CN111987701B - Power distribution network maintenance method - Google Patents
Power distribution network maintenance method Download PDFInfo
- Publication number
- CN111987701B CN111987701B CN202010842878.5A CN202010842878A CN111987701B CN 111987701 B CN111987701 B CN 111987701B CN 202010842878 A CN202010842878 A CN 202010842878A CN 111987701 B CN111987701 B CN 111987701B
- Authority
- CN
- China
- Prior art keywords
- switch
- reclosing
- information
- equipment
- time limit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/28—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for meshed systems
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The embodiment of the invention discloses a power distribution network maintenance method. The method comprises the following steps: acquiring switch fault message information in a power distribution network; acquiring an ID number of corresponding switch equipment based on the switch fault message; determining whether a constant value notice exists in the switch device based on the ID number; if the fixed value notice exists in the switch equipment, fixed value item information of a preset type in the fixed value notice is acquired; and verifying the automatic protection strategy of the switching equipment based on the fixed value item information and the switching fault message information. The automatic verification of the automatic protection strategy is beneficial to a dispatcher to judge the correctness and the fault section of the protection action more accurately and quickly, is beneficial to arrangement of subsequent fault treatment and power recovery work, provides help for work development of distribution network scheduling, particularly accident treatment, operation mode change and other work, and meanwhile, the automatic verification of the protection strategy can check the accuracy of field constant value execution, reduce the work repeatability and realize the effects of resource sharing maximization and multi-professional win-win.
Description
Technical Field
The embodiment of the invention relates to the technical field of power equipment, in particular to a power distribution network maintenance method.
Background
Along with the improvement of the distribution network automation level, a large amount of investment of distribution network automation strategies provides a foundation for realizing quick automatic fault point judgment, fault section isolation and non-fault section power supply recovery.
The verification of the current protection strategy needs to depend on the accuracy of the manual verification of the device constant value execution by the field operation and maintenance personnel, and on one hand, professional levels of field operation and maintenance personnel are uneven, so that the accuracy of the verification of the protection strategy is influenced; on the other hand, there are also problems such as a large amount of work and low work efficiency. And the constant value notice sheet is updated every time the distribution network is updated, operation and maintenance personnel are required to check the constant value accuracy of the equipment on site, and the work has repeatability.
Disclosure of Invention
The embodiment of the invention provides a power distribution network maintenance method, which aims to improve the maintenance and overhaul efficiency of a power distribution network.
In a first aspect, an embodiment of the present invention provides a method for maintaining a power distribution network, where the method is performed by an SCADA server, and the method includes:
acquiring switch fault message information in a power distribution network;
based on the switch fault message information acquiring an ID number of a corresponding switch device;
determining whether a fixed value notice exists for the switching device based on the ID number;
if the fixed value notice exists in the switch equipment, acquiring fixed value item information of a preset type in the fixed value notice;
and verifying the automatic protection strategy of the switch equipment based on the fixed value item information and the switch fault message information.
Optionally, the fixed value item information of the preset type at least includes: the protection type of the switching device, the X time limit of the switching device, the Z time limit of the switching device and reclosing information of the switching device, wherein the reclosing information comprises reclosing action information and reclosing time limit information.
Optionally, the protection types of the switching device include a smart distribution type, a voltage current type and a conventional current type.
Alternatively to this, the first and second parts may, the automatic protection strategy of the switch device is verified based on the fixed value item information, the method comprises the following steps:
if the protection type of the switch device is intelligent distributed, comparing the Z time limit of the switch device with a preset first switch setting value;
if the Z time limit is less than or equal to the first switch setting value, determining whether a reclosing function of the switching equipment is put into operation or not based on the reclosing information;
if the reclosing of the switching equipment is put into operation, acquiring reclosing action information and reclosing time limit information in the reclosing information;
if the reclosing action is determined to be correct based on the reclosing action information, comparing the reclosing time limit with a preset second switch setting value;
if the reclosing time limit is less than or equal to the second switch setting value, determining that the automatic protection strategy of the switching equipment is correct;
otherwise, if the Z time limit is greater than the first switch setting value, or the reclosing does not act correctly, or the reclosing acts correctly but the reclosing time limit is greater than the second switch setting value, determining that the automatic protection strategy of the switching equipment is wrong, and outputting alarm information for protecting the logic abnormity.
Optionally, the verifying the automation protection policy of the switchgear based on the fixed value item information includes:
if the protection type of the switch equipment is a voltage current type, comparing the Z time limit of the switch equipment with a preset first switch setting value;
if the Z time limit is less than or equal to the first switch setting value, comparing the X time limit of the switch equipment with a preset third switch setting value;
if the X time limit is less than or equal to the third switch setting value, determining that the automatic protection strategy of the switch equipment is correct;
otherwise, if the Z time limit is greater than the first switch setting value or the X time limit is greater than the third switch setting value, determining that the automation protection strategy of the switch equipment is wrong, and outputting alarm information of protection logic abnormity.
Optionally, the automatic protection strategy of the switch device is verified based on the fixed value item information, the method comprises the following steps:
if the protection type of the switching equipment is a conventional current type, determining whether a reclosing function of the switching equipment is put into operation or not based on the reclosing information;
if the reclosing of the switching equipment is put into operation, acquiring reclosing action information and reclosing time limit information in the reclosing information;
if the correct reclosing action is determined based on the reclosing action information, comparing the reclosing time limit with a preset second switch setting value;
if the reclosing time limit is less than or equal to the second switch setting value, determining that an automatic protection strategy of the switch device is correct;
otherwise, if the reclosing does not act correctly, or the reclosing does act correctly but the reclosing time limit is greater than the second switch setting value, determining that the automatic protection strategy of the switching equipment is wrong, and outputting alarm information of abnormal protection logic.
