SIEMENS SHUNT REACTORS AND SERIES REACTORS

Shunt reactors and series reactors are used widely in AC networks to limit overvoltage or shortcut current in power transmission. With a growing number of high-voltage overhead lines in a fast-changing energy environment, both shunt and series reactors play a key role in stabilizing network systems and in increasing grid efficiency.   Range: series reactors, variable and fixed shunt reactors Rated power: from ≤10MVAr to 300MVAr Rated voltage: from 33kV to 800kV Features: compact, robust design; stable performance over service life; 3ph testing up to highest voltage and power levels; state-of-the-art technology and design tools Optional features: low-noise/low-loss version, extended 80%-regulation range, green design options

Reactors are real all-rounders and grid trouble-shooters. In conventional electricity transmission grids shunt reactors control voltage and compensate reactive power, while series reactors change load flow and limit short-circuit currents. With the increase of renewable and distributed power generation reactors – and variable shunt reactors in particular – play a significant role in today’s energy landscape with its higher fluctuation in power feed-in. Siemens’ reactors come with benefits at various levels to help grid operators achieve and maintain a reliable and secure power supply system:

Shunt Reactors & Series Reactors Measuring reliability

Siemens’ reactors work reliably for decades in high-voltage grids worldwide.

The high number of units in service – more than 800 units manufactured over the last decade alone – serves as proof of the validity of our design laws. In our effort to ensure long and reliable service life, we strive for minimum tolerances in manufacturing and insist on high-quality materials. Our suppliers worldwide are required to comply with the high standards, to which we hold ourselves. The result is a failure rate that is nothing short of impressive – we’ll gladly provide you with our latest mean time between failures (MTBF) figures.

MTBF¹⁾ of Siemens shunt reactors

Number of units:                        820

Total service years:                     4,361

Number of failures:                    5

External failure rate:                  0.115 %

Meantime between failure:      872 years

1. 2004-2013 evaluated

Our systematic approach to quality supports our relentless pursuit of precision and customer satisfaction. It rests on three pillars:

Compliant with highest standards

The highest quality standards govern all processes – from reactor design to manufacturing and testing – at all our sites. Each of our manufacturing sites has been certified to ISO 9001 and holds additional local certifications. The reactors manufactured meet all required standards, from IEC to ANSI and IEEE.

Demanding supply-chain management

Siemens uses tried-and-tested technologies for windings, insulation, tank, monitoring devices, connection equipment, and the tap changer, sourced from rigorously screened suppliers. The sub-supplier qualification system – independent of region or site – sets the same high quality standards, to which we hold ourselves.

Quality control, inspections and testing

Every manufacturing step is subject to quality control, rounded off by a final inspection and an acceptance test in the high-voltage test bay of the respective manufacturing site. In addition, we can conduct special tests upon request. We invite customers at regular intervals to attend tests and inspections to give them the opportunity to personally ascertain the quality of the manufactured reactor.

Siemens reactors are manufactured at state-of-the-art facilities

• Air cushion throughout manufacturing
• Hydraulic lifting arrangement for core assembly
• Two fully-equipped test fields to prevent bottlenecks
• Large capacitor bank to test shunt reactors up to 250 MVAr

Best-in-class processes

Constant pressure of the winding during drying process increases short-circuit capability.

Oil impregnation after drying reduces humidity in the windings.

“Desert Climate Hall” for final assembly after drying ensures long insulation life.

Siemens Transmission Products – Leader in innovations with comprehensive, connective and sustainable portfolio

Transmission products play a vital role in the energy value chain. Siemens Transmission Products provides all key elements including power transformers and distribution transformers as well as gas-insulated and air-insulated switchgear and components. Products are offered individually, bundled or with related engineering upgrade to systems. Our products offer low life cycle costs with maximum availability, highest efficiency and short commissioning times.