CN103412182B - Method using electric power meter monitoring voltage qualification rate - Google Patents
Method using electric power meter monitoring voltage qualification rate Download PDFInfo
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Abstract
The invention discloses a kind of method of utilization electric power meter monitoring voltage qualification rate, the present invention in terms of rate of qualified voltage monitoring device, rate of qualified voltage monitoring place, rate of qualified voltage statistical method, main website construction etc. on propose method using electric power meter monitoring voltage qualification rate.Which is that described electric power meter is continuously monitored and statistical function with caused voltage deviation slowly varying to power system normal operating condition by the use of the electric power meter on electrical network as rate of qualified voltage monitoring terminal.Have：Plant modification is cheap with implementation cost, improve rate of qualified voltage statistics accuracy and objectivity the advantages of.
Description
Technical field
The present invention relates to a kind of rate of qualified voltage monitoring method, particularly a kind of using the conjunction of electric power meter monitoring voltage
The method of lattice rate.
Background technology
Rate of qualified voltage is one of important indicator of the quality of power supply, the quality of quality of voltage safety and warp to power system
Ji operation, the safety to ensureing user security production and product quality and electrical equipment have important impact with the life-span.Receive
Electric terminal voltage qualification rate reflects the power supply quality important indicator of power supply enterprise, is that power monitoring mechanism is powered to power supply enterprise
Quality implements one of main contents of supervision.At present, realize power supply enterprise and realize the voltage monitoring master to each electric pressure electrical network
If being realized by installing voltage monitoring instrument.
Voltage monitoring instrument is connected with caused voltage deviation slowly varying to power system normal operating condition
Continuous monitoring and the device of statistical function.According to《Power supply supervisory method》（27 command of Electricity Monitoring Commission）Relevant requirement, power supply enterprise exists
Voltage monitoring instrument is installed in the position of regulation, and the situation for arranging voltage monitoring point to power supply enterprise by power monitoring mechanism implements prison
Pipe[2].At present, the wide variety of voltage monitoring instrument of power supply enterprise typically all carries communication interface, can realize voltage monitoring data
Transporting function, data self-timing is reported to voltage monitoring system main website to carry out statistical management.
With the proposition of intelligent grid standard, the extensive of the technology such as intelligent scheduling, power energy storage, electrical power distribution automatization system should
With, progressively there is larger change in distribution power, the access electrical network successively of micro-capacitance sensor, the operational mode of Distribution network,
The regularity of distribution of line voltage distribution meets the rule being gradually lowered to user end by nearly power end again.Cause head end, the end of circuit
The definition at end loses meaning completely, and correspondingly, head end, terminal voltage qualification rate monitoring method just lose meaning completely.
As all kinds of rate of qualified voltage data are installed special recording device by power supply enterprise and provide statistics to come in fact
Existing, its statistics is larger by subjective impact, it is difficult to truly, objectively reflect supply voltage qualification rate authenticity.In addition, real
The statistics of existing rate of qualified voltage data is required to put into special equipment, system and organizes special messenger to be safeguarded, occupies larger
Financial and manpower resources.Therefore, in conjunction with existence conditions, propose one kind can provide receiving end voltage qualification rate electric power meter and
Monitoring method is very of practical meaning.
Content of the invention
It is an object of the invention in place of overcoming the deficiencies in the prior art, and one kind is provided and can realize rate of qualified voltage monitoring
It is reliable, feasible, special voltage monitoring instrument can be replaced to realize the monitoring and statisticses of electrical network and isoelectric point rate of qualified voltage
Utilization electric power meter monitoring voltage qualification rate method.
