CN109672225A - The Automatic Control Strategy of 220kV transformer overload is eliminated in a kind of adjustment - Google Patents
The Automatic Control Strategy of 220kV transformer overload is eliminated in a kind of adjustment Download PDFInfo
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- CN109672225A CN109672225A CN201811488682.XA CN201811488682A CN109672225A CN 109672225 A CN109672225 A CN 109672225A CN 201811488682 A CN201811488682 A CN 201811488682A CN 109672225 A CN109672225 A CN 109672225A
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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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
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
-
- 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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
Abstract
The present invention relates to the Automatic Control Strategies that 220kV transformer overload is eliminated in a kind of adjustment, comprising the following steps: in transformer TiWhen overloading Δ L, load load1, load2, load3, load4 of low pressure catch-all QF1, QF2, QF3, QF4 are transferred to an other transformer T by the adjustment of mesolow side formulaj, and transformer T at this timejCapacity Margin is that load load1, load2 of M low pressure catch-all QF1, QF2 are transferred to transformer T by the adjustment of mesolow side formulaj, and transformer T at this timejCapacity Margin is M1；Load load3, load4 of low pressure catch-all QF3, QF4 are transferred to transformer T by the adjustment of mesolow side formulan, and T at this timenCapacity Margin is M2.The present invention has rational design, the possibility load transfer case being likely to occur when considering 220kV transformer overload in actual motion comprehensively, can automatic, quickly, quantitatively generate in elimination 220kV transformer overload, the policy information of low-pressure side transfer load.
Description
Technical field
The invention belongs to transformer technology field, the automatic control of 220kV transformer overload is eliminated in especially a kind of adjustment
Strategy.
Background technique
When 220kV transformer overload, dispatcher should take relevant operation in time, by adjusting in transformer, it is low
It presses side formula to eliminate apparatus overload, otherwise will lead to transformer damage, expand accident impact.
Dispatcher generally carries out manually ordering to operate according to operating experience at present, which automation and intelligent level
It is lower, the mode adjustable strategies of this respect can be still automatically provided without related system or application, therefore there is an urgent need to a kind of quick
The automatic aid decision-making method of eliminating transformer overload.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, propose that 220kV transformer overload is eliminated in a kind of adjustment
Automatic Control Strategy can reduce or eliminate overload and damage to equipment bring, improve the automation and intelligence of dispatcher's work
Change level, and then promotes the ability controlled operation of power networks.
The present invention solves its technical problem and adopts the following technical solutions to achieve:
The Automatic Control Strategy of 220kV transformer overload is eliminated in a kind of adjustment, comprising the following steps:
Step 1, in transformer TiWhen overloading Δ L, the load load1 of low pressure catch-all QF1, QF2, QF3, QF4,
Load2, load3, load4 are transferred to an other transformer T by the adjustment of mesolow side formulaj, and transformer T at this timejCapacity
Nargin is M；
Step 2, low pressure catch-all QF1, QF2 load load1, load2 by mesolow side formula adjustment be transferred to
Transformer Tj, and transformer T at this timejCapacity Margin is M1；During load load3, load4 of low pressure catch-all QF3, QF4 pass through
Low-pressure side mode, which adjusts, is transferred to transformer Tn, and T at this timenCapacity Margin is M2。
Further, the step 1 concrete methods of realizing the following steps are included:
(1) set: 0≤load1≤load2≤load3≤load4 is calculated from transformer TiMesolow side transfer load is extremely
TjFollowing all possible numerical value: load1, load2, load3, load4, load1+load2, load1+load3, load1+
load4、load2+load3、load2+load4、load3+load4、load1+load2+load3、load1+load2+
Load4, load1+load3+load4, load2+load3+load4 and load1+load2+load3+load4, by above-mentioned 15
Numerical value respectively corresponds a kind of mode of mesolow side transfer load；Above-mentioned 15 numerical value is pressed into ascending sequence are as follows: 0≤L1
≤L2≤L3≤…≤L14≤L15, and then 16 numerical intervals are formd, are as follows: [L0,L1),[L1,L2)…[L14,L15),[L15,
L16), wherein L0=0, L16=∞；
(2) the calculated result according to step (1), if M is located at [L0,L1) numerical intervals, transformer TjCapacity Margin M can not
Meet any load method；
(3) the calculated result according to step (1), if M is located at [Li,Li+1) numerical intervals, i ∈ 1,2 ... 15, further investigation
[L0,L1),[L1,L2)…[Li-1,Li) numerical intervals and TiThe relationship of overload quantity Δ L: if 1. Δ L is located at [Lk,Lk+1) numerical value area
Between, k ∈ 0,1,2 ... i-1 then presses Lk+1Mode in corresponding load transfer method adaptation stations, and start the progress of Load flow calculation module
Verification；2. if Δ L >=Li, then L is pressediMode in corresponding load transfer method adaptation stations, and start Load flow calculation module and carry out school
It tests.
