CN102055544B - System and method for synchronously monitoring secondary equipment time of power supply system - Google Patents

System and method for synchronously monitoring secondary equipment time of power supply system Download PDF

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Publication number
CN102055544B
CN102055544B CN201010581365.XA CN201010581365A CN102055544B CN 102055544 B CN102055544 B CN 102055544B CN 201010581365 A CN201010581365 A CN 201010581365A CN 102055544 B CN102055544 B CN 102055544B
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time
time synchronized
harvester
monitoring
unit
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CN102055544A (en
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刘晓川
许振山
骆飞
魏旺全
唐勇
兰凌美
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CHENGDU YINZHONG DIGITAL EQUIPMENT Co Ltd
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CHENGDU YINZHONG DIGITAL EQUIPMENT Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20Smart grids as enabling technology in buildings sector
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S40/00Systems 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
    • Y04S40/12Systems 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
    • Y04S40/124Systems 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 wired telecommunication networks or data transmission busses

Abstract

The invention relates to an industry automation information monitoring technology and discloses a system for synchronously monitoring secondary equipment time of a power supply system, which solves the problems of low accuracy and poor stability of secondary equipment time in the prior art. The main point of the technical scheme is as follows: the system comprises a station monitoring system, a network switch and a secondary equipment unit, the secondary equipment unit is connected with the station monitoring system through the network switch; the system also comprises a time synchronization acquiring device and a time synchronization monitoring background machine, the time synchronization acquiring device is connected with the secondary equipment unit, and the time synchronization monitoring background machine is connected with the network switch and the time synchronization acquiring device. Furthermore, the invention discloses a method for synchronously monitoring secondary equipment time of the power supply system. The invention is suitable for the secondary equipment time monitoring in all power stations and converting stations.

