CA2903912C - Network for online monitoring of power transformer at intelligent substation - Google Patents
Network for online monitoring of power transformer at intelligent substation Download PDFInfo
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- CA2903912C CA2903912C CA2903912A CA2903912A CA2903912C CA 2903912 C CA2903912 C CA 2903912C CA 2903912 A CA2903912 A CA 2903912A CA 2903912 A CA2903912 A CA 2903912A CA 2903912 C CA2903912 C CA 2903912C
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 198
- 238000004804 winding Methods 0.000 claims abstract description 29
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 6
- 239000013307 optical fiber Substances 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims description 41
- 238000002604 ultrasonography Methods 0.000 claims description 12
- 238000004861 thermometry Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
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- 238000004587 chromatography analysis Methods 0.000 claims description 3
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- 238000010586 diagram Methods 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
- H02J13/00017—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00028—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00034—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving an electric power substation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2835—Specific substances contained in the oils or fuels
- G01N33/2841—Gas in oils, e.g. hydrogen in insulating oils
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
-
- Y—GENERAL 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
A network for online monitoring of a power transformer at an intelligent substation, the network comprehensively taking into consideration all the current online monitoring items for a power transformer, including online monitoring of gas and micro-water dissolved in oil, online monitoring of sleeve pipes, online monitoring of winding optical fiber temperature measurement, online monitoring of local discharge, online monitoring of iron core grounding current, online monitoring of infrared temperature measurement, online monitoring of vibration, online monitoring of transformer load capacity, etc.; and comprehensively studying and specifying the basic configuration, technical parameters, etc. of each monitoring item. For the network for online monitoring of a power transformer at an intelligent substation, the technologies of online monitoring of a power transformer at an intelligent substation are studied in detail, the study covering the current monitoring principles and monitoring technology indicators of all transformer online monitoring units domestically available, and transformer load capacity monitoring units are proposed and applied for the first time, and the functions of online monitoring system software are studied in detail, thus establishing a complete set of normative technical standards of a power transformer online monitoring system for intelligent substations in the whole province.
Description
NETWORK FOR ONLINE MONITORING OF POWER
TRANSFORMER AT INTELLIGENT SUBSTATION
FIELD
[0001] The disclosure relates to a system for monitoring a power system, and particularly to an online monitoring network for a power transformer in a substation.
BACKGROUND
TRANSFORMER AT INTELLIGENT SUBSTATION
FIELD
[0001] The disclosure relates to a system for monitoring a power system, and particularly to an online monitoring network for a power transformer in a substation.
BACKGROUND
[0002] Presently, there is no complete and systematic specification and restriction on a technical parameter, software and hardware configuration, a system function and the like of an online monitoring unit for a nationwide power grid. Transformers in various substations are monitored in their substations respectively, operation status of all transformers within an area can not be understood as a whole, and it is difficult to give an operation instruction.
SUMMARY
SUMMARY
[0003] The object of the disclosure is to achieve a network system for online monitoring intelligently transformers in various substations within an area.
[0004] To achieve the above object, a technical solution according to the disclosure is as follows. An intelligent online monitoring network for a power transformer in a substation is provided, where a data communication server in the substation establishes communication with a monitoring unit in each of transformers in the substation, and establishes communication with a main station; the monitoring unit includes one or more of an in-oil dissolved gas and micro water monitoring unit, a bushing monitoring unit, a winding temperature monitoring unit, a partial discharge monitoring unit, an iron core current monitoring unit, an infrared thermometry monitoring unit, a vibration monitoring unit, and a transformer capacity expansion monitoring unit.
[0005] Each of the monitoring units is provided with a sensor and/or an executor, and an intelligent assembly, the sensor and/or the executor is arranged inside or outside a high voltage device or components of the high voltage device, the sensor is connected to the intelligent assembly via an analog signal cable, the executor is connected to the intelligent - t -assembly via an analog signal cable or an optical fiber network, and the intelligent assembly and the power transformer are organically integrated via the sensor or executor, outputs measurement data to the data communication server, backs up the measurement data into an internal storage, and outputs a control command to the executor.
[0006] The data communication server in the substation is provided with a display unit and a device for inputting a control command.
[0007] A monitoring method using an intelligent online monitoring network for a power transformer in a substation is provided, where monitoring data collection, data processing, standardized data communication agency, threshold comparison, and monitoring and pre-alarming are performed based on an acquired signal through a monitoring unit;
where, an dissolved gas in oil and micro water monitoring unit analyzes H2, CO, CO2, CH4, C2H4, C2H6, C2H2, and H20 acquired periodically through a sensor by chromatography;
a bushing monitoring unit acquires periodically a voltage of a bus TV, a harmonic voltage of the bus TV, a system frequency of the bus TV, and an iron core current through a straight-through current transformer;
a winding temperature monitoring unit acquires periodically internal winding temperature of the power transformer through a temperature sensor, and acquires the temperature when sensors of other monitoring units operating;
a partial discharge monitoring unit acquires discharge status of the power transformer in a real time manner by ultrasound partial discharge monitoring, ultra high frequency partial discharge monitoring, or high frequency partial discharge monitoring;
an iron core current monitoring unit periodically samples currents on an iron core grounding line by the straight-through current transformer;
an infrared thermometry monitoring unit implements real-time online temperature measurement through a fixed infrared monitoring apparatus;
a vibration monitoring unit acquires a transformer case vibration of the three-phase winding in a real time manner through a vibration sensor mounted at a high voltage side case wall for the three-phase winding of the power transformer;
a transformer capacity expansion monitoring unit acquires periodically oil temperature and winding temperature of the power transformer through a temperature sensor, calculates winding life of the power transformer, checks overload operation ability of the power transformer; and parameters acquired by the above monitoring units are compared with preset security requirement thresholds respectively; the parameter are output to a data communication server in the case that the parameters are in ranges of the preset security requirement thresholds; or the parameters and an alarm signal are output to the data communication server in the case that the parameters are not in the ranges of the preset security requirement thresholds.
where, an dissolved gas in oil and micro water monitoring unit analyzes H2, CO, CO2, CH4, C2H4, C2H6, C2H2, and H20 acquired periodically through a sensor by chromatography;
a bushing monitoring unit acquires periodically a voltage of a bus TV, a harmonic voltage of the bus TV, a system frequency of the bus TV, and an iron core current through a straight-through current transformer;
a winding temperature monitoring unit acquires periodically internal winding temperature of the power transformer through a temperature sensor, and acquires the temperature when sensors of other monitoring units operating;
a partial discharge monitoring unit acquires discharge status of the power transformer in a real time manner by ultrasound partial discharge monitoring, ultra high frequency partial discharge monitoring, or high frequency partial discharge monitoring;
an iron core current monitoring unit periodically samples currents on an iron core grounding line by the straight-through current transformer;
an infrared thermometry monitoring unit implements real-time online temperature measurement through a fixed infrared monitoring apparatus;
a vibration monitoring unit acquires a transformer case vibration of the three-phase winding in a real time manner through a vibration sensor mounted at a high voltage side case wall for the three-phase winding of the power transformer;
a transformer capacity expansion monitoring unit acquires periodically oil temperature and winding temperature of the power transformer through a temperature sensor, calculates winding life of the power transformer, checks overload operation ability of the power transformer; and parameters acquired by the above monitoring units are compared with preset security requirement thresholds respectively; the parameter are output to a data communication server in the case that the parameters are in ranges of the preset security requirement thresholds; or the parameters and an alarm signal are output to the data communication server in the case that the parameters are not in the ranges of the preset security requirement thresholds.
[0008] A network system and a controlling method thereof according to the disclosure have the following advantages.
[0009] 1) Online monitoring intelligent alarm analysis and auxiliary decision prompting
[0010] The system has a function of alarming in stratified classification way and in different colors and levels. The system has a function of alarming in different colors and levels and in stratified and classified way. it is provided an online monitoring intelligent alarm window, which pops up automatically at the time of alarming, and a auxiliary decision is provided in the window under the state of alarming. An intelligent decision is made based on a rule database /an expert base containing historical data and various abnormalities, and the causes of the abnormities are prompted and a prevention and treatment is provided.
[0011] 2) State evaluation, risk assessment, and health level intelligent analysis
[0012] The system may be operated manually to evaluate a transformer offline and online and generate a state evaluation report, based on a component deduction rule and a state evaluation rule, by analyzing various data and information provided by an device analyzing center and a monitoring center. The system may also execute automatically state evaluation on a power transformer periodically, and an evaluation content and an evaluation period may be set by a user.
[0013] The system may execute risk assessment on a transformer from security, operation, and cost, in conjunction with a state evaluation result, the abnormalities, and the historical data. Health level of a transformer is determined based on an assessment content, historical tendency analysis, sudden changing in a state, and an extent of overlimit. The health level is divided into four levels, which are a normal state, an attention state, an abnormal state, and a serious state respectively.
[0014] 3) Synchronous display of electric quantity information and non-electric quantity information
[0015] The system has a powerful and rich graphical display function, and based on a user's own needs, the user can execute a plurality of controls, such as translation and partial zooming of a graphical display result of data, and customization of a display effect.
[0016] The system may display monitored data values of a plurality of monitored items for a power transformer, such as dissolved gas in oil and micro water, a bushing, winding temperature, partial discharge, an iron core current, infrared thermometry, vibration, and transformer capacity expansion. The system may provide a plurality of display ways, such as a tendency chart, a bar chart, single data display, and multiple data simultaneous display;
and electric and non-electric quantity information from the same transformer or different transformers may be displayed and compared in the same coordinate chart or table.
and electric and non-electric quantity information from the same transformer or different transformers may be displayed and compared in the same coordinate chart or table.
[0017] 4) A multi-functional communication way and an information transmission approach
[0018] The online monitoring system achieves communication both with a local monitoring device for a power transformer and with a state monitoring system of a distant networking province (city) and large monitoring center. A communication specification of the system meets the IEC61850 communication standard, and information transmission may be performed in a dedicated line, network or the like.
[0019] 5) Extensibility and secondary development function
[0020] The system has an extensibility and secondary development function, and there is no limitation to a type of an accessible monitoring apparatus, a monitoring screen, an analysis report and the like; and functions of the system may also be extended, and an application software uses an service-oriented architecture (SOA) to support an adding operation, a deleting operation, and a modifying operation of a state detection data analysis algorithm, thus being capable of adapting the continuous development of online monitoring and operation management.
BRIEF DESCRIPTION OF THE DRAWINGS
100211 To describe the technical solutions in the embodiments of the invention or in the prior art more clearly, the drawings to be used in describing the embodiments or the prior art will be introduced briefly hereinafter. Apparently, the drawings in the following descriptions are only the embodiments of the invention, and other drawings can be obtained by those skilled in the art according to the provided drawings without creative effort.
[0022] Figure 1 is an architectural diagram of an intelligent online monitoring network for a power transformer in a substation;
Figure 2 is an architectural diagram of a modification of an intelligent online monitoring network for a power transformer in a substation; and Figure 3 is a flowchart of an intelligent advanced application.
DETAILED DESCRIPTION
100231 To make the solutions according to the embodiments of the invention be understood better by those skilled in the art, the embodiments of the invention are further explained in detail in connection with the drawings and the description.
100241 Referring to Figure 1, an intelligent online monitoring network for a power transformer in a substation is divided into three-tier architecture, where a top layer is a main station 1, which is mainly configured to perform overall monitoring, and generally arranged in a control room within an area; a second layer is a data communication server 2, which is arranged in each substation, and configured to acquire monitoring data of a transformer 3 in the each substation and transmit the data to the main station 1 via a network;
a third layer is transformers 3 in the substation, several monitoring units are arranged in each of the transformers 3, and each of the monitoring units transmits data acquired by itself to the data communication server 2 in the substation where the monitoring unit is arranged, where the IEC61850 communication standard is adopted in the communication between the monitoring unit and the data communication server 2.
