CN107565561A - Closed loop network load simulation method based on closed loop power flow optimization analysis - Google Patents
Closed loop network load simulation method based on closed loop power flow optimization analysis Download PDFInfo
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- CN107565561A CN107565561A CN201710945275.6A CN201710945275A CN107565561A CN 107565561 A CN107565561 A CN 107565561A CN 201710945275 A CN201710945275 A CN 201710945275A CN 107565561 A CN107565561 A CN 107565561A
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Abstract
The invention discloses a kind of closed loop network load simulation method based on closed loop power flow optimization analysis, comprise the following steps：A. closed loop power flow calculating and short circuit calculation analysis are carried out, the steady limit is moved as criterion using not out-of-limit protection definite value and equipment, auxiliary dispatching decision-making；B. live Check Phase Sequence, it is ensured that the line phase-sequence detection of looped network operation is consistent；C. interconnection switch L1 between transformer station A, B is first closed；D. block switch K1s of the faulty line A close to the interconnection switch L1 ends is separated again；E. block switch Z1 of the faulty line A close to transformer station A ends is finally separated.Closed loop power flow calculating, short circuit calculation analysis and present live Check Phase Sequence should be carried out before looped network back brake, it ensure that the safe operation of power network, the operational efficiency of power distribution network is effectively improved, efficiently avoid construction, maintenance to the adverse effect to power supply management and user.
Description
Technical field
The present invention relates to the closed loop network load simulation method based on closed loop power flow optimization analysis.
Background technology
For the simplified electrical network method of operation, suppress short circuit current level, improve the power supply reliability of power network, maintain the peace of power network
Full economical operation, China 110kV and following supply and distribution net are typically using looped network design, the pattern of open loop operation.When needing to shift
When load or maintenance finish plan and restored electricity, typically use the operator scheme unlinked after first cyclization to avoid user from having a power failure, raising
The power supply reliability of user.
There may be larger closed loop power flow during due to Loop Closing Operation, cause apparatus overload or relay protection to act, cause
Loop Closing Operation failure has a power failure.If relay fail, device damage or upper level protection act may be caused, expands power failure model
Enclose.Because the operation conditions of power network after cyclization is opaque to scheduling operations staff, management and running personnel are difficult pre- by rule of thumb
First judge the reliability of Loop Closing Operation, it is likely that cause apparatus overload or trip protection after cyclization because closed loop power flow is excessive, most
Cause Loop Closing Operation to fail eventually, cause user has a power failure or electrical equipment damages etc..Because closed loop power flow size is difficult to directly predict,
In order to prevent device damage, sometimes operated using break-before-make principle, cause user to have a power failure in short-term, this sacrifices power network
Power supply reliability, it is unacceptable in the important load power supply area such as urban district.Therefore, before Loop Closing Operation is carried out, it should
Closed loop power flow budget is carried out, the situation after involutive ring accomplishes to know what's what, and ensures Loop Closing Operation success, improves power supply reliability.
In the case of conditional, the situation that closed loop power flow size changes over time should be tracked by the in-service monitoring of involutive ring trend,
Selection carries out cyclization solution operation at the closed loop power flow less moment, improves the success rate of Loop Closing Operation.
There is comprehensive measurement system under power transmission network usual condition, redundancy be present for the electrical quantity of equipment, but match somebody with somebody
Power network lacks monitoring means, operation electric data deficiency, more Accurate Analysis is carried out to power distribution network and brings difficulty, it is necessary to the state of progress
The analysis such as estimation.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of closed loop network load based on closed loop power flow optimization analysis
Analogy method, ensure online closed loop power flow optimization precision of analysis.
In order to solve the above technical problems, the invention provides a kind of closed loop network based on closed loop power flow optimization analysis
Load simulation method, comprise the following steps：A. closed loop power flow calculating and short circuit calculation analysis are carried out, with not out-of-limit protection definite value
It is criterion to move the steady limit with equipment, auxiliary dispatching decision-making；B. live Check Phase Sequence, it is ensured that the line phase-sequence detection of looped network operation is consistent；
C. interconnection switch L1 between transformer station A, B is first closed；D. points of the faulty line A close to the interconnection switch L1 ends is separated again
Duan Kaiguan K1；E. block switch Z1 of the faulty line A close to transformer station A ends is finally separated.It should be carried out before looped network back brake
Closed loop power flow is calculated, short circuit calculation is analyzed and present live Check Phase Sequence, it is ensured that and not out-of-limit protection definite value and equipment move the steady limit,
Ensure looped network operation line phase-sequence detection it is consistent, and by cyclization time control to minimum, it is the smaller the better, efficiently avoid produce compared with
Big circulation, causes circuit overload, make relay protection action tripping operation, and cyclization moment power network occur short circuit, jeopardize circuit and
The safety of equipment, or even make the generation of the fortuitous events such as device damage, it is ensured that the safe operation of power network, it is effectively improved and matches somebody with somebody
The operational efficiency of power network, construction, maintenance are efficiently avoid to the adverse effect to power supply management and user.
