CN111934316B - Method for selecting recovery path of transformer substation after tripping of power grid - Google Patents
Method for selecting recovery path of transformer substation after tripping of power grid Download PDFInfo
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- CN111934316B CN111934316B CN202010793457.8A CN202010793457A CN111934316B CN 111934316 B CN111934316 B CN 111934316B CN 202010793457 A CN202010793457 A CN 202010793457A CN 111934316 B CN111934316 B CN 111934316B
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- 238000011084 recovery Methods 0.000 title claims abstract description 148
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012163 sequencing technique Methods 0.000 claims abstract description 7
- 238000012216 screening Methods 0.000 claims abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010187 selection method Methods 0.000 description 1
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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- 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
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention relates to a method for selecting a recovery path of a transformer substation after a power grid trips, which comprises the steps of firstly judging whether recovery paths with the same voltage level exist in the same power supply area, comparing the residual available load capacity of the recovery paths with the same voltage level in the power supply area with the load of the transformer substation to be recovered, screening out the recovery paths which do not meet the load demand, defining the recovery paths which meet the load demand as alternative recovery paths, sequencing the alternative recovery paths according to the residual available load capacity, and preferentially selecting the recovery paths with the residual available load capacity. The invention can effectively solve the problems that in the existing recovery path selection, because of manual operation selection, the selected recovery path is unsuitable for different people, so that the power supply voltage for recovery is too high, too low and overloaded, and further the user is forced to power off and equipment is damaged.
Description
Technical Field
The invention relates to a method for selecting a recovery path of a transformer substation after tripping of a power grid, in particular to a method for selecting a recovery path of a transformer substation after tripping of a power grid based on a SCADA system.
Background
Now, after power-off, there is no mature selection method in the selection of the restoration path. The SCADA system in the EMS system is used for directly checking the power supply condition in the whole area, judging whether an alternative recovery path exists or not, and then selecting the recovery path. Because of manual operation selection, the selected recovery path is unsuitable according to people, so that the power supply voltage for recovery is too high, too low and overloaded, and the problems of forced power failure and equipment damage of users are caused.
Disclosure of Invention
The invention aims to provide a method for selecting a recovery path of a transformer substation after a power grid trips, which solves the problems that in the existing recovery path selection, because of manual operation selection, the selected recovery path is unsuitable for different people, so that the power supply voltage for recovery is too high, too low and overloaded, and further a user is forced to have power failure and equipment damage.
The technical scheme adopted for solving the technical problems is as follows: a method for selecting a recovery path of a transformer substation after tripping of a power grid comprises the following steps:
s1, firstly judging whether a recovery path with the same voltage level exists in the same power supply area, and if so, turning to step S2; if not, turning to step S3;
s2, comparing the residual available load capacity of the recovery paths with the same voltage level in the power supply area with the load of the transformer substation to be recovered, screening out recovery paths which do not meet the load demand, defining the recovery paths which meet the load demand as alternative recovery paths, and sorting the alternative recovery paths according to the residual available load capacity, wherein the recovery paths with the residual available load capacity are selected preferentially; if the recovery path meeting the load demand does not exist, the step S3 is carried out;
s3, checking whether the adjacent power supply areas with the same voltage level have recovery paths with the same voltage level, sequencing the adjacent power supply areas with the recovery paths with the same voltage level according to the distance, and turning to the step S4;
s4, checking whether the residual available load capacity exists in the transformer with the voltage level in the adjacent power supply areas according to the sequence of S3, and if the residual available load capacity does not exist, checking the power supply area with the next adjacent voltage level until the residual available load capacity exists or all the adjacent power supply areas are eliminated; if the residual available load capacity exists, checking whether the residual available load capacity meets the requirement of the to-be-recovered power-transformation load, and if the residual available load capacity does not meet the requirement, checking the power supply area of the next adjacent same voltage level until the situation that the residual available load capacity meets the requirement of the to-be-recovered power-transformation load exists or all adjacent power supply areas are eliminated; if the residual available load capacity meets the load requirement of the transformer substation to be recovered, the step S2 is carried out; and if the recovery path meeting the load demand does not exist, checking the next adjacent power supply area until the condition that the residual available load capacity meets the load demand of the transformer substation to be recovered appears, and switching to S2 or checking all the adjacent power supply areas.