Further, the Load flow calculation is the operation item according to given electric network composition, parameter and generator, load cell
Part determines the calculating of electric system each section steady-state operating condition parameter；The service condition includes each power supply and negative in system
Power, pivot point voltage, the voltage of equalization point and the phase angle of lotus point.
Further, the step 2 concrete methods of realizing the following steps are included:
(1) set: 0≤load1≤load2,0≤load3≤load4 are calculated from transformer TiMesolow side transfer load
To transformer TjFirst group of 3 numerical value: load1, load2, load1+load2, first group of 3 numerical value respectively correspond one kind
From TiMesolow side transfer load is to TjMode；It is calculated again from TiMesolow side transfer load is to TnSecond group of 3 numerical value:
Load3, load4, load3+load4, second group of 3 numerical value respectively correspond a kind of from TiMesolow side transfer load is to Tn's
Mode；Above-mentioned two groups of numerical value is pressed into ascending sequence: 0≤L respectively1≤L2≤L3, 0≤H1≤H2≤H3, by above-mentioned two component
It Xing Cheng 3 numerical intervals: [L0,L1),[L1,L2),[L2,L3),[L3,L4)；[H0,H1),[H1,H2),[H2,H3),[H3,H4),
Wherein L0=H0=0, L4=H4=∞；Create null set S1{}、S2{}、S3{}；
(2) according to step calculated result (1): if 1. M1Positioned at [L0,L1) numerical intervals, TjCapacity Margin M1It is unable to satisfy
Any load method；2. if M1Positioned at [Li,Li+1) numerical intervals, (1,2 ... 3), by L by i ∈1,…LiSet S is written1, it is S1
{L1,…Li}；
(3) according to step calculated result (1): if 1. M2Positioned at [H0,H1) numerical intervals, TnCapacity Margin M2It is unable to satisfy
Any load method；2. if M2Positioned at [Hk,Hk+1) numerical intervals, (1,2 ... 3), by H by k ∈1,…HkSet S is written2, it is S2
{H1,…Hk}；
(4) the calculated result according to step (2), (3), by S1And S2S is written in the element of set3, and by S1Middle either element and S2
S is also written in the sum of middle either element3, have: if 1. S3Still it is null set, shows in station without any really feasible mesolow side
The mode of transfer load；2. if S3It is at this time nonempty set S3{G1,,…GfForm, wherein f ∈ (i, k, i+k+i*k), collection
Close S3In each element respectively correspond it is a kind of from TiMesolow side load is transferred to Tj、TnCombined method, by S3In own
Element presses ascending sequence, 0≤G1≤G2≤…≤Gf, and then form f numerical intervals, [G0,G1),[G1,G2)…
[Gf-1,Gf), wherein G0=0；
(5) the calculated result according to step (4) investigates [G0,G1),[G1,G2)…[Gf-1,Gf) numerical intervals and TiOverload quantity
The relationship of Δ L: if 1. Δ L is located at [Gp,Gp+1) numerical intervals, k ∈ (0,1,2 ... f-1), by Gp+1The group of corresponding transfer load
Mode in conjunction method adaptation stations, and start Load flow calculation module and verified；2. if Δ L >=Gf, by GfCorresponding transfer load
Mode in combined method adaptation stations, and start Load flow calculation module and verified.
The advantages and positive effects of the present invention are:
1, the present invention by 220kV transformer, low-pressure side mode adjust eliminating transformer overload, with 220kV transformation
It is that model considers in actual motion comprehensively suitable for common all kinds of 220kV transformer connection forms that device, which leads to the suitable mode of connection,
The possibility load transfer case being likely to occur when 220kV transformer overload automatic, quickly, quantitatively can generate elimination 220kV and become
In depressor overload, the policy information of low-pressure side transfer load.
