CN101110525A - Distributing transformer monitoring terminal set and use thereof - Google Patents
Distributing transformer monitoring terminal set and use thereof Download PDFInfo
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- CN101110525A CN101110525A CNA2006100365542A CN200610036554A CN101110525A CN 101110525 A CN101110525 A CN 101110525A CN A2006100365542 A CNA2006100365542 A CN A2006100365542A CN 200610036554 A CN200610036554 A CN 200610036554A CN 101110525 A CN101110525 A CN 101110525A
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Abstract
The present invention relates to a power distribution and transformation monitoring terminal and its purpose belonging to the technical field of transformer monitoring equipment, which is suitable for operation monitoring of public transformers, special transformers and power distribution lines and is arranged on one side of a power transformer and comprises a CPU module, a power source sampling module, a modem module and a display module connected with each other. An input terminal of the CPU module is connected with an output terminal of the power source sampling module. An input terminal of the display module is connected with an output terminal of the CPU module. An output terminal of the CPU module can transmit operation data to a power distribution and transformation monitoring back-end through RS232 and RS485 communication line, the modem, a mobile network and a wire or wireless meter reading equipment. A high-speed microprocessor unit realizes scale conversion, greatly reduces complexity of peripheral circuits and collects and judges operation date of the power transformer detecting terminal device, thus ensuring lower cost and high performance/price ratio.
Description
Technical field
The present invention relates to a kind of distribution transformer monitoring terminal installation and uses thereof, be applicable to that the operation of common transformer, dedicated transformer and some distribution lines detects.Belong to the transformer control equipment technical field.
Background technology
Distribution transformer is a power equipment of electric energy directly being distributed to low-voltage customer, and its service data is the important component part of whole power distribution network basic data.In urban and rural power grids, along with the raising of resident living level, it is increasing that resident load accounts for the ratio of total load, and the resident is also more and more higher to the requirement of power supply quality (as rate of qualified voltage, frequency etc.), power supply reliability.Power supply enterprise must accomplish the present situation of resident load and to know what's what when carrying out planning and designing, industry expand apply to install, new user starts to exchange fire, the daily planning of system's increase-volume, transformer cloth point selection or the like must have science foundation.Concerning the production division of power supply enterprise, the supervision of device security is the primary goal of its concern.The economical operation of system is one of economic benefit source of electric power enterprise.Because around the transformer all is the higher-pressure region, there is certain danger, transformer generally is installed in from community place far away, staff and power supply department all can not be understood its operating state before transformer breaks down, and prior art is very backward to the monitoring of transformer running status, though some transformer monitoring device has also used digital module or intelligent apparatus, and general circuit structure complexity, function singleness, with high costs.
Summary of the invention
The purpose of this invention is to provide a kind of distributing transformer monitoring terminal set, monitoring terminal is to be installed on a kind of data acquisition equipment of distribution transformer side.Adopt the high speed microprocessor unit to realize the stipulations conversion, reduced complexity of peripheral circuits greatly, and the service data of power transformer detecting terminal device gathered and judge, whether, dead electricity whether out-of-limit as current/voltage etc. and monitoring distribution transforming oil temperature be unusual, and can data analysis be provided to the monitoring backstage transfer of data that collects by short-distance wireless meter reading method or mobile communication network, input cost is lower, the cost performance height.
Technical scheme of the present invention:
A kind of distributing transformer monitoring terminal set, this device is installed on the distribution transformer side, its design feature is: be formed by connecting by CPU module, power supply sampling module, modem module, display module, an input of CPU module is connected with the output of power supply sampling module, the input of display module connects an output of CPU module, and an output of CPU module can be dealt into distribution transforming monitoring backstage by mobile network and wired, radio meter register equipment with service data with data by RS232, RS485 telecommunication circuit, modulator-demodulator.
Described CPU module mainly is made up of master control chip, clock control part, storage area, switch acquisition part, pulse output and communicating circuit.
Described master control chip adopts 16 bit processors, and its chip integration has become A/D, and modules such as LCD driving have been simplified peripheral circuit greatly, have effectively reduced the exploitation input cost.
