CN110544985A - Network source coordination data communication system - Google Patents

Network source coordination data communication system Download PDF

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Publication number
CN110544985A
CN110544985A CN201910837676.9A CN201910837676A CN110544985A CN 110544985 A CN110544985 A CN 110544985A CN 201910837676 A CN201910837676 A CN 201910837676A CN 110544985 A CN110544985 A CN 110544985A
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China
Prior art keywords
data
master station
substation
communication
network source
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CN201910837676.9A
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Chinese (zh)
Inventor
李剑锋
鲁鹏
王鑫明
杨春来
冯旭阳
郝晓光
殷喆
马瑞
侯倩
袁成成
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd
State Grid Hebei Energy Technology Service Co Ltd
Original Assignee
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd
State Grid Hebei Energy Technology Service Co Ltd
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Application filed by State Grid Corp of China SGCC, Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd, State Grid Hebei Energy Technology Service Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201910837676.9A priority Critical patent/CN110544985A/en
Publication of CN110544985A publication Critical patent/CN110544985A/en
Pending legal-status Critical Current

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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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • 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
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/16Electric power substations

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  • Supply And Distribution Of Alternating Current (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The invention relates to a network source coordination data communication system which comprises a power supply side substation, a communication server and a scheduling side master station which are sequentially connected, wherein the power supply side substation, the communication server and the scheduling side master station carry out data interaction through a communication protocol. The invention provides a reasonable and standard universal network source coordination data communication system with high transmission speed, high transmission efficiency and good real-time performance, which provides assistance for the construction of a network source coordination platform and guarantees the stable and efficient operation of a power grid.

