Sustainable Power Sector Support Project (RRP SRI 39415) Detailed Description of Project Components A. Transmission system strengthening 1. This component will contribute to a reliable, adequate and affordable power supply for sustainable economic growth and poverty reduction in Eastern, North Central, Southern and Uva provinces. The strengthened transmission system will alleviate existing sub- standard voltage conditions in Ampara district of the Eastern Province and provide increased load capacity in the Eastern, North Central, Southern and Uva provinces leading to improved efficiency and reliability in power supply. The component includes the following sub-projects: (i) New Galle Power Transmission Development: Construction of New Galle 3 x 31.5 megavolt ampere (MVA) 132/33 kilovolt (kV) grid substation and Ambalangoda-to- New Galle 40 kilometers (km) double circuit 132 kV transmission line: T1a: New 3 x 31.5 MVA 132/33 kV New Galle Grid Substation Construction of a new grid substation at Galle comprising: 132 kV double busbar switchyard with: o 4 feeder bays o 1 static VAR compensator bay +10 megavolt ampere reactive (MVAr) to - 20 MVAr for voltage support o 3 transformer bays o 1 bus-coupler bay o 3 x 31.5 MVA transformers 33 kV switchyard with: o 3 transformer bays o 2 bus-section bays o 10 feeder bays o 2 generator bays o 6 capacitor bays with total of 30 MVA capacitors for loss reduction Control room and all associated communications, protection and control. This substation is located adjacent to the existing Galle 132/33 kV substation, which is old and cannot be extended further. The existing double circuit 132 kV transmission line from Balangoda grid substation to old Galle substation will be diverted into the New Galle grid substation. The other two 132 kV feeder bays will accommodate the new Ambalangoda-to-New Galle 132 kV double circuit transmission line (Item T1b). T1b: Ambalangoda-to-New Galle 132 kV Transmission Line Construction of a new Ambalangoda-to-New Galle 132 kV transmission line comprising: 40 km double circuit Zebra conductor with optical fiber ground wire (OPGW), connecting to: o 2 x 132 kV feeder bays at New Galle substation (Item T1a) o 2 x 132 kV existing feeder bays at Ambalangoda substation. 2 (ii) North East Power Transmission Development: Construction of Mahiyangana-to- Vavunativu (via Ampara) 129 km double circuit 132 kV transmission line; Monaragala-to-Madagama 16 km double circuit 132 kV transmission line; stringing of second circuit of existing Kotmale-to-New Anuradhapura 163 km 220 kV transmission line; Monaragala 1 x 31.5 MVA 132/33 kV grid substation; Vavunativu 2 x 31.5 MVA 132/33 kV grid substation; Pollonnaruwa 1 x 31.5 MVA 132/33 kV grid substation; and augmentation of existing Ampara 132/33 kV grid substation with 2 x 132 kV feeder bays. T2a1: New 1 x 31.5 MVA 132/33 kV Monaragala Grid Substation Construction of a new grid substation at Monaragala comprising: 132 kV single busbar switchyard with: o 2 feeder bays o 1 transformer bay o 1 bus-section bay o 1 x 31.5 MVA transformer 33 kV switchyard with: o 1 transformer bay o 4 feeder bays Control room and all associated communications, protection and control. The two 132 kV feeder bays will accommodate the new Medagama-to-Monaragala 132 kV double circuit transmission line (Item T2a2), which in turn will connect to the existing Badulla-to-Inginiyana hydropower station single circuit 132 kV transmission line. T2b New 1 x 31.5 MVA 132/33 kV Polonnaruwa Grid Substation Construction of a new grid substation at Polonnaruwa comprising: 132 kV single busbar switchyard with: o 2 feeder bays o 1 transformer bay o 1 bus-section bay o 1 x 31.5 MVA transformer 33 kV switchyard with: o 1 transformer bay o 4 feeder bays Control room and all associated communications, protection and control 0.5 km x 2 circuits 132 kV LILO (line-in, line-out) transmission line. Polonnaruwa grid substation will be connected in a LILO configuration to one circuit of the new Habarana-to-Valachchanai double circuit (with only one circuit to be strung initially) 132 kV transmission line, which is scheduled for construction by the Ceylon Electricity Board in 2011 under ADB’s Clean Energy and Access Improvement Project.1 The existing old single circuit Habarana-to-Valachchanai 132 kV transmission line will not connect to Polonnaruwa grid substation. 1 ADB. 2009. Report and Recommendation of the President to the Board of Directors: Proposed Loans, Grant, Administration of Grant, and Technical Assistance Grant to the Democratic Socialist Republic of Sri Lanka for the Clean Energy and Access Improvement Project. Manila. 