Optionally, the first switch setting value is determined according to the following formula:
Z t ＝(T Oi -T O )*t λ1 (1)
in the formula: z t Setting a value for the first switch; t is Oi The occurrence time of the opening message of the protection action of the switching equipment in the station is determined; t is O Opening message occurrence time for the target switch equipment; t is t λ1 Is the first time margin.
Optionally, the second switch setting value is determined according to the following formula:
R t ＝(T R -T O )*t λ2 (2)
in the formula: r is t Setting the second switch value; t is R Generating time for a reclosing action message of the target switching equipment; zxfoom T O Opening message generation time for target switch equipment; t is t λ2 Is the second time margin.
Optionally, the third switch setting value is determined according to the following formula:
X t ＝(T C -T F )*t λ3 (3)
in the formula: x t Is the first setting a three-switch; t is C Switching-on message occurrence time of the target switch equipment; t is F The occurrence time of a closing message of a superior switching device of the target switching device is set; t is t λ3 Is the third time margin.
Optionally, after the information of the switch fault message in the power distribution network is obtained, the method further includes:
and acquiring equipment card information of the switching equipment so as to display the type of the switching equipment and a fixed value notice associated with the switching equipment through a preset equipment item in the equipment card information.
In the power distribution network maintenance method provided by the embodiment of the invention, the SCADA server extracts the ID number of the switch equipment from the switch fault message information, the ID number of the switch equipment is associated with the fixed value notice of the switch equipment, and then the fixed value item of a preset type is obtained from the fixed value notice, wherein the fixed value item of the preset type reflects the time of the switch equipment which needs to realize action when the power distribution network is in fault. The SCADA server calculates the extracted message occurrence time of the corresponding switch equipment according to a set algorithm, and compares the calculation result with the corresponding fixed value item information in the fixed value notice sheet, so as to verify whether the switch equipment acts correctly according to the setting requirement, namely whether the automatic protection strategy of the switch equipment is correctly realized. The automatic verification of the automatic protection strategy of the switch equipment is beneficial to a dispatcher to judge the correctness and fault sections of the protection action more accurately and quickly, the arrangement of subsequent fault treatment and power recovery work is facilitated, and the assistance is provided for the work of distribution network scheduling development, especially the work of accident treatment, operation mode change and the like.
Drawings
Fig. 1 is a flowchart of a power distribution network maintenance method according to an embodiment of the present invention;
fig. 2 is a flowchart of another power distribution network maintenance method according to an embodiment of the present invention;
fig. 3 is a flowchart of another power distribution network maintenance method according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention, and not as restrictive. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
At present, with the large commissioning of a switch protection strategy of a power Distribution network, only part of switches in a Distribution Management System (DMS) show switch types and protection types in a manual labeling manner, so that the problems of large manual maintenance amount, untimely and inaccurate updating and the like exist, and inconvenience is brought to a dispatcher in carrying out work such as accident handling and operation mode change. Meanwhile, the calibration of the switch protection strategy needs to depend on the field operation and maintenance personnel to manually check the accuracy of the fixed value execution of the switch equipment, so that the problems of large workload, low working efficiency and the like of the field operation and maintenance personnel exist, and meanwhile, the calibration accuracy of the switch protection strategy is influenced due to the fact that the professional levels of the field operation and maintenance personnel are uneven. And each time the fixed value notice is updated, operation and maintenance personnel need to check the fixed value accuracy of the switch equipment on site, and the problem of repeated work exists. In order to solve the above problems, embodiments of the present invention provide a method for maintaining a power distribution network, so as to overcome the defects in the prior art. The method for maintaining the power distribution network is further described below with reference to the accompanying drawings.
Fig. 1 is a flowchart of a power distribution network maintenance method according to an embodiment of the present invention, where the method is applicable to a situation where an accident is handled on a power distribution network, for example, automatic verification is performed on a switching device in the power distribution network to correctly determine a power distribution network segment with a fault. The method can be executed by an SCADA (Supervisory Control And Data Acquisition, data Acquisition And monitoring Control system) server in a power distribution management system, and referring to fig. 1, the method for maintaining the power distribution network includes the following steps:
s110, obtaining switch fault message information in the power distribution network.
When a protection action switch in the power Distribution network is switched on and off, a DMS (Distribution Management System) alarms to send out switch fault message information. And the SCADA server acquires the information of the switch fault message in the power distribution network through the front-end acquisition server.
And S120, acquiring the ID number of the corresponding switch device based on the switch fault message information.
The ID number of the switching device is an identification number of the switching device, which is a unique identification of the switching device in the power distribution network, that is, each switching device uniquely corresponds to an ID number.
And S130, determining whether the switch equipment has a constant value notice or not based on the ID number.
In the embodiment, the ID number of the switching device is used as an intermediary, and the ID number of the switching device is associated with the fixed-value notice of the switching device, so that the SCADA server can determine whether the fixed-value notice exists in the switching device according to the ID number of the switching device. And then the SCADA server verifies the automatic protection strategy of the switch equipment based on the corresponding constant value item in the constant value notice of the switch equipment.
In one embodiment, the switching device is controlled by associating the ID number of the switching device with a device card of the switching device, associating the device card with an order notice through the ID number, therefore, the SCADA server determines whether the fixed value notice exists in the switch equipment or not by acquiring the equipment card information based on the ID number.
S140, if the fixed value notice exists in the switch device, the fixed value item information of the preset type in the fixed value notice is obtained.
Wherein, the SCADA server can automatically search the fixed value key words in the fixed value notice, thereby obtaining the fixed value item information of the preset type. The preset type of fixed value item information reflects the action process of the switch device when the switch device is in fault.
In one embodiment, the predetermined type of fixed value item information at least includes: the protection type of the switching device, the X time limit of the switching device, the Z time limit of the switching device and reclosing information of the switching device, wherein the reclosing information comprises reclosing action information and reclosing time limit information.
Optionally, the protection types of the switching device include a smart distribution type, a voltage current type, and a conventional current type.
S150, verifying the automatic protection strategy of the switch equipment based on the fixed value item information and the switch fault message information.
When the power distribution network fails, the automatic switch equipment acts according to a set protection strategy, and the relevant fixed value items in the fixed value notice record the time when the automatic switch equipment needs to act, which is equivalent to theoretical action time. In the implementation, the SCADA server extracts the message occurrence time of the associated switch device according to the protection type of the switch device, and calculates the actual time of the switch device for action based on the message occurrence time based on a set strategy, that is, the actual action time, and meanwhile, the SCADA server extracts the fixed value item information in the fixed value notice sheet, because the fixed value item information reflects the theoretical action time of the switch device, the SCADA server compares the theoretical action time of the switch device with the actual action time of the switch device, so as to implement automatic verification of the automatic protection strategy of the switch device, and determine whether the automatic protection strategy of the switch device is correctly implemented.
The working principle of the power distribution network maintenance method is as follows: and the ID number of the switch equipment is associated with the fixed value notice of the switch equipment, so that the ID number of the switch equipment is automatically associated with the corresponding fixed value notice according to the switch fault message information, and the automatic protection strategy of the switch equipment is verified based on the fixed value item information of the preset type in the fixed value notice.
In the power distribution network maintenance method provided by the embodiment of the invention, the SCADA server extracts the ID number of the switch equipment from the switch fault message information, the ID number of the switch equipment is associated with the fixed value notice of the switch equipment, and then the fixed value item of a preset type is obtained from the fixed value notice, wherein the fixed value item of the preset type reflects the time of the switch equipment which needs to realize action when the power distribution network is in fault. The SCADA server calculates the extracted message occurrence time of the corresponding switch equipment according to a set algorithm, and compares the calculation result with the corresponding fixed value item information in the fixed value notice sheet, so as to verify whether the switch equipment acts correctly according to the setting requirement, namely whether the automatic protection strategy of the switch equipment is correctly realized. The automatic verification of the automatic protection strategy of the switch equipment is beneficial to a dispatcher to judge the correctness and fault sections of the protection action more accurately and quickly, the arrangement of subsequent fault treatment and power recovery work is facilitated, and the assistance is provided for the work of distribution network scheduling development, especially the work of accident treatment, operation mode change and the like.
Optionally, on the basis of the above technical solution, after the switch fault message information in the power distribution network is acquired, the method further includes:
and acquiring equipment card information of the switch equipment so as to display the type of the switch equipment and a constant value notice sheet of the associated switch equipment through a preset equipment item in the equipment card information.
Specifically, the preset device items in the device card information include two device items, namely "automatic switch on/off and" fixed value notification ". Whether this embodiment is through adding "whether automation switch" item in the equipment card and directly perceivedly show whether switchgear possesses automatic function, and this content is set for when manual entry equipment card ledger. And associating the constant value notice of the switch device by adding a new constant value notice item. When the "if automatic switching" device item shows "yes", the type of the switching device is an automatic switch; when the "do not automate switch" device item is displayed as "no", the type of the switch device is a non-automated switch.
When the fixed value notice exists in the switch equipment, the corresponding fixed value notice is automatically associated in the equipment card of the switch equipment, and a dispatcher can acquire the fixed value item information of the switch equipment by clicking the hyperlink of the equipment item, namely the fixed value notice in the equipment card.
In the embodiment, the ID number of the switching equipment is used as an intermediary, each fixed value notice is associated with the switching equipment corresponding to the ID, the uniqueness is realized, the bidirectional association between the fixed value notice and the equipment ID and the bidirectional association between the equipment ID and the equipment card are realized, a column of a newly added fixed value notice in the equipment card is displayed, a dispatcher can inquire the fixed value item details in the fixed value notice by clicking a hyperlink in the column of the fixed value notice in the equipment card, the information is written in the equipment card of the switching equipment and is not changed due to the fault change of the power distribution network, namely, when any type of fault occurs at any time, whether the switching equipment has an automation function or not and the fixed value notice information of the switching equipment can be automatically displayed, so that convenience is provided for the dispatcher to process the faults, operation mode change and the like of the power distribution network fault. Meanwhile, the SCADA server can also automatically retrieve the corresponding fixed value item key words in the fixed value list, and the requirements of quickly retrieving related protection fixed value items in accident handling and the like are met.
Optionally, fig. 2 is a flowchart of another power distribution network maintenance method provided in an embodiment of the present invention, and the implementation further optimizes a process of performing automatic verification on an automatic protection policy of a switching device on the basis of the above embodiment, and with reference to fig. 2, the method specifically includes the following steps:
s210, obtaining switch fault message information in the power distribution network.
