CN109066671A - A kind of cyclization tune electric control method - Google Patents
A kind of cyclization tune electric control method Download PDFInfo
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- CN109066671A CN109066671A CN201811122988.3A CN201811122988A CN109066671A CN 109066671 A CN109066671 A CN 109066671A CN 201811122988 A CN201811122988 A CN 201811122988A CN 109066671 A CN109066671 A CN 109066671A
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- 238000007363 ring formation reaction Methods 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 38
- 229910001037 White iron Inorganic materials 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 208000032368 Device malfunction Diseases 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
This application discloses a kind of cyclization tune electric control methods, comprising: step S01: main website calculates and judges whether cyclization point two sides closed loop network data are out-of-limit；Step S02: if executing Loop Closing Operation without out-of-limit in closed loop network data；Step S03: if in closed loop network data at least one it is out-of-limit, the load tap changer of main website pairing circling point two sides is adjusted and the access amount of pairing circling point two sides flexible load is controlled；Step SO4: main website recalculates and judges whether cyclization point two sides closed loop network data are out-of-limit；Step SO5: if executing Loop Closing Operation without out-of-limit in closed loop network data；Otherwise, return step S03.The application is in the case where coarse adjustment and fine tuning combine, the voltage of flexible pairing circling point two sides is adjusted, it makes full use of in station that criterion is out-of-limit during existing equipments resources involutive rings is adjusted, distribution network system is realized and is controlled, guarantee that Loop Closing Operation is accurate, progress of safety.
Description
Technical field
This application involves technical field of power systems more particularly to a kind of cyclization tune electric control methods.
Background technique
China's power distribution network uses the power supply mode of " closed loop design, open loop operation " for a long time, i.e. load generally has and has
The dual power supply even structure of multiple feed, this improves the flexibility of power supply, also provides to allow to execute Loop Closing Operation
Primary condition.Therefore, power supply reliability can be improved by the operation of cyclization in maintenance or the in the case where of falling load, reduces
Influence to user.
With increasing for power distribution network bidirectional power supply and multiple feed situation, in maintenance or the in the case where of falling load, selection
Supply path appropriate carries out Loop Closing Operation, and the reliability of power supply can be improved.The amplitude difference of cyclization point two sides voltage vector
When larger, if biggish Alloy White Iron can be generated by executing Loop Closing Operation, so as to lead to protective device malfunction or be more than equipment
Rated value influences the safe operation of power distribution network.Traditional Loop Closing Operation often rely on the experience of operations staff to determine whether into
Row cyclization.
Due to artificially judging whether to reach cyclization condition, lack Technical analysis and the control hand to distribution network system
Section, actual operation also have in the presence of very big randomness, and there is certain operational risks, so that Loop Closing Operation can not be safe
It is effective to implement.
Summary of the invention
This application provides a kind of cyclization tune electric control method, with solve in the prior art due to lack Technical analysis with
And the control means to distribution network system, lead to the uncontrollable technical problem of Loop Closing Operation safety.
In order to solve the above-mentioned technical problem, the embodiment of the present application discloses following technical solution:
The embodiment of the present application discloses a kind of cyclization tune electric control method, which comprises
Step S01: main website calculates and judges whether cyclization point two sides closed loop network data are out-of-limit, the closed loop network
Data include Alloy White Iron I1With protection current limliting I2, the voltage U of cyclization point two sides1And U2And the phase angle of cyclization point two sidesWith
Step S02: if executing Loop Closing Operation without out-of-limit in the closed loop network data；
Step S03: if in the closed loop network data at least one it is out-of-limit, the main website is to the cyclization point two
The load tap changer of side is adjusted and the access amount of cyclization point two sides flexible load is controlled in the main website
System；
Step SO4: the main website recalculates and judges whether cyclization point two sides closed loop network data are out-of-limit；
Step SO5: if executing Loop Closing Operation without out-of-limit in the closed loop network data；Otherwise, return step
S03。
Preferably, in above-mentioned cyclization tune electric control method, transformer tap of the main website to cyclization point two sides
Head is adjusted, comprising:
The no-load voltage ratio of the high side of voltage value is turned up, the voltage of the high side of voltage value is reduced；
Alternatively,
The no-load voltage ratio of the low side of voltage value is reduced, the voltage of the low side of voltage value is increased.