Description

Network source coordination data communication system
Technical Field
The invention belongs to the technical field of electronic information, and particularly relates to a network source coordination data communication system.
Background
The network source coordination management refers to the management work of functions, performances, parameters and tests of a synchronous generator excitation system, a Power System Stabilizer (PSS), a speed regulation system, a network-related relay protection and safety automatic device, an automatic generation control system (AGC), an automatic voltage control system (AVC) and other factory-used network-related equipment.
the network source coordination management is suitable for thermal power, gas and nuclear power generating units with the capacity of a single machine connected to a power grid being more than 100MW level, hydroelectric generating units with the capacity of 50MW and more, and other generating units connected to the voltage level of 220KV and more. Thermal power and gas generating units below 100MW and hydroelectric generating units below 50MW can be executed by reference.
The effective development of the network source coordination management work needs to be carried out by relying on an efficient and stable network source coordination management platform.
A data communication system refers to a system that connects data terminal devices distributed at remote places with a computer system through data circuits to realize data transmission, exchange, storage, and processing.
The data communication system is mainly composed of a central computer system, data terminal equipment and a data circuit.
1. The central computer system: the system consists of a communication controller (or a front processor), a host computer and peripheral equipment thereof, and has the functions of processing data information input from data terminal equipment and outputting a processing result to corresponding data terminal equipment.
2. A data terminal device: consists of a data input device (a data source that generates data), a data output device (a data sink that receives data), and a transfer controller.
3. A data circuit: consisting of a transmission channel (transmission line) and data circuit terminating equipment at both ends thereof. The transmission channel may be a dedicated channel or a switched channel, and may also be an analog channel or a digital channel.
In recent years, the electric power construction in China is continuously accelerated, the electric power production and transaction scale is rapidly enlarged, the links of power grids in various provinces are increasingly compact along with the implementation of the extra-high voltage construction of five transverse and five longitudinal modes and the power networking project of three Hua, and the operation characteristics of the power grids are increasingly complex. Network source coordination problems such as whole network frequency and unstable voltage brought by a complex power network structure are gradually highlighted. The method aims to solve the problem of network source coordination, and particularly meets the requirement of constructing a network source coordination management platform with rapid and accurate information perception on the network side and the source side and complete calculation and analysis functions.
The core of the network source coordination system is used for data sensing and data communication at the network side and the source side. The electric power regulation and control center of each power grid company collects real-time operation data of each power plant to check and evaluate AGC and primary frequency modulation indexes of each unit, predicts peak regulation capacity of the unit of the power plant, and realizes the functions of unit state sensing, grading evaluation and the like, and the realization is based on a well-operated network source coordination data communication system.
Most of the existing network source coordination management platforms have the problems of unreasonable and non-standard communication modes, low data transmission speed, low efficiency, poor data real-time performance and the like, so that the specific application modules involved in the various network source coordination management work cannot be effectively realized.
Disclosure of Invention
The invention aims to provide a reasonable and standard universal network source coordination data communication system with high transmission speed, high transmission efficiency and good real-time performance, which provides assistance for the construction of a network source coordination platform and guarantees the stable and efficient operation of a power grid.
the invention adopts the following technical scheme:
A network source coordination data communication system comprises a power supply side substation, a communication server and a scheduling side master station which are sequentially connected, wherein the power supply side substation, the communication server and the scheduling side master station carry out data interaction through a communication protocol.
Further, the power supply side substation collects real-time operation data of a distributed Control System DCS (distributed Control System) of the generator set or an original plant monitoring Information System SIS (Supervisory Information System) of the generator set at a frequency of once per second and sends the data to the master station at the dispatching side through a communication server according to formulated protocols.
Further, the communication protocol comprises MODBUS, OPC, IEC61850, IEC103 and IEC104 communication protocols.
Furthermore, the power supply side substation collects all switching value and analog value data of the DCS or the SIS once per second through a communication protocol (such as MODBUS, OPC and IEC 104) matched with the DCS or the SIS, and forms a complete data mirror image of the DCS or the SIS for the main station at the dispatching side to inquire data.
Furthermore, a power system network unidirectional isolation device is arranged between the power supply side substation and the DCS, so that the safety of power production is ensured.
Furthermore, the power supply side substation is provided with a perfect power supply side substation database for storing various collected data and related information. The information storage contents of the switching value, the analog quantity and the like in the power supply side substation database are mainly a power plant identification system (KKS), a roll call, a current value, a timestamp and the like. The design capacity of the storage space is not less than 1T, and the complete data can be stored for at least 15 days; when the storage space is insufficient, the data of more than 15 days can be automatically overwritten by the new data.
Furthermore, the power supply side substation has certain edge computing capability, can call data in the substation database according to actual application requirements for edge computing analysis, and presents the computing analysis result through the interface computer.
Further, the communication server carries out data modeling on data points collected by the power supply side substation, and uploads the model point table to the scheduling side master station in a 104+ wave recording mode according to the application requirement of the scheduling side master station.
Further, the communication server has multi-protocol communication capability including IEC61850, IEC103 and IEC 104.
Furthermore, the scheduling side master station receives the unit operation data transmitted by the power supply side slave station and stores the data in the scheduling side master station database; the dispatching side master station comprises a power system primary frequency modulation prediction diagnosis, AGC evaluation maintenance and unit peak regulation capacity online evaluation function module, and data in a dispatching side master station database is called according to actual requirements to carry out system analysis evaluation.
Furthermore, the scheduling side master station database is a mySQL/Oracle database.
Preferably, the data transmission between the power supply side substation and the DCS uses MODBUS, OPC or IEC104 protocols according to the actual protocol support condition of the generator set DCS; the data transmission between the communication server and the power supply side substation uses an IEC61850 communication protocol; and the data transmission between the master station at the scheduling side and the communication server adopts an IEC104+ wave recording mode.
The invention has the beneficial effects that: the network source coordination data communication system solves the problems that a network source coordination management platform is unreasonable and non-standard in communication mode, low in data transmission speed, low in efficiency, poor in data real-time performance and the like.
1. The frequency of data acquisition from the generator set DCS by the power supply side substation is once per second, the data transmission precision is high, and the data requirement of application with high data precision requirement can be met.
2. Because all data mirrors of the generator set DCS are made in the substation, the invention can be used as the data safety backup of the generator set. When a unit DCS historical database fails, complete historical data recall and look-up functions can be provided at any time.
3. Because all data mirrors of the generator set DCS are made in the substation, the realization of the application of the power supply side data to the substation side (for example, the application of the generator set fault early warning, peak regulation capability prediction and the like) can be realized. The partial application of the method to the substation can effectively reduce the network data transmission pressure, reduce the network bandwidth utilization rate and improve the data transmission stability.
4. The IEC61850 protocol used by the communication server for data communication with the substation is an object-oriented modeling communication protocol. The method adopts an object modeling technology, equipment-oriented modeling, a configuration language, technologies of data source determination, data attribute transmission, sampling measurement value transmission and the like, and can save a great deal of time and energy in configuration, configuration and maintenance.
5. The physical communication channel between the master station at the dispatching side and the communication server can use the existing power dispatching data network, and the construction of network equipment and the channel is not needed, so that a great amount of expenses can be saved.
Drawings
FIG. 1 is a system block diagram of the present invention.
FIG. 2 is a diagram of a data collection structure of a substation.
Fig. 3 is a diagram illustrating data communication between a master and a slave station according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. 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 application.
As shown in fig. 1 to 3, a network source coordination data communication system includes a power supply side sub-station, a communication server, and a scheduling side master station, which are connected in sequence, and the power supply side sub-station, the communication server, and the scheduling side master station communicate with each other through a communication protocol.
The power supply side substation collects real-time operation data of a distributed Control System DCS (distributed Control System) or an original plant level monitoring Information System SIS (Supervisory Information System) of the generator set and sends the data to the dispatching side main station through a communication server according to a proposed protocol.
The distributed control system DCS of the generator set is a computer control system which is based on a microprocessor and a satellite computer and integrates a computer technology, a data communication technology, a CRT screen display technology and an automatic control technology into a whole. The centralized control system is used for centralized operation management and decentralized control of the production process, namely, process control stations which are distributed in each part of the production process and take a microprocessor as a core respectively control the process flow of each part, and are networked with each monitoring operation station of a central control room through a data communication system, so the centralized control system is also called as a centralized control system. The operator can monitor and operate the working conditions of all production processes through the CRT terminal of the monitoring station, and the professional computer in the network is used for the operation of a mathematical model or a cash control strategy and sending control information to each process station in time and adjusting the operation working conditions.
A decentralized control system, which may be a hierarchical system, typically divided into a process level, a supervisory level and a supervisory level, consists of various workstations with autonomous functions, such as data acquisition stations, process control stations, engineer (operator) operator stations, etc. The workstations can independently or cooperatively complete the functions of data acquisition and processing, control, calculation and the like, and are convenient for realizing the dispersion of functions, geographic positions and loads. And when the individual workstation breaks down, the system function is only slightly reduced, and the operation of the whole system is not influenced.
The various types of distributed control systems are basically the same in structure and are composed of two parts, namely a communication network and a workstation (node), and the distributed control systems can form a Data Acquisition System (DAS), an Automatic Control System (ACS), a Sequence Control System (SCS), safety protection and the like of a power plant unit set to realize computer process control.
The main advantages of realizing automation of the large-scale thermal power generating unit by using the DCS are as follows:
1) The functions of continuous control, logic control, monitoring and the like are centralized in a unified system, comprehensive control can be realized by hardware with few varieties by means of abundant software and communication functions, investment is saved, and the reliability, operability and maintainability of the system are improved.
2) The control system can be formed by various workstations with different functions and geographic positions according to the requirements of the process, the control function and the reliability, the system structure is flexible, and cables are greatly saved.
3) The fault of one station can not affect the normal operation of other stations, and the system reliability is high.
4) Various monitoring control functions are completed by adopting software modules, so that the modification is convenient, and the high-level control is easy to realize.
The plant-level monitoring information system SIS is a plant-level automatic information system integrating real-time process monitoring, optimal control and production process management, and is a set of real-time plant-level monitoring information system between a distributed control system of a thermal power plant and a related auxiliary program control system and a whole plant management information system.
The SIS system mainly aims at performance calculation of the unit, plant-level economic analysis, plant-level load distribution and economic operation of the unit. The SIS system is a system for analyzing the operation parameters of the unit in real time and accurately analyzing, diagnosing and optimizing the operation conditions of the unit and even the whole plant through the powerful functions of data mining, data processing and optimizing of the system.
The communication protocol comprises MODBUS, OPC, IEC61850, IEC103 and IEC104 communication protocols. The data transmission between the power supply side substation and the DCS uses MODBUS, OPC or IEC104 protocols according to the actual protocol support condition of the generator set DCS; the data transmission between the communication server and the power supply side substation uses an IEC61850 communication protocol; and the data transmission between the master station at the scheduling side and the communication server adopts an IEC104+ wave recording mode.
The IEC61850 communication standard is the prior art and is the only global universal standard in the field of power system automation. The standardization of engineering operation of the intelligent substation is realized through standard realization. The engineering implementation of the intelligent substation becomes standard, uniform and transparent. No matter which system integrator establishes the intelligent substation project, the structure and layout of the whole substation can be known through an SCD (system configuration) file, and the method has an irreplaceable effect on the development of the intelligent substation.
The invention transplants the idea of the operation standardization of the transformer substation into the data communication of the generator set, carries out the universal modeling on all the switching value and analog value data, and calls the related data for operation in a configuration file mode.
The power supply side substation collects all switching value and analog value data of the DCS or the SIS once per second through a communication protocol (such as MODBUS, OPC and IEC 104) which is suitable for the DCS or the SIS, and forms a data mirror image of the DCS or the SIS for the main station at the dispatching side to inquire data.
And a power system network unidirectional isolation device is arranged between the power supply side substation and the DCS. The device only allows data to be transmitted from the DCS to the power supply side substation, blocks the data from being transmitted from the safety second area to the safety first area to influence the operation of the control system, and guarantees the safety of power production.
And the power supply side substation is provided with a perfect power supply side substation database for storing various collected data and related information. The information storage contents of the switching value, the analog quantity and the like in the power supply side substation database are mainly a power plant identification system (KKS), a roll call, a current value, a timestamp and the like. The design capacity of the storage space is not less than 1T, and the complete data can be stored for at least 15 days; when the storage space is insufficient, the data of more than 15 days can be automatically overwritten by the new data.
The power source side substation database is shown in table 1.
Table 1 substation database structure table
More specifically, the power supply side substation is an industrial server with multiple network ports. The minimum configuration requirements are 6 cores, 6 threads of CPU, 16G memory and 2 x 2T enterprise-level hard disk. And the power supply side substation is connected with the DCS communication interface of the generator set and the communication server through network connecting wires respectively.
And the communication server carries out data modeling on the data acquired by the power supply side substation, and uploads the model point table to the scheduling side master station in a 104+ wave recording mode according to the application requirement of the scheduling side master station.
The communication server has multi-protocol communication capability including IEC61850, IEC103 and IEC 104.
More specifically, the communication server is an industrial server with multiple network ports. The minimum configuration requirements are 4 cores, 8 threads of CPU, 16G memory and 1T enterprise-level hard disk.
And the communication server is respectively connected with the power supply side substation and the dispatching side main station through a network connecting line and a power dispatching network. The communication server has data inquiry and data forwarding functions.
The scheduling side master station receives unit operation data sent by the power supply side slave station and stores the data in the scheduling side master station database; the dispatching side master station comprises a power system primary frequency modulation prediction diagnosis, AGC evaluation maintenance and unit peak regulation capacity online evaluation function module, and data in a dispatching side master station database is called according to actual requirements to carry out system analysis evaluation. The scheduling side main station database is mySQL/Oracle database, and the database structure table is shown in table 2.
Table 2 master station database structure table
More specifically, the master station on the scheduling side is a front-end server and is configured in a power regulation and control center D5000 machine room. The minimum configuration requirements are 8 cores, 8 threads of CPU, 16G memory and 2 x 2T enterprise-level hard disk. The master station at the dispatching side is provided with a database covering all the operation data of the generator set, and has advanced application functions of primary frequency modulation prediction diagnosis, AGC evaluation and maintenance, online evaluation of peak-shaving capacity of the generator set and the like.
In the description above, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited by the specific embodiments disclosed below.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

