision that switch calculates.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although the present invention is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement the specific embodiment of the present invention, and do not depart from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of claim scope of the present invention.
Claims (4)
1. the topology that contains the electromagnetic transient simulation of switching characteristic circuit is divided a network method, it is characterized in that, described method comprises the steps:
A, target power system is divided into switch subnet and electromagnetism subnet two parts;
B, described switch subnet and electromagnetism subnet are calculated respectively in an electromagnetism step-length;
Swap data between C, described switch subnet and electromagnetism subnet;
D, the electro-magnetic transient that described switch subnet and electromagnetism subnet are carried out to next step calculate;
In described steps A, described electromagnetism subnet is to comprise a subnet or a plurality of subnet; The described high-frequency switch circuit that relates to is grouped in switch subnet and calculates;
In described step B, described switch subnet is calculated and comprised the steps:
A, judge in an electromagnetism step-length whether have switch motion;
B, described switch subnet is calculated in an electromagnetism step-length;
The calculating of switch subnet in non-fault/without switch motion, adopt and other electromagnetism subnets similar, the electro-magnetic transient algorithm that described switch subnet and electromagnetism subnet are adopted comprises trapezoidal integration, retreats Euler method, with the trapezoidal integration of damping;
Switch subnet, when having fault/have switch motion, adopts interpolation algorithm, Variable Step Algorithm, little step length algorithm and iterative algorithm to carry out the calculating for switch problem to the calculating of described switch subnet;
Described electromagnetism subnet is carried out to electro-magnetic transient calculating;
In described step C, described switch subnet does not have after switch motion in judgement, and swap data between described electromagnetism subnet.
2. topology as claimed in claim 1 is divided network method, it is characterized in that, the calculating of described switch subnet is adopted to interpolation algorithm, Variable Step Algorithm, little step length algorithm and iterative algorithm.
3. topology as claimed in claim 1 is divided network method, it is characterized in that, the electro-magnetic transient algorithm that described switch subnet and electromagnetism subnet are adopted adopts trapezoidal integration, retreats Euler method, with the trapezoidal integration of damping.
4. topology as claimed in claim 1 is divided network method, it is characterized in that, the subnetting connecting mode after described subnetting comprises node split method subnetting, long feeder decoupling zero subnetting, transformer subnetting and the equivalent Dai Weinan/promise subnetting that pauses.
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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 |
| CN104951634B (en) * | 2015-07-22 | 2018-07-17 | 中国电力科学研究院 | A method of inhibiting the controllable virtual power consumption of power electronic devices electromagnetic transient simulation |
| 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 |
| CN107958120B (en) * | 2017-11-30 | 2021-10-08 | 上海电力学院 | System Thevenin equivalent parameter calculation method based on power series expansion |
| CN109829178B (en) * | 2018-10-26 | 2020-04-14 | 贵州电网有限责任公司 | Transformer substation real-time simulation method based on model segmentation method |
| 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 |
| CN109948185B (en) * | 2019-02-01 | 2020-10-16 | 全球能源互联网研究院有限公司 | Decoupling simulation method of power system |
| 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 |
| 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 |
| CN111709107B (en) * | 2020-06-16 | 2023-03-24 | 全球能源互联网研究院有限公司 | Power network simulation method and system containing large-scale power electronic equipment |
| 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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