CN201327521Y - Online monitoring device of transformer - Google Patents
Online monitoring device of transformer Download PDFInfo
- Publication number
- CN201327521Y CN201327521Y CNU2008202145113U CN200820214511U CN201327521Y CN 201327521 Y CN201327521 Y CN 201327521Y CN U2008202145113 U CNU2008202145113 U CN U2008202145113U CN 200820214511 U CN200820214511 U CN 200820214511U CN 201327521 Y CN201327521 Y CN 201327521Y
- Authority
- CN
- China
- Prior art keywords
- unit
- circuit
- transformer
- power supply
- monitoring device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Small-Scale Networks (AREA)
Abstract
The utility model provides an online monitoring device of a transformer, which is composed of a power supply unit, a high-speed data collecting unit, CPUs (Central Processing Units), a communication unit and a display unit. A power signal of the transformer is input to the high-speed data collecting unit and is output after being converted into a digital signal. The CPUs which adopt a dual-CPU structure comprise an embedded processor and a DSP processor, the two CPUs are connected by a fast double-port ROM, the output end of the high-speed data collecting unit is connected with the input end of the DSP processor, the embedded processor is connected with the communication unit and the display unit, and the power supply unit provides power supply for each part of the device. The online monitoring device has the following advantages: the dual-CPU structure greatly improves the data-collecting and data-communication performances of the device; the plate-insertion type installation has convenient extended and interference-resisting capabilities; a wide-area transformer monitoring system can be built on the basis of an Ethernet bus, so as to learn the running conditions and performances of the transformers in different places in real time.
Description
Technical field
The utility model belongs to the transformer monitoring technical field, is a kind of transformer online monitoring device.
Background technology
High-power transformer is a most important equipment in the power transmission and transformation system, and the quality of its operation conditions directly influences the safe operation of system.In a single day transformer has an accident, and the direct and indirect economic loss that causes is huge.For a long time, the insulation status according to the gas chromatographic analysis result of preventive trial and oil dissolved gas judges transformer has played great role to preventing accident.But regular preventive trial fails to consider the actual state of equipment, too much maintenance and unnecessary shutdown may occur, can not in time find defective again.At transformer failure problems research and analysis over the years, find winding failure proportion maximum in transformer fault.Therefore, transformer is carried out on-line monitoring, diagnosing its insulation status and winding deformation degree at any time is very necessary with what avoid serious accident.
Summary of the invention
Problem to be solved in the utility model is: according to the operating position of existing transformer, transformer is carried out on-line monitoring, at any time diagnose its insulation status and winding deformation degree very necessary, need a kind of accurately monitoring device easily with the generation of avoiding serious accident.
The technical solution of the utility model is: the transformer online monitoring device, by power supply unit, the high-speed data acquisition unit, central processor unit, communication unit, display unit is formed, transformer electric power signal input high-speed data acquisition unit, convert digital signal output to, central processor unit is a dual-cpu structure, comprise flush bonding processor and dsp processor, realize connecting by quick twoport ROM between two CPU, the output of high-speed data acquisition unit connects the input of dsp processor, flush bonding processor connects communication unit and display unit, and the power supply of power supply unit generator each several part is supplied with.
The utility model is arranged in the cabinet, power supply unit, high-speed data acquisition unit, central processor unit, communication unit are the circuit board that four independent back bands patch groove, adopt the back of the body to insert the formula structure and be arranged in the cabinet, display unit is arranged on the front panel of cabinet.
The utility model high-speed data acquisition unit is made up of voltage changer, power pack, AD conversion chip, integrating circuit, follow circuit, operational amplification circuit, filtering block isolating circuit, multi-way switch gating circuit, the transformer electric power signal is successively behind voltage and current transducer, integrating circuit, follow circuit, operational amplification circuit, filtering block isolating circuit, multi-way switch gating circuit, import the AD conversion chip, pass to the dsp processor of central processor unit again via PCI Express bus.The central processor unit dual-cpu structure is flush bonding processor S3C44BOX and dsp processor TMS320LF2407.Communication unit comprises RS485 bus, industry ethernet and CAN bus.Power supply unit is made up of Switching Power Supply and power-switching circuit, provide+3.3V/1A ,+5V/1A ,+12V/0.1A ,-12V/0.1A ,+the 24V/0.1A direct current, each current supply circuit is separately over the ground.Display unit is made up of large-screen lc display module SMG240128A, 74HC138,74HC00,74HC573, and LCD MODULE SMG240128A is connected by 8 position datawires with flush bonding processor.
