CN1630160A - Method for establishing electric network monitoring disaster back-up system - Google Patents
Method for establishing electric network monitoring disaster back-up system Download PDFInfo
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Abstract
An optical semiconductor device contains P type semiconductor substrate, P type epitaxy layer, N type cathode surface layer, optical receiving component formed of P type epitaxy layer and cathode surface layer, micro reflection mirror area formed from channel part, semiconductor laser chip fixed on bottom of channel part, and anode buried layer, so the optical receiving component having high speed action and high optical receiving sensitivity and luminous component having semiconductor laser chip can be integrated in one substrate.
Description
Technical field
The present invention relates to a kind of method of setting up power system monitor disaster back-up system, especially a kind of method of setting up by the power system monitor strange land disaster back-up system of the interconnected realization of telecommunication network belongs to power system monitor facility technology field.
Background technology
Along with the raising of Automation of Electric Systems degree, the production run of electrical network, commander and scheduling more and more depend on all kinds of computer supervisory control systems.Application number is that 02110057.8 Chinese patent application discloses a kind of real-time monitor and analysis system for power supply network, this system is made of the electric quantity acquisition terminal and the main website processing terminal that connect by RS-485, by its exchanges data, processing each other, can carry out multi-faceted detection to user's electricity consumption situation automatically; Application number is that 03136931.6 Chinese patent application then discloses a kind of method and system device that is used for the accident analysis monitoring of supply network; the leading-out terminal of the power line input divergent ends that need monitor at supply network and control point user's electric power meter is installed current sensor respectively; with the intellectual monitoring device vector current signal of circuit being flowed difference calculates; by special-purpose or public cordless communication network respectively regularly and will flow the difference calculated data synchronously and be transferred to master station of system, and then the electricity consumption situation of section sometime to certain control point of supply network of can realizing is in normally or malfunction is analyzed and point out or report to the police
Be showing improvement or progress day by day and the management of improving to electric power system of grid monitoring system bring very big facility; simultaneously, feasible the born time to system-down of the uninterrupted characteristics of carrying out continuously of the increasingly sophisticated and electrical production of modernized electric network composition itself becomes shorter and shorter.If because of big fire, floods, earthquake or other natural calamity cause power network dispatching system or monitoring system of electric substation collapse, dispatcher, substation operation personnel also become " deaf person " " blind person " thereupon, electrical network is in and can not monitors and state of a control, and such consequence is with the safe and stable operation of serious threat electrical network.
In order to avoid the appearance of above-mentioned crisis as possible, people have adopted some technical measures to improve system reliability, as the local active standby Hot Spare etc., strengthen the availability of operation system by realizing system's pith redundancy.But, no matter which type of measure software and hardware is taked, when unpredictable disaster came such as fire, existing supervisory control system still can lose efficacy in moment.
Be not difficult to expect that obviously big, operation of investment and management cost height with regard to present national conditions, do not have feasibility though important system is set up the scheme of strange land disaster backup system.
Summary of the invention
The objective of the invention is: at the shortcoming of above prior art existence, propose a kind of not only can remote backup power network dispatching system synchronously or monitoring system of electric substation data, and invest the method for setting up power system monitor disaster back-up system little, operational management cost economy.
The applicant is after having compared the various technical schemes that reach the foregoing invention purpose, recognize, setting up standby each other if can overlap between relevant strange land dispatching of power netwoks supervisory control system and the transformer station's centralized monitoring system existing two, then will be the desired technical that reaches the object of the invention.
Understand according to the applicant, centralized control center system of transformer station is all had in present many urban electricity supply enterprise, and there are similarity in itself and dispatching automation EMS (energy management system) system receiving on transformer station's information and SCADA (transformer station's centralized control system) basic function.But, can't realize under existence conditions that therefore inter-system data is shared and standby each other because different system generally all is to set up independently SCADA data model separately.
But, if can set up unified SCADA data model to two cover systems, and consistent updates and data interaction by the network communication implementation model between two systems, then not only can be according to jurisdiction and responsibility of maintenance ownership, information sharing realization such as network model maintenance, picture, form are safeguarded, and the real time data that might realize two systems fully is synchronous and shared, thereby reach standby each other purpose.
