Design and Installation of 66/11kV District Substation

4106 words (16 pages) Essay in Engineering

08/02/20 Engineering Reference this

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Contents

Introduction

Objectives

Purpose

Technical specification

Stakeholders

Project scope management plan

Work Breakdown Structure (WBS)

Time management plan

Cost management plan

Indicative cost estimates

Apportioning Cost Approach

Bottom up costing

Communication management plan

Procurement management plan

Quality management plan

Risk management plan

Change management plan

Ethical issues

Environment and sustainability

References

Appendix A

Appendix B

Introduction

New Zealand’s power intend to build a 66kv/11kv substation near MIT Manukau campus in Auckland. The proposed substation will have 66kv high voltage incoming line with several 11kv feeder lines going out. The incoming 66kv voltage will be stepped down to 11kv voltage through two 23MVA transformers [1]. The stepped down voltage will be evacuated and sent through the existing distribution line via underground cable. The built structure will take 3500m2 of the site which include the transformer, switchgears and the bus bars. There will be a switching control room of size 10*6.3*5m, about the size of a double garage. The site will be finished with natural colors (brown and green).

Objectives

New Zealand’s power key activity is to design and develop substation to supply energy for MIT Tech Park.

The main objective of New Zealand’s power is to ensure that supply of electricity is secure, reliable and affordable, service levels are met and maintained and investment is financially sustainable for short and long-term. [2]

This design and installation plan sets out overall framework for how New Zealand power addresses the needs through ensuring a robust approach in developing a substation.

Purpose

New Zealand’s power undertake projects to ensure that service levels, stakeholder interest and regulatory requirements are met for its electricity distribution networks.

The plan illustrates how New Zealand’s power achieves this by outlining management plan, budget plan, objectives, specification and strategies adopted by NZ’s power for its substation.

Technical specification

Two three phase 23MVA transformers will be used to step down 66kv to 11kv, which will then be carried by 4 feeder lines. As 66kv line enters the substation it will pass via C.T and V.T for protection purposes.   These transformers will be protected by surge diverters in case of lighting strike, connected in series with transformer. Two 11kv SF6 circuit breaker will be installed in which protects the assets, in case of any faults with in the system occurs. As nursing department is to be considered as well, there will be one harmonics filter supplying pure active power to the buildings as some of the equipment’s are very sensitive to distorted signals in the system. All the voltages and currents will be closely monitored with SCADA software. For inspection purposes advanced mobility tools will be running on tablets which increases productivity.

Stakeholders

New Zealand’s power key function is to understand and recognize who our stakeholders are, and what value are they of. The table below identifies the stakeholders for this project:

Stakeholders

Key interests

How stakeholder interest is identified

Client

Adequate and secure return on their investment

Public and employee safety

Briefings at the meeting

Government/Regulator

Economic efficiency

Compliance with standards set up

Submissions

Contractors services

Safe working environment

Consistency

Contractual requirements

Transpower

Reliability of supply

Direct communication

System operator communication

Table 1 shows list of the stakeholders [2] 

Project scope management plan

The scope of the project was developed by data collection process. A thorough analysis was done on client’s feedbacks and the current employees. From that information, project team developed the management plan.

This project includes designing and installation of 66-kv/11-kv substation which can supply the load to the tech park.

The project manager, client and the employees will play a key role in achieving the deliverables. As such, team member, project manager and client should know their duties. The table below outlines key roles of the personnel:

Name

Role

Duties

Manukau Institue of Technology

Sponsor

Agree or disagree with the scope of the project

Accept project deliverables

Sandy Tang

Project manager

Convey any extension changes

Evaluate and quantify scope

Facilitates meetings

Keeping up to date with the documents

Jogo Rabadia

Lead engineer

Convey any extension changes

Evaluate and verify scope

Pass over information of the outcome of the scope to the team

Buchki Veks

Team member

Assess the requirement for the extension changes and convey to the manager

Popu Mira

Team member

Assess the requirement for the extension changes and convey to the manager

Table 2 shows all the duties of different team members.

Work Breakdown Structure (WBS)

The project is broken down in 5 phase namely; designing, site preparation, procurement, installment of equipment and cleanup and commissioning. Each of this phase is then sub divided into other tasks which will require no more than 40 hours of work a week per worker and not less than 4 hours.