Preferably, in above-mentioned cyclization tune electric control method, the main website connects cyclization point two sides flexible load
Enter amount to be controlled, comprising:
The constant of the load access amount of cyclization point side is kept, the load access amount of the other side is controlled；
Alternatively,
The access amount of cyclization point two sides flexible load is adjusted simultaneously.
Preferably, it in above-mentioned cyclization tune electric control method, is calculated in the main website and compares cyclization point two sides power distribution network
Before whether cyclization data are out-of-limit, the method also includes:
The main website obtains the voltage magnitude and phase mass of cyclization point two sides, and carries out electrical secondary system nuclear phase；
When cyclization point two sides operate under peak load state, the main website carries out initial Load flow calculation.
Preferably, in above-mentioned cyclization tune electric control method, after step S03, the method also includes: when the conjunction
When circling point two sides are operated under peak load state, the main website be adjusted after Load flow calculation.
Preferably, in above-mentioned cyclization tune electric control method, the Alloy White Iron and protection current limliting are without out-of-limit condition are as follows:
I1-I2≤0。
Preferably, in above-mentioned cyclization tune electric control method, the protection current limliting is in two lateral circuit of closed loop network point
Feeder line overcurrent protection and cyclization switch over-current protect minimum movements value.
Preferably, in above-mentioned cyclization tune electric control method, the voltage U of cyclization point two sides1And U2Without out-of-limit condition
Are as follows:
In formula, UBFor route reference voltage.
Preferably, in above-mentioned cyclization tune electric control method, the phase angle of cyclization point two sidesWithWithout out-of-limit item
Part are as follows:
Compared with prior art, the application has the beneficial effect that
This application provides a kind of cyclization tune electric control methods, which comprises main website first obtains in cyclization circuit
Related data is simultaneously calculated, and judges whether cyclization point two sides closed loop network data are out-of-limit, the closed loop network data packet
Include Alloy White Iron I1With protection current limliting I2, the voltage U of cyclization point two sides1And U2And the phase angle of cyclization point two sidesWithIf institute
It states in closed loop network data without out-of-limit, then executes Loop Closing Operation；If being got at least one in the closed loop network data
Limit, then the load tap changer of cyclization point two sides is adjusted in the main website, realizes coarse adjustment and the main website pair
The access amount of cyclization point two sides flexible load is controlled, and realizes fine adjustment.The main website recalculates and judges cyclization
Whether point two sides closed loop network data are out-of-limit, if executing Loop Closing Operation without out-of-limit in the closed loop network data；It is no
Then, adjustment is re-started.
By carrying out coarse adjustment with the variable quantity of no-load voltage ratio to load tap changer, meanwhile, pass through connecing for control flexible load
Enter amount and be finely adjusted section, until final adjusting meets cyclization criterion.In the application in the case where coarse adjustment and fine tuning combine, spirit
The voltage of pairing circling point two sides living is adjusted, and takes full advantage of in station that criterion is got over during existing equipments resources involutive rings
Limit is adjusted.By carrying out data acquisition and calculating in closed loop network circuit, and then distribution network system is realized and is controlled, protected
The progress that Loop Closing Operation is accurate, safe is demonstrate,proved, ensure that the reliability of power supply.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The application can be limited.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is a kind of flow diagram of cyclization tune electric control method provided in an embodiment of the present invention.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is only some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, the common skill in this field
The application protection all should belong in art personnel every other embodiment obtained without making creative work
Range.
In the application, take full advantage of in station that criterion is out-of-limit during existing equipments resources involutive rings is adjusted, controls,
Specifically, main website is connect with protective device in circuit by cable, and protective device includes: feeder protection equipment and prepared auto restart protection
Device, after connection, main website is electric current, voltage, the position of the switch, protection definite value and the feeder line parameter that protective device can be read and monitored
Etc. real-time electrical quantity.In the application, main website is also connected with and has controlled background monitoring, and background monitoring includes main shift, existing negative
Lotus, controllable flexible load.
Referring to Fig. 1, a kind of flow diagram of cyclization tune electric control method provided in an embodiment of the present invention.In conjunction with Fig. 1, originally
Inventive embodiments provide cyclization tune electric control method the following steps are included:
Step S01: main website calculates and judges whether cyclization point two sides closed loop network data are out-of-limit, the closed loop network
Data include Alloy White Iron I1With protection current limliting I2, the voltage U of cyclization point two sides1And U2And the phase angle of cyclization point two sidesWith
Before step S01, this method further include: main website obtains the voltage magnitude and phase mass of cyclization point two sides, goes forward side by side
Row electrical secondary system nuclear phase；When cyclization point two sides operate under peak load state, the main website carries out initial trend meter
It calculates.
Secondary nuclear phase is in order to which whether the phase for checking voltage on the phase conductor of the same name in the voltage of cyclization point two sides is identical, really
Recognize that two sides A, B, C be separate and phase sequence, allows to operate after nuclear phase is errorless, otherwise without subsequent step.Load flow calculation is to examine
Whether test has big cyclization power during cyclization or the problems such as system stability disruption, fault spread, Load flow calculation occurs
Required data include branch resistance, reactance, transformer voltage ratio, load parameter etc., then are calculated by existing software, herein not
It repeats.
In the application, real-time electrical quantity needed for calculating closed loop network data, including protection dress can be obtained by main website
Monitored electric current, voltage, the position of the switch, protection definite value and feeder line parameter etc. are set, further calculates to obtain Alloy White Iron I1With
Protect current limliting I2, the voltage U of cyclization point two sides1And U2And the phase angle of cyclization point two sidesWith
Step S02: if executing Loop Closing Operation without out-of-limit in the closed loop network data；
As Alloy White Iron I1With protection current limliting I2, the voltage U of cyclization point two sides1And U2And the phase angle of cyclization point two sidesWithWithout more prescribing a time limit, Loop Closing Operation can be executed.
Wherein, Alloy White Iron and protection current limliting are without out-of-limit condition are as follows: I1-I2≤ 0, protection current limliting is chosen for power distribution network conjunction
Feeder line overcurrent protection and cyclization switch over-current protect minimum movements value in two lateral circuit of circling point.
The voltage U of cyclization point two sides1And U2Without out-of-limit condition are as follows:In formula, UBFor line
Road reference voltage.
The phase angle of cyclization point two sidesWithWithout out-of-limit condition are as follows:
When meeting above three relational expression, i.e., when electric current, voltage, phase angle are all satisfied above-mentioned relation, cyclization behaviour can be executed
Make.
Step S03: if in the closed loop network data at least one it is out-of-limit, the main website is to the cyclization point two
The load tap changer of side is adjusted and the access amount of cyclization point two sides flexible load is controlled in the main website
System；
Specifically, it includes: the side that voltage value is high that the load tap changer of main website pairing circling point two sides, which is adjusted,
No-load voltage ratio is turned up, and the voltage of the high side of voltage value is reduced；Alternatively, the no-load voltage ratio of the low side of voltage value is reduced, increase voltage value
The voltage of low side.It is closed in cyclization tune electric control method provided in an embodiment of the present invention with the variable quantity of no-load voltage ratio to be adjusted
The voltage of circling point two sides can effectively control the size of Alloy White Iron, be adjusted respectively using distribution network system and cyclization point two sides
Directly related load tap changer can calculate again after adjusting and judge whether cyclization point two sides closed loop network data get over
Limit, if satisfied, Loop Closing Operation then can be performed.
Further, main website can be controlled with the access amount of pairing circling point two sides flexible load, comprising: keep cyclization point
The load access amount of side it is constant, control the load access amount of the other side；Alternatively, adjusting cyclization point two sides flexible load simultaneously
Access amount.If having not been met related criteria after carrying out above-mentioned load tap changer adjustment, then adjust cyclization switch two sides or to
The access amount of the flexible load of few side.It can be remained stationary on the basis of the load of wherein cyclization point side, adjust cyclization point
Other side load change reduces two sides voltage amplitude value difference to reach, it is of course also possible to by adjusting cyclization point two sides flexible load
Access amount, achieve the effect that reduce voltage amplitude value difference.Cyclization point two sides closed loop network can be calculated and judged after adjusting again
Whether data are out-of-limit, if satisfied, Loop Closing Operation then can be performed.