Applied to the distribution network load calibration method of online closed loop power flow optimization analysis, comprise the following steps：
Step 1, all load values of power distribution network are adjusted to the rated load of distribution transformer；
Step 2, the current value for carrying out obtaining feeder line head end after Load flow calculation is exactly the fully loaded current value of feeder line；
Step 3, with feeder line measured current and feeder line full-load current be calculated the actual loading rate of feeder line；
Step 4, calculated after the actual loading rate of feeder line is obtained：Scap feeder line full loads head end measures load, Sload feeder lines
The new load that actual measurement load, Tcap distribution transformings rated capacity, Tload1 distribution transformings current loads, Tload2 distribution transformings are calculated；
Step 5, after with all distribution transformer load values are refreshed in once iterating to calculate, recalculate to obtain the new of feeder line head end
Load value, whether newer load value equal with the actual measuring value difference of feeder line head end, if be unsatisfactory for require if again
Adjustment distribution transformer load is calculated, until meeting convergence precision requirement.
The present invention should carry out closed loop power flow calculating, short circuit calculation analysis and present live Check Phase Sequence before looped network back brake,
Ensuring that not out-of-limit protection definite value and equipment move the steady limit, it is ensured that the line phase-sequence detection of looped network operation is consistent, and by cyclization time control
It is the smaller the better to minimum, it efficiently avoid and produce larger circulation, cause circuit overload, make relay protection action tripping operation, with
And short circuit occurs for cyclization moment power network, jeopardizes the safety of circuit and equipment, or even make the generation of the fortuitous events such as device damage, really
The safe operation of power network has been protected, has been effectively improved the operational efficiency of power distribution network, efficiently avoid construction, maintenance to power supply
Management and the adverse effect of user.
By the load of the amount calculating transformer of feeder line head end and network load is calibrated, so as to ensure online cyclization
Tide optimization precision of analysis.
Brief description of the drawings
Fig. 1 is the three two interconnector figures of segmentation of the present invention；
Fig. 2 shows the schematic diagram of the artificial picture legend of power distribution network wiring diagram cable run of the prior art；
Fig. 3 shows that power distribution network wiring diagram overhead transmission line of the prior art automatically generates the schematic diagram of legend；
Fig. 4 shows that power distribution network wiring diagram cable run of the prior art automatically generates the schematic diagram of legend；
Fig. 5 shows the schematic flow sheet of the power distribution network wiring diagram automatic generation method according to technical solution of the present invention；
Fig. 6 shows the schematic flow sheet of the power distribution network wiring diagram automatic generation method according to technical solution of the present invention.
Embodiment
A kind of closed loop network load simulation method based on closed loop power flow optimization analysis, comprises the following steps：
A. closed loop power flow calculating and short circuit calculation analysis are carried out, the steady limit is moved as criterion using not out-of-limit protection definite value and equipment, it is auxiliary
Auxiliary dispatch decision-making；
B. live Check Phase Sequence, it is ensured that the line phase-sequence detection of looped network operation is consistent；
C. interconnection switch L1 between transformer station A, B is first closed；
D. block switch K1s of the faulty line A close to the interconnection switch L1 ends is separated again；
E. block switch Z1 of the faulty line A close to transformer station A ends is finally separated.
Closed loop power flow calculating, short circuit calculation analysis and present live Check Phase Sequence should be carried out before looped network back brake, it is ensured that not out-of-limit guarantor
Shield definite value and equipment move the steady limit, it is ensured that looped network operation line phase-sequence detection it is consistent, and by cyclization time control to minimum, it is smaller get over
It is good, it efficiently avoid and produce larger circulation, cause circuit overload, make relay protection action tripping operation, and cyclization moment electricity
Short circuit occurs for net, jeopardizes the safety of circuit and equipment, or even make the generation of the fortuitous events such as device damage, it is ensured that the peace of power network
Row for the national games, the operational efficiency of power distribution network is effectively improved, efficiently avoid construction, maintenance to power supply management and user
Adverse effect.
The technical program is applied to 10kV power distribution networks, and distribution line type has：Overhead transmission line, cable run and aerial cable
Joint line.
