CN113964944B - Control method and system for transformer substation - Google Patents

Control method and system for transformer substation Download PDF

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Publication number
CN113964944B
CN113964944B CN202111266198.4A CN202111266198A CN113964944B CN 113964944 B CN113964944 B CN 113964944B CN 202111266198 A CN202111266198 A CN 202111266198A CN 113964944 B CN113964944 B CN 113964944B
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China
Prior art keywords
maintenance
master station
station subsystem
switch
control terminal
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CN202111266198.4A
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CN113964944A (en
Inventor
吴帆
欧志卫
黄雨效
朱历生
欧阳龙
江辉鸿
吕桂强
周杨
孙玉彤
陈晓彬
朱颖
胡坤
陈连军
孟正华
王龙委
王若伟
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ZHUHAI ELECTRIC POWER DESIGN INSTITUTE CO LTD
Guangdong Power Grid Co Ltd
Heyuan Power Supply Bureau of Guangdong Power Grid Co Ltd
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ZHUHAI ELECTRIC POWER DESIGN INSTITUTE CO LTD
Guangdong Power Grid Co Ltd
Heyuan Power Supply Bureau of Guangdong Power Grid Co Ltd
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Priority to CN202111266198.4A priority Critical patent/CN113964944B/en
Publication of CN113964944A publication Critical patent/CN113964944A/en
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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
    • 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
    • H02J13/00001—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 characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • 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
    • H02J13/00002—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 characterised by monitoring
    • 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
    • H02J13/00034—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 an electric power substation
    • 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
    • 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
    • Y04S10/16—Electric power substations

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The embodiment of the invention discloses a control method and a system of a transformer substation, wherein the control method is executed by an interval control terminal in a control system of the transformer substation, and the control system comprises the following steps: the control device comprises an operation and maintenance host machine, operation and maintenance equipment and an interval control terminal; the scheduling master station subsystem is in communication connection with the operation and maintenance master station subsystem, the operation and maintenance master station subsystem and the operation and maintenance equipment are both in communication connection with the operation and maintenance host machine, and the scheduling master station subsystem is in communication connection with the interval control terminal; the control method comprises the following steps: receiving an operation instruction sent by a dispatching master station subsystem; acquiring switching information of each switch in the transformer substation according to the operation instruction; and determining an operation execution result according to the switch information, and transmitting the switch information and the operation execution result to the dispatching master station subsystem. The control method and the system for the transformer substation, provided by the embodiment of the invention, improve the reliability of transformer substation control.

Description

Control method and system for transformer substation
Technical Field
The embodiment of the invention relates to a power grid control technology, in particular to a control method and system of a transformer substation.
Background
Along with the continuous development of the power grid technology, the modern transformer substation gradually moves to informatization, networking and automation, and is continuously combined with computer technology, network technology, communication technology and AI auxiliary judgment technology, so that the intelligent level of the transformer substation is continuously improved, and the intelligent operation of the transformer substation and the intelligent inspection confirmation work are matched with intelligent comprehensive construction technical conditions. Meanwhile, the intelligent operation of the transformer substation is also required to ensure the accurate and reliable control and operation of the transformer substation.
At present, in the existing control method of the transformer substation, a plurality of inspection devices are usually arranged in the transformer substation, so that the working efficiency is affected, a control terminal in the transformer substation cannot directly perform terminal control, an upper-level judgment result is required to be accepted, the influence caused by tampering of external virus information can be possibly caused, and the information reliability is low; and the reliability of the substation control is affected because the on-site judgment and the on-site feedback cannot be realized.
Disclosure of Invention
The embodiment of the invention provides a control method and a control system for a transformer substation, which are used for improving the reliability of transformer substation control.
In a first aspect, an embodiment of the present invention provides a control method of a substation, where the control method is performed by an interval control terminal in a control system of the substation, and the control system includes: the control device comprises an operation and maintenance host machine, operation and maintenance equipment and an interval control terminal; the scheduling master station subsystem is in communication connection with the operation and maintenance master station subsystem, the operation and maintenance master station subsystem and the operation and maintenance equipment are both in communication connection with the operation and maintenance host machine, and the scheduling master station subsystem is in communication connection with the interval control terminal; the operation and maintenance equipment is used for sending a locking signal to the interval control terminal through the contact;
The control method comprises the following steps:
receiving an operation instruction sent by a dispatching master station subsystem, wherein the operation instruction comprises a confirmation switch state instruction;
acquiring switching information of each switch in the transformer substation according to the operation instruction;
determining an operation execution result according to the switch information, and transmitting the switch information and the operation execution result to a dispatching master station subsystem; the operation execution result comprises the switch states of all the switches in the transformer substation.
Optionally, the control system further comprises a remote host, and the remote host is in communication connection with the scheduling master station subsystem and the interval control terminal; and the dispatching master station subsystem is used for sending the operation instruction to the interval control terminal through the remote host.
Optionally, the switch information includes a contact signal and an operation angle;
determining an operation execution result according to the switch information, including:
determining the time difference of the contact signal and the angle range of the operation angle according to the contact signal and the operation angle of the switch;
if the time difference exceeds the preset setting time range and the operation angle exceeds the preset setting angle range, determining that the contact on-off of the switch is abnormal and the switching-on-off operation is abnormal.
Optionally, the scheduling master station subsystem is further configured to determine whether an operation execution result is correct according to the received switch information; if the operation execution result is determined to be incorrect, correcting the operation execution result.
Optionally, the scheduling master station subsystem is further configured to transmit an operation instruction to the operation and maintenance master station subsystem, where the operation and maintenance master station subsystem is configured to transmit the operation instruction to the operation and maintenance device through the operation and maintenance host machine, and the operation and maintenance device is configured to execute operation and maintenance work according to the operation instruction, generate a locking signal when confirming that the operation of the switch is abnormal, and send the locking signal to the interval control terminal through the contact; the operation and maintenance work comprises a patrol task of a switch in the transformer substation.
Optionally, after transmitting the switch information and the operation execution result to the scheduling master station subsystem, the method includes:
and receiving a locking signal transmitted by the operation and maintenance equipment and transmitting the locking signal to the dispatching master station subsystem.