The utility model has the advantages that: dual-cpu structure has improved the data acquisition performance and the data communication performance of device greatly; Board plug type is installed has extended capability and antijamming capability easily; Can make up wide area transformer monitoring system based on industry ethernet, grasp strange land each transformer operation conditions and performance in real time.
Description of drawings
Fig. 1 is a connection layout between the utility model device unit.
Fig. 2 is the utility model power supply unit power-switching circuit figure.
Fig. 3 is the utility model high-speed data acquisition unit schematic diagram.
Fig. 4 is the utility model high-speed data acquisition unit A/D change-over circuit figure.
Fig. 5 is the workflow diagram of the utility model high-speed data acquisition unit.
Fig. 6 is the utility model communication unit RS485 circuit theory diagrams.
Fig. 7 is the utility model communication unit CAN bus system intelligent node hardware circuit principle figure.
Fig. 8 is the utility model communication unit CAN bus communication program flow diagram, and (A) initialization subroutine (B) sends subroutine, (C) receives subroutine.
Fig. 9 is the utility model communication unit ethernet circuit schematic diagram.
Figure 10 is the utility model communication unit ethernet communication program flow diagram, (a) the Data Receiving process flow diagram of data transmission flow figure (b) Ethernet of Ethernet.
Figure 11 is the utility model display unit Liquid Crystal Module interface circuit figure.
Figure 12 is a μ C/OS-II file architectural schematic among the flush bonding processor S3C44B0X of the utility model central processor unit.
Embodiment
The utility model is made up of power supply unit, high-speed data acquisition unit, central processor unit, communication unit, display unit, as Fig. 1, transformer electric power signal input high-speed data acquisition unit, convert digital signal output to, central processor unit is a dual-cpu structure, comprise flush bonding processor and dsp processor, realize communication-cooperation by quick dual port RAM between two CPU, the output signal input dsp processor of high-speed data acquisition unit, flush bonding processor connects communication unit and display unit, and the power supply of power supply unit generator each several part is supplied with.
Power supply unit comprises Switching Power Supply and power-switching circuit, provide+3.3V/1A ,+5V/1A ,+12V/0.1A ,-12V/0.1A ,+the 24V/0.1A direct current, each current supply circuit is independent respectively over the ground.Power-switching circuit such as Fig. 2, the voltage conversion circuit that+5V forms via low-pass filter circuit, de-noising circuit and voltage transitions chip is transformed to+3.3V, after the stabilivolt voltage stabilizing, give dsp processor TMS320LF2407 and related peripheral circuit supply again, + 5V gives flush bonding processor S3C44B0X and related peripheral circuit supply, + 12V/-12V gives operational amplifier TL082IP power supply, and+24V gives relay ST2-DC24V power supply.
