CN109490622A - A kind of electricity data calibration technology based on tri-state information - Google Patents
A kind of electricity data calibration technology based on tri-state information Download PDFInfo
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Abstract
The present invention relates to the more data check fields of power grid, more particularly to a kind of electricity data calibration technology based on tri-state information.Power grid transient state, dynamic, stable state and electricity model are constructed first, the objective function of new accurate all-wave active power and time are fitted to by the stable state all-wave active power of acquisition and the active power information of dynamic fundamental wave, and then verify the amplitude of electricity；And virtual value is converted by voltage, the current information of the transient state acquired and is fitted to the objective function of active power and time, the acquisition information of the objective function and electricity that are converted into electricity and time is compared, and then verifies the time offset of electricity.Final realization power grid tri-state information rejects the data point of electric quantity acquisition mistake to the verification of the amplitude accuracy of electricity and the calculating of time offset.
Description
Technical field
The present invention relates to the electricity datas of Operation of Electric Systems control tri-state information to verify field, in particular to one kind is based on
The electricity data calibration technology of tri-state information.
Background technique
Development with China constantly to intelligent society, the trend that the electricity consumption in China also gradually rises in presentation.Electricity
Force system, which provides electric energy, can not only ensure national wealth safety, even more closely bound up with the daily life of our people.So
Electric system can be reliable and stable operation, be vital.Network operation efficiency is improved, first has to improve in electric system
The accuracy of data, it is seen that the data check of power grid is very important, however the accuracy of current power grid acquisition data is not
Height, and electric quantity acquisition has time deviation, so having to improve the multidata checking feature of power grid.
Electric network data acquisition has the characteristics of various information, each information has oneself, in the application of power grid, Various types of data
It applies in different places.With the continuous development of power grid, electric network composition is increasingly sophisticated, and electrical network capacity constantly expands, and needs reality
When the information content of data volume and storage that transmits increase at double.Due to the intrinsic dispersibility of these data, isomerism, it is readable with
And inconsistency, Various types of data are easy to appear mistake and deviation, promote people accurate to the data of grid automation operating system
Property verification more stringent requirements are proposed.When current data monitoring system finds quality of data exception, due to lacking effective prison
Survey technology means often can only by virtue of experience analyze failure, and blindness is big, be the efficient fortune of power grid to influence troubleshooting
Row brings security risk.
It is well known that mains by harmonics content improves year by year, there is no electricity data check system before, so to production process
The problems in not can be carried out the analysis of quantization, so that solution cannot be proposed in time.In response to this, one kind is researched and developed to be based on
The electricity data calibration technology of tri-state information, to greatly accelerate the integrated management and checking feature of information about power.
The tri-state information of power grid includes power grid transient information, steady state information and multidate information.The transient information of power grid refers to
In a cycle, information between two collection points is the information of all-wave, its main feature is that collection point is more, but precision is low；Power grid
Steady state information refer to the information in the acquisition of 20 cycles, be the information of all-wave, its main feature is that collection point is few, but precision is high；
The multidate information of power grid refers to the information in the acquisition of a cycle, is the information of fundamental wave.In addition, the acquisition of electricity is non real-time
, its main feature is that acquisition precision is high, but there is time migration.
Current technology and patent seldom specially study the method for calibration of electricity data, general data check side
Method is not associated with the rule and feature of actual electric network operation, and method of calibration is not very practical.The present invention is for data quality control and fastly
Speed rejects wrong electric quantity acquisition point and provides the technological means and method of a kind of verification, also provides one for production dispatcher
Powerful analysis and diagnosis method.
Summary of the invention
Goal in research of the invention are as follows: the present invention takes full advantage of each letter by the mutual verification between Various types of data
The acquisition advantageous features for ceasing itself propose the electricity calibration technology based on tri-state information.It is active by the stable state all-wave of acquisition
The active power information of power and dynamic fundamental wave is obtained humorous with the active power that the active power of stable state all-wave subtracts dynamic fundamental wave
The active power of wave and m-Acetyl chlorophosphonazo, then the active power of harmonic wave and m-Acetyl chlorophosphonazo is intended again plus the active power of dynamic fundamental wave
The objective function of synthesis new accurate dynamic all-wave active power and time, and it is big by the amplitude that calculating integral obtains electricity
It is small, it is compared with the information of the same period of electric quantity acquisition, and then verify the amplitude of electricity；And pass through the transient state of acquisition
Voltage, current information and the virtual value that voltage and current is converted by mathematical computations, and the active power of transient state is calculated,
It is fitted to the objective function of active power and time, is converted into the objective function of electricity and time by calculating functional integration,
It is compared with the acquisition information of electricity, and then verifies the time offset of electricity, and reject the data of electric quantity acquisition mistake
Point.