[0025] Referring to Figure 2, in a modified intelligent substation, since the communication standard is not adopted in all monitoring units of the existing transformer, a comprehensive monitoring unit 12 may be configured in the transformer 3, and the comprehensive monitoring unit 12 is configured to convert the data acquired by the monitoring units as the data which conforms to the IEC61850 communication standard and transmits the data converted to the data communication server 2.
[0026] The monitoring unit of each transformer 3 may include one or more of the following units: a dissolved gas in oil and micro-water monitoring unit 4, a bushing monitoring unit 5, a winding temperature monitoring unit 6, a partial discharge monitoring unit 7, an iron core current monitoring unit 8, an infrared thermometry monitoring unit 9, a vibration monitoring unit 10, and a transformer capacity expansion monitoring unit 11.
Each of the above monitoring units includes a sensor and/or an executor, and a first level intelligent assembly. The sensor or executor is arranged inside or outside a high voltage device or a component of the high voltage device. Generally, the sensor is connected to the intelligent assembly via an analog signal cable, and the executor is connected to the intelligent assembly via an analog signal cable or an optical fiber network.
The intelligent assembly and the power transformer are organically integrated via the sensor or executor, to implement parts of or all of functions such as measurement, controlling, metering, monitoring, and protection. The intelligent assembly implements automatic acquisition of a state parameter, signal conditioning, analog-digital conversion, and data preprocessing. In addition, the intelligent assembly implements local digitalization and buffering of a monitoring parameter. Meanwhile the intelligent assembly backs up the data during at least one week into an internal storage.
[0027] Configuration of the network is explained below in detail through the following table:
substation number name of device function of device remark dissolved gas inincludes a sensor monitors contents of gas components such oil and and a monitoring as H2, CO, CO2, CI-L, C2ll4, C2H6, and 1 micro-water sub-TED
C2H2 dissolved in oil, and a content of H20 online monitoring in oil of a transformer unit substation number name of device function of device remark monitors a leakage current, capacitance, includes a sensor bushing insulation 2and dielectric loss of a casing, to measure and a monitoring monitoring unit insulation of the casing sub-IED
winding optical includes a sensor fiber and a monitoring monitors temperature of a winding by a 3 thermometry sub-IED
optical fiber temperature sensor online monitoring unit includes an ultrasound partial monitors and locates partial discharge in a ultrasound sensor discharge online transformer through monitoring ultrasound and a monitoring monitoring unit generated by partial discharge sub-TED
includes an ultrahigh monitors and locates partial discharge in a ultrahigh frequency transformer through monitoring an frequency partial partial discharge 4 ultrahigh frequency signal generated by discharge sensor online monitoring partial discharge and a monitoring unit sub-TED
high frequency Includes a high monitors partial discharge through frequency partial partial discharge monitoring an pulse current signal discharge sensor online monitoring generated by partial discharge and a monitoring unit sub-TED
iron core includes a sensor grounding current monitors a grounding current of an iron and a monitoring online monitoring core and a clamp, sub-IED
unit includes a sensor infrared thermometry monitors temperature of a key component and a monitoring 6 sub-IED
online monitoring of a transformer by infrared thermometry unit monitors whether a component such as a includes a sensor transformer winding or a clamp of a transformer is and a monitoring 7 vibration online loose by monitoring the case of the sub-IED
monitoring unit transformer substation number name of device function of device remark monitors temperature of oil and a includes a sensor transformer three-phase load of a transformer, has a and a monitoring capacity sub-IED
8 function of overtemperature alarming, and expansion online checking overload operation ability of the monitoring unit transformer bay level number name of device function of device remark implements functions of monitoring data main IED
transformer collection, data processing, standardized 1 comprehensive data communication agency, threshold monitoring unit comparison, and monitoring pre-alarming for a monitored device in a transformer main station number name of device function of device remark acquires data of a monitored device, stores main frequency:?
temporarily and diagnoses primarily data 2.93 GHz.
of a substation, uniforms a communication memory: > 2G
communication protocol of the substation, provides a hard disk: > 200G
system server uniform communication interface based on IEC61850, and allows the data of the station to be communicated to a distant data platform.
local area network is a high speed switch for forwarding a 2 switch packet between data link sections isolates the substation from a distant data meets a longitudinal center, and provides an authentication and requirement of encryption and 3encryption serve for wide area network secondary safety authentication communication between a superior and a protection on device subordinate controlling system. power is a high performance serial data interface, data transmission and has high reliability, fast speed, and optical fiber distant transmission. And supports an upper 4 channel layer data transmission protocol such as apparatus SCSI and ATM.
substation number name of device function of device remark provides an auxiliary function for normal includes a state operation of the main devices, online monitoring substation screen, a power auxiliary device source, and a communication device [0028] The intelligent online monitoring network for a power transformer in a substation is implemented by monitoring data mainly using the monitoring units, to find abnormities in time.
[0029] the dissolved gas in oil and micro water monitoring unit 4 of the monitoring unit 5 monitors contents of H2, CO, CO2, CH4, C2H4, C2H6, C2H2, and H20 in oil, where chromatography is adopted in the monitoring. A fault may be diagnosed based on component, content, ratio, increment rate of the gas and the like. The dissolved gas in oil and micro water monitoring unit 4 may sample an oil sample twice under the same test condition; and in the case that a deviation between the monitoring results <10%, data is determined to be valid; in the case that a deviation between the monitoring results >10%, data is determined to be invalid and an alarm signal is sent, to ensure stability and accuracy of the measurement data, where a sampling period is not larger than 2 hours and a tolerant pressure at an oil outlet is larger than or equal to 0.34 MPa.
[0030] A straight-through current transformer is used in current sampling of the bushing monitoring unit 5, and a leakage current, capacitance, and dielectric loss of a casing may be monitored. The installation of the sensor does not influence the safe operation of the casing, and the sensor may acquire periodically the voltage of a bus voltage transformer (TV), the harmonic voltage of the bus TV, the system frequency of the bus TV, and the iron core current, where a sampling period < 5 minutes.
[0031] The winding temperature monitoring unit 6 acquires periodically internal winding temperature of the power transformer through a temperature sensor, and acquires the temperature when sensors of other monitoring units operating.
