CN112578738A - Network source coordination network-related parameter variable distributed acquisition and centralized transmission device - Google Patents

Network source coordination network-related parameter variable distributed acquisition and centralized transmission device Download PDF

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Publication number
CN112578738A
CN112578738A CN201910932649.XA CN201910932649A CN112578738A CN 112578738 A CN112578738 A CN 112578738A CN 201910932649 A CN201910932649 A CN 201910932649A CN 112578738 A CN112578738 A CN 112578738A
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China
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acquisition
network
data
transmission device
unit
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CN201910932649.XA
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Chinese (zh)
Inventor
牟伟
王管建
吴龙
韩兵
施一峰
葛腾飞
石祥建
刘为群
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NR Electric Co Ltd
NR Engineering Co Ltd
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NR Electric Co Ltd
NR Engineering Co Ltd
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00Programme-control systems
    • G05B19/02Programme-control systems electric
    • G05B19/418Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
    • G05B19/4185Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM] characterised by the network communication
    • 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
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The invention discloses a network source coordination network-related parameter distributed acquisition and centralized transmission device, which comprises a communication host and a plurality of acquisition units, wherein a master-slave structure is adopted; the collecting unit collects generator set excitation system information and speed regulating system information and uploads the information to the communication host; the communication host computer collects, calculates and analyzes the edge of the information sent by the acquisition unit, and sends the result to realize the centralized collection and processing of the acquired data. The device can acquire real-time dynamic data, running states, networking parameter fixed values and the like of a unit excitation system and a speed regulation system, realizes continuous monitoring of a generator control system, provides effective technical conditions for fault prevention and system analysis, and provides data source support for advanced applications of a scheduling master station and a power plant monitoring background.

