CN106018983A - Phase failure detection single-sided comprehensive detection method - Google Patents
Phase failure detection single-sided comprehensive detection method Download PDFInfo
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- CN106018983A CN106018983A CN201610547740.6A CN201610547740A CN106018983A CN 106018983 A CN106018983 A CN 106018983A CN 201610547740 A CN201610547740 A CN 201610547740A CN 106018983 A CN106018983 A CN 106018983A
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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
- G01R29/16—Measuring asymmetry of polyphase networks
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a phase failure detection single-sided comprehensive detection method. The harmonic value of current and line voltage of a detected line is detected, and four cases are acquired through calculation. According to phase failure, if a load below a detected point is resistive or unloaded, the voltage of one phase line is lower than the detected minimum voltage, and the voltage of other two phase lines is rated voltage; if the load below the detected point is resistive and has a neutral point, the voltage of one phase line is rated, and the voltage of other two phase lines is 0.5 times the rated voltage; if the load below the detected point is inductive and has a neutral point, the voltage of one phase line is lower than a certain voltage value, and only the total harmonic distortion of the voltage of the phase is greater than a harmonic set threshold value. If the current of a phase which is determined to be failed is greater than the minimum current threshold value of current detection of the phase, the phase is not failed. According to the invention, determining is comprehensive and accurate, and electronic products can be economically designed.
Description
Technical field
The present invention relates to the improvement of the method for a kind of open phase detection one side comprehensive detection, particularly a kind of design open phase detection electronic product, it is determined that more comprehensively, more accurately, and the method realizing economically designing the open phase detection one side comprehensive detection of electronic product.
Background technology
In detection section side, sampling detection judges disconnected phase, it is simple to design electronic product open phase detection provides practical approach.If existing open phase detection be for during voltage detecting load be inductive load (three phase electric machine or transformator), capacitive load (capacitor), have neutral point load and without neutral point load various lines situation can not all judge or misinterpretation, and detection high-tension fuse break phase time can not across survey fuse two ends.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of design open phase detection electronic product, it is determined that disconnected phase more comprehensively, more accurately, and realizes economically designing electronic product；Judged that by one side measurement the method for disconnected phase can detect various loading condition, be the method for open phase detection one side comprehensive detection perceptual or capacitive or resistive, that have neutral point load and the load without neutral point can accurately detect judgement regardless of load.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is the method for a kind of open phase detection one side comprehensive detection, specifically comprise the following steps that the detection detected electric current of section circuit, line voltage, the harmonic value of line voltage, after calculating, show that four kinds of situations are as follows:
The first situation, when below tested measuring point, load is the situation of resistive load or zero load, a phases line voltage is less than the detected minimum voltage (Usmin) obtained, and other two phases line voltage are that rated voltage (Ue) then judges disconnected phase；
The second situation, when below tested measuring point, load is resistive load and the situation having neutral point, a phases line voltage is rated value (Ue), and another two phases line voltage are that 0.5 times of rated voltage then judges disconnected phase；
The third situation, below tested measuring point, load is when being inductive load and the situation having neutral point, and a phases line voltage sets threshold values (Ux) more than harmonic wave and then judges, less than certain magnitude of voltage and only total harmonic value of this phase voltage, phase of breaking；
4th kind of situation, if above judge disconnected phase occurs that this phase current has the minimum current threshold values (If) of current detecting more than this phase mutually; this phase judge not break phase.
Preferably, described harmonic wave sets threshold values (Ux) and can set detection sensitivity according to loading condition.
The invention has the beneficial effects as follows: the method for a kind of open phase detection one side of the present invention comprehensive detection, design open phase detection electronic product, it is determined that more comprehensively, more accurately, and realize economically designing electronic product；Measured by one side and judge that the method for disconnected phase can detect various loading condition, no matter load be perception or capacitive or resistive, have neutral point load and the load without neutral point can accurately detect judgement.
Accompanying drawing explanation
Accompanying drawing 1 is the schematic diagram of the method for a kind of open phase detection one side of the present invention comprehensive detection.
Detailed description of the invention
Below in conjunction with the accompanying drawings presently preferred embodiments of the present invention is described in detail, so that advantages and features of the invention can be easier to be readily appreciated by one skilled in the art, thus protection scope of the present invention is made apparent clear and definite defining.
Referring to Fig. 1, the embodiment of the present invention includes:
The method of a kind of open phase detection one side comprehensive detection, specifically comprises the following steps that the detection detected electric current of section circuit, line voltage, the harmonic value of line voltage, show that four kinds of situations are as follows after calculating:
The first situation, when below tested measuring point, load is the situation of resistive load or zero load, one phases line voltage is used for judging no-voltage situation less than the detected minimum voltage (Usmin) obtained, and other two phases line voltage are that rated voltage (Ue) then judges disconnected phase；
The second situation, when below tested measuring point, load is resistive load and the situation having neutral point, a phases line voltage is rated value (Ue), and another two phases line voltage are that 0.5 times of rated voltage then judges disconnected phase；
The third situation, when below tested measuring point, load is inductive load and the situation having neutral point, one phases line voltage less than the certain magnitude of voltage i.e. multiple of rated voltage (kUe) wherein k be the setting value according to line load substantially situation, and only this phase voltage total harmonic value more than harmonic wave set threshold values (Ux) then judges break phase；Described harmonic wave sets threshold values (Ux) can set detection sensitivity according to loading condition；
4th kind of situation, if above judge disconnected phase occurs that this phase current has the minimum current threshold values (If) of current detecting more than this phase mutually; this phase is not broken phase.
The invention has the beneficial effects as follows: the method for a kind of open phase detection one side of the present invention comprehensive detection, design open phase detection electronic product, it is determined that more comprehensively, more accurately, and realize economically designing electronic product；Measured by one side and judge that the method for disconnected phase can detect various loading condition, no matter load be perception or capacitive or resistive, have neutral point load and the load without neutral point can accurately detect judgement.
Below it is only the concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.The technical scheme that all employing equivalents or equivalence are replaced and formed, within the scope of all falling within rights protection of the present invention.
Claims (2)
1. the method for an open phase detection one side comprehensive detection, it is characterised in that: specifically comprise the following steps that the detection detected electric current of section circuit, line voltage, the harmonic value of line voltage, after calculating, show that four kinds of situations are as follows:
The first situation, when below tested measuring point, load is the situation of resistive load or zero load, a phases line voltage is less than the detected minimum voltage (Usmin) obtained, and other two phases line voltage are that rated voltage (Ue) then judges disconnected phase；
The second situation, when below tested measuring point, load is resistive load and the situation having neutral point, a phases line voltage is rated value (Ue), and another two phases line voltage are that 0.5 times of rated voltage then judges disconnected phase；
The third situation, below tested measuring point, load is when being inductive load and the situation having neutral point, and a phases line voltage sets threshold values (Ux) more than harmonic wave and then judges, less than certain magnitude of voltage and only total harmonic value of this phase voltage, phase of breaking；
4th kind of situation, if above judge disconnected phase occurs that this phase current has the minimum current threshold values (If) of current detecting more than this phase mutually; this phase is not broken phase.
The method of open phase detection one side the most according to claim 1 comprehensive detection, it is characterised in that: described harmonic wave sets threshold values (Ux) can set detection sensitivity according to loading condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610547740.6A CN106018983A (en) | 2016-07-13 | 2016-07-13 | Phase failure detection single-sided comprehensive detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610547740.6A CN106018983A (en) | 2016-07-13 | 2016-07-13 | Phase failure detection single-sided comprehensive detection method |
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| CN106018983A true CN106018983A (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610547740.6A Pending CN106018983A (en) | 2016-07-13 | 2016-07-13 | Phase failure detection single-sided comprehensive detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490686A (en) * | 2018-10-31 | 2019-03-19 | 苏州热工研究院有限公司 | Nuclear power plant's power transmission and transforming equipment open phase detection method and system |
| CN109900975A (en) * | 2019-02-27 | 2019-06-18 | 山东汇科工控技术有限公司 | A kind of frequency converter input power method for detecting open phase |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN86207198U (en) * | 1986-09-23 | 1987-05-13 | 国营第一六五厂 | Phase-current off protective device for asynchronous electric motor |
| CN201789271U (en) * | 2010-06-29 | 2011-04-06 | 河南省电力公司许昌供电公司 | Phase lack protection device of combined transformer |
| CN102419400A (en) * | 2010-09-28 | 2012-04-18 | 深圳市英威腾电气股份有限公司 | Method for detecting input phase failure of three-phase input device |
| CN103197158A (en) * | 2013-03-26 | 2013-07-10 | 深圳市英威腾电气股份有限公司 | Three-phase power grid phase loss detection method and circuit |
| CN103869202A (en) * | 2012-12-13 | 2014-06-18 | 国家电网公司 | Transformer high-tension side phase-failure detection method and system |
| CN203745550U (en) * | 2013-12-24 | 2014-07-30 | 刘培 | Three-phase power source phase loss detecting device |
| CN104777397A (en) * | 2015-04-16 | 2015-07-15 | 王金泽 | Distribution line single-phase break line judgment and positioning method based on line voltage vector criterion |
| CN105203911A (en) * | 2015-10-26 | 2015-12-30 | 常熟开关制造有限公司(原常熟开关厂） | Open conductor fault detection method and device for three-phase power source and automatic transfer switch |
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2016
- 2016-07-13 CN CN201610547740.6A patent/CN106018983A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86207198U (en) * | 1986-09-23 | 1987-05-13 | 国营第一六五厂 | Phase-current off protective device for asynchronous electric motor |
| CN201789271U (en) * | 2010-06-29 | 2011-04-06 | 河南省电力公司许昌供电公司 | Phase lack protection device of combined transformer |
| CN102419400A (en) * | 2010-09-28 | 2012-04-18 | 深圳市英威腾电气股份有限公司 | Method for detecting input phase failure of three-phase input device |
| CN103869202A (en) * | 2012-12-13 | 2014-06-18 | 国家电网公司 | Transformer high-tension side phase-failure detection method and system |
| CN103197158A (en) * | 2013-03-26 | 2013-07-10 | 深圳市英威腾电气股份有限公司 | Three-phase power grid phase loss detection method and circuit |
| CN203745550U (en) * | 2013-12-24 | 2014-07-30 | 刘培 | Three-phase power source phase loss detecting device |
| CN104777397A (en) * | 2015-04-16 | 2015-07-15 | 王金泽 | Distribution line single-phase break line judgment and positioning method based on line voltage vector criterion |
| CN105203911A (en) * | 2015-10-26 | 2015-12-30 | 常熟开关制造有限公司(原常熟开关厂） | Open conductor fault detection method and device for three-phase power source and automatic transfer switch |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490686A (en) * | 2018-10-31 | 2019-03-19 | 苏州热工研究院有限公司 | Nuclear power plant's power transmission and transforming equipment open phase detection method and system |
| CN109900975A (en) * | 2019-02-27 | 2019-06-18 | 山东汇科工控技术有限公司 | A kind of frequency converter input power method for detecting open phase |
| CN109900975B (en) * | 2019-02-27 | 2022-01-11 | 山东汇科工控技术有限公司 | Method for detecting phase loss of input power supply of frequency converter |
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Application publication date: 20161012 |