Luận văn thạc sĩ Kỹ thuật điện: Định vị sự cố trên đường dây tải điện sử dụng phương pháp sóng chạy

CÔNG TRÌNH ĐƯỢC HOÀN THÀNH TẠI TRƯỜNG ĐẠI HỌC BÁCH KHOA –ĐHQG -HCM Cán bộ hướng dẫn khoa học : PGS.TS Nguyễn Văn Liêm Ghi rõ họ, tên, học hàm, học vị và chữ ký Cán bộ chấm nhận xét 1 : .

C+ѬѪ1* GIӞI THIӊU CHUNG

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C+ѬѪ1* TӘNG QUAN

GIӞI THIӊ8%ơ,72ẩ1ĈӎNH Vӎ SӴ CӔ

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TiӃt kiӋm thӡi gian và công sӭc: KLFyVӵFӕ QJҳQPҥFK [ҧ\UDWUrQÿѭӡQJGk\

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Cҧi thiӋQÿӝ tin cұy cung cҩSÿLӋn: ViӋc bҧo trì nhanh và hiӋu quҧ dүQÿӃn cҧi thiӋQÿӝ liên tөc cung cҩSÿLӋQFKRNKiFKKjQJ'RÿyÿLӅXQj\WăQJFѭӡng hiӋu quҧ tәng thӇ cӫDOѭӟLÿLӋn

Hӛ trӧ cho viӋc bҧo trì: Các sӵ cӕ ngҳn mҥch WUrQÿѭӡng dây truyӅn tҧLÿDSKҫn là sӵ cӕ thoáng qua, khi hӋ thӕng tӵ ÿӝQJÿyQJOҥi (F79 - Reclose) thì các sӵ cӕ này sӁ bӏ loҥi bӓ, hӋ thӕng hoàn toàn không bӏ ҧQKKѭӣng Tuy nhiên viӋc phân tích nhӳng sӵ cӕ này có thӇ JL~SFK~QJWD[iFÿӏQKÿѭӧc nhӳQJ³\ӃXÿLӇP´WUrQWәng thӇ ÿѭӡng dây truyӅn tҧLĈLӅu này sӁ hӛ trӧ cho viӋc bҧo trì ÿѭӡng dây FǊQJQKѭWUiQKQKӳng sӵ cӕ có thӇ xҧy ra lһp lҥLWURQJWѭѫQJODL

YӃu tӕ kinh tӃ: Tҩt cҧ nhӳng lӧLtFKÿmÿӅ cұp ӣ trên có thӇ ÿѭӧc xem xét ӣ khía cҥnh kinh tӃ ViӋc tiӃt kiӋm thӡi gian và công sӭc tìm kiӃPQѫL[ҧy ra sӵ cӕ OjPWăQJ ÿӝ tin cұy cung cҩSÿLӋn, góp phҫn giҧPFKLSKtYjWăQJOӧi nhuұn - ÿk\OjPӝt khái niӋm thiӃt yӃu trong thӏ WUѭӡng cҥQKWUDQK'RÿyWҫm quan trӑng cӫDÿӏnh vӏ sӵ cӕ trong hӋ thӕQJÿLӋn là hiӇn nhiên

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2.2.2 3KѭѫQJSKiSVӱGөQJPҥQJ1ѫURQ QKkQWҥR

&iFPҥQJ1ѫURQWURQJWKӡL JLDQJҫQÿk\ÿmÿѭӧFÿѭDYjRVӱGөQJFKRYLӋFÿӏQKYӏ VӵFӕ>8@YjFyêQJKƭDTXDQWUӑQJWӯNKL6REDMLFYj3DRVӱGөQJFiFPҥQJNѫURQÿӇGӵEiRWKӡLJLDQKRjQWҩWWKDRWiFFӫDRelay [9@0ҥQJ1ѫURQEҳWÿҫXÿѭӧFVӱGөQJUӝQJUmLQyLFKXQJWӯFXӕLQKӳQJQăP WiPPѭѫLYjWURQJVXӕWWKӡLJLDQQKӳQJQăPFKtQPѭѫLFӫDWKӃNӹ;;&yUҩWQKLӅXQKӳQJP{KuQKYjWKXұWWRiQPҥQJNѫURQÿm ÿѭӧFÿӅ[XҩWYjӭQJGөQJQKѭQJSKәELӃQQKҩWOjFiFPҥQJWUX\ӅQWKҷQJQKLӅXOӟSYӟL