In order to solve above technical problem, the method that the present invention sets up power system monitor disaster back-up system operate in by at least two covers be connected with subordinate transformer station respectively, can the strange land grid monitoring system of independent operating in, described grid monitoring system comprises:
The advance data collecting unit---in order to gather receiving real time information such as each subordinate's transformer substation voltage, electric current, meritorious, idle value and switch tool state, and be transferred to front server;
Front server---with advance data collecting unit signal transmitted treatment conversion is engineering information, is transported to other work stations in native system database server and the system then;
Database server (DB server)---the engineering information historical datas of carrying in order to storage native system data model information and preprocessor etc. provide the query and search service;
Work station---in order to native system is carried out each generic operation such as electric network model data change;
System switch---connect in order to realize the network between the native system computer, and front server is connected with network between the advance data collecting unit;
It is characterized in that:
Described grid monitoring system also comprises in order to network router interconnected between the realization system and telecommunication network connection device, realizes physical connection by optical cable, bridge and network router between the described at least two cover strange land grid monitoring systems;
Behind the system initialization, when the attendant when work station carries out the electric network model data change, database server is transferred to each computer of native system with changed information, simultaneously after receiving the model data changed information of work station
---as send server,, carry out data communication by the corresponding with service device in router and the other system, the implementation model data synchronization according to following steps;
1), be that purpose sends, the model changed information is formed real-time packet, with the NIC address of other system corresponding with service device at scheduled time slot;
2), after other system corresponding with service device receives, should feed back response message, as not receiving response message in the given time, the local message file of target when then this send server saves as band in chronological order with real-time packet;
3), whether test exist local message file, as existing, then waits for next period, is purpose with the NIC address of other system corresponding server, press the time sequencing of message formation, sends local message one by one;
4), after other system corresponding with service device receives, should feed back response message, as not receiving response message pre-in regularly, then this database server suspends and sends, and treats next period, continues to send to go up the local message of bar;
5), in step 3)-4) process in, form new real-time packet as this database server, then it is saved as in chronological order the local message file of when band target;
6), as the test result of step 3) for not existing, then go to step 1);
---as reception server, realize data communication by the corresponding with service device in network router and the other system according to following steps:
1), receive the message that other system corresponding with service device sends after, the feedback response message;
2), according to the model database on the message update service device that receives, and other work stations of broadcast announcement native system upgrade its this machine real-time data base.
In addition, described front server is an engineering information with each subordinate transformer station information translation of gathering in real time under normal circumstances, is transported to the native system database server; Under the situation that the one or more transformer stations of this side system message pick-up interrupts, will receive this transformer station's real time information of opposite side system forwards automatically by network router, thereby realize that real time information is standby each other.
The present invention has not only proposed to set up the thinking of standby each other between existing two cover strange land dispatching of power netwoks supervisory control systems and transformer station's centralized monitoring system, and provided the concrete technical scheme that can realize, characteristics according to the dispatching and monitoring system, some (being generally two) related power system monitor computer network management system is carried out database and model integration design, realize system interconnect with network router then, mode by network message communication between the employing system, guaranteeing on the synchronous basis of remote system model data, the ingenious mutual backup that has realized advance data, neither influence the original operation function of management system, can not cause the storage confusion again, properly settled the problem of power system monitor computer network management system remote backup, can guarantee information between the system synchronously and share, thereby recover to provide guarantee for the data of meeting accidental disaster.Obviously, this remote backup system investment that is based upon on the existing system basis is minimum, and operational management is all very economical.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is the communication process schematic diagram of Fig. 1 embodiment.
Embodiment
Embodiment one
The method of setting up power system monitor disaster back-up system of present embodiment as shown in Figure 1, wherein, two covers are connected with subordinate transformer station, strange land computer network management system that can independent operating is respectively existing regional dispatch automation system (EMS system) and newly-built transformer station's centralized control system (SCADA system).Two systems pass through network supervisor (dnet) separately, can realize data sync and shared in native system, and its hardware is by constituting with the lower part:
The advance data collecting unit---receive each subordinate transformer station information in order to real-time collection, and be transferred to front server;
Front server---with advance data collecting unit signal transmitted treatment conversion is to be transported to the native system database server behind the engineering information;
Active and standby two sets of data storehouse servers (following main frame, the standby host of being called for short again)---the engineering information in order to storage native system preprocessor is carried backups each other, and query and search externally is provided;
Work station---in order to native system is operated control;
System switch---connect in order to realize the network between the native system computer, and front server is connected with network between the advance data collecting unit information;
Bridge and router---realize the physical connection of EMS system and SCADA system in order to the conversion of realization photosignal, by optical cable;
Two systems are carried out the initialization (referring to Fig. 2) of following content:
1. read the configuration file of descriptive system connected mode, wherein defined the connected mode of system, notifying program need to which system forwards data, to realize synchronously and to share;
2. read the configuration file of describing the kind that E-Packets, wherein defined message from which sender and will be forwarded in the other system and go, will not be forwarded in the other system from the sender's who in this configuration file, does not define message;
3.socket initialization to operating system application socket, and is done corresponding setting, sets up network path.