The method for selecting the recovery path of the transformer substation after the tripping of the power grid further comprises a step S5, when the recovery path with the same voltage level which can be selected is not found in the power supply area and the adjacent power supply area,
judging whether the sum of residual load capacities of all the alternative recovery paths in the same power supply area is met, if so, sequencing the recovery paths of the same voltage level according to the residual load capacity, merging and counting the total residual load capacity according to the sequence of the residual load capacity from large to small until the total residual load capacity meets the load requirement of a transformer substation to be recovered, defining a plurality of alternative recovery paths in the merging and counting as final recovery paths, and supplying power together; if not, turning to step S6;
s6, when the sum of the residual load capacities of all recovery paths with the same voltage level in the same power supply area cannot meet the requirement, selecting the recovery paths with the same voltage level in the adjacent power supply areas to perform cross-area combined power supply; when cross-region combined power supply is performed, selecting all recovery paths with unified voltage levels in the power supply region and recovery paths with unified voltage levels in adjacent power supply regions to be combined until the sum of residual load capacity meets the load demand of the transformer substation to be recovered; the adjacent power supply areas are sequenced according to distances, recovery paths with the same voltage level in the same adjacent power supply area are sequenced according to the residual load capacity, and recovery paths with the same voltage level and large residual load capacity are combined first.
The method for selecting the recovery paths of the transformer substation after the tripping of the power grid further comprises the step S7 of selecting a low-voltage side recovery path for recovery when the load demand of the transformer substation to be recovered cannot be met if the power supply is combined across areas, wherein the same power supply area is firstly used for supplying power, then the adjacent power supply area is used for supplying power, the same recovery path belongs to one power supply area, the capacity is high, the adjacent power supply area is in close priority, if the same power supply area and the adjacent power supply area cannot be met, a combining method is adopted for recovering, and the selection principle of the multiple recovery paths is the same as that of the steps S5-S6.
Further, in step S2, if there is a recovery path with a residual available load capacity within 10% in the recovery paths satisfying the load demand; setting the voltage deviation rate of the transformer substation to be recovered as 1, and comparing the voltage deviation rate of the transformer substation to be recovered with the deviation rate of the transformer substation to be recovered under the rated voltage of the transformer substation to be recovered under the condition that power is supplied to each alternative recovery path, wherein the recovery paths with the voltage deviation rate meeting the requirements are prioritized; if there are multiple recovery paths with voltage deviation rates within the acceptable range, selecting according to the impedance of each recovery path, and giving priority to low impedance.
The invention has the beneficial effects that: the method for selecting the recovery paths of the transformer substation after the tripping of the power grid comprises the steps of judging whether the recovery paths are selected in the same power supply area, considering whether the recovery paths are in adjacent power supply areas, and considering the selection of the combined power supply recovery paths, wherein the combined power supply is divided into the selection combination of the regional recovery paths and the selection combination of the cross-regional recovery paths; whether the selection of a single recovery path in the same area or across areas or the combination of multiple paths is based on the principle of high priority of the residual available load capacity. The whole method has strict and reasonable logic, provides a more reliable and reasonable method for the selection of the recovery path, and can effectively solve the problems that the selected recovery path is unsuitable, so that the power supply voltage for recovery is too high, too low and overloaded, and the user is forced to have power failure and equipment damage because of manual operation selection in the existing recovery path selection.
The present invention will be described in more detail with reference to examples.
Detailed Description
The embodiment of the method for selecting the recovery path of the transformer substation after the tripping of the power grid is based on the SCADA system and the topological relation comprises the following steps:
s1, firstly judging whether a recovery path with the same voltage level exists in the same power supply area, and if so, turning to step S2; if not, turning to step S3;
s2, comparing the residual available load capacity of the recovery paths with the same voltage level in the power supply area with the load of the transformer substation to be recovered, screening out recovery paths which do not meet the load demand, defining the recovery paths which meet the load demand as alternative recovery paths, sorting the alternative recovery paths according to the residual available load capacity, preferentially selecting the recovery paths with large residual available load capacity, and positioning the final recovery paths; if the recovery path meeting the load demand does not exist, the step S3 is carried out;
s3, checking whether the adjacent power supply areas with the same voltage level have recovery paths with the same voltage level, sequencing the adjacent power supply areas with the recovery paths with the same voltage level according to the distance, and turning to the step S4;
s4, checking whether the residual available load capacity exists in the transformer with the voltage level in the adjacent power supply areas according to the sequence of S3, and if the residual available load capacity does not exist, checking the power supply area with the next adjacent voltage level until the residual available load capacity exists or all the adjacent power supply areas are eliminated; if the residual available load capacity exists, checking whether the residual available load capacity meets the requirement of the to-be-recovered power-transformation load, and if the residual available load capacity does not meet the requirement, checking the power supply area of the next adjacent same voltage level until the situation that the residual available load capacity meets the requirement of the to-be-recovered power-transformation load exists or all adjacent power supply areas are eliminated; if the residual available load capacity meets the load demand of the transformer substation to be recovered, turning to step S2, comparing the residual available load capacity of the recovery paths with the same voltage level in the power supply area with the load of the transformer substation to be recovered, screening out recovery paths which do not meet the load demand, defining the recovery paths which meet the load demand as alternative recovery paths, and sorting the alternative recovery paths according to the residual available load capacity, wherein the recovery paths with large residual available load capacity are preferentially selected; and if the recovery path meeting the load demand does not exist, checking the next adjacent power supply area until the condition that the residual available load capacity meets the load demand of the transformer substation to be recovered appears, and switching to S2 or checking all the adjacent power supply areas.
