CN101527455A - Interconnected electric network distributed current calculating method on the basis of alternation and iteration of current module - Google Patents
Interconnected electric network distributed current calculating method on the basis of alternation and iteration of current module Download PDFInfo
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Abstract
The invention discloses an interconnected electric network distributed current calculating method which is based on alternation and iteration of current module. The method comprises that initiation is carried out to current calculating module data of an inner net and an outer net firstly; alternation and iteration of the inner net current calculating module and the outer net current calculating module are carried out in a current calculating task computer of the inner net dispatching and controlling centre so as to present linkage of electric relationships of the inner and outer nets, thereby converging two independent currents into a uniform target current solution. The method employs an integrated calculating mode, so as to avoid complex work of prototype model splicing and computation module splicing; the method has precise calculation result and strong integrity and is free of special requirements to current calculating module and algorithm. Therefore, the method can be widely applicable to various application areas of power network analysis, such as EMS, DTS, offline power network operation analysis and calculation and so on. Therefore, the method has relatively strong popularization and application value.
Description
Technical field
The present invention relates to a kind of distributed tidal current computing method towards interconnected network, relate in particular to a kind of trend computational problem that has a plurality of dispatching control centers of electric connecting relation at the administration electrical network, replace the interconnected network distributed tidal current computing method of iteration based on the trend module, belong to the power system dispatching automation technique field.
Background technology
Electric power system is a unified complex large system of dispatching and moving of being made up of power plant, transformer station, transmission and distribution networks and user.In electric power system, because power supply point and load center majority are in different regions, electric energy also can't store in a large number, so electrical energy production must keep and equilibrium consumption constantly.Electric power system need be provided with corresponding dispatching patcher in each link and different levels, obtains the supply of electrical energy of high-quality and safety to guarantee the user.
Modern automation system for the power network dispatching is to be the control core system with the computer, comprises real time information collection and display system, and for calculate in real time, analyze, the software systems of control usefulness.Information gathering and display system have data acquisition, safety detection, trend is calculated and the function of real-time control.Acquisition of information in power plant and transformer station partly is called the telemechanical end, and the part that is positioned at dispatching control center is called dispatching terminal.Software systems are recovered supervisor by static state estimation, automatic generation control, optimal load flow, automatic voltage and idle control, load prediction, the plan of optimum unit start-stop, security monitoring and safety analysis, emergency control and circuit and are formed.
In China, the dispatching of power netwoks operational management has the characteristics of layer distributed, vertical scheduling.Electrical network that each dispatching control center is administered is whole interconnected, interactional.Along with the development of electrical network, the electrical link between electrical network is more and more tightr, and reciprocal influence strengthens day by day.Therefore, various on-line analysis control system in the dispatching of power netwoks field, in EMS (EMS) and DTS (dispatcher training analogue system), needed to consider to solve the trend computational problem that the electrical network of administering has a plurality of dispatching control centers of electric connecting relation.
Unify trend for the whole network that accurately calculates under the outer net influence, mainly contain following several technology implementation method now:
1) " disperses modeling, full model splicing, centralized calculation ".This method has guaranteed the correctness of centralized calculation, and shortcoming is standardization derivation, the importing that model splicing need carry out model, and workload is big, efficient is lower, and the amount of calculation of centralized calculation is big simultaneously.For example in application number is 200610166302.1 Chinese patent application " method of jointing multiple regional net models of electric power system ", described how each dispatching control center model splicing is become centralized full model, do not calculated but do not relate to the tidal current analysis that how to carry out electric power system.At application number is in 200710191542.1 the Chinese patent application " based on the interconnection system distributed tidal current computing method of computation model splicing ", carry out splicing in certain dispatching control center side, after centralized and unified finding the solution, the result sent back to corresponding each dispatching control center based on the non-linear solving equation of trend.This method has kept the advantage of centralized calculation, has avoided complicated systemic model splicing and maintenance work; But its shortcoming is: 1) joining method and algorithm height coupling, when having only many dispatching control centers all to adopt identical algorithm, could splice easily when preferably adopting same supplier's product; 2) be not suitable for the application scenarios that DTS etc. needs each dispatching control center continuous interactive trend mode.