When the high-speed data sampling unit is gathered the transformer electric power signal, because electric current, the voltage signal variation range of gathering are very big, for the precision that improves the A/D conversion and the resolution of sampling, the electric parameters signal is divided into two groups of large-signal and small-signals, adopt different electric current, voltage transformer (VT) to obtain, big electric current, voltage signal are obtained by hollow mutual inductor, and little electric current, voltage signal are obtained by mutual inductor unshakable in one's determination.Obtain sampled voltage and sample rate current signal from the voltage transformer (VT) summation current transformer of transformer primary side, secondary side, the voltage and current signal carries out the conversion post-sampling through installing inner high-accuracy voltage and current transducer respectively again, sampled signal is through integrating circuit, follow circuit, operational amplification circuit, filtering block isolating circuit, multi-way switch gating circuit, follow circuit is transformed into the ac voltage signal of certain amplitude and gives A/D converter, and concrete Acquisition Circuit as shown in Figure 3.Voltage and current amount after the conditioning converts digital quantity to through the AD7864-1 modulus conversion chip, the digital quantity that produces sends the dsp processor of CPU (central processing unit) to by PCI Express bus, for the numerical evaluation and the processing of voltage effective value, current effective value, winding impedance effective value are prepared.Concrete A/D change-over circuit is seen Fig. 4.High-speed data sampling unit sampling input voltage range of the present utility model is 0～500V, sampling input current scope is 0～100A, have two-forty, low-power consumption (only consuming 90mW), 4 road gather simultaneously, realize 12 high precision analogues conversions ,+characteristics such as the convenient power supply of 5V.The flow process of data acquisition as shown in Figure 5.After setting up task, the data acquisition task is started working, and gives the timer assignment according to specified sample frequency, has no progeny in timer, and generation is that the low pulse of 50ns gives CONVST as conversion starting signal with the width.A slice AD7864 keeps 4 channel sample simultaneously like this, and carries out the A/D conversion.After converting, produce an external interrupt and give CPU, start the respective interrupt service routine, carry out data read and preservation.
Central processor unit adopts dual-cpu structure, flush bonding processor S3C44B0X and dsp processor TMS320LF2407, TMS320LF2407 mainly realizes the processing of sampled data numerical evaluation, the inner μ C/OS-II of flush bonding processor real time operating system realizes multitasking functions such as signals collecting, communication function, failure wave-recording and logic determines, adopts quick twoport ROM to realize communication-cooperation between two CPU.
The transplanting of μ C/OS-II real time operating system and the realization of software design in the flush bonding processor: transplant and exactly an operating system is moved on certain microprocessor or microcontroller, because μ C/OS-II has taken into full account portability when design, so the migration process ratio is easier to.But need to transplant object and satisfy following requirement:
(1) the C compiler of processor can produce reenterable code;
(2) just can open and close interruption with the C language;
(3) the processor support is interrupted, and can produce regularly interruption (usually between 10 to 100Hz);
(4) the processor support can be held the hardware stack of a certain amount of data (may be several kilobyte);
(5) processor has instruction in storehouse or the internal memory is read and stored into to stack pointer and other CPU register.
The operating system file architecture as shown in figure 12, software section is made up of application program, system core code, configuration code and transplanting code 4 parts.Can find to transplant the μ C/OS-II needs relevant 3 file: OS_CPU.H, OS_CPU_A.S, OS_CPU_C.C are provided with processor.Mainly comprise following content:
(1) value (OS_CPU.H) of a constant is set with #define
(2) statement 10 data types (OS_CPU.H)
(3) with three grand (OS_CPU.H) of #define statement
(4) with C six functions of language compilation (OS_CPU_C.C)
(5) write four assembly language functions (OS_CPU_A.S)
Through top system transplantation work, a more complete real time operating system has been set up, and next is exactly to carry out writing of user application.Need to create user's oneself task in this part, mainly finish communication between each task by the message queue of system.Task comprises 5 tasks such as A/D sampling, serial communication, keyboard processing, LCD demonstration and idle task.Each task all is an independent small routine, can debug separately, helps the expansion on the function.When moving task wherein, think that this moment, the CPU control had this task to exclusively enjoy fully, task is infinite loop, will be suspended after the execution, is resumed when condition satisfies, and continues to carry out.
The utility model communication unit comprises three kinds of modes, is respectively RS485 bus, CAN bus, industry ethernet.
RS485 serial bus interface standard has the ability of very strong anti-common mode interference with difference balance mode transmission signals, allows that a transmitter drives a plurality of load equipments on a pair of twisted-pair feeder.Though what the RS485 interface adopted is the differential transfer mode, ability with certain anti-common mode interference, but the limit that surpasses the RS485 receiver when common mode voltage receives voltage, during promptly greater than+12V or less than-7V, receiver just again can't operate as normal, when serious even can burn chip and instrument and equipment.By the isolated from power of DC-DC with system power supply and RS485 transceiver; With Signal Spacing, thoroughly eliminate the influence of common mode voltage by optocoupler.The RS485 interface chip damages all might being subjected to the impact of static in transit of use, welding or equipment.Outdoor use occasion, interface chip and even total system also might cause the attack of thunder and lightning.Because signal can produce electromagnetic interference (EMI) and end reflection in transmission course, make useful signal and invalid signals mutual superposition on transmission line again, when serious communication can't normally be carried out.The communicating circuit that adopts Max1482EPD to form well solves these problems, the design of Driver of chip becomes limit slope mode, make that the output signal edge is little wanted suddenly, being unlikely the too much high fdrequency component of generation on transmission line, thereby control the generation of interference effectively.Concrete RS485 circuit theory diagrams are seen Fig. 6.
