New Substation proposal

Take a look at this.

"E" Powerline Trades LLC

Your question is extremely broad and cannot be answered on a forum such as this.

I'd take some planning courses, or get a job in the industry.

We are proposing a new substation in our area. But we have to submit a detailed report that the substation is inevitable at that area. What are the factors to be considered?. Now this area is feeding from two substations.

Regards

BIJU

You should hire a competent civil, or electrical engineer. We can't educate you over the internet.

Very few competent engineers will have experience in this question. There are typical application processes for new development. It is largely bureaucratic and driven by utilities and State Corporation Commission. If you are planning a development project that will require a planning approval. part of that process will involve traffic, water, sewer, storm runoff, property tax, architectural review and many other factors. If you simply perceive a deficiency in your local power net, I would suggest a meeting with your local utility service, escalating up the chain if necessary. (They usually have very long chains)

You can justify the immediate need by examining the current loading on the existing substations and compare that to the substation rating and your network's accepted(or documented) factor of safety.

You can justify expansion by analysing demand growth and determining when the existing network elements will be operating outside the factor of safety.

Thank u for the reply

Do u have any procedure for the same??.

Rgds

BYJU

Wal has it right.

For further clarification, most electric distribution systems are designed for N-1, with N being the quantity of a specific type of component (transformer, bus, breaker, etc.). N-1 means that the entire load can still be supplied when the largest single component is out of service. If you can't take a piece of equipment out of service for maintenance without turning off customers, your system design is inadequate.

Quote "We are proposing a new substation in our area. But we have to submit a detailed report that the substation is inevitable at that area."

Been there. Done that for many years. My bags are packed and ready to go. If needed, I will send address for you to forward the check.

By the way, do you have a load flow study for your subs?

Thank u for the reply

What are the factors to be considered for a load flow study ?. Do u have any procedure?.

Rgds

BYJU

Procedure as follows:

byjuram sends RFQ to wareagle Titled Provision of Consultancy services for load flow study and preparation of capex proposal re: New Subsation.

wareagle sends quotation to byjuram. Line items for consultancy and mobilisation with notes stating that local transport and accommodation supplied by customer plus perdiem and that customer is to ensure unhindered access to all data. Terms: Advance 40%, and 60% (in Escrow) on completion. (nett of all local taxes)

Byjuram sends PO to wareagle

Wareagle sends invoice (40%) to byjuram.

Byjuram pays advance.

Wareagle mobilises.

Byjuram gets a solution and learns something.

Wareagle invoices for balance.

balance released from Escrow.

Everybody happy.

Quote Byjuram "What are the factors to be considered for a load flow study ?. Do u have any procedure?."

You are not ready to handle this project. Get your company to hire an experienced engineer to assist you. This is a little more complex that you realize.

byuram,

All the gurus are right. Your project is a capex project. Such projects are accomplished in a team of people from required discipline, which are civil engineer for civil works, electrical engineer for electrical works, building engineer for substation building design, and others from your maintenance operations who manages the other substations, the finance people, public relations, the lands people, and government statutory bodies.

1. Draw Project Plan:

Establish a preliminary project plan for the project with all tasks listed to be done in certain logical/chronically time periods. As you progress you may change the times as required in certain tasks. Then you may come with a final project plan to stick to.

2. Investigating & Scoping:

Do load flow analysis of current consumer load from the other substation and determine how much load the new substation will take up. Do future load forecast of the areas which the new substation will supply. Do ROI (Return On Investment) for the current loading and future loading because it's a capex project. Study the geography of the area where the substation will be built in relation to the routing of transmission and distribution lines. Study the weather pattern in the area where the substation will be build, you will need weather data of rain, wind, sun, lighting days, thunder days for earthing/protection design, and to determine the weather pollution on substation transformers and instruments.

3. Design:

Electrical design of substation electric, that is the incoming transmission line, step down power transformers/step up power transformers, C.Ts and V.Ts metering, surge arrestors, switching design, protection and earthing design, and safety of the surrounding lively hood. Civil design of the substation ground works. Building design of the substation building. Get quotes on all design works, construction works, and consultancy works of the substation, and compile a project cost estimate of all works including equipment hire and labour, and probably say 15 percent or more/less, contingency on the the total cost. Determine if some works will be contracted, and if so, what is the level of contract agreement which will be agreed upon between you and the consulting engineer.

4. Proposal:

Write your proposal/business paper, stating the project's scope, designs, mobilisation of equipment and labour, who are the consulting engineers, who will supply the materials (transformers, switch gear, protection equipment ect.), who will be doing the construction of each stages, and the costs involved. State also the loading plan as compared to the other substations, loading focus, future load forecast, and the ROI. Importantly, include the Project Plan.

5. Management/Board Approval:

Submit proposal/business paper to management/board for approval. Before you submit, be certain that this is the final documented presentation of the proposal. Because after it is approved, the project becomes a capex with money allocated as per your proposal. That when the actual work starts and the costs are higher, you may have to seek the boards/managements approval with another paper for additional funding, and this sometimes dose not reflect well on the lead project engineer, unless he's got good reasons.

6. Finance:

The project is then put to the finance people to open a capex account for the project, so as to have all financial transactions of the project docuemented.

7. Hiring, Buying, Mobilisation & Construction:

Actual works involved in the project begins. You may review your project plan if changes are required.

8. Inspection, Testing & Commissioning.

At the completion of the project, the substation is inspected, tested, and commissioned into service.

This is only a short summary. I may have missed out some processes. This is a big job and requires communications and meetings with those who will be affected and those who are in direct action from the other substations, and the managers.

Dear Sir,

Thank you for your detailed reply.

Regards

BYJU

Assistant Executive Engineer