Fig. 3 shows that power distribution network wiring diagram overhead transmission line of the prior art automatically generates the schematic diagram of legend.Such as Fig. 3 institutes
Show, for overhead transmission line：1st, the line name is selected or inputted, inputs the quantity of the electric pole of the circuit backbone, program is automatic
Generate basic routing line electric pole sequence；2nd, electric pole type is defined（E.g., including straight line pole, branch bar）, if branch bar（Example
Such as, it is including T-shaped or cross）, program generating branch line automatically, inputting the electricity of the branch at power pole symbol corresponding to the bar number
The quantity of bar, so repeat, until generating the tree-like sequence of whole electric poles of the circuit；3rd, the equipment on having bar（E.g., including open
Pass, disconnecting link, fuse switch, distribution transforming etc.）Power pole symbol on selection define bar on device attribute（E.g., including title, set
Standby type etc.）, until all having defined；4th, program according to equipment in the electric pole tree structure and bar of generation according to branch and main line
Vertically, branch line does not intersect, not overlapping principle automatically generates wiring diagram to equipment on the diagram.Contrast overhead line is manually drawn（Fig. 1）With
Automatic mapping legend（Fig. 3）, because automatic mapping is the auxiliary device using switch, distribution transforming etc. as electric pole, it is therefore necessary to scheming
Upper display power pole symbol (soft dot).
Fig. 4 shows that power distribution network wiring diagram cable run of the prior art automatically generates the schematic diagram of legend.Such as Fig. 4 institutes
Show, for cable run：Only into electric pole need to be changed to feeder pillar or distribution station（E.g., including ring main unit, switchyard, distribution box,
Power distribution room, cell change etc.）, equipment changes the equipment inside distribution station on bar（E.g., including switch, distribution transforming etc.）.
It is understood that said structure and method can be applied equally to aerial cable joint line.
Fig. 5 shows the schematic flow sheet of the power distribution network wiring diagram automatic generation method according to technical solution of the present invention.Such as
Shown in Fig. 5, the present invention provides a kind of power distribution network wiring diagram automatic generation method, suitable for overhead transmission line, comprises the following steps：
S101, by detection module, detect the input operation of user, and line name and the circuit are obtained according to the input operation of user
The quantity of the electric pole of backbone；S102, by automatic mapping module, according to the input operation of user and the line name obtained and
The quantity of the electric pole of the circuit backbone, generate basic routing line electric pole sequence；S103, by display module, show connecing for generation
Line chart, wherein：The wiring diagram includes：The basic routing line electric pole sequence.
A kind of power distribution network wiring diagram automatic generation method also includes：The detection module further detects user's selection
Electric pole type；The electric pole type that the automatic mapping module is selected according to user automatically in the bar number corresponding at power pole symbol
Generate branch line；The branch line of the display module display generation.
The electric pole type includes：Straight line pole or branch bar.
The detection module further detects the electric pole type of user's selection, in addition to：By judging unit, described in judgement
The type of electric pole, when it is branch bar to judge the electric pole, it will determine that result is sent to the automatic mapping module, to pass through
The automatic mapping module is generating the branch line automatically at power pole symbol corresponding to the bar number.
The branch bar further comprises：It is T-shaped or cross.
The detection module further detects the quantity of the electric pole of the electric pole type of user's selection and the branch of input, such as
This is repeated, until generating the tree-like sequence of whole electric poles of the circuit.
Further detection selects definition to the detection module on the electric pole on the power pole symbol for the equipment that user selects
Device attribute on bar, untill detecting that the whole operation of user terminates；By automatic mapping module, according to the electric pole of generation
Equipment automatically generates wiring diagram in tree structure and bar；By the display module, the wiring diagram of generation is shown, wherein：
The display result of the wiring diagram includes：Branch and main line are mutually perpendicular to, do not intersect between branch line and branch line and electric pole on configure
Equipment between display on the diagram it is not overlapping.
Fig. 6 shows the schematic flow sheet of the power distribution network wiring diagram automatic generation method according to technical solution of the present invention.Such as
Shown in Fig. 6, according to another aspect of the present invention, there is provided a kind of power distribution network wiring diagram automatic generation method, suitable for cable
Circuit, comprise the following steps：S201, by detection module, detect the input operation of user, and obtain according to the input operation of user
Take the feeder pillar of line name and the circuit backbone or the quantity of distribution station；S202, by automatic mapping module, according to
The input operation at family and the line name and the feeder pillar or distribution station quantity of the circuit backbone obtained, generate basic routing line
The sequence of feeder pillar or distribution station；S203, by display module, show the wiring diagram of generation, wherein：The wiring diagram bag
Include：The sequence of the basic routing line feeder pillar or distribution station.
The power distribution network wiring diagram automatic generation method also includes：The detection module further detects point of user's selection
The type of branch case or distribution station；The feeder pillar or the type of distribution station that the automatic mapping module selects according to user are automatic
Branch line is generated at the symbol of feeder pillar or distribution station corresponding to the bar number；Described point of the display module display generation
Branch line.
The type of the distribution station includes：Ring main unit, switchyard, switching station, power distribution room or distribution box.