3 T2c: New 2 x 31.5 MVA 132/33 kV Vavunativu Grid Substation Construction of a new grid substation at Vavunativu comprising: 132 kV single busbar switchyard with: o 2 feeder bays o 2 transformer bays o 1 bus-section bay o 2 x 31.5 MVA transformer 33 kV switchyard with: o 2 transformer bays o 8 feeder bays o 1 bus-section bay Control room and all associated communications, protection and control. The two 132 kV feeder bays will accommodate the new Mahiyangana-to-Vavunativu 132 kV double circuit transmission line (Item T2e). T2d Existing Ampara 132/33 kV Grid Substation Augmentation of the existing grid substation at Ampara comprising: Extension of 132 kV single busbar switchyard: o Additional 2 feeder bays. The two new 132 kV feeder bays will accommodate one circuit of the new Mahiyangana-to-Vavunativu 132 kV double circuit transmission line (Item T2e) in a LILO configuration. Ampara grid substation is currently supplied by a single circuit 132 kV transmission line from Inginiyana hydropower station, interconnected by the single circuit 132 kV transmission line to Badulla grid substation. The existing Inginiyana-to-Ampara transmission line does not meet modern standards and will need to be upgraded once Ampara is supplied by the new Mahiyangana-to- Vavunativu transmission line. T2a2: Medagama-to-Monaragala 132 kV Transmission Line Construction of a new Medagama-to-Monaragala 132 kV transmission line comprising: 16 km double circuit Zebra conductor with galvanized steel wire (GSW) earth conductors, connecting to: o 2 x 132 kV feeder bays at Monaragala grid substation (Item T2a1) o Existing Badulla-to-Inginiyana hydropower station single circuit 132 kV transmission line. T2e Mahiyangana-to-Vavunativu 132 kV Transmission Line via Ampara Construction of a new Mahiyangana-to-Vavunativu 132 kV transmission line comprising: 98 km double circuit Zebra conductor with OPGW, connecting to: o 2 x 132 kV feeder bays at Vavunativu grid substation (Item T2cd) o 2 x 132 kV feeder bays at Mahiyangana grid substation (new bays to be constructed by the Ceylon Electricity Board under separate government financing). 4 Construction of a new 132 kV LILO transmission line from 132 kV Mahiyangana-to- Vavunativu transmission line, to connect Ampara grid substation comprising: 31 km double circuit Zebra conductor with OPGW, connecting to: o Mahiyangana-to-Vavunativu 132 kV transmission line (Item T2e) o 2 x 132 kV feeder bays at Ampara grid substation (Item T2d). T2f: Second Circuit Stringing of existing 163 km Kotmale-New Anuradhapura 220 kV Transmission Line Stringing of a second circuit on the existing Kotmale–to-New Anuradhapura 220 kV transmission line comprising: 163 km second circuit Zebra conductor on the existing double circuit towers, connecting to: o Existing 132 kV feeder bay at Kotmale grid substation o Existing 132 kV feeder bay at New Anuradhapura grid substation. B. Expansion of rural electrification and distribution system improvement 2. This component will extend the low voltage system into remote villages and will enhance capacity and contribute to greater reliablity of the distribution network in Ampara district of the Eastern Province and Haldummulla and Ragala areas in Uva Province. The component includes the following sub-projects: (i) Ampara District Distribution Development (Eastern Province): Construction of 165 km, 33 kV medium voltage and 593 km, 0.4 kV low voltage distribution lines including 67 of 33/0.4 kV and 11/0.4 kV distribution substations to electrify 12,190 households.2 D1: Rural Electrification The rural electrification component in Ampara district will include: 63 distribution transformers, 3 phase, 100 kVA, 33/0.4 kV and 11/0.4 kV, total capacity of 6.3 MVA 4 distribution transformers, 3 phase, 160 kVA, 33/0.4 kV and 11/0.4 kV, total capacity of 0.64 MVA 165 km of 33 kV, 3 phase, overhead medium voltage distribution lines Racoon conductor 593 km of 0.4 kV, 3 phase, low voltage aerial bundled conductor overhead distribution lines Electrification of 12,190 rural households. The rural electrification component will connect new customers by extending the existing low voltage network. New distribution transformers will be installed where the existing distribution transformer capacity is insufficient or where voltage constraints require additional distribution transformers. (ii) Ampara District Distribution Network Reliability Improvement: Reliability improvement of 33 kV network comprising installation of 75 auto-reclosers and 100 load break switches 2 Poor households will be provided with a credit support to be recovered in installments over an extended period of time to enable them to finance initial connection charges. The credit will be available through the ADB's Clean Energy and Access Improvement Project (footnote 1) approved in 2009 and covering Ampara district among the three selected project districts. 5 D2: Distribution Reliability Improvement The distribution reliability improvement component will enhance the reliability and operational flexibility of the distribution network in Ampara district. This will be carried out by installing 33 kV auto reclosers and 33 kV load break switches in the existing medium voltage network.