2) " disperse modeling, the equivalent splicing of model, centralized calculation ".In the paper " different external network equivalent models are to the experimental study of EMS effect influence " (being stated from " electric power network technique " 2006 the 30th the 3rd phases of volume) that Zhang Haibo etc. is delivered, recommended the external network equivalent method of a kind of employing based on the equivalent net of buffering net stack.This method has been carried out equivalent simplification to outside electric network model, has reduced amount of calculation, but its shortcoming is: 1) need carry out model splicing, model is derived, is imported, and maintenance workload is big; 2) equivalent simplification is calculated and is brought certain computational accuracy error; 3) under application scenarioss such as DTS, need carry out online equivalent result's issue continuously, efficient is lower.
3) " disperse modeling, distribute and calculate ".In the paper " composition decomposition computation schema research between many dispatching control centers " (being stated from " Proceedings of the CSEE " 2006 the 26th 22 phases of volume) that Zhang Baiming etc. delivers, synchronous/asynchronous computation schema to the distributed trend of many dispatching control centers is studied, and has provided the corresponding calculated model.In the paper " distributed tidal current is calculated replenishing and improving of asynchronous iteration pattern " (being stated from " Automation of Electric Systems " 2007 the 31st the 2nd phases of volume) that Zhang Haibo etc. is delivered, emphatically the convergence property of asynchronous iteration is resolved, and computation schema and cooperation layer agency mechanism are provided.The general character of said method is: 1) according to the management area electrical network is calculated and carry out piecemeal, the piece that each dispatching control center only carries out in the one's respective area calculates; Set up the coordinating and unifying between the calculating of cooperation layer realization piece; 2) calculating of finding the solution of nonlinear equation is distributed in each computer center on the network.The advantage of these class methods is that the mutual amount of information is less, but its shortcoming is to require the application program based on trend is calculated must carry out the internal transformation, and trend calculating is the basic module that electrical network analysis calculates, and application surface is very wide, and the cost that therefore will promote this technology is quite big.Though at application number is in the Chinese patent application " economize, the Combined anti-accident maneuver method of two stage power system " of 200710099082.X, has provided a kind of trend tracking and matching algorithm.But the essence of this algorithm is to utilize the layer distributed characteristic of two electrical networks, designed a kind of algorithm that dynamically mates mutually continuously, follows the tracks of, the strict trend that can not obtain under a certain given time, the given solving condition is separated, can not be applied to conventional trend calculates, only be applicable to the Simulation Application based on continuous tide such as DTS, and can not solve the statements based on collusion problem between area power grid.
Summary of the invention
In view of above-mentioned existing in prior technology deficiency, technical problem to be solved by this invention is to provide a kind of distributed tidal current computing method towards interconnected network, this method has the trend computational problem of a plurality of dispatching control centers of electric connecting relation at the administration electrical network, replace iteration based on the trend module and be achieved.
For realizing above-mentioned goal of the invention, the present invention adopts following technical scheme:
A kind ofly replace the interconnected network distributed tidal current computing method of iteration, be used in the interconnected network that comprises Intranet dispatching control center and outer net dispatching control center, it is characterized in that comprising following step based on the trend module:
(1) described Intranet dispatching control center obtains outer net trend computation model and trend calculating specified criteria from described outer net dispatching control center, and outer net trend computing module is carried out initialization;
(2) described Intranet dispatching control center forms Intranet trend computation model and trend calculating specified criteria, and net current calculating module is carried out initialization;
(3) the mutual comport interface information of trend of definition net current calculating module and outer net trend computing module is calculated the mutual interface trend departure of coordinating of inside and outside net trend;
(4) if interface trend departure meets the computational accuracy requirement, then change step (5) over to, otherwise, manually adjust the trend of net current calculating module and calculate specified criteria, start inner trend computing module and calculate again, meet the computational accuracy requirement until interface trend departure;
(5) the computing node type of the external network equivalent unit machine end node of Intranet trend is made as node voltage and phase angle is a known conditions, node voltage and phase angle are got the voltage and the phase angle of the interactive interface node of outer net trend respectively;
(6) start described net current calculating module and carry out a trend calculating, do not restrain, then withdraw from whole calculating if trend is calculated; Otherwise change step (7) over to;
(7) the computing node type with the equivalent unit machine end node of net within the outer net trend is made as meritorious, the idle known conditions that is injected to of node, and the interactive interface equipment meritorious, that idle value is got the Intranet trend respectively is meritorious and idle;
(8) start described outer net trend computing module and carry out a trend calculating, do not restrain, then withdraw from whole calculating if trend is calculated; Otherwise change step (9) over to;
(9) recomputate the mutual interface trend departure of coordinating of inside and outside net trend;
(10) if interface trend departure meets the computational accuracy requirement, then export calculation of tidal current, withdraw from whole calculating; Otherwise, go back to step (5) and continue to calculate.
In step (10), if alternately number of iterations is greater than pre-determined number, then show to calculate to be divergent state, need withdraw from whole calculating.
Wherein, described trend calculates that meritorious that specified criteria comprises generator exerted oneself, idle exerting oneself or the meritorious size of set end voltage load and voltage and the phase angle and the node type of bus in trend is calculated of idle big or small bus.
The mutual comport interface information of described trend comprises the mapping relations of the equipment in the external network equivalent unit and described outer net trend computing module in the described net current calculating module; The mapping relations of the topological node of corresponding same physical location in the topological node of external network equivalent unit and the described outer net trend computing module in the described net current calculating module; The mapping relations of the equipment in the described outer net trend computing module in equivalent unit of Intranet and the described net current calculating module; The mapping relations of the topological node of corresponding same physical location in the topological node of the equivalent unit of Intranet and the described net current calculating module in the described outer net trend computing module.
Described interface trend departure is:
The voltage magnitude of the interactive interface node of meritorious, the idle difference of the external network equivalent unit of Intranet trend and the interactive interface equipment of outer net trend and the external network equivalent unit machine end node of Intranet trend and outer net trend, the minimum value of voltage phase angle difference; Perhaps
Net the voltage magnitude of the interactive interface node of equivalent unit machine end node and Intranet trend, the minimum value of voltage phase angle difference within meritorious, the idle difference of the interactive interface equipment of equivalent unit of net and Intranet trend and the outer net trend within the outer net trend.
Voltage phase angle is determined in the following manner: based on the existing node of each the interactive interfacing node-topological island information of inside and outside net trend computation model, each interactive interfacing node is divided into groups according to topological island, selecting one of them interactive interfacing node in each group is datum node, its angle values is zero, and the phase angle of other node is a reference data with this point all.
The trend of described artificial adjustment net current calculating module is calculated specified criteria and is comprised that carrying out the switch branch/adjustment of closing, load, generating adjustment or transformer adjustment separately operates.
Interconnected network distributed tidal current computing method provided by the present invention adopts the centralized calculation pattern, has avoided the complicated work of archetype splicing or computation model splicing; Result of calculation is accurate, and integration is strong, has avoided the specific (special) requirements to trend computation model and algorithm, therefore can be widely used in each application of electrical network analysis, as EMS, DTS and off-line operation of power networks analytical calculation etc., has stronger application value.
Description of drawings
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is the electric connecting relation schematic diagram of a typical interconnected network;
Fig. 2 is the schematic diagram of reflection interconnected network and inside and outside net trend computation model corresponding relation;
Fig. 3 is that the network of distributed tidal current computing method distributes and the deployment schematic diagram.
Embodiment
Electrical network is interconnected to be the general trend of world today's power technology development.In China, the electrical network that each dispatching control center is administered is whole interconnected, interactional.Based on these characteristics, the present invention puts forth effort to solve the trend computational problem that the electrical network of administering has a plurality of dispatching control centers of electric connecting relation.
Interconnected network distributed tidal current computing method provided by the present invention is meant towards the use of local scheduling control centre, considers the model and the operational mode of external electrical network when operation of power networks is analyzed, and obtains unified the whole network trend result's computational methods.This distributed tidal current computing method is widely used in the various on-line analysis systems of dispatching of power netwoks control centre most, and as EMS and DTS, its principle equally also can be applied to the off-line analysis application certainly.
Below, be that example is described in detail this interconnected network distributed tidal current computing method with a internal electric network and a plurality of external electrical network with electric connecting relation.Here " internal electric network " is meant local scheduling electrical network that control centre administers, and is called for short " Intranet "; " external electrical network " is meant remote dispatching electrical network that control centre administers, and is called for short " outer net ".