In above two adjustment control means, load tap changer is adjusted as coarse adjustment, flexible load is connect
Enter amount and carry out control as fine adjustment, in practical operation, staff can be according to the cyclization point two sides voltage difference being calculated
Size cases select adjustment means, if difference is larger, coarse adjustment or coarse adjustment and the means that fine adjustment combines may be selected,
If difference is smaller, can directly be regulated and controled by fine adjustment.
Step SO4: the main website recalculates and judges whether cyclization point two sides closed loop network data are out-of-limit；
Calculating process is as described in step S01, and cyclization point two sides power distribution network closes after main website reacquires and calculates adjustment
Whether loop data is out-of-limit.
Step SO5: if executing Loop Closing Operation without out-of-limit in the closed loop network data；Otherwise, return step
S03。
It is additionally ensured that safe operation process smoothly carries out, after each adjustment, can be operated in cyclization point two sides
When under peak load state, main website be adjusted after Load flow calculation.
To sum up, main website first obtains the related data in cyclization circuit and is calculated, and judges distribution described in cyclization point two sides
Network closed loop data include Alloy White Iron I1With protection current limliting I2, the voltage U of cyclization point two sides1And U2And the phase angle of cyclization point two sidesWithIt is whether out-of-limit.If carrying out Loop Closing Operation without out-of-limit in above-mentioned data；If being got at least one in above-mentioned data
Limit, undesirable, then the voltage of main website pairing circling point two sides carries out coarse adjustment and fine tuning respectively, i.e., by load tap changer into
Row, which is adjusted, realizes coarse adjustment, and carries out control by the access amount to pairing circling point two sides flexible load and realize fine adjustment.Institute
It states main website to recalculate and judge whether cyclization point two sides closed loop network data are out-of-limit, if in the closed loop network data
Without out-of-limit, then Loop Closing Operation is executed；Otherwise, adjustment is re-started.
By being carried out with the variable quantity of no-load voltage ratio to load tap changer in cyclization tune method for electrically provided in an embodiment of the present invention
Coarse adjustment, to realize the voltage for adjusting cyclization point two sides, meanwhile, the access amount by controlling flexible load is finely adjusted section, most
It is adjusted until meeting cyclization criterion eventually.In the application in the case where coarse adjustment and fine tuning combine, flexible pairing circling point two sides
Voltage be adjusted, and take full advantage of in station that criterion is out-of-limit during existing equipments resources involutive rings is adjusted.Pass through
Carry out data acquisition and calculating in closed loop network circuit, and then distribution network system realized and is controlled, guarantee Loop Closing Operation it is accurate,
The progress of safety guarantees the reliability of power supply.
Since embodiment of above is that reference combination is illustrated on other modes, have between different embodiments
There is identical part, identical, similar part may refer to each other between each embodiment in this specification.Herein no longer in detail
It illustrates.
It should be noted that in the present specification, the relational terms of such as " first " and " second " or the like are used merely to
It distinguishes one entity or operation from another entity or operation, and not necessarily requires or imply these entities or operation
Between there are any this actual relationship or sequences.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the circuit structure, article or the equipment that include a series of elements not only include those
Element, but also including other elements that are not explicitly listed, or further include for this circuit structure, article or equipment
Intrinsic element.In the absence of more restrictions, the element for thering is sentence "including a ..." to limit, it is not excluded that
There is also other identical elements in circuit structure, article or equipment including the element.
Those skilled in the art will readily occur to its of the application after considering specification and practicing the disclosure invented here
His embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows the general principle of the application and including the undocumented common knowledge in the art of the application
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are wanted by right
The content asked is pointed out.
Above-described the application embodiment does not constitute the restriction to the application protection scope.
Claims (9)
1. a kind of cyclization tune electric control method, which is characterized in that the described method includes:
Step S01: main website calculates and judges whether cyclization point two sides closed loop network data are out-of-limit, the closed loop network data
Including Alloy White Iron I1With protection current limliting I2, the voltage U of cyclization point two sides1And U2And the phase angle of cyclization point two sidesWith
Step S02: if executing Loop Closing Operation without out-of-limit in the closed loop network data；
Step S03: if in the closed loop network data at least one it is out-of-limit, the main website is to cyclization point two sides
Load tap changer is adjusted and the main website controls the access amount of cyclization point two sides flexible load；
Step SO4: the main website recalculates and judges whether cyclization point two sides closed loop network data are out-of-limit；
Step SO5: if executing Loop Closing Operation without out-of-limit in the closed loop network data；Otherwise, return step S03.
2. cyclization tune electric control method according to claim 1, which is characterized in that the main website is to cyclization point two sides
Load tap changer be adjusted, comprising:
The no-load voltage ratio of the high side of voltage value is turned up, the voltage of the high side of voltage value is reduced；
Alternatively,
The no-load voltage ratio of the low side of voltage value is reduced, the voltage of the low side of voltage value is increased.
3. cyclization tune electric control method according to claim 1, which is characterized in that the main website is to cyclization point two sides
The access amount of flexible load is controlled, comprising:
The constant of the load access amount of cyclization point side is kept, the load access amount of the other side is controlled；
Alternatively,
The access amount of cyclization point two sides flexible load is adjusted simultaneously.
4. cyclization tune electric control method according to claim 1, which is characterized in that calculated in the main website and compare cyclization
Before whether point two sides closed loop network data are out-of-limit, the method also includes:
The main website obtains the voltage magnitude and phase mass of cyclization point two sides, and carries out electrical secondary system nuclear phase；
When cyclization point two sides operate under peak load state, the main website carries out initial Load flow calculation.
5. cyclization tune electric control method according to claim 1, which is characterized in that after step S03, the method is also
Include: when cyclization point two sides operate under peak load state, the main website be adjusted after Load flow calculation.
6. cyclization tune electric control method according to claim 1, which is characterized in that the Alloy White Iron and protection current limliting without
Out-of-limit condition are as follows: I1-I2≤0。
7. cyclization tune electric control method according to claim 6, which is characterized in that the protection current limliting is closed loop network
Feeder line overcurrent protection and cyclization switch over-current protect minimum movements value in two lateral circuits of point.
8. cyclization tune electric control method according to claim 1, which is characterized in that the voltage U of cyclization point two sides1With
U2Without out-of-limit condition are as follows:
In formula, UBFor route reference voltage.
9. cyclization tune electric control method according to claim 1, which is characterized in that the phase angle of cyclization point two sidesWithWithout out-of-limit condition are as follows:
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| CN201811122988.3A CN109066671A (en) | 2018-09-26 | 2018-09-26 | A kind of cyclization tune electric control method |
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| CN201811122988.3A CN109066671A (en) | 2018-09-26 | 2018-09-26 | A kind of cyclization tune electric control method |
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| CN110854924A (en) * | 2019-11-04 | 2020-02-28 | 中国能源建设集团华东电力试验研究院有限公司 | One-time voltage-on synchronous phase-checking linkage switching inspection system and inspection method for electrical system |
| CN111952970A (en) * | 2020-08-17 | 2020-11-17 | 云南电网有限责任公司电力科学研究院 | Power distribution network loop closing and power adjusting method and device |
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| CN110299709A (en) * | 2019-07-31 | 2019-10-01 | 云南电网有限责任公司瑞丽供电局 | A kind of flexible cyclization tune method for electrically and device of protection control unified collocation |
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| CN110854924B (en) * | 2019-11-04 | 2021-03-30 | 中国能源建设集团华东电力试验研究院有限公司 | One-time voltage-on synchronous phase-checking linkage switching inspection system and inspection method for electrical system |
| CN111952970A (en) * | 2020-08-17 | 2020-11-17 | 云南电网有限责任公司电力科学研究院 | Power distribution network loop closing and power adjusting method and device |
| CN111952970B (en) * | 2020-08-17 | 2024-03-19 | 云南电网有限责任公司电力科学研究院 | Method and device for closing loop and regulating electricity of power distribution network |
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