The utility model CAN bus adopts S3C44B0X as microprocessor, in the CAN bus communication interface, adopts the SJA1000 and the 82C250 chip of PHILIPS company.SJA1000 is independent CAN communication controler, and 82C250 is a high-performance CAN bus transceiver.Be illustrated in figure 7 as CAN bus system intelligent node hardware circuit principle figure.As can be seen from the figure, circuit mainly is made of four parts: microcontroller S3C44B0X, independent CAN communication controler SJA1000, CAN bus transceiver 82C250 and high-speed photoelectric coupler 6N137.Microprocessor S3C44B0X is responsible for the initialization of SJA1000, realizes communication tasks such as the reception of data and transmission by control SJA1000.AD0～AD7 of SJA1000 is connected to the P0 mouth of S3C44B0X, and CS is connected to the P2.0 of S3C44B0X, and P2.0 is that SJA1000 can be chosen in 0 o'clock CPU sheet data file address, and CPU can carry out corresponding read-write operation to SJA1000 by these addresses.The RD of SJA1000, WR, ALE link to each other with the corresponding pin of S3C44B0X respectively, and INT meets the INT0 of S3C44B0X, and S3C44B0X also can visit SJA1000 by interrupt mode.In order to strengthen the antijamming capability of CAN bus node, the TX0 of SJA1000 is not directly to link to each other with RXD with the TXD of S3C44B0X with RXO, but link to each other with S3C44B0X by behind the high speed photo coupling 6N137, so just well realized the internodal electrical isolation of each CAN on the bus.Two power supply VCC and VDD that the optocoupler partial circuit is adopted isolate fully.The switch power module that adopts the small-power power isolation module or be with a 5V to isolate output more of isolating fully of power supply is realized.Improve the stability and the security of node.Safety and interference protection measure are adopted in the interface section of 82C250 and CAN bus.The CANH of 82C250 links to each other with the CAN bus by the resistance in one 5 Europe separately with the CANL pin, and resistance can play certain metering function, and protection 82C250 avoids the impact of overcurrent.The little electric capacity of two 30P in parallel between CANH and CANL and the ground can play the high frequency interference on the filtering bus and the ability of certain anti-electromagnetic radiation.In addition between two CAN bus incoming ends and ground respectively reversal connection a protection diode, when the CAN bus has higher negative voltage, can play certain overvoltage protection effect by the short circuit of diode.Be connected to a slope resistance on the Rs pin of 82C250, resistance sizes can suitably be adjusted according to bus communication speed, between general 16K～140K.
The communication flow of CAN bus communication mainly comprises three parts: CAN node initializing, message send and message receives.
(1) initialization
The initialization of SJA1000 only just can be carried out under reset mode, and initialization mainly comprises the setting of the setting of working method, the mode that accepts filter, the setting that receives mask register (AMR) and reception code register (ACR), the setting of baud rate parameter and interrupts allowing being provided with of register (IER) etc.After the initialization of finishing SJA1000 was provided with, SJA1000 just can get back to duty, carried out normal communication task.Initialization flowchart is seen Fig. 8 (A).
(2) message sends
Send the transmission of subroutine responsible node message.The user only need be combined into a frame message by specific format with data to be sent during transmission, sends into SJA1000 and sends in the buffer area, starts the SJA1000 transmission then and gets final product.Before delivering newspaper literary composition, must do some judgements earlier toward SJA1000 transmission buffer area.Two kinds of router branch transmission remote frame and Frames, remote frame no datat field.Send subroutine flow chart and see Fig. 8 (B).
(3) message receives
The reception and other situation that receive subroutine responsible node message are handled.It is more complicated than sending subroutine to receive subroutine, because in handling the process that receives message, will handle situation such as overflow such as bus disengaging, false alarm, reception simultaneously.The reception of SJA1000 message mainly contains dual mode: interrupt receive mode and inquiry receive mode, the utility model adopts and interrupts receive mode.Receive subroutine flow chart and see Fig. 8 (C).
Under the international standard IEC61850 of power telecommunication network network and system promoted, Ethernet had become the standard (IEEE 802.3) of communication network in the electric system; Therefore, with ethernet communication as the external main communication mode of this device.The ethernet controller of this device adopts the third generation Fast Ethernet control chip RTL8019 of Realtek company, it supports Ethernet II and IEEE802.3 standard, embedded 16Kbit SRAM, can realize that on twisted-pair feeder 10Mbps transmits and receive data simultaneously by Ethernet switch, have 16 position datawire interfaces and 20 bit address line interfaces, support 8 or 16 s' data pattern, support wire jumper and two kinds of patterns of wire jumper free, support the interrupt request of 8 circuits, support 3 kinds of reference power supply " shut " mode"s.The ethernet communication circuit theory diagrams that the RTL8019 chip constitutes, as shown in Figure 9.Adopt wire jumper working method (I/O and the interruption that are network interface card are determined by wire jumper); The JP pin connects high level, selects 16 bit data bus; The S3C44B0X processor is controlled and is also realized reading of data by register address and storage address that 4 address wire A0～A3 selects RTL8019; The pin of indication network card status is connected to Green/Red LED, is convenient to intuitive judgment ethernet communication state; (PSD4235G2) controls the chip selection signal of RTL8019 by programmable logic device (PLD).The RTL8019 Ethernet chip can not work independently, and also must have a network transformer to carry out level conversion in the middle of RJ-45 interface and RTL8019.
The framework of whole Ethernet interface driver can be divided into 4 layers, and be respectively protocol interface layer, network device interface layer from top to bottom, the device driver functionality layer of actual functional capability is provided, and the network equipment and network media layer.This framework has been put up in the uC/TCP-IP of uC/OS II protocol package, and the groundwork that do is exactly the ardware feature according to ethernet controller RTL8019, finishes the function of device drives, mainly is divided into following three parts:
(1) Ethernet interface initialization
The initialization first step is the Ethernet interface that resets.Resetting of Ethernet interface is divided into hardware reset and software reset.Hardware reset is put low level by the RST pin of giving RTL8019 and is resetted, and the software reset resets by the ResetPort mouth being write sign, it should be noted that it must be hardware reset that Ethernet resets for the first time.Second step of initialization is the initial value that register is set, the physical address of this device Ethernet is saved in the register, and the register of RTL8019 carried out initial configuration, thereby utilize uC/OS II to be the data-transformation facility interface that the network equipment provided, realize the data transmission of special-purpose network interface card.
(2) packet sends
The process of transmitting of data is shown in Figure 10 (a), and when sending data, at first data are copied the system buffer of kernel mode from user's attitude by the data-interface of the network equipment, and the transmission interface by RTL8019 sends data again.UC/OSII is in task scheduling or when system call is returned, and scheduler program judges whether to be activated.Judge then whether write queue has request.Have then and give the other side task, after confirmation signal arrives, request is removed data.If what data sent the back response is re-transmitted signal, then further handle according to a preconcerted arrangement.The next request of re-treatment is empty until request queue, and sending successfully, back release takes up space and the destruction task.If queue empty and have process sleep then to wake the sleep task up.
(3) packet receives
The receiving course of data is shown in Figure 10 (b), and when receiving, the equipment interface by RTL8019 receives data in the system buffer, by network device interface data is transmitted in the user buffering district again.When data are received, activate interrupt service subroutine, interrupt service subroutine reads in data queue with data, then wake this transmission task up if read sleeping process, simultaneously the data that arrive are carried out verification, data are correctly then beamed back signal, otherwise beam back re-transmitted signal.The interruption removing interrupt identification that finishes, and discharge stack space and destruction task, make afterwards peer and low level interrupts to respond.
Display unit is made up of large-screen lc display module SMG240128A, 74HC138,74HC00,74HC573, LCD MODULE SMG240128A and flush bonding processor S3C44B0X interface adopt the parallel input and output of 8 position datawires and 8 control lines, and RD, WR are generated the read-write enable signal by logical combination.A0, A1 are connected respectively to CS1, CS2 pin, four control signals are mapped on the address space of S3C44B0X, make things convenient for writing of program.Generate chip selection signal with 74HC138, convenient other peripheral chips that expand later on.Chip of LCD adopts professional liquid crystal display silicon to create the ST7920 of company, LCD MODULE contains Chinese character base, accelerate writing of liquid crystal program, can realize showing letter, numeric character, Chinese font and custom images, can realize that by adjustable resistance the brightness and contrast regulates, output type can be realized dot matrix output, text output, figure output.Liquid Crystal Module interface circuit figure sees Figure 11.
Because can there be strong electromagnetic pollution in each intermodule, these pollution source comprise harmonic wave and the electromagnetic radiation in superpotential and the main line switching process and the x radiation x of vacuum switch, the electromagnetic radiation of driver circuit etc. on the main line, so must be noted that jamproof protection when design.The raising anti-jamming capacity can design two aspects from hardware and software and be improved.
(1) hardware anti-interference: the utility model is arranged in the cabinet, power supply unit, high-speed data acquisition unit, central processor unit, communication unit are the circuit board that four independent back bands patch groove, adopting the back of the body to insert the formula structure is arranged in the cabinet, display unit is arranged on the front panel of cabinet, installation has extendability easily like this, also is easy to be provided with anti-interference protective materials; Prophylactico-therapeutic measures for electromagnetic pollution source comprises electromagnetic screen, reduce loop area and the sudden change of voltage or electric current is cushioned etc.The main pathway of electromagnetic interference (EMI) comprises the coupling in electric field, magnetic field and the conduction of circuit, so electromagnetic screen and filtering are mainly taked in the electromagnetic interference (EMI) measure of driver.
(2) Software Anti-interference: the precision of signals collecting and the real-time of processing are to improve the prerequisite that intelligent control unit is realized accurately judgement and action, yet signals collecting is subjected to such environmental effects very big; Utilize wavelet transformation technique sampled signal to be handled, can improve the antijamming capability of system in conjunction with improvement type fourier algorithm and artificial intelligence.
Claims (7)
1, the transformer online monitoring device, it is characterized in that by power supply unit, the high-speed data acquisition unit, central processor unit, communication unit, display unit is formed, transformer electric power signal input high-speed data acquisition unit, convert digital signal output to, central processor unit is a dual-cpu structure, comprise flush bonding processor and dsp processor, connect by quick twoport ROM between two CPU, the output of high-speed data acquisition unit connects the input of dsp processor, flush bonding processor connects communication unit and display unit, and the power supply of power supply unit generator each several part is supplied with.
2, transformer online monitoring device according to claim 1, it is characterized in that device is arranged in the cabinet, power supply unit, high-speed data acquisition unit, central processor unit, communication unit are the circuit board that four independent back bands patch groove, adopt the back of the body to insert the formula structure and be arranged in the cabinet, display unit is arranged on the front panel of cabinet.
3, transformer online monitoring device according to claim 1 and 2, it is characterized in that the high-speed data acquisition unit is by voltage changer, power pack, the AD conversion chip, integrating circuit, follow circuit, operational amplification circuit, the filtering block isolating circuit, the multi-way switch gating circuit is formed, the transformer electric power signal is successively through the voltage and current transducer, integrating circuit, follow circuit, operational amplification circuit, the filtering block isolating circuit, behind the multi-way switch gating circuit, import the AD conversion chip, pass to the dsp processor of central processor unit again via PCI Express bus.
4, transformer online monitoring device according to claim 1 and 2 is characterized in that the central processor unit dual-cpu structure is flush bonding processor S3C44B0X and dsp processor TMS320LF2407.
5, transformer online monitoring device according to claim 1 and 2 is characterized in that communication unit comprises RS485 bus, industry ethernet and CAN bus.
6, transformer online monitoring device according to claim 1 and 2 is characterized in that power supply unit is made up of Switching Power Supply and power-switching circuit, and each current supply circuit separately over the ground.
7, transformer online monitoring device according to claim 1 and 2, it is characterized in that display unit is made up of large-screen lc display module SMG240128A, 74HC138,74HC00,74HC573, LCD MODULE SMG240128A is connected by 8 position datawires with flush bonding processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202145113U CN201327521Y (en) | 2008-12-19 | 2008-12-19 | Online monitoring device of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202145113U CN201327521Y (en) | 2008-12-19 | 2008-12-19 | Online monitoring device of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201327521Y true CN201327521Y (en) | 2009-10-14 |
Family
ID=41179490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202145113U Expired - Fee Related CN201327521Y (en) | 2008-12-19 | 2008-12-19 | Online monitoring device of transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201327521Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102025126A (en) * | 2011-01-19 | 2011-04-20 | 广东省电力设计研究院 | Relay protection method of transformer as well as system thereof |
| CN102565524A (en) * | 2012-03-15 | 2012-07-11 | 江苏省电力公司常州供电公司 | Real-time monitoring method for short-circuit current of near zone of transformer |
| CN103792424A (en) * | 2012-10-30 | 2014-05-14 | 水利部农村电气化研究所 | Electric energy meter having energy-saving function and application |
| CN102565524B (en) * | 2012-03-15 | 2016-11-30 | 江苏省电力公司常州供电公司 | Real-time monitoring method for short-circuit current of near zone of transformer |
| CN107144746A (en) * | 2017-05-11 | 2017-09-08 | 句容市江电电器机械有限公司 | Transformer's Condition Monitoring and fault diagnosis system |
| CN109752628A (en) * | 2019-01-15 | 2019-05-14 | 国网辽宁省电力有限公司鞍山供电公司 | A kind of multifunctional mutual-inductor polarity test instrument based on embedded RTU |
| CN110351257A (en) * | 2019-06-27 | 2019-10-18 | 绿漫科技有限公司 | A kind of distribution Internet of Things safety access system |
| CN111257678A (en) * | 2020-03-02 | 2020-06-09 | 山东电力设备有限公司 | Transformer running state monitoring terminal and monitoring method |
| CN111431026A (en) * | 2020-05-07 | 2020-07-17 | 苏州科韵激光科技有限公司 | Laser equipment and control method thereof |
| CN114124590A (en) * | 2021-11-26 | 2022-03-01 | 交控科技股份有限公司 | Safety circuit, communication method and device applied to Ethernet communication equipment |
| US11835568B2 (en) | 2020-11-18 | 2023-12-05 | General Electric Company | Systems and methods for monitoring and diagnosing power system assets |
-
2008
- 2008-12-19 CN CNU2008202145113U patent/CN201327521Y/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102025126B (en) * | 2011-01-19 | 2014-05-21 | 中国能源建设集团广东省电力设计研究院 | Relay protection method of transformer as well as system thereof |
| CN102025126A (en) * | 2011-01-19 | 2011-04-20 | 广东省电力设计研究院 | Relay protection method of transformer as well as system thereof |
| CN106291084B (en) * | 2012-03-15 | 2019-03-15 | 江苏省电力公司常州供电公司 | A kind of power transformer near region short circuit monitoring method |
| CN102565524B (en) * | 2012-03-15 | 2016-11-30 | 江苏省电力公司常州供电公司 | Real-time monitoring method for short-circuit current of near zone of transformer |
| CN106291084A (en) * | 2012-03-15 | 2017-01-04 | 江苏省电力公司常州供电公司 | A kind of power transformer near region short circuit monitoring method |
| CN106291085A (en) * | 2012-03-15 | 2017-01-04 | 江苏省电力公司常州供电公司 | Short-circuit current of near zone of transformer monitoring method |
| CN102565524A (en) * | 2012-03-15 | 2012-07-11 | 江苏省电力公司常州供电公司 | Real-time monitoring method for short-circuit current of near zone of transformer |
| CN106291085B (en) * | 2012-03-15 | 2019-04-02 | 江苏省电力公司常州供电公司 | Short-circuit current of near zone of transformer monitoring method |
