CN108107263A - A kind of public lighting circuit load attribute data acquisition device and determination methods - Google Patents
A kind of public lighting circuit load attribute data acquisition device and determination methods Download PDFInfo
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- CN108107263A CN108107263A CN201711141293.5A CN201711141293A CN108107263A CN 108107263 A CN108107263 A CN 108107263A CN 201711141293 A CN201711141293 A CN 201711141293A CN 108107263 A CN108107263 A CN 108107263A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/001—Measuring real or reactive component; Measuring apparent energy
- G01R21/002—Measuring real component
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/001—Measuring real or reactive component; Measuring apparent energy
- G01R21/003—Measuring reactive component
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/006—Measuring power factor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The present invention relates to a kind of public lighting circuit load attribute data acquisition devices, and including front end signal sampling unit, data processing unit and signal output unit, the determination methods based on the load attribute data acquisition device public lighting circuit load attribute are reference voltagesHalf period square wave VF, phase current i are generated through zero-crossing comparator1Half period square wave IF is generated through zero-crossing comparator, sets reference voltageFirst square wave of half period square wave VF generate on along the moment be t0, phase current i1First square wave of half period square wave IF generate on along the moment be tn, measure tn‑t0, according to tn‑t0Numerical value be determined as inductive load, capacitive load；Resistive load and non-linear electronic load.Since the present invention can gather and export the power factor of public lighting circuit load attribute and loaded line, so that people can very easily take corresponding line build-out measure to compensate public lighting circuit, and the power factor of circuit is improved.
Description
The invention belongs to a kind of data acquisition devices, particularly a kind of public lighting circuit (road lighting) load attribute data
Harvester and determination methods.
Background technology
Public lighting circuit runtime is a kind of multivariable, what more factors such as varying load characteristic and environmental change were formed.For
The load attribute (Fig. 1) of public lighting circuit, traditional understanding load attribute have 3 classes：Resistive load (electric current and voltage in phase),
Inductive load (current phase lags behind voltage-phase) and capacitive load (current phase is ahead of voltage-phase), wattful power
Rate isWherein P is bearing power,For translocation factor (power factor)；However, alternating current transmission line has now
Many non-linear electronic loads (need to carry out rectification to alternating current and pass through the load of capacitor filtering), these non-linear electronics are born
Harmonic wave can be generated by carrying (electric current is discontinuous, and current waveform ON time is less than half period), so now for active power
Calculation formula is active power：
Wherein λ be harmonic factor, P=V*I1, I1For fundamental current,During linear load,
During without harmonic wavePower factor is exactly traditionalLoad,
When pursuing D/C voltage ripple in AC-DC conversion, current harmonics is big, and (voltage harmonic is small, current harmonics for THD variations
Greatly), theoretically THD=100% when, PF=0.707 (electric current non-displacement), electric current generates big pulse current near pi/2, leads
Time zone is to, ＜ 1/3 half period (after rectification), mean power：
Work as t0~t3 ii(t)=0, t4~t5 ii(t)=0
So that
Pulsating power is in t at this time4~t3The mean power of possible nearly several times, impact is generated to power grid total system in time.
High-power electronic load (three-phase) such as frequency converter, charging pile etc., not only harmonic wave is big, particularly in three-phase four-wire system
In, neutral line current by be three-phase line current algebraical sum,【And so-called zero curve is three-phase linear symmetrically carries (such as three phase electric machine)
When, the vector sum of line current is that zero (symmetric line carrying is sinusoidal with frequency 2/3 π of difference, continuous sinusoidal current】It damages,
It is not only damage carrying.Power grid is destroyed when serious, zero curve, which is burnt, causes fire；
In harmonic wave caused by high-power slicing, and with low power factor caused by current displacement (as golden brake tube,
DC speed regulation milling train etc., middle frequency furnace, electrochemical industry).Because being influenced by current displacement power factor (including some electricity specially
Family), capacitance compensation is blindly used, because being to sinusoidal voltage slicing by thyristor, and generates big voltage change ratio (du/dt),
As a result capacitance necessarily leads to big electric current, causes further power grid variable or even trips, capacitance explosion.