Description

Network source coordination network-related parameter variable distributed acquisition and centralized transmission device
Technical Field
The invention belongs to the technical field of electrical engineering, relates to a network source coordination online monitoring technology, and particularly relates to a network source coordination network-related parameter distributed acquisition and centralized transmission device.
Background
The generator excitation system and the speed regulating system are important regulating equipment for stable operation of a power grid, and the generator set is guaranteed to provide stable, quick and economical electric energy for the power grid. The speed regulation system and the excitation system are important network-related devices and are important objects for network source coordination management. The method has the advantages that the mathematical models and the characteristic parameters of the excitation system and the speed regulation system of each grid-connected unit are accurately mastered, and the real-time monitoring of the running states of the excitation system and the speed regulation system is an important component of network source coordination management and is one of basic works of strong construction and intelligent power grid. However, at present, the management of the power grid on the generator excitation system and the speed regulation system is mainly achieved through grid-related tests and technical supervision means, the dynamic response characteristics of the excitation system and the speed regulation system are mainly obtained through off-line calculation and field tests, means and techniques of continuous monitoring, on-line checking and on-line evaluation are lacked, and the real-time performance of power grid fault prevention and fault response is affected, so that the real-time management of the generator set excitation system and the speed regulation system parameter and the on-line judgment of dynamic response are imperative.
In the present disclosure, CN105823985A, "a WAMS dynamic data based on-line monitoring and evaluating system for generator excitation system" discloses an existing wide area measurement system WAMS based on-line monitoring and evaluating system for generator excitation system, which focuses on the innovation of application software function, but does not relate to a collection and transmission device at the power plant side. Patent CN108051744A "an excitation collecting device for generator on-line monitoring system" discloses an excitation collecting device, which describes the a/D sampling and relay opening principle inside the device, but does not relate to the excitation on-line monitoring system architecture and network source coordination function. Patent CN108132660A "a speed-regulating collection device for generator on-line monitoring system" discloses a speed-regulating collection device, which focuses on the description of the internal structure of a single collection device, and the on-line monitoring system is not elaborated. Patent CN106771852A unified acquisition and analysis processing method for network source online monitoring data discloses a network source coordination data acquisition and analysis method, which describes the requirements of substation acquisition and master station analysis functions, but does not relate to the architecture of the device at the side of the power plant, the acquisition interface and the acquisition of network-related parameters.
In addition, due to the reasons of different unit control modes, different product interfaces and the like, the acquisition modes of the parameters of the generator set excitation system and the speed regulation system are diversified. The existing acquisition unit has insufficient interfaces, and the acquisition requirement of network source coordination is difficult to meet.
Disclosure of Invention
The invention aims to provide a grid source coordinated grid related parameter distributed acquisition and centralized transmission device which is arranged at a power plant side and can acquire real-time dynamic data, running states, grid related parameter fixed values and the like of a unit excitation system and a speed regulating system, thereby realizing continuous monitoring of a generator control system, providing effective technical conditions for fault prevention and system analysis, and providing data source support for advanced applications of a dispatching master station and a power plant monitoring background.
In order to achieve the above purpose, the solution of the invention is:
a network source coordination network-related parameter variable distributed acquisition and centralized transmission device comprises at least 1 set of communication host and a plurality of acquisition units, wherein a master-slave structure is adopted, the communication host is used as a host, and the acquisition units are used as slaves; the acquisition unit can be compatible with a plurality of types of acquisition interfaces of a generator control system, is used for acquiring generator set excitation system information and speed regulation system information and uploading the information to the communication host, so that the intelligent distributed acquisition of main operation data, key control variables, state events and networking parameters of all the generator set excitation systems and speed regulation systems in the power plant is realized; the communication host is connected with each acquisition unit (slave), collects, calculates and analyzes the edge of the information sent by the acquisition unit, and sends the result to realize the centralized collection and processing of the acquired data.