Description

Secondary equipment in power system system for monitoring time synchronization and monitoring method
Technical field
The present invention relates to industrial automation information monitoring technology, particularly relate to secondary device system for monitoring time synchronization and monitoring method in electric power system.
Background technology
In electric power system; secondary device is the general name ensureing all kinds of automation equipments that electric power system normally runs; comprise time synchronism apparatus, protective device, telemechanical apparatus (supervising device), measurement mechanism (phasor measuring set, equipment for monitoring power quality, thunder and lightning measurement mechanism), tape deck (fault wave recording device), metering device (intelligent electric meter) etc.; wherein time synchronism apparatus can provide time signal and time message information output interface, and other secondary device can only time of reception signal or time message information use.In order to ensure the correctness of real-time process and the authenticity of historical data of these secondary devices, need its time synchronized.At present, whether the time of each secondary device synchronously becomes the bottleneck of the digitlization of restriction transformer station, electrical network intelligent development.Although time synchronism apparatus can provide the unified time, the accuracy of the time provided and stability cannot be monitored, and whether other secondary device correctly also has no way of on the time uses is understood, and the problems referred to above are all urgently to be resolved hurrily.
Time synchronism apparatus (GPS timing device) is all installed in current electric substation automation system, has provided lock in time also to other secondary devices, but still occur the situation that same fault time is inconsistent in fault data, waveform analysis.Trace it to its cause following some: 1. the reliability and stability of time synchronism apparatus are not high, and as single master clock, single gps clock source, it is all without high-precision punctual ability; 2. other secondary device itself is to time signal process defectiveness, and as pulse signal and the cooperation of serial ports time, the decoding of IRIG-B, majority adopts software simulating but not hardware implementing, easily occurs that process leads to errors not in time; 3. fault-tolerant processing ability, when signal be interfered can not identify and employ mistake signal, cause timing error, also cannot correct.
In conventional art to the processing mode of the problems referred to above be select to do more powerful by clock synchronization system, stability is higher, the time-triggered protocol of automation equipment is more perfect, but can significantly improve the difficulty of design like this, and reliability is not high.And if select to provide the time synchronism apparatus of temporal information and service time information the using state of secondary device carry out on-line monitoring, analyze correctness and the index such as time precision, stability of secondary device time, greatly will certainly improve time stability, the reliability of secondary device, and which implements also simple.A kind of secondary equipment in power system system for monitoring time synchronization and monitoring method is not also had to occur at present.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of secondary equipment in power system system for monitoring time synchronization and monitoring method, solves that secondary device time precision in conventional art is low, the problem of poor stability.
The present invention solves the problems of the technologies described above adopted technical scheme: secondary equipment in power system system for monitoring time synchronization, comprise the substation supervisory control system network switch, secondary device unit, described secondary device unit connects substation supervisory control system by the network switch, this secondary equipment in power system system for monitoring time synchronization also comprises time synchronized harvester and time synchronized monitoring background computer, described time synchronized harvester connecting secondary unit, described time synchronized monitoring background computer interconnection network switch and time synchronized harvester, described time synchronized harvester be used for time synchronized monitor background computer carry out PTP network pair time, and gather the temporal information of each secondary device, send time synchronized monitoring background computer to, when described time synchronized monitoring background computer is used for carrying out PTP network pair with time synchronized harvester, time of reception synchronous acquisition device transmit secondary device temporal information and arrange, SOE information is extracted from substation supervisory control system, temporal information in conjunction with the secondary device after arrangement generates the clock of each secondary device, the clock of each secondary device and standard clock source are compared and analyzes, count walking time error and stability and with chart display, walking time error or stability secondary device not up to standard is reported to the police to exceeding setting of each secondary device.
Described secondary device unit is the combination of time synchronism apparatus and the secondary device possessing On-off signal, described time synchronism apparatus connects the secondary device, time synchronized harvester and the network switch that possess On-off signal, described in possess secondary device interconnection network switch and the time synchronized harvester of On-off signal.
Described secondary device unit is the combination of time synchronism apparatus and the secondary device not possessing On-off signal and serial network server, described time synchronism apparatus interconnection network switch and time synchronized harvester, the described secondary device not possessing On-off signal by serial network server interconnection network switch, described serial network server connect time synchronous acquisition device.
Described secondary device unit is time synchronism apparatus and the combination possessing the secondary device of On-off signal, the secondary device not possessing On-off signal and serial network server; Described time synchronism apparatus connects the secondary device, time synchronized harvester and the network switch that possess On-off signal, described secondary device interconnection network switch and the time synchronized harvester possessing On-off signal, the described secondary device not possessing On-off signal by serial network server interconnection network switch, described serial network server connect time synchronous acquisition device.
