CN102262176A - Method for measuring channel data of feeder terminal unit of power system - Google Patents
Method for measuring channel data of feeder terminal unit of power system Download PDFInfo
- Publication number
- CN102262176A CN102262176A CN2011101619867A CN201110161986A CN102262176A CN 102262176 A CN102262176 A CN 102262176A CN 2011101619867 A CN2011101619867 A CN 2011101619867A CN 201110161986 A CN201110161986 A CN 201110161986A CN 102262176 A CN102262176 A CN 102262176A
- Authority
- CN
- China
- Prior art keywords
- sampling
- computing module
- data
- way switch
- calculates
- 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.)
- Granted
Links
Images
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Feedback Control In General (AREA)
Abstract
The invention discloses a method for measuring channel data of a feeder terminal unit of a power system, which is characterized in that: the power system comprises a single channel AD, a multipath switch and a sampling calculation module. According to the method disclosed by the invention, switch sampling is performed on the single channel AD under the control of the multipath switch; synchronous sampling point data of each channel is calculated by adopting the sampled data and the switching time of the multipath switch; and voltage, current, phase angle, power, power factor and other data of each loop are then calculated by adopting the synchronous sampling point data. The method reduces the complexity in designing a sampling circuit of the feeder terminal unit, greatly decreases the number of the ADs used in single feeder terminal unit and lowers the cost of the terminal. Due to the frequent use of the feeder terminal units in current intelligent power grid construction, the method can lower the investment cost of the feeder terminal unit directly, and accordingly, brings considerable economical benefit.
Description
Technical field
The present invention relates to power domain, in particular for the method for the channel data of measuring the electric system line feed terminals.
Background technology
As the important component part of national energy strategy and reply climate change strategy, intelligent grid has entered the eve of developing on a large scale.And as an important equipment in the intelligent grid link, line feed terminals is occupied very consequence therein.A common line feed terminals will be measured the data of a plurality of switches tens (even twenties tunnel) passage, use the such line feed terminals of traditional method just to need a plurality of hyperchannel AD or tens single channel AD, such scheme can cause the terminal cost very high.
Summary of the invention
Technical matters to be solved by this invention provides a kind of method that is used to measure the channel data of electric system line feed terminals, can reduce the usage quantity of AD in the line feed terminals, reduce the complexity of terminal hardware design, thereby significantly reduce the cost of terminal, reduce the construction cost of total system.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of method that is used to measure the channel data of electric system line feed terminals, and described electric system comprises single channel AD, multi-way switch, sampling computing module; Concrete measuring method is as follows:
(1) after the system start-up, the sampling computing module uses multi-way switch to switch at single channel AD of the time interval inner control of setting multiloop is sampled at first according to the default frequency (50HZ) of electrical network theory and need the total number of channels of sampling to calculate the switching interval of multi-way switch;
(2) the sampling computing module calculates each loop and the irrelevant amount of angle according to the raw data of sampling;
(3) the sampling computing module calculates angle between each passage according to the raw data of sampling;
(4) the sampling computing module utilizes and calculates the differential seat angle that each passage caused owing to the mistiming of sampling the switching time of multi-way switch, and then revises the correct differential seat angle that obtains between each passage;
(5) the sampling computing module calculates the power factor (PF) in each loop according to revised each interchannel phase angle, calculates the power in each loop in conjunction with power factor (PF) and voltage, galvanometer.
(6) the sampling computing module according to the raw data of the sampling in the regular hour and the number of times of the sampled data zero crossing during this period of time calculate the actual frequency of current electrical network, utilize this frequency and need the total number of channels of sampling to calculate multi-way switch switching time of making new advances at interval;
(7) the sampling computing module is at interval realized continuing sampling and is calculated each required real-time electric parameter data in repeating step (1)-(7), back at interval the switching time in the replacement step (1) switching time of utilizing the new multi-way switch that calculates in the above-mentioned steps (6).
The beneficial effect that the present invention is compared with prior art brought is:
The present invention utilizes multi-way switch control single channel AD to the hyperchannel switch sampling, utilize data and multi-way switch after the sampling to calculate the synchronous sampling point data of each passage switching time, data such as the voltage that utilizes synchronous number of samples it is calculated that again to there emerged a the loop, electric current, phase angle, power, power factor (PF).Reduce the complexity of the sample circuit design of line feed terminals, and reduced the AD quantity of using in the single line feed terminals in a large number, reduced the cost of terminal.Because need to use in a large number line feed terminals in the intelligent grid construction at present, the method can directly reduce the input cost of line feed terminals, thereby brings considerable economic.
Description of drawings
Fig. 1 is the actual moment synoptic diagram of each channel sample of native system.
Fig. 2 is the sampling instant synoptic diagram through the revised sampling point in theory of method of the present invention.
Embodiment
The present invention will be further described below in conjunction with Figure of description.
