I-Medium Voltage Static Synchronous Compensator kwiMveliso yamandla elanga

Intshayelelo

Ukudibanisa amandla elanga amakhulu asetyenziswa kwigridi yombane kuzisa imingeni eyahlukileyo. Ngenxa yokuba ukuveliswa kwamandla elanga kuyenzeka ngamaxesha athile kwaye kuxhomekeke kwii-inverters, kunokukhokelela ekutshintsheni kwamandla elanga, okungekho semgangathweni. Amandlakunye nemiba yozinzo kwiPoint of Common Coupling (PCC).

Ukuze kuhlangatyezwane neekhowudi zegridi ezingqongqo, izityalo zanamhlanje zelanga zixhomekeke ngakumbi kwi I-Voltage Ephakathi (MV) Engaguqukiyo Isihlanganisi esihambelanayos (ii-STATCOM)Le posi yebhlog ihlola indlela ii-MV STATCOMs ezisebenza ngayo njengomthombo wokugqibela wamandla aphendulayo ajikelezayo ukuze kuzinziswe ukuhlanganiswa kwamandla elanga.

Umngeni: Ukutshintsha kweLanga kunye nokuThotyelwa kweGridi

Iifama zelanga ezisebenzisa umbane zihlala zikwiindawo ezikude ezinonxibelelwano "olubuthathaka" lwegridi (i-high grid impedance). Xa amafu edlula phezu kwe-solar array, i-active power (P) output iyehla ngequbuliso. Olu tshintsho ngequbuliso luphazamisa iprofayili ye-voltage kwi-PCC.

Ngaphezu koko, abaqhubi beenkqubo zothumelo (ii-TSO) banyanzelisa iikhowudi zegridi ezingqongqo ezifuna ukuba izityalo zelanga:

• Gcina indawo ethile yamandla okanye iseti yevolthi.
• Nika Ukuhamba ngeVolthi ephantsi (LVRT)kwaye Ukuhamba ngeVolthi ephezulu (i-HVRT)ngexesha leempazamo zegridi.
• Faka okanye ufunxe amandla okusabela (Q) ngaphakathi kwee-milliseconds.

Nangona ii-solar inverters zinokubonelela ngamandla athile asebenzayo, amandla azo ehla kakhulu xa zisebenza ngexesha lokukhupha amandla asebenzayo okuphezulu, kwaye zihlala zingenaso impendulo ekhawulezayo nenkulu efunekayo ngexesha lokuphazamiseka okukhulu kwegridi.

Isisombululo: Indlela i-MV STATCOM engena ngayo

I-MV STATCOM sisixhobo esisebenza nge-elektroniki esebenzisa ii-Insulated-Gate Bipolar Transistors (IGBTs) ezilungiselelwe njenge-Voltage Source Converter (VSC). Iqhagamshelwe ngaxeshanye (i-shunt) kunye nebhasi yesikhululo selanga, isebenza njengomthombo we-voltage oguquguqukayo.

1. Inkxaso yamandla asebenzayo aguqukayo

I-STATCOM isoloko ijonga i-voltage yegridi.

• Imo yoKhuthazo (V_STATCOM > V_Grid):Ukuba i-voltage yegridi yehla ngenxa ye-cloud transient okanye impazamo, i-STATCOM ifaka ngoko nangoko amandla asebenzayo ($Q$) ukuze yonyuse i-voltage.
• Imo Yokungenisa (V_STATCOM Ukuba i-voltage yegridi iyakhukhumala, i-STATCOM ifunxa amandla okusabela ukubuyisela i-voltage kwindawo yokusebenza ekhuselekileyo.

2. Ixesha Lokuphendula Lenqanaba leMillisecond

Ngokungafaniyo neebhanki ze-capacitor zendabuko ezitshintshiweyo okanye iiStatic Var Compensators (ii-SVC) ezixhomekeke kwi-thyristors ezicothayo kunye nee-reactors, i-STATCOM esekelwe kwi-IGBT iphendula ngaphakathi kwesiqingatha somjikelo (ngesiqhelo i-$

3. Ubuchule obupheleleyo kwiiVolthi eziphantsi

Amandla ombane asebenzayo ebhanki ye-capacitor yendabuko ayancipha kane ngokwehla kwe-voltage. Ngokwahlukileyo koko, i-STATCOM inokubonelela ngombane wayo ophezulu we-capacitive nokuba i-voltage yegridi yonakala kakhulu, inika inkxaso ephezulu ngexesha lee-short circuits.

Ukwahlulwa koBugcisa: Uyilo lweNkqubo

I-MV STATCOM kwisicelo selanga idla ngokudlula imfuneko ye-transformer enkulu esezantsi ngokusebenzisa i- I-Modular Multilevel Converter (MMC)okanye i-topology ye-H-bridge ecascaded. Oku kuvumela uqhagamshelo ngqo kwiibhasi ze-voltage ephakathi (umz., 13.8kV, 34.5 kV.

Isiphelo

Njengoko ukungena kwelanga kusanda, abaqhubi begridi banciphisa ifestile yokwahluka kwevolthi evumelekileyo. I-Medium Voltage STATCOM iguqukele kwinkqubo yokuncedisa ekhethiweyo yaba yintsika ebalulekileyo yoyilo lwelanga olusetyenziswa ngokukhawuleza. Ngokubonelela ngolawulo lwevolthi olukhawulezayo, oluchanekileyo, noluthembekileyo, ii-MV STATCOM ziqinisekisa ukuba amandla elanga acocekileyo ahlala eyimpahla ezinzileyo neqikelelweyo kwigridi yombane yanamhlanje.