CN104836340A - Intelligent monitoring system for monitoring operation of cabinet type transformer station, and monitoring method thereof - Google Patents
Intelligent monitoring system for monitoring operation of cabinet type transformer station, and monitoring method thereof Download PDFInfo
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- CN104836340A CN104836340A CN201510233433.6A CN201510233433A CN104836340A CN 104836340 A CN104836340 A CN 104836340A CN 201510233433 A CN201510233433 A CN 201510233433A CN 104836340 A CN104836340 A CN 104836340A
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- 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
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- 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
Abstract
The invention discloses an intelligent monitoring system for monitoring operation of a cabinet type transformer station. The intelligent monitoring system comprises an intelligent processor. The intelligent processor is connected with a server, a power supply module, a clock circuit, a memory module, a man-machine interaction module, an RFID module, a protecting unit, a temperature-and-humidity monitoring unit and an electrical parameter measuring unit. The invention further discloses a method for monitoring the cabinet type transformer station through the intelligent monitoring system. Smart grid technology is combined with Internet technology for use in the cabinet type transformer station. Through leading an intelligent monitoring device, a reliable communication manner and a complete communication protocol which match the cabinet type transformer station, self identification, self diagnosis, self monitoring and self action of the cabinet type transformer station are realized.
Description
Technical field
The invention belongs to power equipment monitoring system technical field, relating to a kind of intelligent monitor system for monitoring box substation operation, the invention still further relates to the method utilizing intelligent monitor system to monitor box substation operation.
Background technology
In national urban and rural power grids are built, requirement is that high voltage directly enters load center, to reduce the thermal losses on transmission line, which forms the power supply general layout of high powered-transformer pressure-reducing-low-voltage distribution, box type transformation is stood in power distribution network and is widely used.
Box-type substation is that one integrates high voltage switchgear, distribution transformer and low-voltage distribution equipment, and connect and compose according to the mode of connection of setting, be the primary power distribution equipment being applied to power distribution network; Box-type substation is generally applicable to residential quarters, bustling downtown area and construction site etc., and user can carry out choose reasonable according to different service conditions and load level.
The structure of existing box-type substation is: process layer is simply made up of primary equipment and electromagnetic transformer, process layer is connected by cable with wall, rely on be low speed and short-range serial communication mode, employing be non-universal agreement or proprietary protocol; Communicated by Ethernet mode between wall with station level.
For the various problems that " three-decker " of existing box-type substation exists in hardware configuration, communication mode and communication protocol, researchers have employed with under type: on the basis of primary equipment, add corresponding intelligent monitoring and controlling device, for carrying out DATA REASONING and status monitoring, realize the Real-Time Monitoring to box-type substation ruuning situation; And the communication between wall also becomes more reliable, the fiber optic Ethernet of high speed, and extends WIFI communication; Whole box-type substation related protocol also all meets international transformer station standard agreement IEC61850 that is more perfect, more standard, achieve the Intellectualized monitoring of box-type substation, finally achieve the Urine scent of box-type substation, autodiagnosis, self-monitoring and self-action.
Intelligent monitor system is combined with box-type substation, box-type substation can not only be made more to safely and steadily run, Real-Time Monitoring can also be carried out to box-type substation inner high voltage equipment, transformer, low-voltage equipment and ambient temperature, and by network, all data collected are delivered in Surveillance center, what complete between much information very easily is mutual.
Summary of the invention
The object of the present invention is to provide a kind of intelligent monitor system for monitoring box substation operation, by intelligent power grid technology and Internet technology R. concomitans in box-type substation, by introducing the intelligent monitor system, reliably communication mode and the perfect communication protocol that coordinate with it, achieve the real-time monitoring to box-type substation running.
Another object of the present invention is to provide the method utilizing intelligent monitor system to monitor box substation operation.
The first technical scheme of the present invention is, for monitoring the intelligent monitor system of box substation operation, include intelligent processor, be provided with communication module in intelligent processor, communication module is connected with the server arranged in remote monitoring center by Ethernet, WIFI or IEC61850 agreement; Intelligent processor also respectively with power module, clock circuit, memory module, human-computer interaction module, RFID module, protected location, temperature-humidity monitoring unit and electrical parameter measuring unit connect.
The feature of the first technical scheme of the present invention is also:
LCD MODULE, key-press module and LED display module is respectively arranged with in human-computer interaction module.
RFID module is connected with the high-voltage switch gear in box-type substation, circuit breaker, transformer and instrument transformer respectively by wire.
Be connected by RS232 bus between protected location with intelligent processor; Protected location is connected respectively by the high-voltage switch gear of wire and box-type substation, circuit breaker and transformer.
