Sistema automaiticiúch cosainte líne réadachta PMU de-ardleibhéil

Is PMU díol scóipeachta líne agus córas uathoibríochta nua atá ann.

dá ngabhann ar aghaidh i bhfad leis an bpoblamh atá ann go háirithe maidir le comhartha talún.

a bunaítear ar Mheastachán Fhasaí Sioncrónaithe Líonra Díol-μPMU.

PMU (phasor measurement unit), aon ghné stiúrthach nó modúl. Tá na sonraí samplacha voltais/cuirte allagar le hamchomhar BDS/GPS a bhfuil cruinneas US leibhéal.

Feidhmeanna bunúsacha: • Phasor: meastachán, uillinn • Tréimhse (f) agus Athrú Tréimhse (△f/△t)

μPMU Diagram Bloic Architechtúr

Córas Meastachán Leathan-Area (WAMS)
• Tá meastacháin PMU in éagsúlacht sioncrónaithe le Am Domhanda Caighdeánach (UTC)
• Sioncrónú meastachán leathan-area de roinnt PMU
a chuireadh isteach in áiteanna éagsúla
• Formla matamaiticiúil den chomhartha voltais/cuirte:

Sensóir Cuirte Airgeadóil i-WCS – Cúrsa Cuirte PMU Aonchanáil

Réiteach do phroblem líonra díol a bunaítear ar PMU an líonra díol agus ar theicneolaíocht mheastachán fhasaí sioncrónaithe leathan-area.

• Tógáil cuirte ardchruthaigh agus ardtréimhse
• Sioncrónú leathan-area, induiceacht cumhacht
• Suíomhú beo, cosaint IP67
• Tacaíocht do sruth forleathan nó oibriú líonra faoi cheilt
• Cumarsáid 3G/4G/ 5G：
a. Tuairisciú rialta ar gach harmónach
b. Imní áitiúil a spreagann an t-údarás data
c. Glaoch teileafónach agus test a dhéanamh ar shonraí áirithe am

• 1μs Sioncrónaithe leathan-area
• 12.8kHz Fréamh sampla
• 60 noiméad clárú tonn agus athshocruithe
• 0.5 Cruinneas mheastacháin
• 3.5A Sruth oibre íosach don fheidhmíocht lánfheidhmiúil

Sensóir Cuirte Cábail RCMU – PMU Iolchanáil Cuirte

RCMU - Sensóir cuirte cábail faoi thalúin

• 1μs Sioncrónaithe leathan-area
• 12.8kHz Fréamh sampla
• 0.5 Cruinneas mheastacháin
• 60 noiméad Athshocruithe Sonraí
• 3 mheastachán cuirte
• Tuarascáil teileafónach/bodhar teileafónach

• Bhailiú trí phhas curte, mar an prionsabal aonchnaí, oiriúnach do ring main aonad, stáisiún scuab, stáisiún foisteach
• Sioncrónú leathan-area, induiceacht cumhacht, nó 24V/48V soláthar cumhacht DC
• Algarithm tosach áitiúil bunaithe ar chuirte:
a. Short-circuit overcurrent
b. Zero sequence overcurrent
c. Asymmetric phase current
• Clárú tonn a ghlacadh mheastachán, Tacaíocht a dhéanamh ar fhiosrú suíomh forbairt
• Tacaíocht do sruth forleathan nó oibriú líonra faoi cheilt
• 3G/4G/5G nó cumarsáid líonra

Aonad Bailithe Bus BDCU – PMU Voltás Aon/Miol

An t-eagraíocht taobh istigh agus taobh amuigh

• 220V AC/24V DC soláthar cumhacht • Snáithe gloine, bodhar, teileafónach
• IEC 60870-5- 101/104/DNP3 • Is féidir 300 sensóir cuirte a rochtain Bailiú Voltás：
• 1μs Sioncrónaithe leathan-area
• 1.0 Cruinneas mheastacháin
• 12.8kHz Fréamh sampla
• 60 noiméad Athshocruithe clárú tonn

Do chomhartha talún aonphhas le sruth talún níos mó ná 1A, is 100% an cruinneas mheastacháin agus tuairisceáin bréagacha 0
• Bailiú seicheamh zero, tosú clárú ar chomhartha talún
• Bailiú agus próiseáil an clárú tonn, agus déan comhréiteach ar an mhíchruinn i gcoitinne
• Iontráil slán go príomhstáisiún díol 
a. Úsáid mar eismianaire monitóireachta insuláide talún an stáisiúin
b. Úsáid mar eismianaire monitóireachta insuláide talún san stáisiún
c. Níl aon ionsaí ar an príomhstáisiún chun an mhíchruinn a críochnú

Príomhchuid an Córais Monitóireachta Stádas Líonra Díol Intleachtach Bunaithe ar Mheastachán PMU

Úsáid Scenáiri Líonra Díol

Úsáid Trioblóideach PMU - Meastachán Stádas Líne

Úsáid Trioblóideach PMU - Clárú Tonn Scoirthe

Tá na sonraí clárú ó gach pointe monitóireachta sa líne agus sa stáisiún le ham dhearfach ag leibhéal microsecond. Is féidir le aon ghné an t-clárú a spreagadh nuair a bhíonn na coinníollacha túsúcháin réamhsocraithe sásaithe. Soláthraíonn sé "snapshot" den líonra iomlán bunaithe ar aisghairt ama ar aon imeacht in aon áit suas chun na sonraí clárú ó gach sensor. Soláthraíonn sé sonraí domhanda do anailís cruinn ar imeachtaí agus cabhrann le athshocruithe, traseáilteacht, agus rabhadh ginearálta, agus mar sin de.

Úsáid Trioblóideach PMU - Monitóireacht Cáilíochta Cumhachta

Is féidir leis an bhfeidhmeoir ríomh agus tuairisc a dhéanamh ar na harmónacháin in am réala. Bunaithe ar na sonraí sioncrónaithe leathan-area, is féidir ríomh a dhéanamh ar rangu cáilíochta cumhachta éagsúla cosúil le díol trí phhas neamhdhiongbháil, tréimhse gréasaí agus ráta athraithe, agus is féidir a aimsiú ar an bhfoinsí polaíochta.

Úsáid Trioblóideach PMU - Cosaint ar Éagóir Chumhachta

De réir na ndata carachtarach agus form cuirte an úsáideoir ar an taobh airgid, déantar anailís agus aithne a dhéanamh ar na carachtaracha carachtaracha, agus monitóireacht ar an gcaoi ina úsáideann an úsáideoir deirfiúrach an cumhacht, is féidir a úsáid le haghaidh monitóireacht teileafónach agus diagnóis ar stádas an tacaíocht cumhachta.

Úsáid Trioblóideach PMU: Rabhadh Míchruinn, Traseáilteacht agus Athshocruithe Próisis

Rabhadh：
• 2017-10-30 12:15:39：081719, líne 115, pól 1# 64#, phas A go dtí an talún
• 2017-10-30 12:15:39：093125 , líne 117, pól 29#, phas B grounded short circuit, peak flow exceeds 1000A
• 2017-10-30 12:15:39：115468 , Líne 115, idir pól 1# agus 64#, phas A agus C short circuit, Peak current at pole 1# exceeds 5000A Field feedback and fault process inversion:
• A car collision accident occurred at pole 52# on line 115
• The inspection found a burn mark in the cable cabinet somewhere behind the pól 29# on line 117
• Speculating that phase A conductor of line 115 falls down the cross arm and causes grounding, and the electric voltage of the non-fault phase increases, which leads to the breakdown of the insulation weak point phase B behind the pól 29# of line 117, forming the short circuit of the phases A and B of different lines and generating the peak current over 1000A
• After tens of milliseconds, the phase C conductor at the pól 52# of Line 115 also falls off the cross arm, causing short circuit of Phase A and C. When the peak of short-circuit current exceeds 5000A, the relay protection at the outlet of the line is operated. After the switch trips, the system runs normally, indicating that the insulation of the original breakdown point of the pól 29# of the line 117 is restored.

Úsáid Trioblóideach PMU: Aimsiú Míchruinn Grounding Disconnection

• 2018-10-05，15:27:45:395312， First alarm, the assignment notice is received.
“Allocation notice: 10kV Section 2 Phase A is connected to the ground at 15:29”  “Allocation notice: 10kV Section 2 Phase A grounding disappear at 15:47 ”
• Patrol to confirm the break of 127-1-28# of Line 121 branch
• Timely discovery of broken wire contact, to avoid passers-by close to the electric shock. It is speculated that the ground jitter of the broken insulated conductor causes multiple grounding. After the metal core is retracted into the insulation layer, the phase loss operation will result in the bus voltage returning to normal
• During this time, typhoon "Connie" passed through, so it is speculated that the disconnected line was caused by typhoon.

Úsáid Trioblóideach PMU: Big Data + AI Identification Guide to Find Fault Switches

It is Small resistance grounding system, PMU sensor configuration.

whole process of fault identification and confirmation:
• 2020.11.25 - 2021.2.5, C28YC line had 5 grounding alarms, and all the alarm had the same characteristics, but the fault point could not be found during on-site inspection.
• The AI identified a match between the characteristics of the second half of the cycle and a type of waveform in the historical database, and deduced that it was a switch defect.
• On February 5, 2021, the on-site personnel had a target in mind and found the switch fault at pole 84.

Úsáid Trioblóideach PMU: Insulation Warning Line - Reason: Meteorological Disaster

Line Neutral Grounding Mode: bus 1 arc suppression coil, bus 2 ungrounded PMU Sensor Layout Details:

System warning times: 13 times
Fault evolution process: on the afternoon of August 13, 2019, there were 13 disturbances, all indicating that they occurred in the same line section. The zero-sequence voltage rises continuously from 20V at the beginning of the warning to 30V at the end. The zero-sequence current increases from 3A to 5A, and the insulation of the line deteriorates. Due to the backlog of emergency repair tasks caused by typhoon one day ago, the priority of early warning and shortage elimination work has been postponed. After 9 hours deterioration into a short circuit, protective action trip, resulting in power failure.

Úsáid Trioblóideach PMU: Insulation Warning Line - Cause: Conflict with Trees

Starting from 21 o 'clock on 2020.5.25, nearly one hundred weak disturbance events were perceived, all of which occurred in the same place.
The damping resistance of the arc suppression coil in the station is seriously heated.
The maintenance personnel patrolled the line according to the warning information.
After clearing the tree barriers and removing the defects, the insulation of about 14 points of the line was completely restored and the system returned to normal.

Úsáid Trioblóideach PMU: Line Fault Warning - Cause: Bird Damage Line Neutral

System warning times: 10
Fault evolution process: From 19:57:41 to 22:48:18 on July 7, 2018, dozens of alarms were raised in the same place.
The time between two faults is getting shorter and the frequency is getting higher, which shows the trend of developing into permanent single-phase grounding faults. At around 10:50, the maintenance personnel manually pulled the switch on the site, destroyed the bird's nest in the fault section, closed the switch to restore power transmission, the fault disappeared.

Úsáid UCMU : Equipment Failure Warning - Cause: External Force Damage the Cable

Line neutral grounding mode: neutral grounding through arc suppression coil SMS warning times: 1

Fault Evolution Process: Multiple instantaneous grounding occurred since 15:22 on April 24, 2020, and the system pushed multiple warning information. In order to avoid frequent warning of short messages caused by instantaneous disturbance, the system sets three instantaneous grounding times within 20 minutes as the condition for pushing warning short messages. This condition can be improved through the accumulation and learning of big data by setting frequency. By 17:46, it became permanently grounded and lasted for 55 minutes.

Úsáid Trioblóideach PMU: Equipment Failure Warning - Cause: Switchgear Insulation Deterioration

System Warning Times: 4
Fault Evolution Process: During the period of 2020.11.21 to 2020.11.24, there was 4 instantaneous grounding and 1 permanent grounding, and it eventually evolved into a short circuit fault. The system recorded 5 grounding faults with the same fault interval, similar waveform and obvious arc pull characteristics, which were judged to be insulation faults at the same location.