The method for selecting the recovery path of the transformer substation after the tripping of the power grid further comprises a step S5, when the recovery path with the same voltage level which can be selected is not found in the power supply area and the adjacent power supply area,
judging whether the sum of residual load capacities of all the alternative recovery paths in the same power supply area is met, if so, sequencing the recovery paths of the same voltage level according to the residual load capacity, merging and counting the total residual load capacity according to the sequence of the residual load capacity from large to small until the total residual load capacity meets the load requirement of a transformer substation to be recovered, defining a plurality of alternative recovery paths in the merging and counting as final recovery paths, and supplying power together; if not, turning to step S6;
s6, when the sum of the residual load capacities of all recovery paths with the same voltage level in the same power supply area cannot meet the requirement, selecting the recovery paths with the same voltage level in the adjacent power supply areas to perform cross-area combined power supply; when cross-region combined power supply is performed, selecting all recovery paths with unified voltage levels in the power supply region and recovery paths with unified voltage levels in adjacent power supply regions to be combined until the sum of residual load capacity meets the load demand of the transformer substation to be recovered; the adjacent power supply areas are sequenced according to distances, recovery paths with the same voltage level in the same adjacent power supply area are sequenced according to the residual load capacity, and recovery paths with the same voltage level and large residual load capacity are combined first.
The method for selecting the recovery paths of the transformer substation after tripping of the power grid further comprises the step S7 of selecting a low-voltage side recovery path for recovery when the load demand of the transformer substation to be recovered cannot be met if the power supply is combined across regions, wherein the recovery paths belong to one power supply region firstly to the same power supply region and then to the adjacent power supply region, the capacity is high, the adjacent power supply region is in close priority, if the power supply region cannot be met by the same power supply region and the adjacent power supply region, a combining method is adopted for recovery, and the selection principle of the recovery paths is the same as that of the steps S5-S6.
Embodiment 2, based on embodiment 1, in step S2, if there is a recovery path with a residual available load capacity within 10% in the recovery paths satisfying the load demand; setting the voltage deviation rate of the transformer substation to be recovered as 1, and comparing the voltage deviation rate of the transformer substation to be recovered with the deviation rate of the transformer substation to be recovered under the rated voltage of the transformer substation to be recovered under the condition that power is supplied to each alternative recovery path, wherein the recovery paths with the voltage deviation rate meeting the requirements are prioritized; if there are multiple recovery paths with voltage deviation rates within the acceptable range, selecting according to the impedance of each recovery path, and giving priority to low impedance.
It will be understood that the terms "comprises" and/or "comprising," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The above embodiments are not to be taken in a limiting sense, but rather in an illustrative sense. The scope of the invention is indicated by the appended claims rather than by the foregoing description, and all differences within the scope as would be construed as being included in the present invention. As long as various insubstantial improvements are made using the method concepts and technical solutions of the present invention; or the invention is not improved, and the conception and the technical scheme are directly applied to other occasions and are all within the protection scope of the invention.
