CN103439543B - Realize the apparatus and method of current DC even-order harmonic, subharmonic, odd harmonic - Google Patents
Realize the apparatus and method of current DC even-order harmonic, subharmonic, odd harmonic Download PDFInfo
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- CN103439543B CN103439543B CN201310386860.9A CN201310386860A CN103439543B CN 103439543 B CN103439543 B CN 103439543B CN 201310386860 A CN201310386860 A CN 201310386860A CN 103439543 B CN103439543 B CN 103439543B
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Abstract
The invention discloses one and realize current DC even-order harmonic, subharmonic, the device of odd harmonic, include current source and current harmonics transducer, described current harmonics transducer includes first via electrical switch and No. second electrical switch and triggers signaling control unit, described current source sine wave output signal, one road signal passes through first via electrical switch, another road signal passes through No. second electrical switch, the end that controls of described first via electrical switch and No. second electrical switch is connected with two signal output parts triggering signaling control unit respectively, triggering signaling control unit controls two electrical switches respectively and carries out on or off on diverse location.Produce the effective of harmonic wave, meet GB GB/T17215.321 2008(12 level state type active electric energy meter) to current DC even-order harmonic, subharmonic, the requirement of odd harmonic waveform.
Description
Technical field
The present invention relates to a kind of device producing current harmonics, particularly relate to a kind of realize the direct current even-order harmonic of electric current, subharmonic, the apparatus and method of odd harmonic.
Background technology
At present, increase due to substantial amounts of non-linear electrical equipment, substantial amounts of harmonic wave is produced in electrical network, the impact of electric energy meter is increasingly subject to people's attention by harmonic wave, so national standard just proposes the current harmonics a kind of certificate test method to the error influence amount of electric energy meter in recent years, this just requires that the power supply of electric energy meter experimental provision can produce current harmonics.Requirement according to GB GB/T17215.321-2008, it is achieved direct current even-order harmonic, subharmonic, odd harmonic these three harmonic wave.
Requirement according to these three harmonic wave forms, it is achieved method can produce the waveform of these three harmonic wave from signal source, exports through power amplification, but present amplifier is not enough due to transient response, follow-up capability is not strong, causes output waveform to distort, and especially odd harmonic is more inadequate.
Summary of the invention
It is an object of the invention to provide a kind of apparatus and method realizing current DC even-order harmonic, subharmonic, odd harmonic, harmonic wave forms is good, and harmonic content is accurate, easy to use.
The present invention uses following technical proposals: one realizes current DC even-order harmonic, subharmonic, the device of odd harmonic, include current source and current harmonics transducer, described current harmonics transducer includes first via electrical switch and No. second electrical switch and triggers signaling control unit, described current source sine wave output signal, one road signal passes through first via electrical switch, another road signal passes through No. second electrical switch, the end that controls of described first via electrical switch and No. second electrical switch is connected with two signal output parts triggering signaling control unit respectively, what the two ends of described first via electrical switch exported is direct current even-order harmonic, subharmonic or odd harmonic.
The two ends of described No. second electrical switch connect balancing resistance.
A kind of method realizing current DC even-order harmonic, subharmonic, odd harmonic, it it is the sinusoidal input current harmonic converter that current source is exported, triggering signaling control unit in current harmonics transducer controls two-way electrical switch cyclic switching, two triggering signals that wherein triggering signaling control unit is sent are Tong Bu with current source sinusoidal signal, control two electrical switches respectively and carry out on or off on diverse location, then what the two ends of first via electrical switch exported is direct current even-order harmonic, subharmonic or odd harmonic.
The present invention is the generation by the sine wave two-way electrical switch switching of conventional current source output realizes direct current even-order harmonic, subharmonic, odd harmonic, ratio power amplifier amplify direct current even-order harmonic, subharmonic, odd harmonic effective, especially odd harmonic, will at current maxima (90 °) moment become maximum value from zero, meet GB GB/T17215.321-2008(12 level state type active electric energy meter) to current DC even-order harmonic, subharmonic, the requirement of odd harmonic waveform.And amplifying such transient signal with power amplifier, it is desirable to power amplifier has preferable follow-up capability to be unpractical, and shake can occur in this position in waveform.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of current harmonics transducer；
Fig. 2 is to produce subharmonic, the test connection figure of odd harmonic；
Fig. 3 is the test connection figure producing direct current even-order harmonic；
Fig. 4 is the oscillogram of direct current even-order harmonic；
Fig. 5 is the oscillogram of subharmonic；
Fig. 6 is the oscillogram of odd harmonic.
Detailed description of the invention
nullAs shown in Figure 1，The invention discloses a kind of direct current even-order harmonic realizing electric current、Subharmonic、The device of odd harmonic，Include current source and current harmonics transducer，Described current harmonics transducer includes that first via electrical switch K1(MOS manages) and No. second electrical switch K2(MOS pipe) and the triggering signaling control unit of control two-way electrical switch break-make，Current source sine wave output signal，One road signal passes through first via electrical switch K1，Another road signal passes through No. second electrical switch K2，The end that controls of described first via electrical switch K1 and No. second electrical switch K2 is connected with two signal output parts triggering signaling control unit respectively，The triggering signal that triggering signaling control unit is sent is Tong Bu with current source sinusoidal signal，Control two electrical switches (different wave amplitude) on different time position respectively and carry out on or off，What the two ends of described first via electrical switch K1 exported is direct current even-order harmonic、Subharmonic or odd harmonic signal.The two ends of described No. second electrical switch connect balancing resistance R1, R2, and one end of first via electrical switch connects balancing resistance R3.
The principle that the present invention realizes direct current even-order harmonic, subharmonic and odd harmonic with two electrical switch cyclic switchings is: the sine wave to conventional current source output, it is triggered the triggering signal that signaling control unit sent to go to control two-way electrical switch on diverse location, carry out turn-on and turn-off, it is the formation of direct current even-order harmonic, subharmonic, odd harmonic, bypasses the current segment do not used.Described triggering signaling control unit uses frequency dividing or frequency multiplication to realize producing harmonic wave and triggers signal, it would however also be possible to employ other way realizes producing harmonic wave and triggers signal, such as programmable logic device (CPLD) etc..
Electrical switch triggers the production method of signal: this method requires that the triggering signal controlling electrical switch is Tong Bu with current source, and control point is wanted accurately.Trigger signaling control unit one zero-crossing comparator, produce the signal Tong Bu with current source, go respectively to control two electrical switches, it is achieved direct current even-order harmonic；Trigger signaling control unit to be divided for 2 times by sine-wave synchronous signal, more reversely obtain the control signal of 2 subharmonic, go respectively to control two electrical switch complementations two cycles of conducting, just realize subharmonic；The same signaling control unit that triggers is by sine-wave synchronous signal frequency multiplication, more reversely obtains the control signal of 2 odd harmonics, goes to control two electrical switch complementations respectively and turned on for 1/4 cycle, just realizes odd harmonic.
Three kinds of current harmonics to implement principle as follows:
1. direct current even-order harmonic: the sine wave of conventional current source output is switched over two-way electrical switch, No. one electrical switch aligns half cycle conducting, another lower negative half period conducting of road electrical switch docking bypasses, the positive half cycle waveform not bypassed, it is the formation of direct current even-order harmonic, as shown in Figure 4.
2. subharmonic: the sine wave of conventional current source output is switched over two-way electrical switch, No. one electrical switch is to two sinusoidal wave cycle conductings, and another road electrical switch docking conducting of lower two cycles bypasses, the waveform not bypassed, it is the formation of subharmonic, as shown in Figure 5.
3. odd harmonic: the sine wave of conventional current source output is switched over two-way electrical switch, sine wave is turned between 90 °-180 ° by No. one electrical switch, turn between 270 °-360 °, another lower waveform conducting of road electrical switch docking bypasses, the waveform not bypassed, it is the formation of odd harmonic, as shown in Figure 6.
In the certificate test device of the error influence amount that the device of above-mentioned generation harmonic wave is applied to electric energy meter, without harmonic wave and have harmonic wave experimental condition under, compare the error knots modification of electric energy meter, thus judge the harmonic wave impact on electric energy meter error.Mode of connection presses GB GB/T17215.321-2008 appendix A test connection mode, described in detail below:
As shown in Figure 2, output IA, IA0 of current source input input IA, IA0 to current harmonics transducer, harmonic wave end IA1, IA01(i.e. two ends of first via electrical switch K1 of current harmonics transducer) connection standard table, calibrated meter, subharmonic or odd harmonic signal is produced, balancing resistance end IA2, IA02(of current harmonics transducer that is two ends of No. second electrical switch K2 under the control triggering signaling control unit) connect balancing resistance (i.e. R1, R2 in Fig. 1).
As shown in Figure 3, output IA, IA0 of current source input input IA, IA0 to current harmonics transducer, harmonic wave end IA1, IA01(i.e. two ends of first via electrical switch K1 of current harmonics transducer) connect calibrated meter, direct current even harmonics signal is produced under the control triggering signaling control unit, balancing resistance end IA2, IA02(that is two ends of No. second electrical switch K2 of current harmonics transducer) connect balancing resistance (i.e. R1, R2 in Fig. 1), standard scale is connected between current source and first via electrical switch K1.
Claims (3)
1. one kind realizes current DC even-order harmonic, subharmonic, the device of odd harmonic, it is characterized in that: include current source and current harmonics transducer, described current harmonics transducer includes first via electrical switch and No. second electrical switch and triggers signaling control unit, described current source sine wave output signal, one road sine wave signal passes through first via electrical switch, another road sine wave signal passes through No. second electrical switch, the end that controls of described first via electrical switch and No. second electrical switch is connected with two signal output parts triggering signaling control unit respectively, what the two ends of described first via electrical switch exported is direct current even-order harmonic, subharmonic or odd harmonic.
The device realizing current DC even-order harmonic, subharmonic, odd harmonic the most according to claim 1, it is characterised in that: the two ends of described No. second electrical switch connect balancing resistance.
3. the method realizing current DC even-order harmonic, subharmonic, odd harmonic, it is characterized in that: the sine wave signal Harmonics of Input transducer that current source is exported, triggering signaling control unit in current harmonics transducer controls two-way electrical switch cyclic switching, two triggering signals that wherein triggering signaling control unit is sent are Tong Bu with the sine wave signal that current source exports, control two-way electrical switch respectively and carry out on or off on diverse location, then what the two ends of first via electrical switch exported is direct current even-order harmonic, subharmonic or odd harmonic.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104316896A (en) * | 2014-10-28 | 2015-01-28 | 国家电网公司 | Method for calibrating errors of electric energy meter under influence of direct currents and even-order harmonic |
| CN104698425B (en) * | 2015-03-27 | 2019-03-05 | 国家电网公司 | A kind of load automatic matching method of electric energy meter direct current even-order harmonic test |
| CN105425199B (en) * | 2015-11-27 | 2019-01-22 | 深圳市科陆驱动技术有限公司 | A kind of electric energy meter direct current even-order harmonic influences the device and method of experiment |
| CN105738705B (en) * | 2016-04-08 | 2019-03-22 | 西南交通大学 | The measurement method of tractive power supply system harmonic impedance |
| CN106501754B (en) * | 2016-10-19 | 2023-05-02 | 浙江恩鸿电子有限公司 | Test device for direct current and even harmonic influence quantity of three-phase electric energy meter |
| CN107102183B (en) * | 2017-06-20 | 2023-07-21 | 海盐新跃电器有限公司 | Circuit for controlling hardware detection waveform output and physical on-off method thereof |
| CN108051622A (en) * | 2017-10-16 | 2018-05-18 | 广东东方电讯科技有限公司 | Waveform mitotic apparatus |
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