S220 and acquiring the ID number of the corresponding switch device based on the switch fault message information.
And S230, determining whether the switch equipment has a constant value notice or not based on the ID number.
S240, if the fixed value notice exists in the switch equipment, fixed value item information of a preset type in the fixed value notice is obtained.
The SCADA server can automatically retrieve the corresponding fixed value item keywords in the fixed value notice, and then the automatic protection strategy of the switch equipment is verified through the fixed value item keywords.
And S250, if the protection type of the switch equipment is intelligent distributed, comparing the Z time limit of the switch equipment with a preset first switch setting value.
The first switch setting value is determined according to the following formula:
Z t ＝(T Oi -T O )*t λ1 (1)
in the formula: z t Setting a first switch value; t is a unit of Oi The occurrence time of the opening message of the protection action of the switching equipment in the station is determined; t is a unit of O Opening message generation time for a target switch device (namely the automatic switch device); t is t λ1 Is the first time margin.
Based on the DMS system priority search algorithm, the SCADA server can topologically connect the in-station switch device (namely, a power switch) to each path of the off-station switch device according to a single line diagram path, so that when the off-station automatic switch device is switched off, the SCADA server can automatically search the in-station switch device (namely, the power switch) of the SCADA server, and accordingly, the in-station switch device protection action switching-off message of the ID in the alarm item and the occurrence time T of the in-station switch device protection action switching-off message are searched by correlating the ID of the switch device Oi 。
In this embodiment, the in-station switch device may be associated with the out-station switch and each out-station switch through an attribute relationship of the device tree.
The first time margin in the above equation is a tolerance coefficient set in consideration of a transmission delay and a short-time channel anomaly problem which may exist in the power distribution network. In one embodiment, the first time margin is set to 1.2s.
And S251, if the Z time limit is less than or equal to the first switch setting value, determining whether the reclosing function of the switch equipment is put into operation or not based on the reclosing information.
The SCADA server can acquire whether the reclosing function of the switch equipment is input or not by searching a fixed value key word of whether the reclosing function is input or not.
And S252, if the reclosure of the switch device is put into operation, acquiring reclosure action information and reclosure time limit information in the reclosure information.
The reclosing information also comprises reclosing action information and reclosing time limit information. The reclosing action information is used for representing whether the switching equipment carries out reclosing action according to the set protection logic. The reclosing time limit information represents how long the switching equipment carries out reclosing action after the fault occurs.
And S253, if the reclosure correct action is determined based on the reclosure action information, comparing the reclosure time limit with a preset second switch setting value.
The second switch setting value is determined according to the following formula:
R t ＝(T R -T O )*t λ2 (2)
in the formula: r t Setting a second switch; t is a unit of R Reclosing action message occurrence time for a target switchgear (i.e., the present automation switchgear); t is a unit of O The occurrence time of the opening message of the target switch device (namely the automatic switch device); t is t λ2 Is the second time margin.
Similarly, the second time margin is a tolerance coefficient set in consideration of a transmission delay and a channel short-time anomaly problem which may exist in the power distribution network. The second time margin may be set to coincide with the first time margin in the same power distribution management system.
And S254, if the reclosing time limit is less than or equal to the second switch setting value, determining that the automatic protection strategy of the switch equipment is correct.
Specifically, if the reclosing time limit is less than or equal to the second switch setting value, it indicates that the switching device puts reclosing into operation according to the set protection logic within the specified time, and the intelligent distributed switching device performs protection operation within the specified Z time limit, so that the SCADA server determines that the intelligent distributed switching device correctly operates according to the setting requirement, that is, the automatic protection strategy of the switching device is correctly implemented.
And S255, otherwise, if the Z time limit is greater than the first switch setting value, or the reclosing does not act correctly, or the reclosing acts correctly but the reclosing time limit is greater than the second switch setting value, determining that the automatic protection strategy of the switch equipment is wrong, and outputting alarm information for protecting the logic abnormity.
In the intelligent distributed protection type, if the Z time limit of the switch equipment is larger than a first switch setting value, or the reclosing does not act correctly, or although the reclosing does act correctly but the reclosing action time limit is larger than a second switch setting value, the switch equipment is indicated to fail to act correctly according to the setting requirement, and the SCADA server determines that the automatic protection strategy of the switch equipment at the moment is wrong, namely the automatic protection strategy of the switch equipment is not correctly realized.
Meanwhile, the SCADA server outputs alarm information of the protection logic abnormity to remind a dispatcher of the protection logic abnormity of the switch device, and the alarm information can be output in a popup mode for example. The dispatcher can directly position the switching equipment with the fault based on the alarm information, so that the switching equipment in a fault power distribution network segment does not need to be checked one by one, the fault checking and processing time is shortened, and the accident processing efficiency is greatly improved. Meanwhile, the influence of field operation and maintenance personnel on the accuracy of the protection strategy verification of the switch equipment due to professional level limitation is avoided. Furthermore, when the distribution network updates the fixed value notice, the SCADA server can automatically perform protection logic verification, so that operation and maintenance personnel are not required to check the fixed value accuracy of each intelligent distributed switch device on site, and repeated work is avoided.
And S260, if the protection type of the switch equipment is a voltage current type, comparing the Z time limit of the switch equipment with a preset first switch setting value.