Bibliography：
1、《Light source electric appliance principle and application technology》Liu Yuequn, Wang Qiang, Liu Zhuojiong --- Chemical Industry Press 2003 years 10
The moon the 1st edition
2、《Harmonics restraint and reactive power compensation》/ Wang Zhaoan etc. writes, China Machine Press, and 1998.9
3、《The principle and design of Switching Power Supply》/ Zhang Zhansong, Cai Xuansan write, Electronic Industry Press, and 2004.9
4、SAMSUNG*POWER DEVICES 2nd Edition。1993/94
5th, Active Power Filter-APF：Structure * principles * controls/Jiang Qirong, Zhao Dongyuan, Chen Jianye write, Science Press,
2005
6th, instantaneous power theory and its application/(day) the red wooden Thai language in electric adjustment, (Brazil) Edson, (Brazil)
Mao Lisai writes；Xu Zhengyi, China Machine Press, 2009.5
The content of the invention
The purpose of the invention is to carry out targetedly effective compensation to AC network reactive power, and provide a kind of road
Lamp driver load attribute data acquisition device and determination methods.
Before technical scheme is described, make and being defined as below：
Supply voltage
Line end voltage
i1：Phase line current
To achieve these goals, the technical solution adopted in the present invention is：
A kind of public lighting circuit load attribute data acquisition device, including front end signal sampling unit, data processing unit with
And signal output unit, its main feature is that：The front end signal sampling unit input terminal respectively with supply voltageSensor exports
End, line end voltageSensor output, phase line current i1Sensor output is connected, wherein supply voltageAnd circuit
Terminal voltageSensor uses voltage sensor, phase line current i1Sensor uses current sensor；The front end signal is adopted
Sample unit output terminal connects with data processing unit data input pin, the data output end of the data processing unit and the letter
Number output unit is connected.
The signal output unit includes display unit, wireless network communication unit and ethernet communication unit.
The current sensor uses Hall sensor or current transformer.
The present invention also provides a kind of public lighting circuit load attribute judgement sides based on the load attribute data acquisition device
Method,
Reference voltageHalf period square wave VF is generated through zero-crossing comparator
Phase current i1Half period square wave IF is generated through zero-crossing comparator.
Set reference voltageFirst square wave of half period square wave VF generate on along the moment be t0, phase current i1Half period
First square wave of square wave IF generate on along the moment be tn；
If the 1st, t1-t0＞ 0, and measure t1-t0Occurrence, then be determined as its power of inductive load：Active power：P=
V·I·cos(t1-t0)；Reactive power：Q=VIsin (t1-t0), power factor is cos (t1-t0)；
If the 2nd, t2-t0＜ 0, and measure t2-t0Occurrence, then be determined as capacitive load, power：Active power：P
=VIcos (t2-t0)；Reactive power：Q=VIsin (t2-t0), power factor is cos (t2-t0)；
3rd, when IF square waves and VF square waves are completely superposed as pure resistor load, t1-t0When=0.Then it is determined as resistive load,
Power：P=VI, power factor 1；
4th, current square wave IF width is measured less than voltage square wave VF width, and IF square waves are within VF square waves, then to be non-
Linear electron loads, and electric current is discontinuous in one cycle, and the current lead-through time is less than 2 π.
Since the present invention can gather and export the power factor of public lighting circuit load attribute and loaded line, so that
Obtaining people can very easily take corresponding line build-out measure to compensate public lighting circuit, and improve the power of circuit
Factor.
Description of the drawings
Fig. 1 is load attribute schematic diagram.
Fig. 2 is schematic block circuit diagram of the present invention.
Fig. 3 is data processing principle block diagram of the present invention.
Fig. 4 is voltage zero-crossing detection circuit figure of the present invention.
Fig. 5 is current over-zero detection circuit figure of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
A kind of alternating current transmission line load attribute data acquisition device of the present invention, including front end signal sampling unit, at data
Manage unit and signal output unit, the front end signal sampling unit input terminal respectively with supply voltageSensor exports
End, line end voltageSensor output, phase line current i1Sensor output is connected, wherein supply voltageAnd circuit
Terminal voltageSensor uses voltage sample sensor, phase line current i1Sensor is mutual using Hall sampling sensor or electric current
Sensor；The front end signal sampling unit output terminal connects with data processing unit data input pin, the data processing unit
Data output end be connected with the signal output unit.The signal output unit includes display unit, and wireless network leads to
Interrogate unit and ethernet communication unit.
The present invention can realize dynamic constantly detect voltage, electric current, line load variation, accurate calculation power, power because
Number.Load generates harmonic wave and harmonic wave total amount (mean power, pulsating power) all data pass through wireless network communication unit in time
It is uploaded with ethernet communication unit.
It is describedi1Electricity, into data processing unit (MCU), is handled after A/D is converted through data processing unit
Afterwards, handling result, which shows through signal output unit and installs communication unit additional, is sent to host computer processing：
Data processing unit processing：
(Fig. 5) reference voltageThrough zero-crossing comparator generate half period square wave VF (power frequency 50Hz) 10ms on the basis of square wave,
Half period (π) is 10ms (60Hz analogizes).
Phase current i1Cycle square wave IF is generated through zero-crossing comparator.
Along the moment as t on setting that first square wave of reference voltage cycle square wave VF generate0, phase current cycle square wave IF
One square wave generate on along the moment be tn。
If the 1st, t in measurement chart 11-t0＞ 0, and measure t1-t0Occurrence, then be determined as its power of inductive load：Have
Work(power：P=VIcos (t1-t0)；Reactive power：Q=VIsin (t1-t0), power factor is cos (t1-t0)；
If the 2nd, t in measurement chart 12-t0＜ 0, and measure t2-t0Occurrence, then be determined as capacitive load, power：Have
Work(power：P=VIcos (t2-t0)；Reactive power：Q=VIsin (t2-t0), power factor is cos (t2-t0)；
3rd, when IF square waves and VF square waves are completely superposed as pure resistor load, t in measurement chart 11-t0When=0.Then it is judged to hindering
Property load, power：P=VI, power factor 1
4th, current square wave IF width is measured less than voltage square wave VF width, and IF square waves are within VF square waves, then to be non-
Linear electron loads, and electric current is discontinuous in one cycle, and the current lead-through time is less than 2 π (in during power frequency 50hz, through mutual inductor
The square wave time that sampling and integer go out is less than 10ms), generate pulsating current and pulsating power, mean power etc.；Pass through t4-t3's
Width and actual current measure fundamental wave I through A/D1With multiple harmonic I2、I3…InIt can so calculate
Harmonic wave total amount
HereinThat power factor
And calculate pulse power
Mean power
5th, cable leakage detects：
A detects circuit terminal voltageWith front voltageDifference, calculate line drop；During dynamic detection,
Comparative analysis makes electric leakage magnitude according to circuit mathematical model；
B turns off the light after power failure, and front end exports low pressure (24V) DC voltage (because having compensating electric capacity in circuit, for measurement
Accuracy can only use DC voltage), at the same detect circuit DC current and end DC voltage can counting circuit system
Leak resistance.
Open fault：End point detection voltage is zero, and short trouble input current is big and terminal voltage is zero or very little.
The content not being described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (4)
1. a kind of public lighting circuit load attribute data acquisition device, it is characterised in that：Including front end signal sampling unit, at data
Manage unit and signal output unit, the front end signal sampling unit input terminal respectively with supply voltageSensor exports
End, line end voltageSensor output, phase line current i1Sensor output is connected, wherein supply voltageAnd circuit
Terminal voltageSensor uses voltage sensor, phase line current i1Sensor uses current sensor；The front end signal is adopted
Sample unit output terminal connects with data processing unit data input pin, the data output end of the data processing unit and the letter
Number output unit is connected.
2. according to public lighting circuit load attribute data acquisition device described in claim 1, it is characterised in that：The signal output
Unit includes display unit, wireless network communication unit and ethernet communication unit.
3. according to public lighting circuit load attribute data acquisition device described in claim 1, it is characterised in that：The current sense
Device uses Hall sensor or current transformer.
4. claim 1-3 any one of them public lighting circuit load attribute data acquisition devices are utilized, public lighting circuit load
Determined property method is：
Setting：Reference voltageHalf period square wave VF is generated through zero-crossing comparator
Phase current i1Half period square wave IF is generated through zero-crossing comparator.
Set reference voltageFirst square wave of half period square wave VF generate on along the moment be t0, phase current i1Half period square wave
First square wave of IF generate on along the moment be tn
If the 1st, t1-t0>0, and measure t1-t0Occurrence, then be determined as its power of inductive load:Active power：P=V*I*
cos(t1-t0)；Reactive power：Q=V*I*sin (t1-t0), power factor are cos (t1-t0)；
If the 2nd, t2-t0<0, and measure t2-t0Occurrence, then be determined as capacitive load, power:Active power：P=V*I*
cos(t2-t0)；Reactive power：Q=V*I*sin (t2-t0), power factor is cos (t2-t0)；
3rd, when IF square waves and VF square waves are completely superposed as pure resistor load, t1-t0During equal to 0.Then it is determined as resistive load, work(
Rate:P=V*I, power factor 1
4th, current square wave IF width is measured less than voltage square wave VF width, and IF square waves are within VF square waves, in a cycle
Interior electric current is discontinuous, and the current lead-through time is less than 2 π, then is loaded for non-linear electronic；
5th, Cable fault examination：
(1) leak current fault
Detect circuit terminal voltageWith front voltageDifference, calculate line drop；
A, dynamic detection：Comparative analysis calculates electric leakage magnitude according to circuit mathematical model；
B, static detection：Turn off the light after power failure, front end export low pressure (24V) DC voltage (because having compensating electric capacity in circuit,
DC voltage can only be used for measurement accuracy), while detect circuit DC current and end DC voltage can counting circuit
The leak resistance of system；
(2) open fault：End point detection voltage is zero；
(3) short trouble：Input current is big and terminal voltage is zero or very little.
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| CN201711141293.5A CN108107263A (en) | 2017-11-14 | 2017-11-14 | A kind of public lighting circuit load attribute data acquisition device and determination methods |
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| CN201711141293.5A CN108107263A (en) | 2017-11-14 | 2017-11-14 | A kind of public lighting circuit load attribute data acquisition device and determination methods |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110716448A (en) * | 2019-10-14 | 2020-01-21 | 国网山东省电力公司莱芜供电公司 | Simulation performance test method and device for active power filter of medium-frequency electric furnace and readable storage medium |
| CN113253005A (en) * | 2020-02-07 | 2021-08-13 | 群光电能科技股份有限公司 | Load recognition system |
| CN117491848A (en) * | 2023-12-30 | 2024-02-02 | 深圳市瀚强科技股份有限公司 | Device, method, equipment and system for determining circuit attribute |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101039044A (en) * | 2007-04-17 | 2007-09-19 | 艾默生网络能源有限公司 | Electrical distribution monitoring system and monitoring method |
| CN201985533U (en) * | 2010-08-08 | 2011-09-21 | 乐清市登立电表仪器研究所 | High-speed response reactive controller |
| CN102221642A (en) * | 2010-04-16 | 2011-10-19 | 浙江容大电力设备制造有限公司 | Power factor sampling method and power factor compensation equipment |
| CN202433442U (en) * | 2012-01-12 | 2012-09-12 | 上海理工大学 | Current harmonic detection system based on improved FBD (Function Block Diagram) algorithm and DSP (Digital Signal Processor) technology |
| CN102721859A (en) * | 2012-07-09 | 2012-10-10 | 上海稳利达科技股份有限公司 | Power factor sampling controller for three-phase transmission line in electric power system and control method thereof |
| TW201305570A (en) * | 2011-07-22 | 2013-02-01 | xian-chang Ye | Power factor measurement method of alternating current loop and device |
| CN205176128U (en) * | 2015-11-28 | 2016-04-20 | 西安科技大学 | Threephase asynchronous machine load torque measures with power factor and uses data acquisition circuit |
| CN205374594U (en) * | 2015-12-30 | 2016-07-06 | 江苏昂内斯电力科技股份有限公司 | Developments reactive power collection system |
| CN105870938A (en) * | 2016-05-12 | 2016-08-17 | 孙文兵 | Dynamic reactive power collecting device |
| CN207937513U (en) * | 2017-11-14 | 2018-10-02 | 武汉市路灯管理服务中心 | A kind of public lighting circuit load attribute data acquisition device |
-
2017
- 2017-11-14 CN CN201711141293.5A patent/CN108107263A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101039044A (en) * | 2007-04-17 | 2007-09-19 | 艾默生网络能源有限公司 | Electrical distribution monitoring system and monitoring method |
| CN102221642A (en) * | 2010-04-16 | 2011-10-19 | 浙江容大电力设备制造有限公司 | Power factor sampling method and power factor compensation equipment |
| CN201985533U (en) * | 2010-08-08 | 2011-09-21 | 乐清市登立电表仪器研究所 | High-speed response reactive controller |
| TW201305570A (en) * | 2011-07-22 | 2013-02-01 | xian-chang Ye | Power factor measurement method of alternating current loop and device |
| CN202433442U (en) * | 2012-01-12 | 2012-09-12 | 上海理工大学 | Current harmonic detection system based on improved FBD (Function Block Diagram) algorithm and DSP (Digital Signal Processor) technology |
| CN102721859A (en) * | 2012-07-09 | 2012-10-10 | 上海稳利达科技股份有限公司 | Power factor sampling controller for three-phase transmission line in electric power system and control method thereof |
| CN205176128U (en) * | 2015-11-28 | 2016-04-20 | 西安科技大学 | Threephase asynchronous machine load torque measures with power factor and uses data acquisition circuit |
| CN205374594U (en) * | 2015-12-30 | 2016-07-06 | 江苏昂内斯电力科技股份有限公司 | Developments reactive power collection system |
| CN105870938A (en) * | 2016-05-12 | 2016-08-17 | 孙文兵 | Dynamic reactive power collecting device |
| CN207937513U (en) * | 2017-11-14 | 2018-10-02 | 武汉市路灯管理服务中心 | A kind of public lighting circuit load attribute data acquisition device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110716448A (en) * | 2019-10-14 | 2020-01-21 | 国网山东省电力公司莱芜供电公司 | Simulation performance test method and device for active power filter of medium-frequency electric furnace and readable storage medium |
| CN110716448B (en) * | 2019-10-14 | 2023-02-28 | 国网山东省电力公司莱芜供电公司 | Simulation performance test method and device for active power filter of medium-frequency electric furnace and readable storage medium |
| CN113253005A (en) * | 2020-02-07 | 2021-08-13 | 群光电能科技股份有限公司 | Load recognition system |
| CN113253005B (en) * | 2020-02-07 | 2024-01-12 | 群光电能科技股份有限公司 | Load identification system |
| CN117491848A (en) * | 2023-12-30 | 2024-02-02 | 深圳市瀚强科技股份有限公司 | Device, method, equipment and system for determining circuit attribute |
| CN117491848B (en) * | 2023-12-30 | 2024-03-19 | 深圳市瀚强科技股份有限公司 | Device, method, equipment and system for determining circuit attribute |
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