CN101388548A - Dead zone processing method and logic circuit for distribution network electric energy quality regulator - Google Patents
Dead zone processing method and logic circuit for distribution network electric energy quality regulator Download PDFInfo
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- CN101388548A CN101388548A CNA2008101069780A CN200810106978A CN101388548A CN 101388548 A CN101388548 A CN 101388548A CN A2008101069780 A CNA2008101069780 A CN A2008101069780A CN 200810106978 A CN200810106978 A CN 200810106978A CN 101388548 A CN101388548 A CN 101388548A
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Abstract
The invention discloses a method for handling dead zones of distribution network power quality conditioners and a logic circuit thereof, wherein the method comprises the following steps: adopting delta modulation to control signals, getting upper and lower bridge arm on-off signals, being provided with positive-negative equivalent judgment interval near a zero-crossing point of output current, judging the size and the direction of output current, outputting upper and lower bridge arm on-off signals through adopting a time-delay conducting mode after being added into dead zone in the judgment interval of output current, judging the direction of output current out of the judgment zone, normally outputting upper bridge arm on-off signals if output current is positive, locking drive signals of a lower bridge arm, or normally outputting lower bridge arm on-off signals if output current is negative, and locking drive signals of an upper bridge arm. The method considers that the output of distribution network power quality conditioners is generally non-sinusoidal quantum, which not only solves the difficult problem that zero-crossing points are difficult to be judged, but also avoids setting dead zones in most time, and the method of handling dead zones is simply achieved, and the compensation effect of devices can be effectively improved.
Description
Technical field
The present invention relates to distribution network electric energy quality regulator, especially relate to a kind of dead zone processing method and logical circuit thereof of distribution network electric energy quality regulator.
Background technology
Because being extensive use of of a large amount of high energy consumption enterprises impact load, fluctuation load and nonlinear-load in the distribution, ubiquity voltage fluctuation and flicker, voltage dip in the distribution, three-phase is asymmetric and power quality problem such as Harmonious Waves in Power Systems pollution.No matter be power supply enterprise or power consumer, all press for and improve the power supply quality of power supply, utilize the novel electric power electric technology compensation equipment---static reacance generator (DSTATCOM) and active filter (APF) arise at the historic moment.DSTATCOM is the same on main circuit topological structure with APF basically, just the function difference that realizes separately.Development along with multi-functional machine, when this two classes device all is used to carry out the dynamic improvement of distribution network electric energy quality, they had not only exported compensating fundamental wave electric current but also output harmonic wave offset current, distinguished from being difficult in essence, can be referred to as distribution network electric energy quality regulator.
Most important part just is based on the three-phase active inverter bridge of igbt (IGBT) device in the distribution network electric energy quality regulator.For preventing that straight-through fault takes place between the inverter upper and lower bridge arm, one section Dead Time must be set in its drive signal, in the period, output waveform is not subjected to the control of logical signal at this section, and this will produce certain negative influence to the output of inverter.The generation of considering dead time effect is mainly derived from a series of error square wave, thereby therefore adding a series of compensation square wave by real-time judge electric current or idle direction in output voltage is a better method eliminating dead time effect, but everything analysis is that carry out on the basis to be output as the sinusoidal fundamental wave amount.Yet for distribution network electric energy quality regulator, these class methods are calculated comparatively complicated on the one hand, also very high to the requirement of real-time on the other hand, the first-harmonic often of what is more important distribution network electric energy quality regulator output adds the non-sine amount of harmonic wave, in a primitive period, have a plurality of zero crossings, and might be near a period of time appears at zero point continuously, this will compensate real-time and the accuracy that square wave calculates thereby influence to judging accurately that by zero crossing electric current or power direction bring difficulty.Therefore, at the characteristics of distribution network electric energy quality regulator output signal, be necessary to select the suitable dead zone processing method could be in order to be effective to greatest extent.
Summary of the invention
First purpose of the present invention is to provide a kind of dead zone processing method that its compensation effect, processing method are realized simple, real-time distribution network electric energy quality regulator that can effectively improve in the dead band.
Second purpose of the present invention is to provide a kind of logical circuit that is used for the dead zone processing method of distribution network electric energy quality regulator.
First purpose of the present invention is achieved in that
A kind of dead zone processing method of distribution network electric energy quality regulator is:
(1), control signal is adopted pwm triangular wave modulation (PWM), obtain the last brachium pontis modulation signal and the following brachium pontis modulation signal of three-phase direction complementation respectively;
(2), the electric current that a positive and negative equity is set at the near zero-crossing point of output current judges intervally, and the outflow brachium pontis of establishing output current flows to brachium pontis for bearing for just;
(3), the size of output current that sampling is obtained carries out the output current interval judgement, confirms that output current is whether in the judgement interval that is provided with;
(4), judging within the interval as if output current, then to brachium pontis triggering signal and following brachium pontis triggering signal on the output three-phase behind brachium pontis modulation signal on the three-phase that is obtained and the following brachium pontis modulation signal adding Dead Time, send into drive circuit and be the switching device break-make in the may command distribution network electric energy quality regulator, thereby effectively export compensating signal, setting principle is the time-delay conduction mode;
(5), if output current judging outside the interval, then the output current direction is judged;
(6), if output current greater than zero, for just, then blocks the drive signal of brachium pontis, last brachium pontis modulation signal normally exports drive circuit to;
(7), if output current less than zero, for negative, then blocks the drive signal that goes up brachium pontis, following brachium pontis modulation signal normally exports drive circuit to.
Second purpose of the present invention is achieved in that
A kind of logical circuit that is used for the dead zone processing method of distribution network electric energy quality regulator is made up of a delay circuit, six ungated integrated circuit, two four inputs and a door integrated circuit, absolute value circuit, comparator integrated circuit and one or an integrated circuit.
Beneficial effect of the present invention is: fully take into account the characteristics that distribution network electric energy quality regulator output is generally the non-sine amount, thereby near zero-crossing point reasonable interval adding dead band being set avoids zero crossing to be difficult to a difficult problem of accurately judging, the then pulse by judging that the sense of current blocks corresponding brachium pontis had effectively avoided being provided with the dead band when output current was in outside the judgement interval of output current in the time of the overwhelming majority.Dead zone processing method proposed by the invention is realized simple, and is real-time, is very suitable for the application of distribution network electric energy quality regulator, can effectively improve its compensation effect.
Description of drawings
Fig. 1 is a flow chart of the present invention;
Fig. 2 is a logical circuitry of the present invention;
Fig. 3 is the circuit theory road of absolute value circuit.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention is described in further detail.
Referring to Fig. 1, according to the dead band handling process, at first the control signal of the distribution network electric energy quality regulator that draws with control system is a modulation signal, adopts the triangular carrier pulse duration modulation method, obtains the last brachium pontis modulation signal and the following brachium pontis modulation signal of three-phase direction complementation.The electric current that a positive and negative equity is set at the zero crossing annex judges that interval (2～2A), the output current that sampling is obtained carries out the first step and judges whether judge within interval at this to determine its size on the other hand.If the size of output current is within this interval range, then between brachium pontis modulation signal on the three-phase that is obtained and following brachium pontis modulation signal, add one section Dead Time (5～8 μ s), the rule that is provided with in dead band adopts the time-delay conduction mode, obtain brachium pontis modulation signal and following brachium pontis modulation signal on the three-phase under such situation thus, send into drive circuit and be the switching device break-make in the may command distribution network electric energy quality regulator, thereby effectively export compensating signal.When outside the judgement interval that the size of output current is setting, second step was judged the output current direction.The outflow brachium pontis of setting output current is for just, flow to brachium pontis for negative, when output current greater than zero the time, block brachium pontis drive signal down, the last brachium pontis modulation signal that triangular modulation obtains is normally sent into drive circuit to control the switching device in the distribution network electric energy quality regulator; Otherwise, when output current less than zero the time, brachium pontis drive signal in blockades, the normal input driving circuit of following brachium pontis modulation signal of triangular modulation gained is to control the switching device in the distribution network electric energy quality regulator.Like this, in the time of a primitive period most, all need not, therefore be able to the influence of dead time effect is minimized to the inverter bridge in the distribution network electric energy quality regulator is provided with the dead band.In the application, can adjust in real time with the output situation of border factually and judge interval size, strengthen the elimination effect of dead time effect with this.
Referring to Fig. 2, the logical circuit that is used for the dead zone processing method of distribution network electric energy quality regulator, by a delay circuit IC1, one six ungated integrated circuit IC2, import and a door integrated circuit (IC) 3 for two four, IC4, an absolute value circuit IC5, a comparator integrated circuit (IC) 6 and one or an integrated circuit (IC) 7 compositions, be sent to the input of delay circuit IC1-1 respectively as the modulation gained pulse of control signal, the input of six ungated integrated circuit IC2-1, four inputs and the input B1 of door integrated circuit (IC) 3-1 and the input A1 of four inputs and door integrated circuit (IC) 4-1, four inputs of output termination and the input A1 of integrated circuit (IC) 3-1 of delay circuit IC1-1, the output Y1 of four inputs and door integrated circuit (IC) 3-1 meets the input B3 of four inputs and door integrated circuit (IC) 3-3; The input of the output termination delay circuit IC1-2 of six ungated integrated circuit IC2-1, four inputs and the input B2 of door integrated circuit (IC) 3-2 and the input B2 of four inputs and door integrated circuit (IC) 4-2, four inputs of output termination and the input A2 of integrated circuit (IC) 3-2 of delay circuit IC1-2, the output Y2 of four inputs and door integrated circuit (IC) 3-2 meets the input B4 of four inputs and door integrated circuit (IC) 3-4; The output current that sampling obtains is sent to the input of absolute value circuit IC5 and the input A2 of comparator integrated circuit (IC) 6-2 respectively, the input A1 of the output termination comparator integrated circuit (IC) 6-1 of absolute value circuit IC5, the interval value that output current is judged is sent to the input B1 of comparator integrated circuit (IC) 6-1, the output C1 of comparator integrated circuit (IC) 6-1 connects input and four inputs and the input A3 of integrated circuit (IC) 4-3 of six ungated integrated circuit IC2-2 respectively, and the output of six ungated integrated circuit IC2-2 meets four inputs and the input A3 of door integrated circuit (IC) 3-3 and the input A4 of four inputs and door integrated circuit (IC) 3-4 respectively; The input end grounding of the input B2 of comparator integrated circuit (IC) 6-2, the output C2 of comparator integrated circuit (IC) 6-2 connects four inputs and the input B1 of door integrated circuit (IC) 4-1 and the input of six ungated integrated circuit IC2-3 respectively, the output Y1 of four inputs and door integrated circuit (IC) 4-1 meets the input B3 of four inputs and door integrated circuit (IC) 4-3, output termination four inputs of six ungated integrated circuit IC2-3 and the input A2 of door integrated circuit (IC) 4-2, the output Y2 of four inputs and door integrated circuit (IC) 4-2 meets the input B4 of four inputs and door integrated circuit (IC) 4-4, the output Y3 of four inputs and door integrated circuit (IC) 3-3 connects or the input A1 of door integrated circuit (IC) 7-1, the output Y4 of four inputs and door integrated circuit (IC) 3-4 connects or the input A2 of door integrated circuit (IC) 7-2, the output Y3 of four inputs and door integrated circuit (IC) 4-3 connects or the input B1 of door integrated circuit (IC) 7-1, the output Y4 of four inputs and door integrated circuit (IC) 4-4 connects or the input B1 of door integrated circuit (IC) 7-2, or the drive signal that brachium pontis is gone up in the output Y1 output of door integrated circuit (IC) 7-1 is to drive circuit, or the output Y2 of door integrated circuit (IC) 7-2 exports the drive signal of brachium pontis to drive circuit.
Absolute value circuit IC5 is by amplifier integrated circuit (IC) 8-1, IC8-2, the the 1st to the 5th resistance R 1-R5, the 1st diode D1, the 2nd diode D2 forms, one end of the 1st resistance R 1 and the 3rd resistance R 3 all connects the output current that sampling obtains, the negative input end of another termination amplifier integrated circuit (IC) 8-1 of the 1st resistance R 1, the negative input end of another termination amplifier integrated circuit (IC) 8-2 of the 3rd resistance R 3, amplifier integrated circuit (IC) 8-1, the equal ground connection of the positive input terminal of IC8-2, the negative electrode of the 1st diode D1 connects the negative input end of amplifier integrated circuit (IC) 8-1, the 1st diode D1 anode and the 2nd diode D2 negative electrode all connect the output of amplifier integrated circuit (IC) 8-1, the anode of the 2nd diode D2 and the negative input end that meets amplifier integrated circuit (IC) 8-2 after the 4th resistance R 4 is connected, the 2nd resistance R 2 is connected in parallel between the anode of the negative input end of amplifier integrated circuit (IC) 8-1 and the 2nd diode D2, and the 5th resistance R 5 is connected in parallel between the negative input end and output of amplifier integrated circuit (IC) 8-2.
Wherein, delay circuit IC1 adopts software to realize by DSP2407, the chip model of six ungated integrated circuit IC2 is 74HC04, two four inputs are 74HC08 with the chip model of door an integrated circuit (IC) 3, IC4, the chip model of comparator integrated circuit (IC) 6 is LM319, or the door integrated circuit (IC) 7 the chip model be 74HC32, the chip model of amplifier integrated circuit (IC) 8 is LM324.
Claims (3)
1, a kind of dead zone processing method of distribution network electric energy quality regulator is characterized in that: may further comprise the steps:
(1), control signal is adopted the pwm triangular wave modulation, obtain the last brachium pontis modulation signal and the following brachium pontis modulation signal of three-phase direction complementation respectively;
(2), the electric current that a positive and negative equity is set at the near zero-crossing point of output current judges intervally, and the outflow brachium pontis of establishing output current flows to brachium pontis for bearing for just;
(3), the size of output current that sampling is obtained carries out the output current interval judgement, confirms that output current is whether in the judgement interval that is provided with;
(4), judging within the interval as if output current, then to brachium pontis triggering signal and following brachium pontis triggering signal on the output three-phase behind brachium pontis modulation signal on the three-phase that is obtained and the following brachium pontis modulation signal adding Dead Time, send into drive circuit and be the switching device break-make in the may command distribution network electric energy quality regulator, thereby effectively export compensating signal, setting principle is the time-delay conduction mode;
(5), if output current judging outside the interval, then the output current direction is judged;
(6), if output current greater than zero, for just, then blocks the drive signal of brachium pontis, last brachium pontis modulation signal normally exports drive circuit to;
(7), if output current less than zero, for negative, then blocks the drive signal that goes up brachium pontis, following brachium pontis modulation signal normally exports drive circuit to.
2, the logical circuit that is used for the dead zone processing method of distribution network electric energy quality regulator as claimed in claim 1, it is characterized in that: by a delay circuit (IC1), one six ungated integrated circuit (IC2), import and a door integrated circuit (IC3 for two four, IC4), an absolute value circuit (IC5), a comparator integrated circuit (IC6) and one or an integrated circuit (IC7) composition, be sent to the input of delay circuit (IC1-1) respectively as the modulation gained pulse of control signal, the input of six ungated integrated circuits (IC2-1), four inputs and the input (B1) of door integrated circuit (IC3-1) and the input (A1) of four inputs and door integrated circuit (IC4-1), delay circuit (four inputs of output termination and the input (A1) of integrated circuit (IC3-1) of IC1-10, the output (Y1) of four inputs and door integrated circuit (IC3-1) connects the input (B3) of four inputs and door integrated circuit (IC3-3); The input of the output termination delay circuit (IC1-2) of six ungated integrated circuits (IC2-1), four inputs and the input (B2) of door integrated circuit (IC3-2) and the input (B2) of four inputs and door integrated circuit (IC4-2), four inputs of output termination and an input (A2) of integrated circuit (IC3-2) of delay circuit (IC1-2), the output (Y2) of four inputs and door integrated circuit (IC3-2) connects the input (B4) of four inputs and door integrated circuit (IC3-4); The output current that sampling obtains is sent to the input of absolute value circuit (IC5) and the input (A2) of comparator integrated circuit (IC6-2) respectively, the input (A1) of the output termination comparator integrated circuit (IC6-1) of absolute value circuit (IC5), the interval value that output current is judged is sent to the input (B1) of comparator integrated circuit (IC6-1), the output (C1) of comparator integrated circuit (IC6-1) connects input and four inputs and an input (A3) of integrated circuit (IC4-3) of six ungated integrated circuits (IC2-2) respectively, and the output of six ungated integrated circuits (IC2-2) connects four inputs and the input (A3) of door integrated circuit (IC3-3) and the input (A4) of four inputs and door integrated circuit (IC3-4) respectively; The input end grounding of the input (B2) of comparator integrated circuit (IC6-2), the output (C2) of comparator integrated circuit (IC6-2) connects four inputs and the input (B1) of door integrated circuit (IC4-1) and the input of six ungated integrated circuits (IC2-3) respectively, the output (Y1) of four inputs and door integrated circuit (IC4-1) connects the input (B3) of four inputs and door integrated circuit (IC4-3), output termination four inputs of six ungated integrated circuits (IC2-3) and the input (A2) of door integrated circuit (IC4-2), the output (Y2) of four inputs and door integrated circuit (IC4-2) connects the input (B4) of four inputs and door integrated circuit (IC4-4), four the input with the door integrated circuit (IC3-3) output (Y3) connect or the door integrated circuit (IC7-1) input (A1), four the input with the door integrated circuit (IC3-4) output (Y4) connect or the door integrated circuit (IC7-2) input (A2), four the input with the door integrated circuit (IC4-3) output (Y3) connect or the door integrated circuit (IC7-1) input (B1), four inputs connect or the door integrated circuit (input of IC7-20 (B1) with the output (Y4) of door integrated circuit (IC4-4), or the drive signal that brachium pontis is gone up in output (Y1) output of door integrated circuit (IC7-1) is to drive circuit, or the output (Y2) of door integrated circuit (IC7-2) exports the drive signal of brachium pontis to drive circuit.
3, the logical circuit that is used for the dead zone processing method of distribution network electric energy quality regulator as claimed in claim 2, it is characterized in that: absolute value circuit (IC5) is by amplifier integrated circuit (IC8-1, IC8-2), the the 1st to the 5th resistance (R1-R5), the 1st diode (D1), the 2nd diode (D2) is formed, one end of the 1st resistance (R1) and the 3rd resistance (R3) all connects the output current that sampling obtains, the negative input end of another termination amplifier integrated circuit (IC8-1) of the 1st resistance (R1), the negative input end of another termination amplifier integrated circuit (IC8-2) of the 3rd resistance (R3), amplifier integrated circuit (IC8-1, IC8-2) the equal ground connection of positive input terminal, the negative electrode of the 1st diode (D1) connects the negative input end of amplifier integrated circuit (IC8-1), the 1st diode (D1) anode and the 2nd diode (D2) negative electrode all connect the output of amplifier integrated circuit (IC8-1), the anode of the 2nd diode (D2) and the negative input end that meets amplifier integrated circuit (IC8-2) after the 4th resistance (R4) is connected, the 2nd resistance (R2) is connected in parallel between the anode of the negative input end of amplifier integrated circuit (IC8-1) and the 2nd diode (D2), and the 5th resistance (R5) is connected in parallel between the negative input end and output of amplifier integrated circuit (IC8-2).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102623963A (en) * | 2011-01-31 | 2012-08-01 | 北京昆兰新能源技术有限公司 | Method and system for protecting switch tube in bridge arm |
| CN103441750A (en) * | 2013-07-30 | 2013-12-11 | 深圳市天微电子有限公司 | High-low voltage area signal transmission system |
| CN104901528A (en) * | 2014-03-04 | 2015-09-09 | 乐星产电(无锡)有限公司 | Method and device for improving low-frequency wobble of motor |
| CN113176793A (en) * | 2021-04-13 | 2021-07-27 | 高创传动科技开发（深圳）有限公司 | Motor servo system, control method and device thereof, electronic equipment and storage medium |
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| CN103595286A (en) * | 2013-11-13 | 2014-02-19 | 上海大学 | Dead-time compensation method and circuit used for bipolar modulation inverter bridge |
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- 2008-07-04 CN CN2008101069780A patent/CN101388548B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623963A (en) * | 2011-01-31 | 2012-08-01 | 北京昆兰新能源技术有限公司 | Method and system for protecting switch tube in bridge arm |
| CN102623963B (en) * | 2011-01-31 | 2014-09-17 | 北京昆兰新能源技术有限公司 | Method and system for protecting switch tube in bridge arm |
| CN103441750A (en) * | 2013-07-30 | 2013-12-11 | 深圳市天微电子有限公司 | High-low voltage area signal transmission system |
| CN103441750B (en) * | 2013-07-30 | 2016-09-28 | 深圳市天微电子股份有限公司 | High-low voltage area signal transmission system |
| CN104901528A (en) * | 2014-03-04 | 2015-09-09 | 乐星产电(无锡)有限公司 | Method and device for improving low-frequency wobble of motor |
| CN104901528B (en) * | 2014-03-04 | 2017-12-19 | 乐星产电(无锡)有限公司 | The ameliorative way and device of motor low-frequency jitter |
| CN113176793A (en) * | 2021-04-13 | 2021-07-27 | 高创传动科技开发（深圳）有限公司 | Motor servo system, control method and device thereof, electronic equipment and storage medium |
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