The technical scheme is that
A kind of electricity data calibration technology based on tri-state information, includes the following steps:
Step 1: proposing that the concept of tri-state information and electricity data, tri-state information involved in description of the invention refer to electricity
Transient information, steady state information and the multidate information of net.The transient information of power grid refers in a cycle, between two collection points
Information, be the information of all-wave, its main feature is that collection point is more, but precision is low；The steady state information of power grid refers in 20 cycles
The information of acquisition is the information of all-wave, its main feature is that collection point is few, but precision is high；The multidate information of power grid referred in a week
The information of wave acquisition, is the information of fundamental wave.Electricity data involved in description of the invention refers to electricity and the time of acquisition
Information.
Step 2: the acquisition of basic data.Data are acquired by electric network data information system.Including: power grid transient state electricity
Stream, voltage and time acquisition curve, the acquisition curve of Power System Steady-state, dynamic active power and time, power grid electric and when
Between acquisition curve.
Step 3: establishing dynamic, stable state using time and actually measured active power data information as horizontal axis and the longitudinal axis respectively
And the objective function of electricity, it is expressed as follows:
Pw-Pd=Px
Δ W=W2-W1
Wherein: PwFor the t of stable state1The active power at moment, PdFor dynamic t1The active power at moment, PxFor t1Shi Keyou
The harmonic wave and m-Acetyl chlorophosphonazo component of function power, W1For t1The electricity of moment acquisition, W2For t2The electricity and t of moment acquisition2> t1, Δ W
For t1Moment is to t2The electricity that moment generates.
Step 4: establishing objective function, the accurate waveform of dynamic waveform graph Cheng Xin is combined with the waveform diagram of stable state
Figure, and then electricity is verified, the objective function is expressed as follows:
F (x)=Px+Pd
ΔW≈Wq
Wherein: f (x) is the fundametal compoment of dynamic active power and the all-wave objective function of stable state harmonic component synthesis, Px
For t1The harmonic wave and m-Acetyl chlorophosphonazo component of moment active power, PdFor dynamic t1The active power at moment.WqFor calculate from
t1Moment is to t2The electricity that moment generates.By comparing calculated electricity WqWith the electricity Δ W of actual acquisition, electricity is verified
Amplitude accuracy.
By the stable state all-wave active power of acquisition and the active power information of dynamic fundamental wave, with the wattful power of stable state all-wave
The active power that rate subtracts dynamic fundamental wave obtains the active power of harmonic wave and m-Acetyl chlorophosphonazo, then the active power harmonic wave and m-Acetyl chlorophosphonazo
In addition the active power of dynamic fundamental wave, is fitted to the objective function of new accurate dynamic all-wave active power and time again,
And the amplitude size of electricity is obtained by calculating integral, it is compared with the information of the same period of electric quantity acquisition, and then school
The amplitude of electrical verification amount.
Step 5: being established temporarily using the Temporal Data information of time and actually measured voltage, electric current as horizontal axis and the longitudinal axis respectively
The objective function of state, is expressed as follows:
Wherein Um1For the t of transient state1The voltage value of moment acquisition, α are the t of transient state1The angle of moment collection voltages value, U1For
t1The voltage effective value at moment, Im1For the t of transient state1The current value of moment acquisition, β are the t of transient state1The angle of the electric current of moment acquisition
Degree, I1For t1The current effective value at moment.
Step 6: establishing equation, solve information about power using the voltage and current of transient state, and then verify the time of electricity
Offset, the equation are expressed as follows:
P=U1I1cos(α-β)
T=| Tz-Tw|
Wherein P is t1The active power at moment, f (p) is the transient state time fitted and active power is horizontally and vertically
Objective function, f (wz) it is the electric quantity function image fitted, TzFor the time point of transient state, TwIt is actually measured electric with transient state
It measures equal time point, T is the time offset acquired.