Equipment on the distribution station includes：Switch, disconnecting link, bus or distribution transforming.
A kind of power distribution network wiring diagram automatic generation method provided by the invention, can also be not required to independent of any wiring diagram
Graphic elements are manually placed on the diagram and then draw the Plot Works such as connecting line, it is only necessary to safeguard the model of distribution line, just
The line chart and GIS figures of one circuit of distribution can be automatically generated.
Those skilled in the art of the present technique are appreciated that in the various operations discussed in the present invention, method, flow
Step, measure, scheme can be replaced, changed, combined or deleted.With discussed in the present invention various operations, side
Other steps, measure, scheme in method, flow can also be replaced, changed, reset, decomposed, combined or deleted.Prior art
In have can also be replaced, more with the step in the various operations disclosed in the present invention, method, flow, measure, scheme
Change, reset, decompose, combine or delete.
Described above is only some embodiments of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (2)
1. a kind of closed loop network load simulation method based on closed loop power flow optimization analysis, comprises the following steps：
A. closed loop power flow calculating and short circuit calculation analysis are carried out, the steady limit is moved as criterion using not out-of-limit protection definite value and equipment, it is auxiliary
Auxiliary dispatch decision-making；
B. live Check Phase Sequence, it is ensured that the line phase-sequence detection of looped network operation is consistent；
C. interconnection switch L1 between transformer station A, B is first closed；
D. block switch K1s of the faulty line A close to the interconnection switch L1 ends is separated again；
E. block switch Z1 of the faulty line A close to transformer station A ends is finally separated.
2. according to the method for claim 1, it is characterised in that closed loop power flow calculating, short circuit should be carried out before looped network back brake
Calculate analysis and present live Check Phase Sequence, it is ensured that not out-of-limit protection definite value and equipment move the steady limit, it is ensured that the line of looped network operation
Road phase sequence is consistent, and by cyclization time control to minimum, it is the smaller the better, it efficiently avoid and produce larger circulation, cause line
Load is passed by, makes relay protection action tripping operation, and cyclization moment power network that short circuit occur, jeopardizes the safety of circuit and equipment, even
Make the generation of the fortuitous events such as device damage, it is ensured that the safe operation of power network, the operational efficiency of power distribution network is effectively improved,
Construction, maintenance be efficiently avoid to the adverse effect to power supply management and user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710945275.6A CN107565561A (en) | 2017-10-12 | 2017-10-12 | Closed loop network load simulation method based on closed loop power flow optimization analysis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710945275.6A CN107565561A (en) | 2017-10-12 | 2017-10-12 | Closed loop network load simulation method based on closed loop power flow optimization analysis |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066676A (en) * | 2018-10-10 | 2018-12-21 | 云南电网有限责任公司临沧供电局 | A kind of cyclization based on SCADA system turns the safety evaluation method of power supply |
| CN110445108A (en) * | 2019-07-31 | 2019-11-12 | 云南电网有限责任公司瑞丽供电局 | A kind of cyclization tune electric protection control method improving power supply reliability |
| CN110880765A (en) * | 2019-12-19 | 2020-03-13 | 深圳供电局有限公司 | Power distribution network closed loop operation method and system, closed loop operation equipment and storage medium |
| CN110994623A (en) * | 2019-12-26 | 2020-04-10 | 深圳供电局有限公司 | 10kV superconducting loop closing operation method |
| CN112529541A (en) * | 2020-12-25 | 2021-03-19 | 山东鲁能软件技术有限公司 | Method and system for generating equipment measurement label in distribution network line diagram |
-
2017
- 2017-10-12 CN CN201710945275.6A patent/CN107565561A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066676A (en) * | 2018-10-10 | 2018-12-21 | 云南电网有限责任公司临沧供电局 | A kind of cyclization based on SCADA system turns the safety evaluation method of power supply |
| CN110445108A (en) * | 2019-07-31 | 2019-11-12 | 云南电网有限责任公司瑞丽供电局 | A kind of cyclization tune electric protection control method improving power supply reliability |
| CN110445108B (en) * | 2019-07-31 | 2021-10-08 | 云南电网有限责任公司瑞丽供电局 | Loop-closing power-adjusting protection control method for improving power supply reliability |
| CN110880765A (en) * | 2019-12-19 | 2020-03-13 | 深圳供电局有限公司 | Power distribution network closed loop operation method and system, closed loop operation equipment and storage medium |
| CN110994623A (en) * | 2019-12-26 | 2020-04-10 | 深圳供电局有限公司 | 10kV superconducting loop closing operation method |
| CN112529541A (en) * | 2020-12-25 | 2021-03-19 | 山东鲁能软件技术有限公司 | Method and system for generating equipment measurement label in distribution network line diagram |
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