Afterwards, main database server is transferred to each computer of native system with changed information, simultaneously after the model data change operation of accepting work station
---as send server,, carry out data communication by the corresponding with service device in router and the other system, the implementation model data synchronization according to following steps:
1), be that purpose sends, the model changed information is formed real-time packet, with the NIC address of other system corresponding with service device at scheduled time slot;
2), after other system corresponding with service device receives, should feed back response message, as not receiving response message in the given time, the local message file of target when then this send server saves as band in chronological order with real-time packet;
2) ', the described database server that is equipped with constantly duplicates local message, and send local message to master server and duplicate the sign that finishes;
3), whether the main database server test exists local message, as existing, whether then detect to be equipped with database server sends local message and duplicates the sign of finishing, as denying, then main database server waits for that this sign arrives, and treats next period, is purpose with the NIC address of other system corresponding server, press the time sequencing that message forms, send local message one by one;
4), after other system corresponding with service device receives, should feed back response message, as not receiving response message pre-in regularly, then this database server suspends and sends, and treats next period, continues to send to go up the local message of bar;
5), in step 3)-4) process in, form new real-time packet as this database server, then it is saved as in chronological order the local message file of when band target;
6), as the test result of step 3) for not existing, then go to step 1);
---as reception server, realize data communication by the corresponding with service device in network router and the other system according to following steps:
1), receive the message that other system corresponding with service device sends after, the feedback response message;
2), according to the model database on the message update service device that receives, and other work stations of broadcast announcement upgrade its this machine real-time data base;
Front server is an engineering information with each subordinate transformer station information translation of gathering in real time under normal circumstances, is transported to the native system database server; Under the situation that the one or more transformer stations of this side system message pick-up interrupts, system will receive the real time information of this transformer station of opposite side system forwards automatically by router, thereby will realize that real time information is standby each other.
Need to prove, the socket communication modes is adopted in above communication, mainly comprises two parts, and one is responsible for sending (transys_send), it two be responsible for to receive (transys_recv), and resides in respectively on the main frame of transmitting system main frame and receiving system (referring to Fig. 2).Mainly contain two lines in the process, one is the transmission of real-time packet, and one is the transmission of the local message of preserving.
In brief, most important transmission principle is to send according to sequential, and promptly message sends to other system in strict accordance with the order that receives, with the consistency that guarantees to upgrade.Its logic is as follows:
1. when sending message, be transmit leg, send according to this, send successfully up to receiving correct response message, then thinking to every NIC address to the main frame of side system with this machine (must be main database server).
2. if because network is obstructed, or mechanical disorder, or the corresponding process of recipient is not activated, or do not receive correct replying, and cause message correctly to send to side system, then message will be preserved with the local file of markers as filename.
3. server constantly sends local message to master server and transmits (the pointing to master server duplicates) sign that finishes fully, to tell master server, the local message that does not have preservation.
4. if there is local message not send as yet, the real-time packet that then receives does not send, and is same local by preserving as filename with markers, sequences to be sent such as adding;
5. do not duplicate the sign of finishing if receive the local message that server is fully sent, master server does not send, and arrives up to this sign.(only be set under " unit " mode, just ignoring and whether receive and send this sign to other system.)
6. the transmission of local message is according to time sequencing, if at first one does not send successfully, then transmission stops, and waits for next time and attempting.
With the relevant language description for preparing a computer program, then the present embodiment particular content is:
A, transmission process main frame are: initialization and major cycle.
A1, initialization mainly comprise:
1, reads the configuration file (connect_system.sys) of descriptive system connected mode.Wherein defined the connected mode of system, with notifying program, need to which system forwards data, to realize synchronously and to share.