Described master control chip is by detecting the method calculated rate of voltage zero-cross, saved complicated phase-locked loop circuit, the sampled level signal is carried out exporting to display module after A/D handles, and by to three-phase voltage, the electric current of low-pressure side, sampling obtains electric current and voltage and gets instantaneous value, by certain algorithm (integral algorithm), just can obtain correspondent voltage, current effective value, apparent power, meritorious, idle, power factor, active energy, reactive energy; About harmonic wave, be imbued with the time at CPU and calculate by DFT.The data that calculate are kept in the storage chip, treat after the user checks meter the importing backstage of data integrity to be analyzed data.
Described power supply sampling module comprises power unit and sampling section, the power supply sampling module is responsible for the conversion of whole monitor terminal power supply and outside sampled signal, monitor terminal is that three-phase and four-line inserts, on handling, adopts power supply the structure of 6 rectifier bridge heap circuit design, and obtain the internal work power supply of three power supplys of 12V of direct current 3.75V and direct current 5V and the output of bridge heap circuit as distribution transformer terminals by voltage-stabilizing device, guaranteed that independent one can make the device operate as normal mutually.
Described voltage and current sample convert thereof into level signal by the PT on the power module, CT loop and deliver to and carry out the A/D sampling processing on the CPU module.
Clock control part (with the crystal oscillator of 32.768K) initialization was interrupted secondary in one second, and accurate timing is used for real-time clock.The clock backup battery is used for providing uninterrupted power supply to clock chip;
Switch acquisition partly is that the external switch amount is gathered by light-coupled isolation, can differentiate the operational mode of transformer according to the signal of switching value.
The pulse output is that active electrical degree and idle electric degree that device calculates are exported to the measuring accuracy use of gauge table platform as the test distribution transformer terminals by pulse, and device is supported 645 stipulations, can test on the multifunctional meter platform that more generally uses at present.
Communicating circuit comprises 232 telecommunication circuits and 485 telecommunication circuit parts, be used for the smart machine of monitor terminal outside and the conversion of signals between the master control chip by 232 level transferring chip and 485 level transferring chip respectively, the middle optocoupler that adopts carries out Signal Spacing to it.
The purposes of distributing transformer monitoring terminal set is that distributing transformer monitoring terminal set is installed on the distribution transformer side, the input of power supply sampling module connects the output of distribution transforming, output connects an input of CPU module, the CPU module is finished following work: the three-phase voltage of analyzing the input of power supply sampling module, electric current, meritorious, idle, frequency, phase angle change, power factor, three-phase voltage, the total percent harmonic distortion of electric current, 3-15 voltage of three-phase, electric parameters such as current harmonics component ratio, determine the real-time loading condition of transformer, oil tender feeling condition, failure logging etc., statistic record:
1) integral point data such as each loop three-phase voltage every day, three-phase current, three phases active power, three phase reactive power, apparent power, three-phase activity coefficient, harmonic parameters, frequency, meritorious electric weight and capacity of idle power;
2) each loop voltage every day, current maxima, minimum value and time of occurrence thereof, maximum, minimum value and the time of occurrence thereof of meritorious, reactive power, power factor; Statistic record every month, day meritorious electric weight and capacity of idle power; The cumulative time of the statistics super upper limit of voltage every day and super lower limit; Each is 15 minutes lowest high-current values and time mutually; The three-phase imbalance rate is greater than time of 25%; Power factor is greater than 0.9 time that reaches less than 0.8;
3) overvoltage, under-voltage, phase shortage, harmonic voltage transfinite, have a power failure constantly, incoming call constantly, accumulative total interruption duration, three-phase imbalance electric current incident such as transfinite.
Other function of distribution transformer monitoring terminal:
Record data hold function:, can preserve 100 days all kinds of record data for the single loop device.Reliably the holding time reaches 10 years to the data that write down after the power down.
Auto restore facility: device has power-on self-test and house dog (watchdog) function, when device occurs unusual or crashes, can restart voluntarily.
