CN102708286B - Ship load priority setting method based on analytic hierarchy process - Google Patents

Abstract

The invention provides a ship load priority setting method based on analytic hierarchy process. The method includes the steps: firstly, decomposing a decision problem into three hierarchies, wherein the topmost hierarchy is a target hierarchy, the intermediate hierarchy is a factor hierarchy, and the bottommost hierarchy is a scheme hierarchy; secondly, setting the harmonic content as F1, the start current as F2, the power factor as F3, the restart time as F4 and the rated power as F5, mutually comparing weights of F1,F2,F3,F4 and F5 with respect to the a load supposed to be unloaded, and constructing matrixes; checking uniformity of the matrixes according to a criterion of Cij Cjk=Cik (i, j, k=1, 2,...5); thirdly, solving the weight vector of each factor in a corresponding load according to the way in the step two; and fourthly, calculating 'feature score' of each load according to the following formula after weights of factors of hierarchies are obtained, setting 'feature score' of the load i as Ti, and calculating the priority score of the load Li according to the formula of Fi=WiTi. The ship load priority setting method based on analytic hierarchy process solves the problem of priority ranking of loads and provides basis for reasonable distribution of ship electric energy.

Description

Based on the boats and ships load priority level initializing method of analytical hierarchy process

Technical field

The present invention relates to boats and ships energy management technical field, specifically a kind of boats and ships load priority level initializing method based on analytical hierarchy process.

Background technology

Integrated power system boats and ships is sent out power supply to be integrated in a unified system with advancing electricity consumption, on-board equipment electricity consumption, thus realize generating, distribution and electric propulsion electricity consumption and miscellaneous equipment electricity consumption United Dispatching and centralized control.Integrated power system is a great-leap-forward development of modern ships power system, its main energetic form using " electric energy " as ship power system, the cooperation of each intermodule of system of emphasizing, the gordian technique of each module is studied by integrated thought, change traditional boats and ships are made up of power platform jointly general layout power system and electric system, represent the developing direction of ship power system.At present, the research of energy dispatching technique is also in the primary stage of requirement demonstration and concept discussion both at home and abroad, obtains the conclusion of some dispersions, do not form method and the theory of system.Load management function coordinates the interface between energy scheduling and concrete apparatus control system, reasonable distribution electric energy between various load, in case of emergency limiting bearing power or directly unloaded, preventing consumer from causing the adverse consequencess such as electric system overload when starting or run.The important parameter when priority of load is scheduling energy, energy scheduling feature trends towards by power distribution to the high load of priority, and the load that in case of emergency removal priority is low, to improve the overall efficiency of boats and ships.

At present, the domestic setting to boats and ships load priority mainly relies on the micro-judgment of decision maker, is theoretically unsound, and is quantized by the micro-judgment of decision maker, carries out reasonable set still belong to blank to boats and ships load priority.

Summary of the invention

The invention provides a kind of boats and ships load priority level initializing method based on analytical hierarchy process, the setting solving spot ship load priority mainly relies on the micro-judgment of decision maker, the problem be theoretically unsound.

Based on a boats and ships load priority level initializing method for analytical hierarchy process, comprise the steps:

(1) decision problem is decomposed into three levels: the superiors are destination layer, middle layer is factor layer, orlop is solution layer, wherein destination layer is decided to be " selecting the load that should unload ", solution layer is each load, and factor layer is harmonic content, starting is shoved, power factor, reboot time and rated power five factors;

(2) set harmonic content as F ₁, start shove as F ₂, power factor is F ₃, reboot time is F ₄, rated power is F ₅, its weight for " load that should unload " this target is compared mutually, and builds following matrix:

$C=\left[\begin{array}{ccccc}1& \frac{F_1}{F_2}& \frac{F_1}{F_3}& \frac{F_1}{F_4}& \frac{F_1}{F_5}\\ \frac{F_2}{F_1}& 1& \frac{F_2}{F_3}& \frac{F_2}{F_4}& \frac{F_2}{F_5}\\ \frac{F_3}{F_1}& \frac{F_3}{F_2}& 1& \frac{F_3}{F_4}& \frac{F_3}{F_5}\\ \frac{F_4}{F_1}& \frac{F_4}{F_2}& \frac{F_4}{F_3}& 1& \frac{F_4}{F_5}\\ \frac{F_5}{F_1}& \frac{F_5}{F_2}& \frac{F_5}{F_3}& \frac{F_5}{F_4}& 1\end{array}\right]$

