CN109490617A - A kind of multifunctional household electrical power metering systems and its metering method - Google Patents
A kind of multifunctional household electrical power metering systems and its metering method Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
本发明提供了一种多功能家庭用电功率计量系统，所述功率计量系统包括信号采集单元、A/D转换单元、控制处理单元、显示单元、存储单元、按键输入单元、报警单元和通信单元；所述功率计量系统将所述信号采集单元采集的信号进行A/D转换后输至所述控制处理单元，再进行分析计算，得到所述佳通用点的功率信息和畸变率，能够准确的计算所述家庭用电功率，同时当所述畸变率高于报警值时，及时发出报警。本发明提供一种多功能家庭用电功率计量系统和方法，能够解决因电气设备产生的谐波而造成的计量不公平现象和无功占用现象，实现根据不同的功率进行合理收费。
The invention provides a multifunctional household electric power metering system, which comprises a signal acquisition unit, an A/D conversion unit, a control processing unit, a display unit, a storage unit, a key input unit, an alarm unit and a communication unit; The power metering system performs A/D conversion on the signal collected by the signal acquisition unit and then sends it to the control processing unit, and then analyzes and calculates to obtain the power information and distortion rate of the best common point, which can accurately calculate The household electric power, and at the same time when the distortion rate is higher than the alarm value, an alarm is issued in time. The invention provides a multifunctional household electric power metering system and method, which can solve the phenomenon of unfair metering and reactive power occupation caused by harmonics generated by electrical equipment, and realize reasonable charging according to different powers.
Description
Technical field
The invention belongs to electric-power metering technical field, in particular to a kind of multifunctional household electrical power metering systems and its
Metering method.
Background technique
With the continuous development of science and technology, more and more electrical equipments enter our life, and these electrical equipments
Certain harmonic wave can be generated in use, will lead to metering inaccuracy according to traditional electric energy gauging method, and then cause
Therefore the unfair of the electricity charge needs a kind of more accurate electric energy measuring equipment to meet the needs of electrical energy measurement.
The present invention proposes a kind of electric power calculation method, can not only calculate the active power of household electricity and idle
Power, additionally it is possible to calculate the dispersion power and bear that load conductance is generated different from the load equivalent conductance under harmonic frequency
Harmonic power caused by harmonic source is carried, power calculation is more accurately carried out, solution is made because of the harmonic wave that electrical equipment generates
At metering unjust phenomenon and idle occupancy phenomenon, realize and reasonable charge carried out according to different power.
Summary of the invention
The present invention provides a kind of multifunctional household electrical power metering systems and method, is able to solve because electrical equipment generates
Harmonic wave and caused by metering unjust phenomenon and idle occupancy phenomenon, realize and reasonable charge carried out according to different power.
The present invention is specially a kind of multifunctional household electrical power metering systems, and the power measurement system includes that signal is adopted
Collect unit, A/D converting unit, control processing unit, display unit, storage unit, key-press input unit, alarm unit and communication
Unit, the signal acquisition unit and the A/D converting unit, the control processing unit are linked in sequence, the control processing
Unit also respectively with the display unit, the storage unit, the key-press input unit, the alarm unit and the communication
Unit is connected；Signal that the signal acquisition unit acquires transport to after A/D conversion described by the power measurement system
Processing unit is controlled, then carries out analytical calculation, the power information and aberration rate of the good universe point is obtained, can accurately calculate
The household electricity power, while when the aberration rate is higher than alarming value, alarm is issued in time.
The signal acquisition unit acquires the current signal of the household electricity using current transformer, using mutual induction of voltage
Device collection voltages signal, and the control processing unit is transported to after the A/D converting unit carries out A/D conversion.
The key-press input unit carries out parameter setting, the parameter packet in conjunction with the storage unit and the display unit
Include voltage total harmonic distortion factor alarming value and current total harmonic distortion rate alarming value；The communication unit uses optical fiber by the function
The data information of rate metering system is uploaded to power supply company's metering system, and technology can receive the power supply by wireless communication
The control instruction and progress parameter setting of company.
The control processing unit calculates the household electricity frequency, including phase discriminator software, low pass filtered using phaselocked loop
Wave device software, voltage controlled oscillator software, the phase discriminator software and the low-pass filter software, the voltage controlled oscillator software
Sequence calculates, and the phase discriminator software inputs the voltage signal and the voltage controlled oscillator output signal, the voltage controlled oscillation
Device output signal, it is described voltage-controlled when the voltage controlled oscillator output signal is synchronous with the filter unit phase of output signal
Oscillator output signal frequency is the household electricity frequency signal.
