CN110138001A - A kind of phase sequence identification and self-regulating method applied to micro-capacitance sensor inverter - Google Patents
A kind of phase sequence identification and self-regulating method applied to micro-capacitance sensor inverter Download PDFInfo
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- CN110138001A CN110138001A CN201810133642.7A CN201810133642A CN110138001A CN 110138001 A CN110138001 A CN 110138001A CN 201810133642 A CN201810133642 A CN 201810133642A CN 110138001 A CN110138001 A CN 110138001A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/18—Indicating phase sequence; Indicating synchronism
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- Engineering & Computer Science (AREA)
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- Inverter Devices (AREA)
Abstract
The invention discloses a kind of phase sequence identification applied to the multi-functional inverter of micro-capacitance sensor and self-regulating methods, this method mainly includes sampling module, identification module, self-adjusting module, five part of inverter module and three-phase alternating current source, this method acquires three-phase alternating current source instantaneous voltage vector by sampling module in real time, identification module calculates three-phase voltage phase sequence according to three-phase alternating current source instantaneous voltage vector, self-adjusting module corrects timing automatically and issues control signal to inverter module to realize that three-phase inversion correctly exports, the present invention provides a kind of phase sequence identification applied to the multi-functional inverter of micro-capacitance sensor and self-regulating methods, this method is simpler compared to other methods principle, it is easier to realize without complicated transformation, detection is rapid, it is reliable and stable, this method can be not only used for the detection of generating electricity by way of merging two or more grid systems of micro-capacitance sensor inverter, it can also apply To the off-network parallel operation of micro-capacitance sensor inverter.
Description
Technical field
The present invention relates to micro-capacitance sensor fields, and in particular to a kind of phase sequence identification applied to the multi-functional inverter of micro-capacitance sensor
And self-regulating method.
Background technique
Micro-capacitance sensor be it is a kind of by distributed generation resource, load, energy storage device and monitoring and protecting device organic combination together
Small-sized electric system it is grid-connected or lonely that its may be implemented by key technologies such as the operation controls and energy management of micro-capacitance sensor
Island operation, the intermittent distributed generation resource of reduction give power distribution network bring to adversely affect, and maximally utilise distributed generation resource and go out
Power improves power supply reliability and power quality.Distributed generation resource is accessed into power distribution network in the form of micro-capacitance sensor, is generally considered
One of in such a way that distributed generation resource is effective.
Micro-capacitance sensor has grid-connected and isolated operation double grading, often due to the complexity of field condition and installer
The lack of standard of operation is often easy to lead to the phase sequence connection error of power grid three-phase electricity inverse under micro-grid connection mode
Change device can not open machine and generate electricity by way of merging two or more grid systems, and cause serious economic loss；Under micro-capacitance sensor off-network mode, more inverter off-networks
When parallel operation, it is also difficult to guarantee that the output line sequence wiring of more inverters is correct, if any two inverter phase sequences
Wiring error can generate very big circulation between inverter, cause inverter to damage, even result in the serious conditions such as fire.
Current phase sequence detecting method is chiefly used in the Phase sequence detection of motor driven and photovoltaic combining inverter, does not account for
To the double grading for being directed to micro-grid connection and isolated operation.
Summary of the invention
The technical problem to be solved by the present invention is to study a kind of phase sequence knowledge applied to the multi-functional inverter of micro-capacitance sensor
Not and self-regulating method, solve generate electricity by way of merging two or more grid systems in micro-capacitance sensor with inverter caused by phase sequence wrong when off-network parallel running without
Method opens the problem of machine or equipment damage.
Aiming at the problems existing in the prior art, the present invention provides a kind of phase applied to the multi-functional inverter of micro-capacitance sensor
Sequence identification and self-regulating method.The present invention provides a kind of phase sequence identification and self-adjusting applied to the multi-functional inverter of micro-capacitance sensor
Method, this method mainly include sampling module, identification module, five part of self-adjusting module, inverter module and three-phase alternating current source, are somebody's turn to do
Method can be not only used for the detection of generating electricity by way of merging two or more grid systems of micro-capacitance sensor inverter, also can be applied to the off-network of micro-capacitance sensor inverter
Parallel operation.