Then C is utilized _ijc _jk=C _ik(i, j, k=1,2 ... 5) as criterion, consistency check is carried out to above-mentioned matrix, if be verified as consistent battle array, then according to the feature of consistent battle array, get in Matrix C and all can be used as weight vector V=[V after arbitrary column vector normalization ₁v ₂v ₃v ₄v ₅] ^t, wherein V ₁, V ₂, V ₃, V ₄, V ₅represent harmonic content respectively, start shove, power factor, reboot time and rated power is for the weight of " load that should unload " this target; If Matrix C is not consistency matrix, then solve its eigenvalue of maximum characteristic of correspondence vector as weight vector;

(3) according to the method in (2), the weight vector representing each factor weight in each load is tried to achieve respectively:

M ₁＝[M ₁₁M ₁₂M ₁₃... M _1i] ^T

M ₂＝[M ₂₁M ₂₂M ₂₃...M _2i] ^T

M ₃＝[M ₃₁M ₃₂M ₃₃... M _3i] ^T

M ₄＝[M ₄₁M ₄₂M ₄₃... M _4i] ^T

M ₅＝[M ₅₁M ₅₂M ₅₃... M _5i] ^T

Wherein M _kirepresent the relative weighting of a kth factor in load i, weight is larger, illustrates that this characteristic of this load is more obvious.

(4) after obtaining the weight of each layer factor, " the characteristic score " of each load is calculated according to the following formula, if " the characteristic score " of load i is T _i:

$T_i=\frac{1}{\underset{k=1}{\overset{5}{\mathrm{\Σ}}}{V}_k{M}_{\mathrm{ki}}}$

(5) computational load L according to the following formula _iright of priority score can be expressed as:

F _i＝W _iT _i

Wherein W _ifor load L _i" importance score "." can not unload " to obtain 5 points, " extremely important " obtains 4 points, and " important " obtains 3 points, and " generally important " obtains 2 points, and " can unload " obtains 1 point.F _ibe exactly load L _i" right of priority score ", can be ranked load priority accordingly, F _ihigher, priority is higher, F _ilower, priority is lower.

Application level analytic approach of the present invention, by harmonic wave factor, start shove, factor that start-up time, power factor (PF) are relevant with load priority with rated power five, calculate " the characteristic score " of each load, and then " characteristic score " is multiplied with " the importance score " of load, just obtain " the right of priority score " of load." right of priority score " is higher, and the priority of load is higher.The present invention proposes the load priority set algorithm based on analytical hierarchy process, solve the prioritization problem of load, for the reasonable distribution of boats and ships electric energy provides foundation.

Accompanying drawing explanation

Fig. 1 is the FB(flow block) of the boats and ships load priority level initializing method that the present invention is based on analytical hierarchy process;

Fig. 2 is the block diagram that the present invention uses stratification computational load " characteristic score ".

Embodiment

Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is clearly and completely described.

Now specifically calculate the priority level initializing problem of 10 loads.First the importance of load is divided into can not unload, extremely important, important, generally important, five grades can be unloaded, and to be respectively its score be 5 points, 4 points, 3 points, 2 points, 1 point, is listed as follows:

The importance score of table 1 load

Load	Importance score

Load L 1	5
		Load L 2	4
Load L 3	3
		Load L 4	1
Load L 5	4
		Load L 6	2
Load L 7	3
		Load L 8	1
Load L 9	2
		Load L 10	1

The following describes the process of " the characteristic score " calculating these 10 loads with analytical hierarchy process.

