Ninghai Shuangyili Power Supply Project

This project is located in Ninghai County, Ningbo City, and is currently under construction. It involves the construction of a new 3.1-km-long 35-kV double-circuit overhead transmission line and a new 4.8-km-long single-circuit cable line. The overhead conductors will be JL/LB20A-240/30 aluminum-clad steel-core aluminum stranded conductors, the overhead ground wires will consist of two 24-core fiber-optic composite overhead ground wires, and the cables will be YJV-26/35-1×300 mm² cross-linked polyethylene-insulated power cables.

Major Overhaul of Aging Tower 7723 on State Grid Zhejiang Ningbo 110kV Caiyin Line 1297

This project is located in Yinzhou District, Ningbo City, and has now been completed and put into operation. The newly constructed line route has a length of 0.301 km. The new transmission conductors are JL/G1A-300/40 steel-core aluminum stranded conductors, and the two ground wires are both OPGW-13-90-1 optical fiber composite overhead ground wires.

Reconstruction of Tilted Tower Poles No. 11–14 on the 110 kV Guangda 1530 Line in Ningbo, Zhejiang Province, State Grid

This project is located in the Jiangbei District of Ningbo City and has now been completed and put into operation. The newly constructed transmission line has a length of 0.751 km. The new conductor is JL/G1A-300/40 steel-core aluminum stranded wire, and both ground wires are OPGW-13-90-1 optical fiber composite overhead ground wires.

Major Overhaul of Aging Tower 7722 on State Grid Zhejiang Ningbo 110kV Tunheng Line 1355

This project is located in Cixi City, Ningbo Municipality, and has now been completed. The scope of work includes the replacement of conductors and hardware at two locations on the 110 kV Tunheng Line 1355 that currently use explosion-pressed tubes: specifically, the three-phase conductors between Tower 8 and Tower 9, and the B and C phase conductors between Tower 22 and Tower 27. The total length of the replaced conductor section is 1.505 km, with the new conductors being JL/G1A-240/40 steel-core aluminum stranded conductors. The ground wires are all OPGW-10-50-1 optical fiber composite overhead ground wires, with a total length of 8.23 km.

Ningbo 110kV Juzi–Beilun Power Line 6–Power Line 7 Relocation and Reconstruction Project

This project is located in Beilun District, Ningbo City, and has now been completed. A new double-circuit overhead transmission line with a total length of 0.235 km has been constructed, utilizing JL/G1A-300/40 steel-core aluminum stranded conductors for the phase conductors and two OPGW-13-90-1 optical ground wires for the shield wires.

Lightning Protection Retrofit Project for Lines Including the 220 kV Jingzhou–24F4 Line of State Grid Zhejiang Taizhou

This project is located in Taizhou City and has now been completed. The scope of the project involves the installation of 360 sets of line surge arresters on seven transmission lines, including the 220 kV Jingzhou–Zhoushan Line 24F4.

State Grid Zhejiang Ningbo 220kV Beiwu–Beiai Power Transmission Line Relocation and Reconstruction Project

This project is located in Beilun District, Ningbo City, and is currently under construction. It involves the construction of 2.6 km of new double-circuit overhead lines and 2.74 km of new single-circuit overhead lines. Conductor: 2×JL/LB20A-630/45 aluminum-clad steel-core aluminum stranded conductor is used. Ground wire: Two OPGW-120 optical fiber composite ground wires are employed.

State Grid Zhejiang Taizhou 220kV Guanghai Line 2352 Guyed Tower and Ground Wire Renovation Project

This project is located in Linhai City, Taizhou. The project has now been completed. The renovation involves the construction of two new single-circuit angle-steel towers and the replacement of two ground wires between spans 24 and 43 with JLB20A-70 aluminum-clad steel stranded conductors, spanning a total route length of 8.355 kilometers. In addition, two existing single-circuit guyed towers have been dismantled.

Reconstruction Project for 220kV Jiaoda Line 2311 and Jiaopeng Line 2314, Sections 42–44

This project is located in Zhenhai District, Ningbo City, and is currently under construction. The project is being built to the “three-span” standard, with a newly constructed double-circuit overhead transmission line measuring 0.612 km in length. Conductor: 2×JL/G1A-630/45 steel-core aluminum stranded conductor. Ground wire: two 72-core OPGW optical fiber composite overhead ground wires are used.

220kV External Power Supply Supporting Project for the Xikou Traction Substation of the Yongjin Railway in Ningbo, Zhejiang Province

This project is located within Ninghai County and Fenghua District of Ningbo City and has now been completed. The 220 kV Xikou Traction Substation is supplied with power from the 220 kV Yancang Substation, and the newly constructed transmission line has a total length of 42.75 km. Conductor: 2×JL3/G1A-400/35. Ground wire: two 36-core OPGW cables.

