Decision 4274/QD-BCT in 2018 approving the electricity development planning of Hai Phong city for the period 2016-2025 with a vision to 2035 - The 110 kV power system development planning issued by the Minister of Industry and Trade

DECISION

APPROVING ELECTRICITY PLANNING OF HAI PHONG CITY DURING 2016 – 2025 WITH AN ORIENTATION TOWARDS 2035 – PLANNING FOR 110 KV SYSTEM

MINISTER OF INDUSTRY AND TRADE

Pursuant to the Law on Electricity dated December 03, 2004 and the Law dated November 20, 2012 on amendments to the Law on Electricity;

Pursuant to the Government's Decree No. 137/2013/NĐ-CP dated October 21, 2013 elaborating the Law on Electricity and the Law on amendments to the Law on Electricity;

Pursuant to the Government's Decree No. 98/2017/NĐ-CP dated August 18, 2017 on functions, tasks, entitlements and organizational structure of the Ministry of Industry and Trade;

Pursuant to Circular No. 43/2013/TT-BCT dated December 31, 2013 on procedures for formulating , approving and revising electricity planning;

In consideration of request of the People’s Committee of Hai Phong city in document No. 112/TTr-UBND dated August 14, 2018; Document No. 3058/EVNNPT-KH dated September 04, 2018 of National Power Transmission Corporation, document No. 3725/EVNNPC-KH+KT+ĐT dated September 7, 2019 of Northern Power Corporation; Official Dispatch No. 6512/UBND-CT dated October 11, 2019 of the People’s Committee of Hai Phong city and document No. 1456/VNL-P8 dated October 03, 2019 of Institute of Energy enclosed with documents about revisions to the Scheme of October 2018;

At the request of Director of Electricity and Renewable Energy Authority.

DECIDES:

Article 1. Approving electricity planning of Hai Phong city during 2016 – 2025 with an orientation towards 2035 – Planning for 110 kV system

1. Development orientations

a) General orientations

- Development the transmission and distribution grid together with socio-economic development in each area and sub-area therein, ensure increasing quality and reliability of electricity.

- Ensure that the development of the transmission grid matches that of power plants in order to achieve overall efficiency of the national and local electricity systems; suitable for the electricity industry development strategy, electricity planning and other planning of the area and sub-areas therein.

- Build transmission lines suitable for long-term development. Ensure the grid meets of N-1 standards for reliability, the structure of the grid ensures high flexibility of management and operation. Carry out modernization and undergrounding at tourist attractions, industrial parks and urban areas in the city; minimize negative effects on the landscape and the environment. Improve stability, reliability of power supply and minimize power loss. Ensure effective and economic use of electricity; attract investment in projects that have modern and energy-saving technologies.

- Improve power supply reliability; apply technological advances and smart grids in grid operation: (i) develop and complete SCADA system; (ii) Organize remote control centers; build unmanned substations; (iii) Develop electronic meters and a system for remote collection of power consumption data; (iv) Build a smart grid system that facilitates interaction between the supplier and clients; (v) Apply advanced technologies such as: large-scale monitoring system, transmission line temperature monitoring system, system for fault detection, live-line working of electrical and compensating devices.

- Medium-voltage (MV) grid of the city is 22 kV. The 10 kV grid will be upgraded to 22 kV by 2020. During 2021 - 2025, the 35 kV grid will be used in Do Son, Hong Bang, Kien An district; 22 kV grid will be used in Kien Thuy and An Duong district. The 35 kV grid in other areas will be changed to 22 kV in later periods. Build underground cable systems in urban districts, towns of suburban districts, new residential areas, industrial parks, etc.; gradually replacing existing overhead lines in urban districts and towns of suburban districts with underground cables to preserve urban landscape.

b) Criteria for development of 220 kV and 110 kV grids

- Structure: the design of 220 kV and 110 kV grids shall ensure reliability and quality of electricity throughout their normal operation and in case of separate faults according to applicable regulations. The 220 kV and 110 kV grids shall ensure backups for development during next periods.

- 220 kV and 110 kV lines:

+ The design of 220 kV and 110 kV grids shall ensure that each 220 kV or 110 kV substation is supplied from at least 02 power sources (possibly from 2 busbar sections of the same power plant or a 500 kV or 220 kV substation)

+ 110 kV substations are continuously connected to ensure flexibility; the 110 kV grid may be run open-circuited to reduce short-circuit current.