Temperature-humidity monitoring unit is connected by ZigBee-network or RS485 bus with between intelligent processor, and temperature-humidity monitoring unit is connected with the transformer in box-type substation by wire; Temperature-humidity monitoring unit includes humidity-monitoring unit and temperature monitoring unit; 555 timers and humicap HS1101 is provided with in humidity-monitoring unit; Temperature monitoring unit adopts based on the wireless temperature measuring device of ZigBee or the temp measuring system based on RS485 bus.
Electrical parameter measuring unit is connected by SPI mode with between intelligent processor; Electrical parameter measuring unit is circumscribed with low-side signal monitoring means, low side power monitoring means, low-pressure side energy monitoring unit and low-pressure side frequency monitoring unit respectively by wire.
The double-chip structure that S3C2440A chip combines with STM32F407ZGT6 chip is adopted in intelligent processor; Communicated by SPI mode between S3C2440A chip with STM32F407ZGT6 chip.
The second technical scheme that the present invention adopts utilizes the method that intelligent monitor system is monitored box-type substation, specifically implements according to following steps:
The server arranged in step 1, remote monitoring center reads ICD configuration file under IEC61850 standard agreement, to be read complete after, send data acquisition command to STM32F407ZGT6 chip by the S3C2440A chip in intelligent processor, and wait for the arrival of SPI receive interruption;
Step 2, after step 1, STM32F407ZGT6 receives data acquisition command, is resolved the data acquisition command received by STM32F407ZGT6, pending data acquisition resolve correct after, obtain following electric parameter by electrical parameter measuring unit:
Magnitude of voltage, current value, performance number and frequency values;
Electrical parameter measuring unit is delivered in intelligent processor after being processed by the electric parameter of the acquisition of acquisition, completes the data transmission between electrical parameter measuring unit and intelligent processor;
Step 3, after step 2, the timer of temperature-humidity monitoring unit and STM32F407ZGT6 inside is started by the STM32F407ZGT6 chip controls in intelligent processor, temperature-humidity monitoring unit coordinates with timer, for the acquisition box-type substation inner high voltage room of timing, the temperature data of transformer room and low-pressure chamber and humidity data;
If continuous three temperature datas and humidity data all do not upload or temperature-humidity monitoring unit does not respond, then represent and send temperature, humidity communication failure, now intelligent processor sends communication failure warning, and staff carries out maintenance overhaul;
Step 4, after step 3, temperature-humidity monitoring module sends data acquisition command Ox5AOxOC Ox00CRCL CRCH in intelligent processor, wherein CRCL CRCH is the high eight-bit of check code and low eight respectively, if STM32F407ZGT6 chip receives Ox5AOxA5 OxOD Ox02Ox48 Ox51 CRCL CRCH order, then by SPI communication mode, the encapsulation of the temperature data in STM32F407ZGT6 chip, humidity data and electric parameter is delivered in S3C2440A chip;
Step 5, after step 4, according to transformer station international uniform standard agreement IEC61850, data encapsulation is carried out to all data in S3C2440A chip in intelligent processor, then data packaged in S3C2440A are sent to the client of IEC61850 by Ethernet;
If the data that the client of IEC61850 receives exceed set point, then realize corresponding overcurrent, overvoltage, ground connection, under voltage and humiture protection by protected location;
If what sent by S3C2440A chip is the amount of outputing output command, then controls by protected location the amount of outputing and export; In order to make the amount of outputing correctly export, again to judge intake, judging that if final the amount of outputing is without correct output, then start reclosing or directly send alarm signal, otherwise waiting for the arrival of next time ordering;
Step 6, reciprocation cycle step 1 ~ step 5, final realization utilizes intelligent monitor system to the monitoring of box-type substation inner high voltage switchgear, distribution transformer and low-voltage distribution equipment.
The feature of the second technical scheme of the present invention is also:
The method utilizing electrical parameter measuring unit to obtain electric parameter in step 2 is specifically implemented according to following steps:
Step a, by voltage signal, current signal after voltage transformer pt, Current Transmit isolated variable, send in electrical parameter measuring unit with the form of differential signal;
Step b, after step a, utilize the digital signal processor DSP in computation chip ATT7022C to carry out computing to all data sent in electrical parameter measuring unit, obtain the magnitude of voltage of low pressure inlet wire side, current value, performance number and frequency values as calculated afterwards;
Step c, by SPI serial process interface mode, the magnitude of voltage obtained through step b, current value, performance number and frequency values to be sent to the STM32F407ZGT6 chip in intelligent processor, to complete the data transmission between electrical parameter measuring unit and intelligent processor.