A kind of method of utilization electric power meter monitoring voltage qualification rate, by the electricity with rate of qualified voltage monitoring function
Energy metering device is arranged between power supply enterprise and the property right separation of power consumer, and described monitors work(with rate of qualified voltage
Can electric power meter be intelligent metering device with DSP digital signal processing capability and telecommunication, by by voltage
Major parameter involved by qualification rate include voltage transformer no-load voltage ratio, more upper voltage limit, more lower voltage limit, decompression voltage parameter, adopt
Sample measurement period and the check and correction of hardware clock time, preset and are stored in the parameter region of the data storage of electric power meter,
When metering device power-up starts, relevant parameter and system time are read electric power meter by ammeter initialization program
In MCU internal memory, the alternating voltage analog signal that then monitoring point is input into by metering device using its sample circuit carries out analog-to-digital
Conversion, the signal of input is changed into alternating voltage data signal, and exporting metering device DSP carries out calculation process, metering dress
Putting DSP carries out calculation process to the digital voltage signal being input into, and calculates voltage effective value, unit interval average voltage,
MCU reads the voltage value that DSP is generated, according to interval that its magnitude of voltage is located press Over High-Limit Voltage, qualified, more under
Limit, four type of decompression are compared and timing of classify adds up, and regularly carry out rate of qualified voltage statistics by measurement period, and by shape
The statistics output for becoming is stored to data storage, and statistics output is arrived locally displayed equipment by MCU also timing, and
Timing uploads to main station system.
In a measurement period, single household rate of qualified voltage statistical method is as follows：
（Formula 1）
In formula, T is measurement period duration, T1 is Over High-Limit Voltage duration, T2 is the more lower limit of voltage（Decompression is not included
Duration）, T3 be decompression duration.
After metering device onboard clock is completed when a measurement period is walked, MCU is calculated with regard to automatic rate of qualified voltage
Program, calculates the single household rate of qualified voltage of previous measurement period, and related data is write data storage, by multiple systems
The single household rate of qualified voltage related data in meter cycle is preserved for a long time
The voltage effective value of monitoring point is per second at least to sample 1 time, and the average voltage of monitoring point is per minute at least to count one
Secondary, monitor point voltage and rate of qualified voltage data statistics cycle with day, the moon, season or year as cycle are recorded respectively and store,
The voltage data for being counted also includes voltage minimum, maximum, mean value, integral point value etc., when the measurement period time is by hardware
Clock is provided, hardware clock periodically with to guarantee time accuracy during periodically automatic pair of main station system.
By the use of power user power consumption information acquisition system as rate of qualified voltage statistical management main website, described main station system
Master Station Software is upgraded on a small quantity, is increased rate of qualified voltage monitoring and statisticses function, main website is logical by power information gathered data
Letter net receives, store the rate of qualified voltage statistics of each monitoring point, and automatically according to default program temporally, region, electricity
Pressure grade Statistical Criteria reads monitoring point rate of qualified voltage data and carries out rate of qualified voltage statistics, and its average voltage qualification rate is by public affairs
Formula（2）Calculated,
In a measurement period, same electric pressure, average voltage qualification rate of same power supply area power consumer etc.
In multiple monitoring points voltage qualified time sum divided by monitoring point operating statistic time sum, i.e.,
In sum, the present invention following advantage compared to existing technology：
The present invention is from rate of qualified voltage monitoring device, rate of qualified voltage monitoring place, rate of qualified voltage statistical method, main website
The method using electric power meter monitoring voltage qualification rate is proposed in the aspects such as construction.Which is using on electrical network
Electric power meter has to the normal operation shape of power system as rate of qualified voltage monitoring terminal, described electric power meter
The slowly varying caused voltage deviation of state is continuously monitored and statistical function.Have：
（1）Plant modification is cheap with implementation cost, with based on DSP and the metering device with telecommunications functions is as base
Plinth, carries out corresponding software exploitation, can replace existing specialized voltages monitor, decompression calculagraph completely, both can be used as electricity
Energy metering device is used, it is also possible to used as voltage monitoring instrument.（2）Improve rate of qualified voltage statistics accuracy and
Objectivity, rate of qualified voltage statistics are all supervised jointly by power supply regulator, power supply enterprise and power consumer tripartite, maximum
Limit ground excludes the artificial disturbance factor of traditional monitoring equipment and statistical method.（3）Compatible《Power consumer electricity consumption information is gathered
System》Relevant demand of technical standard, directly realizes the remote of rate of qualified voltage data using resources such as its related communication, main station systems
Journey automatic data collection and statistics, it is not necessary to set up special rate of qualified voltage correlation acquisition system.（4）The magnitude of voltage of any monitoring point
And voltage curve all can real time remote call survey together, power supply enterprise can be renovated according to the more targeted development of Monitoring Data " low-voltage "
Work, improves power supply quality.