Please refer to Fig. 1 and Fig. 2, destination layer is decided to be " selecting the load that should unload ", and solution layer is each load, and factor layer is followed successively by harmonic content, starting is shoved, power factor, reboot time and rated power five factors.Successively the weight of each load characteristic for " load that should unload " this target is compared mutually, compares score with 1,3,5,7,9 respectively, obtain following matrix:

$C=\left[\begin{array}{ccccc}1& \frac{1}{3}& \frac{7}{5}& \frac{7}{3}& \frac{3}{9}\\ \frac{3}{1}& 1& \frac{3}{1}& \frac{5}{1}& \frac{9}{5}\\ \frac{5}{7}& \frac{1}{3}& 1& \frac{5}{7}& \frac{7}{3}\\ \frac{3}{7}& \frac{1}{5}& \frac{7}{5}& 1& \frac{5}{3}\\ \frac{9}{3}& \frac{5}{9}& \frac{3}{7}& \frac{3}{5}& 1\end{array}\right]$

Abbreviation obtains:

$C=\left[\begin{array}{ccccc}1& \frac{1}{3}& \frac{7}{5}& \frac{7}{3}& 3\\ 3& 1& 3& 5& \frac{9}{5}\\ \frac{5}{7}& \frac{1}{3}& 1& \frac{5}{7}& \frac{7}{3}\\ \frac{3}{7}& \frac{1}{5}& \frac{7}{5}& 1& \frac{5}{3}\\ 3& \frac{5}{9}& \frac{3}{7}& \frac{3}{5}& 1\end{array}\right]$

Be consistency matrix through checking above-mentioned matrix.

According to the feature of consistent battle array, to get in above-mentioned matrix after arbitrary column vector normalization as weight vector:

$V={\left[\begin{array}{ccccc}\frac{7}{57}& \frac{21}{57}& \frac{5}{57}& \frac{3}{57}& \frac{21}{57}\end{array}\right]}^T$

In formula element represent harmonic content successively, start shove, power factor, reboot time and rated power is for the weight of " load that should unload " this target.

According to same analytical hierarchy process, the weight vector representing the weight of each factor in each load can be tried to achieve respectively.

The weighing factor of harmonic content characteristic in each load:

$M_1={\left[\begin{array}{cccccccccc}\frac{7}{58}& \frac{3}{58}& \frac{5}{58}& \frac{3}{58}& \frac{9}{58}& \frac{5}{58}& \frac{9}{58}& \frac{7}{58}& \frac{3}{58}& \frac{7}{58}\end{array}\right]}^T$

Start the weighing factor of characteristic in each load that shove:

$M_2={\left[\begin{array}{cccccccccc}\frac{7}{35}& \frac{3}{35}& \frac{5}{35}& \frac{3}{35}& \frac{1}{35}& \frac{1}{35}& \frac{3}{35}& \frac{5}{35}& \frac{2}{35}& \frac{5}{35}\end{array}\right]}^T$

The weighing factor of power factor characteristic in each load:

$M_3={\left[\begin{array}{cccccccccc}\frac{3}{63}& \frac{7}{63}& \frac{21}{63}& \frac{1}{63}& \frac{3}{63}& \frac{1}{63}& \frac{9}{63}& \frac{15}{63}& \frac{1}{63}& \frac{2}{63}\end{array}\right]}^T$

The weighing factor of reboot time characteristic in each load:

$M_4={\left[\begin{array}{cccccccccc}\frac{13}{45}& \frac{7}{45}& \frac{7}{45}& \frac{1}{45}& \frac{1}{45}& \frac{5}{45}& \frac{3}{45}& \frac{5}{45}& \frac{3}{45}& \frac{1}{45}\end{array}\right]}^T$

The weighing factor of rated power characteristic in each load:

$M_5={\left[\begin{array}{cccccccccc}\frac{13}{52}& \frac{5}{52}& \frac{7}{52}& \frac{8}{52}& \frac{5}{52}& \frac{1}{52}& \frac{7}{52}& \frac{1}{52}& \frac{2}{52}& \frac{3}{52}\end{array}\right]}^T$

After obtaining each layer weight, computational load L ₁" characteristic score ":

$T_1=\frac{1}{\frac{7}{57}\×\frac{7}{58}+\frac{21}{57}\×\frac{7}{35}+\frac{5}{57}\×\frac{3}{63}+\frac{3}{57}\×\frac{13}{45}+\frac{21}{57}\×\frac{13}{52}}=3.65$