In a second aspect, an embodiment of the present invention further provides a control system of a substation, including: the control device comprises an operation and maintenance host machine, operation and maintenance equipment and an interval control terminal; the scheduling master station subsystem is in communication connection with the operation and maintenance master station subsystem, the operation and maintenance master station subsystem and the operation and maintenance equipment are both in communication connection with the operation and maintenance host machine, and the scheduling master station subsystem is in communication connection with the interval control terminal; the operation and maintenance equipment sends a locking signal to the interval control terminal through the contact;
The interval control terminal is used for receiving an operation instruction sent by the dispatching master station subsystem, wherein the operation instruction comprises a switch state confirmation instruction; acquiring switching information of each switch in the transformer substation according to the operation instruction; determining an operation execution result according to the switch information, wherein the operation execution result comprises the switch states of all switches in the transformer substation; and transmitting the switch information and the operation execution result to the dispatching master station subsystem, and sending out corresponding prompt information.
Optionally, the scheduling master station subsystem is further configured to transmit an operation instruction to the operation and maintenance master station subsystem, where the operation and maintenance master station subsystem is configured to transmit the operation instruction to the operation and maintenance device through the operation and maintenance master station, and the operation and maintenance device is configured to execute operation and maintenance work according to the operation instruction, and generate a locking signal when confirming that the switch operation is abnormal; the operation and maintenance work comprises a patrol task of a switch in the transformer substation.
Optionally, the operation and maintenance device is further configured to transmit a blocking signal to the scheduling master subsystem through the operation and maintenance host and the operation and maintenance master subsystem.
Optionally, the interval control terminal is further configured to receive a blocking signal transmitted by the operation and maintenance device, and transmit the blocking signal to the scheduling master station subsystem.
The control method and the system of the transformer substation provided by the embodiment of the invention are executed by an interval control terminal in a control system of the transformer substation, and the control system comprises the following steps: the control device comprises an operation and maintenance host machine, operation and maintenance equipment and an interval control terminal; the scheduling master station subsystem is in communication connection with the operation and maintenance master station subsystem, the operation and maintenance master station subsystem and the operation and maintenance equipment are both in communication connection with the operation and maintenance host machine, and the scheduling master station subsystem is in communication connection with the interval control terminal; the operation and maintenance equipment is used for sending a locking signal to the interval control terminal through the contact; receiving an operation instruction sent by a dispatching master station subsystem, wherein the operation instruction comprises a confirmation switch state instruction; acquiring switching information of each switch in the transformer substation according to the operation instruction; determining an operation execution result according to the switch information, and transmitting the switch information and the operation execution result to a dispatching master station subsystem; the operation execution result comprises the switch states of all the switches in the transformer substation. According to the control method and the system for the transformer substation, the operation execution result can be determined through the interval control terminal of the control system, and can be judged and fed back in situ, the influence of virus information can be effectively avoided, locking operation can be performed even if information security holes appear, misoperation phenomenon is prevented, and accordingly reliability of transformer substation control is improved.
Drawings
Fig. 1 is a schematic structural diagram of a control system of a conventional transformer substation;
fig. 2 is a flowchart of a control method of a substation according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a control system of a substation according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of a control system of another substation according to the first embodiment of the present invention;
fig. 5 is a flowchart of a control method of a substation according to a second embodiment of the present invention;
FIG. 6 is a schematic diagram of a second embodiment of the present invention showing the operation from the closing position to the opening position of the isolating switch;
FIG. 7 is a schematic diagram of a disconnecting switch from a disconnected position to a connected position according to a second embodiment of the present invention;
fig. 8 is a schematic diagram of a grounding knife from split position to combined position according to a second embodiment of the present invention;
fig. 9 is a schematic diagram of a grounding knife from combining to splitting operation according to a second embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic structural diagram of a control system of a conventional transformer substation, referring to fig. 1, the conventional intelligent operation system of the transformer substation, that is, the control system, has a complex structure, and local information cannot be directly used due to signal safety, and can be fed back to an intelligent operation starting point only after uniform information safety processing. On one hand, only the intelligent operation starting point can receive comprehensive feedback information, and the intelligent operation starting point can comprehensively judge and confirm according to the final result of each safety partition, so that higher requirements are provided for the synchronization of multiple paths of feedback information; on the other hand, the multipath information occupies independent information routes, so that the resource waste is serious, the investment is high, the information is more in key nodes affected by the outside, the reliability is low, and meanwhile, the workload of operation maintenance and integral debugging and verification is increased. The intelligent operation and cooperation inspection confirmation system has unreasonable overall design, and can not meet the requirements of high reliability and man-reduction synergy of the intelligent operation and maintenance of the power system. Because the intelligent operation matched inspection confirmation system needs to execute inspection commands and collect inspection result information through the security III area and the security IV area of the transformer substation, the intelligent operation matched inspection confirmation system can be subjected to security attack even though the intelligent operation matched inspection confirmation system is subjected to security isolation and protection control, and the collected inspection result information is in error.
With the continuous development of the power grid, a great deal of practical work is carried out on the construction of the intelligent substation, a few positive effects are achieved, and a digital transformation foundation is laid. With the deep advancement of digital power grid construction, the construction of digital transformer substations has the following challenges: firstly, the digitization and intelligent upgrading of equipment in a transformer substation still has a large space, the research of related intelligent equipment is still in a starting stage, the intelligent equipment is in a scattered application stage and is not covered fully and has a wide application range, and particularly, the intelligent identification and intelligent confirmation of the position state of primary equipment of the transformer substation lack effective judgment means, so that the construction and development of intelligent operation and matched intelligent inspection confirmation are seriously influenced; secondly, the system lacks an overall advancing mechanism, cross-specialized coordination is difficult, integration is insufficient, primary and secondary equipment is not structurally fused enough, and data joint application among a safe area II, an area II and an area III is limited by cross-area interaction, so that the intelligent judging method breaks through the defect; thirdly, the intelligent confirmation data of the position state of primary equipment of the transformer substation is combined with the application level to be improved, most intelligent application of test points is stopped at the single monitoring and single sensing data judging level at present, the deep mining and deep application of the production full-element are not realized, and the degree of data fusion and data insight is not high. And fourthly, the intelligent confirmation data standard system, the data construction standard and the data application standard of the position state of the primary equipment of the transformer substation are lacked. The problems are all the problems to be solved for intelligent identification and confirmation of the position state of primary equipment of the transformer substation.