The data acquisition principle, basic skill of the metering devices such as electricity load management terminal, Distribution transformer, intelligent electric meter
Art framework is consistent, all adopts based on DSP computation chip and with remote communication module, and its difference is only purposes and user couple
The difference of elephant.Above-mentioned all kinds of metering devices are carried out increasing voltage monitoring statistical software function, directly using such metering device
Rate of qualified voltage statistical function is realized without technology barrier, the above-mentioned all kinds of metering devices after improvement can all possess voltage monitoring
The function of instrument.
From now on, intelligent grid construction and development, distributed power source, micro-capacitance sensor power supply will access electrical network successively, and this will cause
The statistical method of traditional circuit first and last end setting voltage qualification rate monitoring point loses accuracy.For such case, voltage is improved
Monitoring and statisticses equipment and statistical method, realize all kinds of voltages of intelligent grid using electric power meter and power information acquisition system
The statistics of qualification rate data, is the effective means for obtaining accurate voltage qualification rate data.
Show through the prolonged application in actual motion environment, voltage conjunction is realized using Intelligent electric-energy metering device after improvement
The monitoring of lattice rate is reliable, feasible, can replace special voltage monitoring instrument to realize electrical network and isoelectric point rate of qualified voltage
Monitoring and statisticses.The development of intelligent grid, it is also proposed new requirement to rate of qualified voltage monitoring device and statistical method, using meter
Measure device rate of qualified voltage monitoring and statisticses are realized, the demand of electrical network change is adapted to, and be power supply enterprise on higher degree
Industry effectively monitors power quality, improving service level provides objective and accurate basic data and supervision meanses.
Description of the drawings
Fig. 1 is the voltage data acquisition process schematic diagram of the utilization electric power meter monitoring voltage qualification rate of the present invention.
Fig. 2 is the statistical function module diagram of the utilization electric power meter monitoring voltage qualification rate of the present invention.
Fig. 3 is the block diagram of the whole minute average voltage by stages calendar subroutine of the present invention.
Label declaration
Specific embodiment
The present invention is described in more detail with reference to embodiment.
Embodiment 1
A kind of method of utilization electric power meter monitoring voltage qualification rate as Figure 1-3, due to rate of qualified voltage
Involved major parameter includes voltage transformer no-load voltage ratio, more upper voltage limit, more lower voltage limit, decompression voltage parameter, sampling statistics
Cycle and the check and correction of hardware clock time, above-mentioned parameter should just preset and be stored in data storage when the metering device is installed
The parameter region of device, when metering device power-up starts, relevant parameter and system time are read MCU's by ammeter initialization program
In internal memory.
（1）The record of monitoring point rate of qualified voltage
Electric power meter after improvement is installed on monitoring point, as shown in figure 1, the utilization sample circuit of metering device will
The alternating voltage analog signal of monitoring point input carries out analog-to-digital conversion, and the signal of input is changed into alternating voltage numeral letter
Number, output carries out calculation process to DSP.DSP carries out calculation process to the digital voltage signal being input into, and calculates voltage effective
Value, unit interval average voltage.MCU reads the voltage value that DSP is generated, and presses voltage according to interval that its magnitude of voltage is located and more goes up
Limit, qualified, more lower limit, four type of decompression are compared and timing of classifying adds up, and carry out voltage by measurement period timing qualified
Rate is counted, and the statistics output of formation is stored to data storage.MCU also timing is by statistics output to this
Ground display device, and timing uploads to main station system.The voltage effective value of monitoring point is per second at least to sample 1 time, the electricity of monitoring point
Flatten that average is per minute at least counts once.Monitor point voltage and the rate of qualified voltage data statistics cycle with day, the moon, year (season) is
Cycle is recorded respectively and is stored, and the voltage data for being counted also includes voltage minimum, maximum, mean value, integral point value
Deng.The measurement period time is provided by hardware clock, hardware clock periodically with to guarantee that the time accurate during periodically automatic pair of main station system
True property.