Step 7: by the voltage of the transient state of acquisition, current information and being converted into voltage and current by mathematical computations
Virtual value, and the active power of transient state is calculated, it is fitted to the objective function of active power and time, by calculating functional integration
It is compared come the acquisition information of the objective function and electricity that are converted into electricity and time, and then verifies the time migration of electricity
Amount, and the data point of electric quantity acquisition mistake is rejected.
Beneficial effect
The present invention proposes a kind of electricity calibration technology based on tri-state information, each according to power grid transient state, stable state, multidate information
The characteristics of from the time accuracy and accuracy of acquisition, proposes a kind of amplitude of verification electric quantity acquisition information that respectively cooperates
The calibration technology of accuracy and electricity time deviation for data quality control and quickly rejects wrong electric quantity acquisition point and provides one
The technological means and method of kind verification also provide a powerful analysis and diagnosis method for production dispatcher.Electricity
Analysis of the accuracy be the key point bearing power supply enterprise and reliably developing, to Power Enterprise project investment, production pass through
Battalion's management etc. has great meaning.
It can make electricity power enterprise by data analysis, it is accurate to grasp the information for using electric consumption and power quality, by taking
Effective measures reduce equipment fault, have been pushed further into the realization of energy efficiency target, and power plant is promoted to carry out energy-saving work
Make, improves the economic benefit of enterprise, and the economic security of power plant is promoted to run.Increase the prison to utility network power quality
Superintend and direct management, General Promotion Automation of Electric Systems management level also provides guarantee for electric power netting safe running.And by means of letter
The foundation of the information platforms such as breath technology, network technology greatly improves the verification of electricity power enterprise's power quality and information about power
The effect of acquisition and integrated management, improves the level of business electrical management.
Detailed description of the invention
Fig. 1 is the acquisition image of stable state all-wave active power.
Fig. 2 is the acquisition image of dynamic fundamental active power.
Fig. 3 is dynamic all-wave active power image.
Fig. 4 is electric quantity acquisition image.
Fig. 5 is transient voltage acquisition image
Fig. 6 is transient current acquisition image
Fig. 7 is transient state active power image
Fig. 8 is the fitting of the electricity image and electric quantity acquisition image of transient state synthesis.
Specific embodiment
Specific implementation of the invention is described further with reference to the accompanying drawing.
To a kind of above-mentioned electricity calibration technology based on tri-state information, include the following steps:
Step 1: proposing that the concept of tri-state information and electricity data, tri-state information involved in description of the invention refer to electricity
Transient information, steady state information and the multidate information of net.The transient information of power grid refers in a cycle, between two collection points
Information, be the information of all-wave, its main feature is that collection point is more, but precision is low；The steady state information of power grid refers in 20 cycles
The information of acquisition is the information of all-wave, its main feature is that collection point is few, but precision is high；The multidate information of power grid referred in a week
The information of wave acquisition, is the information of fundamental wave.Electricity data involved in description of the invention refers to electricity and the time of acquisition
Information.
Step 2: basic data is collected, predicts and is counted.Acquisition including Power System Steady-state, dynamic active power and time
Curve, power grid transient current, voltage and the acquisition of time curve, power grid electric and the acquisition curve of time as shown in Figure 1, Figure 2, Fig. 4,
Fig. 5 and Fig. 6.
Step 3: step 3: establishing and move using time and actually measured active power data information as horizontal axis and the longitudinal axis respectively
The objective function of state, stable state and electricity, is expressed as follows:
Pw-Pd=Px
Δ W=W2-W1
Wherein: PwFor the t of stable state1The active power at moment, PdFor dynamic t1The active power at moment, PxFor t1Shi Keyou
The harmonic wave and m-Acetyl chlorophosphonazo component of function power, W1For t1The electricity of moment acquisition, W2For t2The electricity and t of moment acquisition2> t1, Δ W
For t1Moment is to t2Electricity such as Fig. 4 that moment generates.
Step 4: establishing objective function, the accurate waveform of dynamic waveform graph Cheng Xin is combined with the waveform diagram of stable state
Figure, and then electricity is verified, the objective function is expressed as follows:
F (x)=Px+Pd
ΔW≈Wq
Wherein: f (x) is the fundametal compoment of dynamic active power and the all-wave objective function of stable state harmonic component synthesis, Px
For t1The harmonic wave and m-Acetyl chlorophosphonazo component of moment active power, PdFor dynamic t1The active power at moment.WqFor calculate from
t1Moment is to t2Electricity such as Fig. 3 that moment generates.By comparing calculated electricity WqWith the electricity Δ W of actual acquisition, verification electricity
The amplitude accuracy of amount.