A kind of method that is used to measure the channel data of electric system line feed terminals, described electric system comprises single channel AD, multi-way switch, sampling computing module; Concrete measuring method is as follows:
(1) as shown in Figure 1, after the system start-up, the sampling computing module uses multi-way switch to switch at single channel AD of the time interval inner control of setting multiloop is sampled at first according to the default frequency (50HZ) of electrical network theory and need the total number of channels of sampling to calculate the switching interval of multi-way switch; Adjust to quantity according to the frequency of last computation and the president of needs sampling with the interval of post-sampling,, 1 second of switching time do once to get final product according to frequency adjustment multi-way switch because mains frequency can frequent variations;
(2) the sampling computing module calculates each loop and the irrelevant amount of angle according to the raw data of sampling, comprises voltage and current;
(3) the sampling computing module calculates angle between each passage according to the raw data of sampling;
(4) as shown in Figure 2, the sampling computing module utilizes and calculates the differential seat angle that each passage caused owing to the mistiming of sampling the switching time of multi-way switch, and then revises the correct differential seat angle that obtains between each passage;
(5) the sampling computing module calculates the power factor (PF) in each loop according to revised each interchannel phase angle, calculates the data such as power in each loop in conjunction with power factor (PF) and voltage, galvanometer.
(6) the sampling computing module according to the raw data of the sampling in the regular hour and the number of times of the sampled data zero crossing during this period of time calculate the actual frequency of current electrical network, utilize this frequency and need the total number of channels of sampling to calculate multi-way switch switching time of making new advances at interval;
(7) the sampling computing module is at interval realized continuing sampling and is calculated each required real-time electric parameter data (voltage, electric current, phase angle, power, power factor (PF) etc.) in repeating step (1)-(7), back at interval the switching time in the replacement step (1) switching time of utilizing the new multi-way switch that calculates in the above-mentioned steps (6).
The present invention utilizes multi-way switch control single channel AD to the hyperchannel switch sampling, utilize data and multi-way switch after the sampling to calculate the synchronous sampling point data of each passage switching time, data such as the voltage that utilizes synchronous number of samples it is calculated that again to there emerged a the loop, electric current, phase angle, power, power factor (PF).Reduce the complexity of the sample circuit design of line feed terminals, and reduced the AD quantity of using in the single line feed terminals in a large number, reduced the cost of terminal.Because need to use in a large number line feed terminals in the intelligent grid construction at present, the method can directly reduce the input cost of line feed terminals, thereby brings considerable economic.
Claims (1)
1. method that is used to measure the channel data of electric system line feed terminals, it is characterized in that: described electric system comprises single channel AD, multi-way switch, sampling computing module; Concrete measuring method is as follows:
(1) after the system start-up, the sampling computing module uses multi-way switch to switch at single channel AD of the time interval inner control of setting multiloop is sampled at first according to the default frequency (50HZ) of electrical network theory and need the total number of channels of sampling to calculate the switching interval of multi-way switch;
(2) the sampling computing module calculates each loop and the irrelevant amount of angle according to the raw data of sampling;
(3) the sampling computing module calculates angle between each passage according to the raw data of sampling;
(4) the sampling computing module utilizes and calculates the differential seat angle that each passage caused owing to the mistiming of sampling the switching time of multi-way switch, and then revises the correct differential seat angle that obtains between each passage;
(5) the sampling computing module calculates the power factor (PF) in each loop according to revised each interchannel phase angle, calculates the power in each loop in conjunction with power factor (PF) and voltage, galvanometer.
(6) the sampling computing module according to the raw data of the sampling in the regular hour and the number of times of the sampled data zero crossing during this period of time calculate the actual frequency of current electrical network, utilize this frequency and need the total number of channels of sampling to calculate multi-way switch switching time of making new advances at interval;
(7) the sampling computing module is at interval realized continuing sampling and is calculated each required real-time electric parameter data in repeating step (1)-(7), back at interval the switching time in the replacement step (1) switching time of utilizing the new multi-way switch that calculates in the above-mentioned steps (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110161986.7A CN102262176B (en) | 2011-06-16 | 2011-06-16 | A kind of method of the channel data for measuring power system line feed terminals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110161986.7A CN102262176B (en) | 2011-06-16 | 2011-06-16 | A kind of method of the channel data for measuring power system line feed terminals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102262176A true CN102262176A (en) | 2011-11-30 |