[0032] The partial discharge monitoring unit 7 may be divided into three types of ultrasound partial discharge monitoring, ultrahigh frequency partial discharge monitoring, and high frequency partial discharge monitoring based on different monitoring principles.
With the ultrasound partial discharge monitoring, an ultrasound sensor mounted on the surface of the transformer monitors an ultrasound signal generated by partial discharge in a transformer, to monitor the partial discharge in the transformer. It is demanded that the amplitude and phase of the ultrasound signal may be measured, and the source of the partial discharge may be located. With the ultrahigh frequency partial discharge monitoring, an ultrahigh frequency sensor mounted on an oil drain valve or a hand-hole specially designed of the transformer receives an ultrahigh frequency signal generated by the partial discharge, to monitor the partial discharge in the transformer. It is demanded that the amplitude and phase of the ultrasound signal may be measured. With the high frequency partial discharge monitoring, a wide-band straight-through current sensor mounted on the tap of a bushing or a clamp of an iron core of the transformer acquires a pulse current signal generated by partial discharge, and receives an ultrahigh frequency signal generated by the partial discharge, to monitor the partial discharge in the transformer. It is demanded that the amplitude and phase of the ultrasound signal may be measured. A corresponding data algorithm is required to eliminate interference of various noise signals in an operation environment of the device in measurement, thus acquiring discharge status in the transformer in a real time manner.
[0033] The iron core current monitoring unit 8 monitors a current on an iron core grounding line in a sampling way of a straight-through current transformer, the straight-through current transformer is mounted on the grounding copper bar of the iron core and acquires periodically the current on an iron core grounding line, where the minimal monitoring period is not larger than 1 minute.
[0034] The infrared thermometry monitoring unit 9 implements real-time online temperature measurement through a fixed infrared monitoring apparatus, and has functions such as setting a monitoring area, periodically and automatically inspecting, thus implementing real-time online temperature measurement.
[0035] The vibration monitoring unit 10 measures the vibration of transformer case vibration of the three-phase winding through a vibration sensor mounted at a high voltage side case wall for the three-phase winding of the power transformer, and may analyze a transformer vibration spectrum and have functions of storing data and comparing and - to -analyzing historical data. In the vibration monitoring, a piezoelectric acceleration sensor or speed sensor is generally used and mounted outside an iron case of the transformer, and acquires a transformer case vibration of the three-phase winding in a real time manner.
[0036] The transformer capacity expansion monitoring unit 11 acquires periodically oil temperature and winding temperature of the transformer through a temperature sensor, and is configured to monitor the oil temperature and the winding temperature of the transformer.
The transformer capacity expansion monitoring unit 11 has a function of overtemperature alarming, deriving winding losses of the transformer, calculating winding life of the transformer, and checking overload operation ability of the transformer.
[0037] Parameters acquired by the above monitoring units are compared with preset security requirement thresholds (determined based on a power system safety standard) respectively, and the parameter are output to the data communication server 2 in the case that the parameters are in the range of the preset security requirement threshold; the parameters and an alarm signal are output to the data communication server 2 in the case that the parameters are not in the range of the preset security requirement threshold.
[0038] After sending the alarm out, the monitoring system monitors and eliminates the alarm in accordance with a flowchart of an intelligent advanced application as shown in Figure 3. Specifically, each monitoring unit executes compares the acquired data with the preset security requirement threshold to detect whether the acquired data is out of the range of the preset security requirement threshold; and in the case that no data is out of the range of the preset security requirement threshold, the monitoring unit performs the next acquisition and comparison; in the case that the data is out of the range of the preset security requirement threshold, the monitoring unit analyzes the data based on a certain rule, sends an overlimit alarm and a corresponding alarm level, prompts a cause of the abnormity, and exports a specification and a treatment from the data base. In this case, the monitoring unit waits to be operated by an operator, and in the case that the abnormity is eliminated by the operator, the alarm is removed, in the case that the abnormity is not eliminated by the operator, the alarm remains.
[0039] The network according to the disclosure may collect data by querying auto polling.
In the networkõ a state parameter of a monitored device is monitored and recorded continuously or periodically, a state change of the device is tracked timely and effectively.
The manner of acquiring a signal by a monitoring apparatus does not influence the wiring and grounding of the transformer, and the safe operation of the transformer. A
data acquisition period of the monitoring apparatus may be set locatedly or remotely, and a sampling period of the online monitoring system may also be set by a user himself.
[0040] A uniform data base is established in the network, and data are stored in chronological order, to implement centralized management of online data.
Original data, such as device parameters of a transformer, a test report, a description, drawings, historical monitoring data (a data list and primary graph) and alarm information are stored. The historical monitoring data and the drawings may be stored for ten years. The data base has a basic function of data query. A user may understand the transformer by the data base.
[0041] The network further has a humanized man-machine interface, to facilitate operating and using. Information, such as real-time latest and historical monitoring data, a table, a tendency chart, alarm information, a state evaluation result, a risk assessment result, a device parameter, and historical data may be queried and viewed. The interface provides a monitored state data and analysis result publishing platform including a data publishing tool such as a graph, a curve, and a report. A data communication server 2 in a substation may further be provided with a display unit and a device for inputting a control command.
[0042] The network established according to the disclosure, may be where a secondary safety protection condition of power is met, may implement in a remote login way operation on a system, such as remote maintenance, upgrade, and diagnosis and elimination of a fault;
and has a function of sharing information, and different users may obtain information resources corresponding to their authority.
[0043] The disclosure is described above exemplarily in conjunction with the drawings, and obviously, a specific implementation of the disclosure is not limited to the above ways, and various insubstantial improvements made by using a concept of the method and technical solutions according to the disclosure, or application of the concept and the technical solutions according to the disclosure directly to other fields without improvements will fall into the scope of protection of the disclosure.
[0044] As can be seen from the above description of the embodiments, it can be understood clearly by those skilled in the art that some or all of the steps in the embodiment of the method described above can be implemented by means of software in addition to necessary common hardware platform. Based on such understanding, the part of the technical solution of the disclosure that is in essential or contributes to the prior art can be embodied in software product, which can be stored in the storage medium, such as a ROM/RAM, a magnetic disk, and an optical disk, and include several instructions adapted to cause a computer device (such as a personal computer, a server, or a network communication device such as a media gateway) to implement the method described in all or some of the embodiments of the disclosure.