2, read the configuration file (transys_reptype.sys) of describing the kind that E-Packets.Wherein having defined message from which sender will be forwarded in the other system and go.Message from undefined sender will not be forwarded in the other system.
3, socket initialization to operating system application socket, and is done corresponding setting, sets up network path.
A2, major cycle have according to the order of carrying out in the circulation:
(1.open_log): open journal file, prepare to write as daily record:;
(2.am_i_host): check whether oneself is main frame;
Whether (3.check_local_report): checking has the message that is kept at this locality to need to send;
4. as being not main frame, then the closing journal file restarts circulation;
Whether (5.dnet_receive_message): checking has new message to arrive; (the message here is meant from the program of open2000 and sends over, and need be forwarded to the packet of other system, and its transmit leg is the intrinsic program of open2000, as modify_table etc.)
6. as there not being new message, then the closing journal file restarts circulation;
(7.get_large_report_buffer): check whether need packaging,, then wait for the arrival of next bag, thereby the closing journal file restarts circulation as needs.This is because when the system data bag is excessive, and therefore the automatic subpackage of meeting need carry out the processing of packaging the recipient.
(8.write_log_sendsock): message received in record in journal file;
9. call fork () and derive from subprocess;
(10.deal_report): in subprocess, handle the message that receives, closing journal file after finishing, and finish subprocess
11. in host process, the closing journal file restarts major cycle.
The program of B, transmission process is mainly
1, open_log opens journal file;
2, am_i_host judges whether oneself is main frame.Three return values are arranged, and return the title of main frame simultaneously:
Status==-1 is not a main frame, and returns the title of main frame;
The current system of status==-2 does not have main frame, and the Hostname that returns is a null character (NUL);
Status==1 is a main frame, and returns the title of oneself.
In this program, called subprogram commonly used a: SelectMyServer, remove to seek main frame by this program.
3, check_local_report checks and preserves local message, and does corresponding processing.It has two to bring parameter into, and status and server_name are respectively the Host Status that obtains after am_i_host calls, and host name.Status is the return value of am_i_host.This program circulates to all systems that define among the connect_system.sys, when be not native system (! Myself) time, then carry out loop body, otherwise circulation again.The work that loop body is finished has:
1) check_local_report_bysystem (): the situation of checking local message by system one by one.The message that need send to this system under this locality all is kept at catalogue with this systematic naming method, is an example with the centralized control system, should be kept to the message that this system sends;
2) whether NotSending (): checking has process to begin to send the local message that need send to this system.Return value is status, if status==1, expression does not have process that this system is being sent local message; If status==0, expression has had process that this system is sent local message;
3) check_send_local_msg (): if preserve the message (local_report_exist==TRUE) that does not send to this system under this system's respective directories, and there is not process this system being sent local message (the return value status==TRUE of NotSending), then carry out fork (), derive a subprocess, be responsible for sending the local message that is kept under the respective directories to this system;
4) else, if promptly this system does not have the message that the local needs of preserving send, and this machine is not main frame (master server), then carry out rcp_fin (), send a sign to master server, promptly copy the .RcpFin empty file, the notice master server, this machine (being equipped with server) needs the message that sends not corresponding to this system.In this section, called ping_server ().Ping_server () checks whether network can reach master server, and at which network segment can reach, and returns the machine name that is defined on this network segment simultaneously, uses when carrying out rcp for the back.
4, dnet_send_message receives message by dnet.Send message to sending the communication process by dnet, transmit to other system by this process.
5, deal_report handles the message that receives.Definition in this program checkout transys_reptype.sys file is determined the system that these message needs are forwarded to according to the sender of this message, and carries out and send (send_to_system), and trial sends to this system with this message.In calling last parameter of send_to_system, be set to 0 here, whether expression is the real-time packet that receives, and sends for the first time, need and have local message not distribute as yet according to network state and decide the transmission behavior.Finish if this locality still has message not send, then this message will not send, and directly be kept at this locality.
6, send_to_system sends message by network to the receiving system of appointment.
1) this system name is transferred to system number;
2) judge whether to be optional transmission.
3) if then judge:
Is there the message that does not distribute this locality? according to satisfying the purpose that sequential sends, if there is the message that does not distribute as yet this locality, then new message must wait for that the message of front sends the transmission again that finishes, and therefore, this message need be preserved in this locality and not send to network;
If that does not receive server fully duplicates the sign that finishes (expression is equipped with server does not have local message to duplicate), then expression is equipped with the message that server may have transmission or not, so this message can not send, and must locally keep in.After local the preservation, program is promptly returned.
