CN107482622A - A kind of rack reconstruct efficiency calculation method in Power System Restoration Process - Google Patents
A kind of rack reconstruct efficiency calculation method in Power System Restoration Process Download PDFInfo
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- CN107482622A CN107482622A CN201710666964.3A CN201710666964A CN107482622A CN 107482622 A CN107482622 A CN 107482622A CN 201710666964 A CN201710666964 A CN 201710666964A CN 107482622 A CN107482622 A CN 107482622A
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- 238000004364 calculation method Methods 0.000 title claims abstract description 12
- 238000009825 accumulation Methods 0.000 claims abstract description 25
- 238000011084 recovery Methods 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000010606 normalization Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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Abstract
The present invention relates to the rack in a kind of Power System Restoration Process to reconstruct efficiency calculation method, and its technical characterstic is to include reading the electric power system data after having a power failure on a large scale, and calculates the accumulated generation capacity of side of generating set, recovers efficiency for evaluating unit；The accumulation economic loss of calculated load side, for evaluating load restoration efficiency；The accumulation economic loss of accumulated generation capacity and load side to side of generating set carries out standardization processing；Using it is linear plus and by the way of the accumulated generation capacity after standardization and accumulation economic loss are handled, the efficiency as rack reconstruct；According to the efficiency of different electric power rack reconfiguration scheme, suitable rack reconfiguration scheme is selected.The present invention is reasonable in design, and the evaluation of comprehensive and reasonable can be provided to different rack reconfiguration schemes, decision-making foundation is provided for power system recovery, so as to preferably instruct Power System Restoration Process.
Description
Technical field
The invention belongs to operation and control of electric power system technical field, the net in especially a kind of Power System Restoration Process
Frame reconstructs efficiency calculation method.
Background technology
Power system recovery after large-scale blackout is a very long and complicated process.According to main excellent in different times
Change the difference of object, system recovery procedure is generally divided into black starting-up, rack reconstruct and load restoration three phases.Wherein, net
Frame reconstruct plays a part of forming a connecting link in Power System Restoration Process, on the one hand needs arranged rational unit starting side
Formula, on the other hand it is also required to arranged rational load bus recovery order.
It is for the research of rack reconstruct, the mode of generally use part optimization that rack reconstruction is further thin
It is divided into the rack reconstruct towards unit starting and the rack towards load restoration reconstructs two extremely.For the net towards unit side
Frame reconstruction, existing method are critical with unit starting minimax generally to maximize system generating capacity as object function
Time is constraints, selects suitable restoration path to ensure that unit is restored in time.For the rack towards load side
Reconstruction, existing method mostly using the maximum benefit of recovering of system as object function, consider node synthesis importance,
Load synthesis importance in itself, node and the load factor such as power flow transfer distribution factor of load bus, determine that rack reconstructs
Scheme.The existing research to rack reconstruct is directed to single optimization object mostly, does not form the evaluation of rack reconstruct overall process
Method.
The content of the invention
It is overcome the deficiencies in the prior art the mesh of the present invention, proposes a kind of reasonable in design and accurate power train of evaluation
Rack reconstruct efficiency calculation method in recovery process of uniting.
The present invention solves its technical problem and takes following technical scheme to realize：
A kind of rack reconstruct efficiency calculation method in Power System Restoration Process, comprises the following steps：
Step 1, the electric power system data after having a power failure on a large scale is read, include the status information of generating set, path and load；
Step 2, for power system rack reconfiguration scheme, the accumulated generation capacity of side of generating set is calculated, for evaluating
Unit recovers efficiency；
Step 3, for power system rack reconfiguration scheme, the accumulation economic loss of calculated load side, for evaluating load
Recover efficiency；
Step 4, standardization processing is carried out to the accumulated generation capacity of side of generating set and the accumulation economic loss of load side；
Step 5, using it is linear plus and by the way of to the accumulated generation capacity after standardization and accumulation economic loss at
Reason, the efficiency as rack reconstruct；
Step 6, the efficiency according to different electric power rack reconfiguration scheme, select suitable rack reconfiguration scheme.
The accumulated generation capacity of side of generating set is calculated as follows in the step 2：
Wherein, T is given system recovery time, nGTo be activated the quantity of unit, PGi(t) it is unit GiIn t
Active power output.
The accumulation economic loss of load side is calculated as follows in the step 3：
Wherein, TsiThe time to be restored electricity for node Li, PLi(t) it is node LiIn the load of t, CLi(t) it is section
Point LiLost in the unit-economy of t.
When the step 4 carries out standardization processing, it is by the accumulated generation capacity normalization value of unit side：
Wherein, f1maxAnd f1minThe respectively maximum and minimum value of the accumulated generation capacity of unit side；
It is by the accumulation economic loss normalization value of load side：
Wherein：f2maxAnd f2minThe respectively maximum and minimum value of load accumulation economic loss.
The step 5 defines the efficiency of rack reconstruct using linear weighted function and method, represents as follows：
Wherein：ω1, ω2For weight coefficient, weight coefficient meets ω1+ω2=1 constraint.
The advantages and positive effects of the present invention are：
The present invention has considered the factor of " source-lotus " two aspects in Power System Restoration Process, passes through to calculate and generates electricity
The accumulated generation capacity of unit side recovers efficiency to evaluate unit, by the accumulation economic loss of calculated load side to evaluate load
Recover efficiency；Using it is linear plus and by the way of processing carried out to accumulated generation capacity and accumulation economic loss be used to evaluate different nets
The efficiency of frame reconstruct simultaneously selects suitable rack reconfiguration scheme, and the present invention can provide comprehensively to different rack reconfiguration schemes
Rational evaluation, provides decision-making foundation, so as to preferably instruct Power System Restoration Process for power system recovery.
Brief description of the drawings
The generator output characteristic curve of Fig. 1 present invention；
The node economic loss curve of the period of having a power failure on a large scale of Fig. 2 present invention；
Fig. 3 is IEEE30 node schematic diagrames.
Embodiment
The embodiment of the present invention is further described below in conjunction with accompanying drawing.
A kind of rack reconstructing method efficiency calculation in Power System Restoration Process, comprises the following steps：
Step 1, reading have a power failure on a large scale after electric power system data, comprising generating set, path, load status information.
Step 2, for power system rack reconfiguration scheme, the accumulated generation capacity of side of generating set is calculated, for evaluating
Unit recovers efficiency.
Generator output characteristic in Power System Restoration Process is the process of a time-varying, the generating of system recovery procedure
Machine power curve is as shown in Figure 1.The present invention combines the power producing characteristics curve of generator, and the accumulation of side of generating set is calculated as follows
Generating capacity：
Wherein, T is given system recovery time, nGTo be activated the quantity of unit, PGi(t) it is unit GiIn t
Active power output.
Step 3, for power system rack reconfiguration scheme, the accumulation economic loss of calculated load side, for evaluating load
Recover efficiency.
After large-scale blackout, the economic loss of load bus is related to power off time, and the economic loss of each node has
Institute is different, and the node economic loss curve during having a power failure on a large scale is represented using piecewise linear function as shown in Figure 2.The present invention combines
Node economic loss curve during having a power failure on a large scale, the accumulation economic loss of load side is calculated as follows：
Wherein, TsiThe time to be restored electricity for node Li, PLi(t) it is node LiIn the load of t, CLi(t) it is section
Point LiLost in the unit-economy of t.
Step 4, standardization processing is carried out to the accumulated generation capacity of side of generating set and the accumulation economic loss of load side.
For convenience of the integrated treatment to unit recovery efficiency and load restoration efficiency, it is also necessary to carry out normalizing to evaluation index
Change is handled.The accumulated generation capacity of unit side is income type index, and its normalization value is：
Wherein：f1maxAnd f1minThe respectively maximum and minimum value of the accumulated generation capacity of unit side.
The accumulation economic loss of load side is cost type index, and its normalization value is：
Wherein：f2maxAnd f2minThe respectively maximum and minimum value of load accumulation economic loss.
Step 5, using it is linear plus and by the way of to the accumulated generation capacity after standardization and accumulation economic loss at
Reason, the efficiency as rack reconstruct.
The present invention defines the efficiency of rack reconstruct using linear weighted function and method, can be expressed as：
Wherein：ω1, ω2For weight coefficient, weight coefficient meets ω1+ω2=1 constraint.
