CN101188599B - Implementation method for load balance design of electric monitoring front system of power plant - Google Patents
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Abstract
The invention relates to a method of electric power communication in an electric power system, and discloses a realization method of the load balancing design of a front-end communication system. The front-end system in the method is composed of a plurality of front-end machines (4), each front-end machine receives and sends data through a plurality of channels (2), each RTU (data source) (1) is connected with the corresponding channel through a path (3), and a line of data flow is formed. Every two front-end machines realizes the functions of synchronizing RTU, path and channel states, maintaining a dynamic parameter area and a static parameter area, and controlling the data processing of the channels, and mutually coordinating active-standby switching through respective control centers. The division of the front-end system can easily realize the combination of a great variety of operating modes, realize the data dispersion gathering, and also realize multi-machine hot standby and multi-channel hot standby. The adoption of the load balancing method can balance the system load, improve the parallel processing capability and the load capacity, and the reliability and the stability of the front-end system is improved.
Description
Technical field
The invention belongs to the electric power system automation field, be applied in the power plant electricity automation control system (FECS), this method is used in the communication front end processor, is a kind of implementation method of deal with data load balancing.
Technical background
Data, services always is the soul of supervisory control system, plays the effect of bridge and hinge in system.Front-end system is exactly a CSPA2000-V1 system data server in the distributed electric main station system of CSPA2000-V1 (FECS " GPA system " main website of system part), is the hinge between supervisory control system and the data source and the core of deal with data.
Interface mode between front-end system and the data source is varied: Ethernet; Serial ports 232,485; Bus networks such as Profibus-DP, CAN-BUS, Lonwork; GPRS wireless network etc.
The stipulations mode that adopts between front-end system and the data source is also varied, and existing pure question and answer also have in the active and send mode, also have in the active and send the mode that combines with question and answer.Such as: IEC608-70-5-101 (DL/T 634.5101), IEC608-70-5-104 (DL/T 634.5104), CDT stipulations promulgated by the ministries or commissions of the Central Government, DNP, MODBUS/TCP etc.
Front-end system is supported various data types, supports electric power system four distant data, protection information, document flow, Media Stream etc.
Preposition hinge as supervisory control system, preposition stability, reliability, accuracy, real-time are the essential requirements of supervisory control system.Protect Automation Co., Ltd as walking to continue in the four directions in China scientific and technical innovation prostatitis, from the actual demand of ECS system of China power plant, invent a kind of front-end system based on RTU load balancing pattern that can adapt to the power-plant operation needs with own intellectual property.
Realize the key of load balancing pattern front-end system: can realize preposition many collections group operation; Can the realization task shunt in the group; Realize multichannel standby mutually (polymorphic type channel standby); Front-end system operational mode configurable (read thread, write thread, the flexible configuration of explanation thread, and the flexible selection of poll and Event triggered mode)
Summary of the invention
The invention provides a kind of implementation method of preposition communication system load balancing design, this method comprises: data source is divided into some collection groups, the collection group that each front-end system is corresponding different, described front-end system comprises some front end processors, every front end processor carries out mutual backup and task shunting, the front-end system data source can be distributed to and carry out parallel processing in several front end processors, each front end processor can back up again mutually simultaneously; Every front end processor receives by some passages and the transmission data, and each data source links to each other with corresponding passage by the path, the composition data Flow Line; Described each front end processor also has control centre separately, it is characterized in that: from described data source can by a plurality of described passages with transfer of data to described front-end system; Described path is meant a data flow pointing to a certain passage from described data source, and each data source can dispose a plurality of paths to a passage, and each path can the configuration preference rank, realizes that multichannel is equipped with mutually, the polytype passage is equipped with mutually; Data are distributed in operation in many described front end processors; Described data source is connected on the passage that needs by different paths, and is connected to different front end processors by many passages as required, disposes the operational mode of front-end system flexibly according to described data source type and data traffic.
The present invention also comprises the following aspects:
(1) many collections of front-end system group operation
Each front-end system belongs to different collection groups, the device that articulates below in large-scale supervisory control system has thousands of, tens thousand of of measuring point, very big of single front-end system pressure this moment, can adopt the mode of different collection groups, data source is divided into some groups gathers and handle, the equalizing system load improves parallel processing capability and load capacity.