Presentation Function: adopt big Chinese character liquid crystal to add the man-machine interaction mode of keyboard, menu in Chinese, man-machine interface close friend, convenient operating maintenance.Panel has operating state to show, meritorious and capacity of idle power pulse indication.
Communication function: device has independent standard RS232, RS485 communication interface, and configurable close range wireless communication module can be checked meter by PDA or meter-copy device by serial ports or wireless module.
Configurable GPRS, telephone network (PSTN), CDMA, Nuo Te net etc. are realized telecommunication.
Conveniently with the electrical power distribution automatization system interface.
Communications protocol is followed national standard, supports enterprise's stipulations and 101 stipulations.
Communication baud rate 1200-19200bps is optional.Also can be up to 57600 by user's request.
The present invention has following outstanding advantage
1. the digitlization of the equipment of realization terminal, integrated, networked.
Because the present invention includes power supply sampling module, switch acquisition part, modem module etc., adopted A/D integrated, high speed 16 bit processors of LCD driver module carry out data processing to the data that collect, and data are sent to the monitoring backstage, thereby can realize the digitlization, integrated, networked of the equipment of terminal by multiple transmission mode.
2. adopt the communicating circuit that comprises RS232 and RS485 to realize the telecommunication networking with the mobile GPRS outside the external communication of bus mode, telephone network (PSTN), CDMA, Nuo Te net etc., and data flow monitored in real time, the multistation management, utilize network to carry out telecommunication administration, and will write down, memory contents is given to the far-end main website.Device has been realized concentrated monitoring, the protection of transformer, anywhere, any way online all can carry out operational management and monitoring, overcomes ambient weather, unfavorable factors such as place dispersion.
Description of drawings
Fig. 1 is a structured flowchart of the present invention;
Fig. 2 is CPU module principle figure;
Fig. 3 is a power supply sampling module schematic diagram;
Fig. 4 is a rectifier bridge heap circuit design drawing;
Fig. 5 is PT, CT loop circuit figure;
Fig. 6 is RS232 and RS485 communicating circuit figure;
Fig. 7 is the switch acquisition circuit diagram.
Among the figure: CPU module 1, power supply sampling module 2, modem module 3, display module 4, master control chip 11, clock control part 12, storage area 13, switch acquisition part 14, pulse output 15 and communicating circuit 16.
Embodiment
Specifically describe this enforcement is novel below in conjunction with specific embodiment.
A kind of distributing transformer monitoring terminal set, its structured flowchart as shown in Figure 1, comprise CPU module such as Fig. 2, the power supply sampling module, modem module and wireless module 3, display module 4 is formed by connecting, an input of CPU module 1 is connected with the output of power supply sampling module 2, the input of display module 4 connects an output of CPU module 1, and an output of CPU module 1 can be by RS232 and RS485 communicating circuit such as Fig. 6, modem module 3 with data by mobile network and wired, radio meter register equipment is dealt into distribution transforming monitoring backstage with service data.CPU module 1 is connected with three-phase voltage, power transformer by power supply sampling module 2, power supply sampling module 2 as shown in Figure 3, adopt rectifier bridge heap circuit structure and voltage-stabilizing device to export three DC power supply as the terminal inner working power, rectifier bridge heap circuit structure as shown in Figure 4; Power supply sampling module 2 adopts PT, CT loop that voltage, current conversion are become level signal input CPU module, and PT, CT loop circuit are as shown in Figure 5.
The power supply sampling module comprises power unit and sampling section, power supply sampling module 2 is responsible for the collection and the conversion of whole monitor terminal working powers and outside sampled signal, and power supply sampling module 2 is gathered three-phase voltages, electric current, meritorious, idle, frequency, phase angle change, power factor, three-phase voltage, the total percent harmonic distortion of current/voltage, 3-15 voltage of three-phase, current harmonics component and electric parameter such as compared and deliver CPU module 1; CPU module 1 is mainly by master control chip 11, clock control part 12, storage area 13, switch acquisition part 14, pulse output 15 and communicating circuit 16 are formed, the electric parameter that 1 pair of power supply sampling module 2 of CPU module is delivered carries out computational analysis, the master control chip is by detecting the method calculated rate of voltage zero-cross, thereby saved complicated phase-locked loop circuit, the sampled level signal is carried out exporting to display module after A/D handles, and by three-phase voltage to low-pressure side, electric current, sample and obtain the instantaneous value of electric current and voltage, by certain algorithm (integral algorithm), obtain correspondent voltage, current effective value, apparent power, meritorious, idle, power factor, active energy, reactive energy; About harmonic wave, calculate by DFT in the CPU module; The data that calculate are kept in the storage chip, treat after the user checks meter the importing backstage of data integrity to be analyzed data; Switch acquisition circuit wherein as shown in Figure 7, the external switch amount is gathered by light-coupled isolation, differentiate the operational mode of transformer according to the signal of switching value, the GPRS that is checked meter by PDA or meter-copy device by serial ports or modulator-demodulator wireless module 3 then or pass through to dispose, telephone network (PSTN), CDMA, Nuo Te net etc. are realized telecommunication, give the far-end main website with recorded information.Stored information can be preserved 100 days all kinds of record data for the single loop device, and reliably the holding time reaches 10 years to the data that write down after the power down.
The purposes of this distributing transformer monitoring terminal set mainly is: analyze the parameters of determining transformer, statistic record:
1) integral point data such as each loop three-phase voltage every day, three-phase current, three phases active power, three phase reactive power, apparent power, three-phase activity coefficient, harmonic parameters, frequency, meritorious electric weight and capacity of idle power;
2) each loop voltage every day, current maxima, minimum value and time of occurrence thereof, maximum, minimum value and the time of occurrence thereof of meritorious, reactive power, power factor; Statistic record every month, day meritorious electric weight and capacity of idle power; The cumulative time of the statistics super upper limit of voltage every day and super lower limit; Each is 15 minutes lowest high-current values and time mutually; The three-phase imbalance rate is greater than time of 25%; Power factor is greater than 0.9 time that reaches less than 0.8;
3) overvoltage, under-voltage, phase shortage, harmonic voltage transfinite, have a power failure constantly, incoming call constantly, accumulative total interruption duration, three-phase imbalance electric current incident such as transfinite.
Be the important technological parameters of this distribution transformer monitoring terminal below:
The electric flux accuracy class: meritorious 1 grade, idle 2 grades.
Reference voltage: 3 * 100V, 3 * 220V/380V.
Reference frequency: 50Hz/60HZ.
Current specification: 5 (6) A.
Operating voltage range: 0.8Un～1.2Un, maximal work voltage range: 0.7Un～1.3Un.
Starting current: meritorious 0.002In (1 grade), idle 0.003In (2 grades).
Shunt running: have anti-shunt running logical design.
This machine power consumption :=3VA.
The main performance index of monitoring terminal
Voltage accuracy: ± 0.5%.
Current precision: ± 0.5%.
Power factor precision: ± 0.5%.
Active power precision: ± 1.0%.
Reactive power precision: ± 1.0%.
Clocking error: every day is less than 1s.
The back time data memory has a power failure: 10 years.
Mean Time Between Failures: greater than 50000 hours.
Electricity surpasses 1,000,000 degree back return-to-zero.
Claims (10)
1. distributing transformer monitoring terminal set, it is characterized in that being formed by connecting by CPU module (1), power supply sampling module (2), modem module (3), display module (4), an input of CPU module (1) is connected with the output of power supply sampling module (2), the input of display module (4) connects an output of CPU module (1) respectively, and another output of CPU module (1) sends data to the monitoring backstage by modem module (3) or communicating circuit (16) by the mobile network.
2. a kind of distributing transformer monitoring terminal set according to claim 1, it is characterized in that CPU module (1) comprises master control chip (11), clock control part (12), storage area (13), switch acquisition part (14), pulse output (15) and communicating circuit (16), clock control part (12), storage area (13) is connected with master control chip (11) in the binary channels mode, the output of switch acquisition part (14) and pulse output (15) is connected an input of master control chip (11) respectively, and the input of communicating circuit (16) is connected with the output of the chip (11) of master control.
3. a kind of distributing transformer monitoring terminal set according to claim 2 is characterized in that master control chip (11) A/D that has been integrated, 16 bit processors that LCD drives.
4. according to claim 2 or 3 described a kind of distributing transformer monitoring terminal sets, it is characterized in that master control chip (11) adopts the method that detects voltage zero-cross to record frequency.
5. a kind of distributing transformer monitoring terminal set according to claim 2 is characterized in that described switch acquisition part (14) is that the external switch amount is gathered by light-coupled isolation, differentiates the operational mode of transformer according to the signal of switching value.
6. a kind of distributing transformer monitoring terminal set according to claim 2 is characterized in that described pulse output (15) is that active electrical degree and idle electric degree that device calculates are exported to the measuring accuracy use of gauge table platform as the monitoring distribution transformer terminals by pulse.
7. a kind of distributing transformer monitoring terminal set according to claim 2, it is characterized in that described communicating circuit (16) comprises RS232 and RS485 telecommunication circuit, be used for the smart machine of monitor terminal outside and the conversion of signals between the master control chip by 232 level transferring chip and 485 level transferring chip respectively, the middle optocoupler that adopts carries out Signal Spacing to it.
8. a kind of distributing transformer monitoring terminal set according to claim 1 is characterized in that the employing rectifier bridge heap circuit structure and the voltage-stabilizing device of power supply sampling module (2) exported three DC power supply as the terminal inner working power.
9. a kind of distributing transformer monitoring terminal set according to claim 1 is characterized in that power supply sampling module (2) adopts PT, CT loop that voltage, current conversion are become level signal input CPU module (1).
10. the purposes of a kind of distributing transformer monitoring terminal set according to claim 1, it is characterized in that: distributing transformer monitoring terminal set is installed on distribution transformer one side, the input of power supply sampling module (2) connects the high voltage end or the low-voltage end of transformer, output connects an input of CPU module (1), CPU module (1) is finished following work: the three-phase voltage of analyzing power supply sampling module (2) input, electric current, meritorious, idle, frequency, phase angle change, power factor, three-phase voltage, the total percent harmonic distortion of electric current, 3-15 voltage of three-phase, electric parameters such as current harmonics component ratio, determine the real-time loading condition of transformer, statistic record:
1) integral point data such as each loop three-phase voltage every day, three-phase current, three phases active power, three phase reactive power, apparent power, three-phase activity coefficient, harmonic parameters, frequency, meritorious electric weight and capacity of idle power;
2) each loop voltage every day, current maxima, minimum value and time of occurrence thereof, maximum, minimum value and the time of occurrence thereof of meritorious, reactive power, power factor; Statistic record every month, day meritorious electric weight and capacity of idle power; The cumulative time of the statistics super upper limit of voltage every day and super lower limit; Each is 15 minutes lowest high-current values and time mutually; The three-phase imbalance rate is greater than time of 25%; Power factor is greater than 0.9 time that reaches less than 0.8;
3) overvoltage, under-voltage, phase shortage, harmonic voltage transfinite, have a power failure constantly, incoming call constantly, accumulative total interruption duration, three-phase imbalance electric current incident such as transfinite.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006100365542A CN101110525A (en) | 2006-07-18 | 2006-07-18 | Distributing transformer monitoring terminal set and use thereof |
