24 Months Ahead Constraint Limits
Summary
NESO publishes 24-month-ahead constraint limits in MW for the main boundaries on the GB transmission system on a weekly basis.
Why it matters
Operational planning data. The boundary constraint limits are the binding capacity for cross-boundary flows; they shape the cost of constraint payments and inform connection-queue decisions. The dataset itself is updated continuously and tracked on the NESO data portal.
Areas affected
Memo
This dataset contains constraint limits in megawatts for the main boundaries on the transmission system on weekly basis for 24 months ahead. 9 6 5 B F163 R143 A 1JU 1JS 1BL (2) 11A 10X ERROCHTY Q104 ELW 17 -1 1LE 1KT 1KU 1KE 1KF 1K0 1KN 1BP 1BR 1M7 1M8 XCS XCN CRN CRS XCW CLS CLN CF 1M3 1M4 1U9 1M1 1TD JPW JPE JFW RFW RFE 1MH 1MJ WJ1 WJ3 1M5 1M6 CW3 CW1 150 152 137 136 13A 145 F399 301 STELLA WEST to Spennymoor F396 A B 37C 1KS 1LM 1F1 1F2 1ZD 1ZC 120 1DP 149 GLENNISTON RED HOUSE 1FC 1FA (1) 1FB (2) SSE N-S 37F 37E 37D TEALING KINTORE PETERHEAD BRECHIN FIDDES BLACKHILLOCK FOYERS DOUNREAY SHIN COUPAR ANGUS ARBROATH 19M 19F 168 19G 171 121 11S Q1CN 1E9 1KZ 1KY 139 151 138 146 1JR 1JT 1G8 1G9 KEITH CRAIGIEBUCKLER TARLAND 141 142 140 1JX 1JY MILTON OF CRAIGIE PERSLEY XT2 XT1 XH1 HCD2 AH1 CU2 BC2 TD1 HKU1 NDR1 VX2 PX VP FB TBN TAN TM2 TM1 MD1 MD2 GDN TCW TCE GF LD2 BSW BSE LM1 DME 1L4 MYBSTER DUNBEATH BRORA CLAYHILLS WILLOWDALE WOODHILL GLENAGNES DUDHOPE GLENFARCLAS 1L3 BOAT OF GARTEN DALLAS 1G4 FK 1DX 144 159 172 173 TORNESS ECCLES GALASHIELS WISHAW KINCARDINE GRANGEMOUTH LONGANNET EASTERHOUSE NEWARTHILL KENDOON GLENLEE DEVOLMOOR CHARLESTON BURGHMUIR ABERNETHY ERSKINE 139 178 179 145 1EY 125 104 105 136 135 108 134 111 19E 16A 122 (1) 157 (1) 11K 149 (2) 1A2 110 1C5 (1) 1C4 (2) 144 (1) 140 (2) 1DC (1) 1DD (2) 1EG 1AF 1GF 1FT/1FU 1MT 1MS 1VH 1VG 120 14B (1) 14C (2) 1KR 1LL 1LK 1KQ 1KP 12A HAGGS RD BONNYBRIDGE CLYDES MILL EAST KILBRIDE STRATHAVEN EAST KILBRIDE SOUTH KILMARNOCK SOUTH MOSSMORRAN DEVONSIDE STIRLING 1 2 1LI 1A6 (2) A B 184 (1) 187 (1) 186 (2) 181 (2) F122 BUSBY LAMBHILL COYLTON 101 (1) 1AS (2) 124 (2) AYR 1CB (1) 182 (2) A 123 (1) B MAYBOLE AUCHENCROSH 1G3 WINDYHILL HELENS- BURGH SLOY DUNOON 131 133 132 134 1FE 1HF 1MD 1DJ 1EC 1MA 1MF 1EA 1EB 1MB STRATHLEVEN DALMALLY 1AJ CRUACHAN 106 SMEATON CURRIE KAIMES 1CF F158 F190 F141 A B WESTFIELD 1HD 1F4 1J4 1F3 1J3 GLENROTHES 130 147 1C3 COCKENZIE TW2 TW1 SY2 YZ1 CGS GDS CGN HCS HCN CCS CCN ECS ECN EG1 EG2 PCN WHE SWE1 GL1 SWE1 GL2 WS GOVAN PAISLEY WHISTLEFIELD 1CH 1AC 1AD 1CD BRAEHEAD PARK 1AH 1GD 1BG 1BH 1BF 107 148 1CE (1) 1AJ CLUNIE 1A7 (1) 114 113 15Y 114 103 104 126 140 to N. Ireland SHE2 SWW2 1CL 1W3 148 (1) 1DE 1HH 1HJ 1DH 1DF 107 1AM (1) (2) (K) 127 160 154/155 152/1A8 1E3 Q1CL Q1CM CA1 1V6 BROADFORD HADYARD HILL TONGLAND 1CJ 1EJ 10V NEILSTON 121 122 F178 123 CAS 102 101 REDMOSS 17-1 DUNVEGAN ARDMORE HARRIS STORNOWAY 1GG 1FM/1FS STRATHBRORA BFY1 14T 1MC 1ME