HVTH: Võ Sዣ Danh 9 FiFNKӕL[ӱOêWUXQJWkPOjNKӕLNѫURQSHUFHSWURQPjÿҥLGLӋQÿLӇQKuQKOjPҥQJ0/3

7yPWҳWOҥLQKuQFKXQJFiFJLҧLSKiSÿmÿѭӧFQJKLrQFӭXYjSKiWWULӇQNKiFELӋW QKDXNKiOӟQYӅêWѭӣQJWKXұWWRiQP{KuQKFӫDÿӕLWѭӧQJFǊQJQKѭ YӅÿӝFKtQK[iFYjNKҧQăQJiSGөQJFӫD FiFNӃWTXҧ7URQJÿySKҧLNӇWӟLWtQKWәQJTXiWFӫDFiFJLҧLSKiSNKiWKҩSFyQJKƭDOjPӝWJLҧLSKiSWKѭӡQJ ÿѭӧF JLӟLKҥQWURQJPӝWQKyPÿӕL tѭӧQJKҽSYtGөFiFJLӟLKҥQYӅFҩSÿLӋQiSVӱGөQJYӅÿӝSKӭFWҥSFӫDPҥQJÿLӋQYӅFiFÿӕLWѭӧQJQJXӗQWҧLWURQJKӋWKӕQJYӅWtQKWX\ӃQWtQKSKLWX\ӃQEmRKzDFӫDFiFSKҫQWӱFKRQrQUҩWNKyiSGөQJÿѭӧFJLҧLSKiSFӫDKӋWKӕQJQj\VDQJKӋWKӕQJNKiFKRһFWKұPFKtWURQJFQJPӝWKӋWKӕQJQKѭQJYӟLFiFSKҫQWӱWҧLNKiFQKDX

PHÁP SÓNG LAN TRUYӄN

Mễ TҦ %ơ,72ẩ1ĈӎNH Vӎ SӴ CӔ BҴNG SểNG LAN TRUYӄN [5]

7URQJWҩWFҧQKӳQJKLӋQWѭӧQJTXiÿӝ[ҧ\UDWURQJKӋWKӕQJÿLӋQÿһFWUѭQJQKҩWOj VyQJODQWUX\ӅQEӣLWKӡLJLDQGLӉQUDQJҳQQKҩWWӯYjL0LFURJLk\ÿӃQ0ilLJLk\+LӋQ WѭӧQJVyQJQj\OLrQTXDQÿӃQVӵODQWUX\ӅQFӫDVyQJÿLӋQWӯVLQKUDEӣLSӵFӕWUrQ ÿѭӡQJGk\WUX\ӅQWҧLSKyQJÿLӋQWURQJNKtTX\ӇQKRһFNKLFKX\ӇQFKӃÿӝKRҥWÿӝQJ WUrQOѭӟL.KLFyPӝWVӵFӕQJҳQPҥFKWUrQÿѭӡQJGk\WUX\ӅQWҧLVyQJÿLӋQWӯVӁFKҥ\

WKHRÿѭӡQJGk\KѭӟQJQJѭӧFOҥLYӅÿҫXÿѭӡQJGk\

Hình 3.1: 6yQJODQWUX\ӅQWӯÿLӇPVӵFӕ

0ӝWVyQJÿLӋQWӯFyWKӇÿѭӧFFKLDWKjQKVyQJÿLӋQiSNӃWKӧSYӟLFiFKLӋQWѭӧQJ[ҧ\

UDWURQJÿLӋQWUѭӡQJYjVyQJGzQJÿLӋQNӃWKӧSYӟLWӯWUѭӡQJ 7tQKQăQJTXDQWUӑQJ QKҩWFӫDVyQJÿLӋQWӯOjVӵFKX\ӇQÿӝQJFӫDÿLӋQiSYjGzQJÿLӋQYӟLPӝWWӕFÿӝFDR GӑFWKHRÿѭӡQJGk\9LӋFVӱGөQJFiFKLӋQWѭӧQJVyQJWURQJYLӋF[iFÿӏQKYӏWUtVӵFӕ ÿzLKӓLSKҧL[HP[pWQKLӅXYҩQÿӅOêWKX\ӃWFKҷQJKҥQQKѭ