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| CNA2006100365542A CN101110525A (en) | 2006-07-18 | 2006-07-18 | Distributing transformer monitoring terminal set and use thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102289921A (en) * | 2010-06-18 | 2011-12-21 | 新华都特种电气股份有限公司 | Transformer test data measurement system and measurement locating method thereof based on wireless network |
| CN102468688A (en) * | 2010-11-17 | 2012-05-23 | 南京四方亿能电力自动化有限公司 | Economical operation automatic control system and method of distribution transformer |
| CN103514733A (en) * | 2012-11-02 | 2014-01-15 | 国家电网公司 | Centralized meter reading terminal for realization of power distribution and power utilization information collection |
| CN103995473A (en) * | 2014-05-05 | 2014-08-20 | 中国南方电网有限责任公司电网技术研究中心 | System for analog and simulation of transformer protection device |
| CN104779700A (en) * | 2015-03-26 | 2015-07-15 | 安徽波瑞电气有限公司 | Outdoor ring main unit based on intelligent IPV6 wireless free-networking communications |
| CN105429303A (en) * | 2015-12-30 | 2016-03-23 | 国网浙江余姚市供电公司 | Power distribution measurement and control terminal |
| CN106019092A (en) * | 2016-05-13 | 2016-10-12 | 江苏麟派电力科技有限公司 | Comprehensive online monitoring device for distribution transformer |
| CN106169810A (en) * | 2015-12-31 | 2016-11-30 | 国网山东省电力公司胶州市供电公司 | A kind of distribution transformer intelligent checking system based on Radio Transmission Technology |
| CN107612142A (en) * | 2017-09-29 | 2018-01-19 | 孙培丽 | wind power generation transformer remote monitoring system based on Zigbee technology |
| CN110940889A (en) * | 2019-12-06 | 2020-03-31 | 西安锐驰电器有限公司 | Fault detection method for high-voltage power equipment |
| CN111030306A (en) * | 2019-12-30 | 2020-04-17 | 江苏羚翎电气设备有限公司 | Distribution transformer monitoring terminal and monitoring method |
| CN112557724A (en) * | 2020-11-05 | 2021-03-26 | 浙江八达电子仪表有限公司 | VF high-frequency conversion direct-current analog quantity acquisition system based on modularization |
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2006
- 2006-07-18 CN CNA2006100365542A patent/CN101110525A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102289921A (en) * | 2010-06-18 | 2011-12-21 | 新华都特种电气股份有限公司 | Transformer test data measurement system and measurement locating method thereof based on wireless network |
| CN102289921B (en) * | 2010-06-18 | 2012-10-31 | 新华都特种电气股份有限公司 | Transformer test data measurement system and measurement locating method thereof based on wireless network |
| CN102468688A (en) * | 2010-11-17 | 2012-05-23 | 南京四方亿能电力自动化有限公司 | Economical operation automatic control system and method of distribution transformer |
| CN103514733A (en) * | 2012-11-02 | 2014-01-15 | 国家电网公司 | Centralized meter reading terminal for realization of power distribution and power utilization information collection |
| CN103995473B (en) * | 2014-05-05 | 2017-05-24 | 中国南方电网有限责任公司电网技术研究中心 | System for analog and simulation of transformer protection device |
| CN103995473A (en) * | 2014-05-05 | 2014-08-20 | 中国南方电网有限责任公司电网技术研究中心 | System for analog and simulation of transformer protection device |
| CN104779700A (en) * | 2015-03-26 | 2015-07-15 | 安徽波瑞电气有限公司 | Outdoor ring main unit based on intelligent IPV6 wireless free-networking communications |
| CN105429303A (en) * | 2015-12-30 | 2016-03-23 | 国网浙江余姚市供电公司 | Power distribution measurement and control terminal |
| CN106169810A (en) * | 2015-12-31 | 2016-11-30 | 国网山东省电力公司胶州市供电公司 | A kind of distribution transformer intelligent checking system based on Radio Transmission Technology |
| CN106019092A (en) * | 2016-05-13 | 2016-10-12 | 江苏麟派电力科技有限公司 | Comprehensive online monitoring device for distribution transformer |
| CN107612142A (en) * | 2017-09-29 | 2018-01-19 | 孙培丽 | wind power generation transformer remote monitoring system based on Zigbee technology |
| CN110940889A (en) * | 2019-12-06 | 2020-03-31 | 西安锐驰电器有限公司 | Fault detection method for high-voltage power equipment |
| CN111030306A (en) * | 2019-12-30 | 2020-04-17 | 江苏羚翎电气设备有限公司 | Distribution transformer monitoring terminal and monitoring method |
| CN112557724A (en) * | 2020-11-05 | 2021-03-26 | 浙江八达电子仪表有限公司 | VF high-frequency conversion direct-current analog quantity acquisition system based on modularization |
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