CN109406960A - A kind of partial discharge of transformer on-line detecting system and method based on wireless sensor - Google Patents
A kind of partial discharge of transformer on-line detecting system and method based on wireless sensor Download PDFInfo
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- CN109406960A CN109406960A CN201811216119.7A CN201811216119A CN109406960A CN 109406960 A CN109406960 A CN 109406960A CN 201811216119 A CN201811216119 A CN 201811216119A CN 109406960 A CN109406960 A CN 109406960A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A kind of partial discharge of transformer on-line detecting system and method based on wireless sensor, is related to live detection technical field.The present invention is to solve the problem of to monitor transformer wide apart in practical substation field, have a large amount of measurement line.The present invention acquires transformer data by ultrasonic sensor, extra-high video sensor, transfers data to backstage using wireless communication protocol.Backstage personnel transfer abnormal signal data at any time and analyze, and finally draw a conclusion.It solves the problems, such as that the timeliness of measuring transformer shelf depreciation, live cable measure wiring problem and avoid using the present invention and monitors transformer wide apart.
Description
Technical field
The invention belongs to live detection technical fields.
Background technique
In practical substation field, monitoring transformer wide apart has a large amount of measurement line to be not easy to be routed.
Wireless sensor network is multi-functional, self-organizing the network systems such as collection computer technology, a wireless communication technique
System structure.By acquiring and handling the data in covering wireless sensor region, sends server terminal to, will largely effectively may be used
The information leaned on sends user to.
Currently, wireless short-range communication mainly has bluetooth and tri- kinds of Wi-Fi.Bluetooth transmission distance is shorter, anti-interference and pacifies
Full property is lower, and the memory that Wi-Fi protocol stack accounts for is big, and power consumption is big and complicated.
Summary of the invention
The present invention is to solve in practical substation field, and monitoring transformer wide apart has a large amount of measurement line
Problem provides a kind of partial discharge of transformer on-line detecting system based on wireless sensor and method now to solve above-mentioned ask
Topic.
A kind of partial discharge of transformer on-line detecting system based on wireless sensor, including with lower unit:
Data acquisition unit: using each state information of sensor acquisition transformer, the state information is electricity
Flow signal or voltage signal；
Data transmission unit: the state information of acquisition is sent to host computer using ZigBee wireless communication protocol.
Data transmission unit includes: multiple terminal nodes, multiple router nodes and a coordinator node；
Terminal node is used to drive each state information of sensor acquisition transformer and the state information by acquisition
Router node is uploaded to,
Coordinator node wirelessly obtains state information from router node and sends supreme position machine.
Coordinator node includes wireless communication module, power module and serial communication modular；
Power module is used to power for wireless communication module and serial communication modular,
Wireless communication module is used to wirelessly obtain state information from router node,
Serial communication modular is for state information to be sent in host computer from wireless communication module.
Wireless communication module is CC2530 chip, and serial communication modular is SP3232 chip.
Sensor described in data acquisition unit is ultrasonic sensor and extra-high video sensor.
A kind of transformer local discharging on-line detecting method based on wireless sensor, comprising the following steps:
Data collection steps: using each state information of sensor acquisition transformer, the state information is electricity
Flow signal or voltage signal；
Data transmission step: the state information of acquisition is sent to host computer using ZigBee wireless communication protocol.
Whether detecting step: containing abnormal signal in detecting state amount information,
State judgment step: when in state information contain abnormal signal when, transfer abnormal signal and analyzed, according to point
Analysis result judges whether current transformer state is abnormal.
The beneficial effects of the present invention are:
The present invention acquires transformer data by ultrasonic sensor, extra-high video sensor, will be counted using wireless communication protocol
According to be transferred to backstage.Backstage personnel transfer abnormal signal data at any time and analyze, and finally draw a conclusion.It is solved using the present invention
The timeliness of measuring transformer shelf depreciation, live cable measurement wiring problem and avoid monitoring transformer wide apart
The problem of.