Under the voltage and current type protection type, the SCADA server needs to respectively judge whether the Z time limit and the X time limit of the switch device meet the requirement of a setting value.
And S261, if the Z time limit is smaller than or equal to the first switch setting value, comparing the X time limit of the switch equipment with a preset third switch setting value.
When the Z time limit is less than or equal to the first switch setting value, the switch equipment is indicated to perform protection action within the specified Z time limit, and the SCADA server further judges whether the switch equipment performs protection action within the specified X time limit.
It should be noted that, in this embodiment, the SCADA server may also determine whether the switch device operates correctly within a specified X time limit, and then determine whether the switch device operates correctly within a specified Z time limit, and this embodiment does not limit the checking order of the fixed value item information of the switch device.
And S262, if the X time limit is less than or equal to the third switch setting value, determining that the automatic protection strategy of the switch equipment is correct.
If the X time limit is less than or equal to the third switch setting value, the switch device is indicated to perform protection action within the specified X time limit, and the switch device also performs protection action within the specified Z time limit, so that the SCADA server determines that the voltage current type switch device performs automatic opening and closing action within the specified action time, and the automatic protection strategy of the voltage current type switch device is in accordance with requirements.
In one embodiment, the third switch setting is determined according to the following formula:
X t ＝(T C -T F )*t λ3 (3)
in the formula: x t Setting a value for the third switch; t is a unit of C The occurrence time of a closing message for a target switching device (namely the automatic switching device); t is F The occurrence time of a closing message of a superior switching device of a target switching device (i.e., the present automatic switching device); t is t λ3 Is the third time margin.
The third time margin is also a tolerance coefficient set by considering the transmission delay and the short-time abnormal problem of the channel which may exist in the power distribution network. The third time margin may be set to be the same as the first time margin and/or the second time margin in the same power distribution management system.
And S263, otherwise, if the Z time limit is greater than the first switch setting value or the X time limit is greater than the third switch setting value, determining that the automatic protection strategy of the switch equipment is wrong, and outputting alarm information for protecting the logic abnormity.
Specifically, if the Z time limit is greater than the first switch setting value or the X time limit is greater than the third switch setting value, indicating that the voltage-current type switching device fails to operate correctly according to the setting requirement, the SCADA server determines that the automatic protection strategy of the voltage-current type switching device is incorrect, that is, the automatic protection strategy of the switching device is not correctly implemented.
Meanwhile, the SCADA server can output alarm information in a popup mode to inform a dispatcher that the automatic protection logic of the switch device is abnormal through the alarm information, and the dispatcher can accurately position the voltage and current type switch device with problems based on the alarm information, so that the troubleshooting time is shortened, and the accident processing efficiency is improved.
And S270, if the protection type of the switch device is a conventional current type, determining whether a reclosing function of the switch device is put into operation or not based on reclosing information.
For the conventional current type switch equipment, the SCADA server only needs to judge reclosing information, but does not need to judge Z time limit information and X time limit information.
And S271, if the reclosure of the switch device is put into operation, acquiring reclosure action information and reclosure time limit information in the reclosure information.
When the reclosing of the switching equipment is put into operation, the reclosing action information and the reclosing time limit information are used for judging whether an automatic protection strategy of the conventional current type switching equipment is correct or not. Specifically, the reclosing action information is used for representing whether the switching device carries out reclosing action according to the set protection logic. The reclosing time limit information represents how long the reclosing action of the switching device is performed after the fault occurs.
And S272, if the reclosing correct action is determined based on the reclosing action information, comparing the reclosing time limit with a preset second switch setting value.
The second switch setting value is calculated according to formula (2) in this embodiment.
And S273, if the reclosing time limit is less than or equal to the second switch setting value, determining that the automatic protection strategy of the switch device is correct.
If the reclosing time limit is less than or equal to the second switch setting value, the conventional current type switch equipment is indicated to act according to the setting requirement, namely the automatic protection strategy of the conventional current type switch equipment is correct.
And S274, otherwise, if the reclosing does not act correctly, or the reclosing does act correctly but the reclosing time limit is greater than the second switch setting value, determining that the automatic protection strategy of the switching equipment is wrong, and outputting alarm information for protecting the logic abnormity.
If the reclosing action information determines that the reclosing of the switching equipment does not act correctly, or the reclosing acts correctly but the reclosing action time is longer than a second switch setting value, the SCADA server determines that the conventional current type switching equipment cannot act according to the setting requirement, namely the automatic protection strategy of the conventional current type switching equipment is not correctly realized. At the moment, the SCADA server outputs alarm information of abnormal protection to remind a dispatcher of abnormal protection logic of the switch equipment, and the dispatcher can directly position the switch equipment with problems, so that the efficiency of accident handling of the power distribution network is improved.
This implementation refines through the protection type to switchgear, formulate corresponding automatic check strategy to different protection types, the automatic check strategy of the switchgear of different grade type is carried out the automatic check to the SCADA server through carrying out the automatic check strategy that corresponds, when the automatic check is unqualified, the SCADA server outputs warning information and pops the window and warns, thereby the dispatcher accessible should report an emergency and ask for help or increased vigilance information directly finds the switchgear that has the problem, the investigation one by one to trouble distribution network section has been avoided, thereby the efficiency to distribution network incident processing has been improved. Meanwhile, the SCADA server automatically checks the automatic protection strategies of different types of switch equipment by executing the corresponding automatic checking strategies, so that the influence of personnel factors is avoided, and the accuracy and the reliability of diagnosis are improved. Meanwhile, after the fixed value notice is updated on the power distribution network, the SCADA server can automatically perform protection logic verification on the switch equipment, operation and maintenance personnel do not need to verify the fixed value accuracy one by one on site, repeated work is avoided, the manpower and material resource cost for maintaining the power distribution network is saved, and the effects of resource sharing maximization and multi-professional win-win are achieved.
Optionally, fig. 3 is a flowchart of another power distribution network maintenance method provided in the embodiment of the present invention. Referring to fig. 3, the method for maintaining the power distribution network specifically includes the following steps:
and S310, starting.
And S320, sending 'switching fault opening' by the DMS system alarm message.
And S330, associating the switch equipment ID.
And S340, associating the ID equipment ledger and fixed value notice information.
And S350, judging whether a fixed-value notice exists or not.
If a fixed-value notice exists, the step S360 is executed; if there is no fixed-value notice, the process proceeds to step S380.
And S360, performing protection type keyword retrieval, Z time limit keyword retrieval, X time limit keyword retrieval and reclosing keyword retrieval in the constant value notice.
Wherein the protection type of the switching device is determined by a protection type key retrieval. The protection types comprise three protection types of intelligent distribution type, voltage current type and conventional current protection.
And acquiring the X time limit and/or Z time limit action time of the switch equipment through the retrieval of the X time limit and Z time limit keywords.
And determining whether the reclosing function of the switching equipment is put into operation or not through the retrieval of the reclosing keyword, and further acquiring reclosing action information and reclosing time limit information under the condition that the reclosing is put into operation. If the reclosing operation is in the on-stream state, the process proceeds to step S380.
And S370, acquiring the protection type of the switch device.
If the protection type is intelligent distributed, go to step S371;
if the protection type is a voltage current type, go to step S373;
if the protection type is the normal current protection type, the process proceeds to step S376.
And S371, if the protection type of the switch device is intelligent distributed, applying a first DMS message and a first verification algorithm.
The first DMS message comprises an in-station switch equipment protection action opening message and an automatic switch equipment opening message. The first verification algorithm specifically comprises:
Z t ＝(T Oi -T O )*t λ1 (1)
in the formula: z t The first switch setting value is a Z time limit setting value; t is Oi The occurrence time of the opening message of the protection action of the switching equipment in the station; t is O Opening message generation time for the automatic switch equipment; t is t λ1 Is a first time margin.
And S372, comparing whether the Z time limit operates correctly.
And (3) comparing the action time calculated by the formula (1) with the action time recorded by the Z time limit to determine whether the Z time limit of the switch equipment acts correctly.
If the Z time limit is correctly operated, the process proceeds to step S373; otherwise, step S379 is advanced.
S373, if the protection type of the switch device is a voltage current type, applying a first DMS message and a first verification algorithm.
S374, whether the Z time limit operates correctly is compared.
If the Z time limit is correct, the process goes to step S375; otherwise, the process advances to step S379.
S375, comparing whether the X time limit operates correctly.
And applying a second DMS message and a second checking algorithm, wherein the second message comprises a closing message of the automatic switching equipment and a closing message of a superior switching equipment of the automatic switching equipment. The second checking algorithm specifically comprises:
X t ＝(T C -T F )*t λ3 (3)
in the formula: x t Setting a third switch, namely an X time limit setting value; t is C The occurrence time of the switching-on message of the automatic switch equipment is shown; t is a unit of F The occurrence time of a closing message of the superior switching equipment of the automatic switching equipment is shown; t is t λ3 Is the third time margin.
And (3) comparing the action time calculated by the formula (2) with the action time recorded by the X time limit to determine whether the X time limit of the switch equipment acts correctly. If the X time limit is correct, the process goes to step S380; otherwise, the process advances to step S379.
And S376, if the protection type of the switch device is a conventional current protection type, applying a third DMS message and a third verification algorithm.
The third DMS message includes a reclosing action message of the automatic switching device and an opening message of the automatic switching device. The third verification algorithm specifically comprises:
R t ＝(T R -T O )*t λ2 (2)
in the formula: r t Setting a second switch setting value, namely a reclosing time limit setting value; t is R The occurrence time of the reclosing action message of the automatic switch equipment is determined; t is O Opening message generation time for the automatic switch equipment; t is t λ2 Is the second time margin.
And S377, judging whether the reclosure operates correctly.
Determining whether the reclosing of the automatic switching equipment acts correctly or not according to the reclosing action information, and if the reclosing acts correctly, entering a step S378; otherwise, the process advances to step S379.
And S378, judging whether the reclosing time limit operates correctly.
Determining whether the reclosing time limit acts correctly or not according to the reclosing time limit information, and if the reclosing time limit acts correctly, entering the step S380; otherwise, the process advances to step S379.
And S379, giving an alarm by a DMS popup.
DMS pops the window to alarm, and prompts the protection logic to be abnormal.
And S380, ending.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A method for maintaining a power distribution network, the method being performed by a SCADA server, the method comprising:
acquiring switch fault message information in a power distribution network;
acquiring an ID number of corresponding switch equipment based on the switch fault message information;
determining whether a fixed value notice exists for the switching device based on the ID number;
if the switch equipment has a fixed value notice, acquiring fixed value item information of a preset type in the fixed value notice;
verifying the automation protection strategy of the switch equipment based on the fixed value item information and the switch fault message information;
wherein the protection types of the switch device comprise intelligent distribution type, voltage current type and conventional current type;
wherein the verifying the automation protection strategy of the switchgear based on the fixed value item information comprises:
if the protection type of the switch equipment is intelligent distributed, comparing the Z time limit of the switch equipment with a preset first switch setting value;
if the Z time limit is less than or equal to the first switch setting value, determining whether a reclosing function of the switching equipment is put into operation or not based on reclosing information;
if the reclosing of the switching equipment is put into operation, acquiring reclosing action information and reclosing time limit information in the reclosing information;
if the reclosing action is determined to be correct based on the reclosing action information, comparing the reclosing time limit with a preset second switch setting value;
if the reclosing time limit is less than or equal to the second switch setting value, determining that an automatic protection strategy of the switch device is correct;
otherwise, if the Z time limit is greater than the first switch setting value, or the reclosing does not act correctly, or the reclosing acts correctly but the reclosing time limit is greater than the second switch setting value, determining that the automatic protection strategy of the switching equipment is wrong, and outputting alarm information for protecting the logic abnormity.
2. The method for maintaining the power distribution network according to claim 1, wherein the preset type of fixed value item information at least comprises: the protection type of the switching device, the X time limit of the switching device, the Z time limit of the switching device and reclosing information of the switching device, wherein the reclosing information comprises reclosing action information and reclosing time limit information.
3. The method for maintaining the power distribution network according to claim 1, wherein the verifying the automation protection strategy of the switchgear based on the fixed value item information comprises:
if the protection type of the switch device is a voltage current type, comparing the Z time limit of the switch device with a preset first switch setting value;
if the Z time limit is less than or equal to the first switch setting value, comparing the X time limit of the switch equipment with a preset third switch setting value;
if the X time limit is less than or equal to the third switch setting value, determining that the automatic protection strategy of the switch equipment is correct;
otherwise, if the Z time limit is greater than the first switch setting value or the X time limit is greater than the third switch setting value, determining that the automatic protection strategy of the switch equipment is wrong, and outputting alarm information for protecting logic abnormity.
4. The method for maintaining the power distribution network according to claim 1, wherein the verifying the automation protection strategy of the switchgear based on the fixed value item information comprises:
if the protection type of the switching equipment is a conventional current type, determining whether a reclosing function of the switching equipment is put into operation or not based on the reclosing information;
if the reclosing of the switching equipment is put into operation, acquiring reclosing action information and reclosing time limit information in the reclosing information;
if the correct reclosing action is determined based on the reclosing action information, comparing the reclosing time limit with a preset second switch setting value;
if the reclosing time limit is less than or equal to the second switch setting value, determining that the automatic protection strategy of the switching equipment is correct;
otherwise, if the reclosure does not act correctly, or the reclosure acts correctly but the reclosure time limit is larger than the second switch setting value, determining that the automatic protection strategy of the switch device is wrong, and outputting alarm information of abnormal protection logic.
5. The method for maintaining a power distribution network according to claim 1 or 3, wherein the first switch setting value is determined according to the following formula:
Z t ＝(T Oi -T O )*t λ1 (1)
in the formula: z t Setting the first switch value; t is Oi The occurrence time of the opening message of the protection action of the switching equipment in the station is determined; t is O Opening message occurrence time for the target switch equipment; t is t λ1 Is a first time margin.
6. The method for maintaining a power distribution network according to claim 1 or 4, wherein the second switch setting value is determined according to the following formula:
R t ＝(T R -T O )*t λ2 (2)
in the formula: r is t Setting a value for the second switch; t is a unit of R The occurrence time of a reclosing action message of the target switch device is obtained; t is O Opening message occurrence time for the target switch equipment; t is t λ2 Is the second time margin.
7. The method of claim 3, wherein the third switch setting is determined according to the following equation:
X t ＝(T C -T F )*t λ3 (3)
in the formula: x t Setting a value for the third switch; t is C Switching-on message occurrence time of the target switch equipment; t is F The occurrence time of a closing message of a superior switching device of the target switching device is set; t is t λ3 Is the third time margin.
8. The method of claim 1, wherein after the obtaining of the switch fault message information in the power distribution network, the method further comprises:
and acquiring equipment card information of the switching equipment so as to display the type of the switching equipment and a fixed value notice associated with the switching equipment through a preset equipment item in the equipment card information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010842878.5A CN111987701B (en) | 2020-08-20 | 2020-08-20 | Power distribution network maintenance method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010842878.5A CN111987701B (en) | 2020-08-20 | 2020-08-20 | Power distribution network maintenance method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111987701A CN111987701A (en) | 2020-11-24 |
| CN111987701B true CN111987701B (en) | 2023-02-17 |
Family
ID=73443998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010842878.5A Active CN111987701B (en) | 2020-08-20 | 2020-08-20 | Power distribution network maintenance method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111987701B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009115921A2 (en) * | 2008-02-22 | 2009-09-24 | Ipath Technologies Private Limited | Techniques for enterprise resource mobilization |
| CN101980263A (en) * | 2010-10-22 | 2011-02-23 | 河南省电力公司平顶山供电公司 | Method for setting value of relay protection |
| CN103414169A (en) * | 2013-08-29 | 2013-11-27 | 国家电网公司 | Relay protection and error prevention system based on power grid dispatching automation system and working method |
| CN103514516A (en) * | 2013-09-27 | 2014-01-15 | 国家电网公司 | Method for obtaining power grid device failure information based on calculation of multi-source redundant information |
| CN105741039A (en) * | 2014-08-08 | 2016-07-06 | 国网山东省电力公司青岛供电公司 | Setting management method and system of dividing switch of 10 kV distribution line |
| CN107863748A (en) * | 2017-11-28 | 2018-03-30 | 国网福建省电力有限公司 | A kind of method based on the distant place modification of power distribution automation protection definite value |
| CN111509660A (en) * | 2020-04-30 | 2020-08-07 | 广东电网有限责任公司 | Protection constant value intelligent setting system based on distribution network line |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060098660A1 (en) * | 2004-11-10 | 2006-05-11 | Rajesh Pal | Mechanism for automatic protection switching and apparatus utilizing same |
| US8514104B1 (en) * | 2009-06-12 | 2013-08-20 | Rockwell Collins, Inc. | Integrated minimum equipment decision support system |
| CN103066700B (en) * | 2012-12-19 | 2014-09-17 | 云南电力调度控制中心 | Power grid fault information processing method and system |
| CN103543383A (en) * | 2013-08-07 | 2014-01-29 | 国家电网公司 | Method for locating faults of power distribution network on basis of complaint telephone and protection information |
| CN109004631B (en) * | 2018-07-13 | 2020-02-14 | 深圳供电局有限公司 | Network-based power distribution network self-adaptive backup protection control method |
| CN110850232B (en) * | 2019-11-13 | 2021-10-01 | 云南电网有限责任公司 | Power grid fault diagnosis system and method based on relay protection auxiliary decision system |
-
2020
- 2020-08-20 CN CN202010842878.5A patent/CN111987701B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009115921A2 (en) * | 2008-02-22 | 2009-09-24 | Ipath Technologies Private Limited | Techniques for enterprise resource mobilization |
| CN101980263A (en) * | 2010-10-22 | 2011-02-23 | 河南省电力公司平顶山供电公司 | Method for setting value of relay protection |
| CN103414169A (en) * | 2013-08-29 | 2013-11-27 | 国家电网公司 | Relay protection and error prevention system based on power grid dispatching automation system and working method |
| CN103514516A (en) * | 2013-09-27 | 2014-01-15 | 国家电网公司 | Method for obtaining power grid device failure information based on calculation of multi-source redundant information |
| CN105741039A (en) * | 2014-08-08 | 2016-07-06 | 国网山东省电力公司青岛供电公司 | Setting management method and system of dividing switch of 10 kV distribution line |
| CN107863748A (en) * | 2017-11-28 | 2018-03-30 | 国网福建省电力有限公司 | A kind of method based on the distant place modification of power distribution automation protection definite value |
| CN111509660A (en) * | 2020-04-30 | 2020-08-07 | 广东电网有限责任公司 | Protection constant value intelligent setting system based on distribution network line |
Non-Patent Citations (3)
| Title |
|---|
| 10kV配电网设备运行巡检维护;李窕;《中国高新区》;20170810(第15期);第114页 * |
| 就地化保护智能运维检修模式研究;杨剑友等;《浙江电力》;20181225;第37卷(第12期);第57-61页 * |
| 继电保护快速定检系统设计与实现;王光亮等;《电工技术》;20190325(第6期);第76-77页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111987701A (en) | 2020-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110336375B (en) | Processing method and system for power grid monitoring alarm information | |
| US20190361759A1 (en) | System and method to identify failed points of network impacts in real time | |
| CN104657913A (en) | Intelligent warning system based on all-data model | |
| CN111650921A (en) | Intelligent power grid regulation and control system equipment fault diagnosis method and system | |
| CN110178121B (en) | Database detection method and terminal thereof | |
| CN113282461A (en) | Alarm identification method and device for transmission network | |
| CN103871004A (en) | Power distribution network failure cause analyzing method based on expert system and D-S evidence theory | |
| JP2006252311A (en) | System and method for supporting facility maintenance plan | |
| CN103995215A (en) | Intelligent electrical-network fault diagnosis method based on multilevel feedback adjustment | |
| CN110166483B (en) | Power grid fault and network attack identification method, device and equipment | |
| CN105245001A (en) | Event-driven intelligent alarm processing method and device for transformer station accidents | |
| CN107069960A (en) | A kind of online defect diagnostic method of secondary operation management system | |
| CN116500385B (en) | Power transmission network monitoring and checking method, device, equipment and medium | |
| CN112182233B (en) | Knowledge base for storing equipment fault records, and method and system for assisting in positioning equipment faults by using knowledge base | |
| CN117289085A (en) | Multi-line fault analysis and diagnosis method and system | |
| CN109767108B (en) | Accurate analysis method for line state of power dispatching system | |
| CN113238890B (en) | Current sampling loop abnormity diagnosis method and device based on dynamic record data | |
| CN117810970A (en) | Power grid accident recovery method and system with main network self-starting function | |
| CN111987701B (en) | Power distribution network maintenance method | |
| CN117675522A (en) | Power communication fault diagnosis and prevention method and system | |
| CN105469186A (en) | Risk monitoring system capable of realizing self-monitoring and self-monitoring method | |
| CN115795359A (en) | Signal type distinguishing method and device and computer equipment | |
| CN116094174A (en) | Knowledge graph-based power grid operation and maintenance monitoring method, system, equipment and medium | |
| CN115409100A (en) | Method, device, medium and equipment for generating power accident emergency scheme | |
| CN114743703A (en) | Reliability analysis method, device, equipment and storage medium for nuclear power station unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |