CN110611371B - System and method for testing time setting and timekeeping of distribution automation equipment - Google Patents
System and method for testing time setting and timekeeping of distribution automation equipment Download PDFInfo
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- CN110611371B CN110611371B CN201810622990.0A CN201810622990A CN110611371B CN 110611371 B CN110611371 B CN 110611371B CN 201810622990 A CN201810622990 A CN 201810622990A CN 110611371 B CN110611371 B CN 110611371B
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0644—External master-clock
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- 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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Abstract
The invention relates to a time setting and time keeping test system and a method for distribution automation equipment, wherein the system comprises: the system comprises a standard clock module, a network interaction module, a simulation test master station, a time scale event trigger module and distribution automation equipment; the network interaction module is respectively connected with the simulation test master station, the time scale event trigger module and the distribution automation equipment in a bidirectional way; the network interaction module is connected with the standard clock module in a one-way mode; the simulation test master station is bidirectionally connected with the distribution automation equipment; the technical scheme of the invention meets the time synchronization function and time keeping performance test requirements of a plurality of distribution automation devices, realizes the time synchronization of a master station of a distribution automation terminal or a distribution line fault indicator and the SNTP, and realizes the interference time synchronization and time keeping performance test; the selection of the reference time in the test process is more scientific and accurate, the external environment interference in the communication process between the distribution automation equipment and the distribution main station based on a wireless communication mode can be effectively eliminated, and the correctness of the test result is improved.
Description
Technical Field
The invention belongs to the technical field of detection of time setting function and time keeping performance of distribution automation equipment, and particularly relates to a time setting and time keeping test system and method for distribution automation equipment.
Background
The popularization and application of the distribution automation technology are beneficial to comprehensively improving the active sensing and decision control capability of the running state of the power distribution network, and the intelligent operation and maintenance management and control of the power distribution network are effectively supported. Distribution automation equipment is responsible for carrying out real-time supervision and control to primary equipment in the distribution network as distribution automation system important component, realizes distribution lines's fault detection and location, provides powerful support for distribution network accident analysis, fault isolation and recovery. The time consistency in the distribution automation system is a precondition for ensuring the realization of the functions, the time synchronization function and the time keeping performance are important indexes of the time synchronization of the distribution automation system, the current distribution automation device can receive the time synchronization command of a distribution master station or other time synchronization devices, keep the synchronization with the system time, simultaneously recognize the ineffective time interference and make reasonable feedback, and after the time synchronization of the device is successful, the device can still maintain the self time accuracy even if the time service signal is lost.
In order to ensure that the distribution automation equipment meets the standard specification requirements before being put into operation of a power grid, the time synchronization function and the time keeping performance of the distribution automation equipment need to be detected, but the existing detection has the following problems:
(1) the current time of the distribution automation equipment is inconvenient to obtain intuitively, and the simulation test master station is required to receive message information with time scales uploaded by the distribution automation equipment to obtain the current time of the distribution automation equipment;
(2) the existing detection method is implemented under the condition of neglecting the communication delay of the distribution automation equipment and the simulation test master station, and for the distribution automation terminal equipment which is accessed to the distribution master station in a wired mode, the influence of the communication time on the test result is limited due to less external interference; however, for devices such as a distribution line fault indicator wirelessly connected to a distribution main station, the communication time is susceptible to the external environment, and the standard time setting/keeping time is very short, which may affect the test result.
Disclosure of Invention
The invention provides a time synchronization and punctuality test system and a time synchronization and punctuality test method for distribution automation equipment, aiming at eliminating the influence on a test result caused by communication delay in a test process and improving the correctness of a detection result.
The purpose of the invention is realized by adopting the following technical scheme:
in a distribution automation device time to time and time to watch test system, the improvement comprising:
the system comprises a standard clock module, a network interaction module, a simulation test master station, a time scale event trigger module and distribution automation equipment;
the network interaction module is respectively connected with the simulation test master station, the time scale event trigger module and the distribution automation equipment in a bidirectional mode;
the network interaction module is connected with the standard clock module in a one-way mode;
the simulation test master station is bidirectionally connected with the power distribution automation equipment;
the standard clock module is used for sending a GPS/Beidou system time service signal to the network interaction module and realizing SNTP time service of the distribution automation equipment;
the network interaction module is used for receiving the time service signal of the GPS/Beidou system to carry out self time calibration and is used as the standard clock time of the whole test system; building a local area network and providing a communication interface for access equipment;
the time scale event triggering module is used for sending a triggering event signal with a time scale to the distribution automation equipment according to a control command issued by the simulation test master station, and uploading triggering event information to the simulation test master station through the network interaction module;
the simulation test master station is used for issuing a control command to the time scale event trigger module; receiving trigger event information uploaded by the time scale event trigger module, taking action starting time in the trigger event information as reference time, receiving message information with time scales uploaded by the tested distribution automation equipment, extracting current time of the distribution automation equipment, determining a current time error of the tested distribution automation equipment according to the reference time and the current time, and evaluating time-setting and time-keeping performance of the distribution automation equipment according to the current time error.
Preferably, the trigger event signal with time scale is an analog switch on-off action signal, and the trigger event information is analog switch on-off action information.
Preferably, the time scale event triggering module comprises a signal source and a wave recording module which are connected in sequence;
the signal source is used for simulating a distribution line current mutation or phase electric field intensity mutation operation scene according to a control command issued by the simulation test master station, sending a current mutation or phase electric field intensity mutation signal to the distribution automation equipment, and triggering the distribution line fault indicator to start a wave recording function;
and the wave recording module is used for monitoring and recording signals output by the signal source, generating a waveform file marking wave recording starting time parameters and uploading the waveform file to the simulation test master station through the network interaction module.
Preferably, the determining a current time error of the measured distribution automation device according to the reference time and the current time, and evaluating the time synchronization and the time keeping performance of the distribution automation device according to the current time error includes:
(1) determining a time setting error delta T1 of the tested distribution automation equipment to be T0-T1 according to a difference value between the reference time T0 and the current time T1, judging whether the time setting error delta T1 is smaller than a first threshold value, and if yes, carrying out the next test; otherwise, the time setting function of the tested distribution automation equipment does not meet the time setting requirement, and the test is finished;
(2) issuing a control command with invalid time to the tested distribution automation equipment, determining a time setting error delta T2 of the tested distribution automation equipment to be T2-T3 according to a difference value between reference time T0 and current time T1, judging whether the time setting error delta T2 is smaller than a first threshold value, and if so, carrying out the next test; otherwise, the time setting function of the tested distribution automation equipment does not meet the time setting requirement, and the test is finished;
(3) taking the action starting time in the trigger event information as reference time T4, taking the time of uploading the time scale event information by the distribution automation equipment as equipment current time T5, and determining the time setting error delta T3 of the measured distribution automation equipment to be T4-T5 according to the difference value between the reference time T4 and the current time T5;
(4) disconnecting a communication link with the distribution automation equipment, and keeping the time-keeping time T required by the standby operation standard of the equipment;
reestablishing a network connection relation between the distribution automation equipment and the distribution automation equipment, and determining a time setting error delta T4 of the distribution automation equipment to be tested to be T6-T7 according to a difference value between the reference time T6 and the current time T7;
determining the time keeping error time delta t as delta t 4-delta t3 according to the difference value between the time setting error delta t4 and the time setting error delta t3, and judging whether the time keeping error time delta t is smaller than a second threshold value or not; if so, the tested distribution automation equipment meets the requirements; otherwise, the tested distribution automation equipment does not meet the timekeeping requirement.
Preferably, the simulation test main station is connected to the distribution automation equipment in a bidirectional manner, and includes:
the simulation test main station is bidirectionally connected with the distribution automation equipment through an RJ Ethernet interface or an RS232 serial port.
Preferably, the standard clock module and the network interaction module follow the SNTP protocol; the simulation test main station and the network interaction module follow a TCP (transmission control protocol), an IP (Internet protocol) and an IEC60870-5-104 protocol; the distribution automation equipment and the network interaction module conform to a TCP protocol, an IP protocol, an SNTP protocol and an IEC60870-5-104 protocol.
In a method for testing power distribution automation equipment with respect to time and space, the improvement comprising:
the standard clock module sends a GPS/Beidou system time service signal to the network interaction module, and SNTP time service of the distribution automation equipment is realized;
the network interaction module receives a time service signal of the GPS/Beidou system to carry out self time calibration and is used as the standard clock time of the whole test system;
the simulation test master station issues a control command to the time scale event trigger module;
the time scale event triggering module sends a triggering event signal with a time scale to the distribution automation equipment according to a control command issued by the simulation test master station, and uploads triggering event information to the simulation test master station through the network interaction module;
the simulation test master station receives the trigger event information uploaded by the time scale event trigger module, takes the action start time in the trigger event information as reference time, receives the message information with the time scale uploaded by the tested distribution automation equipment, extracts the current time of the distribution automation equipment, determines the current time error of the tested distribution automation equipment according to the reference time and the current time, and evaluates the time synchronization and time keeping performance of the distribution automation equipment according to the current time error.
Preferably, the trigger event signal with time scale is an analog switch on-off action signal, and the trigger event information is analog switch on-off action information.
Preferably, the time scale event triggering module comprises a signal source and a wave recording module which are connected in sequence;
the signal source simulates an operation scene of current mutation or phase electric field intensity mutation of the distribution line according to a control command issued by the simulation test master station, sends a current mutation or phase electric field intensity mutation signal to the distribution automation equipment, and triggers a fault indicator of the distribution line to start a wave recording function;
and the wave recording module monitors and records signals output by the signal source, generates a waveform file marking wave recording starting time parameters and uploads the waveform file to the simulation test master station through the network interaction module.
Preferably, the determining a current time error of the measured distribution automation device according to the reference time and the current time, and evaluating the time synchronization and the time keeping performance of the distribution automation device according to the current time error includes:
(1) determining a time setting error delta T1 of the tested distribution automation equipment to be T0-T1 according to a difference value between the reference time T0 and the current time T1, judging whether the time setting error delta T1 is smaller than a first threshold value, and if yes, carrying out the next test; otherwise, the time setting function of the tested distribution automation equipment does not meet the time setting requirement, and the test is finished;
(2) the method comprises the steps that a simulation test master station issues a control command with invalid time to a tested distribution automation device, the time setting error delta T2 of the tested distribution automation device is determined to be T2-T3 according to the difference value between reference time T0 and current time T1, whether the time setting error delta T2 is smaller than a first threshold value or not is judged, and if yes, the next test is carried out; otherwise, the time setting function of the tested distribution automation equipment does not meet the time setting requirement, and the test is finished;
(3) taking the action starting time in the trigger event information as reference time T4, taking the time of uploading the time scale event information by the distribution automation equipment as equipment current time T5, and determining the time setting error delta T3 of the measured distribution automation equipment to be T4-T5 according to the difference value between the reference time T4 and the current time T5;
(4) disconnecting a communication link between the simulation test master station and the distribution automation equipment, and keeping the timekeeping time T required by the standby operation standard of the equipment;
reestablishing a network connection relation between the distribution automation equipment and the simulation test master station, and determining a time setting error delta T4 of the distribution automation equipment to be tested to be T6-T7 according to a difference value between the reference time T6 and the current time T7;
determining a timekeeping error delta t, namely delta t 4-delta t3 according to the difference value between the time setting error delta t4 and the time setting error delta t3, and judging whether the timekeeping error delta t is smaller than a second threshold value or not; if so, the tested distribution automation equipment meets the requirements; otherwise, the tested distribution automation equipment does not meet the timekeeping requirement.
Preferably, the simulation test main station is bidirectionally connected with the distribution automation equipment through an RJ Ethernet interface or an RS232 serial port.
Preferably, the standard clock module and the network interaction module follow the SNTP protocol; the simulation test main station and the network interaction module follow a TCP (transmission control protocol), an IP (Internet protocol) and an IEC60870-5-104 protocol; the distribution automation equipment and the network interaction module conform to a TCP protocol, an IP protocol, an SNTP protocol and an IEC60870-5-104 protocol.
Compared with the closest prior art, the technical scheme provided by the invention has the following beneficial effects:
the invention provides a time synchronization and punctuality test system and a method for distribution automation equipment, wherein the system comprises: the system comprises a standard clock module, a network interaction module, a simulation test master station, a time scale event trigger module and distribution automation equipment; the network interaction module is respectively connected with the simulation test master station, the time scale event trigger module and the distribution automation equipment in a bidirectional mode; the network interaction module is connected with the standard clock module in a one-way mode; the simulation test master station is bidirectionally connected with the power distribution automation equipment; the standard clock module is used for sending a GPS/Beidou system time service signal to the network interaction module and realizing SNTP time service of the distribution automation equipment; the network interaction module is used for receiving the time service signal of the GPS/Beidou system to carry out self time calibration and is used as the standard clock time of the whole test system; building a local area network and providing a communication interface for access equipment; the time scale event triggering module is used for sending a triggering event signal with a time scale to the distribution automation equipment according to a control command issued by the simulation test master station, and uploading triggering event information to the simulation test master station through the network interaction module; the simulation test master station is used for issuing a control command to the time scale event trigger module; receiving trigger event information uploaded by the time scale event trigger module, taking action starting time in the trigger event information as reference time, receiving message information with time scales uploaded by the tested distribution automation equipment, extracting current time of the distribution automation equipment, determining a current time error of the tested distribution automation equipment according to the reference time and the current time, and evaluating time-setting and time-keeping performance of the distribution automation equipment according to the current time error.
The time synchronization and time keeping test system and method for the distribution automation equipment meet the time synchronization function and time keeping performance test requirements of a plurality of distribution automation equipment, realize a plurality of modes of time synchronization of a master station of a distribution automation terminal or a distribution line fault indicator and SNTP time synchronization, and realize interference time synchronization and time keeping performance test; the selection of the reference time in the test process is more scientific and accurate, the external environment interference in the communication process between the distribution automation equipment and the distribution main station based on a wireless communication mode can be effectively eliminated, and the correctness of the test result is improved.
Drawings
Fig. 1 is a schematic structural diagram of a time synchronization and timekeeping test system of a distribution automation device according to the present invention;
fig. 2 is a test flowchart of a time synchronization and timekeeping test method of the distribution automation device according to the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a time setting and time keeping test system of distribution automation equipment, as shown in fig. 1, comprising:
the system comprises a standard clock module, a network interaction module, a simulation test master station, a time scale event trigger module and distribution automation equipment;
the network interaction module is respectively connected with the simulation test master station, the time scale event trigger module and the distribution automation equipment in a bidirectional mode;
the network interaction module is connected with the standard clock module in a one-way mode;
the simulation test master station is bidirectionally connected with the power distribution automation equipment;
the standard clock module is used for sending a GPS/Beidou system time service signal to the network interaction module and realizing SNTP time service of the distribution automation equipment;
the network interaction module is used for receiving the time service signal of the GPS/Beidou system to carry out self time calibration and is used as the standard clock time of the whole test system; building a local area network and providing a communication interface for access equipment;
the time scale event triggering module is used for sending a triggering event signal with a time scale to the distribution automation equipment according to a control command issued by the simulation test master station, and uploading triggering event information to the simulation test master station through the network interaction module;
the simulation test master station is used for issuing a control command to the time scale event trigger module; receiving the trigger event information uploaded by the time mark event trigger module, taking the action starting time in the trigger event information as reference time, receiving the message information with the time mark uploaded by the tested distribution automation equipment, extracting the current time of the distribution automation equipment, determining the current time error of the tested distribution automation equipment according to the reference time and the current time, and evaluating the time setting and time keeping performance of the distribution automation equipment according to the current time error.
And when the trigger event signal with the time mark is an analog switch opening and closing action signal, the trigger event information is analog switch opening and closing action information.
When the time scale event trigger module is a signal source and a wave recording module which are connected in sequence:
the signal source is used for simulating a distribution line current mutation or phase electric field intensity mutation operation scene according to a control command issued by the simulation test master station, sending a current mutation or phase electric field intensity mutation signal to the distribution automation equipment, and triggering the distribution line fault indicator to start a wave recording function;
and the wave recording module is used for monitoring and recording signals output by the signal source, generating a waveform file marking wave recording starting time parameters and uploading the waveform file to the simulation test master station through the network interaction module.
The determining the current time error of the distribution automation equipment to be tested according to the reference time and the current time, and evaluating the time setting and the time keeping performance of the distribution automation equipment according to the current time error comprises:
(1) determining a time setting error delta T1 of the tested distribution automation equipment to be T0-T1 according to a difference value between the reference time T0 and the current time T1, judging whether the time setting error delta T1 is smaller than a first threshold value, and if yes, carrying out the next test; otherwise, the time setting function of the tested distribution automation equipment does not meet the time setting requirement, and the test is finished;
(2) issuing a control command with invalid time to the tested distribution automation equipment, determining a time setting error delta T2 of the tested distribution automation equipment to be T2-T3 according to a difference value between reference time T0 and current time T1, judging whether the time setting error delta T2 is smaller than a first threshold value, and if so, carrying out the next test; otherwise, the time setting function of the tested distribution automation equipment does not meet the time setting requirement, and the test is finished;
(3) taking the action starting time in the trigger event information as reference time T4, taking the time of uploading the time scale event information by the distribution automation equipment as equipment current time T5, and determining the time setting error delta T3 of the measured distribution automation equipment to be T4-T5 according to the difference value between the reference time T4 and the current time T5;
(4) disconnecting a communication link with the distribution automation equipment and keeping the time-keeping time T required by the standby operation standard of the equipment;
reestablishing a network connection relation between the distribution automation equipment and the distribution automation equipment, and determining a time setting error delta T4 of the distribution automation equipment to be tested to be T6-T7 according to a difference value between the reference time T6 and the current time T7;
determining the time keeping error time delta t as delta t 4-delta t3 according to the difference value between the time setting error delta t4 and the time setting error delta t3, and judging whether the time keeping error time delta t is smaller than a second threshold value or not; if yes, the tested distribution automation equipment meets the requirements; otherwise, the tested distribution automation equipment does not meet the timekeeping requirement.
Simulation test main website with distribution automation equipment both way junction includes:
the simulation test main station is bidirectionally connected with the distribution automation equipment through an RJ Ethernet interface or an RS232 serial port.
The standard clock module and the network interaction module follow an SNTP protocol; the simulation test main station and the network interaction module follow a TCP (transmission control protocol), an IP (Internet protocol) and an IEC60870-5-104 protocol; the distribution automation equipment and the network interaction module conform to a TCP protocol, an IP protocol, an SNTP protocol and an IEC60870-5-104 protocol.
A time setting and time keeping test method for distribution automation equipment, the flow of the test method is shown in fig. 2, the method includes:
the standard clock module sends a GPS/Beidou system time service signal to the network interaction module, and SNTP time service of the distribution automation equipment is realized;
the network interaction module receives a time service signal of the GPS/Beidou system to carry out self time calibration and is used as the standard clock time of the whole test system;
the simulation test master station issues a control command to the time scale event trigger module;
the time scale event triggering module sends a triggering event signal with a time scale to the distribution automation equipment according to a control command issued by the simulation test master station, and uploads triggering event information to the simulation test master station through the network interaction module;
the simulation test master station receives the trigger event information uploaded by the time scale event trigger module, takes the action start time in the trigger event information as reference time, receives the message information with the time scale uploaded by the tested distribution automation equipment, extracts the current time of the distribution automation equipment, determines the current time error of the tested distribution automation equipment according to the reference time and the current time, and evaluates the time synchronization and time keeping performance of the distribution automation equipment according to the current time error.
And when the trigger event signal with the time mark is an analog switch opening and closing action signal, the trigger event information is analog switch opening and closing action information.
When the time scale event trigger module is a signal source and a wave recording module which are connected in sequence:
the signal source simulates an operation scene of current mutation or phase electric field intensity mutation of the distribution line according to a control command issued by the simulation test master station, sends a current mutation or phase electric field intensity mutation signal to the distribution automation equipment, and triggers a fault indicator of the distribution line to start a wave recording function;
and the wave recording module monitors and records signals output by the signal source, generates a waveform file marking wave recording starting time parameters and uploads the waveform file to the simulation test master station through the network interaction module.
The determining the current time error of the distribution automation equipment to be tested according to the reference time and the current time, and evaluating the time setting and the time keeping performance of the distribution automation equipment according to the current time error comprises:
(1) determining a time setting error delta T1 of the tested distribution automation equipment to be T0-T1 according to a difference value between the reference time T0 and the current time T1, judging whether the time setting error delta T1 is smaller than a first threshold value, and if yes, carrying out the next test; otherwise, the time setting function of the tested distribution automation equipment does not meet the time setting requirement, and the test is finished;
(2) interference time setting: the method comprises the steps that a simulation test master station issues a control command with invalid time to a tested distribution automation device, the time setting error delta T2 of the tested distribution automation device is determined to be T2-T3 according to the difference value between reference time T0 and current time T1, whether the time setting error delta T2 is smaller than a first threshold value or not is judged, and if yes, the next test is carried out; otherwise, the time setting function of the tested distribution automation equipment does not meet the time setting requirement, and the test is finished;
(3) the device timing success before the power distribution automation device performs the timekeeping performance test is ensured: taking the action starting time in the trigger event information as reference time T4, taking the time of uploading the time scale event information by the distribution automation equipment as equipment current time T5, and determining the time setting error delta T3 of the measured distribution automation equipment to be T4-T5 according to the difference value between the reference time T4 and the current time T5;
(4) disconnecting a communication link between the simulation test master station and the distribution automation equipment, and keeping the timekeeping time T required by the standby operation standard of the equipment;
reestablishing a network connection relation between the distribution automation equipment and the simulation test master station, and determining a time setting error delta T4 of the distribution automation equipment to be tested to be T6-T7 according to a difference value between the reference time T6 and the current time T7;
determining a timekeeping error delta t, namely delta t 4-delta t3 according to the difference value between the time setting error delta t4 and the time setting error delta t3, and judging whether the timekeeping error delta t is smaller than a second threshold value or not; if so, the tested distribution automation equipment meets the requirements; otherwise, the tested distribution automation equipment does not meet the timekeeping requirement.
The simulation test main station is bidirectionally connected with the distribution automation equipment through an RJ Ethernet interface or an RS232 serial port.
The standard clock module and the network interaction module follow an SNTP protocol; the simulation test master station and the network interaction module follow a TCP protocol, an IP protocol and an IEC60870-5-104 protocol; the distribution automation equipment and the network interaction module conform to a TCP protocol, an IP protocol, an SNTP protocol and an IEC60870-5-104 protocol.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A distribution automation device timing and timekeeping test system, the system comprising:
the system comprises a standard clock module, a network interaction module, a simulation test master station, a time scale event trigger module and distribution automation equipment;
the network interaction module is respectively connected with the simulation test master station, the time scale event trigger module and the distribution automation equipment in a bidirectional mode;
the network interaction module is connected with the standard clock module in a one-way mode;
the simulation test master station is bidirectionally connected with the power distribution automation equipment;
the standard clock module is used for sending a GPS/Beidou system time service signal to the network interaction module and realizing SNTP time service of the distribution automation equipment;
the network interaction module is used for receiving the time service signal of the GPS/Beidou system to carry out self time calibration and is used as the standard clock time of the whole test system; the system is also used for building a local area network and providing a communication interface for the access equipment;
the time scale event triggering module is used for sending a triggering event signal with a time scale to the distribution automation equipment according to a control command issued by the simulation test master station, and uploading triggering event information to the simulation test master station through the network interaction module;
the simulation test master station is used for issuing a control command to the time scale event trigger module; receiving trigger event information uploaded by the time scale event trigger module, taking action starting time in the trigger event information as reference time, receiving message information with time scales uploaded by the tested distribution automation equipment, extracting current time of the distribution automation equipment, determining a current time error of the tested distribution automation equipment according to the reference time and the current time, and evaluating time-setting and time-keeping performance of the distribution automation equipment according to the current time error;
the time scale event trigger module comprises a signal source and a wave recording module which are connected in sequence;
the signal source is used for simulating a distribution line current mutation or phase electric field intensity mutation operation scene according to a control command issued by the simulation test master station, sending a current mutation or phase electric field intensity mutation signal to the distribution automation equipment, and triggering the distribution line fault indicator to start a wave recording function;
and the wave recording module is used for monitoring and recording signals output by the signal source, generating a waveform file marking wave recording starting time parameters and uploading the waveform file to the simulation test master station through the network interaction module.