+ Consider using compact poles for 220 kV and 110 kV lines or use underground 220 kV cables in downtown areas of cities of Class II or above to preserve urban landscape and meet power supply safety standards.

+ Cross-sectional area of cables: for overhead 220 kV lines, use multiple-phrase cables that with a cross-sectional area of ≥ 600 mm2 with preparation for next periods; use cables with a cross-sectional area of ≥ 300 mm2 for 110 kV lines. The cross-sectional area of underground cables shall satisfy the same standards for overhead cables.

- 220 kV and 110 kV substations:

+ Each 220 kV or 110 kV substation shall have 2 – 4 transformers. The capacity of the transformers shall satisfy N-1 standards in the heaviest load scenario of the local grid.

+ The busbar diagram on the 220 kV and 110 kV side of a 220 kV substation shall ensure flexibility and can be divided into at least 2 sections without reducing local power supply reliability.

+ 220 kV and 110 kV shall have adequate land area for installation of reactive power compensation devices or Flexible AC transmission system (FACTS).

+ Transformer power rating: use transformers with power rating of ≥ 220 MVA for the voltage of 220 kV; 25 MVA, 40 MVA, 63 MVA for the voltage of 110 kV; the power ratings of transformers at clients’ load stations may vary according to the load. The transformer power rating shall be suitable for local load density.+ Radial 22 kV networks shall be used for assistance in power supply between 110 kV substations.

c) Criteria for development of medium voltage grids

- Grid structure:

+ In urban districts, new urban areas, towns and important loads, the grid shall have radial and open-circuited structure; in rural areas, the grid shall have linear structure.

+ Radial medium voltage networks will carry 60% - 70% of the maximum load during normal operation.

- Cross-sectional area of cables:

+ In urban areas, new urban areas, tourist attractions, industrial parks: Main lines: use underground or overhead XPLE cables with a cross-sectional area of ≥ 240 mm2 or overhead insulated aluminum conductor steel-reinforced (ACSR) cables with a cross-sectional area of ≥ 185 mm2; branches: use XPLE cables with a cross-sectional area of ≥ 240 mm2 or insulated ACSR cables with a cross-sectional area of ≥ 95 mm2.

+ In suburban areas and rural areas: Main lines: ACSR cables with a cross-sectional area of ≥ 185 mm2; Main branches for 3-phase power supply in communes and neighborhood: ACSR cables with a cross-sectional area of ≥ 70 mm2.

- Distribution transformer ratings:

+ In urban districts, new urban areas, towns: use 3-phase transformers with a rating of at least 400 kVA;

+ In rural areas: use 3-phase transformers with a rating of 250 - 560 kVA;

+ Special substations shall be designed according to the clients’ load.

2. Development targets

a) Synchronously develop the transmission grid and distribution grid within Hai Phong city to achieve GRDP growth of 13,5% per year during 2016 – 2020, 13% per year during 2021 - 2025, 12,5% during 2026 - 2030, 11% per year during 2031 – 2035. Power demands in the years:

- 2020:

Maximum power Pmax = 1.348 MW, commercial production = 7.118 million kWh. Annual commercial production growth rate during 2016-2020 is 13,5% per year, including: Industry – Construction: 16,5%; Agriculture – Forestry - Aquaculture: 24,4%; Commerce – Services: 18,6%; Administration – Domestic use: 8%; Other activities: 10,9%. Commercial production per capita: 3.422 kWh per person per year.

- 2025:

Maximum power Pmax = 2.112 MW, commercial production = 11.241 million kWh. Annual commercial production growth rate during 2021-2025 is 9,6 % per year, including: Industry – Construction: 10,4%; Agriculture – Forestry - Aquaculture: 12,9%; Commerce – Services: 14,1%; Administration – Domestic use: 7%; Other activities: 8%. Commercial production per capita: 5.103 kWh per person per year.

- 2030: Maximum power Pmax = 2.986 MW, commercial production = 16,05 billion kWh. Annual commercial production growth rate during 2026- 2030 is 7,4% per year, including: Industry – Construction: 7,1%; Agriculture – Forestry - Aquaculture: 8,3%; Commerce – Services: 12,6%; Administration – Domestic use: 6,6%; Other activities: 6,8%. Commercial production per capita: 6.881 kWh per person per year.

