CN107329028A - A kind of method for detecting of Yyn0 types distribution transforming winding connecting joint open circuit - Google Patents
A kind of method for detecting of Yyn0 types distribution transforming winding connecting joint open circuit Download PDFInfo
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- CN107329028A CN107329028A CN201710401901.5A CN201710401901A CN107329028A CN 107329028 A CN107329028 A CN 107329028A CN 201710401901 A CN201710401901 A CN 201710401901A CN 107329028 A CN107329028 A CN 107329028A
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- open circuit
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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
Abstract
A kind of method for detecting of Yyn0 types distribution transforming winding connecting joint open circuit, methods described analyzes Yyn0 types distribution transforming high-low pressure winding after occurring open circuit fault, distribution low-voltage side outlet voltage and phase place change situation；Distribution low-voltage side voltage amplitude and phase are measured by PMU synchronous phasor measurements part in real time, the voltage magnitude and phase of collection are stored, and is compared with voltage magnitude threshold value, the phase threshold of setting, active upload is needed to monitoring main website more than threshold value；Main website is according to the voltage magnitude of reception and the specific situation of change of phase, studied and judged according to the breaking type of logic judgment relation pair, according to information such as supply network topological diagram, breaking type, association distribution transforming running status, fuse states, using push early warning and aid decision mechanism, open circuit fault early warning and aid decision mechanism are pushed to equipment owner, so as to processing warning information and the related repairing work of development in time.
Description
Technical field
The present invention relates to a kind of method for detecting of Yyn0 types distribution transforming winding connecting joint open circuit, category distribution transformer is supervised online
Survey technology field.
Background technology
The distribution transforming of Yyn0 types is used widely in power system and user side because of economy, and the event of mesolow distribution at present
Hinder level monitoring relatively low, scheduling can only stop transport or singlephase earth fault according to SCADA system information monitoring whole piece distribution line, and
Break down and can not find in time for distribution line partial sector, part platform area.Yyn0 type distribution transforming internal high pressures winding occurs
Open circuit fault situation is compared to less, but once generation, necessarily causes that three phase electric machine stall is damaged or user has a power failure, and has a strong impact on
Product quality, or even cause human safety issues.To reduce user's loss, it is necessary to for Yyn0 type distribution transforming winding connecting joints
Occurring the related research of breaking bad operating condition development, there is provided a kind of method that can accurately identify winding open circuit fault.
The content of the invention
The purpose of the present invention is to find the winding connecting joint open circuit of Yyn0 type distribution transformings high-pressure side in order to quick, and area is distributed
Become because power supply circuit breaking or fuse fall failure that there is provided a kind of detecting of Yyn0 types distribution transforming winding connecting joint open circuit
Method, is realized to Yyn0 type distribution transforming high-low pressures winding connection general level of the health on-line monitoring.
Realize the technical scheme is that, a kind of method for detecting of Yyn0 types distribution transforming winding connecting joint open circuit is described
Method analyzes Yyn0 types distribution transforming high-low pressure winding after occurring open circuit fault, distribution low-voltage side outlet voltage and phase place change feelings
Condition；Distribution low-voltage side voltage amplitude and phase are measured by PMU synchronous phasor measurements part in real time, by the voltage magnitude of collection and
Phase is stored, and is compared with voltage magnitude threshold value, the phase threshold of setting；Active upload is needed to monitoring more than threshold value
Main website；Main website enters according to the voltage magnitude of reception and the specific situation of change of phase according to the breaking type of logic judgment relation pair
Row is studied and judged, pre- using pushing according to supply network topological diagram, breaking type, association distribution transforming running status, fuse state information
Alert and aid decision mechanism, equipment owner is pushed to by open circuit fault early warning and aid decision mechanism, so as to processing alarm in time
Information and the repairing work for carrying out correlation.
A kind of method for detecting of Yyn0 types distribution transforming winding connecting joint open circuit, step is as follows：
（1）Analyze Yyn0 type distribution transforming high-low pressure winding two ends position to occur after open circuit, its distribution low-voltage side voltage amplitude and phase
Position situation of change；
（2）Yyn0 Xing Tai area's low tension outlet phase voltage amplitudes and phase are gathered, on demand active upload gathered data；
（3）Breaking type is made a distinction according to the logic studied and judged：One is that, when threephase load is balanced, the distribution transforming of Yyn0 types is mutually high
Winding first end-side or tail end is pressed to occur open circuit, then it is mutually that zero, two-phase is reduced to original 0.866 that low-pressure side phase voltage amplitude, which will appear from one,
Times and two-phase phase difference it is advanced and delayed original 30 °；Two be high pressure winding first end-side or tail when threephase load is uneven
Open circuit occurs for end, and a phase voltage amplitude is reduced to original 50% and following, phase and differs 90 degree or so, another two-phase voltage width with former phase
Value reduction, phase difference are advanced and delayed original 30 °；Three be that open circuit occurs for low pressure winding, then low-pressure side phase voltage occurs one
It is that zero, another two-phase amplitude is normal and phase invariant；
（4）To different open circuit fault types, with reference to according to transformer station-distribution line-distribution transforming supply network topological diagram and fusing
Device falls or site inspection situation, the different early warning of push and auxiliary repair mechanism.
The voltage magnitude threshold value is set as 0~120V, and the phase threshold is set as 30 °~180 °, meets any one
Bar then needs active upload to monitoring device.
The rule that the breaking type is studied and judged is：If voltage magnitude occur significantly decline, and phase occur 30 ° with
Upper change, then push high pressure winding connection tie point and occur open circuit, breakpoint appears in amplitude and declines side on a large scale；If voltage magnitude
When appearance one is mutually normal zero, another two-phase voltage, phase invariant, then pushes low pressure winding connection contact and occur breaking alarm, electricity
Pressure amplitude value be reduced to zero for failure phase.
The push early warning and aid decision mechanism are：
Warning information classification is pushed to by equipment owner according to breaking type, equipment owner need to start corresponding failure immediately and rob
Repair mechanism, including corresponding testing equipment and goods and materials；
If breaking type, which is high pressure winding, occurs open circuit, monitoring device is needed according to transformer station-distribution line-distribution transforming power supply network
Network topological diagram, inquires about whether the circuit has other to detect that terminal occurs similar high pressure winding and occurs open circuit alarm；If inquiry
As a result "true" is returned as, then judges that open-phase fault occur in branch line or basic routing line, and result is pushed to circuit operation maintenance personnel；
If Query Result is returned as "No", then judge that platform area of platform area takes fiery branch line or open-phase fault occurs in basic routing line, together
When combine distribution transforming high-tension fuse state, push distribution transforming connector open circuit fault or high voltage phase loss fault warning information；If matching somebody with somebody
Change high-tension fuse is in normal condition and circuit does not break, then pushes distribution transforming connector open circuit fault warning information；If distribution transforming
High-tension fuse, which is in, falls state, then pushes fuse and fall fault warning information.
The beneficial effects of the invention are as follows the present invention measures distribution low-voltage side voltage amplitude and phase by PMU, by collection
Semaphore is compared, and the online breaking type fault of contact that couples to Yyn0 type distribution transformings winding can be achieved and alerts, effective to reduce
User loses caused by winding disconnection fault inside distribution transforming, improves power supply reliability and good service, meanwhile, it is abnormal with reference to platform area
Quantity effective information can further determine whether occur broken string or fuse failure.
The inventive method is applicable method for detecting and on-Line Monitor Device to the open circuit of Yyn0 type distribution transforming windings connecting joint.
Brief description of the drawings
Fig. 1 is that open circuit and voltage vector-diagram occur for Yyn0 type distribution transforming B phase high pressure windings first end-side；
Fig. 2 is that open circuit occurs for Yyn0 type distribution transforming a phase low pressure windings first end-side；
Fig. 3 is that Yyn0 type distribution transforming winding connecting joint open circuit fault types study and judge flow chart.
Embodiment
The embodiment of the present invention is as shown in Figure 3.The present embodiment is to measure distribution low-voltage side voltage amplitude by PMU
And phase, the semaphore of collection is compared, and the information such as state are intelligently fallen according to PMS2.0 systems, fuse, realize
The online breaking type fault of contact that couples to Yyn0 type distribution transformings winding is alerted.
As shown in figure 3, a kind of method for detecting of Yyn0 types distribution transforming winding connecting joint open circuit of the present embodiment includes following step
Suddenly：
（1）Analyze Yyn0 type distribution transforming high-low pressure winding two ends position to occur after open circuit, its distribution low-voltage side voltage amplitude and phase
Position situation of change.
（2）PMU synchronous phasor measuring devices are included into voltage sampling apparatus and A/D converter, voltage sampling apparatus connection
Onto distribution low-voltage A, B, C, N phase line, Yyn0 Xing Tai area's low tension outlet phase voltage amplitudes and phase are gathered, active upload is adopted on demand
Collect data.
（3）PMU synchronous phasor measurements part measures distribution low-voltage side voltage amplitude and phase in real time, and by the voltage of collection
Amplitude and phase are stored, and are compared with setting threshold values, and active upload is needed to monitoring device more than threshold values.Voltage magnitude
Threshold value setting is（0~120）30 °~180 ° of V, phase threshold values.
（4）Breaking type is made a distinction according to the logic studied and judged：
Open circuit occurs for A, high pressure winding side tie point, so that open circuit occurs for connecting joint inside B phase windings as an example（As shown in Figure 1）,
Then a wide range of decline occurs for its low-pressure side b phase voltages amplitude（About open width value 50% and following）, phase vary widely, a with
The reduction of c phase voltages amplitude, phase difference are delayed and advanced former 30 °, and open circuit conditions occur for high pressure winding head end connection tie point such as
Shown in table 1.
Open circuit occurs for B, low pressure winding, so that open circuit occurs for connecting joint inside a phase windings as an example（As shown in Figure 2）, then its
Low-pressure side a phase voltages are reduced to zero, b and c phase voltages amplitude and phase is constant.
（5）To different open circuit fault types, according to transformer station-distribution line-distribution transforming supply network topological diagram, push not
Same early warning and auxiliary repair mechanism.If breaking type, which is high pressure winding, occurs open circuit, need monitoring device according to transformer station-
Distribution line-distribution transforming supply network topological diagram, inquires about whether the circuit has other to detect that similar high pressure winding hair occurs for terminal
Raw open circuit alarm；If Query Result is returned as "true", judge that open-phase fault occur in branch line or basic routing line, and by result
It is pushed to circuit operation maintenance personnel；If Query Result is returned as "No", then judge that platform area of platform area takes fiery branch line or trunk
There is open-phase fault in circuit, and will likely fault type be all pushed to operation maintenance personnel, operation maintenance personnel is according to site inspection knot
The information such as fruit or fuse state on-line monitoring system, it is final to confirm it is that high pressure winding open circuit fault or fuse fall event
Barrier.
。
Claims (5)
1. a kind of method for detecting of Yyn0 types distribution transforming winding connecting joint open circuit, it is characterised in that methods described analyzes Yyn0 types
Distribution transforming high-low pressure winding is after occurring open circuit fault, distribution low-voltage side outlet voltage and phase place change situation；Pass through the synchronous phases of PMU
Measurement part measures distribution low-voltage side voltage amplitude and phase in real time, and the voltage magnitude and phase of collection are stored, and
It is compared with voltage magnitude threshold value, the phase threshold of setting；Active upload is needed to monitoring main website more than threshold value；Main website is according to connecing
The voltage magnitude of receipts and the specific situation of change of phase, are studied and judged according to the breaking type of logic judgment relation pair, according to power supply
Network topological diagram, breaking type, association distribution transforming running status, fuse state information, using push early warning and aid decision machine
System, equipment owner is pushed to by open circuit fault early warning and aid decision mechanism, so that processing warning information and development are related in time
Repairing work.
2. a kind of method for detecting of Yyn0 types distribution transforming winding connecting joint open circuit according to claim 1, it is characterised in that institute
The step of stating method is as follows：
（1）Analyze Yyn0 type distribution transforming high-low pressure winding two ends position to occur after open circuit, its distribution low-voltage side voltage amplitude and phase
Position situation of change；
（2）Yyn0 Xing Tai area's low tension outlet phase voltage amplitudes and phase are gathered, on demand active upload gathered data；
（3）Breaking type is made a distinction according to the logic studied and judged：One is that certain occurs for Yyn0 type distribution transformings when threephase load is balanced
Open circuit occurs for phase high pressure winding first end-side or tail end, then it is mutually that zero, two-phase is reduced to original that low-pressure side phase voltage amplitude, which will appear from one,
0.866 times and two-phase phase difference it is advanced and delayed original 30 °；Two be the high pressure winding first end-side when threephase load is uneven
Or open circuit occurs for tail end, a phase voltage amplitude is reduced to original 50% and following, phase and 90 degree or so, another two-phase electricity is differed with former phase
The reduction of pressure amplitude value, phase difference are advanced and delayed original 30 °；Three be that open circuit occurs for low pressure winding, then low-pressure side phase voltage occurs
One is that zero, another two-phase is normal and phase invariant；
（4）To different open circuit fault types, with reference to according to transformer station-distribution line-distribution transforming supply network topological diagram and fusing
Device falls or site inspection situation, the different early warning of push and auxiliary repair mechanism.
3. a kind of method for detecting of Yyn0 types distribution transforming winding connecting joint open circuit according to claim 1, it is characterised in that institute
State voltage magnitude threshold value and be set as 0~120V, the phase threshold is set as 30 °~180 °, meeting any one then needs actively
It is uploaded to monitoring device.
4. a kind of method for detecting of Yyn0 types distribution transforming winding connecting joint open circuit according to claim 1, it is characterised in that institute
Stating the rule that breaking type studied and judged is：If voltage magnitude occurs significantly to decline, and more than 30 ° changes occur for phase, then
Push high pressure winding connection tie point and occur open circuit, breakpoint appears in amplitude and declines side on a large scale；If there is a phase in voltage magnitude
When being normal zero, another two-phase voltage, phase invariant, then push low pressure winding connection contact and occur open circuit alarm, voltage magnitude drop
It is zero for failure phase.
5. a kind of method for detecting of Yyn0 types distribution transforming winding connecting joint open circuit according to claim 1, it is characterised in that institute
State push early warning and aid decision mechanism is：
Warning information classification is pushed to by equipment owner according to breaking type, equipment owner need to start corresponding failure immediately and rob
Repair mechanism, including corresponding testing equipment and goods and materials；
If breaking type, which is high pressure winding, occurs open circuit, monitoring device is needed according to transformer station-distribution line-distribution transforming power supply network
Network topological diagram, inquires about whether the circuit has other to detect that terminal occurs similar high pressure winding and occurs open circuit alarm；If inquiry
As a result "true" is returned as, then judges that open-phase fault occur in branch line or basic routing line, and result is pushed to circuit operation maintenance personnel；
If Query Result is returned as "No", then judge that platform area of platform area takes fiery branch line or open-phase fault occurs in basic routing line, together
When combine distribution transforming high-tension fuse state, push distribution transforming connector open circuit fault or high voltage phase loss fault warning information；If matching somebody with somebody
Change high-tension fuse is in normal condition and circuit does not break, then pushes distribution transforming connector open circuit fault warning information；If distribution transforming
High-tension fuse, which is in, falls state, then pushes fuse and fall fault warning information.
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| CN201710401901.5A CN107329028A (en) | 2017-06-01 | 2017-06-01 | A kind of method for detecting of Yyn0 types distribution transforming winding connecting joint open circuit |
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| CN201710401901.5A CN107329028A (en) | 2017-06-01 | 2017-06-01 | A kind of method for detecting of Yyn0 types distribution transforming winding connecting joint open circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108957220A (en) * | 2018-08-10 | 2018-12-07 | 国网江西省电力有限公司赣东北供电分公司 | A kind of transmission of fuse switch state and fail analysis device based on Internet of Things |
| CN116008682A (en) * | 2023-03-22 | 2023-04-25 | 国网江西省电力有限公司电力科学研究院 | Real-time studying and judging method and system for distribution transformer high-voltage open-phase fault position |
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Application publication date: 20171107 |