CN109637109A - A kind of method that electric quantity data acquisition passes through in power plant - Google Patents
A kind of method that electric quantity data acquisition passes through in power plant Download PDFInfo
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- CN109637109A CN109637109A CN201811508997.6A CN201811508997A CN109637109A CN 109637109 A CN109637109 A CN 109637109A CN 201811508997 A CN201811508997 A CN 201811508997A CN 109637109 A CN109637109 A CN 109637109A
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
- G01R22/063—Details of electronic electricity meters related to remote communication
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a kind of methods that electric quantity data acquisition passes through in power plant, detect power plant's electric energy flow situations with electric energy acquisition plant stand terminal and plant stand critical point meter, realize the data synchronizing function of high real-time, provide accurate data to pass through the calculating of electricity.Electric energy meter tells electric energy power flow changing and notifies plant stand terminal by digital quantity I/O, plant stand terminal receives after the digital quantity I/O signal of electric energy meter initiation to all electric energy meters while sending out freeze command instantaneous, electric energy meter stores current electric quantity information after receiving instantaneous freeze command immediately, plant stand terminal reads the newly-increased instantaneous freezing data of electric energy meter, generates the data set for passing through coulometric analysis calculating.The situation of having good luck of each electric energy meter during present invention acquisition creation data collection energy accurate recording power flow changing；Wherein the broadcast freezing method with serial number makes the data high level of synchronization between different tables, avoids the generation of synchronous error；Wherein digital quantity I/O interface mode and broadcasting command enable information to transmit more in real time.
Description
Technical field
The present invention relates to the sides that electrical energy measurement field technical field more particularly to a kind of power plant pass through electric quantity data acquisition
Method.
Background technique
Currently, under electric Power Reform situation, all kinds of thermoelectricitys, water power and new energy power plant such as emerge rapidly in large numbersBamboo shoots after a spring rain set up the project it is grid-connected.Power plant
Electricity volume and off line electricity clearing critical point are arranged by assets separation, i.e., clearing critical point are located at submitting line electricity
Factory side.Net power transmission amount after the clearing of this electricity take upper and lower net electricity to offset each other to settle accounts with power plant.Actually due to hair,
Transmission of electricity valence is different, this very unreasonable by the way of the clearing of net power transmission amount, does not also meet relevant departments to online, off line electricity
The requirement settled accounts respectively, therefore there is an urgent need to net separated clearing above and below.
Penetration refers to that power flows into bus, and the function flowed out via an other outlet by a certain outlet of power plant
Rate.If do not have penetration under normal operating mode, on bus, the energy metering device of outlet Power Plant Side is being set just
Power plant's online and off line electricity can be accurately measured to reversed electricity.But actually since the power plant having can be by other electricity
Factory's bus online will be generated on power plant's bus as hinge power station at this time passes through trend, and energy metering device can not
Electricity and upper and lower net electricity are passed through in differentiation.The electricity passed through can be added to respectively two lines road energy metering device forward direction and
In reversed electricity, and energy metering device can not will be travelling through electricity and deduct from online that metering device counts, off line electricity, lead
Cause can not accurately obtain true online, off line electricity, thus cause charge calculation dispute.
For the accurate metering for realizing upper and lower net electricity, previous design concept be by the auxiliary contact access of breaker after
Logic judgment is carried out in electrical circuit, but this method needs a large amount of relay to realize complicated logic judgment, builds and changes
It causes larger.The present invention (calls " electricity in the following text by with electric energy acquisition plant stand terminal (calling " plant stand terminal " in the following text) and plant stand critical point meter
Energy table ") detection power plant's electric energy flow situations, it realizes the data synchronizing function of high real-time, provides standard to pass through the calculating of electricity
Exact figures evidence.
Summary of the invention
The object of the invention is to remedy the disadvantages of known techniques, provides the side that electric quantity data acquisition passes through in a kind of power plant
Method.