In a measurement period, single household rate of qualified voltage statistical method is as follows：
（Formula 1）
In formula, T is measurement period duration, T1 is Over High-Limit Voltage duration, T2 is the more lower limit of voltage（Decompression is not included
Duration）, T3 be decompression duration.
Rate of qualified voltage data are responsible for statistical disposition by MCU, and metering device primary control program sums up place comprising rate of qualified voltage
Reason functional software module, the software module include whole minute average voltage by stages calendar subroutine, and press integral point, all day,
The whole month and the whole year（Season）Rate of qualified voltage counts subprogram.When MCU monitor hardware clock complete whole minute walk when after, MCU adjust
With whole minute average voltage by stages calendar subroutine is run, interval by the timing that adds up is carried out as belonging to voltage, count voltage
The more lower limit T2 of upper limit T1, voltage, decompression duration T3, and data storage.As MCU, to monitor that hardware clock is completed whole
Point, all day, the whole month and the whole year（Season）After when walking, operation subprograms corresponding is called respectively, by formula（1）Calculate all kinds of statistics week
The rate of qualified voltage of phase, and result of calculation is write data storage.
The handling process of the whole minute average voltage by stages timing of metering device.Put down with the DSP primary voltage that calculates per minute
As a example by average, after MCU obtains 1 minute average voltage from DSP, the whole minute average voltage by stages of startup optimization metering device
Timing.After When subroutine starts, the inspection that sends a telegram in reply after whether metering device has a power failure is carried out first, if it is, by hardware clock
Time write metering device telegram in reply marker register Tpon, and according to metering device power failure markers Tpoff, telegram in reply markers Tpon
Calculate decompression duration T3；Subsequently, the current average voltage Uavg that DSP is calculated by MCU and upper voltage limit parameter Uul, voltage
Lower limit parameter Ull, decompression parameter Ulp are compared, and carry out the cumulative timing of T1, T2, T3 respectively；Finally, subroutine call data
Storing process, writes data into the local data base of data storage.Power failure markers Tpoff, the purposes of telegram in reply markers Tpon are
For recording metering device decompression, the duration after power down, to count correct decompression duration T3.
（2）, the display of rate of qualified voltage and long-distance Log server
The MCU of metering device by single household rate of qualified voltage related data, such as：The qualified duration of Over High-Limit Voltage duration, voltage,
The data outputs such as the more lower limit of voltage, single household rate of qualified voltage to locally displayed equipment, by GPRS, power line carrier remote
Communication module timing upload the data to main station system.Fig. 3 is the increase in the metering device of rate of qualified voltage monitoring and statisticses function
Outline drawing, the device are improved with the load management terminal of certain company's production as row function during prototype.It is device rate of qualified voltage system
Meter relative parameters setting and data query menu.
（3）
This programme need not set up independent rate of qualified voltage monitoring main website, directly in the hard of power information acquisition system main website
Part equipment and the communication resource, are only upgraded on a small quantity to Master Station Software, increase rate of qualified voltage monitoring and statisticses function.Main website passes through
Power information gathered data communication network receives, stores the rate of qualified voltage statistics of each monitoring point, and automatically according to default
Program is temporally, region, the Statistical Criteria such as electric pressure reads monitoring point rate of qualified voltage data carries out rate of qualified voltage statistics,
Its average voltage qualification rate presses formula（2）Calculated.