In step 3 temperature-humidity monitoring unit coordinate with timer obtain temperature data, humidity data method respectively as follows:
The method obtaining humidity data is as follows:
Utilize humidity-monitoring unit in temperature-humidity monitoring unit with 555 timers for core circuit, complete the measurement of humidity by humicap HS1101;
The method obtaining temperature data is as follows:
First convert resistance signal to voltage signal, then send in analog to digital converter ADC through differential amplifier circuit, realize the collection of temperature signal; Utilize in PT100 thermometric process, without the need to welding Zero-ohm resistor R
26with sample resistance R
28;
Meanwhile, nursed one's health and remote transmission signal by instrumentation amplifier, in this course by arranging a Zero-ohm resistor, achieving and being switched to 4mA ~ 20mA circuitry for signal measurement from PT100 temperature measuring circuit;
When measuring 4mA ~ 20mA signal, Zero-ohm resistor R be welded
26with sample resistance R
28;
PT100＝V
1′[R
30/(R
19+R
30)-PT100/(R
20+PT100)]；
The temperature measured is implemented according to following algorithm:
PT100
-＝R
PT100′V
1/(PT100+R
20)；
When 4mA ~ 20mA measures, implement according to following algorithm:
PT100
-＝(PT100
-)-R
28′I
4-20mA。
Beneficial effect of the present invention is:
(1) the present invention is for monitoring the intelligent monitor system of box substation operation, global design has been carried out for existing box-type substation, existing box-type substation and intelligent monitor system are organically combined, truly achieves the intellectuality of box-type substation; Make it not only have the traditional function of box-type substation, and there is the function of Urine scent, autodiagnosis, self-monitoring and self-action.
(2) the present invention for monitor box substation operation intelligent monitor system in have employed REID RFID, RFID module is embedded in respectively in circuit breaker, isolating switch, voltage transformer pt summation current transformer CT, achieve and power equipment in box-type substation located accurately and follows the trail of, power equipment multidate information can be understood in time.
(3) the present invention for monitor box substation operation intelligent monitor system involved by electric parameter metering all realize based on high accuracy three-phase electric energy the special metering IC ATT7022C, due to support software calibration, so energy accurately detected current value, magnitude of voltage, frequency values and performance number, the requirement of multi tariff multifunction electric meter can be met.
(4) the present invention is for monitoring the intelligent monitor system of box substation operation, the temperature monitoring point deficiency existed for existing thermometric mode and the drawback easily failed to report, propose a set of temperature monitoring scheme combined based on ZigBee wireless temperature measurement and wired thermometric mode, not only effectively solve the problem that in existing box-type substation, device for detecting temperature is arranged, achieve power equipment in box-type substation and the comprehensive real time on-line monitoring function of ambient temperature, also have the high feature of low cost, low-power consumption and reliability simultaneously concurrently.
(5) the present invention is for monitoring the intelligent monitor system of box substation operation, for the drawback that coverage of communication is low and transmission speed is slow in the past, optical fiber communication mode basis extends high-power WIFI communication; WIFI communication not only effectively solves the drawback of communication mode in the past, and its networking flexibility.
(6) the present invention is for monitoring in the intelligent monitor system of box substation operation, what intelligent processor adopted is dual-cpu structure based on S3C2440A and STM32F407ZGT6, there is efficient disposal ability fast and real-time monitoring capacity, all information is carried out concentrated collection by dual processors module, and follow IEC61850 standard agreement, by Optical Fiber Transmission in server, this agreement solves between different production equipment and causes the disagreeableness problem of interoperability because communication protocol is inconsistent.
(7) the intelligent monitor system external server of the present invention for monitoring box substation operation, can by the database of all information in intelligent monitor system in real time stored in the information platform be connected with intelligent monitor system, can analyze the Monitoring Data in one period, and set up the information database of box-type substation.
Accompanying drawing explanation
Fig. 1 is that the present invention is for monitoring the structural representation of the intelligent monitor system of box substation operation;
Fig. 2 is that the present invention is for monitoring the workflow diagram of the intelligent monitor system of box substation operation;
Fig. 3 is that the present invention is for monitoring the intelligent monitor system of box substation operation to transformer in box type transformer station temperature/4mA-20mA measurement result schematic diagram;
Fig. 4 is the illustraton of model utilizing intelligent monitor system to monitor the logical device LD built in box substation operation process.
In figure, 1. intelligent processor, 1-1. communication module; 2. server, 3. power module, 4. clock circuit; 5. memory module, 6. human-computer interaction module, 6-1. liquid crystal display; 6-2. key-press module; 6-3.LED display module, 7.RFID module, 8. protected location; 9. temperature-humidity monitoring unit, 10. electrical parameter measuring unit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The present invention is for monitoring the intelligent monitor system of box substation operation; its structure as shown in Figure 1; include intelligent processor 1; intelligent processor 1 respectively with server 2, power module 3, clock circuit 4, memory module 5, human-computer interaction module 6, RFID module 7, protected location 8, temperature-humidity monitoring unit 9 and electrical parameter measuring unit 10 connect.
Be provided with communication module 1-1 in intelligent processor 1, communication module 1-1 is connected by Ethernet, WIFI or IEC61850 agreement and the server 2 that arranges in remote monitoring center.
The dual chip adopting S3C2440A chip to combine with STM32F407ZGT6 chip in intelligent processor 1, is communicated by SPI mode between S3C2440A chip with STM32F407ZGT6 chip.
In intelligent processor 1, using STM32F407ZGT6 as from processor, for obtaining the warm and humid angle value of environment, magnitude of voltage, current value, performance number and frequency values; Using S3C2440A as primary processor, on the one hand by SPI interface and from carrying out data interaction between processor STM32F407ZGT6 and order is assigned, on the other hand by ethernet communication mode (expansion WIFI mode), be uploaded to the server 2 in remote monitoring center after carrying out data encapsulation and protocol conversion according to transformer station international uniform consensus standard IEC61850, achieve the interoperability between real time communication between intelligent processor 1 and Surveillance center's server 2 and equipment.
Intelligent processor 1 is connected with power module 3 by wire, and power module 3 is powered for giving intelligent processor 1, guarantees the operation of intelligent processor 1.
Intelligent processor 1 is connected with clock circuit 4 by wire, and clock circuit 4 is for providing time data.
Intelligent processor 1 is connected with memory module 5 by wire, for temporarily storing circuit breaker, high-voltage switch gear, the humiture information of surrounding environment and electric parameter.
Intelligent processing unit 1 is connected with human-computer interaction module 6 by wire, is respectively arranged with LCD MODULE 6-1, key-press module 6-2 and LED display module 6-3 in human-computer interaction module 6.
Human-computer interaction module 6: for completing assigning of host computer order and uploading of terminal data; Demonstrate the temperature value of surrounding environment, humidity value and time data by LCD MODULE 6-1, key-press module 6-2 is used for the break-make of control circuit, and LED display module 6-3 is then for showing the specific works state of circuit breaker.
RFID module 7 is connected with the high-voltage switch gear in box-type substation, circuit breaker, transformer and instrument transformer respectively.RFID module 7: for accurately locating the high-tension apparatus in box-type substation, transformer, low-voltage equipment, follow the trail of, so that timely understanding equipment multidate information.
Intelligent processor 1 is connected with protected location 8 by RS232 bus; Protected location 8 is connected with the high-voltage switch gear in box-type substation, circuit breaker and transformer respectively by wire.
Protected location 8 carries out information interaction by RS232 mode and intelligent processor 1, by the running status of intake circuit with the amount of outputing circuit Real-time Obtaining high-voltage switch gear, circuit breaker and transformer, and realize fault alarm and trip avoidance function by the relay of the amount of outputing circuit, thus the gentle coefficient of safety of the Automated water that improve intelligent box substation; Circuit breaker and high-voltage switch gear are then for completing overvoltage, overcurrent and point voltage, undercurrent protection action; Improve the gentle coefficient of safety of Automated water of intelligent box substation.
Intelligent processor 1 is connected with temperature-humidity monitoring unit 9 by ZigBee-network or RS485 bus; Temperature-humidity monitoring unit 9 is connected with the transformer in box-type substation by wire; Temperature-humidity monitoring unit 9 includes humidity-monitoring unit and temperature monitoring unit.
Humidity-monitoring unit for core circuit, completes measurement by humicap HS1101 with 555 timers.
Temperature monitoring unit obtains temperature data based on three line PT100 thermometry, the Resistance Influence that wire brings can be overcome, reduce the measure error of temperature, reduce the too high damage caused of transformer Yin Wendu, as shown in Figure 3, voltage-stabiliser tube TL431AILP is wherein supplied to the stable voltage of full-bridge circuit one, and PT100 is as a brachium pontis of full-bridge circuit, and temperature monitoring unit coordinates with timer and obtains temperature data; Temperature monitoring unit adopts based on the wireless temperature measuring device of ZigBee or the temp measuring system based on RS485 bus, adopts the wireless temperature measuring device based on ZigBee at the common thermal source position of contact of breaker, isolating switch rotary contact, these narrow spaces of busbar crimp head place and difficult wiring; And in hyperbaric chamber, transformation room, these places being beneficial to wiring of low-pressure chamber adopt the more cheap temp measuring system based on RS485 bus of price.
Temperature-humidity monitoring unit 9: for the epidemic disaster around Real-time Obtaining intelligent box substation; Information exchange is carried out by wireless temperature measurement ZigBee-network or between wired thermometric RS485 communication mode and intelligent processor 1.
Intelligent processor 1 is connected with electrical parameter measuring unit 10 by SPI (i.e. Serial Peripheral Interface (SPI)), achieves electrical parameter measuring unit 10 and carries out information exchange by SPI mode and intelligent processor 1, improve the certainty of measurement of data.
Electrical parameter measuring unit 10 is circumscribed with low-side signal monitoring means, low side power monitoring means, low-pressure side energy monitoring unit and low-pressure side frequency monitoring unit respectively, cooperatively interact for Obtaining Accurate magnitude of voltage, current value, performance number and frequency values, complete the measurement that electrical parameter is measured; Coordinate SPI communication mode between electrical parameter measuring unit 10 with intelligent processor 1, make intelligent processor 1 can Obtaining Accurate magnitude of voltage, current value, performance number and frequency values.
The three-phase electric energy the special metering IC ATT7022C of support software calibration is have employed in electrical parameter measuring unit 10.
The method that the present invention utilizes intelligent monitor system to monitor box-type substation, as shown in Figure 2, specifically implement according to following steps:
The server 2 arranged in step 1, remote monitoring center reads ICD configuration file under IEC61850 standard agreement, to be read complete after, send data acquisition command to STM32F407ZGT6 chip by the S3C2440A chip in intelligent processor 1, and wait for the arrival of SPI receive interruption;
Step 2, after step 1, STM32F407ZGT6 receives data acquisition command, is resolved the data acquisition command received by STM32F407ZGT6, pending data acquisition resolve correct after, obtain following electric parameter by electrical parameter measuring unit 10:
Magnitude of voltage, current value, performance number and frequency values;
Electrical parameter measuring unit 10 is delivered in intelligent processor 1 after the temperature value of acquisition and electric parameter being processed, and completes the data transmission between electrical parameter measuring unit 10 and intelligent processor 1;
In order to improve the electric parameter metering precision of electrical parameter measuring unit 10, being configured with the three-phase electric energy the special metering IC ATT7022C of support software calibration in electrical parameter measuring unit 10, and establishing metering circuit as core;
Electrical parameter measuring unit 10 is utilized to obtain the method for electric parameter as follows:
Step a, by voltage signal, current signal after voltage transformer pt, Current Transmit isolated variable, send in electrical parameter measuring unit 10 with the form of differential signal;
Step b, after step a, utilize the digital signal processor DSP in computation chip ATT7022C to carry out computing to all data sent in electrical parameter measuring unit 10, obtain the magnitude of voltage of low pressure inlet wire side, current value, performance number and frequency values as calculated afterwards;
Step c, by SPI serial process interface mode, the magnitude of voltage obtained through step b, current value, performance number and frequency values to be sent to the STM32F407ZGT6 chip in intelligent processor 1, to complete the data transmission between electrical parameter measuring unit 10 and intelligent processor 1.
Step 3, after step 2, the timer of temperature-humidity monitoring unit 9 and STM32F407ZGT6 chip internal is started by the STM32F407ZGT6 chip controls in intelligent processor 1, temperature-humidity monitoring unit 9 coordinates with timer, for the acquisition box-type substation inner high voltage room of timing, the temperature data of transformer room and low-pressure chamber and humidity data;
If continuous three temperature datas and humidity data are not all uploaded or temperature-humidity monitoring unit 9 not response, then represent and send temperature, humidity communication failure, now intelligent processor 1 sends communication failure warning, and staff carries out maintenance overhaul;
Utilize humidity-monitoring unit in temperature-humidity monitoring unit 9 with 555 timers for core circuit, measurement is completed by humicap HS1101, its principle is: humicap HS1101 is along with the change of humidity, frequency ensues change, and then output voltage changes, the relation indirect according to voltage and frequency change obtains current humidity;
Utilize the temperature monitoring unit in temperature-humidity monitoring unit 9 to obtain temperature value, concrete method is as follows:
In temperature monitoring unit, first convert resistance signal to voltage signal, then send in analog to digital converter ADC through differential amplifier circuit, realize the collection of temperature signal; Utilize in PT100 thermometric process, without the need to welding Zero-ohm resistor R
26with sample resistance R
28;
Meanwhile, nursed one's health and remote transmission signal by instrumentation amplifier, in this course, voltage signal is easily subject to noise jamming and the distributed resistance of transmission line also can bring voltage drop, make voltage as signal transmission and inadvisable, and current signal well can avoid the interference that noise brings, by arranging a Zero-ohm resistor, achieving and being switched to 4mA ~ 20mA circuitry for signal measurement from PT100 temperature measuring circuit;
When measuring 4mA ~ 20mA signal, Zero-ohm resistor R be welded
26with sample resistance R
28;
PT100＝V
1′[R
30/(R
19+R
30)-PT100/(R
20+PT100)]；
The temperature measured is implemented according to following algorithm:
PT100
-＝R
PT100′V
1/(PT100+R
20)；
When 4mA ~ 20mA measures, implement according to following algorithm:
PT100
-＝(PT100
-)-R
28′I
4-20mA；
The temperature monitoring point existed for temperature monitoring system in existing box-type substation is not enough, easily fail to report and drawback that traditional thermometric mode exists; Temperature monitoring unit proposes based on ZigBee wireless temperature measurement and the temperature monitoring scheme that combines based on wired thermometric mode of RS485 bus, is specially:
At the common thermal source position of contact of breaker, isolating switch rotary contact and this kind of narrow space of busbar crimp head, difficult wiring, the wireless temperature measuring device based on ZigBee is installed; In hyperbaric chamber, transformation room, low-pressure chamber these be beneficial to the place of wiring, adopt the temp measuring system based on RS485 bus that price is more cheap; Such design not only effectively solves conventional boxes temperature monitoring device Problems existing, achieves the comprehensive real time on-line monitoring function of case temperature, also has the feature of low cost, low-power consumption and reliability concurrently.
Step 4, after step 3, temperature-humidity monitoring module 9 sends data acquisition command Ox5AOxOC Ox00 CRCL CRCH in intelligent processor 1, wherein CRCL CRCH is the high eight-bit of check code and low eight respectively, if STM32F407ZGT6 chip receives Ox5A OxA5 OxOD Ox02 Ox48 Ox51 CRCL CRCH order, then by SPI communication mode, the encapsulation of the temperature data in STM32F407ZGT6 chip, humidity data and electric parameter (magnitude of voltage, current value, performance number and frequency values) is delivered in S3C2440A chip.
Step 5, after step 4, according to transformer station international uniform standard agreement IEC61850, data encapsulation is carried out to the data in S3C2440A chip in intelligent processor 1, then data packaged in S3C2440A chip are sent to the client of IEC61850 by Ethernet;
If the data that the client of IEC61850 receives exceed set point, then realize corresponding overcurrent, overvoltage, ground connection, under voltage and humiture protection by protected location 8;
If what sent by S3C2440A chip is the amount of outputing output command, then controls by protected location the amount of outputing and export; In order to ensure that the amount of outputing can correctly export, again to judge intake, judging that if final the amount of outputing is without correct output, then start reclosing or directly send alarm signal, otherwise waiting for the arrival of next time ordering.
The unfriendly problem of Interoperability is caused because communication protocol is inconsistent in order to solve manufacturer, the S3C2440A chip of intelligent processing unit 1 is when transmitting data, except encapsulating data according to IEC61850 agreement and send to the client of IEC61850, will based on easily extensible tagging language (Extensible markup Language in the process transmitting data, XML) information model is set up, to improve the interoperability between equipment.
The intelligent monitor system that the present invention is used for box-type substation becomes multiple logical node according to Function Decomposition, information structure outside multiple logical node and multiple logical node logical device (Logic Device, LD), one or more logical device then constitutes the service unit (server) that IEC61850 agreement specifies, the concrete construction method of information model as shown in Figure 4:
Step 1), construction logic equipment, specifically in accordance with the following methods build:
According to intelligent monitor system function, the intelligent monitor system being used for box-type substation is divided into information gathering fastener 11AI (being made up of electrical parameter measuring unit 10 and temperature-humidity monitoring unit 9), intelligent processor 1 (FTU), human-computer interaction module 6 (HMI) three is part and LD1, LD2, LD3, LD4, LD5 five independently logical device independently;
Each actual functional capability of logical device is defined as an example of logical node class;
Logical device LD1 resides in information gathering fastener AI, is mainly used in realizing sampling functions; Logical device LD2, in intelligent processor 1, is mainly used in realizing measurement function, and electrical parameter measuring unit 10 (MMXU) represents the measurement of voltage, electric current, frequency, meritorious, idle and power factor; Logical device LD3 in intelligent processor 1, be mainly used in realization open into/output and controlling functions, CSWI represents on-off controller, and XCBR represents circuit-breaker switching on-off, and XSWI represents on-load switch divide-shut brake, and GGIO represents universal input/output; Logical device LD4, in intelligent processor 1, is mainly used in realizing defencive function, and PTRC represents total protection act, and PTOC represents overcurrent protection, and PTOV represents overvoltage protection, PTUV under voltage protection, PTEF ground protection, PVOC inverse time protection; Logical device LD5 resides in human-computer interaction module 6, is mainly used in realizing human interface function, and human-computer interaction module 6 represents setting and manual operation function on the spot.
Wherein, each logical device both defines these two requisite logical nodes of itself LLN0 and LPHD; The common data of logical node LLN0 presentation logic equipment, as: nameplate, equipment running status information; LPHD represents the common data of the physical equipment having logical node, as: the nameplate of physical equipment and the information of row situation;
Step 2), through step 1) after, modeling is carried out to logical node LN:
Current transformer TCTR, voltage transformer TVTR and electrical parameter measuring unit 10 are the main logic nodes realizing intelligent monitor system intelligent functions of the present invention, data are gathered by the current transformer TCTR in logical device LD1 and voltage transformer TVTR, and obtained by logical device LD2 measurement monitoring, by logical device LD3 and logical device LD4 realize intelligent box substation open into/output control and the function such as virtual protection, complete corresponding human-computer interaction module 6 finally by logical device LD5;
Electrical parameter measuring unit 10 inherits the whole specified data object in common logic node LLN0 as logical node, includes pattern (Mod), performance behavior (Beh), health status (Health), logical node nameplate (NamPlt) and status information data object (EEHealth); But the data object of electrical parameter measuring unit 10 can not satisfy the demands completely in IEC61850 agreement, therefore except standard measured except, also will increase the data object of new measured information according to extension rule, total active-power P, total reactive power Q, total apparent power S, average power factor PF, frequency, line voltage, phase voltage, phase current, individual event are gained merit common ratio, reactive power and humiture information.
Step 6, reciprocation cycle step 1 ~ step 5, final realization utilizes intelligent monitor system to the monitoring of box-type substation inner high voltage switchgear, distribution transformer and low-voltage distribution equipment.
The present invention not only has the function of existing box-type substation for the intelligent monitor system monitoring box substation operation, and the monitoring achieved box-type substation inner high voltage equipment, transformer, low-voltage equipment, ambient temperature, electric parameter, carry out the mutual of various information by network by between the server 2 in the data collected and remote monitoring center simultaneously.
Claims (10)
1. for monitoring the intelligent monitor system of box substation operation, it is characterized in that, include intelligent processor (1), be provided with communication module (1-1) in described intelligent processor (1), described communication module (1-1) is connected with the server arranged in remote monitoring center (2) by Ethernet, WIFI or IEC61850 agreement;
Described intelligent processor (1) also respectively with power module (3), clock circuit (4), memory module (5), human-computer interaction module (6), RFID module (7), protected location (8), temperature-humidity monitoring unit (9) and electrical parameter measuring unit (10) connect.
2. intelligent monitor system according to claim 1, it is characterized in that, in described human-computer interaction module (6), be respectively arranged with LCD MODULE (6-1), key-press module (6-2) and LED display module (6-3).
3. intelligent monitor system according to claim 1, is characterized in that, described RFID module (7) is connected with the high-voltage switch gear in box-type substation, circuit breaker, transformer and instrument transformer respectively by wire.
4. intelligent monitor system according to claim 1, is characterized in that, is connected between described protected location (8) with described intelligent processor (1) by RS232 bus;
Described protected location (8) is connected respectively by the high-voltage switch gear of wire and box-type substation, circuit breaker and transformer.
5. intelligent monitor system according to claim 1, is characterized in that, described temperature-humidity monitoring unit (9) is connected by ZigBee-network or RS485 bus with between described intelligent processor (1); Described temperature-humidity monitoring unit (9) is connected with the transformer in box-type substation by wire;
Described temperature-humidity monitoring unit (9) includes humidity-monitoring unit and temperature monitoring unit;
555 timers and humicap HS1101 is provided with in described humidity-monitoring unit;
Described temperature monitoring unit adopts based on the wireless temperature measuring device of ZigBee or the temp measuring system based on RS485 bus.
6. intelligent monitor system according to claim 1, is characterized in that, described electrical parameter measuring unit (10) is connected by SPI mode with between intelligent processor (1);
Described electrical parameter measuring unit (10) is circumscribed with low-side signal monitoring means, low side power monitoring means, low-pressure side energy monitoring unit and low-pressure side frequency monitoring unit respectively by wire.
7. the intelligent monitor system according to any one in claim 1 ~ 6, is characterized in that, adopts the double-chip structure that S3C2440A chip combines with STM32F407ZGT6 chip in described intelligent processor (1);
Described S3C2440A chip is communicated by SPI mode with between STM32F407ZGT6 chip.