The present invention is achieved by the following technical solutions:
A kind of method that electric quantity data acquisition passes through in power plant, it is characterised in that: include electric energy meter and plant stand terminal, the electricity
Energy table tells electric energy power flow changing and notifies plant stand terminal, plant stand terminal to receive electric energy meter initiation by digital quantity I/O
Send out freeze command instantaneous simultaneously to all electric energy meters after digital quantity I/O signal, electric energy meter receives after instantaneous freeze command immediately
Current electric quantity information is stored, the newly-increased instantaneous freezing data of all electric energy meters is read, generated for passing through electricity by plant stand terminal
The data set of analytical calculation.
The real-time accumulated positive active energy of the electric energy meter, reversed reactive energy and four-quadrant reactive energy, are examined in real time
Active energy trend is surveyed, record electric energy trend changes event and changes number by trend immediately when active energy trend changes
It measures I/O interface output trend and changes signal；When active energy trend is timing, output high level, when active energy trend is negative
When export low level；Freeze to pass through electricity calculating information, institute immediately when receiving the instantaneous freeze command of plant stand terminal sending
State pass through electricity calculate information include forward and reverse active energy with synchronize freeze serial number.
The plant stand terminal is responsible for the monitoring collection of electric energy meter, including flow state monitoring, initiation data-frozen and jelly
Tie reading data.
The flow state monitoring is realized by Multipath digital quantity I/O interface, and Multipath digital quantity I/O interface connects simultaneously
The digital quantity signal for receiving the output of muti-piece electric energy meter determines that monitored electric energy trend changes when either signal changes.
The initiation data-frozen refers to when terminal determines that monitored electric energy trend changes, and passes through immediately
The instantaneous freeze command of RS485 communication bus broadcast transmission notifies subordinate's electric energy meter to carry out data-frozen, band in instantaneous freeze command
It synchronizes and freezes serial number, the electric energy meter freezes serial number and is stored in freezing data using synchronizing, work when passing through coulometric analysis
For the synchronous mark of data.
The freezing data reading passes through RS485 communication bus for all subordinate's electric energy meters after referring to initiation data-frozen
Newly-increased freezing data read, generate data set.
The invention has the advantages that each electric energy meter during the creation data collection energy accurate recording power flow changing that the present invention acquires
It has good luck situation；Wherein the broadcast freezing method with serial number makes the data high level of synchronization between different tables, avoids the production of synchronous error
It is raw；Wherein digital quantity I/O interface mode and broadcasting command enable information to transmit more in real time；It can be fast by digital quantity I/O interface
The trend for detecting electric energy meter of speed changes information notice plant stand terminal, and plant stand terminal is instantaneously freezed by the broadcast with serial number
Order, quickly will all tables synchronize and freeze, then in the freezing data for reading all tables, cleverly solve data and
When property problem and stationary problem.
Detailed description of the invention
Fig. 1 is architecture diagram of the invention.
Fig. 2 is the typical main electrical scheme schematic diagram of power plant.
Fig. 3 is electric energy meter trend detection procedure figure.
Fig. 4 is electric energy meter communication flow figure.
Fig. 5 is plant stand terminal real time monitoring flow chart.
Specific embodiment
As shown in Fig. 1,2,3,4,5, a kind of method that electric quantity data acquisition passes through in power plant, includes electric energy meter 1 and plant stand
Terminal 2, the electric energy meter 1 tell electric energy power flow changing and notify plant stand terminal 2, plant stand terminal 2 to connect by digital quantity I/O
It receives after the digital quantity I/O signal of the initiation of electric energy meter 1 to all electric energy meters 1 while sending out freeze command instantaneous, electric energy meter 1 receives
Current electric quantity information is stored after instantaneous freeze command immediately, plant stand terminal 2 reads the newly-increased instantaneous freezing data of all electric energy meters 1
Out, the data set for passing through coulometric analysis calculating is generated.
The electric energy meter 1 is to have the function of that real-time electrical energy measurement, electric energy trend differentiate function, trend changes digital quantity I/
The electric energy meter 1 of O Interface and instantaneous freezing function.