At present, the correctness judgment of the inspection and operation results of the circuit breaker, the disconnecting switch or the grounding knife at home and abroad mainly adopts a non-homologous double-confirmation mode, namely a confirmation mode 1: independently judging the auxiliary contact state of the safety I area; confirmation mode 2: the state of the primary equipment after operation (the application range of the video image analysis result is common) is determined by independently judging the inching joint state (a position proximity sensor) or independently judging the angle measurement result or independently judging the video image analysis (wherein the wireless transmission equipment is arranged in the safe IV) of the safe III area and then judging whether the two conditions are met by the auxiliary joint state judgment result and the video image analysis result or the inching joint state judgment result or the angle measurement judgment result. The independent judgment of the safety III area is a means for replacing manual on-site inspection, and is an anthropomorphic method, namely after each operation, the manual inspection is judged to be correct and has no abnormality, the next operation is carried out after reporting, and if the abnormality exists, the next operation is carried out after reporting and on-site processing. Because of the information interaction safety management requirements of the safety I area and the safety III area, the information cannot be directly and jointly analyzed and judged on site, and the intelligent recognition and judgment efficiency and accuracy of the position state of the primary equipment are seriously affected. At present, the position of the primary equipment is reflected through the auxiliary contact of the primary equipment, and whether the operation trend of the primary equipment meets the requirement of the operation direction can only be reflected, but whether the operation is completely in place or not and whether the contact degree of the primary equipment meets the requirement or not cannot be determined, so that other auxiliary judgment needs to be matched.
The substation with non-intelligent operation is checked and confirmed by operators on site manually, but other auxiliary judging means are needed to be matched under the intelligent operation environment, such as a video image analysis result or a micro-contact state judging result or an angle measurement judging result or a pressure sensor, so as to assist in judging the operation condition of primary equipment. The existing auxiliary contacts are all main shafts driven by a motor through a mechanical loop and are independently linked with the auxiliary contacts, so that the auxiliary contacts reflect the final positions of forward and reverse rotation of the motor, and the linkage loop can be independently disabled, so that the independent first criterion can be disabled, and the improvement is needed only by adopting the 'auxiliary contact position' as a confirmation mode 1. The video image analysis result serving as the second criterion is low in reliability, the intelligent learning time is long, the environmental conditions affecting the judgment result are more, and the situation that the video image cannot be identified frequently occurs; due to the structural limitations of primary devices, some devices are unable to provide images of valid locations available for video analysis; in order to simply pursue the independent non-homologous confirmation method 2, the conventional device does not strictly mount the inching contact state (position proximity sensor) at the last stage of the linkage operation mechanism, and the reactive position may fail as the auxiliary contact position in the accident. Therefore, the second criterion also fails in the same way, and the reliability of intelligent inspection and judgment is affected.
Example 1
Fig. 2 is a flowchart of a control method of a substation, which is provided in an embodiment of the present invention, and the embodiment is applicable to aspects of controlling the substation, where the method may be performed by an interval control terminal in a control system of the substation, and the control method specifically includes the following steps:
step 110, receiving an operation instruction sent by the dispatching master station subsystem, wherein the operation instruction comprises a confirmation switch state instruction.
Wherein the control system comprises: the control device comprises an operation and maintenance host machine, operation and maintenance equipment and an interval control terminal; the dispatching master station subsystem is in communication connection with the operation and maintenance master station subsystem, the operation and maintenance master station subsystem and the operation and maintenance equipment are both in communication connection with the operation and maintenance host, the dispatching master station subsystem is in communication connection with the interval control terminal, and the operation and maintenance equipment is used for sending a locking signal to the interval control terminal through a joint.
Fig. 3 is a schematic structural diagram of a control system of a substation according to a first embodiment of the present invention, and fig. 4 is a schematic structural diagram of a control system of another substation according to a first embodiment of the present invention. The control system shown in fig. 3 is a novel intelligent operation and supporting inspection confirmation system of a conventional transformer substation, and the control system shown in fig. 4 is a novel intelligent operation and supporting inspection confirmation system of an intelligent transformer substation. Referring to fig. 3 and 4, the control system further includes a remote host, a security isolation subsystem, the remote host being communicatively coupled to the dispatch master station subsystem and the interval control terminal, the security isolation subsystem being communicatively coupled to the operation and maintenance master station. The remote host, the operation and maintenance equipment and the interval control terminal are all arranged in the transformer substation. The operation and maintenance host comprises a III-area operation and maintenance host, wherein the operation and maintenance equipment comprises an I-area operation and maintenance equipment, a III-area operation and maintenance equipment and an IV-area operation and maintenance equipment, the IV-area operation and maintenance equipment is in communication connection with the safety isolation subsystem, and the I-area, the II-area, the III-area and the IV-area in the transformer substation can be areas obtained by dividing according to the safety level. The dispatching master station subsystem can send the operation instruction to the remote host, and the remote host can forward the operation instruction to the interval control terminal through the interval measurement and control device.
And 120, acquiring the switch information of each switch in the transformer substation according to the operation instruction.
The interval control terminal can acquire the switch information of the corresponding switch through a sensor connected with each switch in the transformer substation, and the acquired switch information can comprise the on time, the vanishing time, the operation angle and the like of the on signal of each contact.
Step 130, determining an operation execution result according to the switch information, and transmitting the switch information and the operation execution result to the dispatching master station subsystem; the operation execution result comprises the switch states of all the switches in the transformer substation.
Specifically, the interval control terminal can determine whether the switch state of the switch, such as the opening state or the closing state, is normal or has abnormal conditions according to the switch information. The interval control terminal can feed back the switch information and the operation execution result to the dispatching master station subsystem through the first operation and maintenance host, and the dispatching master station subsystem can confirm whether the operation execution result is correct according to the switch information, and if not, the operation execution result is corrected.