Step 5: being established temporarily using the Temporal Data information of time and actually measured voltage, electric current as horizontal axis and the longitudinal axis respectively
The objective function of state, is expressed as follows:
Wherein Um1For the t of transient state1The voltage value of moment acquisition, α are the t of transient state1The angle of moment collection voltages value, U1For
t1The voltage effective value at moment, Im1For the t of transient state1The current value of moment acquisition, β are the t of transient state1The angle of the electric current of moment acquisition
Degree, I1For t1The current effective value at moment such as Fig. 5, Fig. 6.
Step 6: establishing equation, solve information about power using the voltage and current of transient state, and then verify the time of electricity
Offset, the equation are expressed as follows:
P=U1I1cos(α-β)
T=| Tz-Tw|
Wherein P is t1The active power at moment, f (p) is the transient state time fitted and active power is horizontally and vertically
Objective function, f (wz) it is the electric quantity function image fitted, TzFor the time point of transient state, TwIt is actually measured electric with transient state
It measures equal time point, T is time offset such as Fig. 7, the Fig. 8 acquired.
Step 7: by the voltage of the transient state of acquisition, current information and being converted into voltage and current by mathematical computations
Virtual value, and the active power of transient state is calculated, it is fitted to the objective function of active power and time, by calculating functional integration
It is compared come the acquisition information of the objective function and electricity that are converted into electricity and time, and then verifies the time migration of electricity
Amount, and the data point of electric quantity acquisition mistake is rejected.
It is analyzed below by way of specific experiment:
Collecting the active power that stable state all-wave acquired at 0 second is 170kw, and the active power of dynamic fundamental wave acquisition is
130kw, the active power that stable state all-wave acquired at 0.4 second are 587kw, and the active power of dynamic fundamental wave acquisition is 442kw.
Pw1-Pd1=Px1 Pw2-Pd20=Px2
170-130=40 (kw) 587-442=145 (kw)
The amount that 0 second time-harmonic wave and m-Acetyl chlorophosphonazo are found out in formula is 40kw, is 145kw in the amount of 0.4 second time-harmonic wave and m-Acetyl chlorophosphonazo.
0 second time-harmonic wave is found out in formula and m-Acetyl chlorophosphonazo accounts for the 0.31 of fundamental wave amount, accounts for fundamental wave in 0.4 second time-harmonic wave and m-Acetyl chlorophosphonazo
The 0.33 of amount.
Harmonic wave is found out in formula and m-Acetyl chlorophosphonazo average every 0.02 second rises 0.11%.
Pdq1=Pd1+Px1 Pdq2=Pd2+Px1*(1+c)
130+40=170 (kw) 180+40* (1+0.0011)=220.044 (kw)
Wq=(170+220.044)/180000*2=0.0011 (kw*h)
It is 170kw that the dynamic all-wave active power at 0 second is found out in formula, and at 0.02 second, dynamic all-wave active power was
220.044kw.In 0 to 0.02 second, electric quantity change 0.0011kw*h.
W=0.065t+150
As t=0.02s, W=150.0013
Δ W=150.0013-150=0.0013
∴ Δ W > Wq
It is 150kw*h in 0 minute collected electricity, at 1 minute, collected electricity was 150.065kw*h, in formula
The fit object function for finding out electricity is to find out when the time is 0.02s, and electricity 150.0013kw*h is found out 0 to 0.02
Compared with the electric quantity change amount of second is made for 0.0013kw*h with the electric quantity change amount found out, and then verify the amplitude of electricity.
By being tested based on the data shown by the information about power method of calibration of power grid three-state data by acquisition above
It calculates, can accurately, effectively verify the amplitude size and time deviation of electricity, be data quality control and quickly reject mistake electricity
Amount collection point provides the technological means and method of a kind of verification, also provides a powerful point for production dispatcher
Diagnostic method is analysed, to greatly accelerate the integrated management and data check ability of information about power.The analysis of the accuracy of electricity is
The key point that power supply enterprise reliably develops is born, is had emphatically to Power Enterprise project investment, Production&Operations Management etc.
Big meaning.