[0045] It should be noted that, the various embodiments of the disclosure are described in a progressive manner. For the same or similar parts between the various embodiments, one can refer to the other embodiments, the emphasis of each of the various embodiments points to the difference between it and the other embodiments. Particularly, for the embodiments of the device and the system, the description thereof is relatively simple since the device and the system correspond to the method, and the relevant portion may refer to the description of the embodiment of the method. The embodiments of the device and the system described above is simply exemplary, where units explained as separated components may be or may also not be separated physically, and components displayed as units may be or may also not be physical units, that is, may located at one place or may also be distributed onto multiple network units. The object of the solutions according to the embodiments may be achieved by selecting some or all of modules in the device and the system based on actual needs. The device and the system may be understood and implemented by those skilled in the art without creative effort.
[0046] The above is only a preferred embodiment of the invention, and is not used to limit the scope of protection of the disclosure. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the disclosure falls into the scope of protection of the disclosure.
BRIEF DESCRIPTION OF THE DRAWINGS
100211 To describe the technical solutions in the embodiments of the invention or in the prior art more clearly, the drawings to be used in describing the embodiments or the prior art will be introduced briefly hereinafter. Apparently, the drawings in the following descriptions are only the embodiments of the invention, and other drawings can be obtained by those skilled in the art according to the provided drawings without creative effort.
[0022] Figure 1 is an architectural diagram of an intelligent online monitoring network for a power transformer in a substation;
Figure 2 is an architectural diagram of a modification of an intelligent online monitoring network for a power transformer in a substation; and Figure 3 is a flowchart of an intelligent advanced application.
DETAILED DESCRIPTION
100231 To make the solutions according to the embodiments of the invention be understood better by those skilled in the art, the embodiments of the invention are further explained in detail in connection with the drawings and the description.
100241 Referring to Figure 1, an intelligent online monitoring network for a power transformer in a substation is divided into three-tier architecture, where a top layer is a main station 1, which is mainly configured to perform overall monitoring, and generally arranged in a control room within an area; a second layer is a data communication server 2, which is arranged in each substation, and configured to acquire monitoring data of a transformer 3 in the each substation and transmit the data to the main station 1 via a network;
a third layer is transformers 3 in the substation, several monitoring units are arranged in each of the transformers 3, and each of the monitoring units transmits data acquired by itself to the data communication server 2 in the substation where the monitoring unit is arranged, where the IEC61850 communication standard is adopted in the communication between the monitoring unit and the data communication server 2.
[0025] Referring to Figure 2, in a modified intelligent substation, since the communication standard is not adopted in all monitoring units of the existing transformer, a comprehensive monitoring unit 12 may be configured in the transformer 3, and the comprehensive monitoring unit 12 is configured to convert the data acquired by the monitoring units as the data which conforms to the IEC61850 communication standard and transmits the data converted to the data communication server 2.
[0026] The monitoring unit of each transformer 3 may include one or more of the following units: a dissolved gas in oil and micro-water monitoring unit 4, a bushing monitoring unit 5, a winding temperature monitoring unit 6, a partial discharge monitoring unit 7, an iron core current monitoring unit 8, an infrared thermometry monitoring unit 9, a vibration monitoring unit 10, and a transformer capacity expansion monitoring unit 11.
Each of the above monitoring units includes a sensor and/or an executor, and a first level intelligent assembly. The sensor or executor is arranged inside or outside a high voltage device or a component of the high voltage device. Generally, the sensor is connected to the intelligent assembly via an analog signal cable, and the executor is connected to the intelligent assembly via an analog signal cable or an optical fiber network.
The intelligent assembly and the power transformer are organically integrated via the sensor or executor, to implement parts of or all of functions such as measurement, controlling, metering, monitoring, and protection. The intelligent assembly implements automatic acquisition of a state parameter, signal conditioning, analog-digital conversion, and data preprocessing. In addition, the intelligent assembly implements local digitalization and buffering of a monitoring parameter. Meanwhile the intelligent assembly backs up the data during at least one week into an internal storage.
[0027] Configuration of the network is explained below in detail through the following table:
substation number name of device function of device remark dissolved gas inincludes a sensor monitors contents of gas components such oil and and a monitoring as H2, CO, CO2, CI-L, C2ll4, C2H6, and 1 micro-water sub-TED
C2H2 dissolved in oil, and a content of H20 online monitoring in oil of a transformer unit substation number name of device function of device remark monitors a leakage current, capacitance, includes a sensor bushing insulation 2and dielectric loss of a casing, to measure and a monitoring monitoring unit insulation of the casing sub-IED
winding optical includes a sensor fiber and a monitoring monitors temperature of a winding by a 3 thermometry sub-IED
optical fiber temperature sensor online monitoring unit includes an ultrasound partial monitors and locates partial discharge in a ultrasound sensor discharge online transformer through monitoring ultrasound and a monitoring monitoring unit generated by partial discharge sub-TED
includes an ultrahigh monitors and locates partial discharge in a ultrahigh frequency transformer through monitoring an frequency partial partial discharge 4 ultrahigh frequency signal generated by discharge sensor online monitoring partial discharge and a monitoring unit sub-TED
high frequency Includes a high monitors partial discharge through frequency partial partial discharge monitoring an pulse current signal discharge sensor online monitoring generated by partial discharge and a monitoring unit sub-TED
iron core includes a sensor grounding current monitors a grounding current of an iron and a monitoring online monitoring core and a clamp, sub-IED
unit includes a sensor infrared thermometry monitors temperature of a key component and a monitoring 6 sub-IED
online monitoring of a transformer by infrared thermometry unit monitors whether a component such as a includes a sensor transformer winding or a clamp of a transformer is and a monitoring 7 vibration online loose by monitoring the case of the sub-IED
monitoring unit transformer substation number name of device function of device remark monitors temperature of oil and a includes a sensor transformer three-phase load of a transformer, has a and a monitoring capacity sub-IED
8 function of overtemperature alarming, and expansion online checking overload operation ability of the monitoring unit transformer bay level number name of device function of device remark implements functions of monitoring data main IED
transformer collection, data processing, standardized 1 comprehensive data communication agency, threshold monitoring unit comparison, and monitoring pre-alarming for a monitored device in a transformer main station number name of device function of device remark acquires data of a monitored device, stores main frequency:?
