Calculation method for generator set output in electric system recovery
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A power system recovery and generator set technology, applied in the field of power systems, can solve the problems of applying the calculation results, not considering the output characteristics of the generator, and not considering whether the power flow of the power generation system is converged, etc.
Inactive Publication Date: 2015-07-08
STATE GRID CORP OF CHINA +2
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Problems solved by technology
[0005] The shortcoming of the scheme for generator set recovery in the above-mentioned prior art is: the output characteristics of the generator are not considered
The output characteristics of the generator directly limit the active power that the generator can generate in a fixed time, ignoring this may cause the calculation results to be unable to be applied in the actual system
Does not consider whether the power flow of the power generation system converges during the recovery process of the generator set,
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Embodiment 1
[0051] The processing flow of a method for calculating the power output of generator sets in power system recovery provided by the embodiment of the present invention is as follows: figure 1 As shown, the following processing steps are included:
[0052] Step S110 , in the process of system recovery, for the charging subsystem composed of the restored part of the power grid, search for all the units adjacent to the above-mentioned charging subsystem based on the existing search algorithm. Then, a new generating set that needs to be restored in the next stage closest to the charging subsystem is found from all the above-mentioned generating sets through the shortest path algorithm, and the new generating set is connected to the grid.
[0053] Step S120 , with the goal of minimizing the adjusted amount of active power output of the generators, calculate the optimal output of each generator set in the entire charging system after the above-mentioned new generator sets are connect...
Embodiment 2
[0083]In order to test the scheme proposed by the embodiment of the present invention, a schematic diagram of a network of a generating set system using IEEE (Institute of Electrical and Electronics Engineers, Institute of Electrical and Electronics Engineers)-30 nodes provided by this embodiment is as follows figure 2 said, figure 2 It contains 30 nodes, 6 generators, 4 transformers and 37 transmission lines. The parameters of each generator node are shown in Table 1.
[0084] Table 1 IEEE-30 node system generator parameters
[0085]
[0086] Nodes 1, 2, 5, 8, 11 and 13 are generator nodes, and the corresponding generator numbers are 1, 2, 3, 4, 5 and 6; branches 4-12, 6-9, 6-10 and 27-28 are transformer branches, and other branches are transmission lines. Engine No. 1 at node 1 is used as the black start power supply, and the rest of the generators are the target generators. No. 1 generator is used as the black start power supply, and No. 2-6 generators are the targe...
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Abstract
The embodiment of the invention provides a calculation method for generator set output in electric system recovery. The calculation method for the generator set output in the electric system recovery mainly comprises the steps that aiming at the charging subsystem formed by recovered parts in power grids, a new generator set needing to be recovered closest to the charging subsystem is searched out based on a search algorithm, and the new generator set and the charging subsystem form the whole charging system; the whole charging system is started, the minimum regulating variable of the generator active output in the whole charging system is taken as the target, and optimal active output of each generator set in the whole charging system is calculated. The calculation method for the generator set output in the electric system recovery can effectively calculate the optimal active output of each generator set in the whole charging system, the regulating time can be shortened, and the total process of the electric system recovery is accelerated. The embodiment of the calculation method for the generator set output in the electric system recovery is simple in algorithm, and compared with a traditional method, the system recovery efficiency can be improved remarkably.
Description
technical field [0001] The invention relates to the technical field of electric power systems, in particular to a method for calculating the output of generating sets in the restoration of electric power systems. Background technique [0002] With the gradual realization of interregional interconnection and power market, the grid structure is becoming more and more complex. While the performance of the grid is improving, some new problems have also arisen. These problems cannot disappear with the application of new technologies. The power system blackout accident is a serious threat that must be faced, and the research on the power system recovery after the blackout is of great significance. If various recovery plans are prepared in advance and the recovery process is accelerated when the system is restored, the losses caused by disasters and accidents can be reduced to a minimum. [0003] The power outage recovery of the power system mainly includes three stages: unit reco...
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