- 9ұQWӕFVyQJODQWUX\ӅQWURQJÿѭӡQJGk\

- 0{KuQKGzQJÿLӋQYӟLFiFWK{QJVӕUҧL - 6X\KDRVyQJYjELӃQGҥQJ

HVTH: Võ Sዣ Danh 11 ĈӝFKtQK[iFFӫDYLӋF[iFÿӏQKYӏWUtVӵFӕ EҵQJFiFKVӱGөQJVyQJWUX\ӅQSKөWKXӝF YjRYұQWӕFWUX\ӅQVyQJWURQJÿѭӡQJGk\9ұQWӕFQj\SKөWKXӝFYjRFiFWKDPVӕFӫD ÿѭӡQJGk\, EӏҧQKKѭӣQJEӣL VӵWKD\ÿәLFӫDQKLӋWÿӝP{LWUѭӡQJ{QKLӉPEӅPһWGk\

GүQ 9ұQWӕFWUX\ӅQVyQJFǊQJSKөWKXӝFYjRÿѭӡQJÿLFӫDVyQJÿLӋQWӯGRÿyQy ÿѭӧF[iFÿӏQKULrQJFKRWӯQJ ORҥL ÿѭӡQJGk\FKR ORҥL VӵFӕFKҥPÿҩWYjVӵFӕNK{QJ FKҥPÿҩW.KLFjLÿһWWKLӃWEӏÿӏQKYӏVӵFӕYұQWӕFWUX\ӅQsóng ÿѭӧF[iFÿӏQKWӯYLӋF WҥRUDFiFVyQJODQWUX\ӅQWUrQÿѭӡQJGk\EҵQJFiFKÿyQJ FҳWFiFWөÿLӋQKRһFPi\

FҳW ĈӏQKYӏYӏWUtEҵQJVyQJODQWUX\ӅQFKLDOjPORҥLFKtQK

- 0{KuQKÿҫX6ӱGөQJVyQJODQWUX\ӅQWҥPWKӡLGRÿLӇPVӵFӕSKiWUD

- 0{KuQKÿҫX6ӱGөQJWtQKLӋX[XQJSKiWUDWӯWKLӃWEӏVDXVӵFӕ

amp;iFWK{QJVӕWUX\ӅQVyQJ

.KL[pWÿѭӡQJGk\GjLӣFKӃÿӝWUX\ӅQVyQJVѫÿӗWK{QJVӕUҧLP{WҧTXiWUuQK tru\ӅQVóQJWUrQÿѭӡQJGk\WҧLÿLӋQ

Hình 3.2: 7K{QJVӕUҧLÿѭӡQJGk\GjL

HVTH: Võ Sዣ Danh 12 +ӋSKѭѫQJWUuQKYLSKkQELӇXGLӉQTXiWUuQKWUX\ӅQVóng WUrQÿѭӡQJGk\

7URQJÿy r 0 : ĈLӋQWUӣÿѫQYӏ FӫDPҥFKWUX\ӅQVyQJ WKHRÿѫQYӏFKLӅXGjL g 0 : ĈLӋQGүQUzÿѫQYӏ FӫDPҥFKWUX\ӅQVyQJ WKHRÿѫQYӏFKLӅXGjL

C 0 ĈLӋQGXQJ ÿӕLYӟLÿҩW WKHRÿѫQYӏFKLӅXGjL

L 0 ĈLӋQFҧP ÿѭӡQJGk\WKHRÿѫQYӏFKLӅXGjL

1ӃXÿѭӡQJGk\NK{QJWәQKDRr 0 = 0, g 0 = 0)