Detailed description of the invention
Fig. 1 is a kind of partial discharge of transformer on-line checking system based on wireless sensor described in specific embodiment one
The schematic illustration of system；
Fig. 2 is node hardware composed structure schematic diagram；
Fig. 3 is the electrical block diagram of CC2530 chip；
Fig. 4 is ZigBee-network constructional flow figure；
Fig. 5 is a kind of partial discharge of transformer on-line checking side based on wireless sensor described in specific embodiment two
The flow chart of method.
Specific embodiment
The basis of ZigBee technology is IEEE802.15.4 international standard protocol.IEEE802.15.4 protocol stack is based on mark
Quasi- seven layer model of OSI, it defines bottom i.e. two layers physical layer (PHY) and medium access control layer (MAC).ZigBee connection
Alliance has formulated the protocol stack as ZigBee such as network layer, safe floor and application programming interfaces.Safe floor (Security) is main
Carry out the tasks such as the management, storage and reading of key.Application programming interfaces include supporting (Application using sublayer
Sub-layer Support, APS), ZigBee device object (ZigBee Device Object, ZDO) etc., provide the user with
Some application software interfaces, to carry out the management to equipment.Physical layer to providing interface between MAC layer and physical radio channel,
Management entity (PLME) inside physical layer is responsible for calling management service interface, and carries out safeguarding internal PAN information bank
(PHY PIB)。
The frequency range of wireless network communication technique ZigBee is 869/915MHz and 2.4GHz, according to IEEE802.15.4
International standard protocol regulation, defines 869/915MHz physical layer and 2.4GHz physical layer the two standards, they are all based on
Direct Sequence Spread Spectrum (DSSS) technology, it is identical in that all using identical physical layer data packet format, difference is work frequency
Rate, modulation technique and transmission rate are different.Direct sequence spread spectrum skill mainly carrys out high-speed sequence spreading in transmitting terminal
The signal extension of frequency spectrum is carried out, while de-spreading these sequences in receiving end, becomes original signal.DSSS is by pseudo noise sequence
Column generate compound key by channel coding to carry out carrier modulation, by data to reach modulation carrier wave purpose.ZigBee technology tool
There is very strong ad hoc network function, network topology structure includes star-like, tree-shaped and reticular pattern topology.Star Network has topology letter
The features such as list, strong antijamming capability, it is suitably applied substation.
Therefore low-power, low cost, internal structure are simple, the closer ZigBee of transmission range is more suitably applied to electromagnetic environment
Complexity, the higher substation of voltage class.The application, to solve in practical substation field, has a large amount of using ZigBee technology
Measurement line, cause the problem of field wiring difficulty.
Specific embodiment 1: illustrating present embodiment, a kind of base described in present embodiment referring to figs. 1 to Fig. 4
In the partial discharge of transformer on-line detecting system of wireless sensor, agreement, avoids wired data transfer by wireless communication.
Monitoring is acquired to the shelf depreciation of transformer main in substation by setting up ZigBee wireless sensor network, and is passed through
Data terminal storage, in case calling at any time.Monitoring system can be divided into following three parts:
(1) data acquisition based on sensor terminal node, major part are terminal nodes by being fixed on transformation
Sensor on device is acquired signal, and terminal node configures ultrasonic sensor and extra-high video sensor, realizes to transformer
The acquisition of internal partial discharge quantity.
(2) networking based on ZigBee technology, wireless data transmission, this part, which is mainly realized, can collect terminal node
Data coordinator node is transmitted to by wireless network, then be sent to information eventually by serial ports after being converged by coordinator node
Terminal, in case calling analysis at any time.
(3) the host computer observation interface part based on LabVIEW.This partial function mainly will receive network by serial ports
The data sent, are shown in a manner of data with host computer interface, and data exception warning note and number has also been devised
According to store function.
Specific structure includes with lower unit: data acquisition unit: being acquired using ultrasonic sensor and extra-high video sensor
Each state information of transformer, the state information are current signal or voltage signal；Data transmission unit: it utilizes
The state information of acquisition is sent to host computer by ZigBee wireless communication protocol.
The data transmission unit includes: multiple terminal nodes, multiple router nodes and a coordinator node；
Terminal node need to assisted due to needing that sensor is driven to be acquired each state information of transformer
The sensor of detection shelf depreciation is configured on the basis of tune device and router, but since the important process of terminal node is negative
Duty acquisition data are simultaneously sent to upper layer network, therefore can also remove unnecessary serial port module portion to save hardware cost
Point.Terminal node is used to drive each state information of sensor acquisition transformer and uploads the state information of acquisition
To router node, coordinator node wirelessly obtains state information from router node and sends supreme position
Machine.Router node and coordinator node use identical hardware design substantially, and the function of realizing is different according to the software of compiling
And it is different.But it works since router node does not undertake with the serial communication of PC machine, so not including setting for serial communication modular
Meter.
Coordinator node includes wireless communication module, power module and serial communication modular；Power module is for being wireless
Communication module and serial communication modular power supply, wireless communication module from router node for wirelessly obtaining state
Information is measured, serial communication modular is for state information to be sent in host computer from wireless communication module.
Wireless communication module is CC2530 chip, includes crystal oscillation clock circuit, radio frequency input, output matching circuit, power supply
Circuit, Interface Expanding circuit and anti-jamming circuit, as shown in Figure 2.CC2530 chip be based on Zigbee protocol on the basis of it is new
The SOC chip of a generation and real on-chip system chip are freely supported IEEE802.15.4 standard, and are adapted to conform with
The Z-Stack protocol stack of ZigBee standard application, it will be integrated with radio frequency chip and micro-chip processor, Embedded
One high performance RF transferring and receiving apparatus, enhanced 8051MCU, In-System Programmable flash memory, 8KBRAM and other powerful function
Energy.It also possesses a set of extensive peripheral hardware, ADC and 21 general extension GPIO for being including 2 USART, in high precision 14, with
And other peripheral equipments.CC2530 has multiple-working mode, so that it is particularly suitable for the requirement of system low-power consumption, and work
Conversion time between operation mode is extremely short, and it further ensures the low-power consumption of system operation.Based on above-mentioned advantage, this project is hard
It has selected CC2530 chip as main control chip in part design, has carried out the hardware module development of each circuit of system.CC2530 core
Piece hardware design is as shown in Figure 3.
Serial communication modular is SP3232 chip, and transceiver uses RS232 chip.It is peculiar with one in SP3232 chip
Charge pump circuit, allow it to generate the voltage level signal for meeting RS232 from the supply voltage of+3.0V-+5.5V.
This system uses SP3232 chip in the design to realize the serial communication with the end PC.SP3232 family chip is RS232 transmitting-receiving
Device is specifically for portable or hand portable equipment a solution, and SP232 has the characteristics that low-power consumption, in shutdown mode
Under electric current there was only 1uA, power consumption can greatly be reduced and extend the battery life of portable equipment, this low-power consumption of SP3232
The advantages of make it meet very much the design requirement of wireless sensor node low-power consumption.
The establishment of ZigBee-network can only realize by coordinator unit, and have in a ZigBee-network and can only
There is a coordinator node.The application layer of coordinator unit calls NLME_NETWORK_FORMATION.request primitive, hair
Establish network request out, network layer receives this primitive and MAC layer is required to execute energy scan detection scanning, with this come select can
Then the channel of receiving can execute active scan on all acceptable channels, while checking PAN descriptor to select to prepare
The optimum channel of new network is established on it, if network layer management entity has found suitable channel, NLME can be at random
New network selects a PAN identifier, it can the network number of one specific ZigBee-network of identification.PAN descriptor determines
After good, network layer management entity will carry out relevant parameter configuration to network.After network parameter configures, network layer management entity
By calling MLME_START.request primitive that MAC layer is notified to start and running new network, and starting state is passed through into MLME_
START.confirm primitive notifies upper layer coordinator init state.So far new network has been successfully established by ZigBee coordinator.
After new group of networks is built up, this network can be added in ZigBee node.Child node is by calling NLME-NETWWORK-
The process of network is added to start for DISCOVERY.request primitive, and child node network layer will request MAC after receiving this primitive
Layer executes scanning actively or passively, and the suitable network of selection one executes the company of MAC layer from the beacon message that scanning obtains
Connect adition process.MAC layer once completes scanning will be by sending MLME-SCAN.confirm primitive informing network layer, network
Layer informs application layer by sending NLME-NETWORK-DISCOVERY.confurm primitive again.Application layer is receiving the primitive
Afterwards, NLME-JOIN.request primitive will be called, found network is added in selection, and child node has had been selected one at this time
A optimal upper layer node that network is added.Network layer will call MLME_ after determining suitable upper layer node
ASSOCIATE.request primitive requests MAC association to attempt that network is added by the father node, upper layer node passes through to MAC layer
MLME_ASSOCIATE.indication primitive notice network layer management entity has a node just to attempt that network, network is added
The neighbor table for searching for it is checked whether that the 64 Bits Expanding addresses that node matches are added with trial by layer management entity, with
Just determine whether the node is already present on its network.If there is matched extended address, network layer management entity obtains phase
16 network address and transmission one answered connect response to MAC layer.If without matched extended address, in upper layer node
Network layer management entity will distribute 16 nets to attempt the node being added under conditions of address allocation space exhausts not yet
Network address.If upper layer node address allocation space exhausts, request is added in refusal child node.When network is added in agreement child node
Request after, upper layer node network layer management entity will use be added node information a new item is generated in neighbor table,
And MAC layer successful connection is notified by MLME_ASSOCIATE.request primitive.Child node receives upper layer node transmission
Successful connection information will send a transmission success response message to confirm and receive, and then child node MAC layer will pass through calling
MLME_ASSOCIATE.confurm primitive notifies network layer, which contains in the net that upper layer node is child node distribution
Unique 16 network address, network layer management entity will be arranged neighbor table respective neighbor equipment and be its upper layer device, and lead to
NLME_JOIN.confirm primitive is crossed to notify upper layer node to be successfully joined network.Upper layer node receives child node
After networking success response information, MLME_COMM_STATUS.indication primitive will be passed through by the responsive state of transmission success
It is sent to network layer, network layer management entity notifies one, upper layer node by calling NLME_JOIN.indication primitive
Have been added to network.Building network flow chart such as Fig. 4.
Specific embodiment 2: illustrating present embodiment referring to Fig. 5, one kind described in present embodiment is based on wireless
The transformer local discharging on-line detecting method of sensor,
Data collection steps: using each state information of sensor acquisition transformer, the state information is electricity
Flow signal or voltage signal；Specifically, by software programming to the local discharge sensor of Wireless Sensor Network Terminal node
It is controlled, to realize the acquisition of the detection signal to partial discharge of transformer.
Data transmission step: the state information of acquisition is sent to host computer using ZigBee wireless communication protocol；
Detecting step: effective information, detecting state amount information are extracted from the data of acquisition using LabVIEW exploitation environment
In whether contain abnormal signal；
State judgment step: setting abnormal signal alarm threshold, backstage personnel extract data and analyze, when quantity of state is believed
When containing abnormal signal in breath, transfers abnormal signal and analyzed, finally show whether transformer has part based on the analysis results
Discharge defect.
According to above-mentioned specific embodiment as it can be seen that the invention has the following advantages that
(1) first by way of selecting wireless communication technique, ZigBee technology is selected as primary communications of the invention
Means are collected the Partial discharge signal of partial discharge sensor acquisition using wireless communication, give remote monitoring platform by network transmission.It utilizes
Monitor supervision platform realizes data transmission, has avoided that stroke distances are remote, personnel's long drive and human cost, material resources, financial resources
A large amount of wastes.