2, the present invention is based on logical suitable 220kV transformer connection forms to establish analysis model, therefore applicability is very extensive,
All kinds of overload faults of processing 220kV transformer can be analyzed.
3, the present invention is based on the Capacity Margin for considering related transformer in standing when real-time topology generating mode adjustable strategies, amounts
The load of transfer is changed, it is ensured that assist correctness, the exploitativeness of strategy.
Detailed description of the invention
Fig. 1 is 220kV transformer Universal connection schematic diagram.
Specific embodiment
The embodiment of the present invention is further described below in conjunction with attached drawing.
The present invention considers transformer TiThe case where when overload Δ L, low pressure catch-all QF1, QF2, QF3, QF4's is negative at this time
Lotus distinguishes load1, load2, load3, load4, as shown in Figure 1, if transformer TiWithout to inductive switch, corresponding load is taken as 0
Processing.To eliminate TiOverload, prepares for mother or block switch that mesolow side is incorporated into hot stand-by duty, pulls open TiIt is corresponding by
The adjustable strategies of falling load method of master switch.Topology identification, works as T in being stoodiThe load of certain side can not pass through mesolow side formula
Corresponding load when any other transformer, is taken as 0 processing down in standing by adjustment.It is divided into following two kinds of situations to be handled；
1, load load1, load2, load3, load4 can be adjusted by mesolow side formula and be transferred to an other change
Depressor Tj, and T at this timejCapacity Margin is M.Without loss of generality it is assumed that 0≤load1≤load2≤load3≤load4.
(1) it calculates from TiMesolow side transfer load is to TjAll possible numerical value, are as follows: load1, load2, load3,
load4、load1+load2、load1+load3、load1+load4、load2+load3、load2+load4、load3+
load4、load1+load2+load3、load1+load2+load4、load1+load3+load4、load2+load3+
Load4, load1+load2+load3+load4, this 15 numerical value respectively correspond a kind of mode of mesolow side transfer load.
Above-mentioned 15 numerical value is pressed into ascending sequence, is written as: 0≤L1≤L2≤L3≤…≤L14≤L15(wherein LiRespectively correspond 15
One in numerical value), and then 16 numerical intervals are formd, are as follows: [L0,L1),[L1,L2)…[L14,L15),[L15,L16), wherein
L0=0, L16=∞.
(2) calculated result according to step (1), if M is located at [L0,L1) numerical intervals, TjCapacity Margin M be unable to satisfy
Any load method；
(3) calculated result according to step (1), if M is located at [Li,Li+1) numerical intervals, (1,2 ... 15), further by i ∈
Investigate [L0,L1),[L1,L2)…[Li-1,Li) numerical intervals and TiThe relationship of overload quantity Δ L: if 1. Δ L is located at [Lk,Lk+1) number
It is worth section, k ∈ (0,1,2 ... i-1), by Lk+1Mode in corresponding load transfer method adaptation stations, and start Load flow calculation module
It is verified；2. if Δ L >=Li, by LiMode in corresponding load transfer method adaptation stations, and start the progress of Load flow calculation module
Verification.
Load flow calculation module is the common module in power network dispatching system.Load flow calculation be according to given electric network composition,
The service condition of the elements such as parameter and generator, load determines the calculating of electric system each section steady-state operating condition parameter.It is logical
Often given service condition has each power supply and the power of load point, pivot point voltage, the voltage of equalization point and phase angle in system
Deng.
2, load load1, load2 can be adjusted by mesolow side formula and be transferred to transformer Tj, and T at this timejCapacity Margin
For M1；Load load3, load4 are transferred to transformer T by the adjustment of mesolow side formulan, and T at this timenCapacity Margin is M2.No
It loses general it is assumed that 0≤load1≤load2,0≤load3≤load4.