As shown in the control system of fig. 3, the remote host can collect multiple pieces of information such as "analog quantity", "auxiliary contact", "micro contact", "angle sensor" and "position proximity sensor" of all intervals required to be operated in the station, and can perform comprehensive judgment of the information; the interval measurement and control device can collect the analog quantity and the auxiliary contact of the interval, the I-zone operation and maintenance equipment can collect a plurality of pieces of information such as the auxiliary contact, the micro-motion contact, the angle sensor, the position proximity device, the high-risk alarm signal and the like of the interval, and the comprehensive judgment of the information beyond the analog quantity of the interval can be performed. The III region operation and maintenance host can collect all the interval III region intelligent judgment 'high-risk alarm' signals and abnormal signals in the station, the III region operation and maintenance equipment can collect information collected by the interval III region intelligent equipment in the station, carry out autonomous intelligent judgment on the collected information, send 'high-risk alarm' signals and abnormal signal judgment results to the upper system, and output 'high-risk alarm' signal locking joints to the I region operation and maintenance equipment. The IV region operation and maintenance equipment can collect information of the interval in the station, autonomously and intelligently judge the collected information, send a high-risk alarm signal and an abnormal signal judgment result to an upper system, and output a high-risk alarm signal locking contact to the I region operation and maintenance equipment.
As shown in the control system of fig. 4, the remote host can collect multiple pieces of information such as "analog quantity", "auxiliary contact", "micro contact", "angle sensor" and "position proximity sensor" of all intervals required to be operated in the station, and can perform comprehensive judgment of all pieces of information; the interval measurement and control device can collect multiple information such as analog quantity, auxiliary contact, micro contact, angle sensor, position proximity device, high-risk alarm signal and the like of the interval, and can comprehensively judge all information of the interval. The III-zone operation and maintenance host can acquire all the spaced III-zone intelligent judgment 'high-risk alarm' signals and abnormal signals in the station, and does not carry out comprehensive judgment; the III region operation and maintenance equipment can collect information of the interval in the station, can carry out independent intelligent judgment on the collected information, send a high-risk alarm signal and an abnormal signal judgment result to an upper system, and output a high-risk alarm signal locking contact to an interval measurement and control device. The IV region operation and maintenance equipment can collect information of the interval in the station, autonomously and intelligently judge the collected information, send a high-risk alarm signal and an abnormal signal judgment result to an upper system, and output a high-risk alarm signal locking contact to an interval measurement and control device. The system has the advantages of high judgment concentration, high speed, high information safety, low comprehensive investment and the like, does not need an operation and maintenance inspection host in a safety I area and a safety II area, and has the function completely replaced by a remote host, so that the system structure is simpler. When the control system is applied to an intelligent substation, I-zone operation and maintenance equipment of a safe I-zone is not needed, so that the system structure is simpler, the comprehensive investment is lower, and the operation and maintenance cost is lower.
With continued reference to fig. 4, the operation and maintenance devices in the safety III area and the safety IV area in the transformer substation feed back a high-risk alarm signal of the intelligent operation and maintenance device or the interval control terminal in the I area in the transformer substation, which is a null contact signal, and has high information security level; meanwhile, the on-site terminals of the operation and maintenance equipment in the safety III area and the safety IV area installed in the transformer substation can perform autonomous high-risk alarm signal judgment without superior judgment, so that the influence caused by the tampering of external virus information can be effectively avoided, and the information reliability is high; namely, on-site judgment and on-site feedback are independent of a system and communication, the criterion principle is on-site learning, on-site generation or program solidification, the influence of virus information can be effectively avoided, and even if an information security hole appears, locking operation can be performed, so that misoperation phenomenon is prevented.
The control method of the transformer substation provided in this embodiment is executed by an interval control terminal in a control system of the transformer substation, and the control system includes: the control device comprises an operation and maintenance host machine, operation and maintenance equipment and an interval control terminal; the dispatching master station subsystem is in communication connection with the operation and maintenance master station subsystem, the operation and maintenance master station subsystem and the operation and maintenance equipment are both in communication connection with the operation and maintenance host, the dispatching master station subsystem is in communication connection with the interval control terminal, and the operation and maintenance equipment is used for sending a locking signal to the interval control terminal through a joint; receiving an operation instruction sent by a dispatching master station subsystem, wherein the operation instruction comprises a confirmation switch state instruction; acquiring switching information of each switch in the transformer substation according to the operation instruction; determining an operation execution result according to the switch information, and transmitting the switch information and the operation execution result to a dispatching master station subsystem; the operation execution result comprises the switch states of all the switches in the transformer substation. According to the control method of the transformer substation, the operation execution result can be determined through the interval control terminal of the control system, and can be judged and fed back in situ, the influence of virus information can be effectively avoided, locking operation can be performed even if information security holes appear, misoperation is prevented, and accordingly reliability of transformer substation control is improved.
Example two
Fig. 5 is a flowchart of a control method of a substation provided by a second embodiment of the present invention, where the embodiment is applicable to aspects of controlling the substation, and the method may be performed by an interval control terminal in a control system of the substation, and the control method specifically includes the following steps:
step 210, receiving an operation instruction sent by the dispatching master station subsystem, where the operation instruction includes a confirmation switch state instruction.
Step 220, according to the operation instruction, obtaining the switch information of each switch in the transformer substation, wherein the switch information comprises a contact signal and an operation angle.
Step 230, determining the time difference of the contact signal and the angle range of the operation angle according to the contact signal and the operation angle of the switch.
An exemplary switch includes a disconnecting switch and a grounding knife, taking the disconnecting switch as an example, fig. 6 is a schematic diagram of a disconnecting switch from a closed position to a split position according to a second embodiment of the present invention, and fig. 7 is a schematic diagram of a disconnecting switch from a split position to a closed position according to a second embodiment of the present invention. Referring to fig. 6 and 7, the closing auxiliary contact and the closing micro contact of the isolating switch are respectively K1 and Q1, the dividing auxiliary contact and the dividing micro contact of the isolating switch are respectively K2 and Q2, the time difference Δt1 can be determined according to the vanishing time of the contact K1 and the vanishing time of the contact Q1, and the angle R1 is the angle of the isolating switch from closing to dividing operation. Similarly, the time difference Δt2 can be determined according to the vanishing time of the contact K2 and the vanishing time of the contact Q2, and the angle R2 is the angle of the disconnecting switch from the separated position to the combined position.