(2) low-power consumption, low data rate, low cost, low complexity may be implemented in the selected ZigBee technology of the present invention
Data communication requirement.Expand the covering model of communication distance and network by building star, tree-like or net form topological structure
It encloses, is very suitable to data acquisition, is the most commonly used wireless networking mode of automated wireless detection field.Utilize ZigBee technology
It realizes short-range data acquisition, realizes that remote monitor is maximum feature of the invention in conjunction with Internet technology.
(3) apply the present invention to the cumbersome work for avoiding cable distribution and laying in live detection, greatly mitigate
The workload of construction, and since data are by wirelessly being communicated, the use of cable is avoided, wiring conflict is reduced, it is real
Show and the region for being inconvenient to be routed has been monitored.
(4) present invention uses AES-128 Encryption Algorithm in data transmission procedure, can guarantee the confidentiality of data.And
The owned robustness of ZigBee wireless sensor network makes to be unlikely to cause whole network after certain node breaks down
Paralysis, while substantially increasing the reliability of network communication.In the environment of substation's strong electromagnetic, guarantee data transmission
Reliability.
Claims (7)
1. a kind of partial discharge of transformer on-line detecting system based on wireless sensor, which is characterized in that including with lower unit:
Data acquisition unit: using each state information of sensor acquisition transformer, the state information is electric current letter
Number or voltage signal；
Data transmission unit: the state information of acquisition is sent to host computer using ZigBee wireless communication protocol.
2. a kind of partial discharge of transformer on-line detecting system based on wireless sensor according to claim 1, special
Sign is that data transmission unit includes: multiple terminal nodes, multiple router nodes and a coordinator node；
Terminal node is used to drive each state information of sensor acquisition transformer and uploads the state information of acquisition
To router node,
Coordinator node wirelessly obtains state information from router node and sends supreme position machine.
3. a kind of partial discharge of transformer on-line detecting system based on wireless sensor according to claim 2, special
Sign is that coordinator node includes wireless communication module, power module and serial communication modular；
Power module is used to power for wireless communication module and serial communication modular,
Wireless communication module is used to wirelessly obtain state information from router node,
Serial communication modular is for state information to be sent in host computer from wireless communication module.
4. a kind of partial discharge of transformer on-line detecting system based on wireless sensor according to claim 3, special
Sign is that wireless communication module is CC2530 chip, and serial communication modular is SP3232 chip.
5. a kind of partial discharge of transformer on-line checking system based on wireless sensor according to 1 to 4 any claim
System, which is characterized in that sensor described in data acquisition unit is ultrasonic sensor and extra-high video sensor.
6. a kind of transformer local discharging on-line detecting method based on wireless sensor, which comprises the following steps:
Data collection steps: using each state information of sensor acquisition transformer, the state information is electric current letter
Number or voltage signal；
Data transmission step: the state information of acquisition is sent to host computer using ZigBee wireless communication protocol.
7. a kind of transformer local discharging on-line detecting method based on wireless sensor according to claim 6, special
Sign is, further includes:
Whether detecting step: containing abnormal signal in detecting state amount information,
State judgment step: when containing abnormal signal in state information, transferring abnormal signal and analyzed, and is tied according to analysis
Fruit judges whether current transformer state is abnormal.
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| CN110166142A (en) * | 2019-03-13 | 2019-08-23 | 华南理工大学 | A kind of method of rate control for realizing internal ultrasonic communication based on spread spectrum |
| CN112946438A (en) * | 2021-03-15 | 2021-06-11 | 哈尔滨理工大学 | Modularized wireless partial discharge detection device |
| CN113049035A (en) * | 2021-03-12 | 2021-06-29 | 辽宁工程技术大学 | Transformer state monitoring system based on Internet of things |
| CN113242614A (en) * | 2021-05-24 | 2021-08-10 | 慧感(上海)物联网科技有限公司 | Wireless ad hoc network system for complex pipe network environment and networking method thereof |
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Application publication date: 20190301 |