temporarily and diagnoses primarily data 2.93 GHz.
of a substation, uniforms a communication memory: > 2G
communication protocol of the substation, provides a hard disk: > 200G
system server uniform communication interface based on IEC61850, and allows the data of the station to be communicated to a distant data platform.
local area network is a high speed switch for forwarding a 2 switch packet between data link sections isolates the substation from a distant data meets a longitudinal center, and provides an authentication and requirement of encryption and 3encryption serve for wide area network secondary safety authentication communication between a superior and a protection on device subordinate controlling system. power is a high performance serial data interface, data transmission and has high reliability, fast speed, and optical fiber distant transmission. And supports an upper 4 channel layer data transmission protocol such as apparatus SCSI and ATM.
substation number name of device function of device remark provides an auxiliary function for normal includes a state operation of the main devices, online monitoring substation screen, a power auxiliary device source, and a communication device [0028] The intelligent online monitoring network for a power transformer in a substation is implemented by monitoring data mainly using the monitoring units, to find abnormities in time.
[0029] the dissolved gas in oil and micro water monitoring unit 4 of the monitoring unit 5 monitors contents of H2, CO, CO2, CH4, C2H4, C2H6, C2H2, and H20 in oil, where chromatography is adopted in the monitoring. A fault may be diagnosed based on component, content, ratio, increment rate of the gas and the like. The dissolved gas in oil and micro water monitoring unit 4 may sample an oil sample twice under the same test condition; and in the case that a deviation between the monitoring results <10%, data is determined to be valid; in the case that a deviation between the monitoring results >10%, data is determined to be invalid and an alarm signal is sent, to ensure stability and accuracy of the measurement data, where a sampling period is not larger than 2 hours and a tolerant pressure at an oil outlet is larger than or equal to 0.34 MPa.
[0030] A straight-through current transformer is used in current sampling of the bushing monitoring unit 5, and a leakage current, capacitance, and dielectric loss of a casing may be monitored. The installation of the sensor does not influence the safe operation of the casing, and the sensor may acquire periodically the voltage of a bus voltage transformer (TV), the harmonic voltage of the bus TV, the system frequency of the bus TV, and the iron core current, where a sampling period < 5 minutes.
[0031] The winding temperature monitoring unit 6 acquires periodically internal winding temperature of the power transformer through a temperature sensor, and acquires the temperature when sensors of other monitoring units operating.
[0032] The partial discharge monitoring unit 7 may be divided into three types of ultrasound partial discharge monitoring, ultrahigh frequency partial discharge monitoring, and high frequency partial discharge monitoring based on different monitoring principles.
With the ultrasound partial discharge monitoring, an ultrasound sensor mounted on the surface of the transformer monitors an ultrasound signal generated by partial discharge in a transformer, to monitor the partial discharge in the transformer. It is demanded that the amplitude and phase of the ultrasound signal may be measured, and the source of the partial discharge may be located. With the ultrahigh frequency partial discharge monitoring, an ultrahigh frequency sensor mounted on an oil drain valve or a hand-hole specially designed of the transformer receives an ultrahigh frequency signal generated by the partial discharge, to monitor the partial discharge in the transformer. It is demanded that the amplitude and phase of the ultrasound signal may be measured. With the high frequency partial discharge monitoring, a wide-band straight-through current sensor mounted on the tap of a bushing or a clamp of an iron core of the transformer acquires a pulse current signal generated by partial discharge, and receives an ultrahigh frequency signal generated by the partial discharge, to monitor the partial discharge in the transformer. It is demanded that the amplitude and phase of the ultrasound signal may be measured. A corresponding data algorithm is required to eliminate interference of various noise signals in an operation environment of the device in measurement, thus acquiring discharge status in the transformer in a real time manner.
[0033] The iron core current monitoring unit 8 monitors a current on an iron core grounding line in a sampling way of a straight-through current transformer, the straight-through current transformer is mounted on the grounding copper bar of the iron core and acquires periodically the current on an iron core grounding line, where the minimal monitoring period is not larger than 1 minute.
[0034] The infrared thermometry monitoring unit 9 implements real-time online temperature measurement through a fixed infrared monitoring apparatus, and has functions such as setting a monitoring area, periodically and automatically inspecting, thus implementing real-time online temperature measurement.
[0035] The vibration monitoring unit 10 measures the vibration of transformer case vibration of the three-phase winding through a vibration sensor mounted at a high voltage side case wall for the three-phase winding of the power transformer, and may analyze a transformer vibration spectrum and have functions of storing data and comparing and - to -analyzing historical data. In the vibration monitoring, a piezoelectric acceleration sensor or speed sensor is generally used and mounted outside an iron case of the transformer, and acquires a transformer case vibration of the three-phase winding in a real time manner.
[0036] The transformer capacity expansion monitoring unit 11 acquires periodically oil temperature and winding temperature of the transformer through a temperature sensor, and is configured to monitor the oil temperature and the winding temperature of the transformer.
The transformer capacity expansion monitoring unit 11 has a function of overtemperature alarming, deriving winding losses of the transformer, calculating winding life of the transformer, and checking overload operation ability of the transformer.
[0037] Parameters acquired by the above monitoring units are compared with preset security requirement thresholds (determined based on a power system safety standard) respectively, and the parameter are output to the data communication server 2 in the case that the parameters are in the range of the preset security requirement threshold; the parameters and an alarm signal are output to the data communication server 2 in the case that the parameters are not in the range of the preset security requirement threshold.
[0038] After sending the alarm out, the monitoring system monitors and eliminates the alarm in accordance with a flowchart of an intelligent advanced application as shown in Figure 3. Specifically, each monitoring unit executes compares the acquired data with the preset security requirement threshold to detect whether the acquired data is out of the range of the preset security requirement threshold; and in the case that no data is out of the range of the preset security requirement threshold, the monitoring unit performs the next acquisition and comparison; in the case that the data is out of the range of the preset security requirement threshold, the monitoring unit analyzes the data based on a certain rule, sends an overlimit alarm and a corresponding alarm level, prompts a cause of the abnormity, and exports a specification and a treatment from the data base. In this case, the monitoring unit waits to be operated by an operator, and in the case that the abnormity is eliminated by the operator, the alarm is removed, in the case that the abnormity is not eliminated by the operator, the alarm remains.
[0039] The network according to the disclosure may collect data by querying auto polling.
In the networkõ a state parameter of a monitored device is monitored and recorded continuously or periodically, a state change of the device is tracked timely and effectively.
The manner of acquiring a signal by a monitoring apparatus does not influence the wiring and grounding of the transformer, and the safe operation of the transformer. A
data acquisition period of the monitoring apparatus may be set locatedly or remotely, and a sampling period of the online monitoring system may also be set by a user himself.
[0040] A uniform data base is established in the network, and data are stored in chronological order, to implement centralized management of online data.
Original data, such as device parameters of a transformer, a test report, a description, drawings, historical monitoring data (a data list and primary graph) and alarm information are stored. The historical monitoring data and the drawings may be stored for ten years. The data base has a basic function of data query. A user may understand the transformer by the data base.
[0041] The network further has a humanized man-machine interface, to facilitate operating and using. Information, such as real-time latest and historical monitoring data, a table, a tendency chart, alarm information, a state evaluation result, a risk assessment result, a device parameter, and historical data may be queried and viewed. The interface provides a monitored state data and analysis result publishing platform including a data publishing tool such as a graph, a curve, and a report. A data communication server 2 in a substation may further be provided with a display unit and a device for inputting a control command.
[0042] The network established according to the disclosure, may be where a secondary safety protection condition of power is met, may implement in a remote login way operation on a system, such as remote maintenance, upgrade, and diagnosis and elimination of a fault;
and has a function of sharing information, and different users may obtain information resources corresponding to their authority.
[0043] The disclosure is described above exemplarily in conjunction with the drawings, and obviously, a specific implementation of the disclosure is not limited to the above ways, and various insubstantial improvements made by using a concept of the method and technical solutions according to the disclosure, or application of the concept and the technical solutions according to the disclosure directly to other fields without improvements will fall into the scope of protection of the disclosure.
[0044] As can be seen from the above description of the embodiments, it can be understood clearly by those skilled in the art that some or all of the steps in the embodiment of the method described above can be implemented by means of software in addition to necessary common hardware platform. Based on such understanding, the part of the technical solution of the disclosure that is in essential or contributes to the prior art can be embodied in software product, which can be stored in the storage medium, such as a ROM/RAM, a magnetic disk, and an optical disk, and include several instructions adapted to cause a computer device (such as a personal computer, a server, or a network communication device such as a media gateway) to implement the method described in all or some of the embodiments of the disclosure.
[0045] It should be noted that, the various embodiments of the disclosure are described in a progressive manner. For the same or similar parts between the various embodiments, one can refer to the other embodiments, the emphasis of each of the various embodiments points to the difference between it and the other embodiments. Particularly, for the embodiments of the device and the system, the description thereof is relatively simple since the device and the system correspond to the method, and the relevant portion may refer to the description of the embodiment of the method. The embodiments of the device and the system described above is simply exemplary, where units explained as separated components may be or may also not be separated physically, and components displayed as units may be or may also not be physical units, that is, may located at one place or may also be distributed onto multiple network units. The object of the solutions according to the embodiments may be achieved by selecting some or all of modules in the device and the system based on actual needs. The device and the system may be understood and implemented by those skilled in the art without creative effort.
[0046] The above is only a preferred embodiment of the invention, and is not used to limit the scope of protection of the disclosure. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the disclosure falls into the scope of protection of the disclosure.
Claims (6)
1. An intelligent online monitoring network for a power transformer in a substation, wherein:
a data communication server (2) in the substation establishes communication with a monitoring unit in each of transformers (3) in the substation, and establishes communication with a main station (1); the monitoring unit comprises one or more of an dissolved gas in oil and micro water monitoring unit (4), a bushing monitoring unit (5), a winding temperature monitoring unit (6), a partial discharge monitoring unit (7), an iron core current monitoring unit (8), an infrared thermometry monitoring unit (9), a vibration monitoring unit (10), and a transformer capacity expansion monitoring unit (11), wherein, the dissolved gas in oil and micro water monitoring unit (4) analyzes H2, CO, CO2, CH4, C2H4, C2H6, C2H2, and H2O acquired periodically through a sensor by chromatography, wherein, the dissolved gas in oil and micro water monitoring unit (4) samples a same oil sample twice under the same test conditions; and in the case that a deviation between the monitoring results <=10%, data is determined to be valid; or in the case that a deviation between the monitoring results >10%, data is determined to be invalid and an alarm signal is sent;
wherein, the main station comprises a longitudinal encryption and authentication device, which isolates the substation from a distant data center, and provides an authentication and encryption service for wide area network communication between a superior and a subordinate controlling system.
a data communication server (2) in the substation establishes communication with a monitoring unit in each of transformers (3) in the substation, and establishes communication with a main station (1); the monitoring unit comprises one or more of an dissolved gas in oil and micro water monitoring unit (4), a bushing monitoring unit (5), a winding temperature monitoring unit (6), a partial discharge monitoring unit (7), an iron core current monitoring unit (8), an infrared thermometry monitoring unit (9), a vibration monitoring unit (10), and a transformer capacity expansion monitoring unit (11), wherein, the dissolved gas in oil and micro water monitoring unit (4) analyzes H2, CO, CO2, CH4, C2H4, C2H6, C2H2, and H2O acquired periodically through a sensor by chromatography, wherein, the dissolved gas in oil and micro water monitoring unit (4) samples a same oil sample twice under the same test conditions; and in the case that a deviation between the monitoring results <=10%, data is determined to be valid; or in the case that a deviation between the monitoring results >10%, data is determined to be invalid and an alarm signal is sent;
wherein, the main station comprises a longitudinal encryption and authentication device, which isolates the substation from a distant data center, and provides an authentication and encryption service for wide area network communication between a superior and a subordinate controlling system.