2. The system as claimed in claim 1, wherein the trigger time-scale event signal is an analog switch on/off action signal, and the trigger event information is an analog switch on/off action information.
3. The system of claim 1, wherein determining a current time error of the distribution automation device under test according to the reference time and the current time, and evaluating the time-to-time and time-keeping performance of the distribution automation device according to the current time error comprises:
(1) determining a time setting error delta T1= T0-T1 of the tested distribution automation equipment according to a difference value between the reference time T0 and the current time T1, judging whether the time setting error delta T1 is smaller than a first threshold value, and if yes, carrying out the next test; otherwise, the time setting function of the tested distribution automation equipment does not meet the time setting requirement, and the test is finished;
(2) issuing a control command with invalid time to the tested distribution automation equipment, determining a time setting error delta T2= T2-T3 of the tested distribution automation equipment according to a difference value between the trigger time T2 and the current time T3 of the equipment, judging whether the time setting error delta T2 is smaller than a first threshold value, and if so, carrying out the next test; otherwise, the time setting function of the tested distribution automation equipment does not meet the time setting requirement, and the test is finished;
(3) taking the action starting time in the trigger event information as reference time T4, taking the time of uploading the time scale event information by the distribution automation equipment as equipment current time T5, and determining the time setting error delta T3= T4-T5 of the measured distribution automation equipment according to the difference value between the reference time T4 and the current time T5;
(4) disconnecting a communication link with the distribution automation equipment and keeping the time-keeping time T required by the standby operation standard of the equipment;
reestablishing a network connection relation with the distribution automation equipment, and determining a time setting error delta T4= T6-T7 of the distribution automation equipment to be tested according to a difference value between the reference time T6 and the current time T7;
determining the time keeping error time delta t =deltat 4-delta t3 according to the difference value between the time setting error delta t4 and the time setting error delta t3, and judging whether the time keeping error time delta t is smaller than a second threshold value or not; if so, the tested distribution automation equipment meets the requirements; otherwise, the tested distribution automation equipment does not meet the timekeeping requirement.
4. The system of claim 1, wherein the analog test master station is bi-directionally coupled to the distribution automation device, comprising:
the simulation test main station is bidirectionally connected with the distribution automation equipment through an RJ Ethernet interface or an RS232 serial port.
5. The system of claim 1, wherein the standard clock module and the network interaction module conform to SNTP protocol; the simulation test main station and the network interaction module follow a TCP (transmission control protocol), an IP (Internet protocol) and an IEC60870-5-104 protocol; the distribution automation equipment and the network interaction module conform to a TCP protocol, an IP protocol, an SNTP protocol and an IEC60870-5-104 protocol.