(2) many preposition operations in the collection group
A collection group inside several front end processor operations can be arranged, every front end processor carries out mutual backup and task shunting, the front-end system data source can be distributed to and carry out parallel processing in several front end processors, each front end processor can play the effect of mutual backup again simultaneously.
(3) based on active and standby mechanism and the data mechanism of RTU
In the system with all RTU, FTU, imitation screen, substation, single assembly, but repeater system etc. all treat as equal communication equipment, in the communication protocol as long as can unique definite measuring point, can be abstract be RTU.RTU is abstract in system to be basic communication data source.Data flow in the front-end system without exception with RTU be starting point by the path to radiation everywhere.
(4) introduce the path notion
The notion of introduction of path, path are meant that (the data source) is pointed to a data flow of a certain passage from RTU.Each RTU can dispose a plurality of paths (each path can configuration preference rank) to passage, realizes that multichannel is equipped with mutually, the polytype passage is equipped with mutually.
(5) operational mode of flexible configuration system
The operational mode of front-end system can flexible configuration, carries out the selection of operational mode according to different data source types and data volume, so that better support various application scenarios.System adopts multithreading, and the number of threads flexible configuration is read thread, writes thread, explained the thread flexible configuration, but reads thread to explanation thread Event triggered and Timing Processing, but to writing thread Event triggered and Timing Processing.
In specific implementation (2) (3) (4) (5), this implementation method also comprises:
Share memory technology (static parameter district, dynamic data area), the instrument that is used to provide to each front-end system uses;
Description of drawings
Fig. 1 is pre-process data type figure
Fig. 2 is a front-end system collection group structure chart
Fig. 3 is a front-end system passage load balancing schematic diagram
Fig. 4 is front-end system routing decision and synchronizing information schematic diagram
Fig. 5 is preposition thread operational mode figure
Embodiment
The buzzword of using among the application:
FEP:front-end processor front end processor
Passage: the tunnel (can be virtual) that refers to provide carrier for data flow
RTU: be meant the communication manager or the control appliance that are connected in passage, also can be substation system
ROUTE: the path of each RTU institute interface channel.
RTDB: real-time data base
Fig. 1 has illustrated the data type that can handle in the front end processor, and front end processor can be handled document flow, Media Stream and protection information flow; Can handle 4 distant data of electric power system, remote measurement, remote signalling, distant arteries and veins, remote control according to electric power system data type branch.
Fig. 2 has illustrated the structure chart of preposition differentiation collection group.In the application of power plant,, therefore all data are divided into n collection group (Groupl---Groupn) because data volume is very big, and real-time requires than higher; Configurable 4 front end processors at most in every group, these 4 front end processors are shared the load (concrete see schematic diagram 3) of this collection group institute image data, and these 4 front end processors also have the effect of backup mutually simultaneously.
Front-end system collection group structure chart with reference to Fig. 2.
In power plant system, the power plant house-service equipment often has thousands of, so pressure communication is bigger, can adopt the mode of different collection groups this moment, data source is divided into some groups gathers and handle, the equalizing system load improves parallel processing capability and load capacity.As seen from the figure, prepositionly can be divided into some collection groups, several front end processors (design at present can 1 to 4 front end processor standby mutually) can be arranged in the collection group.Enter real-time data base after all data processing.
Fig. 3 has illustrated the principle of each front end processor load balancing in the communication acquisition group inside, 6 RTU (data source) have been distributed to and have gone processing in 3 front end processors as can be seen from schematic diagram, each front end processor plays the effect of mutual backup again simultaneously, improve concurrency, real-time and reliability that system data is handled, alleviated the data load of every front end processor effectively.
Front-end system passage load balancing schematic diagram with reference to Fig. 3.
