Creating balance within and between networks
In power grids, phase-shifting transformers provide active power flow control. By enforcing or blocking loads, they not only improve the stability and flexibility of grids but also help grid operators get the most out of existing hardware. Ratings: ≤ 1.200 MVA ≤ 765 kV Features: Compact design; low noise; high phase-shift capability Options: Ester insulation; low noise, etc.
Description
An efficient and cost-effective way to control power flow
In an increasingly complex power-generation landscape and a growing energy market, the capability to control the flow of power is fast gaining in crucial importance. This is the area, where phase-shifting transformers (PST) excel. They protect lines, make grids more reliable, and reduce transmission losses. And they are among the most economic and cost-efficient solutions for power-flow management out there.
Avoid expensive grid extensions
In a grid struggling with unwanted power flows from adjacent networks – for example, due to the hard-to-control feed-in from renewable power plants – phase shifters protect from additional loads. By changing the effective phase displacement between the input voltage and the output voltage of a transmission line as needed, phase shifters enforce, block and even revert power flow as well as reduce or eliminate loop flows. Phase shifters can rebalance line loading between parallel lines or network sections.
Grid operators use this capability to increase the transmission capacity of the network, while minimizing expensive grid expansions. A decisive step toward ensuring the stability and reliability of your own grid and enabling strategic energy planning.
Operators can use phase shifters to…
- balance in the increasing amounts of renewable power.
- stabilize power flow over long transmission distances between power generation centers and load centers.
- control high-volume electricity trading between countries or different system operators.
- reliably satisfy local peaks in electricity demand in urbanized areas.
- provide electricity-intensive plants with energy directly from neighboring small power plants, e.g. CHP .
We give you flexibility, reliability, and efficiency
Siemens’ sustained experience in phase-shifter design and rigid dedication to quality not only ensure smooth and on-time project execution. More importantly, they ensure that customers enjoy the full benefits of reliable performance over the long service life of their custom-designed unit. However, there are more advantage to relying on Siemens for a phase-shifting transformer:
Economic Efficiency
Get the most out your phase-shifter
As the most cost-efficient solution for power flow control, phase-shifting transformers contribute to the financial success of grid operators in a competitive energy environment. With their trademark reliability and efficiency, Siemens' tailored-to-fit phase shifters come with a wide range of competitive advantages. But what really makes Siemens transformers stand out is the extensive in-depth design and spec support.
Creating a perfect fit for your grid
Once specifications have been set, a tender can only achieve so much in ensuring a cost-efficient result. Therefore, Siemens offers customers a collaborative and iterative approach to defining specifications. The experts of Siemens Power Technologies International (PTI) share their insights into which combinations of specifications drive cost and performance, while the customer’s network planners have a clear picture of the required capabilities their new transformer.
This Siemens approach combines their expertise to give customers a perfectly tailored transformer – the most cost-efficient and robust solution to the performance they need.
How Siemens‘ phase-shifting transformers benefit operators
At the company level, by
- Increasing grid stability
- Creating greater flexibility in accommodating network changes
- Offering greater independence from other grid operators
In their business performance, by
- Increasing active power capacity of grid
- Allowing for direct power sourcing
- Enabling commercial trading
- Providing a cost-efficient solution for power flow control
- Optimizing losses*
- Giving operators greater leeway in planning major grid extension investments
During operation, by
- Controlling flow control and regulating voltage
- Stabilizing the grid
- Reducing or increasing active power loading of specific lines
- Preventing line overloads
- Blocking – or even reversing – power
- Reducing and/or eliminating loop flows
* Depends on ratio of impedances-line resistances
Design
A holistic approach: from customer challenge to energization on site
With Power Technologies International (PTI), Siemens has established a service that goes beyond finetuning customer requirements. Its subject-matter specialists run grid studies that go toward building a comprehensive profile to answer the key question: What capabilities does the phase shifter need to solve the customer’s pain points?
Transcending the specs
This holistic approach ensures that a customer’s specific needs and situation inform all decisions, from the very first project stage to the energization on site. PTI’s unique perspective produces phase shifters, which not only are built to specs, but come with greater flexibility in addressing the customer’s challenges.
Customers benefit from…
- Siemens in-depth know how in designing phase-shifting transformers
- more than 50 years of experience in phase-shifter design
- specialist designers and phase-shifter design tools
- design rules and tools with a track record of excellent test results and highest ratings
- a multitude of options, from dual-tank solutions with “faltenbalg” to oil-oil bushings
Quality
nsuring quality in the supply-chain
Siemens Transformers rigorously vets its suppliers. Selected partners comply with the Siemens supply-chain standards, emphasizing total cost, commitment to quality, and environmental awareness.
Siemens' dedication to quality ensures...
- a precise manufacturing process with very low manufacturing tolerances
- exacting standards for sub-supplier qualification
- an outstandingly low failure rate1
- a stable product performance over the entire lifetime
1Failure rate only available for AC transformers in total
Our power system consulting services range from power system studies and field measurements to disturbance investigations.
Testing
From assembly, straight into the test field
Siemens transformers are well-known for their superior first-pass yield. They undergo rigorous testing at Siemens own test facilities before they are shipped to the customer. This approach – along with Siemens signature precision in manufacturing – ensures compliance with guarantee values and a successful operation in the field.
Enough space to test fully-assembled units
Siemens test bays are uncommonly spacious. Why? To ensure reliable performance in their target environment, Siemens engineers rigorously test fully-assembled units in their test bays – even towering giants, such as dual-tank phase shifters.