Specifically, the communication host implements the following functions: performing edge calculation analysis on the running real-time state of each unit, calculating an effective value or amplitude of a collection quantity, calculating the current power, frequency, phase difference, power factor, power angle, potential, rotating speed, impedance, heat capacity value of a stator and a rotor, voltage-frequency ratio and the like of the unit, and comprehensively reflecting the running state of the unit; performing online checking on the unit control model, and performing early warning aiming at abnormal states and operation boundaries; and forming a wave recording file under the condition of system disturbance or unit fault.
Aiming at different types of data interfaces of an excitation/speed regulation system, a collecting unit (slave) realizes multi-element differential collection and comprises the following steps: 1) directly acquiring real-time analog quantity of an excitation system through the output of a mutual inductor, a transmitter or a controller DA; 2) directly acquiring real-time analog quantity of a speed regulating system through the output of a controller DA; 3) collecting real-time state quantity through an excitation and speed regulation system output dry contact; 4) acquiring real-time data through rapid communication with an excitation/speed regulation system; 5) and acquiring non-real-time data such as the running state, abnormal events, network-related parameter fixed values and the like of the excitation/speed regulation system in a communication mode.
Each acquisition unit (slave) is directly connected with the communication host by adopting point-to-point rapid communication, and the acquisition unit transmits acquired data to the communication host; the acquisition unit is provided with a redundant data transmitting port and a receiving port.
The communication host synchronously acquires the monitoring data of each unit received by different receiving ports at the same interrupt time, and forms a data frame covering the monitoring data of all units with time scales after the data frame is summarized.
The communication host has data sending ports with the number equal to that of the data receiving ports, and can send data to all the acquisition units (slave machines).
The communication host can be configured singly or in a redundant manner.
The communication host transmits the monitoring data, the edge calculation results, the online check results and the wave recording files of all the generator sets in the plant to a single or a plurality of monitoring backgrounds in a communication mode for displaying, storing, calling and applying by the monitoring backgrounds.
The communication host transmits real-time/non-real-time data to the monitoring background in a dual-channel separation mode, and the transmission rate is adjustable; the real-time data comprises main electrical quantity, key control quantity, switching value and the like of the unit, and the non-real-time data comprises steady-state data, parameter fixed values, waveform files, event records and the like.
After the scheme is adopted, the invention has the following beneficial effects:
(1) the network source coordination grid-related parameter distributed acquisition and centralized transmission device provides a transformation scheme for a network source coordination online monitoring system of a power plant, and is convenient to realize and popularize;
(2) the real-time online monitoring of the unit running state, the key variables, the state events and the grid-related parameters by the power plant and the power grid is realized, and the operation, the maintenance and the fault analysis are facilitated;
(3) and a technical foundation is laid for improving the network source coordination automation level.
Drawings
FIG. 1 is a schematic diagram of a master-slave architecture according to an embodiment of the present invention;
FIG. 2 is a diagram of a mode of an interface of an excitation collection slave according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an interface of a speed-regulating acquisition slave according to an embodiment of the present invention;
FIG. 4 is a diagram of a communication host interface according to an embodiment of the present invention.
Detailed Description
The technical solution and the advantages of the present invention will be described in detail with reference to the accompanying drawings.
The invention provides a network source coordination network-related parameter distributed acquisition and centralized transmission device, which comprises 1 set of communication host and a plurality of acquisition units (slave), adopts a host (machine) and slave (machine) structure, acquires main operation data, key control variables, state events and network-related parameters of a generator set excitation system and a speed regulation system, and realizes the functions of edge calculation analysis and model checking of the unit operation state by centralized collection, edge calculation analysis and background transmission.
Fig. 1 is a schematic diagram of a master (machine) + slave (machine) type structure for realizing the system, wherein an acquisition unit belongs to a slave machine, and is responsible for directly performing multi-element differential information interaction with a unit control system, acquiring required analog quantity, state quantity and network-related parameters, and performing edge calculation. Each generator set can be provided with 2 acquisition units which are respectively used for acquiring excitation system information and speed regulation system information; 1 acquisition unit can be configured to acquire information of the excitation system and the speed regulation system at the same time; the excitation system information and the speed regulation system information specifically comprise main operation data, key control variables, state events and networking parameters of the excitation system and the speed regulation system. The communication host is responsible for collecting, edge calculating, analyzing and processing the information of the collected slave and uploading the result. At least 1 communication host is configured for 1 station, and double redundant configuration can be realized, and the communication host can receive information sent by more than 8 generator set acquisition units.