Step 6, the efficiency according to different electric power rack reconfiguration scheme, select suitable rack reconfiguration scheme.
Below using the IEEE30 node systems shown in Fig. 3 as example, illustrate the validity of institute's extracting method of the present invention.
By the way of system partitioning recovery, 30 nodes are divided into the unit difference of two subregions of A, B, node 1 and node 2
For the black starting-up power supply in subregion A and subregion B.Assuming that needed in whole system the destination node that recovers first for machine group node [13,
22,23,27] and load bus [7,12,17,30], wherein unit and load data are as shown in table 1 below and table 2：
The unit data of table 1
| Node | PN/MW | rp/(MW/h) |
| 13 | 40 | 25 |
| 22 | 60 | 30 |
| 23 | 30 | 15 |
| 27 | 40 | 20 |
The load data of table 2
| Node | PL/MW | c1/h | k1(ten thousand yuan/MW/h) | c2/h | k2(ten thousand yuan/MW/h) |
| 7 | 10.1 | 0 | 0 | 1.0 | 20 |
| 12 | 8.8 | 0.4 | 10 | 1.0 | 30 |
| 17 | 5.2 | 0.6 | 15 | 1.0 | 25 |
| 30 | 6.3 | 0.2 | 30 | 1.0 | 20 |
Five groups of feasible system recovery schemes of generation at random, as shown in table 3：
The system recovery scheme of table 3
| Sequence number | Subregion A recovery schemes | Subregion B recovery schemes |
| 1 | 12,13,23,22 | 27,30,17,7 |
| 2 | 12,13,17,22,23 | 27,7,30 |
| 3 | 12,13,23 | 27,30,7,22,17 |
| 4 | 12,13,23,27,30 | 22,7,17 |
| 5 | 12,13,17,23 | 22,27,30,7 |
The method proposed using this patent is calculated, and the result drawn is as shown in table 4：
The rack of table 4 reconstructs efficiency
As can be seen from Table 4, scheme 3 has the accumulated generation capacity and less load accumulation warp of larger unit side
Ji loss, so as to higher rack reconstruct efficiency.
Shown by examples detailed above, institute's extracting method of the present invention can be to the rack reconfiguration scheme in Power System Restoration Process
Rational evaluation is made, decision-making foundation is provided for power system recovery.
It is emphasized that embodiment of the present invention is illustrative, rather than it is limited, therefore present invention bag
Include and be not limited to embodiment described in embodiment, it is every by those skilled in the art's technique according to the invention scheme
The other embodiment drawn, also belongs to the scope of protection of the invention.
Claims (5)
1. a kind of rack reconstruct efficiency calculation method in Power System Restoration Process, it is characterised in that comprise the following steps：
Step 1, the electric power system data after having a power failure on a large scale is read, include the status information of generating set, path and load；
Step 2, for power system rack reconfiguration scheme, the accumulated generation capacity of side of generating set is calculated, for evaluating unit
Recover efficiency；
Step 3, for power system rack reconfiguration scheme, the accumulation economic loss of calculated load side, for evaluating load restoration
Efficiency；
Step 4, standardization processing is carried out to the accumulated generation capacity of side of generating set and the accumulation economic loss of load side；
Step 5, using it is linear plus and by the way of the accumulated generation capacity after standardization and accumulation economic loss are handled, make
For the efficiency of rack reconstruct；
Step 6, the efficiency according to different electric power rack reconfiguration scheme, select suitable rack reconfiguration scheme.
2. the rack reconstruct efficiency calculation method in a kind of Power System Restoration Process according to claim 1, its feature
It is：The accumulated generation capacity of side of generating set is calculated as follows in the step 2：
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3. the rack reconstruct efficiency calculation method in a kind of Power System Restoration Process according to claim 1, its feature
It is：The accumulation economic loss of load side is calculated as follows in the step 3：
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4. the rack reconstruct efficiency calculation method in a kind of Power System Restoration Process according to claim 1, its feature
It is：When the step 4 carries out standardization processing, it is by the accumulated generation capacity normalization value of unit side：
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5. the rack reconstruct efficiency calculation method in a kind of Power System Restoration Process according to claim 1, its feature
It is：The step 5 defines the efficiency of rack reconstruct using linear weighted function and method, represents as follows：
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Cited By (1)
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