1JKLӋPWәQJTXiWFӫDKӋSKѭѫQJWUuQKWUrQGѭӟLGҥQJVyQJFKҥ\QKѭVDX

9ӟL OjWKjQKSKҫQVyQJWӟL OjWKjQKSKҫQVyQJSKҧQ[ҥ 7әQJWUӣVyQJ

9ӟL İ 0 : KҵQJVӕÿLӋQP{LFKkQNK{QJ İ r KҵQJVӕÿLӋQP{LFӫDP{LWUѭӡQJ (3.7)

ȝ 0 : ÿӝWӯWKҭPFKkQNK{QJ

ȝ r ÿӝWӯWKҭPP{LWUѭӡQJ

7UX\ӅQVyQJJLӳDP{LWUѭӡQJ

*LҧVӱFyVyQJWӟLXt ODQWUX\ӅQWURQJP{LWUѭӡQJFyWәQJWUӣ=1ĈӃQÿLӇP$Qy FKX\ӇQVDQJP{LWUѭӡQJFyWәQJWUӣVyQJ=2.KLVyQJWUX\ӅQVDQJP{LWUѭӡQJPӟLWKu QyVӁ[XҩWKLӋQWKjQKSKҫQVyQJNK~F[ҥXk ÿӗQJWKӡLFyWKjQKSKҫQVyQJSKҧQ[ҥXp vӅ P{LWUѭӡQJFǊ

Hình 3.3: 4XiWUuQKWUX\ӅQVyQJJLӳDP{LWUѭӡQJ PhѭѫQJWUuQKÿLӅXNLӋQELrQWҥL$

6ӵSKҧQ[ҥQKLӅXOҫQFӫDVyQJ

Hình 3.5: 6ӵSKҧQ[ҥQKLӅXOҫQFӫDVyQJ

Dӵa vào FiFSKѭѫQJSKiSÿRÿӏnh vӏ sӵ cӕ bҵng sóng lan truyӅn có thӇ chia thành 5 loҥi khác nhau: Loҥi A, B, C, D, E HoҥWÿӝng cӫa mӛi loҥLÿӅu dӵa trên viӋc phân tích VyQJÿLӋn tӯ nhұQÿѭӧc khi có sӵ cӕ diӉn ra7URQJÿyFiFORҥL$'(ÿѭӧc sӱ dөng rӝng rãi.

3KѭѫQJSKiSNLӇX$

KѭѫQJSKiSNLӇX%

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7URQJÿy: lsuco: /jNKRҧQJFiFKÿӃQÿLӇPVӵFӕP. t 2 : 7KӡLJLDQVyQJSKҧQ[ҥWӯÿLӇPVӵFӕÿӃQWUҥP$V t 17KӡLJLDQ[XQJÿLWӯWUҥP$ÿӃQÿLӇPVӵFӕV v9ұQWӕFWUX\ӅQVyQJPV.

KѭѫQJSKiSNLӇX'

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7URQJÿy: lsuco: /jNKRҧQJFiFKÿӃQÿLӇPVӵFӕP. tA: 7KӡLJLDQVyQJSKҧQ[ҥÿҫXWLrQWӯÿLӇPVӵFӕÿӃQ$V tB7KӡLJLDQVyQJSKҧQ [ҥ ÿҫXWLrQWӯVӵFӕÿӃQWUҥPB (s) v9ұQWӕFWUX\ӅQVyQJPV.

3.3.5 3KѭѫQJSKiSNLӇX(

ĈӕLYӟLSKѭѫQJSKiSQj\VyQJWUX\ӅQÿѭӧFWҥRUDEӣLFKtQKFiFPi\FҳWӣWUrQ ÿѭӡQJGk\7ѭѫQJWӵQKѭNLӇXC, sӱGөQJPi\WҥR[XQJFiFPi\FҳWO~FQj\FyWKӇ ÿѭӧF[HPQKѭOjPi\WҥR[XQJULrQJELӋW

7URQJÿy: lsuco: /jNKRҧQJFiFKÿӃQÿLӇPVӵFӕP t2: 7KӡLJLDQVyQJSKҧQ[ҥWӯÿLӇPVӵFӕÿӃQWUҥP$V t17KӡLJLDQ[XQJWҥRUDÿӃQÿLӇPVӵFӕ (s) v9ұQWӕFWUX\ӅQVyQJPV