EPC Project for the 220 kV Substation of Daxie Petrochemical Engineering Co., Ltd.

This project is an expansion project: 220 kV Section: (1) Increase the capacity of the 220 kV main transformers by 2 × 180 MVA, bringing the total capacity after the expansion to the final design level of 4 × 180 MVA. (2) Reactive power compensation: This phase of the expansion adds 4 × 10 Mvar of capacitive reactive power and 2 × 10 Mvar of inductive reactive power. Following this phase of the expansion, the reactive power compensation will reach the final design level of 8 × 10 Mvar of capacitive reactive power and 4 × 10 Mvar of inductive reactive power.

Ningbo Bank Jiangbei Data Center 35kV Yongxing Substation Project

This project is located in the Gateway Economic Development Zone of Jiangbei District, Ningbo City, and was successfully completed and put into operation in November 2018. The 35 kV Yongxing Substation is an all-indoor substation with a main transformer capacity of 2 × 16 MVA, expanding to a final capacity of 2 × 16 MVA + 2 × 10 MVA. The 35 kV system adopts a single-busbar sectionalized configuration, with two incoming feeders and four outgoing feeders, using cable-based connection for both incoming and outgoing lines. The 10 kV system also employs a single-busbar sectionalized configuration, with two incoming feeders connected directly to the busbar and eight outgoing feeders, all utilizing cable connections.

2021 Annual Comprehensive Overhaul of the 110 kV Substation in the Ningbo Area (Fan Shi Substation)

110kV Beilun Substation Renovation Project of the Beilun Ore Terminal Branch of Ningbo-Zhoushan Port Co., Ltd.

Scope of the renovation: installation of one new 110 kV main transformer and associated equipment, one new 110 kV SF6 switchgear bay, installation of 110 kV cables and accessories within the substation, and corresponding upgrades to the secondary control system.

110kV Step-Up Substation Project for the Cogeneration Upgrade and Renovation of Ningbo Jiufeng Thermal Power Co., Ltd.

Scope of the renovation: installation of one set of 110 kV main transformer and associated equipment, one new 110 kV SF6 switchgear bay, installation of 110 kV cables and accessories within the substation, and corresponding upgrades to the secondary control system.

110kV Substation No. 1 Main Transformer Renovation Project of Ningbo Haoyang New Materials Technology Co., Ltd.

Renovation scope for the 110 kV Haoyang Substation: Replace Main Transformer No. 1, with a voltage rating of 110/10 kV, with a 110 kV/35 kV unit rated at 50 MVA; replace the 10 kV switchgear with 35 kV switchgear; carry out on-site upgrade and retrofit of the SVC dynamic reactive power compensation system; and implement corresponding upgrades to the secondary control system.

New Construction Project for the Zhishan 110kV Substation

This project is the Zhishan 110 kV Transmission and Transformation Project in Ningbo City, with a main transformer capacity of 2 × 50 MVA and a semi-indoor design. The project site is located in Yangming Subdistrict, Yuyao City. Our company’s design institute is responsible for the electrical secondary construction drawing design and as-built drawing preparation technical services for this project. The project was successfully completed and put into operation in 2020.

220kV Tongshan Substation Renovation Project

This project involves the installation of two new 10 MVA shunt reactors at the reserved site within the Tongshan Substation’s 35 kV yard, the renovation of two 35 kV switchgear bays, and the addition of corresponding protection, measurement, and control devices to the electrical secondary system. The renovation was completed in December 2019.

220kV Cuiping Substation 220kV Busbar Sectionalization Renovation Project

This project involves the installation of one new 220-kV main bus section bay, one new 220-kV bus-tie second bay, and one new 220-kV main bus section II bus voltage transformer bay at the reserved site within the Cuiping Substation’s 220-kV yard. In addition, the secondary electrical portion of the project includes the addition of one 220-kV bus-section protection panel, one 220-kV bus-section measurement and control panel, one 220-kV bus-tie protection panel, one 220-kV bus-tie measurement and control panel, one 220-kV bus-setting measurement and control panel, and one set of 220-kV bus differential protection equipment. The renovation was completed in June 2021.

110 kV Zeshan Substation

This project is the Zeshan 110 kV Transmission and Transformation Project in Ningbo City, with a main transformer capacity of 2 × 50 MVA and a semi-indoor configuration. The project site is located in Guanhaiwei Town, Cixi City, and our company’s design institute is responsible for the civil engineering construction drawing design and as-built drawing preparation technical services. The project was successfully completed and put into operation in 2018.

110kV Main Substation Project of Ningbo Huatai Shengfu Polymer Materials Co., Ltd.

This project is the 110 kV main substation for Ningbo Huatai Shengfu Polymer Materials Co., Ltd., with a main transformer capacity of 2 × 63 MVA. The project is located in the Daxie Development Zone of Ningbo, and our design institute is responsible for the preliminary site survey, construction drawing design, as-built drawing preparation, and engineering management consulting services. The project was successfully completed and put into operation in 2019.

Ningbo Iron & Steel Co., Ltd. 220kV Yonggang Substation Capacity Expansion and Renovation Project

This project involves the expansion of Main Transformer No. 4, with a rating of 50 MVA. The transformer is a three-phase, step-down, on-load tap-changing, double-winding unit, operating at voltage levels of 220 kV/35 kV and designated as SFS-50000/220 kV. In the long term, the 220 kV outgoing lines are planned to comprise six circuits, configured in a double-bus, double-section arrangement; currently, three circuits have been commissioned, utilizing a double-bus configuration with indoor GIS equipment. During this phase, the substation control-layer equipment and the dispatch data network equipment will be upgraded concurrently. Our company is responsible for the preliminary site survey, construction drawing design, and as-built drawing design technical services for this project. The project was successfully completed and put into operation in December 2018.

Ningbo Haoyang New Materials Technology Co., Ltd. 110kV Substation

This project is the 110 kV user substation for Ningbo Haoyang New Materials Technology Co., Ltd., with a main transformer capacity of 1 × 50 MVA + 1 × 80 MVA. The project is located in the Binhai New City of the Yuyao Economic Development Zone. Our design institute is responsible for the preliminary design, construction drawing design, and preparation of as-built drawings for this project. The project was successfully completed and put into operation in 2017.

Grid Optimization Project for 10 kV Xinhai X104 Line, Chuangyuan X114 Line, and Other Lines in the Coastal Fourth Road Area of Hangwan, Ningbo

This project is located in Grid NBHWZN-01 of the Southern Zone of the Smart Industrial Park, which is bounded by Shitang Hengjiang Road, Xingci Eighth Road, Binhai First Road, and Xingci Sixth Road. The area is predominantly industrial land, with a Class B power supply zone. The grid is supplied by the 110 kV Haixing Substation, Yueci Bin Substation, and Binhai Substation, covering an area of 13.65 square kilometers. The current load stands at 52.78 MW. At present, the network configuration in this area—comprising the 10 kV Hangzhi B509 Line, Yuebin B523 Line, Yongheng B251 Line, and Jiutang B248 Line—is non-standard. In 2016, the maximum load factor on the Hangzhi B509 Line reached 92.86%, resulting in poor power supply reliability. Upon completion of this project, a new 007 line will be tapped from the No. 3 main transformer at the 110 kV Yueci Substation, and the Hangdi B516 Line, together with the 10 kV XinHai X104 Line and Chuangyuan X114 Line from the 110 kV Xinzhou Substation, will form one standard double-ring network. Simultaneously, the branch loads currently served by the heavily loaded Hangzhi B509 Line will be transferred to this new network, while the existing Hangzhi B509 Line, Yuebin B523 Line, Yongheng B251 Line, and Jiutang B248 Line will also be reconfigured into another standard double-ring network. In this way, two standard double-ring networks will be established, thereby achieving the target network configuration. As a flagship project representing the Ningbo Power Supply Company of State Grid Corporation of China, this project was submitted for the Zhejiang Provincial Electric Power Company’s evaluation of outstanding consulting achievements in power grid planning, feasibility studies, and specialized research, and was awarded the First Prize in the 2017 Distribution Network Feasibility Study category by the Zhejiang Provincial Electric Power Company.

10 kV Weitu B691 Line Renovation Project in Ningbo Hangzhou Bay New Area

The 10-kV Weitu B691 line, fed by the 110-kV Bailu Substation, primarily supplies power to the eastern reclamation area of the New District, covering a reclaimed land area of 67 square kilometers. Currently, the line is overhead, with the main feeder using LGJ-150 conductors and most branch circuits employing LGJ-120 or smaller conductors, resulting in relatively small cross-sectional areas. In 2015, the maximum load factor reached 63%. It is anticipated that the installed capacity for new infrastructure projects in the reclamation area between Piers 11 and 12 will reach 9,000 kVA, a demand that the existing line can no longer accommodate. To meet the growing regional load and enhance line interconnection, the renovation project for the 10-kV Weitu B691 line in the Ningbo Hangzhou Bay New Area takes into account the current overhead configuration of the 110-kV Bailu Substation–10-kV Weitu B691 line, its operational status, load registration data, and route alignment. The project involves undergrounding the main section of the Weitu B691 line from Pole No. 1 to Pole No. 20-20, constructing six new ring-main units along the route, and laying 3.4 kilometers of cable, thereby improving both the region’s power supply capacity and reliability. In addition, this project was selected as a representative initiative of the Ningbo Power Supply Company of State Grid Corporation of China for the Zhejiang Provincial Electric Power Company’s Quality Project Evaluation, ultimately ranking among the top 20 high-quality distribution network construction and renovation projects of State Grid Zhejiang Electric Power Co., Ltd. for 2017.