Fig. 8 is a schematic diagram of a grounding knife according to a second embodiment of the present invention from split to split, and fig. 9 is a schematic diagram of a grounding knife according to a second embodiment of the present invention from split to split. Referring to fig. 8 and 9, illustratively, the auxiliary tapping point and the tapping micro-tapping point of the grounding knife are K3 and Q3, respectively, the auxiliary tapping point and the micro-tapping point of the grounding knife are K4 and Q4, respectively, and the time difference Δt3 can be determined according to the vanishing time of the junction K3 and the vanishing time of the junction Q1, and the angle R3 is the angle of the grounding knife from tapping to tapping operation. Similarly, the time difference Δt4 can be determined according to the vanishing time of the contact K4 and the vanishing time of the contact Q4, and the angle R4 is an angle of the grounding switch from the closing position to the opening position.
And step 240, if the time difference exceeds the preset setting time range and the operation angle exceeds the preset setting angle range, determining that the contact on-off of the switch is abnormal and the opening and closing operation is abnormal.
Specifically, referring to fig. 6 and 7, if the time difference Δt1 exceeds the preset setting time range and the operation angle exceeds the preset setting angle range, the abnormal disconnection and the abnormal opening operation of the contact K1 and/or the contact Q1 of the isolating switch are determined. Similarly, if the time difference Δt2 exceeds the preset setting time range and the operation angle exceeds the preset setting angle range, the abnormal closing of the contact K1 and/or the contact Q1 of the isolating switch and the abnormal closing operation are determined. Referring to fig. 8 and 9, if the time difference Δt3 exceeds the preset setting time range and the operation angle exceeds the preset setting angle range, the contact K3 and/or the contact Q4 of the grounding knife are determined to be abnormal in disconnection and disconnection operation. Similarly, if the time difference Δt4 exceeds the preset setting time range and the operation angle exceeds the preset setting angle range, the abnormal closing of the contact K3 and/or the contact Q4 of the grounding knife and the abnormal closing operation are determined.
Step 250, transmitting the switch information and the operation execution result to the dispatching master station subsystem; the operation execution result comprises the switch states of all the switches in the transformer substation.
Specifically, the scheduling master station subsystem is further used for determining whether an operation execution result is correct according to the received switch information; if the operation execution result is determined to be incorrect, correcting the operation execution result. The scheduling main station subsystem is also used for transmitting the operation instruction to the operation and maintenance main station subsystem, the operation and maintenance main station subsystem is used for transmitting the operation instruction to operation and maintenance equipment through the operation and maintenance main station, and the operation and maintenance equipment is used for executing operation and maintenance work according to the operation instruction and generating a locking signal when abnormal switch operation is confirmed and when abnormal switch operation is confirmed; the operation and maintenance equipment is also used for transmitting the locking signal to the dispatching master station subsystem through the operation and maintenance master station subsystem. The scheduling master station subsystem determines the next operation according to the received locking signal; if a lockout signal is received before a certain switch operation, the operation will be lockout, preventing the operation from being allowed. The operation and maintenance work comprises a patrol task of a switch in the transformer substation and can also comprise an abnormality detection work before the switch is operated.
Step 260, receiving the locking signal transmitted by the operation and maintenance device, and transmitting the locking signal to the dispatching master station subsystem.
Specifically, the scheduling master station subsystem is further used for transmitting an operation instruction to the operation and maintenance master station subsystem, the operation and maintenance master station subsystem is used for transmitting the operation instruction to operation and maintenance equipment through the operation and maintenance host machine, and the operation and maintenance equipment is used for executing operation and maintenance work according to the operation instruction and generating a locking signal when abnormal operation of the switch is confirmed and when abnormal operation of the switch is confirmed; the operation and maintenance work comprises a patrol task of a switch in the transformer substation. The interval control terminal is also used for receiving a locking signal transmitted by the operation and maintenance equipment and transmitting the locking signal to the dispatching master station subsystem. And when the interval control terminal receives the locking signal, the control operation of opening and closing the switch can be locked, and when the scheduling master station subsystem receives the locking signal, the issuing of a corresponding operation instruction can be locked.
Referring to fig. 3, the scheduling master station subsystem includes a scheduling I region, i.e., a scheduling master station, a scheduling III region, wherein intelligent operation and maintenance related information exchange is realized between the scheduling I region and the scheduling III region through a forward isolation device and a reverse isolation device. The dispatching side receives the operation result return information of the transformer substation side, intelligent operation result judgment is not needed, dispatching pressure can be reduced, and the development directions of edge technology and edge judgment are met. The operation and maintenance main station subsystem comprises an operation and maintenance main station, namely an operation and maintenance main station, and the operation and maintenance main station is connected with a dispatching III area and a station end III area operation and maintenance main station through a firewall to realize intelligent operation and maintenance related information exchange. The operation and maintenance side ' operation and maintenance area III master station ' receives and forwards the intelligent operation command of the dispatching side, does not need to judge intelligent operation results, reduces the pressure of the operation and maintenance area III master station ', and meets the development directions of edge technology and edge judgment.
The remote host can receive an upper intelligent operation task or command, and reply an operation result of the intelligent operation task or command to an upper level, wherein the upper level comprises, but is not limited to, an intelligent operation task or command of a dispatching master station subsystem, an intelligent operation task or command of a dispatching command system, an intelligent operation task or command of a routing inspection center system and an intelligent operation task or command of an intelligent operation and maintenance master station system; according to the requirement of the upper-level command (including the decomposition of the upper-level intelligent operation task or command into a single-step operation task in a remote host and a single-step operation task in an interval measurement and control device), the upper-level intelligent operation task or command can be directly issued to the interval measurement and control device to receive the operation result of the intelligent operation task or command fed back by the interval measurement and control device.
The remote host receives the inspection result sent by the I-zone operation and maintenance equipment, contains a certain interval high-risk alarm signal, and sends the received information to the corresponding measurement and control device and the upper system. The inspection result sent by the 'I area operation and maintenance equipment' contains autonomous inspection results such as regular inspection and the like, and if the autonomous inspection result contains a 'high-risk alarm' signal, the intelligent inspection task is suspended. The remote host also sends a patrol command to the I-zone operation and maintenance equipment, wherein the patrol command comprises preparation intelligent operation interval information and a time range, and the comprehensive task or command of the upper intelligent operation is decomposed into single-step operation commands, then the single-step operation commands are issued to the interval measurement and control device, and the operation result of the single step fed back by the interval measurement and control device is received (each single-step operation task issuing has set delay, and in the delay time period, if a high-risk alarm is received, the single-step operation task command is temporarily stopped until the continuous operation task is received or the operation task is finished is received).