ĈѬӠNG DÂY 500KV TRÊN MATLAB

GIҦI QUYӂ7%ơ,72ẩ1ĈӎNH Vӎ Vӎ TRÍ BҴNG SểNG TRUYӄN

7URQJOXұQYăQQj\SKѭѫQJSKiSÿROѭӡQJVyQJNLӇX$VӁÿѭӧFVӱGөQJ %LӃQÿәL Clarke NӃWKӧS:DYHOHWGEÿѭӧFGQJÿӇÿӏQKYӏYӏWUtVӵFӕ

Hình 4.1 Mô hình tính toán

4.1.1 BLӃQÿәLClarke ĈѭӡQJGk\WUX\ӅQWҧLEDSKDFyVӵWѭѫQJKӛ ÿLӋQWӯJLӳDFiFSKDGk\GүQ%ҵQJFiFKVӱGөQJFiFSKpSSKkQWtFKPRGHFiFÿLӋQiSYjGzQJÿLӋQWѭѫQJKӛÿѭӧFNKDLWULӇQWKjQKPӝWWұSFiFPRGHÿLӋQiSYjGzQJÿLӋQPӟLYjFyWKӇÿѭӧF[ӱOêWѭѫQJWӵQKѭ ÿѭӡQJGk\EDSKDÿѫQ7tQKLӋXEDSKDÿѭӧFELӃQÿәLWKjQKFiFWKjQKSKҫQSKѭѫQJWKӭFÿӝFOұSTXDPDWUұQ&ODUNH&өWKӇELӃQÿәL&ODUNe chúng ta FyWKӇ[HPWURQJ[12]

9ӟLL s ĈLӋQFҧPWӵWKkQ

L m /jÿLӋQFҧPWѭѫQJKӛ

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9ӟLS, Q OjFiFPDWUұQELӃQÿәLU p , I p JLiWUӏSKDU m , I m OjJLiWUӏSKѭѫQJWKӭFÿӝFOұS 0DWUұQS FӫD SKpSELӃQÿәLÿѭӧFFKREӣL.

3KpSELӃQÿәLClarke ELӃQÿәLWtQKLӋXEDSKDWKjQKFiFSKѭѫQJWKӭFÿӝFOұSWK{QJTXD mDWUұQFӫDSKpSELӃQÿәL

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W Đ ã ă á â ạ ¦ Ӣÿk\KӋVӕFRJLmQ vjKӋVӕFKX\ӇQGӏFKFӫD4.8ÿѭӧFWKD\WKӃEҵQJG0 mNĲ0d0 m, m YjQOjFiFVӕQJX\rQ

%LӃQÿәL:DYHOHWUӡLUҥFVӁSKkQJLҧLWtQKLӋXÿҫXYjRWKjQKFiFKӋVӕ[ҩS[Ӎ (approximationYjKӋVӕFKi WLӃWdetailEұF [14]+ӋVӕ[ҩS[ӍEұFVӁOҥLÿѭӧF[Hm OjWtQKLӋXÿҫXYjRÿѭӧF SKkQWKjQKFiFKӋVӕ[ҩS[ӍYjFKLWLӃWEұFYjFӭWKӃWLӃS WөF+ӋVӕFKLWLӃWWҥLFiFEұFÿѭӧFJӑLOjKӋVӕELӃQÿәL:DYHOHW:DYHOHW7UDQVIRUP Coefficients ± WTC)

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Hình 4.3: &ҩXWU~FFiFEѭӟFOLrQWLӃSSKkQWtFKPӝWWtQKLӋXEDQÿҫX

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HVTH: Võ Sዣ Danh 28 Hình 4.5: ӃWTXҧSKkQWtFKWtQKLӋXWXҫQKRjQWKHRKӑ:DYHOHW'DXEHFKLHVEұF

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Hình 4.7&ҩXWU~FKӋWKӕQJP{SKӓQJ

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HVTH: Võ Sዣ Danh 34 *LҧVӱFyQJҳQPҥFKSKDFKҥPÿҩWӣNKRҧQJFiFK.PWtQKWӯÿҫXÿѭӡQJ

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Vӎ TRÍ SӴ CӔ

TӘNG QUAN Vӄ RELAY SEL

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