Fig. 1 has shown the electric connecting relation of a typical interconnected network.In this interconnected network, comprise an internal electric network and a plurality of external electrical network (abbreviate as respectively outer net 1, outer net 2 ... outer net n, wherein n is a positive integer).Wherein Intranet is electrically connected with each outer net respectively, and outer net 1 and outer net 2 also have electric connecting relation.
Figure 2 shows that the corresponding relation of interconnected network and inside and outside net trend computation model.Wherein the left side is typical intranet and extranet electric connecting relation, and the right side is the inside and outside net trend computation model that inside and outside network control system center is set up respectively.In Fig. 2, " the equivalent unit of net within the outer net trend " just in time becomes " the interactive interface equipment of outer net trend ", and " the external network equivalent unit of Intranet trend " just in time becomes " the interactive interface equipment of Intranet trend "; The machine end node of equivalent unit just in time becomes " interactive interface node " accordingly.
The present invention had carried out following condition hypothesis before carrying out the distributed tidal current calculation:
1. Intranet dispatching control center and outer net dispatching control center all have separately trend computation model and data.Trend computation model herein is meant the topological connection relation of grid equipment and equipment electric parameter etc.At a certain its trend computation model of electrical network structure is the routine techniques that the power domain those of ordinary skill can both be grasped, and does not just describe in detail at this.
2. in the trend computation model of Intranet dispatching control center external electrical network is carried out equivalent simplification and handled, set up external network equivalent model; Equally, in the trend computation model of outer net dispatching control center internal electric network is carried out equivalent simplification and handled, set up the Intranet Equivalent Model; Consider that all might there be power supply in Intranet, outer net, therefore inside and outside net Equivalent Model all is treated to equivalent unit.
3. the intersection of the model of the trend computation model of Intranet dispatching control center and outer net dispatching control center should cover whole grid equipment models of whole interconnected network.
4. overlapping electrical network part has identical electric parameter (as resistance, reactance, charging capacitor, branch head type) and identical equipment state (as switch, disconnecting link state, unit output, payload etc.) as alternating current circuit or transformer etc. in the trend computation model of the trend computation model of Intranet dispatching control center and outer net dispatching control center.
Based on above-mentioned condition hypothesis, the present invention has provided a kind of distributed tidal current computing method unspliced, that calculate based on the alternately iterative coordination of intranet and extranet trend module.Fig. 3 is that the network of this distributed tidal current computing method distributes and the deployment schematic diagram.In the outer net dispatching control center, carry out the initialization of outer net trend computation model data.Data after the initialization enter outer net trend computing module.In " the trend calculation task computer " of Intranet dispatching control center, the alternately iteration of carrying out " net current calculating module " and " outer net trend computing module " is to embody the contact of inside and outside net electrical relation, thereby make two independently trend converge on unified target trend and separate, therefore do not need to carry out the basic model splicing or the computation model splicing of inside and outside pessimistic concurrency control.
This method comprises following implementation step:
1. the Intranet dispatching control center obtains outer net trend computation model and trend calculating specified criteria from the outer net dispatching control center, and " the outer net trend computing module " on " the trend calculation task computer " that be deployed in the Intranet dispatching control center (" task engine " is called for short in the back) carried out initialization, form the initial trend section of outer net.
Above-mentioned trend is calculated the known conditions that specified criteria is meant that trend is calculated, comprise generator meritoriously exert oneself, idle exerting oneself or set end voltage, the meritorious size and the idle size of load, the voltage of bus and phase angle, and the node type of bus in trend is calculated.The bus nodes type can be divided into PQ node (be node meritorious, the idle known conditions that is injected to), PV node (being that node is meritorious injects and voltage is known conditions) and V θ node (being that node voltage and phase angle are known conditions) etc.
2. the Intranet dispatching control center forms Intranet trend computation model and trend calculating specified criteria, and " net current calculating module " that be deployed in " task engine " carried out initialization, forms the initial trend section of Intranet.