(1) it calculates from TiMesolow side transfer load is to TjAll possible numerical value, are as follows: load1, load2, load1+
Load2, first group this 3 numerical value respectively correspond a kind of from TiMesolow side transfer load is to TjMode；It is calculated again from Ti
Mesolow side transfer load is to TnAll possible numerical value, are as follows: load3, load4, load3+load4, second group this 3 numbers
Value respectively corresponds a kind of from TiMesolow side transfer load is to TnMode.Above-mentioned two groups of numerical value is pressed into ascending row respectively
Sequence is written as: 0≤L1≤L2≤L3(wherein LiRespectively correspond one in first group of numerical value), 0≤H1≤H2≤H3(wherein HiRespectively
One in corresponding second group of numerical value).Above-mentioned two groups can form respectively 3 numerical intervals: [L0,L1),[L1,L2),[L2,
L3),[L3,L4)；[H0,H1),[H1,H2),[H2,H3),[H3,H4), wherein L0=H0=0, L4=H4=∞.In addition, creation empty set
Close S1{}、S2{}、S3{}。
(2) calculated result according to step (1): if 1. M1Positioned at [L0,L1) numerical intervals, TjCapacity Margin M1It can not expire
Any load method of foot；2. if M1Positioned at [Li,Li+1) numerical intervals, (1,2 ... 3), by L by i ∈1,…LiSet S is written1, it is
S1{L1,…Li}。
(3) calculated result according to step (1): if 1. M2Positioned at [H0,H1) numerical intervals, TnCapacity Margin M2It can not expire
Any load method of foot；2. if M2Positioned at [Hk,Hk+1) numerical intervals, (1,2 ... 3), by H by k ∈1,…HkSet S is written2, it is
S2{H1,…Hk}。
(4) calculated result according to step (2), (3), by S1And S2S is written in the element of set3, and by S1Middle either element
With S2S is also written in the sum of middle either element3, have: if 1. S3Still be null set, show station in without it is any really it is feasible in it is low
Press the mode of side transfer load；2. if S3It is at this time nonempty set S3{G1,,…GfForm, wherein f ∈ (i, k, i+k+i*
K), set S3In each element respectively correspond it is a kind of from TiMesolow side load is transferred to Tj、TnCombined method, by S3In
All elements press ascending sequence, are not general it is assumed that 0≤G1≤G2≤…≤Gf, and then form f numerical value area
Between, [G0,G1),[G1,G2)…[Gf-1,Gf), wherein G0=0.
(5) calculated result according to step (4) investigates [G0,G1),[G1,G2)…[Gf-1,Gf) numerical intervals and TiOverload
Measure the relationship of Δ L: if 1. Δ L is located at [Gp,Gp+1) numerical intervals, k ∈ (0,1,2 ... f-1), by Gp+1Corresponding transfer load
Mode in combined method adaptation stations, and start Load flow calculation module and verified；2. if Δ L >=Gf, by GfCorresponding transfer load
Combined method adaptation stations in mode, and start Load flow calculation module and verified.
It is emphasized that embodiment of the present invention be it is illustrative, without being restrictive, therefore packet of the present invention
Include and be not limited to embodiment described in specific embodiment, it is all by those skilled in the art according to the technique and scheme of the present invention
The other embodiments obtained, also belong to the scope of protection of the invention.
Claims (4)
1. the Automatic Control Strategy that 220kV transformer overload is eliminated in a kind of adjustment, it is characterised in that the following steps are included:
Step 1, in transformer TiWhen overloading Δ L, load load1, load2 of low pressure catch-all QF1, QF2, QF3, QF4,
Load3, load4 are transferred to an other transformer T by the adjustment of mesolow side formulaj, and transformer T at this timejCapacity Margin is
M；
Step 2, low pressure catch-all QF1, QF2 load load1, load2 by mesolow side formula adjustment be transferred to transformation
Device Tj, and transformer T at this timejCapacity Margin is M1；Load load3, load4 of low pressure catch-all QF3, QF4 pass through mesolow
Formula adjustment in side is transferred to transformer Tn, and T at this timenCapacity Margin is M2。
2. the Automatic Control Strategy of 220kV transformer overload is eliminated in a kind of adjustment according to claim 1, feature exists
In: the step 1 concrete methods of realizing the following steps are included:
(1) set: 0≤load1≤load2≤load3≤load4 is calculated from transformer TiMesolow side transfer load is to Tj's
Following all possible numerical value: load1, load2, load3, load4, load1+load2, load1+load3, load1+load4,
load2+load3、load2+load4、load3+load4、load1+load2+load3、load1+load2+load4、load1
+ load3+load4, load2+load3+load4 and load1+load2+load3+load4 are right respectively by above-mentioned 15 numerical value
Answer a kind of mode of mesolow side transfer load；Above-mentioned 15 numerical value is pressed into ascending sequence are as follows: 0≤L1≤L2≤L3
≤…≤L14≤L15, and then 16 numerical intervals are formd, are as follows: [L0,L1),[L1,L2)…[L14,L15),[L15,L16), wherein
L0=0, L16=∞；
(2) the calculated result according to step (1), if M is located at [L0,L1) numerical intervals, transformer TjCapacity Margin M be unable to satisfy
Any load method；
(3) the calculated result according to step (1), if M is located at [Li,Li+1) numerical intervals, i ∈ 1,2 ... 15, further investigation [L0,
L1),[L1,L2)…[Li-1,Li) numerical intervals and TiThe relationship of overload quantity Δ L: if 1. Δ L is located at [Lk,Lk+1) numerical intervals, k
∈ 0,1,2 ... i-1 then presses Lk+1Mode in corresponding load transfer method adaptation stations, and start Load flow calculation module and carry out school
It tests；2. if Δ L >=Li, then L is pressediMode in corresponding load transfer method adaptation stations, and start Load flow calculation module and carry out school
It tests.