Technical Services Project for the Line Section of the 35 kV Power Supply Project (Phase I) in the Ningbo Petrochemical Zone

This project is located in the Zhenhai Petrochemical Zone, bounded by Wanghai South Road to the east, Haitian Middle Road to the west, Lanshan Road to the south, and Tongtu Road to the north. The project comprises two 220-kV Dian’gen Substation and two 220-kV Yanhai Substation, each of which supplies two 35-kV circuits to the Xiepu 35-kV Switchyard. <br/> (1) Route from the 220 kV Dian’gen Substation to the Xiepu 35 kV Switchyard: A double-circuit cable from the 220 kV Dian’gen Substation runs to Cable Terminal Tower No. 1; after the cable is brought up, an overhead line extends to the tower on the east side of Zhenpu Road, turns left and runs parallel to Lanshan Reservoir toward the north, then connects to Cable Terminal Tower No. 17, where the cable is brought down. The route continues along the north-side roadbed of Wanghai South Road to Xingye Road and Fengxiang Road, ultimately reaching the Xiepu 35 kV Switchyard. <br/> (2) Route from the 220 kV Coastal Substation to the Xiepu 35 kV Switchyard: The double-circuit cable outgoing from the 220 kV Coastal Substation turns left at the intersection of Yuejintang Road and Haifeng Road, then turns right at the intersection of Haitian Middle Road and Haifeng Road, and finally runs along the west-side roadbed of Haitian Middle Road to the Xiepu 35 kV Switchyard.

220kV Xianxiang Substation–Ningbo Boway 35kV Power Pipeline Project

Ningbo Boway New Materials Co., Ltd. is a wholly owned subsidiary of Ningbo Boway Alloy Materials Co., Ltd. and was established in 2018. The company’s products are primarily used in high-end markets such as the smart internet, smart terminal devices, new-energy vehicles, and semiconductors, meeting the needs of Fortune Global 500 companies and industry-leading benchmark enterprises. <br/> This project is the 35 kV Boxin Substation transmission and transformation works constructed to support Ningbo Bowei New Materials Co., Ltd.’s annual production project for 50,000 tonnes of special alloy strip. The main transformer capacity is 2 × 16,000 kVA, with a single-circuit power supply. A new 35 kV transmission line is built to connect to the 35 kV bay at the 220 kV Xianxiang Substation. The new line employs a combined cable-and-overhead installation method, with a total length of approximately 10.96 kilometers. The entire substation adopts an all-indoor design, with protection and monitoring equipment arranged in a hierarchical, distributed configuration and a comprehensive automated control scheme.

35kV Substation Project of Ningbo Rongbai New Energy Technology Co., Ltd.

Ningbo Rongbai New Energy Technology Co., Ltd. is a high-tech new-energy-materials enterprise controlled by Beijing Rongbai Investment Holding Co., Ltd., and operates as a multinational group specializing in the R&D and commercialization of cathode materials for lithium-ion batteries. To support the company’s development, it has undertaken the “Annual Expansion and Upgrade Project for a 33,000-ton-per-year Production Line of Ternary Cathode Materials for Power Lithium-Ion Batteries,” which includes the construction of a 35-kV substation with two main transformers, each rated at 10 MVA, one 35-kV incoming feeder, and seven 10-kV outgoing feeders. The substation is a three-story above-ground structure, with a total project investment of approximately RMB 22 million. Our company provides end-to-end technical services for this project, including the feasibility study report on the grid connection system, preliminary design, and detailed civil and electrical construction drawings.

Ningbo Oriental Cable Co., Ltd. 35kV Dedicated Transformer Connection System

Ningbo Oriental Cable Co., Ltd. has constructed a new 35-kV substation to support the implementation of the “Demonstration Project for the Application of High-End Marine Energy Equipment Systems.” The grid connection scheme for this project is as follows: a new 35-kV transmission line will be built to connect to the 220-kV Houdun Substation; two main transformers, each with a capacity of 12.5 MVA, will be installed; one 35-kV incoming feeder and eleven 10-kV outgoing feeders will be provided. The substation adopts an all-indoor layout and is configured as a single-story above-ground structure. During the design phase, multiple optimization iterations were conducted in consultation with the client to achieve a compact and rational electrical layout, thereby minimizing the footprint and reducing capital investment.