- 2035: Maximum power Pmax = 3.989 MW, commercial production = 21,57 billion kWh. Annual commercial production growth rate during 2031 – 2035 is 6,1% per year, including: Industry – Construction: 5,4 %; Agriculture – Forestry - Aquaculture: 5,8%; Commerce – Services: 11%; Administration – Domestic use: 6,1%; Other activities: 5,8%. Commercial production per capita: 8.736 kWh per person per year.

Detailed power demands of load components are provided in Appendix 1 hereof.

b) Ensure safe and reliable power supply to serve economic development and social security.

c) Establish plans for connection of power plants in the city to the national electricity system; ensure reasonable use of power sources and stability of local electricity systems.

3. Grid development planning

Scales and schedules of construction of lines and substations over different periods:

a) 220 kV grid:

- 2018-2020:

+ Substations: Build 3 new 220 kV substations with a total power rating of 750 MVA; Renovate and upgrade 2 existing 220/110 kV substations with a total increase in power rating of 375 MVA.

+ Power lines: Build new 220 kV lines with a total length of 20 km to connect new 220 kV substations to the system;  Renovate 72 km of the 220 kV line.

- 2021-2025:

+ Substations: Build 1 new 220 kV substation with a total power rating of 250 MVA; Renovate and upgrade 4 existing 220 kV substations with a total increase in power rating of 875 MVA.

+ Power lines: Build 4 new 220 kV lines with a total length of 73 km.

- 2026-2030:

+ Substations: Build 3 new 220 kV substations with a total power rating of 750 MVA; Renovate and upgrade 3 existing 220 kV substations with a total increase in power rating of 750 MVA.

+ Power lines: Build 6 new 220 kV lines with a total length of 170 km.

- 2031-2035:

+ Substations: Renovate and upgrade 7 existing substations with a total increase in power rating of 1.625 MVA.

b) 110 kV grid:

- 2018-2020:

+ Substations: Build 14 new 110 kV substation with a total power rating of 817 MVA; Renovate and upgrade 12 existing 110 kV substations with a total increase in power rating of 582 MVA.

+ Power lines: Build 29 new 110 kV lines with a total length of 253 km. Renovate 11 existing 110 kV lines with a total length of 191 km.

- 2021-2025:

+ Substations: Build 15 new 110 kV substations with a total power rating of 871 MVA; Renovate and upgrade 16 existing 110 kV substations with a total increase in power rating of 901 MVA.

+ Power lines: Build 17 new 110 kV lines with a total length of 171,4 km. Increase the gauges of 2 existing 110 kV lines with a total length of 38 km.

- 2026-2030:

+ Substations: Build 15 new 110 kV substations with a total power rating of 792 MVA; Renovate and upgrade 19 existing 110 kV substations with a total increase in power rating of 887 MVA.

+ Power lines: Build 22 new 110 kV lines with a total length of 156,4 km.

- 2031-2035:

+ Substations: Build 5 new 110 kV substations with a total power rating of 277 MVA; Renovate and upgrade 26 existing 110 kV substations with a total increase in power rating of 1.211 MVA.

+ Power lines: Build 7 new 110 kV lines with a total length of 38 km. Renovate and extend 2 existing 110 kV lines with a total length of 24 km.

Appendix 2 contains the list of 220 kV and 110 kV power lines and substations to be put into operation for the period 2018-2025; Appendix 3 for the period 2026-2035; detailed connection diagram is provided in drawing D864-HP-02 enclosed the planning documents.

c) MV grid for 2018-2025 period:

- Substations:

+ Build 1.884 new 35/0,4 kV, 22/0,4 kV, 35(22)/0,4 kV distribution substations with a total capacity of 1.984.700 kVA;

+ Upgrade 540 existing 22/0,4 kV, 35/0,4 kV substations with a total increase in capacity of 105.100 kVA; increase the voltage of 937 existing substations with a total capacity of 453.900 kVA being upgraded to 22 kV, 35 kV.

- Power lines:

+ Build new underground 35 kV, 22 kV cables with a total length of 871 km;

+ Build new overhead 22 kV, 35 kV cables with a total length of 410 km;

+ Put the MV grid underground; increase the wire gauge and change the voltage from 35 kV to 22 kV: total length of 434 of 22 kV and 35 kV lines.

d) Low-voltage (LV) grid for 2018-2025 period:

- Build 1.128 km of new 0,4 kV lines;

- Renovate 246 km of LV lines;

- Install 59.408 new electricity meters.