Claims (8)
1. a kind of electricity data calibration technology based on tri-state information, which comprises the steps of: step 1: proposing three
The concept of state information and electricity data；Step 2: model basic data is collected, predicts and is counted；Step 3: respectively with time and reality
The active power data information that border measures is the objective function that horizontal axis and the longitudinal axis establish dynamic, stable state and electricity；Step 4: establishing
Objective function combines the accurate waveform diagram of dynamic waveform graph Cheng Xin with the waveform diagram of stable state, and then verifies electricity；Step
5: establishing as horizontal axis and the longitudinal axis target letter of transient state using the Temporal Data information of time and actually measured voltage, electric current respectively
Number；Step 6: establishing equation, solve information about power using the voltage and current of transient state, and then verify the time migration of electricity
Amount.Step 7: calculating the active power of transient state.
2. a kind of electricity data calibration technology based on tri-state information as described in claim 1, it is characterised in that: the step
1 tri-state information refers to the transient information, steady state information and multidate information of power grid；The transient information of power grid refers in a cycle
Interior, between two collection points information, is the information of all-wave, its main feature is that collection point is more, but precision is low；The steady state information of power grid
Refer to the information in the acquisition of 20 cycles, be the information of all-wave, its main feature is that collection point is few, but precision is high；The dynamic of power grid
Information refers to the information in the acquisition of a cycle, is the information of fundamental wave.
3. a kind of electricity data calibration technology based on tri-state information as claimed in claim 1 or 2, it is characterised in that: described
It includes power grid transient current, voltage and the acquisition of time curve that step model basic data, which is collected, Power System Steady-state, dynamic active
The acquisition curve of the acquisition curve of power and time, power grid electric and time.
4. a kind of electricity data calibration technology based on tri-state information as claimed in any one of claims 1-3, feature exist
In: the objective function of the dynamic of power grid described in step 3, stable state and electricity is expressed as follows:
Pw-Pd=Px
Δ W=W2-W1
Wherein: PwFor the t of stable state1The active power at moment, PdFor dynamic t1The active power at moment, PxFor t1Moment wattful power
The harmonic wave and m-Acetyl chlorophosphonazo component of rate, W1For t1The electricity of moment acquisition, W2For t2The electricity and t of moment acquisition2> t1, Δ W is t1
Moment is to t2The electricity that moment generates.
5. a kind of electricity data calibration technology based on tri-state information according to any one of claims 1-4, feature
Be: objective function described in step 4 is expressed as follows:
F (x)=Px+Pd
ΔW≈Wq
Wherein: f (x) is the fundametal compoment of dynamic active power and the all-wave objective function of stable state harmonic component synthesis, PxFor t1When
Carve the harmonic wave and m-Acetyl chlorophosphonazo component of active power, PdFor dynamic t1The active power at moment.WqFor the slave t calculated1Moment
To t2The electricity that moment generates.
6. a kind of electricity data calibration technology based on tri-state information, feature described in -5 any one according to claim 1
Be: voltage described in step 5, electric current Temporal Data information be that horizontal axis and the longitudinal axis are established the objective function of transient state and indicated such as
Under:
Wherein Um1For the t of transient state1The voltage value of moment acquisition, α are the t of transient state1The angle of moment collection voltages value, U1For t1When
The voltage effective value at quarter, Im1For the t of transient state1The current value of moment acquisition, β are the t of transient state1The angle of the electric current of moment acquisition, I1
For t1The current effective value at moment.
7. according to claim 1 based on the electricity data calibration technology of tri-state information described in -6 any one, it is characterised in that:
Voltage and current described in step 6 using transient state solves information about power and is expressed as follows:
P=U1I1cos(α-β)
T=| Tz-Tw|
Wherein P is t1The active power at moment, f (p) is the transient state time fitted and active power is target horizontally and vertically
Function, f (wz) it is the electric quantity function image fitted, TzFor the time point of transient state, TwIt is actually measured equal with transient state electricity
Time point, T is the time offset acquired.
8. according to claim 1 based on the electricity data calibration technology of tri-state information described in -7 any one, it is characterised in that:
Step 7 is converted into the virtual value of voltage and current by the voltage of the transient state acquired, current information and by mathematical computations, and
The active power for calculating transient state is fitted to the objective function of active power and time.
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| CN110427659A (en) * | 2019-07-13 | 2019-11-08 | 潍坊学院 | A kind of threephase asynchronous active power based on clustering determines method |
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