Claims (2)
1. A method for selecting a recovery path of a transformer substation after tripping of a power grid is characterized by comprising the following steps of: the method comprises the following steps:
s1, firstly judging whether a recovery path with the same voltage level exists in the same power supply area, and if so, turning to step S2; if not, turning to step S3;
s2, comparing the residual available load capacity of the recovery paths with the same voltage level in the power supply area with the load of the transformer substation to be recovered, screening out recovery paths which do not meet the load demand, defining the recovery paths which meet the load demand as alternative recovery paths, and sorting the alternative recovery paths according to the residual available load capacity, wherein the recovery paths with the residual available load capacity are selected preferentially; if the recovery path meeting the load demand does not exist, the step S3 is carried out;
s3, checking whether the adjacent power supply areas with the same voltage level have recovery paths with the same voltage level, sequencing the adjacent power supply areas with the recovery paths with the same voltage level according to the distance, and turning to the step S4;
s4, checking whether the residual available load capacity exists in the transformer with the voltage level in the adjacent power supply areas according to the sequence of S3, and if the residual available load capacity does not exist, checking the power supply area with the next adjacent voltage level until the residual available load capacity exists or all the adjacent power supply areas are eliminated; if the residual available load capacity exists, checking whether the residual available load capacity meets the requirement of the to-be-recovered power-transformation load, and if the residual available load capacity does not meet the requirement, checking the power supply area of the next adjacent same voltage level until the situation that the residual available load capacity meets the requirement of the to-be-recovered power-transformation load exists or all adjacent power supply areas are eliminated; if the residual available load capacity meets the load requirement of the transformer substation to be recovered, the step S2 is carried out; if a restoration path meeting the load demand does not exist, checking the next adjacent power supply area until the condition that the residual available load capacity meets the load demand of the transformer substation to be restored appears, and switching to S2 or checking all the adjacent power supply areas;
also comprises a step S5, when the alternative recovery paths with the same voltage level are not found in the current power supply area and the adjacent power supply areas,
judging whether the sum of residual load capacities of all the alternative recovery paths in the same power supply area is met, if so, sequencing the recovery paths of the same voltage level according to the residual load capacity, merging and counting the total residual load capacity according to the sequence of the residual load capacity from large to small until the total residual load capacity meets the load requirement of a transformer substation to be recovered, defining a plurality of alternative recovery paths in the merging and counting as final recovery paths, and supplying power together; if not, turning to step S6;
s6, when the sum of the residual load capacities of all recovery paths with the same voltage level in the same power supply area cannot meet the requirement, selecting the recovery paths with the same voltage level in the adjacent power supply areas to perform cross-area combined power supply; when cross-region combined power supply is performed, selecting all recovery paths with the same voltage level in the power supply region and recovery paths with the same voltage level in adjacent power supply regions to be combined until the sum of residual load capacity meets the load demand of the transformer substation to be recovered; the adjacent power supply areas are sequenced according to the distance, recovery paths with the same voltage level in the same adjacent power supply area are sequenced according to the residual load capacity, and recovery paths with the same voltage level and large residual load capacity are selected and combined first;
and S7, if the power supply is combined across areas, and the load requirement of the transformer substation to be recovered cannot be met, selecting a low-voltage side recovery path for recovery, wherein the same power supply area is used for the recovery, then the adjacent power supply area is used for the recovery of the recovery path belonging to one power supply area, the capacity is high, the adjacent power supply area is in close priority, and if the same power supply area and the adjacent power supply area cannot be met, a combining method is adopted, and a plurality of recovery paths are selected for recovery, wherein the selection principle of the plurality of recovery paths is the same as that of the steps S5-S6.
2. The method for selecting a restoration path of a transformer substation after tripping of a power grid according to claim 1, wherein:
in step S2, if there is a recovery path with a residual available load capacity within 10% in the recovery paths satisfying the load demand; setting the voltage deviation rate of the transformer substation to be recovered as 1, and comparing the voltage deviation rate of the transformer substation to be recovered with the deviation rate of the transformer substation to be recovered under the rated voltage of the transformer substation to be recovered under the condition that power is supplied to each alternative recovery path, wherein the recovery paths with the voltage deviation rate meeting the requirements are prioritized; if there are multiple recovery paths with voltage deviation rates within the acceptable range, selecting according to the impedance of each recovery path, and giving priority to low impedance.
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| CN202010793457.8A CN111934316B (en) | 2020-08-10 | 2020-08-10 | Method for selecting recovery path of transformer substation after tripping of power grid |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362615A (en) * | 2014-10-17 | 2015-02-18 | 国家电网公司 | Non-fault segment power supply recovery method based on information platform |
| CN107732910A (en) * | 2017-11-22 | 2018-02-23 | 延海平 | A kind of method of fast recovery of power supply |
| CN110350511A (en) * | 2019-05-23 | 2019-10-18 | 国网河南省电力公司郑州供电公司 | It is a kind of based on turn power supply affinity a distribution network failure restoration methods |
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2020
- 2020-08-10 CN CN202010793457.8A patent/CN111934316B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362615A (en) * | 2014-10-17 | 2015-02-18 | 国家电网公司 | Non-fault segment power supply recovery method based on information platform |
| CN107732910A (en) * | 2017-11-22 | 2018-02-23 | 延海平 | A kind of method of fast recovery of power supply |
| CN110350511A (en) * | 2019-05-23 | 2019-10-18 | 国网河南省电力公司郑州供电公司 | It is a kind of based on turn power supply affinity a distribution network failure restoration methods |
Non-Patent Citations (1)
| Title |
|---|
| 采用动态规划技术实现配电网恢复供电;邓群等;《重庆大学学报(自然科学版)》;20060328(第03期);第40-44页 * |
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