Above-mentioned " net current calculating module " and " outer net trend computing module " are all realized based on traditional flow calculation program.These two computing modules can adopt multiple different power flow algorithm, as adopting inferior method of newton-pressgang or the quick decomposition method of PQ respectively, the detailed description of these methods can be referring to the power system analysis textbook of classics, as Zhu Junwei chief editor " power system analysis " first volume (China Electric Power Publishing House's nineteen ninety-five front page), " high electric network analysis " (publishing house of Tsing-Hua University front page in 1996) of Zhang Baiming, Chen Shousun work.Typically " trend computing module " as the trend computational analysis part in the PSASP software kit of China Electric Power Research Institute, dispatcher's trend among the CC-2000EMS of the product of Beijing Kedong Power Control System Co., Ltd. and the dispatcher training emulation trend among the CC-2000DTS etc.
Need to prove that the modeling scope that the present invention does not limit inside and outside net trend computation model is the supplementary set of the whole network model each other, promptly allows to exist model overlapping between inside and outside pessimistic concurrency control.In fact the overlapping degree of model adds the calculating convergence that helps unified trend all the better.This method is just looser to modeling demand like this, helps carrying out the system integration more, and the distributed unified trend of the integrated realization of trend computing module that is fit to a plurality of different manufacturers is calculated.
In method of the present invention, trend is calculated essence and is belonged to concentrated.The trend Program for Calculation all is deployed in " task engine ", except the initialization procedure of " outer net trend module ", whole computational process does not need to carry out network service, has therefore avoided the network communication in the trend calculating iterative process, computational process is quick, good stability.
3. define the mutual comport interface information of trend of " net current calculating module " and " outer net trend computing module ".
The mutual comport interface information of trend among the present invention comprises:
(1) mapping relations of the equipment (unit or Zhi Luduan) in external network equivalent unit and " the outer net trend computing module " in " net current calculating module ".The former abbreviates " the external network equivalent unit of Intranet trend " as; The latter abbreviates " the interactive interface equipment of outer net trend " as.
(2) mapping relations of the topological node of corresponding same physical location in the topological node of external network equivalent unit and " the outer net trend computing module " in " net current calculating module ".The former abbreviates " the external network equivalent unit machine end node of Intranet trend " as, and the latter abbreviates " the interactive interface node of outer net trend " as.
(3) mapping relations of the equipment (unit or Zhi Luduan) in the equivalent unit of Intranet and " net current calculating module " in " outer net trend computing module "; The former abbreviates " the equivalent unit of net within the outer net trend " as; The latter abbreviates " the interactive interface equipment of Intranet trend " as.
(4) mapping relations of the topological node of corresponding same physical location in the topological node of the equivalent unit of Intranet and " net current calculating module " in " outer net trend computing module "; The former abbreviates " the equivalent unit machine end node of net within the outer net trend " as; The latter abbreviates " the interactive interface node of Intranet trend " as.
4. calculate the mutual interface trend departure of coordinating of inside and outside net trend
In the present invention, defining interface trend departure is as follows:
Meritorious, the idle difference of " the external network equivalent unit of Intranet trend " and " the interactive interface equipment of outer net trend " is designated as | dP
Ie-e| and | dQ
Ie-e|;
Voltage magnitude, the voltage phase angle difference of " the external network equivalent unit machine end node of Intranet trend " and " the interactive interface node of outer net trend " | dV
Ie-e| and | d θ
Ie-e|;
Meritorious, the idle difference of " the equivalent unit of net within the outer net trend " and " the interactive interface equipment of Intranet trend " is designated as | dP
Ee-i| and | dQ
Ee-i|;
Voltage magnitude, the voltage phase angle difference of " the equivalent unit machine end node of net within the outer net trend " and " the interactive interface node of Intranet trend " | dV
Ee-i| and | d θ
Ee-i|;
Interface trend departure is | dP
Ie-e|, | dQ
Ie-e|, | dV
Ie-e| and | d θ
Ie-e| minimum value, perhaps get | dP
Ee-i|, | dQ
Ee-i|, | dV
Ee-i| and | d θ
Ee-i| minimum value.
Need to prove that because voltage phase angle θ is just meaningful during only based on identical reference point, therefore the numerical value of above-mentioned θ need carry out the reference point normalized.Promptly based on each interactive interfacing node (comprising the interactive interface node of above-mentioned outer net trend and the interactive interface node of Intranet trend) existing node-topological island information of inside and outside net trend computation model, each interactive interfacing node is divided into groups according to topological island, selecting one of them interactive interfacing node in each group is datum node, its angle values is zero, and the phase angle of other node is a reference data with this point all.
