Chiyero chemhando yemagetsi ndeye voltage uye frequency.Voltage kusaenzana kunokanganisa zvakanyanya kunaka kwesimba.Kuwedzera, kudzikira kana kurasikirwa kwechikamu chemagetsi kuchakanganisa kushanda kwakachengeteka kwemagetsi emagetsi emagetsi uye mushandisi voltage mhando kune akasiyana madhigirii.Pane zvikonzero zvakawanda zvekusaenzana kwevoltage mune yekubhadhara system.Ichi chinyorwa chinosuma Izvo zvitanhatu zvinokonzeresa kusagadzikana kwemagetsi zvinoongororwa zvakadzama, uye zviitiko zvakasiyana zvinoongororwa nekugadziriswa.
Mazwi akakosha: compensation system voltage;unbalance;kuongorora uye kugadzirisa
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1 Kugadzirwa kwemagetsi kusaenzana
1.1 Iyo yepasi capacitance ye phase voltage unbalanced network inokonzerwa neiyo isina kufanira muripo dhigirii uye ese arc kudzvanya macoil ari mucompensation system anoumba akateedzana resonant wedunhu ane asymmetric voltage UHC semagetsi, uye iyo isina kwayakarerekera point displacement voltage ndeye:
UN=[uo/(P+jd)]·Ux
Muchidimbu: uo ndiyo dhigirii yeasymmetry yetiweki, dhigirii remubhadharo wehurongwa: d ndiyo inonyorovesa yetiweki, iyo inenge yakaenzana ne5%;U ndiyo system power supply phase voltage.Zvinogona kuoneka kubva pane iri pamusoro fomula kuti iyo diki dhigirii remuripo, inokwirisa iyo isina kwayakarerekera point voltage.Kuti uchengetedze iyo yaakarerekera point voltage kubva pakukwira zvakanyanya panguva yekushanda kwakajairika, muripo weresonance uye pedyo-resonance muripo unofanirwa kudzivirirwa panguva yekushanda, asi mumamiriro ezvinhu anoshanda Zvisinei, zvinowanzoitika: ① Dhigirii remuripo idiki zvakanyanya, nekuda kwe capacitor ikozvino uye inductance ikozvino yearc suppression coil IL = Uφ / 2πfL nekuda kwekuchinja kwekushanda kwemhepo uye kutenderera, zvose IC uye IL zvinogona kuchinja, nokudaro kuchinja dhigirii yekare yekubhadhara.Iyo sisitimu inoswedera kana kuumba resonance muripo.②Iyo magetsi emutsara inomiswa.Kana mushandisi anogadzirisa arc kudzvanya coil, netsaona anoisa pombi inoshandura munzvimbo isina kufanira, zvichikonzera pachena kusarerekera kwenzvimbo, uyezve chiitiko chechikamu chemagetsi kusaenzana.③Mugedhi remagetsi rakabhadharwa, dzimwe nguva nekuda kwekutsika mutsara, kana kudzimwa kwemagetsi nekuda kwekudzimwa kwemagetsi nekugadzirisa, kana nekuda kwetambo iri kuiswa mugidhi remagetsi rakabhadharwa zvakanyanya, pachava pedyo kana kuumba muripo weresonance, zvichikonzera. mukusatora rutivi kwakakomba.Iyo poindi inobviswa, uye iyo phase voltage unbalance inoitika.
1.2 Kusawirirana kwemagetsi kunokonzerwa nePT disconnection at the voltage monitoring point Unhu hwekusaenzana kwevoltage kunokonzerwa nePT yechipiri fuse inoputika uye primary banga switch kusabata zvakanaka kana kusiri-full-phase operation ndeiyi;chiratidzo chekudzika chinogona kuoneka (PT primary disconnection), zvichikonzera Chiratidzo chemagetsi chechikamu chakadzimwa chakanyanya kuderera kana kuti hapana chinoratidza, asi hapana chikwata chinokwira, uye chiitiko ichi chinongoitika mune imwe shanduko.