4), send send_to_server to this system according to the number of servers in this system.If send successfully, then program returns 1).
5) as sending failure, then:, then return if local message is forced to send; Otherwise, this message is kept under the local respective directories, become local message.
7, save_msg_local is filename with the current time, is suffix with the newspaper code, and message is kept under the catalogue corresponding to the purpose system with binary file format.
8, NotSending checks corresponding to whether " .IsSending " file is arranged under the respective directories of this system, and this document is to set up when having process to be responsible for to send these local messages of preserving, and finishes back (no matter success or not) deletion sending.
9, check_send_local_msg is according to this machine attribute difference (master server still be equipped with server), and different actions is carried out in decision, send local preserve to local message that should system.Program circuit is:
1) in that this locality that should system is preserved under the message catalogue, generates the .IsSending empty file, indicate that the local message of this system is responsible for transmission by " I ".
2), carry out different transmissions according to this machine attribute difference:
For master server (IsHost==1), send_local_report sends message to this system;
For being equipped with server (IsHost==-1), rcp_local_file_to_host, the message that this locality is preserved copies under the master server respective directories, is carried out sending by master server.
3) be sent completely back (no matter whether sending success), delete the .IsSending file under this catalogue, expression sends and finishes.
Distinguishing active/standby server, only allow master server to carry out and send, be equipped with server and do not send, is to carry out in strict accordance with sequential in order to guarantee that message sends.If message can not send according to sequential, then when the recipient carries out corresponding operating, can lead to the failure.
10, this program circuit of send_local_report is as follows:
What 1) detect to be equipped with server duplicates complement mark (RcpNotFin ());
2) if should not indicate, expression is equipped with server replicates not to be finished, and then returns, and does not send.Write down the current time hereof before returning,, then send the warning information (send_warn ()) of " to side system is sent failure " to the alarm window if after 20 seconds, still do not receive this sign.
3), then remove this sign (deletion .RcpFin file), and deletion record had do not receive last time to duplicate and notes the file of time at that time when finishing information if receive this sign.
4) will send (check_send_local_bysystem ()) to network corresponding to the file that is kept under the respective directories of this system
11, RcpNotFin judges whether the copy packet end mark that is equipped with server arrives this machine (master server).Do not arrive, then return 1, expression is not duplicated and is finished; If reached, then return 0, expression is equipped with server has not had message, and master server can begin to send to network.
Receiving process can be arranged according to above transmission process is corresponding, does not give unnecessary details in addition.
Facts have proved, above process makes and can't realize originally that EMS system and SCADA system that data are equipped with mutually realized on the basis of system interconnect in database model integrated design and use router, mode by network message communication between the employing system, not only can be according to jurisdiction and responsibility of maintenance ownership, information sharing realization such as network model maintenance, picture, form are safeguarded, and the real time data that has realized two systems fully is synchronous and shared, thereby reaches the purpose of mutual remote backup.Because above-mentioned remote backup is based upon on original two cover systems fully, therefore to invest minimumly, operational management is very economical.When system moves, neither influence original function, can not cause the storage confusion again, fully excavated the potentiality of power system monitor computer network management system, recover guarantee is provided, be worthy of popularization for the data of meeting accidental disaster.
Claims (8)
1. method of setting up power system monitor disaster back-up system, be connected with subordinate transformer station respectively by at least two covers, can the strange land grid monitoring system of independent operating in, described grid monitoring system comprises:
The advance data collecting unit---receive each subordinate transformer station real time information in order to gather, and be transferred to front server;
Front server---with advance data collecting unit signal transmitted treatment conversion is engineering information, is transported to other work stations in native system database server and the system then;
Database server---the engineering information historical data in order to storage native system data model information and preprocessor are carried provides the query and search service;
Work station---in order to native system is carried out each generic operation;
System switch---connect in order to realize the network between the native system computer, and front server is connected with network between the advance data collecting unit;
It is characterized in that:
Described grid monitoring system also comprises in order to network router interconnected between the realization system and telecommunication network connection device, realizes physical connection by optical cable, bridge and network router between the described at least two cover strange land grid monitoring systems;
Behind the system initialization, when the attendant when work station carries out the electric network model data change, database server is transferred to each computer of native system with changed information, simultaneously after receiving the model data changed information of work station
---as send server,, carry out data communication by the corresponding with service device in router and the other system, the implementation model data synchronization according to following steps;
1), be that purpose sends, the model changed information is formed real-time packet, with other system corresponding with service device at scheduled time slot;
2), after other system corresponding with service device receives, should feed back response message, as not receiving response message in the given time, the local message file of target when then this send server saves as band in chronological order with real-time packet;
3), whether test exist local message file, as existing, then waits for next period, is purpose with the other system corresponding server, press the message formation time in proper order, sends local message one by one;
4), after other system corresponding with service device receives, should feed back response message, as not receiving response message pre-in regularly, then this database server suspends and sends, and treats next period, continues to send to go up the local message of bar;
5), in step 3)-4) process in, form new real-time packet as this database server, then it is saved as in chronological order the local message file of when band target;
6), as the test result of step 3) for not existing, then go to step 1);
---as reception server, realize data communication by the corresponding with service device in network router and the other system according to following steps:
1), receive the message that other system corresponding with service device sends after, the feedback response message;
2), according to the model database on the message update service device that receives, and other work stations of broadcast announcement native system upgrade its this machine real-time data base.
2. according to the described method of setting up power system monitor disaster back-up system of claim 1, it is characterized in that: described front server is an engineering information with each subordinate transformer station information translation of gathering in real time under normal circumstances, is transported to the native system database server; Under the situation that the one or more transformer stations of this side system message pick-up interrupts, will receive this transformer station's real time information of opposite side system forwards automatically by network router, thereby realize that real time information is standby each other.
3. according to the described method of setting up power system monitor disaster back-up system of claim 2, it is characterized in that: described database server comprises active and standby two covers, and the engineering information in order to storage native system preprocessor is carried backups each other, and query and search externally is provided;
Main database server in order to step as send server in:
---described step 2) and 3) between also comprise step 2) ', the described database server that is equipped with constantly duplicates local message, and sends local message to master server and duplicate the sign that finishes;
---whether the main database server test exists local message in the described step 3), as existing, whether then detect to be equipped with database server sends local message and duplicates the sign of finishing, as denying, then main database server waits for that this sign arrives, and treats next period, is purpose with the NIC address of other system corresponding server, press the time sequencing that message forms, send local message one by one.
4. according to the described method of setting up power system monitor disaster back-up system of claim 3, it is characterized in that: the initialization of described system comprises:
1) reads the configuration file of descriptive system connected mode;
2) read the configuration file of describing the kind that E-Packets;
3) to operating system application socket, and do corresponding setting, set up network path.
5. according to claim 2 or the 3 described methods of setting up power system monitor disaster back-up system, it is characterized in that: the real time information that the collection of described advance data collecting unit receives each subordinate transformer station comprises voltage, electric current, meritorious, idle value and switch tool state.
6. according to claim 2 or the 3 described methods of setting up power system monitor disaster back-up system, it is characterized in that: described work station carries out each generic operation to native system and comprises the electric network model data change.
7. according to claim 2 or the 3 described methods of setting up power system monitor disaster back-up system, it is characterized in that: described database server forms real-time packet as send server with the model changed information, when scheduled time slot sends, be purpose with the NIC address of other system corresponding with service device;
8. according to the described method of setting up power system monitor disaster back-up system of claim 7, it is characterized in that: described database server forms real-time packet as send server with the model changed information, when scheduled time slot sends, send according to this to every NIC address of other system respective hosts.
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| CN102098174A (en) * | 2010-12-29 | 2011-06-15 | 广东电网公司电力科学研究院 | Safety communication method and system for power grid monitoring system |
| CN102163877A (en) * | 2011-03-09 | 2011-08-24 | 国电南瑞科技股份有限公司 | Power grid model distribution maintaining and instantly synchronizing method based on segment identification |
| CN102413154A (en) * | 2010-09-21 | 2012-04-11 | 北大方正集团有限公司 | Method of data information synchronization between systems and apparatus thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1120555C (en) * | 1995-02-25 | 2003-09-03 | 国电自动化研究院 | On-line decision-premaking adaptive stabilizing protection system |
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| CN1264022C (en) * | 2003-05-22 | 2006-07-12 | 华立集团有限公司 | Failure analysis monitoring method and system device used on power supply network |
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2004
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