5., then change step 6 over to if the interface trend departure that calculates of above-mentioned steps is zero or very little and is lower than in the acceptable computational accuracy.Otherwise the manually trend of adjustment " net current calculating module " calculating specified criteria (explanation is arranged in the step 6), and startup " inner trend computing module " calculates again, meets the computational accuracy requirement until interface trend departure.Can make the initial condition unanimity of intranet and extranet trend computing module by this step.
6. the content of operation of Intranet trend is set, as carries out switch and the disconnecting link branch/adjustment of closing, load, generator output adjustment or transformer and divide first-class adjustment operation.This operation will be converted to the trend of " net current calculating module " and calculate specified criteria.Particularly: corresponding switch and disconnecting link branch/closing operation, then revise the network topology model that trend is calculated; Corresponding load adjustment is then revised the injection P and the Q of the node of trend calculating; Corresponding generating adjustment is exerted oneself and is adjusted injection P and Q or the machine end node voltage V that then revises the node that calculates; The parameter of the winding branch impedance of trend calculating is then revised in the adjustment separately of corresponding transformer.
7. the computing node type with " the external network equivalent unit machine end node of Intranet trend " is made as V θ node (being that node voltage and phase angle are known conditions), and its V θ value is got the voltage V and the phase angle theta of " the interactive interface node of outer net trend " respectively.
The numerical value of above-mentioned θ need carry out the reference point normalized equally.
8. start " net current calculating module ", carry out a trend and calculate.Do not restrain if trend is calculated, then withdraw from whole calculating; If trend is calculated convergence, then proceed next step.
9. computing node type that will " within the outer net trend net equivalent unit machine end node " is made as PQ node (be node is meritorious, the idle known conditions that is injected to), and its PQ value is got the meritorious P and the idle Q of " the interactive interface equipment of Intranet trend " respectively.
10. start " outer net trend computing module ", carry out a trend and calculate.Do not restrain if trend is calculated, then withdraw from whole calculating; If trend is calculated convergence, then proceed next step.
11. recomputate the mutual interface trend departure of coordinating of intranet and extranet trend.
The computational process of this step is the same with step 4.If interface trend departure be zero or very little and the acceptable computational accuracy in region in, then represent the convergence of whole trend, can export calculation of tidal current this moment, withdraws from whole calculating; Otherwise, go back to step 7 and continue to calculate.
If this alternately number of iterations greater than pre-determined number, as 30 times, shows then to calculate to be divergent state that need withdraw from whole calculating this moment.
In above-mentioned whole mutual iterative process, inside and outside net trend all only need be carried out the decomposition of first-order factor table, and all the other only relate to the former generation backward steps that trend is calculated, so amount of calculation does not obviously increase.In addition, do not simplify the operation, so result of calculation is more accurate than various equivalent simplification computational methods owing in computational process, carry out large-scale equivalence.
This interconnected network distributed tidal current computing method has been avoided the splicing and the reconstructed operation of basic model, has avoided complicated importing, the maintenance work of derivation.This method does not need to adopt the height coupling of splicing in the computation model splicing class methods with algorithm, therefore the tidal current computing method that does not limit intranet and extranet is inferior method of newton-pressgang or the quick decomposition method of PQ, the information that the admittance battle array etc. that does not also need to know the outer net tide model and trend solution are closely related.
More than the interconnected network distributed tidal current computing method that replaces iteration based on the trend module provided by the present invention is had been described in detail.For one of ordinary skill in the art, any conspicuous change of under the prerequisite that does not deviate from connotation of the present invention it being done all will constitute to infringement of patent right of the present invention, with corresponding legal responsibilities.
Claims (8)
1. one kind replaces the interconnected network distributed tidal current computing method of iteration based on the trend module, is used in the interconnected network that comprises Intranet dispatching control center and outer net dispatching control center, it is characterized in that comprising following step:
(1) described Intranet dispatching control center obtains outer net trend computation model and trend calculating specified criteria from described outer net dispatching control center, and outer net trend computing module is carried out initialization;
(2) described Intranet dispatching control center forms Intranet trend computation model and trend calculating specified criteria, and net current calculating module is carried out initialization;
(3) the mutual comport interface information of trend of definition net current calculating module and outer net trend computing module is calculated the mutual interface trend departure of coordinating of inside and outside net trend;
(4) if interface trend departure meets the computational accuracy requirement, then change step (5) over to, otherwise, manually adjust the trend of net current calculating module and calculate specified criteria, start inner trend computing module and calculate again, meet the computational accuracy requirement until interface trend departure;
(5) the computing node type of the external network equivalent unit machine end node of Intranet trend is made as node voltage and phase angle is a known conditions, node voltage and phase angle are got the voltage and the phase angle of the interactive interface node of outer net trend respectively;
(6) start described net current calculating module and carry out a trend calculating, do not restrain, then withdraw from whole calculating if trend is calculated; Otherwise change step (7) over to;
(7) the computing node type with the equivalent unit machine end node of net within the outer net trend is made as meritorious, the idle known conditions that is injected to of node, and the interactive interface equipment meritorious, that idle value is got the Intranet trend respectively is meritorious and idle;
(8) start described outer net trend computing module and carry out a trend calculating, do not restrain, then withdraw from whole calculating if trend is calculated; Otherwise change step (9) over to;
(9) recomputate the mutual interface trend departure of coordinating of inside and outside net trend;
(10) if interface trend departure meets the computational accuracy requirement, then export calculation of tidal current, withdraw from whole calculating; Otherwise, go back to step (5) and continue to calculate.
2. as claimed in claim 1ly replace the interconnected network distributed tidal current computing method of iteration, it is characterized in that based on the trend module:
Described trend calculates that meritorious that specified criteria comprises generator exerted oneself, idle exerting oneself or the meritorious size of set end voltage load and voltage and the phase angle and the node type of bus in trend is calculated of idle big or small bus.
3. as claimed in claim 1ly replace the interconnected network distributed tidal current computing method of iteration, it is characterized in that based on the trend module:
Described net current calculating module and described outer net trend computing module all are deployed on the trend calculation task computer of Intranet dispatching control center.
4. as claimed in claim 1ly replace the interconnected network distributed tidal current computing method of iteration, it is characterized in that based on the trend module:
In the described step (3), the mutual comport interface information of described trend comprises the mapping relations of the equipment in the external network equivalent unit and described outer net trend computing module in the described net current calculating module; The mapping relations of the topological node of corresponding same physical location in the topological node of external network equivalent unit and the described outer net trend computing module in the described net current calculating module; The mapping relations of the equipment in the described outer net trend computing module in equivalent unit of Intranet and the described net current calculating module; The mapping relations of the topological node of corresponding same physical location in the topological node of the equivalent unit of Intranet and the described net current calculating module in the described outer net trend computing module.
5. as claimed in claim 1ly replace the interconnected network distributed tidal current computing method of iteration, it is characterized in that based on the trend module:
In the described step (3), described interface trend departure is:
The voltage magnitude of the interactive interface node of meritorious, the idle difference of the external network equivalent unit of Intranet trend and the interactive interface equipment of outer net trend and the external network equivalent unit machine end node of Intranet trend and outer net trend, the minimum value of voltage phase angle difference; Perhaps
Net the voltage magnitude of the interactive interface node of equivalent unit machine end node and Intranet trend, the minimum value of voltage phase angle difference within meritorious, the idle difference of the interactive interface equipment of equivalent unit of net and Intranet trend and the outer net trend within the outer net trend.
6. describedly replace the interconnected network distributed tidal current computing method of iteration as claim 1 or 5, it is characterized in that based on the trend module:
Voltage phase angle is determined in the following manner: based on the existing node of each the interactive interfacing node-topological island information of inside and outside net trend computation model, each interactive interfacing node is divided into groups according to topological island, selecting one of them interactive interfacing node in each group is datum node, its angle values is zero, and the phase angle of other node is a reference data with this point all.
7. as claimed in claim 1ly replace the interconnected network distributed tidal current computing method of iteration, it is characterized in that based on the trend module:
In the described step (4), the trend of described artificial adjustment net current calculating module is calculated specified criteria and is comprised that carrying out the switch branch/adjustment of closing, load, generating adjustment or transformer adjustment separately operates.
8. as claimed in claim 1ly replace the interconnected network distributed tidal current computing method of iteration, it is characterized in that based on the trend module:
In the described step (10), if alternately number of iterations then withdraws from whole calculating greater than pre-determined number.
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