2. The intelligent online monitoring network for a power transformer in a substation according to claim 1, wherein each of the monitoring units is provided with a sensor and an executor, and an intelligent assembly, the sensor and the executor is arranged inside or outside a high voltage device or components of the high voltage device, the sensor is connected to the intelligent assembly via an analog signal cable, the executor is connected to the intelligent assembly via an analog signal cable or an optical fiber network, and the intelligent assembly and the power transformer are organically integrated via the sensor or executor, outputs measurement data to the data communication server (2) backs up the measurement data into an internal storage, and outputs a control command to the executor.
3. The intelligent online monitoring network for a power transformer in a substation according to claim 1 or 2, wherein the data communication server (2) in the substation is provided with a display unit and a device for inputting a control command.
4. The intelligent online monitoring network for a power transformer in a substation according to claim 1, wherein: a transformer comprehensive monitoring unit (12) is mounted in each of transformers (3), the transformer comprehensive monitoring unit (12) receives signals acquired by monitoring units in a transformer, and processes and transmits the signals to a data communication server (2) in the substation, and the data communication server (2) transmits signals from all of the transformers to a main station (1).
5. The intelligent online monitoring network for a power transformer in a substation according to claim 1, wherein monitoring data collection, data processing, standardized data communication agency, threshold comparison, and monitoring and pre-alarming are performed based on an acquired signal by the monitoring unit;
wherein:
a bushing monitoring unit (5) acquires periodically a voltage of a bus voltage transformer, a harmonic voltage of the bus voltage transformer, a system frequency of the bus voltage transformer, and an iron core current through a straight-through current transformer;
a winding temperature monitoring unit (6) acquires periodically internal winding temperature of the power transformer through a temperature sensor, and acquires the temperature when sensors of other monitoring units operating;
a partial discharge monitoring unit (7) acquires discharge status of the power transformer in a real time manner by ultrasound partial discharge monitoring, ultrahigh frequency partial discharge monitoring, or high frequency partial discharge monitoring;
an iron core current monitoring unit (8)periodically samples currents on an iron core grounding line by the straight-through current transformer;
an infrared thermometry monitoring unit (9) implements real-time online temperature measurement through a fixed infrared monitoring apparatus;
a vibration monitoring unit (10) acquires a transformer case vibration of the three-phase winding in a real time manner through a vibration sensor mounted at a high voltage side case wall for the three-phase winding of the power transformer; and parameters acquired by the above monitoring units are compared with preset security requirement thresholds respectively; and the parameters are output to a data communication server (2) in the case that the parameters are in ranges of the preset security requirement thresholds; the parameters and an alarm signal are output to the data communication server (2) in the case that the parameters are not in the ranges of the preset security requirement thresholds.
wherein:
a bushing monitoring unit (5) acquires periodically a voltage of a bus voltage transformer, a harmonic voltage of the bus voltage transformer, a system frequency of the bus voltage transformer, and an iron core current through a straight-through current transformer;
a winding temperature monitoring unit (6) acquires periodically internal winding temperature of the power transformer through a temperature sensor, and acquires the temperature when sensors of other monitoring units operating;
a partial discharge monitoring unit (7) acquires discharge status of the power transformer in a real time manner by ultrasound partial discharge monitoring, ultrahigh frequency partial discharge monitoring, or high frequency partial discharge monitoring;
an iron core current monitoring unit (8)periodically samples currents on an iron core grounding line by the straight-through current transformer;
an infrared thermometry monitoring unit (9) implements real-time online temperature measurement through a fixed infrared monitoring apparatus;
a vibration monitoring unit (10) acquires a transformer case vibration of the three-phase winding in a real time manner through a vibration sensor mounted at a high voltage side case wall for the three-phase winding of the power transformer; and parameters acquired by the above monitoring units are compared with preset security requirement thresholds respectively; and the parameters are output to a data communication server (2) in the case that the parameters are in ranges of the preset security requirement thresholds; the parameters and an alarm signal are output to the data communication server (2) in the case that the parameters are not in the ranges of the preset security requirement thresholds.
6. The intelligent online monitoring network for a power transformer in a substation according to claim 5,wherein the transformer capacity expansion monitoring unit (11) acquires periodically oil temperature and winding temperature, and ambient humidity of the power transformer through a temperature sensor, and acquires a three-phase load current of the power transformer through a current sensor, and the transformer capacity expansion monitoring unit (11) calculates winding life of the power transformer by a field operation empirical formula, checks overload operation ability and operation time amount of the power transformer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310073809.2A CN103199621B (en) | 2013-03-07 | 2013-03-07 | The networking of power transformer of intelligent substation on-line monitoring |
| CN201310073809.2 | 2013-03-07 | ||
| PCT/CN2014/072515 WO2014135015A1 (en) | 2013-03-07 | 2014-02-25 | Network for online monitoring of power transformer at intelligent substation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2903912A1 CA2903912A1 (en) | 2014-09-12 |
| CA2903912C true CA2903912C (en) | 2018-02-20 |
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|---|---|---|---|
| CA2903912A Expired - Fee Related CA2903912C (en) | 2013-03-07 | 2014-02-25 | Network for online monitoring of power transformer at intelligent substation |
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| Country | Link |
|---|---|
| CN (1) | CN103199621B (en) |
| CA (1) | CA2903912C (en) |
| WO (1) | WO2014135015A1 (en) |
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| CN103199621B (en) * | 2013-03-07 | 2015-11-11 | 国家电网公司 | The networking of power transformer of intelligent substation on-line monitoring |
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| CN103512619A (en) * | 2013-10-18 | 2014-01-15 | 海南电力技术研究院 | System and method for intelligently monitoring state information of transformer |
| CN104091290A (en) * | 2014-07-11 | 2014-10-08 | 国家电网公司 | Intelligent substation monitoring information diagnosing and analyzing method |
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| CN103199621A (en) | 2013-07-10 |
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