The remote host can also comprehensively judge whether the operation result is correct or not according to the single step operation result fed back by the interval measurement and control device and the related analog quantity and system running mode information acquired by the device (the step comprehensive judgment operation result is correct and the next single step operation task is met if the high-risk alarm is not received), if yes, the next single step operation task is sent to the interval measurement and control device, and if not, the next single step operation task is suspended to the interval measurement and control device until the continuous operation task is received or the ending operation task command is received, and the received continuous operation task or the ending operation task command comprises a manual input command; and after all the single-step operation tasks are finished, feeding back the operation result of the comprehensive tasks to the upper stage. The remote host can also comprehensively judge whether the result of the comprehensive task is correct by combining the received comprehensive task operation result fed back by the interval measurement and control device with the related analog quantity and system operation mode information acquired by the device, and then feeds back the comprehensive task operation result to the upper level.
The interval measurement and control device can receive an intelligent operation task or command issued by the remote host and reply an operation result of the intelligent operation task or command to the remote host; according to the command requirement of the upper tele-host (including decomposing into single-step operation tasks in an interval measurement and control device and directly executing the single-step operation tasks) in the intelligent operation tasks or commands of the tele-host, decomposing the intelligent operation comprehensive tasks or commands of the tele-host into single-step operation commands, then executing the operation tasks step by step, and combining the related analog quantity and system running mode information acquired by the device, comprehensively judging whether the operation result is correct step by step, and judging whether the next single-step operation task can be executed (judging whether the operation result is correct step by step and the next single-step operation task is satisfied if the high-risk alarm is not received), if the operation result is correct step by step, executing the next single-step operation task, and if the operation result is not satisfied, suspending the next single-step operation task until the continuous operation task is received or the ending operation task command is received, wherein the received continuous operation task or the ending operation task command comprises a manual input command; and after all the single-step operation tasks are finished, feeding back the comprehensive task operation result to the remote host. The interval measurement and control device can also execute single-step operation commands of intelligent operation of the remote host according to the command requirement of the upper-level remote host, comprehensively judge whether the single-step operation task result is correct or not by combining the related analog quantity and system operation mode information acquired by the device, and then feed back the operation result to the remote host (the operation result has 3 types of reasons including correct, incorrect and incorrect).
The I-zone operation and maintenance equipment can receive an intelligent operation inspection task issued by the remote host, and reply intelligent operation inspection result information and a received high-risk alarm signal to the remote host, wherein the high-risk alarm signal comprises interval information; according to the step-by-step operation inspection command of the upper-level telecontrol host, and by combining the related analog quantity, switching value and system running mode information acquired by the device (the information acquired by the device contains the physical position information of auxiliary contact, mechanical rotation angle, micro-contact, position proximity device and the like), comprehensively judging whether the step-by-step operation result is correct, and then feeding back the operation result to the telecontrol host (the operation result has 3 kinds of reasons including correct, incorrect and incorrect). The III region operation and maintenance host can receive intelligent operation cooperation inspection tasks issued by the upper level, wherein the tasks comprise execution time periods, corresponding operation contents, expected time, operation intervals and the like; according to the task, the III-zone operation and maintenance equipment to be started is calculated, and then split-phase inspection task orders (inspection content, expected time and the like) are respectively sent to the III-zone operation and maintenance equipment.
If the 'high-risk alarm' signal is not received, the third-area operation and maintenance host machine feeds back the end of the intelligent operation cooperation patrol to the upper system and no abnormality is found after receiving the patrol result of all the intelligent operation cooperation; if the high-risk alarm signal is received, the intelligent operation abnormal position signal and the high-risk alarm signal are directly fed back to the upper system. The III region operation and maintenance equipment can receive intelligent operation issued by the III region operation and maintenance host machine to cooperate with the patrol task, complete the patrol work and report the patrol judgment result in the task required time period, and send the patrol result to the III region operation and maintenance host machine; if the patrol finds the high-risk alarm signal, the high-risk alarm contact signal is directly output to the I-zone operation and maintenance equipment. The IV area operation and maintenance equipment receives intelligent operation cooperation inspection tasks issued by an upper level, wherein the tasks comprise execution time periods, corresponding operation contents, expected time, operation intervals and the like; executing intelligent operation to cooperate with the patrol task, and uploading the patrol result to the operation and maintenance master station; if the patrol finds the high-risk alarm signal, the high-risk alarm contact signal is directly output to the I-zone operation and maintenance equipment. The IV area operation and maintenance equipment can establish communication connection with the superior operation and maintenance master station through the safety isolation subsystem.
Referring to fig. 4, in the intelligent substation system, the function of the interval measurement and control device includes all functions of the operation and maintenance equipment in the area I in the conventional substation system, so that the system structure is simpler and more reliable, and has more use and popularization values; however, the main advantage of the conventional transformer substation system is that the intelligent operation and maintenance modification project of the old station is used, so that the hardware value of an interval measurement and control device in the existing transformer substation can not be wasted. The remote host can receive an upper intelligent operation task or command and reply an operation result of the intelligent operation task or command to an upper level, wherein the upper level comprises, but is not limited to, an intelligent operation task or command of a dispatching master station system, an intelligent operation task or command of a dispatching command system, an intelligent operation task or command of a routing inspection center system and an intelligent operation task or command of an intelligent operation and maintenance master station system; the method can also directly send the upper intelligent operation task or command to the interval measurement and control device according to the upper command requirement (including the decomposition of the upper intelligent operation task or command into a single-step operation task in the remote host or into a single-step operation task in the interval measurement and control device) and receive the operation result of the intelligent operation task or command fed back by the interval measurement and control device. The remote host can receive the inspection result sent by the interval measurement and control device and comprises an interval high-risk alarm signal. The inspection result sent by the interval measurement and control device contains autonomous inspection results such as regular inspection, and if the autonomous inspection result contains a high-risk alarm signal, the intelligent inspection task is suspended.