The present invention also provides a kind of metering method of multifunctional household electrical power metering systems, the metering method includes
Following steps:
Step (1): the household electricity current signal and voltage signal are acquired；
Step (2): A/D conversion is carried out by the A/D converting unit；
Step (3): the voltage signal frequency and the voltage controlled oscillator software are calculated by the phase discriminator software
Output signal frequency difference, the voltage controlled oscillator software output signal frequency initial value is zero；
Step (4): filtering out high fdrequency component by the low-pass filter software, obtains the adjustment voltage controlled oscillator
The voltage of software frequency；
Step (5): the voltage controlled oscillator software output frequency signal is controlled to the letter for inputting the control processing unit
Number frequency is drawn close, and until frequency is identical, Phase synchronization at this time, loop is locked, obtains the household electricity electric voltage frequency
f；
Step (6): the current signal i is converted toI0For DC current
Component, h=1,2,3, N be fundamental wave and overtone order set,For the current vector of h subharmonic, IhFor h
The current effective value of subharmonic, the π of ω=2 f are angular frequency；
Step (7): the voltage signal u is converted toU0For DC voltage
Component,For the voltage vector of h subharmonic, UhFor the voltage effective value of h subharmonic；
Step (8): susceptance of the computational load under DC component
Step (9): admittance of the computational load under each harmonic frequencyGhFor harmonic voltage effect
Susceptance on linear load, jBhThe susceptance on nonlinear load is acted on for harmonic voltage；
Step (10): watt current i is calculatedp=GeU, GeFor the equivalent conductance of load；
Step (11): reactive current is calculated
Step (12): the scattered current that load conductance under harmonic frequency is different from the load equivalent conductance and generates is calculated
Step (13): harmonic current i caused by computational load harmonic sourceg=i-ip-iq-is；
Step (14): calculating active-power P=| | u | | | | ip| |, reactive power Q=| | u | | | | iq| |, disperse function
Rate Ps=| | u | | | | is| |, harmonic power Pg=| | u | | | | ig||；
Step (15): apparent energy is calculated
Step (16): voltage total harmonic distortion factor is calculatedU1For fundamental voltage；
Step (17): the voltage total harmonic distortion factor is compared with the voltage total harmonic distortion factor alarming value,
If more than the voltage total harmonic distortion factor alarming value, the total harmonic wave of voltage is issued by the alarm unit and the display unit
Distort alarm signal；
Step (18): calculating current total harmonic distortion factorI1For fundamental current；
Step (19): electric current pressure total harmonic distortion factor is compared with the current total harmonic distortion rate alarming value
Compared with total by the alarm unit and display unit sending electric current if more than the current total harmonic distortion rate alarming value
Harmonic distortion alarm signal；
Step (20): the power supply company is uploaded to by the communication unit.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of multifunctional household electrical power metering systems of the present invention.
Fig. 2 is a kind of multifunctional household electrical power metering systems metering method flow chart of the present invention.
Specific embodiment
A kind of specific embodiment of multifunctional household electrical power metering systems of the present invention is done in detail with reference to the accompanying drawing
It is thin to illustrate.
As shown in Figure 1, power measurement system of the invention includes signal acquisition unit, A/D converting unit, control processing list
Member, display unit, storage unit, key-press input unit, alarm unit and communication unit, the signal acquisition unit and the A/
D conversion unit, the control processing unit are linked in sequence, the control processing unit also respectively with the display unit, described
Storage unit, the key-press input unit, the alarm unit are connected with the communication unit；The power measurement system will
The signal of the signal acquisition unit acquisition transports to the control processing unit after carrying out A/D conversion, then carries out analytical calculation, obtains
To the power information and aberration rate of the good universe point, the household electricity power can be accurately calculated, while when described abnormal
When variability is higher than alarming value, alarm is issued in time.
The signal acquisition unit acquires the current signal of the household electricity using current transformer, using mutual induction of voltage
Device collection voltages signal, and the control processing unit is transported to after the A/D converting unit carries out A/D conversion.
The key-press input unit carries out parameter setting, the parameter packet in conjunction with the storage unit and the display unit
Include voltage total harmonic distortion factor alarming value and current total harmonic distortion rate alarming value；The communication unit uses optical fiber by the function
The data information of rate metering system is uploaded to power supply company's metering system, and technology can receive the power supply by wireless communication
The control instruction and progress parameter setting of company.
The control processing unit calculates the household electricity frequency, including phase discriminator software, low pass filtered using phaselocked loop
Wave device software, voltage controlled oscillator software, the phase discriminator software and the low-pass filter software, the voltage controlled oscillator software
Sequence calculates, and the phase discriminator software inputs the voltage signal and the voltage controlled oscillator output signal, the voltage controlled oscillation
Device output signal, it is described voltage-controlled when the voltage controlled oscillator output signal is synchronous with the filter unit phase of output signal
Oscillator output signal frequency is the household electricity frequency signal.
As shown in Fig. 2, the present invention also provides a kind of metering method of multifunctional household electrical power metering systems, the meter
Amount method includes the following steps:
Step (1): the household electricity current signal and voltage signal are acquired；
Step (2): A/D conversion is carried out by the A/D converting unit；
Step (3): the voltage signal frequency and the voltage controlled oscillator software are calculated by the phase discriminator software
Output signal frequency difference, the voltage controlled oscillator software output signal frequency initial value is zero；
Step (4): filtering out high fdrequency component by the low-pass filter software, obtains the adjustment voltage controlled oscillator
The voltage of software frequency；
Step (5): the voltage controlled oscillator software output frequency signal is controlled to the letter for inputting the control processing unit
Number frequency is drawn close, and until frequency is identical, Phase synchronization at this time, loop is locked, obtains the household electricity electric voltage frequency
f；
Step (6): the current signal i is converted toI0For direct current flow point
Amount, h=1,2,3, N be fundamental wave and overtone order set,For the current vector of h subharmonic, IhIt is h times
The current effective value of harmonic wave, the π of ω=2 f are angular frequency；
Step (7): the voltage signal u is converted toU0For DC voltage
Component,For the voltage vector of h subharmonic, UhFor the voltage effective value of h subharmonic；
Step (8): susceptance of the computational load under DC component
Step (9): admittance of the computational load under each harmonic frequencyGhFor harmonic voltage effect
Susceptance on linear load, jBhThe susceptance on nonlinear load is acted on for harmonic voltage；
Step (10): watt current i is calculatedp=GeU, GeFor the equivalent conductance of load；
Step (11): reactive current is calculated
Step (12): the scattered current that load conductance under harmonic frequency is different from the load equivalent conductance and generates is calculated
Step (13): harmonic current i caused by computational load harmonic sourceg=i-ip-iq-is；
Step (14): calculating active-power P=| | u | | | | ip| |, reactive power Q=| | u | | | | iq| |, disperse function
Rate Ps=| | u | | | | is| |, harmonic power Pg=| | u | | | | ig||；
Step (15): apparent energy is calculated
Step (16): voltage total harmonic distortion factor is calculatedU1For fundamental voltage；
Step (17): the voltage total harmonic distortion factor is compared with the voltage total harmonic distortion factor alarming value,
If more than the voltage total harmonic distortion factor alarming value, the total harmonic wave of voltage is issued by the alarm unit and the display unit
Distort alarm signal；
Step (18): calculating current total harmonic distortion factorI1For fundamental current；
Step (19): electric current pressure total harmonic distortion factor is compared with the current total harmonic distortion rate alarming value
Compared with total by the alarm unit and display unit sending electric current if more than the current total harmonic distortion rate alarming value
Harmonic distortion alarm signal；
Step (20): the power supply company is uploaded to by the communication unit.
Finally it should be noted that only illustrating technical solution of the present invention rather than its limitations in conjunction with above-described embodiment.Institute
The those of ordinary skill in category field is it is to be understood that those skilled in the art can repair a specific embodiment of the invention
Change or equivalent replacement, but these modifications or change are being applied among pending claims.
Claims (5)
1. a kind of multifunctional household electrical power metering systems, which is characterized in that the power measurement system includes signal acquisition
Unit, A/D converting unit, control processing unit, display unit, storage unit, key-press input unit, alarm unit and communication unit
Member, the signal acquisition unit and the A/D converting unit, the control processing unit are linked in sequence, and the control processing is single
Member also respectively with the display unit, the storage unit, the key-press input unit, the alarm unit and the communication unit
Member is connected；The power measurement system transports to the control after the signal that the signal acquisition unit acquires is carried out A/D conversion
Processing unit processed, then analytical calculation is carried out, the power information and aberration rate of the good universe point are obtained, institute can be accurately calculated
Household electricity power is stated, while when the aberration rate is higher than alarming value, issuing alarm in time.
2. a kind of multifunctional household electrical power metering systems according to claim 1, which is characterized in that the signal is adopted
Collection unit acquires the current signal of the household electricity using current transformer, using voltage transformer collection voltages signal, and
The control processing unit is transported to after the A/D converting unit carries out A/D conversion.
3. a kind of multifunctional household electrical power metering systems according to claim 2, which is characterized in that the key is defeated
Enter unit and carry out parameter setting in conjunction with the storage unit and the display unit, the parameter includes voltage total harmonic distortion factor
Alarming value and current total harmonic distortion rate alarming value；The communication unit is believed the data of the power measurement system using optical fiber
Breath is uploaded to power supply company's metering system, and can by wireless communication technology receive the power supply company control instruction and into
Row parameter setting.
4. a kind of multifunctional household electrical power metering systems according to claim 3, which is characterized in that at the control
It manages unit and the household electricity frequency, including phase discriminator software, low-pass filter software, voltage controlled oscillator is calculated using phaselocked loop
Software, the phase discriminator software and the low-pass filter software, voltage controlled oscillator software sequence calculate, the phase discriminator
Software inputs the voltage signal and the voltage controlled oscillator output signal, the voltage controlled oscillator output signal, when the pressure
When control oscillator output signal is synchronous with the filter unit phase of output signal, the voltage controlled oscillator output signal frequency is
The household electricity frequency signal.
5. the metering method of multifunctional household electrical power metering systems described in any one of -4 according to claim 1,
It is characterized in that, the metering method includes the following steps:
Step (1): the household electricity current signal and voltage signal are acquired；
Step (2): A/D conversion is carried out by the A/D converting unit；
Step (3): the voltage signal frequency is calculated by the phase discriminator software and the voltage controlled oscillator software exports
Signal frequency difference, the voltage controlled oscillator software output signal frequency initial value is zero；
Step (4): filtering out high fdrequency component by the low-pass filter software, obtains the adjustment voltage controlled oscillator software
The voltage of frequency；
Step (5): the voltage controlled oscillator software output frequency signal is controlled to the signal frequency for inputting the control processing unit
Rate is drawn close, and until frequency is identical, Phase synchronization, loop are locked at this time, obtains the household electricity electric voltage frequency f；
Step (6): the current signal i is converted toI0For direct-current component, h
=1,2,3, N be fundamental wave and overtone order set,For the current vector of h subharmonic, IhFor h subharmonic
Current effective value, the π of ω=2 f be angular frequency；
Step (7): the voltage signal u is converted toU0For DC voltage point
Amount,For the voltage vector of h subharmonic, UhFor the voltage effective value of h subharmonic；
Step (8): susceptance of the computational load under DC component
Step (9): admittance of the computational load under each harmonic frequencyGhIt is online for harmonic voltage effect
Property load on susceptance, jBhThe susceptance on nonlinear load is acted on for harmonic voltage；
Step (10): watt current i is calculatedp=GeU, GeFor the equivalent conductance of load；
Step (11): reactive current is calculated
Step (12): the scattered current that load conductance under harmonic frequency is different from the load equivalent conductance and generates is calculated
Step (13): harmonic current i caused by computational load harmonic sourceg=i-ip-iq-is；
Step (14): calculating active-power P=| | u | | | | ip| |, reactive power Q=| | u | | | | iq| |, disperse power Ps
=| | u | | | | is| |, harmonic power Pg=| | u | | | | ig||；
Step (15): apparent energy is calculated
Step (16): voltage total harmonic distortion factor is calculatedU1For fundamental voltage；
Step (17): the voltage total harmonic distortion factor is compared with the voltage total harmonic distortion factor alarming value, if greatly
In the voltage total harmonic distortion factor alarming value, the total harmonic distortion of voltage is issued by the alarm unit and the display unit
Alarm signal；
Step (18): calculating current total harmonic distortion factorI1For fundamental current；
Step (19): electric current pressure total harmonic distortion factor is compared with the current total harmonic distortion rate alarming value, if
Greater than the current total harmonic distortion rate alarming value, it is abnormal that current total harmonic is issued by the alarm unit and the display unit
Become alarm signal；
Step (20): the power supply company is uploaded to by the communication unit.
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