The acquisition unit is directly connected with the communication host point to point through optical fibers, so that the information from the acquisition slave to the communication host is rapidly transmitted. The communication speed between the acquisition unit and the communication host can be divided into a plurality of gears according to the acquisition requirement, dynamic data is transmitted at a high speed, and state quantity, parameters and the like are transmitted at a low speed.
The acquisition unit is arranged in a control room of each unit and is close to the monitored equipment, so that the accuracy and the speed of the acquired signals are not influenced.
Fig. 2 is an interface type of the excitation collecting slave machine, which includes an ac signal direct collecting interface, a dc analog quantity direct collecting interface, a fast communication collecting interface, a slow communication interface, a switching quantity collecting interface, an optical fiber interface, and the like.
The alternating current signal direct acquisition interface meets the requirements of terminal voltage PT secondary wiring and terminal current CT secondary wiring access. The direct current analog quantity direct acquisition interface meets the access requirements of 4-20mA and 0-5V, and acquisition of analog quantities such as excitation voltage, excitation current, synchronous voltage, control voltage, PSS output, voltage reference values and the like is achieved. The quick communication acquisition interface is a network interface or an optical fiber interface, and realizes the communication acquisition of the real-time quantity of the excitation system. The slow communication interface supports a Modbus RTU protocol and is used for acquiring the constant value and the state quantity of the excitation system. The switching value interface is used for collecting excitation limiting action signals, running state signals, demagnetization switch position signals and the like. The optical fiber interface supports an IEC60044-8 protocol and is responsible for transmitting the acquired excitation system information and the analysis and calculation result to the communication host.
Besides the acquisition function, the excitation acquisition slave machine also has an edge calculation function. Based on the collected quantity, active power, reactive power, unit frequency, rotating speed, phase difference, power factor, power angle, unit potential, impedance and stator and rotor accumulated heat capacity are calculated, collected excitation state quantity is analyzed and classified according to fault type, limitation type, alarm type and operation type, excitation constant value is classified according to main loop, PSS, adjustment difference, over excitation limitation, low excitation limitation and V/F limitation, and PT disconnection, communication abnormity and measurement loop abnormity are alarmed in real time.
Fig. 3 is a diagram of interface types of the speed-regulating acquisition slave machine, which include a direct-current analog quantity direct acquisition interface, a fast communication acquisition interface, a slow communication interface, a switching quantity acquisition interface, an optical fiber interface and the like.
The direct-current analog quantity direct-sampling interface meets the access requirements of 4-20mA and 0-5V, and real-time quantity acquisition of the rotating speed (difference) of a steam turbine of the thermal power DEH system, the front steam pressure of a main steam valve, the steam pressure of a regulation stage and the like is achieved. The quick communication acquisition interface is a network port or an optical fiber interface, and can be communicated with a unit speed regulator system to realize the acquisition of real-time quantity and parameters of the speed regulator system. The slow communication interface supports protocols such as Modbus RTU and the like, meets the communication requirement with the speed regulating system, and realizes the acquisition of the state quantity and the control parameters of the speed regulating system of the unit. The switching value interface collects signals of PLU action, primary frequency modulation input and the like. The optical fiber interface supports an IEC60044-8 protocol and is responsible for uploading acquired speed regulating system information and analysis and calculation results to the plant monitoring host.
The speed regulation acquisition unit has the function of monitoring and alarming the abnormality of the measurement loop and the communication abnormality in real time.
Fig. 4 shows the interface types of the plant monitoring host, including the system voltage direct sampling interface, the optical fiber interface, the network interface, the LC optical interface, etc.
The system voltage direct sampling interface meets the requirement of system voltage PT secondary wiring access. The optical fiber interface supports the IEC60044-8 protocol and realizes the receiving of the information sent by all the acquisition slave machines. The network port supports double channels to transmit real-time data and non-real-time data respectively, the non-real-time data (analog quantity and state quantity with low real-time performance, unit network-related parameter fixed value, offline waveform and the like) are transmitted by adopting an IEC61850 protocol, and the real-time data (dynamic data of an excitation and speed regulation system) are transmitted by adopting a GB/T26865.2 protocol. The LC optical port has the same function as the network port.
Besides the communication function, the station monitoring host also has the functions of excitation model checking, excitation limit on-line evaluation, speed regulation model checking, triggering wave recording and the like.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention.