| CN103792424A (en) * | 2012-10-30 | 2014-05-14 | 水利部农村电气化研究所 | Electric energy meter having energy-saving function and application |
| CN107144746A (en) * | 2017-05-11 | 2017-09-08 | 句容市江电电器机械有限公司 | Transformer's Condition Monitoring and fault diagnosis system |
| CN109752628B (en) * | 2019-01-15 | 2024-03-19 | 国网辽宁省电力有限公司鞍山供电公司 | Multifunctional mutual inductor polarity tester based on embedded RTU |
| CN109752628A (en) * | 2019-01-15 | 2019-05-14 | 国网辽宁省电力有限公司鞍山供电公司 | A kind of multifunctional mutual-inductor polarity test instrument based on embedded RTU |
| CN110351257A (en) * | 2019-06-27 | 2019-10-18 | 绿漫科技有限公司 | A kind of distribution Internet of Things safety access system |
| CN111257678B (en) * | 2020-03-02 | 2022-03-08 | 山东电力设备有限公司 | Transformer running state monitoring terminal and monitoring method |
| CN111257678A (en) * | 2020-03-02 | 2020-06-09 | 山东电力设备有限公司 | Transformer running state monitoring terminal and monitoring method |
| CN111431026A (en) * | 2020-05-07 | 2020-07-17 | 苏州科韵激光科技有限公司 | Laser equipment and control method thereof |
| US11835568B2 (en) | 2020-11-18 | 2023-12-05 | General Electric Company | Systems and methods for monitoring and diagnosing power system assets |
| CN114124590A (en) * | 2021-11-26 | 2022-03-01 | 交控科技股份有限公司 | Safety circuit, communication method and device applied to Ethernet communication equipment |
| CN114124590B (en) * | 2021-11-26 | 2023-07-21 | 交控科技股份有限公司 | Safety circuit applied to Ethernet communication equipment, communication method and equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201327521Y (en) | Online monitoring device of transformer | |
| CN101261297B (en) | Electric power transformer windings parameter on-line real-time identification device and method | |
| CN104698923B (en) | EMUs supplementary controlled system | |
| CN201184898Y (en) | On-line real-time identification apparatus for winding parameter of power transformer | |
| CN201540330U (en) | Digital multifunctional network electrical measuring instrument | |
| CN204856878U (en) | Embedded M -BUS intelligence concentrator | |
| CN108808854A (en) | A kind of electric distribution network data collection terminal based on intelligent terminal | |
| CN101231526A (en) | Distributed monitoring system for running state of induction machine | |
| CN106598897A (en) | Industry bus system self-adaptive to three industry bus protocols and conversion method | |
| CN202735787U (en) | Electric power information machine room environment real-time monitoring system | |
| CN105720690A (en) | Intelligent circuit breaker communication networking system | |
| CN201312143Y (en) | Measuring and control terminal of signal power supply | |
| CN202042031U (en) | Electric fire hazard monitoring device based on controller area network (CAN) bus | |
| CN106602726A (en) | Power efficiency monitoring terminal and method thereof | |
| CN104467164B (en) | Dual-power-supply input data acquisition terminal | |
| CN201477418U (en) | Microcomputer protection measuring and controlling device | |
| CN206515666U (en) | Ship failure wave-recording harvester | |
| CN206460454U (en) | The serial ports instrument that a kind of achievable different types of data is mutually changed simultaneously | |
| CN205091797U (en) | Architectural energy consumption concentrates supervisory systems based on cloud computing technology | |
| CN202126748U (en) | Safety and protective data acquisition unit | |
| CN201374722Y (en) | Multi-serial port dual-Ethernet networked server | |
| CN201163783Y (en) | Multi-serial port card based on CAN bus | |
| CN201345391Y (en) | Control panel system used in electric automobile battery charger | |
| CN205565900U (en) | Intelligence circuit breaker communication networking system | |
| CN113311776A (en) | Control device and system of intelligent zone controller applied to monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091014 Termination date: 20111219 |