The real-time electrical energy measurement function is real-time accumulated positive active energy, reversed reactive energy, four-quadrant is idle
Electric energy.
It is real-time detection active energy trend that the electric energy trend, which differentiates function, is recorded when active energy trend changes
Electric energy trend, which changes event and changes digital quantity I/O interface by trend immediately, exports trend change signal.
It is when active energy trend is that timing exports high level, when active electricity that the trend, which changes digital quantity I/O interface,
Energy trend exports low level when being negative.
The instantaneous freezing function refers to be freezed to wear immediately when receiving the instantaneous freeze command of the sending of plant stand terminal 2
More electricity calculates information, it is described pass through electricity calculate information include forward and reverse active energy with synchronize freeze serial number.
The plant stand terminal 2 is responsible for the monitoring collection function of electric energy meter 1, including flow state monitoring function, initiation number
According to freezing function, freezing data read functions.
The flow state monitoring function is realized by Multipath digital quantity I/O interface, and Multipath digital quantity I/O interface is same
When receive the digital quantity signal that muti-piece electric energy meter 1 exports, determine that monitored electric energy trend changes when either signal changes
Become.
The initiation data-frozen function refers to when terminal determines that monitored electric energy trend changes, and leads to immediately
The instantaneous freeze command of RS485 communication bus broadcast transmission is crossed, subordinate's electric energy meter 1 is notified to carry out data-frozen, instantaneous freeze command
In freeze serial number with synchronizing, 1 use of electric energy meter, which synchronizes, to be freezed serial number and is stored in freezing data, and coulometric analysis is passed through
The synchronous mark of Shi Zuowei data.
The freezing data read functions refer to, pass through RS485 communication bus for all subordinaties after initiating data-frozen
The newly-increased freezing data of electric energy meter 1 is read, and generates data set.
The present invention includes electric energy meter 1, plant stand terminal 2 as can be seen from Figure 1.Electric energy meter 1 passes through RS485 and digital quantity I/O
The interaction of information is carried out with plant stand terminal 2.
As can be seen from Figure 2 the power station power plant Duo Tai machine, a plurality of external circuit are connected with house transformator by bus,
Each tie point configures one piece of electric energy meter 1, and all electric energy meters 1 are connected with plant stand terminal 2 again.
As can be seen from Figure 31 real time measure of electric energy meter and detection electric energy direction of tide, when electric energy direction of tide changes
Produce logout and digital quantity I/O output.
As can be seen from Figure 4 electric energy meter 1 supports that receiving band serial number broadcasts instantaneous freeze command and freezing data reading life
It enables.Freeze current electric quantity and serial number immediately when receiving freeze command instantaneous with serial number, when receiving freezing data reading order
Return to freezing data.
As can be seen from Figure 5 plant stand terminal 2 monitors flow state in real time, when any state change occurs, to all
Freeze command send out instantaneous in table broadcast, reads the freezing data that all tables increase newly after sending order a period of time, and carry out trend
Effective judgement is conjugated, if it is determined that valid data then store trend displacement event and freezing data.
Claims (6)
1. a kind of method that electric quantity data acquisition passes through in power plant, it is characterised in that: it include electric energy meter and plant stand terminal, it is described
Electric energy meter tells electric energy power flow changing and notifies plant stand terminal, plant stand terminal to receive electric energy meter initiation by digital quantity I/O
Digital quantity I/O signal after to all electric energy meters send out freeze command instantaneous simultaneously, electric energy meter is stood after receiving instantaneous freeze command
Current electric quantity information is stored, the newly-increased instantaneous freezing data of all electric energy meters is read, generated for passing through electricity by plant stand terminal
Measure the data set of analytical calculation.