Claims (10)

1. A network source coordination network-related parameter variable distributed acquisition and centralized transmission device is characterized in that: the system comprises a communication host and a plurality of acquisition units, wherein a master-slave structure is adopted, the communication host is used as a host, and the acquisition units are used as slaves; the acquisition unit can be compatible with a plurality of types of acquisition interfaces of the generator set control system, so as to acquire generator set excitation system information and speed regulation system information and upload the information to the communication host; the communication host computer collects, calculates and analyzes the information sent by the acquisition unit, and sends the result.
2. The network source coordination network-related parameter variable distributed acquisition and centralized transmission device according to claim 1, characterized in that: performing edge calculation analysis on the running real-time state of each unit, calculating an effective value or amplitude of a collection quantity, calculating the current power, frequency, phase difference, power factor, power angle, potential, rotating speed, impedance, heat capacity value of a stator and a rotor, voltage-frequency ratio and the like of the unit, and comprehensively reflecting the running state of the unit; performing online checking on the unit control model, and performing early warning aiming at abnormal states and operation boundaries; and forming a wave recording file under the condition of system disturbance or unit fault.
3. The network source coordination network-related parameter variable distributed acquisition and centralized transmission device according to claim 1, characterized in that: each generator set is provided with 1 acquisition unit and simultaneously acquires excitation system information and speed regulation system information, or each generator set is provided with 2 acquisition units and respectively acquires the excitation system information and the speed regulation system information.
4. The network source coordination network-related parameter variable distributed acquisition and centralized transmission device according to claim 1, characterized in that: the collection unit can be compatible with the multi-type collection interface of the generator set control system, so that the collection of the generator set excitation system information and the speed regulation system information specifically comprises the following steps:
directly acquiring real-time analog quantity of an excitation system through the output of a mutual inductor, a transmitter or a controller DA; directly acquiring real-time analog quantity of a speed regulating system through the output of a controller DA; collecting real-time state quantity through an excitation and speed regulation system output dry contact; acquiring real-time data through rapid communication with an excitation/speed regulation system; and acquiring non-real-time data of the excitation/speed regulation system in a communication mode.
5. The network source coordination network-related parameter variable distributed acquisition and centralized transmission device according to claim 1, characterized in that: each acquisition unit is directly connected with the communication host through point-to-point rapid communication, and the acquisition units transmit acquired data to the communication host; the acquisition unit is provided with a redundant data transmitting port and a receiving port.
6. The network source coordinated network-related parameter distributed acquisition and centralized transmission device of claim 5, wherein: the communication host synchronously acquires the monitoring data of each generator set received by different receiving ports at the same interruption time, and forms a data frame with a time scale and covering the monitoring data of all the generator sets after the data frame is summarized.
7. The network source coordinated network-related parameter distributed acquisition and centralized transmission device of claim 5, wherein: the communication host is provided with data sending ports with the number equal to that of the data receiving ports and sends data to each acquisition unit.
8. The network source coordination network-related parameter variable distributed acquisition and centralized transmission device according to claim 1, characterized in that: the communication host is configured in a single mode or in a double-redundancy mode.
9. The network source coordination network-related parameter variable distributed acquisition and centralized transmission device according to claim 1, characterized in that: the communication host transmits the monitoring data, the edge calculation results, the online check results and the wave recording files of all the generator sets in the plant to a single or a plurality of monitoring backgrounds in a communication mode for displaying, storing, calling and applying by the monitoring backgrounds.
10. The network source coordinated network-related parameter distributed acquisition and centralized transmission device of claim 9, wherein: the communication host transmits real-time/non-real-time data to the monitoring background in a dual-channel separation mode, and the transmission rate is adjustable; the real-time data comprises unit electrical quantity, key control quantity and switching value, and the non-real-time data comprises steady-state data, parameter fixed values, waveform files and event records.
CN201910932649.XA 2019-09-29 2019-09-29 Network source coordination network-related parameter variable distributed acquisition and centralized transmission device Pending CN112578738A (en)

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CN113882997A (en) * 2021-08-16 2022-01-04 国网新源控股有限公司 Hydroelectric generating set adjusting method and system based on block chain

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CN104767598A (en) * 2015-01-15 2015-07-08 国家电网公司 Data transmission system and method used between energy storage power station site equipment
CN105471108A (en) * 2015-12-24 2016-04-06 安徽立卓智能电网科技有限公司 Full-caliber power generation data collecting terminal facing network source coordination
CN106771852A (en) * 2016-11-25 2017-05-31 国网浙江省电力公司电力科学研究院 A kind of online monitoring data unification collection of net source and analysis and processing method

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CN101140462A (en) * 2007-10-10 2008-03-12 上海可鲁系统软件有限公司 Distributed digital centralized control system
CN104269937A (en) * 2014-10-23 2015-01-07 国家电网公司 Operation monitoring system for distributed photovoltaic power station
CN104767598A (en) * 2015-01-15 2015-07-08 国家电网公司 Data transmission system and method used between energy storage power station site equipment
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CN113882997A (en) * 2021-08-16 2022-01-04 国网新源控股有限公司 Hydroelectric generating set adjusting method and system based on block chain
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Application publication date: 20210330