Described time synchronized monitoring background computer adopts the industrial computer possessing master clock board.
Described time synchronized harvester possesses power insert, frequency marking plug-in unit, CPU card and optional plug-in unit, and described optional plug-in unit comprises Ethernet plug-in unit, RS-232/422/485 communication interface plug-in unit, RS-485 input interface plug-in unit, RS-485 output interface plug-in unit, TTL input interface plug-in unit, TTL output interface plug-in unit, optical fiber input interface plug-in unit, optical fiber output interface plug-in unit, Puled input interface card and pulse output interface plug-in unit.
Secondary equipment in power system time synchronized monitoring method, comprises the following steps:
A. time synchronized harvester and time synchronized are monitored background computer and are carried out PTP(precision time protocol) network pair time;
B. time synchronized harvester gathers the temporal information of each secondary device, and sends time synchronized monitoring background computer to;
C. time synchronized monitoring background computer receives above-mentioned temporal information and arranges;
D. time synchronized monitoring background computer extracts SOE(sequence of events recording from substation supervisory control system) information, the temporal information after arranging in integrating step c generates the clock of each secondary device;
E. the clock of each secondary device generated and standard clock source compare and analyze by time synchronized monitoring background computer, count walking time error and stability and showing with chart of each secondary device;
F. time error is walked or stability secondary device not up to standard is reported to the police to exceeding setting.
Further, after step f, also step g is comprised: the result after the clock of secondary device each in step e and standard clock source compare of analysis is sent to higher level control centre by each plant stand time synchronized monitoring background computer.
In step a, time synchronized monitoring background computer as master clock, time synchronized harvester as from clock, when realizing PTP network pair according to IEEE1588 precision time protocol, pair time interval 2s, pair time precision 20ns.
In step b, the method that time synchronized harvester gathers the temporal information of each secondary device is:
B1. for time synchronism apparatus, direct acquisition time signal;
B2. for the secondary device possessing On-off signal, by time synchronized harvester output time pulse-triggered, it produces sequence of events recording, is extracted the time of event triggering by substation supervisory control system;
B3. for the secondary device not possessing On-off signal, by the response of time synchronized harvester by message during serial ports monitoring pair, extracting time information.
The invention has the beneficial effects as follows: the time state of secondary device is monitored, Timeliness coverage Resolving probiems problem, thus improve correctness, the stability of secondary device time, improve time precision, ensure that equipment normally runs to greatest extent.
Accompanying drawing explanation
Fig. 1 is secondary equipment in power system system for monitoring time synchronization structured flowchart in embodiments of the invention;
Fig. 2 is secondary equipment in power system time synchronized monitoring method flow chart of the present invention;
Fig. 3 is the background process flow chart of the time synchronized harvester in the present invention;
Fig. 4 is the background process flow chart of the time synchronized monitoring background computer in the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
The invention discloses a kind of secondary equipment in power system system for monitoring time synchronization, it adds the time synchronized harvester of secondary device time state collection and monitor and time synchronized monitoring background computer in traditional substation automation system, by carrying out analyzing and processing to the time signal collected, Timeliness coverage Resolving probiems problem, thus improve correctness, the stability of secondary device time, improve time precision, ensure that equipment normally runs to greatest extent.The invention also discloses secondary equipment in power system time synchronized monitoring method.
Embodiment:
As shown in Figure 1, the secondary equipment in power system system for monitoring time synchronization in this example, comprises substation supervisory control system, the network switch, secondary device unit, time synchronized harvester and time synchronized monitoring background computer; Secondary device unit connects substation supervisory control system by the network switch, time synchronized harvester connecting secondary unit, and time synchronized harvester is by time synchronized monitoring background computer interconnection network switch.Wherein, secondary device unit is made up of time synchronism apparatus, the secondary device of standby On-off signal, the secondary device not possessing On-off signal and serial network server, and the secondary device possessing On-off signal is all connected with the network switch, time synchronism apparatus, time synchronized harvester; The secondary device not possessing On-off signal is connected with time synchronized harvester, and by serial network server access network switch.
In this example; the secondary device possessing On-off signal can be: protective device, telemechanical apparatus, measurement mechanism, tape deck etc.; they can directly be connected with time synchronism apparatus; time synchronized is realized with time of reception signal; the secondary device (as: intelligent electric meter etc.) not possessing On-off signal is then needed by serial network server access network switch, thus time of reception synchronizing signal realizes time synchronized.
Time synchronized monitoring background computer can adopt industrial computer, increase by one piece of master clock board, master clock board and industrial computer adopt pci bus to be connected, major function device on master clock board comprise CPU(as: AT91RM200), 4M FLASH, 64M SDRAM, GPS receiver module, 10M constant-temperature crystal oscillator, 2 Ethernet network interfaces (as: DP83640) with PTP protocol, one of them network interface as the master clock to next stage (time synchronized harvester), another as to upper level (control centre) from clock.
The background process flow process of time synchronized monitoring background computer as shown in Figure 4, comprises 6 parts: during 1.PTP couple: when carrying out PTP network pair with time synchronized harvester; 2. receive the temporal information arranging each equipment: the network message of time of reception synchronous acquisition device, arranges the temporal information of each equipment; 3. extract SOE information from substation supervisory control system; 4. generate the clock of each equipment; 5. the clocking error of each equipment of statistical analysis and stability; 6. carry out chart display and warning.
Time synchronized harvester can adopt the back of the body to insert formula 19 〞 standard PC case, indispensable plug-in unit comprises: power insert, frequency marking plug-in unit and CPU card, optional plug-in unit comprises: Ethernet plug-in unit, RS-232/422/485 communication interface plug-in unit, RS-485 input interface plug-in unit, RS-485 output interface plug-in unit, TTL input interface plug-in unit, TTL output interface plug-in unit, optical fiber input interface plug-in unit, optical fiber output interface plug-in unit, Puled input interface card and pulse output interface plug-in unit.2 power inserts are the power supply reliabilities in order to ensure device, and working power input voltage is that 220V AC/220V DC/110V DC is general.Establish 10M constant-temperature crystal oscillator in frequency marking plug-in unit, after taming, time keeping error is less than 1 μ s/h.Establish AT91RM9200,4M FLASH, 64M SDRAM, FPGA and DP83640 in CPU card, the Ethernet network interface of the PTP protocol provided is from clock.Remaining optional plug-in unit is matched according to actual conditions.Ethernet plug-in unit provides 4 RJ45 Ethernet interfaces, can realize NTP/SNTP procotol; RS-232/422/485 communication interface plug-in unit provides 4 DB9 interfaces; RS-485 input interface plug-in unit provides 16 road RS-485 differential signal inputs; RS-485 output interface plug-in unit provides 16 road RS-485 differential signals to export; TTL input interface plug-in unit provides 16 road TTL to input; TTL output interface plug-in unit provides 16 road TTL to export; Optical fiber input interface plug-in unit provides 8 road ST optical fiber inputs; Optical fiber output interface plug-in unit provides 8 road ST optical fiber to export; Puled input interface card provides 16 tunnel inputs, maximum input voltage 250V DC; Pulse output interface plug-in unit provides 16 tunnels to export, the highest withstand voltage 250V DC of OC door.The error of the input that time synchronized harvester provides, output time signal is less than 100ns.
The background process flow process of time synchronized harvester as shown in Figure 3, comprises 5 parts: during 1.PTP couple: when reception and time synchronized monitor the PTP network pair of background computer; 2. network message process: receive network interface time message, logging timestamp and device number; 3. serial ports time message process: receive serial ports time message, logging timestamp and device number; 4. time signal process: pull-in time signal edge, resolves time signal, logging timestamp and device number; 5. output of pulse signal: the pulse at particular moment and interval is exported, recording impulse output time.
Setting forth below utilizes above-mentioned secondary equipment in power system system for monitoring time synchronization to carry out the method for time synchronized monitoring:
As shown in Figure 2, the method comprises the following steps:
1. time synchronized harvester and time synchronized monitor background computer when carrying out PTP network pair: time synchronized monitors background computer as master clock, time synchronized harvester is as from clock, when realizing PTP network pair according to IEEE1588 precision time protocol, pair time interval 2s, pair time precision 20ns;
2. time synchronized harvester gathers the temporal information of each secondary device, and sending time synchronized monitoring background computer to: the collection for secondary device temporal information divides three kinds of situation: a. to the collection of the temporal information of time synchronism apparatus: the time signal of directly time of reception synchronizer output, the time signal of reception is added a cover internal time stamp, be sent to time synchronized monitoring background computer by Ethernet; B. to the collection of temporal information of secondary device possessing On-off signal: export PPS (pulse per second (PPS))/PPM (point pulse)/PPH (time pulse) or specific time interval pulse by time synchronized harvester, trigger these secondary devices and produce SOE information or switching value displacement information, these logouts by gather be sent to substation supervisory control system or control centre SCADA/EMS system in, the time that the SCADA/EMS system extraction event that time synchronized monitoring background computer passes through substation supervisory control system or control centre triggers, thus obtain temporal information; C. to the collection of temporal information of secondary device not possessing On-off signal: time synchronized harvester monitor in serial communication pair time message information, add a cover internal time stamp, be sent to time synchronized monitoring background computer by Ethernet.
3. time synchronized monitoring background computer receives above-mentioned temporal information and arranges;
4. time synchronized monitoring background computer is from the SCADA(data acquisition of substation supervisory control system or control centre and supervisor control)/EMS(energy management system) system extracts the time pulse that relevant secondary device (possessing the secondary device of On-off signal) exports because of time synchronized harvester and the SOE information produced, and generates the clock of each secondary device in conjunction with the temporal information after previous step arrangement;
5. carry out clock compare of analysis, count walking time error and stability and showing with chart of each secondary device: the clock of each secondary device generated and standard clock source compare and analyze by time synchronized monitoring background computer, here standard clock source can the gps clock source of select time Simultaneous Monitoring background computer itself, when there is PTP network between control centre and plant stand, also can select time synchronized to monitor clock that background computer receives from control centre as standard clock source; After comparison, what can count each secondary device walks time error, consistency and stability, and graphically shows;
6. pair to exceed setting and walk the secondary device of time error or the undesirable secondary device of stability carries out alarm, so that staff's Timeliness coverage, process in time;
7. analysis result is sent to administrative control centre by electric power data private network by each plant stand time synchronized monitoring background computer, and local level control centre forwards the data to provincial control centre again.Therefore, in each power plant, each transformer station, control centre at different levels can monitor the temporal information of administrative equipment.

Claims (9)

1. secondary equipment in power system system for monitoring time synchronization, comprise substation supervisory control system, the network switch, secondary device unit, described secondary device unit connects substation supervisory control system by the network switch, it is characterized in that: also comprise time synchronized harvester and time synchronized monitoring background computer; Described time synchronized harvester connecting secondary unit, described time synchronized monitoring background computer interconnection network switch and time synchronized harvester;
Described time synchronized harvester is used for monitor with time synchronized background computer when carrying out PTP network pair, and gathers the temporal information of each secondary device, sends time synchronized to and monitor background computer, when described time synchronized monitoring background computer is used for carrying out PTP network pair with time synchronized harvester, time of reception synchronous acquisition device transmit secondary device temporal information and arrange, SOE sequence of events recording information is extracted from substation supervisory control system, temporal information in conjunction with the secondary device after arrangement generates the clock of each secondary device, the clock of each secondary device and standard clock source are compared and analyzes, count walking time error and stability and showing with chart of each secondary device, time error is walked or stability secondary device not up to standard is reported to the police to exceeding setting,
The mode that described time synchronized harvester and time synchronized are monitored when background computer carries out PTP network pair is: time synchronized monitors background computer as master clock, time synchronized harvester is as from clock, when realizing PTP network pair according to IEEE 1588 precision time protocol, pair time interval 2s, pair time precision 20ns.
2. secondary equipment in power system system for monitoring time synchronization as claimed in claim 1, it is characterized in that: described secondary device unit is the combination of time synchronism apparatus and the secondary device possessing On-off signal, described time synchronism apparatus connects the secondary device, time synchronized harvester and the network switch that possess On-off signal, described in possess secondary device interconnection network switch and the time synchronized harvester of On-off signal.
3. secondary equipment in power system system for monitoring time synchronization as claimed in claim 1, it is characterized in that: described secondary device unit is the combination of time synchronism apparatus and the secondary device not possessing On-off signal and serial network server, described time synchronism apparatus interconnection network switch and time synchronized harvester, the described secondary device not possessing On-off signal by serial network server interconnection network switch, described serial network server connect time synchronous acquisition device.
4. secondary equipment in power system system for monitoring time synchronization as claimed in claim 1, is characterized in that: described secondary device unit is time synchronism apparatus and the combination possessing the secondary device of On-off signal, the secondary device not possessing On-off signal and serial network server; Described time synchronism apparatus connects the secondary device, time synchronized harvester and the network switch that possess On-off signal, described secondary device interconnection network switch and the time synchronized harvester possessing On-off signal, the described secondary device not possessing On-off signal by serial network server interconnection network switch, described serial network server connect time synchronous acquisition device.
5. secondary equipment in power system system for monitoring time synchronization as claimed in claim 1, is characterized in that: described time synchronized monitoring background computer adopts the industrial computer possessing master clock board.
6. the secondary equipment in power system system for monitoring time synchronization as described in claim 1 to 5 any one, it is characterized in that: described time synchronized harvester possesses power insert, frequency marking plug-in unit, CPU card and optional plug-in unit, described optional plug-in unit comprises Ethernet plug-in unit, RS-232/422/485 communication interface plug-in unit, RS-485 input interface plug-in unit, RS-485 output interface plug-in unit, TTL input interface plug-in unit, TTL output interface plug-in unit, optical fiber input interface plug-in unit, optical fiber output interface plug-in unit, Puled input interface card and pulse output interface plug-in unit.
7. secondary equipment in power system time synchronized monitoring method, is characterized in that: comprise the following steps:
A. time synchronized harvester and time synchronized monitor background computer when carrying out PTP network pair;
B. time synchronized harvester gathers the temporal information of each secondary device, and sends time synchronized monitoring background computer to;
C. time synchronized monitoring background computer receives above-mentioned temporal information and arranges;
D. time synchronized monitoring background computer extracts SOE sequence of events recording information from substation supervisory control system, and the temporal information after arranging in integrating step c generates the clock of each secondary device;
E. the clock of each secondary device generated and standard clock source compare and analyze by time synchronized monitoring background computer, count walking time error and stability and showing with chart of each secondary device;
F. time error is walked or stability secondary device not up to standard is reported to the police to exceeding setting;
In step a, time synchronized monitoring background computer as master clock, time synchronized harvester as from clock, when realizing PTP network pair according to IEEE1588 precision time protocol, pair time interval 2s, pair time precision 20ns.
8. secondary equipment in power system time synchronized monitoring method as claimed in claim 7, is characterized in that: after step f, also comprise step g: the result after the clock of secondary device each in step e and standard clock source compare of analysis is sent to higher level control centre by each plant stand time synchronized monitoring background computer.
9. secondary equipment in power system time synchronized monitoring method as claimed in claim 7 or 8, it is characterized in that: in step b, the method that time synchronized harvester gathers the temporal information of each secondary device is:
B1. for time synchronism apparatus, direct acquisition time signal;
B2. for the secondary device possessing On-off signal, by time synchronized harvester output time pulse-triggered, it produces sequence of events recording, is extracted the time of event triggering by substation supervisory control system;
B3. for the secondary device not possessing On-off signal, by the response of time synchronized harvester by message during serial ports monitoring pair, extracting time information.
CN201010581365.XA 2010-12-09 2010-12-09 System and method for synchronously monitoring secondary equipment time of power supply system Active CN102055544B (en)

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