The MV and LV grids shall be specified in the detailed plan for medium-voltage and low-voltage grids after 110 kV substations (Part II) of electricity planning of Hai Phong city during 2016 – 2025 with an orientation towards 2035.

e) Renewable energy:

- By 2025, build 10 MW of solar power sources and 20 MW or wind power sources in Dinh Vu Industrial Park and Nam Dinh Vu 2 Industrial Park. Carry out research into development of grid-tied solar power sources with a capacity of about 5 MW in Dinh Vu Industrial Park, 20 MW in VSIP Hai Phong Industrial Park, 10 MW in Nam Cau Kien Industrial Park; build 3 grid-tied waste-to-energy plants with a capacity of about 5 MW in Tran Duong Waste Treatment Facility (Vinh Bao district); 3 MW in Gia Minh Solid Waste Treatment Complex (Thuy Nguyen district); 2 MW in Hai An Solid Waste Treatment Complex (Hai An district).

- On Bach Long Vy island: develop combined power supply sources from wind energy, solar energy, diesel and energy reserve; By 2020: install 2 diesel generators with a total capacity of 2 MVA, 1 MW of wind power, 500 kWp of solar power and 7,48 MWh of energy reserve. On Long Chau island: it is planned to supply power from an independent solar photovoltaic system array with a total capacity of 1,65 kW.  Total investment in off-grid power supply systems in remote areas and islands during 2018-2025 is about VND 169 billion from central government budget or 85% ODA (15% from local government budget).

f) Investment capital:

During 2018 – 2025, total investment in building new and renovating existing grids from low-voltage to 220 kV is approximately VND 16.618 billion.

Article 2. Organization of implementation

1. The People’s Committee of Hai Phong city shall announce the planning, reserve adequate land area for the works in the approved planning; instruct Department of Industry and Trade of Hai Phong city to prepare Part III of electricity planning for Hai Phong city during 2016-2025, with an orientation towards 2035: development of MV and LV grids after 110 kV substations.0}

2. EVN, National Power Transmission Corporation, Northern Power Corporation and investors shall cooperate with the authorities of Hai Phong city in organizing implementation of this document. During the process of investment in transmission and distribution grids, electricity supply units shall adhere to the approved grid structure, scale and voltage; comply with applicable regulations on electricity transmission system and distribution system.

3. Department of Industry and Trade of Hai Phong city shall request consultancy units to prepare the plan for completion of the planning documents in accordance with this Decision and send the completed documents to Electricity and Renewable Energy Authority – the Ministry of Industry and Trade, the People’s Committee of Hai Phong city, Department of Industry and Trade of Hai Phong city, EVN, National Power Transmission Corporation, North Power Corporation and Hai Phong Power Company.

4. Department of Industry and Trade of Hai Phong city shall monitor, inspect and administer the implementation of the approved planning. Managing, operating units, investors in power sources and power grids in Hai Phong city (Hai Phong Power Company, North Power Corporation, National Power Transmission Corporation, EVN, etc.) shall submit periodic reports on implementation of the master plan to Department of Industry and Trade of Hai Phong city.

Article 3. Chief of the Ministry Office, Director of Electricity and Renewable Energy Authority, the President of the People’s Committee of Hai Phong city, director of EVN, director of National Power Transmission Corporation, director of Hai Phong Power Company, director of North Power Corporation and relevant authorities are responsible for implementation of this Decision./.

APPENDIX 1

ELECTRICITY DEMAND IN HAI PHONG CITY DURING 2020-2025-2035

APPENDIX 2

LIST OF GRID WORKS TO BE BUILT DURING 2018-2025

Table 2.1. Scale and initiation time of 220-110 kV lines in Hai Phong city

(*) Revisions to the schedule for construction of the 220 kV line between the 220 kV An Lao substation and 220 kV Cat Hai substation will be specified in a separate scheme, which will be submitted to the Prime Minister for approval.

Table 2.2. New construction, renovation and upgrade of 220 kV and 110 kV substations in Hai Phong city during 2018-2020

(*) Revisions to the schedule for construction of 220 kV An Lao substation and 220 kV Cat Hai substation will be specified in a separate scheme, which will be submitted to the Prime Minister for approval.

Table 2.3. New construction, renovation and upgrade of 220 kV and 110 kV substations in Hai Phong city during 2021-2025