The remote host can decompose the comprehensive task or command of the upper intelligent operation into a single-step operation command, then send the single-step operation command to the interval measurement and control device and receive the single-step operation result fed back by the interval measurement and control device. (Each single step task is issued with a set delay, and the single step task is temporarily stopped if a 'high risk alarm' is received in the delay period until a continuous operation task is received or an ending operation task is received). The remote host can also comprehensively judge whether the operation result is correct or not according to the single step operation result fed back by the interval measurement and control device and the related analog quantity and system running mode information acquired by the device (whether the operation result is correct by step comprehensive judgment and the next single step operation task is met if the high-risk alarm is not received), if yes, the next single step operation task is sent to the interval measurement and control device, and if not, the next single step operation task is suspended to the interval measurement and control device until the continuous operation task is received or the ending operation task command is received, and the received continuous operation task or the ending operation task command comprises a manual input command; and after all the single-step operation tasks are finished, feeding back the operation result of the comprehensive tasks to the upper stage. The remote host can also comprehensively judge whether the result of the comprehensive task is correct by combining the received comprehensive task operation result fed back by the interval measurement and control device with the related analog quantity and system operation mode information acquired by the device, and then feeds back the comprehensive task operation result to the upper level.
The interval measurement and control device can receive an intelligent operation task or command issued by the remote host and reply an operation result of the intelligent operation task or command to the remote host; according to the command requirement of the upper-level telemechanical host (including decomposing into single-step operation tasks in an interval measurement and control device and directly executing the single-step operation tasks) the comprehensive tasks or commands of the telemechanical host intelligent operation are decomposed into single-step operation commands, then the operation tasks are executed step by step, and the relevant analog quantity and system running mode information acquired by the device are combined, so that whether the operation result is correct or not is judged step by step, the next-step single-step operation task can be executed (the step comprehensive judgment operation result is correct and the next-step single-step operation task is satisfied if the high-risk alarm is not received), if the next-step single-step operation task is satisfied, the next-step single-step operation task is paused if the next-step single-step operation task is not satisfied, until the continuous operation task is received or the ending operation task command is received, and the received continuous operation task command or the ending operation task command is received comprises the manual input command; and after all the single-step operation tasks are finished, feeding back the comprehensive task operation result to the remote host.
The interval measurement and control device can also execute single-step operation commands of intelligent operation of the remote host according to the command requirement of the upper-level remote host, comprehensively judge whether the single-step operation task result is correct or not by combining the related analog quantity and system operation mode information acquired by the device, and then feed back the operation result to the remote host (the operation result has 3 types of reasons including correct, incorrect and incorrect). The interval measurement and control device can also reply intelligent operation inspection result information and a received high-risk alarm signal to the remote host, wherein the high-risk alarm signal comprises interval information.
The III region operation and maintenance host can receive intelligent operation cooperation inspection tasks issued by the upper operation and maintenance master station, wherein the tasks comprise execution time periods, corresponding operation contents, expected time, operation intervals and the like; according to the task, the III-zone operation and maintenance equipment to be started is calculated, and then split-phase patrol task orders (patrol content, predicted time and the like) are respectively sent to the III-zone operation and maintenance equipment to be started. The third-area operation and maintenance host receives the inspection result of the third-area operation and maintenance equipment, and if the high-risk warning signal is not received, the third-area operation and maintenance host feeds back the inspection completion of the intelligent operation and the inspection to the upper system after receiving the inspection result of all the intelligent operation and maintenance, and no abnormality is found; if the high-risk alarm signal is received, the intelligent operation abnormal position signal and the high-risk alarm signal are directly fed back to the upper system. The third-area operation and maintenance equipment receives intelligent operation matched with a patrol task issued by the third-area operation and maintenance host, completes patrol work in a task required time period, reports patrol judgment results, and sends the patrol results to the third-area operation and maintenance host; if the patrol finds the high-risk alarm signal, the high-risk alarm contact signal is directly output to the interval measurement and control device. The IV area operation and maintenance equipment receives intelligent operation cooperation inspection tasks issued by an upper operation and maintenance master station, wherein the tasks comprise execution time periods, corresponding operation contents, expected time, operation intervals and the like; executing intelligent operation to cooperate with the patrol task, and uploading the patrol result to the operation and maintenance master station; if the patrol finds the high-risk alarm signal, the high-risk alarm contact signal is directly output to the interval measurement and control device. And the IV-zone operation and maintenance equipment establishes communication connection with the superior operation and maintenance master station through the safety isolation subsystem.
The system has simple loop design, adopts a direct judgment mode of operation and result with a safety zone, avoids the influence of misoperation caused by misjudgment results of the safety zone III and the safety zone IV, and has very wide popularization and application values because the judgment results of the safety zone III and the safety zone IV are only locked and output and have no permission command, thereby effectively avoiding the defects of various existing designs, realizing the direct judgment of successful operation. The method can not only accurately judge the position which is not operated (the stroke is too small), but also judge the operation which is correct, and can also judge the position which is operated (the stroke is too large) and simultaneously protect the power supply operation of the tripping motor; the integrity of the related loop can be monitored in advance before the next operation, namely, the contact signal of high-risk alarm can be received in advance, and the site abnormality can be proposed in advance; the operation result judgment can be carried out by matching with manual operation and remote control operation; the electric circuit can prevent non-allowable misoperation, and can effectively prevent misoperation caused by electric circuit faults; the multi-judgment is combined with the cooperative judgment, so that the working efficiency is obviously improved.
In addition, the system can greatly reduce the arrangement quantity of the camera equipment, each judgment position is not required to be arranged in a safety III area one by one, the total equipment quantity of the total station is obviously reduced, the network is simplified obviously, the comprehensive cost is lower, and the front-end equipment directly has the judgment function and accords with the development direction. When the intelligent inspection equipment in the safety III area and the intelligent inspection equipment in the safety IV area judge abnormality, the judging signals contain high-risk signals, other correct judging signals are realized by the equipment in the safety I area and the equipment in the safety II area (such as various meters, liquid positions, pointer positions and the like), the intelligent inspection equipment is completely different from the prior system thought, and the prior system intelligent inspection equipment in the safety III area and the intelligent inspection equipment in the safety IV area is completely abandoned to judge normal thought. The on-site terminal of the intelligent operation and maintenance system of the safety III area and the safety IV area installed in the transformer substation only carries out autonomous high-risk alarm signal judgment and does not accept the superior judgment result, so that the influence caused by the tampering of external virus information can be effectively avoided, and the information reliability is high; namely, in-situ judgment and in-situ feedback, is independent of a system and communication, and the criterion principle is in-situ learning, in-situ generation or program solidification, so that the influence of virus information is effectively avoided.