Simplified the channel standby mode among the figure, generally each all has three passages of RTU in preposition, in order to say something more clearly, adopts a passage that has only RTU in preposition among this figure
Configuration is as follows among the figure:
FEP1
RTU1 → path 11 → passage 11
RTU2 → path 21 → passage 21
RTU3 → path 31 → passage 31
RTU4 → path 41 → passage 41
RTU5 → path 51 → passage 51
RTU6 → path 61 → passage 61
FEP2
RTU1 → path 12 → passage 12
RTU2 → path 22 → passage 22
RTU3 → path 32 → passage 32
RTU4 → path 42 → passage 42
RTU5 → path 52 → passage 52
RTU6 → path 62 → passage 62
FEP3
RTU1 → path 13 → passage 13
RTU2 → path 23 → passage 23
RTU3 → path 33 → passage 33
RTU4 → path 43 → passage 43
RTU5 → path 53 → passage 53
RTU6 → path 63 → passage 63
Thus in conjunction with among the figure as can be seen, 6 RTU can be by the different passages of different 3 front end processors of path point.
Fig. 4 has illustrated the processing of front-end system routing decision and synchronizing information, and each front end processor synchronizing channel and RTU state in each collection group are to offer the routing decision module in the front end processor.
Fig. 5 has illustrated thread service chart in the front end processor.The operational mode of front-end system can be configured according to the different application environment.Passage reads thread, write thread and explain that the number of thread can join, and triggers, triggers, reads thread and can join to the triggering of explanation thread events to writing thread events to reading thread events, also can adopt timing mode.
Preposition thread operational mode figure with reference to Fig. 5.
The operational mode of front-end system can be configured according to the different application environment.Passage reads thread, write thread and explain that the number of thread can join, and triggers, triggers, reads thread and can join to the triggering of explanation thread events to writing thread events to reading thread events, also can adopt timing mode.
Claims (5)
1. the implementation method of the balanced design of a power plant electricity monitoring front system loading, this method comprises:
Data source is divided into some collection groups, each front-end system is corresponding to different collection groups, described front-end system comprises some front end processors, every front end processor carries out mutual backup and task shunting, the front-end system data source can be distributed to and carry out parallel processing in several front end processors, each front end processor can back up again mutually simultaneously; Every front end processor receives by some passages and the transmission data, and each data source links to each other with corresponding passage by the path, the composition data Flow Line; Described each front end processor also has control centre separately, it is characterized in that:
From described data source can by a plurality of described passages with transfer of data to described front-end system;
Described path is meant a data flow pointing to a certain passage from described data source, and each data source can dispose a plurality of paths to a passage, and each path can the configuration preference rank, realizes that multichannel backs up mutually, the polytype passage backs up mutually;
Data are distributed in operation in many described front end processors; Described data source is connected on the passage that needs by different paths, and is connected to different front end processors by many passages as required, disposes the operational mode of front-end system neatly according to data source type and data traffic.
2. the method for claim 1, the type of described passage has multiple: Ethernet; Serial ports 232, serial ports 485; Profibus-DP, CAN-BUS, Lonwork bus network; The GPRS wireless network; Passage can be bound multiple stipulations: IEC608-70-5-101, IEC608-70-5-104, CDT stipulations promulgated by the ministries or commissions of the Central Government, DNP, MODBUS/TCP.
3. the method for claim 1, described front-end system can single channel, the data of binary channels, the same data source of multichannel transmitting-receiving, when binary channels or multichannel backup, the Linktype of passage can be different, and front-end system can be provided with the operation passage by the priority of path configurations.
4. the method for claim 1, the operational mode of described front-end system can dispose flexibly according to situation about using, front end processor quantity, number of channels, number of paths in configuration collection group quantity, each collection group; Dispose and read thread in the described front end processor, write thread, explain thread selectively, configuration is read thread, writes thread, is explained the processing mode of thread selectively.
5. the method for claim 1 also comprises the steps:
Each described passage receives buffering area dynamic creation and the dynamic recovery information of sending independently;
Share the data of static parameter district and dynamic data area, use with the instrument that is used to provide to each front-end system;
Adopt the stipulations of internal system and communication mechanism to realize data sync between described front end processor, realize data source, path and passage running status synchronously, and SOE when switching, change the data sync of remote signalling, protection incident.
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| CN109753355A (en) * | 2018-12-06 | 2019-05-14 | 积成电子股份有限公司 | The method that adaptive load balancing is realized in the connection of intelligent management unit multichannel |
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