1.3 Voltage unbalance compensation inokonzerwa ne-single-phase grounding of the system Kana iyo yakajairika, iyo asymmetry iduku, iyo voltage haisi yakakura, uye kukwanisa kwenzvimbo yekusarerekera iri pedyo nekukwanisa kwepasi.Kana simbi yekugadzika ikaitika pane imwe nzvimbo pamutsetse, bhazi kana midziyo mhenyu, iri panguva yakafanana nepasi, uye kukosha kwevoltage yezvikamu zviviri zvakajairwa pasi kunokwira kuchikamu-ku-chikamu voltage, zvichikonzera kukanganisa kwakakomba kwenzvimbo dzisina kwazvakarerekera.Kupokana kwakasiyana, iwo maviri akajairwa nhanho voltages ari padyo kana akaenzana nemagetsi emutsara, uye maamplitudes akafanana.Iyo inotungamira yeyairerekera point displacement voltage iri pamutsara wakatwasuka sevoltage yepasi, uye nzira yakatarisana nayo.Ukama hwephasor hunoratidzwa mumufananidzo 2. inoratidzwa.
1.4 Kusawirirana kwemagetsi kunokonzerwa ne-single-phase disconnection of the line kunokonzera kuchinja kweasymmetric yeparameters mumambure mushure mekunge imwe-phase disconnection, iyo inoita kuti asymmetry iwedzere zvakanyanya, zvichiita kuti magetsi awedzere pane imwe nzvimbo isina kusimba. magetsi grid, zvichikonzera chikamu chetatu-chikamu chegadziriro.Unbalanced ground voltage.Mushure mekubviswa kwechikamu chimwe chete chegadziriro, chiitiko chekare ndechekuti voltage yechikamu chakabviswa inowedzera uye simba rezvikamu zviviri zvakajairika rinoderera.Nekudaro, nekuda kwekusiyana kwechinzvimbo chekubvisa-chikamu chekudzima, mamiriro ekushanda uye zvinopesvedzera zvinhu, kutungamira uye ukuru hwekusarerekera point displacement voltage uye chiratidziro chega chega-to-ground voltage hazvina kufanana;Kuenzana kana kuenzana, mhepo yemagetsi emagetsi kusvika pasi pechikamu chakabviswa inoderera;kana kuti voltage yechikamu chakajairwa kusvika pasi inodzikira, uye voltage yechikamu chakabviswa uye imwe yakajairika chikamu kusvika pasi inowedzera asi amplitudes haina kuenzana.
1.5 Voltage kusaenzana kunokonzerwa nekubatanidza inductive yemamwe masisitimu emuripo.Mitsetse miviri yemasisitimu maviri emuripo wekufambiswa kwemagetsi anenge ari pedyo uye zvikamu zvakadarikidzana zvakareba, kana pakavhurwa muchinjikwa padanda rimwe chete rekuchengetedza, mitsetse miviri yakabatana munhevedzano nekugona kuri pakati pemitsetse inofanana.resonant circuit.Phase-to-ground voltage kusaenzana kunoitika.
1.6 Phase voltage isina kuenzana neresonance overvoltage Zvizhinji zvisina mutsara inductive zvinhu mugiredhi remagetsi, senge matransformer, electromagnetic voltage transformers, nezvimwewo, uye capacitive zvinhu zvesisitimu zvinoumba akawanda akaomarara oscillating maseketi.Kana bhazi risina chinhu richichajwa, chikamu chimwe nechimwe chemagetsi emagetsi emagetsi emagetsi uye pasi capacitance yetiweki inoumba yakazvimirira oscillation circuit, iyo inogona kukonzera maviri-phase voltage kuwedzera, imwe-phase voltage kuderera kana yakatarisana nechikamu voltage kusaenzana.Iyi ferromagnetic resonance, Inongoonekwa pabhazi remagetsi chete kana ichichaja bhazi risina chinhu kuburikidza netransformer ine simba reimwe nhanho yemagetsi.Mune system ine voltage level, dambudziko iri harisipo kana yechipiri substation bhazi inobhadhariswa nemagetsi ekufambisa main line.Kuti udzivise bhazi rekuchaja risina chinhu, mutsetse wakareba unofanirwa kubhadhariswa pamwechete.
2 Kutonga uye kurapwa kweakasiyana voltage kusaenzana mukushanda kwehurongwa
Kana iyo phase voltage unbalance ikaitika mukushanda kwehurongwa, mazhinji acho anoperekedzwa nemasaini ekuisa pasi, asi iyo voltage unbalance haisi yese yakadzika, saka mutsara haufanirwe kusarudzwa neupofu, uye unofanirwa kuongororwa uye kutongwa kubva kune zvinotevera zvinhu:
2.1 Tsvaga chikonzero kubva pakusaenzana kwechikamu chemagetsi
2.1.1 Kana iyo voltage isingaenzaniswi inogumira kune imwe nzvimbo yekutarisa uye hapana mhepo inokwira chikamu, zvichiita kuti mushandisi asava nechikamu chekurasikirwa kwekupindura, iyo unit PT yedunhu inobviswa.Panguva ino, ingofunga kana kuchengetedzwa kwechikamu chevoltage kunogona kusashanda uye kukanganisa kuyerwa.Zvingave chikonzero chekusaenzana kunokonzerwa nekusagadzikana kwemutoro wekubatanidza kwedunhu guru, rinotungamirira kukuratidzira kusina kuenzana, uye kana kunokonzerwa nekukundikana kwechiratidzo chekuratidzira.
2.1.1 Kana iyo voltage unbalance ikaitika pane imwe neimwe voltage monitoring point in the system panguva imwe chete, chiratidzo chemagetsi chenzvimbo yega yega yekutarisisa inofanira kuongororwa.Iyo isina kuenzana voltage iri pachena, uye kune kuderera kwezvikamu uye kuwedzera kwezvikamu, uye zviratidzo zvega rega rega rekutarisa voltage zvakangofanana.Mamiriro ezvinhu anokonzeresa abnormal voltage anogona zvakare kuve akakosha senge kusabatana kwakashata kwebhasibar voltage transformer.Zvinogoneka zvakare kuti zvikonzero zvakawanda zvinosanganiswa pamwechete.Kana chikonzero chekusagadzikana chisingagoni kuwanikwa, chikamu chisina kujairika chinofanira kubviswa kubva pakushanda uye kupiwa kune vashandi vekugadzirisa kuti vagadzirise.Se dispatcher uye opareta, zvakakwana kuona kuti chikonzero chekusagadzikana chiri mubhasibar voltage shanduko uye maseketi anotevera, uye kudzorera system voltage kune yakajairika.Zvikonzero zvinogona kuva:
①Dhigirii rekubhadhara harina kukodzera, kana kugadzirisa uye kushanda kweiyo arc kudzvinyirira coil hakuna kunaka.
②Under-compensated system, kune nzendo dzetsaona dzemitsara dzine maparamita akaenzana.
③Kana mutoro wakadzikira, frequency uye voltage inochinja zvakanyanya.
4. Mushure mokunge tsaona isina kuenzana yakadai sekugadzirisa pasi kunoitika mune mamwe maitiro ekubhadhara, kusarerekera kwenzvimbo yekusagadzikana kwehurongwa kunokonzerwa, uye voltage unbalance inokonzerwa nedambudziko rekubhadhara inofanira kugadziriswa.Dhigirii rekubhadhara rinofanira kugadziriswa.
Nekuda kwekusaenzana kwevoltage kunokonzerwa nekudonha kwegidhi remagetsi mutsetse uri pasi-mubhadharo wekushanda, zvinodikanwa kuedza kushandura dhigirii remuripo uye kugadzirisa arc kudzvinyirira coil.Kana mutoro uri munetiweki uri pamugero, iyo voltage unbalance inoitika kana kutenderera uye voltage ichikwira, uye iyo arc yekudzvinyirira coil inogona kugadziridzwa mushure mekunge kusaenzana kwanyangarika zvakasikwa.Semunhu anotumira, iwe unofanirwa kugona hunhu uhu kuti utonge nemazvo uye nekukurumidza kubata nekusiyana kwakasiyana-siyana kunogona kuitika panguva yekushanda.Kutonga kwechinhu chimwe chete kuri nyore, uye kutonga uye kugadzirisa kweiyo voltage abnormality inokonzerwa nekomboni kukanganisa kweaviri kana anopfuura mamiriro akanyanya kuomarara.Semuenzaniso, single-phase grounding kana resonance inowanzoperekedzwa nehigh-voltage fuse kuvhuvhuta uye yakaderera-voltage fuse kuvhuvhuta.Kana iyo yakakwira-voltage fuse isina kupeperetswa zvachose, ingave chiratidzo chepasi chinotumirwa kana kwete zvinoenderana neyechipiri voltage yekumisikidza kukosha kwechiratidzo chekudzika uye dhigirii remhepo inoputika.Tichitarisa kubva pakushanda chaiko, kana voltage isingaite, dunhu rechipiri rinowanzova risina kujairika.Panguva ino, ingave iyo voltage level uye masaini epasi anotumirwa kunze, kukosha kwereferensi hakusi kukuru.Zvinonyanya kukosha kutsvaga mutemo wekuferefeta uye kubata neabnormal voltage.
2.2 Kutonga chikonzero maererano nehukuru hwechikamu chemagetsi chisina kuenzana.Semuyenzaniso, yakakomba phase voltage unbalance inoitika mune imwe neimwe substation panguva yekushanda kwehurongwa, zvichiratidza kuti pane imwe-phase grounding kana single-phase disconnection mumutsara mukuru mune network, uye yega yega voltage monitoring point inofanira kukurumidza kuongororwa.Zvinoenderana nechiratidzo chemagetsi chechikamu chimwe nechimwe, ita mutongo wakakwana.Kana iri nyore-chikamu chekugadzika, unogona kusarudza mutsara wekutsvaga zvichienderana neyakatsanangurwa mutsara wekusarudza kutevedzana.Sarudza kutanga kubva pakubuda kwechitsiko chemagetsi, ndiko kuti, mushure mekusarudza trunk yepasi maererano nemusimboti we "mudzi wekutanga, wobva wanongedza", uye wozosarudza chikamu chepasi muzvikamu.
2.3 Tichitarisa zvikonzero zvinoenderana neshanduko yekushanda kwechishandiso chemidziyo ① Kusajairika kunoitika mune imwe nhanho yenhatu-nhanho mhepo yekushandura, uye asymmetric magetsi emagetsi anounzwa.② Mutsara wekutumira wakareba, chikamu chemuchinjiro wekondukita haina kuenzana, uye iyo impedance uye kudonha kwevoltage zvakasiyana, zvichikonzera kusagadzikana kwemagetsi kwechikamu chimwe nechimwe.③ Simba uye mwenje zvinosanganiswa uye zvinogovaniswa, uye kune akawanda-chikamu mitoro, senge midziyo yemumba, mavira emagetsi, michina yemagetsi, nezvimwe zvakanyanyonangana pachikamu chimwe kana zviviri, zvichikonzera kugovaniswa kwesimba remagetsi pane chimwe nechimwe. chikamu, ichiita kuti magetsi ekupa magetsi uye zvazvino zvisaenderane.balance.
Kupfupisa, mukushanda kwediki ikozvino grounding system (compensation system) yakavakirwa nearc kudzvanya coil, iyo phase voltage unbalance phenomenon inoitika nguva nenguva, uye nekuda kwezvikonzero zvakasiyana, dhigirii uye hunhu hwekusaenzana zvakare. zvakasiyana.Asi mamiriro akajairwa ndeekuti gidhi remagetsi riri kushanda munzvimbo isina kujairika, uye kuwedzera, kudzikira kana kurasikirwa kwechikamu chevoltage kuchakanganisa kushanda kwakachengeteka kwemagetsi grid zvishandiso uye kugadzirwa kwemushandisi kune akasiyana madhigirii.
Nguva yekutumira: Aug-29-2022