The diagram below shows how the structure will be divided and sub divided for the deliverable of the project.

Time management plan

Time management plan is developed by skillful people and from past experiences. Employee’s feedback was also taken into account when making the time plan. The project will be completed in four months, including all other factors which can cause delay to the project.

All the team player plays an important role in achieving the deliverables. Project manager will keep the record of the progress of the project and will pass over information to the employees and the clients whenever required. The table below shows how the task will be done:

Milestone

Start date

End date

Planning & designing

15/11/2018

30/11/2018

Site preparation including trenching

19/11/2018

25/12/2018

Installation of transformer and switch gear

25/12/2018

17/01/2019

Commissioning of transformer and switch gear

17/01/2019

25/02/2019

Other electrical work

20/02/2019

10/03/2019

Site improvements

10/03/2019

15/03/2019

Final testing and commissioning

12/03/2019

01/04/2019

Cost management plan

The cost management plan will define how the money will be used throughout project life cycle. The Performance of the project will be measured using Earned Value Management. The following metrics will be used:

  • Schedule variance(SV)
  • Cost Variance(CV)
  • Cost Performance Index(CPI)
  • Schedule Performance index(SPI)

The ratio for CPI and SPI are set to be 0.9 and 1.1, any ratios above or below the margin are questionable and the project manager will try to communicate the issue over the monthly meeting. In the case of extremes the project manager will come up with a Cost Variance Corrective Action Plan.

Various cost estimating techniques have been used to come up with a cost effective plan.

Indicative cost estimates

Description

Unit

Quantity

Rate

Amount

Direct Cost

plus 10%

m2

3500

900

3,150,000

315,000

Total direct cost

 

3,465,000

Inductive price

plus 10%

m2

3500

750 x 2

5,425,000

542500

Total inductive price

 

5,967,500

Note: 850 x 2 indicates, that indicative price is 2x direct cost.

Apportioning Cost Approach

Task

Percentage

Costs

Planning & designing

12%

378,000

Site preparation

10%

315,000

Procurement

70%

2,205,000

Installation and commissioning

8%

252,000

Total

100%

3,150,000

Note: Indicative cost (3,150,000) is set as the base line for the tasks and apportioned based on it.

Bottom up costing

Item

No.

Time(hours)

Rate($/hr)

Daily cost

Site

Excavator(4-4.9ton)

2

100

250

50,000

Truck

2

100

150

30,000

Operator

2

100

60

12,000

Driver

2

100

40

8,000

Civil works laborer

3

120

30

10,800

Concrete laying workers

3

100

45

13,500

Other laborers

Project manager

1

160

80

12,800

Electrician/Technician

2

120

65

15,600

Welders

1

100

60

6,000

Lead engineer

1

160

60.5

9,680

Team members

2

160

55

17,600

Total

185,980

Material and equipment

1,800,680

Total cost

 

1,986,660

Type of cost

Percentage of cost

Cost

Total cost

Nil

1,986,660

Direct Overhead

35% of D.C

695,331

Total direct cost

2,681,991

General & Admin cost

40% of T.D.C

1,072,796.4

Management contingency

35% of T.D.C

938,696.85

Profit

50% of T.D.C

1,340,995.5

Total project cost

 

5,632,181.1

Cash flow analysis

There are no cash flows as the project only includes expenditure.

Communication management plan

The communication management plan will define the communication requirements and how the information will be passed over. The intended audience of this CMP are project client, stakeholders, project manager and project employee. The table below shows the communication plan:

Communication type

Objective

Medium

Frequency

Audience

Start off meeting

Introduction of the project team and the project itself.

Face to face

Once

Sponsor

Stakeholders

Project team

Project team meeting

Review the status of project with team members

Face to face

Conference call

Weekly

Project manager

Technical design meeting

Review and design the technical specification of the project

Face to face

As required

Lead engineer

Project status meeting

Review the status of the project

Face to face

Conference call

Monthly

Project management office

Procurement management plan

Project manager will provide an overview and management of all procurement activities. The project manager will work besides the project team to identify all the procurement to be done to complete this project. Thereafter the project management office will look at the plan and will approach the supplier as required.