SWW1 SWW2 1VT HARKER 262 202 to Heysham and Penwortham 205 11S 1-17 1-17 PORT ANN 1JL 1VC IK1 KS1 1VB 165 INVERARAY TAS ARDKINGLAS 1LX 1LW 1L9 1LT 1LS 17S 1LQ EKS BNN ELGIN 1 2 NAIRN DUNLAW EXTENSION 10B 112 14Z 1JK 1JE NEN BNS EKN TAN COALBURN 102 1ES 1BB (2) HAWICK CHAPELCROSS DUMFRIES 1BM 2M6 1H9 A 1BA (1) 2N2 11R GRETNA 10C 10E 1BN 1BK (1) 283 A 107 2DG 101 ELVANFOOT 1ET 105 1TZ INVERARNAN EDINBANE 11G (2) SN1 SN2 11H (1) NL1 NL2 11F (2) 11E (1) 10T 10U 15Y 12S B CRYSTAL RIG 10F F251 F252 F254 F253 N S 10 3B 1 2 BLYTH A39J A393 GRIFFIN GP1 GA2 1V8 1V1 F108 KILWINNING SALTCOATS HUNTERSTON FARM MEADOWHEAD FRO2 15B 1 2 1CX 1BZ 1NL 1DL 1DT 1CT 1CV 1DR 1DS 116 117 10W 18A FRO1 15A DNG1 14G GORDONBUSH BC1 190 (1) 14P 199 106 BERRYBURN FASNAKYLE 192 (2) FORT AUGUSTUS BEAULY 10P 11R 11H 10S 10A NG1 BG1 UH2 1DM 197 BN1 1 2 MOFFAT 399 398 39H 392 FETTERESSO 142 (1) R141 148 (2) R142 XS1 18C JFE 1M2 LNG2 KNOCKNAGAEL NKILGRMO SCOTEX SSE - SP2 FALLAGO DENNY NORTH 1-17 1-17 1D2 TUMMEL AN SUIDHE 1VM 17A 1F7 ME1 GM1 10R 11C 11E 10Y CDX2 CAIRNFORD 1DV 16C(1) 1 2 NGU1 13U CONNAGILL 1P2 13U 1V0 1P3 1N9 NGU2 147 14L BRACO WEST 10Z CROSSAIG 1GP 1JP Q16A Q16B 1-21 1-21 ME2 11L 11B 104 114 BY1 197 196 1F8 HUNTERSTON EAST 101 CRARAE AEPR DPR HUNTERSTON NORTH 14A (1) 16E 1SM 1SN 10W 10Z RH1 178 F19A 14B (2) RH2 126 16B 170 (2) 14V NEW CUMNOCK 16E(2) 13J(1) 13K(2) KILLIN 10X S13S F19B 18B XS2 FARIGAIG CFR1 13L CFR2 13R 179 HUNTERSTON 2 1 SN1 IAE IDW DPR 16F + - + - + - + - + - + - HUNTERSTON CONVERTER 2 1 to Flintshire Bridge 16W 1JZ 16U 16T LS1 LS2 LOCH BUIDHE 106 107 HKU2 1A0 THURSO SOUTH SPITTAL XR1 10M MELGARVE ELY1 GEL1 113 PM2 PM1 TP1 TP2 UT2 UT1 12L 12P 14Y 14Z 14W 15J 178 177 205 FOURSTONES to Tynemouth 1 2 101 ZW 14U 14R 14S FYRISH 12E 12F BFY2 FYL1 FYL2 1 2 14N LT1 G100 112 111 NES HUTTON 1 2 AIS 1W4 110 10A 1 2 TOMATIN 12Z 13H 15C 1B2 CMA2 CMA1 BC3 MAG1 17X 17Y 1LR BC4 17T MAG2 169 HS YZ2 YZ1 314 321 1 2 141 19H 19J VND1 VND2 NEW DEER 10P HR2 ROTHIENORMAN NSL NSL GIS GIS HR1 NDR2 XR2 10L 11C 11D A125 (2) A110 (1) LYNDHURST F105 F104 163 NEWTON STEWART GLENLUCE 1EK 1EH 1E5 1DZ 2 1 1D3 DLB1 DLB2 Creag Raibhach Dalchork 18P 16I 11O 1JQ 1GN 10V 11C 11D LEVEN CUPAR 1GB 1C1 1GM 1FK VV1 12B 10N 12D ALYTH (J) YZ2 1EZ 15K VV2 12C 11C SY1 1EW F117 143 144 11K SGT1B A:F45/W40 B:W60/L60 KERGORD 13N KB1 1F2 MK1 1F3 KINARDOCHY G901 11K 400 kV Circuit 275 kV Circuit 132 kV Circuit 33 kV Circuit 400 kV Substation 275 kV Substation 132 kV Substation Legend Legend 400 kV Circuit 275 kV Circuit 132 kV Circuit 33 kV Circuit 400 kV Substation 275 kV Substation 132 kV Substation Legend Note 1: Not all radial 132 kV circuits are indicated on this diagram Note 2: Substations and transmission circuits that are not entirely built do not appear in this map. Note 1: Not all radial 132 kV circuits are indicated on this diagram Note 2: Substations and transmission circuits that are not entirely built do not appear in this map.