Inverter module therein can using full-bridge inverting, three-phase bridge type inverse, tri-level inversion, five level inverse conversions and
A variety of inverter circuit forms such as cells cascaded multilevel inversion.
Three-phase alternating current source can be low-voltage network, or other micro-capacitance sensor inversion power generator.
It three-phase alternating current source can be using available for different connection modes such as three-phase three-wire system, three-phase four-wire system, three-phase five-wire modes.
Sampling module is acquired in real time to three-phase alternating current source instantaneous voltage vector, is taken to voltage rising edge or decline
Along the method sampled, continuous 2 or more sampled points are sampled, reduces contingency, prevents from judging by accident.
Identification module is that the phase sequence of the three-phase voltage sampled to sampling module calculates, circular include with
Under several steps:
Step 1: the voltage value that data UA, UB, UC are respectively A, B, C three-phase is obtained by sampling module.
Step 2: UA, UB, UC are compared: if being sampled to A phase, judge sampling instant whether UB > UC；If to B phase
Sampling, then judge sampling instant whether UC > UA；If being sampled to C phase, judge sampling instant whether UA > UB.
Step 3: if above-mentioned judgement is set up, illustrate that the three-phase alternating current of sampling is positive sequence；If above-mentioned judgement is invalid,
The three-phase alternating current for then illustrating sampling is inverted sequence.
Self-adjusting module corrects phase sequence automatically according to the calculated result of identification module and issues control signal to inverse
Become module, to realize that three-phase inversion correctly exports.Specific method of adjustment are as follows: if identification module judging result is positive sequence, self-regulated
Mould preparation block issues instructions to inverter module, and three-phase inversion directly exports；If identification module judging result is inverted sequence, self-adjusting module
After control switching B, C two-phase, three-phase inversion exports again.
It is compared with existing method, present method be advantageous in that:
1. the phase sequence detecting method principle that this method includes is more simple, more preferable to realize；The sending when detecting that voltage is positive sequence
Instruct direct grid-connected, when detect voltage be inverted sequence when can with adjust automatically after it is grid-connected again.
2. this method can be not only used for the detection of generating electricity by way of merging two or more grid systems of micro-capacitance sensor inverter, it is inverse also to can be applied to micro-capacitance sensor
Become many aspects such as the off-network parallel connection power generation of device.
Detailed description of the invention
Fig. 1 is the functional block diagram of the method；
Wherein, (1) is inverter module, and (2) are three-phase alternating current source, and (3) are sampling module, and (4) are identification module, and (5) are self-regulated
Mould preparation block
Fig. 2 is three-phase alternating current source positive sequence waveform diagram；
Fig. 3 is three-phase alternating current source inverted sequence waveform diagram；
Fig. 4 is that identification module detects decision flow chart；
Fig. 5 is the off-network parallel connection schematic diagram of multiple micro-capacitance sensor inverters；
Fig. 6 is three-phase full-bridge inverting circuit schematic diagram.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings, so that the present invention is more understandable, it is easier to be applied to reality
In.
The present invention provides a kind of phase sequence identification applied to the multi-functional inverter of micro-capacitance sensor and self-regulating methods, can use
In the detection of generating electricity by way of merging two or more grid systems of micro-capacitance sensor inverter, the off-network parallel connection power generation of micro-capacitance sensor inverter also can be applied to.This hair
It is bright more simple and easy compared to other recognition methods.The present invention does not need complicated algorithm and external equipment, reduces cost.This
Invention is based on three-phase alternating current rising edge or failing edge voltage is sampled, by being compared to the voltage value sampled
Judge phase sequence.
As shown in Figure 1, sampling module samples the voltage in three-phase alternating current source, and the data transmission that sampling is obtained is extremely
Identification module.
The deterministic process of identification module is as follows:
Step 1: the voltage value that data UA, UB, UC are respectively A, B, C three-phase is obtained by sampling module.
Step 2: UA, UB, UC are compared: if being sampled to A phase, judge sampling instant whether UB > UC；If to B phase
Sampling, then judge sampling instant whether UC > UA；If being sampled to C phase, judge sampling instant whether UA > UB.
Step 3: if above-mentioned judgement is set up, illustrate that the three-phase alternating current of sampling is positive sequence；If above-mentioned judgement is invalid,
The three-phase alternating current for then illustrating sampling is inverted sequence.
As shown in Figure 2 and Figure 3, by taking A phase as an example, the sampling when A phase is in failing edge: in Fig. 2, UB > UC is positive at this time
Sequence；In Fig. 3, UB < UC is at this time inverted sequence.
Similarly, when B phase, C phase are when failing edge, it can be deduced that UC > UA is positive sequence, and UA > UB is positive sequence, on the contrary then be anti-
Sequence.Thus judge the phase sequence of this three-phase alternating current.
Recognition result information is transmitted to self-adjusting module by identification module, and self-adjusting module carries out phase sequence according to this result
It corrects.As shown in fig. 6, Fig. 6 is the main circuit of three-phase inverter bridge circuit, Uc is carrier wave, three-phase modulations signal Uru, Urv, Urw
Phase successively differs 120 °, and U, V, W are that the three-phase of inverter module exports, and phase successively differs 120 °, respectively corresponds three-phase alternating current
A, B, C three-phase in source.Also by taking A phase as an example, when identification module detects as positive sequence, then self-adjusting module issues control signal,
U, V, W are controlled with current phase sequence direct grid-connected；When identification module detects as inverted sequence, then self-adjusting module controls inverter module
Switch V and W two-phase phase, so that W phase is surpassed in reverse 120 ° of V phase, then be incorporated to three-phase alternating current source.
Claims (7)
1. a kind of phase sequence identification and self-regulating method applied to the multi-functional inverter of micro-capacitance sensor, which is characterized in that Yi Zhongying
Phase sequence identification and self-regulating method, this method for the multi-functional inverter of micro-capacitance sensor mainly include inverter module (1), three-phase
Alternating current source (2), sampling module (3), identification module (4) and self-adjusting module (5), this method are adopted in real time by sampling module (3)
Collect three-phase alternating current source instantaneous voltage vector, identification module (4) calculates three-phase voltage according to three-phase alternating current source (2) instantaneous voltage vector
Phase sequence, self-adjusting module (5) automatically correct timing and issue control signal it is correctly defeated to inverter module (1) Lai Shixian three-phase inversion
Out, this method can be not only used for the detection of generating electricity by way of merging two or more grid systems of micro-capacitance sensor inverter, also can be applied to micro-capacitance sensor inverter
Off-network parallel operation.
2. a kind of phase sequence identification and self-regulated perfect square applied to the multi-functional inverter of micro-capacitance sensor according to claim 1
Method, which is characterized in that the inverter module (1) can use full-bridge inverting, three-phase bridge type inverse, tri-level inversion, five level
A variety of inversion topological forms such as inversion and cells cascaded multilevel inversion.
3. a kind of phase sequence identification and self-regulated perfect square applied to the multi-functional inverter of micro-capacitance sensor according to claim 1
Method, which is characterized in that the three-phase alternating current source (2) can be low-voltage network, or other micro-capacitance sensor inversion power generations
Device.
4. a kind of phase sequence identification and self-regulated perfect square applied to the multi-functional inverter of micro-capacitance sensor according to claim 3
Method, which is characterized in that the three-phase alternating current source (2) can be a variety of using three-phase three-wire system, three-phase four-wire system, three-phase five-wire mode etc.
The mode of connection.
5. a kind of phase sequence identification and self-regulated perfect square applied to the multi-functional inverter of micro-capacitance sensor according to claim 1
Method, which is characterized in that the sampling module (3) is acquired in real time to three-phase alternating current source instantaneous voltage vector, is taken to electricity
The method that pressure rising edge or failing edge are sampled, samples continuous 2 or more sampled points, reduces contingency, prevents
Only judge by accident.
6. a kind of phase sequence identification and self-regulated perfect square applied to the multi-functional inverter of micro-capacitance sensor according to claim 1
Method, which is characterized in that the identification module (4) is that the phase sequence of the three-phase voltage sampled to sampling module (3) calculates, tool
Body calculation method including the following steps:
Step 1: the voltage value that data UA, UB, UC are respectively A, B, C three-phase is obtained by sampling module (3)；
Step 2: UA, UB, UC are compared: if being sampled to A phase, judge sampling instant whether UB > UC；If being adopted to B phase
Sample, then judge sampling instant whether UC > UA；If being sampled to C phase, judge sampling instant whether UA > UB；
Step 3: if above-mentioned judgement is set up, illustrate that the three-phase alternating current of sampling is positive sequence；If above-mentioned judgement is invalid, say
The three-phase alternating current of bright sampling is inverted sequence.
7. a kind of phase sequence identification and self-regulated perfect square applied to the multi-functional inverter of micro-capacitance sensor according to claim 1
Method, which is characterized in that the self-adjusting module (5) carries out automatic correct simultaneously to phase sequence according to the calculated result of identification module (4)
Control signal is issued to inverter module (1), thus realize that three-phase inversion correctly exports, specific method of adjustment are as follows: if identification module
(4) judging result is positive sequence, and self-adjusting module (5) issues instructions to inverter module (1), and inverter module (1) is defeated with current phase sequence
Three-phase alternating current out；If identification module (4) judging result is inverted sequence, self-adjusting module (5) control switching inverter module (1) output
V, W two-phase phase, make W phase from fall behind 120 ° of V phase become 120 ° of advanced V phase, then issue instructions to inverter module again
(1)。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983335A (en) * | 2020-09-01 | 2020-11-24 | 山东博奥斯能源科技有限公司 | Phase sequence detection method based on orthogonal area |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5212407A (en) * | 1990-10-04 | 1993-05-18 | International Business Machines Corporation | Digital phase match discriminator for three-phase power |
| CN102193023A (en) * | 2010-01-25 | 2011-09-21 | 欧利生电气株式会社 | Synchronization detecting circuit and automatic synchronous parallelization apparatus |
| CN104267267A (en) * | 2014-09-30 | 2015-01-07 | 广州日滨科技发展有限公司 | Phase sequence recognition method and system of energy feedback grid-connected inverter |
| CN205583683U (en) * | 2016-05-12 | 2016-09-14 | 石河子开发区巨盛丰科技有限公司 | Phase sequence adjusting device , motor, motorised valve and automatic filtration ware |
-
2018
- 2018-02-09 CN CN201810133642.7A patent/CN110138001A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5212407A (en) * | 1990-10-04 | 1993-05-18 | International Business Machines Corporation | Digital phase match discriminator for three-phase power |
| CN102193023A (en) * | 2010-01-25 | 2011-09-21 | 欧利生电气株式会社 | Synchronization detecting circuit and automatic synchronous parallelization apparatus |
| CN104267267A (en) * | 2014-09-30 | 2015-01-07 | 广州日滨科技发展有限公司 | Phase sequence recognition method and system of energy feedback grid-connected inverter |
| CN205583683U (en) * | 2016-05-12 | 2016-09-14 | 石河子开发区巨盛丰科技有限公司 | Phase sequence adjusting device , motor, motorised valve and automatic filtration ware |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983335A (en) * | 2020-09-01 | 2020-11-24 | 山东博奥斯能源科技有限公司 | Phase sequence detection method based on orthogonal area |
| CN111983335B (en) * | 2020-09-01 | 2023-01-17 | 山东博奥斯能源科技有限公司 | Phase sequence detection method based on orthogonal area |
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