2. the method that electric quantity data acquisition passes through in a kind of power plant according to claim 1, it is characterised in that: the electric energy
The real-time accumulated positive active energy of table, reversed reactive energy and four-quadrant reactive energy, real-time detection active energy trend, when having
Record electric energy trend changes event and changes digital quantity I/O interface output trend by trend immediately and changes when function electric energy trend changes
Varying signal；When active energy trend is timing, output high level exports low level when active energy trend is negative；It is receiving
Freeze to pass through electricity immediately when the instantaneous freeze command issued to plant stand terminal and calculate information, the electricity that passes through calculates information
Including forward and reverse active energy with synchronize freeze serial number.
3. the method that electric quantity data acquisition passes through in a kind of power plant according to claim 2, it is characterised in that: the plant stand
Terminal is responsible for the monitoring collection of electric energy meter, including flow state monitoring, initiation data-frozen and freezing data are read.
4. the method that electric quantity data acquisition passes through in a kind of power plant according to claim 3, it is characterised in that: the trend
Condition monitoring is realized by Multipath digital quantity I/O interface, and Multipath digital quantity I/O interface receives the output of muti-piece electric energy meter simultaneously
Digital quantity signal determines that monitored electric energy trend changes when either signal changes.
5. the method that electric quantity data acquisition passes through in a kind of power plant according to claim 4, it is characterised in that: the initiation
Data-frozen refers to when terminal determines that monitored electric energy trend changes, and passes through RS485 communication bus broadcast hair immediately
Instantaneous freeze command is sent, subordinate's electric energy meter is notified to carry out data-frozen, has to synchronize in instantaneous freeze command and freezes serial number, it is described
Electric energy meter freeze serial number and be stored in freezing data using synchronizing, pass through mark synchronous as data when coulometric analysis.
6. the method that electric quantity data acquisition passes through in a kind of power plant according to claim 5, it is characterised in that: described freezes
Reading data is read the newly-increased freezing data of all subordinate's electric energy meters by RS485 communication bus after referring to initiation data-frozen
Out, data set is generated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811508997.6A CN109637109A (en) | 2018-12-11 | 2018-12-11 | A kind of method that electric quantity data acquisition passes through in power plant |
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| CN201811508997.6A CN109637109A (en) | 2018-12-11 | 2018-12-11 | A kind of method that electric quantity data acquisition passes through in power plant |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824242A (en) * | 2019-10-25 | 2020-02-21 | 国网四川省电力公司成都供电公司 | Metering method and system for eliminating ride-through power |
| CN112345998A (en) * | 2020-09-15 | 2021-02-09 | 中国电力科学研究院有限公司 | Electric energy metering system and method under complex operation state of power grid |
| CN113125848A (en) * | 2021-03-10 | 2021-07-16 | 国家电网有限公司华东分部 | Method and system for measuring through electric quantity of power supply plant and method for settling electric quantity |
| CN113162033A (en) * | 2021-04-07 | 2021-07-23 | 国网山东省电力公司营销服务中心(计量中心) | Automatic identification method and system for distribution network district topological relation based on frozen current |
| CN114236229A (en) * | 2021-11-24 | 2022-03-25 | 国网山东省电力公司日照供电公司 | Metering method of settlement electric quantity for power plant |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824242A (en) * | 2019-10-25 | 2020-02-21 | 国网四川省电力公司成都供电公司 | Metering method and system for eliminating ride-through power |
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| CN112345998B (en) * | 2020-09-15 | 2022-10-18 | 中国电力科学研究院有限公司 | Electric energy metering system and method under complex operation state of power grid |
| CN113125848A (en) * | 2021-03-10 | 2021-07-16 | 国家电网有限公司华东分部 | Method and system for measuring through electric quantity of power supply plant and method for settling electric quantity |
| CN113162033A (en) * | 2021-04-07 | 2021-07-23 | 国网山东省电力公司营销服务中心(计量中心) | Automatic identification method and system for distribution network district topological relation based on frozen current |
| CN114236229A (en) * | 2021-11-24 | 2022-03-25 | 国网山东省电力公司日照供电公司 | Metering method of settlement electric quantity for power plant |
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Application publication date: 20190416 |