In a measurement period, same electric pressure, average voltage qualification rate of same power supply area power consumer etc.
In multiple monitoring points voltage qualified time sum divided by monitoring point operating statistic time sum, i.e.,
（4）Test and applicable cases
Grinding for rate of qualified voltage monitoring function is carried out metering device of the electricity load management terminal for prototype foundation is completed
Upgrading is sent out, and after power information acquisition system main website increases rate of qualified voltage monitoring function, the device is powered enterprise in a county
Industry is installed or setting voltage qualification rate C class monitoring point 38, D class monitoring point 66.Metering device voltage acquisition precision is 0.5
Level, remote communication module adopt GPRS communication module.According to 10kV, 0.4 kV power consumer circuit distribution situation, by electricity
The pertinent regulations of pressure monitoring point setting requirements, directly select part and have been provided with terminal 10kV and specially become user as C class voltage
Monitoring point, and mounting portion terminal is supplemented to 0.4 kV line end monitoring point as line end voltage monitoring point.Each voltage
Monitoring point terminal is communicated using GPRS mode with the communication mode of main website.Through the practical application of 5 years, each voltage monitoring point device
Ruuning situation is good.Retain system remote check meter, on the basis of original various functions such as load management, power information acquisition system
Main website not only can carry out rate of qualified voltage statistics to each voltage monitoring point, and path monitoring voltage condition can be supervised in real time
Survey.
The not described part of the present embodiment is same as the prior art.
Claims (3)
1. a kind of method of utilization electric power meter monitoring voltage qualification rate, it is characterised in that：Comprise the following steps that to have
The electric power meter of rate of qualified voltage monitoring function is arranged between power supply enterprise and the property right separation of power consumer, described
The electric power meter with rate of qualified voltage monitoring function be intelligence with DSP digital signal processing capability and telecommunication
Can metering device, by major parameter involved by rate of qualified voltage is included voltage transformer no-load voltage ratio, more upper voltage limit, more lower limit
The check and correction of voltage, decompression voltage parameter, sampling statistics cycle and hardware clock time, presets and is stored in electric power meter
The parameter region of data storage, when metering device power-up starts, relevant parameter and system time are read by ammeter initialization program
Get in the MCU internal memory of electric power meter, the alternating voltage that then monitoring point is input into by metering device using its sample circuit
Analog signal carries out analog-to-digital conversion, and the signal of input is changed into alternating voltage data signal, and output is entered to metering device DSP
Row operation is processed, and metering device DSP carries out calculation process to the digital voltage signal being input into, and calculates voltage effective value, unit
Time voltage mean value, MCU read the voltage value that DSP is generated, and press Over High-Limit Voltage, conjunction according to interval that its magnitude of voltage is located
Lattice, more lower limit, four type of decompression are compared and timing of classifying adds up, and carry out rate of qualified voltage system by measurement period timing
Meter, and the statistics output of formation is stored to data storage, statistics output is arrived local aobvious by MCU also timing
Show equipment, and timing uploads to main station system, in a measurement period, single household rate of qualified voltage statistical method is as follows：
In formula, T is measurement period duration, T1 is Over High-Limit Voltage duration, T2 is the more lower limit of voltage, when T2 does not include decompression
Long, T3 is decompression duration, and the handling process of the whole minute average voltage by stages timing of metering device is calculated once so that DSP is per minute
As a example by average voltage, after MCU obtains 1 minute average voltage from DSP, the whole minute average voltage of startup optimization metering device
By stages timing, after When subroutine starts, carries out the inspection that sends a telegram in reply after whether metering device has a power failure first, if it is, will be hard
The time write metering device telegram in reply marker register Tpon of part clock, and during according to metering device power failure markers Tpoff, telegram in reply
Mark Tpon calculates decompression duration T3；Subsequently, the current average voltage Uavg that DSP is calculated by MCU and upper voltage limit parameter
Uul, lower voltage limit parameter Ull, decompression parameter Ulp are compared, and carry out the cumulative timing of T1, T2, T3 respectively；Finally, subprogram
Data storage procedure is called, writes data into the local data base of data storage, power failure markers Tpoff, telegram in reply markers Tpon
Purposes be for recording metering device decompression, the duration after power down, to count correct decompression duration T3.