8. the method utilizing intelligent monitor system to monitor box-type substation, is characterized in that, specifically implements according to following steps:
The server (2) arranged in step 1, remote monitoring center reads ICD configuration file under IEC61850 standard agreement, to be read complete after, send data acquisition command to STM32F407ZGT6 chip by the S3C2440A chip in intelligent processor (1), and wait for the arrival of SPI receive interruption;
Step 2, after step 1, STM32F407ZGT6 receives data acquisition command, resolved the data acquisition command received by STM32F407ZGT6, pending data acquisition is resolved correctly, obtains following electric parameter by electrical parameter measuring unit (10):
Magnitude of voltage, current value, performance number and frequency values;
Electrical parameter measuring unit (10) is delivered in intelligent processor (1) after being processed by the electric parameter of the acquisition of acquisition, completes the data transmission between electrical parameter measuring unit (10) and intelligent processor (1);
Step 3, after step 2, the timer of temperature-humidity monitoring unit (9) and STM32F407ZGT6 inside is started by the STM32F407ZGT6 chip controls in intelligent processor (1), temperature-humidity monitoring unit (9) coordinates with timer, for the acquisition box-type substation inner high voltage room of timing, the temperature data of transformer room and low-pressure chamber and humidity data;
If continuous three temperature datas and humidity data are not all uploaded or temperature-humidity monitoring unit (9) not response, then represent and send temperature, humidity communication failure, now intelligent processor (1) sends communication failure warning, and staff carries out maintenance overhaul;
Step 4, after step 3, temperature-humidity monitoring module (9) sends data acquisition command Ox5A OxOC Ox00 CRCL CRCH in intelligent processor (1), wherein CRCLCRCH is the high eight-bit of check code and low eight respectively, if STM32F407ZGT6 chip receives Ox5A OxA5 OxOD Ox02 Ox48 Ox51 CRCL CRCH order, then by SPI communication mode, the encapsulation of the temperature data in STM32F407ZGT6 chip, humidity data and electric parameter is delivered in S3C2440A chip;
Step 5, after step 4, according to transformer station international uniform standard agreement IEC61850, data encapsulation is carried out to the data in the interior S3C2440A chip of intelligent processor (1), then data packaged in S3C2440A are sent to the client of IEC61850 by Ethernet;
If the data that the client of IEC61850 receives exceed set point, then realize corresponding overcurrent, overvoltage, ground connection, under voltage and humiture protection by protected location (8);
If what sent by S3C2440A chip is the amount of outputing output command, then controls by protected location the amount of outputing and export; In order to ensure that the amount of outputing can correctly export, again to judge intake, judging that if final the amount of outputing is without correct output, then start reclosing or directly send alarm signal, otherwise waiting for the arrival of next time ordering;
Step 6, reciprocation cycle step 1 ~ step 5, final realization utilizes intelligent monitor system to the monitoring of box-type substation inner high voltage switchgear, distribution transformer and low-voltage distribution equipment.
9. the method utilizing intelligent monitor system to monitor box-type substation according to claim 8, is characterized in that, the method utilizing electrical parameter measuring unit (10) to obtain electric parameter in described step 2 is specifically implemented according to following steps:
Step a, by voltage signal, current signal after voltage transformer pt, Current Transmit isolated variable, send in electrical parameter measuring unit (10) with the form of differential signal;
Step b, after step a, utilize the digital signal processor DSP in computation chip ATT7022C to carry out computing to all data sent in electrical parameter measuring unit (10), obtain the magnitude of voltage of low pressure inlet wire side, current value, performance number and frequency values as calculated afterwards;
Step c, by SPI serial process interface mode, the magnitude of voltage obtained through step b, current value, performance number and frequency values to be sent to the STM32F407ZGT6 chip in intelligent processor (1), to complete the data transmission between electrical parameter measuring unit (10) and intelligent processor (1).
10. the method utilizing intelligent monitor system to monitor box-type substation according to claim 8, it is characterized in that, in described step 3 temperature-humidity monitoring unit (9) coordinate with timer obtain temperature data, humidity data method respectively as follows:
The method obtaining humidity data is as follows:
Utilize humidity-monitoring unit in temperature-humidity monitoring unit (9) with 555 timers for core circuit, complete the measurement of humidity by humicap HS1101;
The method obtaining temperature data is as follows:
First convert resistance signal to voltage signal, then send in analog to digital converter ADC through differential amplifier circuit, realize the collection of temperature signal; Utilize in PT100 thermometric process, without the need to welding Zero-ohm resistor R
26with sample resistance R
28;
With meanwhile, nursed one's health and remote transmission signal by instrumentation amplifier, in this course by arranging a Zero-ohm resistor, achieving and being switched to 4mA ~ 20mA circuitry for signal measurement from PT100 temperature measuring circuit;
When measuring 4mA ~ 20mA signal, Zero-ohm resistor R be welded
26with sample resistance R
28;
PT100＝V
1×[R
30/(R
19+R
30)-PT100/(R
20+PT100)]；
The temperature measured is implemented according to following algorithm:
PT100
-＝R
PT100×V
1/(PT100+R
20)；
When 4mA ~ 20mA measures, implement according to following algorithm:
PT100
-＝(PT100
-)-R
28×I
4-20mA。
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Effective date of registration: 20200110 Address after: 710075 Room 501, block B, Zhengxin building, No.5, Gaoxin 1st Road, Zhangba Street office, hi tech Zone, Xi'an City, Shaanxi Province Patentee after: Xi'an Guanglin Huizhi Energy Technology Co., Ltd Address before: 710048 Shaanxi city of Xi'an Province Jinhua Road No. 19 Patentee before: Xi'an Engineering Univ. |