The control method of the transformer substation is executed by an interval control terminal in a control system of the transformer substation, and the operation instruction comprises a switch state confirmation instruction by receiving the operation instruction sent by the dispatching master station subsystem; acquiring switching information of each switch in the transformer substation according to the operation instruction; determining an operation execution result according to the switch information, and transmitting the switch information and the operation execution result to a dispatching master station subsystem; the operation execution result comprises the switch states of all the switches in the transformer substation. According to the control method of the transformer substation, the operation execution result can be determined through the interval control terminal of the control system, and can be judged and fed back in situ, the influence of virus information can be effectively avoided, locking operation can be performed even if information security holes appear, misoperation is prevented, and accordingly reliability of transformer substation control is improved.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (6)

1. A control method of a substation, characterized in that the control method is performed by an interval control terminal in a control system of the substation, the control system comprising: the control device comprises an operation and maintenance host machine, operation and maintenance equipment and the interval control terminal; the dispatching master station subsystem is in communication connection with the operation and maintenance master station subsystem, the operation and maintenance master station subsystem and the operation and maintenance equipment are both in communication connection with the operation and maintenance master station, and the dispatching master station subsystem is in communication connection with the interval control terminal; the operation and maintenance equipment is used for sending a locking signal to the interval control terminal through a contact;
the control method comprises the following steps:
receiving an operation instruction sent by the dispatching master station subsystem, wherein the operation instruction comprises a confirmation switch state instruction;
acquiring switch information of each switch in the transformer substation according to the operation instruction;
determining an operation execution result according to the switch information, and transmitting the switch information and the operation execution result to the dispatching master station subsystem; the operation execution result comprises the switch states of all switches in the transformer substation;
The control system also comprises a remote host, and the remote host is in communication connection with the scheduling master station subsystem and the interval control terminal; the dispatching master station subsystem is used for sending the operation instruction to the interval control terminal through the remote host;
the switch information comprises a contact signal and an operation angle;
the determining the operation execution result according to the switch information comprises the following steps:
determining the time difference of the contact signals and the angle range of the operation angle according to the contact signals and the operation angle of the switch;
if the time difference exceeds a preset setting time range and the operation angle exceeds a preset setting angle range, determining that the contact on-off of the switch is abnormal and the switching-on/off operation is abnormal;
the scheduling main station subsystem is also used for transmitting the operation instruction to the operation and maintenance main station subsystem, the operation and maintenance main station subsystem is used for transmitting the operation instruction to the operation and maintenance equipment through the operation and maintenance host, the operation and maintenance equipment is used for executing operation and maintenance work according to the operation instruction, generating the locking signal when confirming that the operation of a switch is abnormal, and transmitting the locking signal to the interval control terminal through a contact; the operation and maintenance work comprises a patrol task of a switch in the transformer substation.
2. The method for controlling a transformer substation according to claim 1, wherein the scheduling master station subsystem is further configured to determine whether the operation execution result is correct according to the received switching information; and if the operation execution result is determined to be incorrect, correcting the operation execution result.
3. The method for controlling a substation according to claim 1, wherein after the transmission of the switching information and the operation execution result to the scheduling master station subsystem, the method comprises:
and receiving the locking signal transmitted by the operation and maintenance equipment and transmitting the locking signal to the dispatching master station subsystem.
4. A control system for a substation, comprising: the system comprises a dispatching master station subsystem, an operation and maintenance master station subsystem and a control device in a transformer substation, wherein the control device comprises an operation and maintenance host machine, operation and maintenance equipment and an interval control terminal; the dispatching master station subsystem is in communication connection with the operation and maintenance master station subsystem, the operation and maintenance master station subsystem and the operation and maintenance equipment are both in communication connection with the operation and maintenance master station, and the dispatching master station subsystem is in communication connection with the interval control terminal; the operation and maintenance equipment sends a locking signal to the interval control terminal through a contact;
The interval control terminal is used for receiving an operation instruction sent by the dispatching master station subsystem, and the operation instruction comprises a confirmation switch state instruction; acquiring switch information of each switch in the transformer substation according to the operation instruction; determining an operation execution result according to the switch information, wherein the operation execution result comprises the switch states of all switches in the transformer substation; transmitting the switch information and the operation execution result to the dispatching master station subsystem, and sending out corresponding prompt information;
the control system also comprises a remote host, and the remote host is in communication connection with the scheduling master station subsystem and the interval control terminal; the dispatching master station subsystem is used for sending the operation instruction to the interval control terminal through the remote host;
the switch information comprises a contact signal and an operation angle;
the interval control terminal is specifically used for determining the time difference of the contact signals and the angle range of the operation angle according to the contact signals and the operation angle of the switch; if the time difference exceeds a preset setting time range and the operation angle exceeds a preset setting angle range, determining that the contact on-off of the switch is abnormal and the switching-on/off operation is abnormal;
The scheduling main station subsystem is also used for transmitting the operation instruction to the operation and maintenance main station subsystem, the operation and maintenance main station subsystem is used for transmitting the operation instruction to the operation and maintenance equipment through the operation and maintenance host, the operation and maintenance equipment is used for executing operation and maintenance work according to the operation instruction, generating the locking signal when confirming that the operation of a switch is abnormal, and transmitting the locking signal to the interval control terminal through a contact; the operation and maintenance work comprises a patrol task of a switch in the transformer substation.
5. The control system of a substation of claim 4, wherein the operation and maintenance device is further configured to transmit the blocking signal to the dispatch master subsystem via the operation and maintenance master subsystem and the operation and maintenance master subsystem.
6. The substation control system of claim 4, wherein the interval control terminal is further configured to receive the blocking signal transmitted by the operation and maintenance device, and transmit the blocking signal to the scheduling master station subsystem.
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