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Power management unit (PMU) optical configuration method for ship electrical power system based on direct solvable power flow

A technology of power system and tidal current equation, applied in the direction of circuit device, AC network circuit, system integration technology, etc., can solve the problems that cannot adapt to the change of ship power system network structure and tidal current equation, etc., and achieve easy realization, simple expression, high The effect of rationality and flexibility

Inactive Publication Date: 2012-09-12
NAVAL UNIV OF ENG PLA
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Problems solved by technology

[0005] However, the current research usually focuses on realizing the direct solution of the power flow of the entire land power grid, which cannot adapt to the change of the network structure and power flow equation of the ship power system when it is in different operating conditions due to different missions.
At present, there are few reports on the optimal configuration method of PMU based on the characteristics of the ship power system.

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  • Power management unit (PMU) optical configuration method for ship electrical power system based on direct solvable power flow
  • Power management unit (PMU) optical configuration method for ship electrical power system based on direct solvable power flow
  • Power management unit (PMU) optical configuration method for ship electrical power system based on direct solvable power flow

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Embodiment Construction

[0030] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0031] Ship power system such as figure 1 As shown, the node correlation matrix of different operating conditions of the system is as follows figure 2 as shown, image 3 A strong subgraph for the system. Node 1 is a balanced node. The parameters of the quantum genetic algorithm are: the population size is 10, the quantum chromosome length is 15, the initial measurement number K is 6, the rotation adjustment angle step is 0.01*π, and the cross adjustment angle step is 0.04* π, the maximum evolution algebra is 600. The model of the objective function and constraint conditions is established according to the specific implementation plan, and the quantum genetic algorithm is used to optimize the solution, and a series of Pareto optimal solutions that can comprehensively realize the two goals of minimizi...

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Abstract

A PMU optical configuration method for a ship electrical power system based on direct solvable power flow includes step a, obtaining power flow equations and node incidence matrixes under different working conditions; step b, describing features of the power flow equations by using system node incidence matrixes; step c, determining a power flow equation of the ship electrical power system under a certain working condition and whether a PMU configuration scheme satisfies direct solvable power flow; step d, determining whether the PMU configuration scheme satisfies direct solvable power flow under different working conditions on the basis of the step c; step e, defining N-1 voltage phasor solvable redundancy by using an N-1 measurement redundancy analysis principle for reference; step f, enabling the number of the PMU configuration to be as small as possible and the number of N-1 voltage phasor solvable redundancy nodes to be maximum under the maximum operating condition and under the guarantee of satisfying direct solvable power flow equations under different working conditions; and step g, rapidly searching a Pareto-optimal solution of multiple objective functions in the whole solution space by utilizing the global optimization capacity of a quantum genetic algorithm.

Description

technical field [0001] The invention relates to the field of system analysis of an independent electric power system, in particular to a PMU optimal configuration method of a ship electric power system based on a directly solvable power flow. Background technique [0002] The power flow calculation is used to analyze the section of the ship power system at a certain time, the value of each state variable of the system and the power distribution in the system, and the calculation results provide initial conditions and judgment basis for the intelligent protection of the system. Conventional power flow calculation methods such as the Newton-Raphson method and fast decoupling methods are not easy to converge, but the ship power system is similar to the power distribution network of the land power system. Therefore, the power flow calculation method of the land power distribution network can be used for reference. Trend analysis. The methods that can be used are: back-push-forw...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCY02E40/70Y02E60/00Y04S10/00Y04S10/22
Inventor 夏立王家林卜乐平邵英王征
Owner NAVAL UNIV OF ENG PLA
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