2. the method for utilization electric power meter monitoring voltage qualification rate according to claim 1, it is characterised in that：Monitoring
The voltage effective value of point is per second at least to sample 1 time, and the average voltage of monitoring point is per minute at least to be counted once, monitors point voltage
And rate of qualified voltage data statistics cycle with day, the moon, season or year as cycle are recorded respectively and are stored, the voltage number for being counted
According to voltage minimum, maximum, mean value, integral point value is also included, the measurement period time is provided by hardware clock, and hardware clock is fixed
To guarantee time accuracy when periodically automatic pair of phase and main station system.
3. the method for utilization electric power meter monitoring voltage qualification rate according to claim 2, it is characterised in that：Using electric power
User power utilization information acquisition system has added voltage as rate of qualified voltage statistical management main website, described main station system to Master Station Software
Qualification rate monitoring and statisticses function, main website are received, are stored by power information gathered data communication network the rate of qualified voltage system of each monitoring point
Count, and automatically according to default program temporally, region, electric pressure Statistical Criteria read monitoring point rate of qualified voltage data and enter
Row rate of qualified voltage is counted, and its average voltage qualification rate is pressed
Formula is calculated,
In a measurement period, same electric pressure, the average voltage qualification rate of same power supply area power consumer are equal to many
The voltage qualified time sum of individual monitoring point is divided by monitoring point operating statistic time sum.
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| CN103926459B (en) * | 2013-12-02 | 2017-01-18 | 国家电网公司 | Power supplying voltage automatic acquisition system deployed on two levels in centralized mode and method thereof |
| CN105070029A (en) * | 2015-08-12 | 2015-11-18 | 江苏省电力公司苏州供电公司 | Carrier meter reading module having voltage eligibility rate monitoring function |
| CN105067876A (en) * | 2015-08-12 | 2015-11-18 | 江苏省电力公司苏州供电公司 | Tail-end voltage qualified rate monitoring device |
| CN106018931B (en) * | 2016-05-12 | 2018-11-30 | 南方电网科学研究院有限责任公司 | Rate of qualified voltage monitoring method and system |
| CN107422175B (en) * | 2017-08-25 | 2020-12-25 | 中国电力科学研究院有限公司 | Method and system for judging clock abnormity of power consumption information acquisition system |
| CN108037343A (en) * | 2017-10-23 | 2018-05-15 | 国网北京市电力公司 | A kind of voltage monitoring Management System Data deepens analysis method |
| CN109490611B (en) * | 2018-10-29 | 2021-03-05 | 宁波三星智能电气有限公司 | Time statistical method for embedded equipment |
| CN110907716B (en) * | 2019-10-14 | 2022-02-08 | 深圳供电局有限公司 | Method and device for judging voltage deviation isolation effect, power supply system, computer equipment and storage medium |
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| US7974794B2 (en) * | 2007-12-06 | 2011-07-05 | Toshiba Toko Meter Systems Co., Ltd. | Electric energy meter |
| CN201464554U (en) * | 2009-08-21 | 2010-05-12 | 威胜集团有限公司 | Electric energy meter with voltage monitoring function |
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Effective date of registration: 20170208 Address after: 362300 Nanan Province, the United States and the United States, Xinhua Street, No. 188 Applicant after: Wang Chengkai Applicant after: STATE GRID FUJIAN NAN'AN POWER SUPPLY CO., LTD. Applicant after: State Grid Corporation of China Applicant after: State Grid Fujian Electric Power Co., Ltd. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: Fujian Electric Power Co., Ltd. Applicant before: Wang Chengkai Applicant before: Fujian Nan'an Electric Power Co., Ltd. |
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