3. the Automatic Control Strategy of 220kV transformer overload is eliminated in a kind of adjustment according to claim 2, feature exists
In: the Load flow calculation is to determine electric power according to the service condition of given electric network composition, parameter and generator, load cell
The calculating of system components steady-state operating condition parameter；The service condition include each power supply and the power of load point in system,
Pivot point voltage, the voltage of equalization point and phase angle.
4. the Automatic Control Strategy of 220kV transformer overload is eliminated in a kind of adjustment according to claim 1, feature exists
In: the step 2 concrete methods of realizing the following steps are included:
(1) set: 0≤load1≤load2,0≤load3≤load4 are calculated from transformer TiMesolow side transfer load extremely becomes
Depressor TjFirst group of 3 numerical value: load1, load2, load1+load2, first group of 3 numerical value respectively correspond a kind of from Ti
Mesolow side transfer load is to TjMode；It is calculated again from TiMesolow side transfer load is to TnSecond group of 3 numerical value:
Load3, load4, load3+load4, second group of 3 numerical value respectively correspond a kind of from TiMesolow side transfer load is to Tn's
Mode；Above-mentioned two groups of numerical value is pressed into ascending sequence: 0≤L respectively1≤L2≤L3, 0≤H1≤H2≤H3, by above-mentioned two component
It Xing Cheng 3 numerical intervals: [L0,L1),[L1,L2),[L2,L3),[L3,L4)；[H0,H1),[H1,H2),[H2,H3),[H3,H4),
Wherein L0=H0=0, L4=H4=∞；Create null set S1{}、S2{}、S3{}；
(2) according to step calculated result (1): if 1. M1Positioned at [L0,L1) numerical intervals, TjCapacity Margin M1It is unable to satisfy any
Load method；2. if M1Positioned at [Li,Li+1) numerical intervals, (1,2 ... 3), by L by i ∈1,…LiSet S is written1, it is S1
{L1,…Li}；
(3) according to step calculated result (1): if 1. M2Positioned at [H0,H1) numerical intervals, TnCapacity Margin M2It is unable to satisfy any
Load method；2. if M2Positioned at [Hk,Hk+1) numerical intervals, (1,2 ... 3), by H by k ∈1,…HkSet S is written2, it is S2
{H1,…Hk}；
(4) the calculated result according to step (2), (3), by S1And S2S is written in the element of set3, and by S1Middle either element and S2In appoint
S is also written in the sum of one element3, have: if 1. S3Still it is null set, shows in station without any really feasible mesolow side transfer
The mode of load；2. if S3It is at this time nonempty set S3{G1,,…GfForm, wherein f ∈ (i, k, i+k+i*k), set S3In
Each element respectively correspond it is a kind of from TiMesolow side load is transferred to Tj、TnCombined method, by S3Middle all elements are pressed
Ascending sequence, 0≤G1≤G2≤…≤Gf, and then form f numerical intervals, [G0,G1),[G1,G2)…[Gf-1,Gf),
Wherein G0=0；
(5) the calculated result according to step (4) investigates [G0,G1),[G1,G2)…[Gf-1,Gf) numerical intervals and TiOverload quantity Δ L's
Relationship: if 1. Δ L is located at [Gp,Gp+1) numerical intervals, k ∈ (0,1,2 ... f-1), by Gp+1The combination side of corresponding transfer load
Mode in method adaptation stations, and start Load flow calculation module and verified；2. if Δ L >=Gf, by GfThe combination of corresponding transfer load
Mode in method adaptation stations, and start Load flow calculation module and verified.
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