Claims (10)

1. The network source coordination data communication system is characterized by comprising a power supply side substation, a communication server and a scheduling side master station which are sequentially connected, wherein the power supply side substation, the communication server and the scheduling side master station are used for carrying out data communication through a communication protocol.
2. The network source coordination data communication system of claim 1, wherein said power source side substation collects real-time operation data of generator set distributed control system DCS or supervisory information system SIS and transmits the data to said scheduling side master station through a communication server according to a proposed communication protocol.
3. The network source coordination data communication system according to claim 2, wherein said communication protocol includes MODBUS, OPC, IEC61850, IEC103, IEC104 communication protocol.
4. The system according to claim 3, wherein the power-side substation collects all switching value and analog value data of the DCS or SIS once per second through a communication protocol compatible with the DCS or SIS, and forms a complete data mirror image of the DCS or SIS for the scheduling-side master station to query data.
5. The network source coordination data communication system according to claim 2, wherein a power system network unidirectional isolation device is configured between said power source side substation and said DCS.
6. The network source coordination data communication system according to claim 2, wherein the storage space design capacity of the power supply side substation is not less than 1T, and the power supply side substation can store at least 15 days of complete generator set operation data; when the storage space is insufficient, the data of more than 15 days can be automatically overwritten by the new data.
7. The network source coordination data communication system according to claim 1, wherein the communication server performs data modeling on data points sent by the power supply side substation, and uploads a model point table to the scheduling side master station in an IEC104+ wave recording manner according to application requirements of the scheduling side master station.
8. The system according to claim 7, wherein said communication server has a multi-protocol communication capability including IEC61850, IEC103, IEC 104.
9. The network source coordination data communication system according to claim 1, wherein said scheduling side master station receives unit operation data transmitted from the power side slave station and stores the data in the scheduling side master station database; the dispatching side master station comprises a power system primary frequency modulation prediction diagnosis, AGC evaluation maintenance and unit peak regulation capacity online evaluation function module, and calls data in a dispatching side master station database according to actual demands to calculate so as to complete system analysis evaluation.
10. The system according to claim 9, wherein the database of the master station on the dispatching side is mySQL/Oracle database.
CN201910837676.9A 2019-09-05 2019-09-05 Network source coordination data communication system Pending CN110544985A (en)

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CN111105208A (en) * 2019-12-16 2020-05-05 国网河北省电力有限公司电力科学研究院 Data communication method for source side power plant control logic
CN111105208B (en) * 2019-12-16 2023-10-24 国网河北省电力有限公司电力科学研究院 Data communication method for source side power plant control logic
CN112541696A (en) * 2020-12-21 2021-03-23 国网北京市电力公司 Assessment system and remote assessment method based on assessment system

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Application publication date: 20191206