The following items listed below are proven essential for the project to be completed on time:

Item/services

Justification

Needed by

Digger

For trenching and digging of trams for the cable to pass

Site clean up

19/11/2018

Power transformers

For the connection of the high voltage cable from the national grid

25/12/2018

Circuit breakers

For protection of the instruments as they are vital part for the connection of the line to proceed

25/12/2018

Electrician/Technician

Responsible for physical connection according to the drawings

25/12/2018

Bus bar

For interconnection of the transformers

For connection of the load

15/01/2018

Insulators

To protect operators and the instruments

15/01/2018

Surge diverters

They are connected along side transformers to protect them

15/01/2018

In addition to the items listed above others player who are authorized for procurement of miscellaneous instruments are listed below:

Name

Role

Sandy Tang

Project manager

Jogo Rabadia

Lead engineer

Quality management plan

There is no quality management plan drawn up for this project. All the quality checks will be conducted by the project manger.

Risk management plan

The approach to the risk management plan is a methodological process by which the project team identifies and access any risk involved. Every effort will be made to proactively identify risk in order to develop and implement mitigation strategies. The most likely and high impact risk had been taken into account when developing the time management plan.

On the completion of the project the project manger will analyze the risk and the risk management plan. Based on this analysis the project management will identify and make improvements on how to avoid them in future projects.

Change management plan

 This the general change management plan for the company which is implemented on each and every project that we handle. The list below shows how the plan works:

  • Identifying the need for the change
  • Log the change in the logbook
  • Evaluation of the change
  • Submit change request to the client
  • If the client aggress on the change, project manager will implement the change.

Anyone from the client, stakeholder, project manager or other workers involved in the project can submit their change.

Ethical issues

This project will adapt with strong New Zealand code of ethics set up by engineering New Zealand.

All the employees will work with integrity, this will be achieved by assessing the characters of the employees.

Project manager will be required to report to stakeholders regarding any conflict of interest.

Employees will be required to act professionally and with the standards, this will be achieved by training employees.

Project manager are required to provide clients with fair, honest, complete and accurate information of the progress or any conflicts of interest in a timely-manner.

All the team members are required to maintain privacy of the client and the project unless granted permission to do so.

All members are required to take responsibility for their own action.

All members are required to interact with team and clients in a professional manner by respecting their culture or ethics. This will be achieved by educating project manager about the community.

Environment and sustainability

No harm will be caused to the local community and the bio diversity nearby during the course of this project. If required we will seek community feedback and explain them the importance of the substation. All the resources will be used effectively to complete the project on time and not exceeding the budget. Whenever required toolbox will be held to let the employees know about the potential hazard and how to avoid them.

References

[1]

W. K. N. A. N. A. G. Simon Mwangangi, “THE PROPOSED 66/11 kV KIAMBU ROAD SUBSTATION,” Kenya Power & Lightning Company Ltd., Nairobi, 2010.

[2]

D. U. S. Ltd, “Asset Management Plan Number 19,” Aurora Energy, Otago, 2012.

Appendix A

TechPark Substation

Details

RFx ID :

85462310

Tender Name :

Manukau Institute of Technology Tech Park Substation

Reference # :

Open Date :

Friday, 05 October 2018 4:00 PM (Pacific/Auckland UTC+12:00)

Close Date :

Friday, 04 November 2018 2:00 PM (Pacific/Auckland UTC+12:00)

Tender Type :

Request for Proposals (RFP)

Tender Coverage :

Sole Agency  [?]

Categories :

  • 22000000 – Building and Construction Machinery and Accessories
  • 23000000 – Industrial Manufacturing and Processing Machinery and Accessories
  • 26000000 – Power Generation and Distribution Machinery and Accessories
  • 27000000 – Tools and General Machinery
  • 30000000 – Structures and Building and Construction and Manufacturing Components and Supplies
  • 32000000 – Electronic Components and Supplies
  • 39000000 – Electrical Systems and Lighting and Components and Accessories and Supplies

Regions:

  • Auckland

Required Pre-qualifications :

None

Alternate Physical Delivery Address  :

Alternate Physical Fax Number  :

     Overview

  We need a design and installation plan for 66kv/11kv substation which can supply a load to our TechPark. It also includes maintenance and operations in RFP but you may opt out of this.

Appendix B

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