6. A time setting and time keeping test method for distribution automation equipment is characterized by comprising the following steps:
the standard clock module sends a GPS/Beidou system time service signal to the network interaction module, and SNTP time service of the distribution automation equipment is realized;
the network interaction module receives a time service signal of the GPS/Beidou system to carry out self time calibration and is used as the standard clock time of the whole test system;
the simulation test master station issues a control command to the time scale event trigger module;
the time scale event triggering module sends a triggering event signal with a time scale to the distribution automation equipment according to a control command issued by the simulation test master station, and uploads triggering event information to the simulation test master station through the network interaction module;
the simulation test master station receives the trigger event information uploaded by the time scale event trigger module, takes the action start time in the trigger event information as reference time, receives the message information with the time scale uploaded by the tested distribution automation equipment, extracts the current time of the distribution automation equipment, determines the current time error of the tested distribution automation equipment according to the reference time and the current time, and evaluates the time synchronization and time keeping performance of the distribution automation equipment according to the current time error;
the time scale event trigger module comprises a signal source and a wave recording module which are connected in sequence;
the signal source simulates an operation scene of current mutation or phase electric field intensity mutation of the distribution line according to a control command issued by the simulation test master station, sends a current mutation or phase electric field intensity mutation signal to the distribution automation equipment, and triggers a fault indicator of the distribution line to start a wave recording function;
and the wave recording module monitors and records signals output by the signal source, generates a waveform file marking wave recording starting time parameters and uploads the waveform file to the simulation test master station through the network interaction module.
7. The method as claimed in claim 6, wherein the trigger time-scale event signal is an analog switch on/off action signal, and the trigger event information is an analog switch on/off action information.
8. The method of claim 6, wherein determining a current time error of the distribution automation device under test according to the reference time and the current time, and evaluating the pair-time and timekeeping performance of the distribution automation device according to the current time error comprises:
(1) determining a time setting error delta T1= T0-T1 of the tested distribution automation equipment according to a difference value between the reference time T0 and the current time T1, judging whether the time setting error delta T1 is smaller than a first threshold value, and if yes, carrying out the next test; otherwise, the time setting function of the tested distribution automation equipment does not meet the time setting requirement, and the test is finished;
(2) the method comprises the steps that a simulation test master station issues a control command with invalid time to a tested distribution automation device, time setting error delta T2= T2-T3 of the tested distribution automation device is determined according to a difference value between trigger time T2 and current time T3 of the device, whether the time setting error delta T2 is smaller than a first threshold value or not is judged, and if yes, the next test is carried out; otherwise, the time setting function of the tested distribution automation equipment does not meet the time setting requirement, and the test is finished;
(3) taking the action starting time in the trigger event information as reference time T4, taking the time of uploading the time scale event information by the distribution automation equipment as equipment current time T5, and determining the time setting error delta T3= T4-T5 of the measured distribution automation equipment according to the difference value between the reference time T4 and the current time T5;
(4) disconnecting a communication link between the simulation test master station and the distribution automation equipment, and keeping the timekeeping time T required by the standby operation standard of the equipment;
reestablishing a network connection relation between the distribution automation equipment and the simulation test master station, and determining a time setting error delta T4= T6-T7 of the distribution automation equipment to be tested according to a difference value between the reference time T6 and the current time T7;
determining a punctuality error delta t =deltat 4-delta t3 according to a difference value between the time setting error delta t4 and the time setting error delta t3, and judging whether the punctuality error delta t is smaller than a second threshold value or not; if so, the tested distribution automation equipment meets the requirements; otherwise, the tested distribution automation equipment does not meet the timekeeping requirement.
9. The method of claim 6, wherein the analog test master station is bidirectionally coupled to the distribution automation device via an RJ Ethernet interface or an RS232 serial port.
10. The method of claim 6, wherein the standard clock module and the network interaction module conform to SNTP protocol; the simulation test main station and the network interaction module follow a TCP (transmission control protocol), an IP (Internet protocol) and an IEC60870-5-104 protocol; the distribution automation equipment and the network interaction module conform to a TCP protocol, an IP protocol, an SNTP protocol and an IEC60870-5-104 protocol.
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| CN112422223B (en) * | 2020-11-06 | 2022-06-03 | 华能新能源股份有限公司河北分公司 | TCP/IP-based time synchronization device, time synchronization method and time mark monitoring system |
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