The characteristic score of other 9 loads can be calculated, then by load L according to same method ₁to load L ₁₀importance score and the list of characteristic score, the right of priority score of computational load, can obtain the priority of each load:

The priority of table 2 load

Load	Characteristic score T i	Importance score W i	Right of priority score F i	Priority
					Load L 1	3.65	5	18.25	2
Load L 2	4.12	4	16.48	4
					Load L 3	7.21	3	21.36	1
Load L 4	1.58	1	1.58	10
					Load L 5	3.65	4	14.6	5
Load L 6	5.53	2	11.06	6
					Load L 7	3.64	3	10.92	7
Load L 8	5.19	1	5.19	9
					Load L 9	8.31	2	16.62	3
Load L 10	9.54	1	9.54	8

Claims (1)

1., based on a boats and ships load priority level initializing method for analytical hierarchy process, it is characterized in that comprising the steps:

(1) decision problem is decomposed into three levels: the superiors are destination layer, middle layer is factor layer, orlop is solution layer, wherein destination layer is decided to be " selecting the load that should unload ", solution layer is each load, and factor layer is harmonic content, starting is shoved, power factor, reboot time and rated power five factors;

(2) set harmonic content as F ₁, start shove as F ₂, power factor is F ₃, reboot time is F ₄, rated power is F ₅, its weight for " load that should unload " this target is compared mutually, and builds following matrix:

$C=\begin{array}{}\left[\begin{array}{ccccc}1& \frac{F_1}{F_2}& \frac{F_1}{F_3}& \frac{F_1}{F_4}& \frac{F_1}{F_5}\\ \frac{F_2}{F_1}& 1& \frac{F_2}{F_3}& \frac{F_2}{F_4}& \frac{F_2}{F_5}\\ \frac{F_3}{F_1}& \frac{F_3}{F_2}& 1& \frac{F_3}{F_4}& \frac{F_3}{F_5}\\ \frac{F_4}{F_1}& \frac{F_4}{F_2}& \frac{F_4}{F_3}& 1& \frac{F_4}{F_5}\\ \frac{F_5}{F_1}& \frac{F_5}{F_2}& \frac{F_5}{F_3}& \frac{F_5}{F_4}& 1\end{array}\right]\end{array}$

Then C is utilized _ijc _jk=C _ik(i, j, k=1,2 ... 5) as criterion, consistency check is carried out to above-mentioned matrix, if be verified as consistent battle array, then according to the feature of consistent battle array, get in Matrix C and all can be used as weight vector V=[V after arbitrary column vector normalization ₁v ₂v ₃v ₄v ₅] ^t, wherein V ₁, V ₂, V ₃, V ₄, V ₅represent harmonic content respectively, start shove, power factor, reboot time and rated power is for the weight of " load that should unload " this target; If Matrix C is not consistency matrix, then solve its eigenvalue of maximum characteristic of correspondence vector as weight vector;

(3) according to the method in (2), the weight vector representing each factor weight in each load is tried to achieve respectively:

M ₁＝[M ₁₁M ₁₂M ₁₃... M _1i] ^T

M ₂＝[M ₂₁M ₂₂M ₂₃... M _2i] ^T

M ₃＝[M ₃₁M ₃₂M ₃₃... M _3i] ^T

M ₄＝[M ₄₁M ₄₂M ₄₃... M _4i] ^T

M ₅＝[M ₅₁M ₅₂M ₅₃... M _5i] ^T

Wherein M _kirepresent the relative weighting of a kth factor in load i, weight is larger, illustrates that this characteristic of this load is more obvious;

(4) after obtaining the weight of each layer factor, " the characteristic score " of each load is calculated according to the following formula, if " the characteristic score " of load i is T _i:

$T_i=\frac{1}{\underset{k=1}{\overset{5}{\mathrm{\Σ}}}{V}_k{M}_{\mathrm{ki}}}$

(5) computational load L according to the following formula _iright of priority score can be expressed as:

Y _i＝W _iT _i

Wherein W _ifor load L _i" importance score ".