| CN102262176B CN102262176B (en) | 2016-09-07 |
Family
ID=45008882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110161986.7A Active CN102262176B (en) | 2011-06-16 | 2011-06-16 | A kind of method of the channel data for measuring power system line feed terminals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102262176B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301402A (en) * | 2015-11-12 | 2016-02-03 | 积成电子股份有限公司 | Alternating current signal collection and automatic calibration method |
| CN110277995A (en) * | 2019-07-30 | 2019-09-24 | 荏原冷热系统（中国）有限公司 | Sampling channel modification method and system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH634414A5 (en) * | 1977-01-24 | 1983-01-31 | Hartmann & Braun Ag | Circuit arrangement for monitoring the phase currents in a multi-phase system |
| CH660798A5 (en) * | 1983-10-10 | 1987-06-15 | Landis & Gyr Ag | ADDITIONAL CIRCUIT TO A MEASURING CONVERTER. |
| CN201122243Y (en) * | 2007-07-25 | 2008-09-24 | 唐德尧 | Wireless sensor device for detecting device fault |
| CN201434904Y (en) * | 2008-12-26 | 2010-03-31 | 广州电器科学研究院 | Battery detecting sampling control device based on CPLD |
| CN201497780U (en) * | 2009-08-06 | 2010-06-02 | 上海工业自动化仪表研究所 | Rapid cyclic-detection device for two-wire industrial instruments |
| CN201522701U (en) * | 2009-11-23 | 2010-07-07 | 威胜集团有限公司 | Multi-channel analog signal amplification data acquisition circuit |
| CN101887092A (en) * | 2010-06-25 | 2010-11-17 | 房慧龙 | Resistance measurement method with wide temperature range, wide measurement range, high precision and low cost |
-
2011
- 2011-06-16 CN CN201110161986.7A patent/CN102262176B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH634414A5 (en) * | 1977-01-24 | 1983-01-31 | Hartmann & Braun Ag | Circuit arrangement for monitoring the phase currents in a multi-phase system |
| CH660798A5 (en) * | 1983-10-10 | 1987-06-15 | Landis & Gyr Ag | ADDITIONAL CIRCUIT TO A MEASURING CONVERTER. |
| CN201122243Y (en) * | 2007-07-25 | 2008-09-24 | 唐德尧 | Wireless sensor device for detecting device fault |
| CN201434904Y (en) * | 2008-12-26 | 2010-03-31 | 广州电器科学研究院 | Battery detecting sampling control device based on CPLD |
| CN201497780U (en) * | 2009-08-06 | 2010-06-02 | 上海工业自动化仪表研究所 | Rapid cyclic-detection device for two-wire industrial instruments |
| CN201522701U (en) * | 2009-11-23 | 2010-07-07 | 威胜集团有限公司 | Multi-channel analog signal amplification data acquisition circuit |
| CN101887092A (en) * | 2010-06-25 | 2010-11-17 | 房慧龙 | Resistance measurement method with wide temperature range, wide measurement range, high precision and low cost |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301402A (en) * | 2015-11-12 | 2016-02-03 | 积成电子股份有限公司 | Alternating current signal collection and automatic calibration method |
| CN105301402B (en) * | 2015-11-12 | 2018-04-13 | 积成电子股份有限公司 | A kind of ac signal acquisition and automatic calibrating method |
| CN110277995A (en) * | 2019-07-30 | 2019-09-24 | 荏原冷热系统（中国）有限公司 | Sampling channel modification method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102262176B (en) | 2016-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8326554B2 (en) | Systems, methods, and apparatus for utility meter phase identification | |
| CN102520386B (en) | Calibration method of three-phase electric energy meter | |
| CN104535839B (en) | Photovoltaic grid-connected inverter insulation resistance detecting method and detecting device for implementing same | |
| CN102623966B (en) | Differential protection method for bus | |
| CN103792508A (en) | Error test system and method for digitized metering device | |
| CN107064630B (en) | A kind of power system frequency measurement method and device | |
| CN103728555A (en) | Temperature rise test circuit of low-voltage complete set switchgear and test method thereof | |
| Khalid et al. | Closure to discussion on" A method for short-term wind power prediction with multiple observation points" | |
| CN202676832U (en) | Distribution network feeder line monitoring terminal integrated testing device | |
| Paolone et al. | A hardware-in-the-loop test platform for the real-time state estimation of active distribution networks using phasor measurement units | |
| CN108988975B (en) | Correction method and device for ammeter clock | |
| CN102497019A (en) | Transformer substation-dispatching center two-stage state estimation multi-source data timing and splicing method | |
| Mutanen et al. | Testing low voltage network state estimation in RTDS environment | |
| CN103051062A (en) | Intelligent phase selection system and method for multifunctional measuring and control device | |
| CN106054000B (en) | It is spaced combining unit power-factor angle consistency on-site test system and test method | |
| CN102262176A (en) | Method for measuring channel data of feeder terminal unit of power system | |
| CN104393620A (en) | Control method and device for current-predicated photovoltaic grid-connected inverter | |
| CN112924862B (en) | System and method for detecting primary side fault injection (FA) | |
| CN202886585U (en) | On-line test device for voltage/current transformer | |
| CN104717157A (en) | Optical digital message sending method based on absolute time scale | |
| RU2531038C2 (en) | Method for monitoring state of electrical network and power facility and device for its implementation | |
| CN104407316A (en) | Calibrating device and calibrating method based on discrete synchronous power sources | |
| CN105842652B (en) | A kind of digital electricity meter on-line testing method | |
| CN104316114A (en) | Intensive type touch screen intelligent power meter | |
| CN102890173B (en) | A kind of reactive power metering method and device improving reactive power error |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |