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Modular design with efficiency proven by control algorithms
At the heart of our Merus® SVC sits a Merus® Thyristor Valve, used in Thyristor controlled Reactors (TCR) for dynamic control of reactive power. Merus® Thyristor Valve was developed to meet the highest requirements for compactness, performance, and reliability in harsh industrial environments. Thanks to the modern composite construction, the valve is compact enough to be installed even into a standard sea freight container, enabling relocatable static var compensator designs.
Merus® SVC systems can be built for all medium voltage levels starting from 3.3 kV all the way up to 38.5 kV. Power output ranges from 4 MVAr to 250 MVAr. The devices can be connected in parallel for a higher total output and added redundancy. Each Merus® SVC system is tailor-made to fit the network fault level and load parameters. Open- and closed-loop control strategies permit effective flicker mitigation, reactive power control, power factor control and harmonic mitigation. The thyristor valves in Merus® SVC are equipped with Merus® Control & Protection System that utilizes proven control algorithms.
Static Var Compensators built with thyristor-based power electronics technology have been in use since the 1970s. They continue being installed in demanding applications, such as Electric Arc Furnaces, mining plants, and transmission and distribution networks. High reliability and availability are required from these installations, as they play an extremely vital role in eliminating flicker, reducing voltage variation and increasing productivity in industrial facilities, and extending transmission and distribution capacity in the electrical networks of utilities.
Keeping an aging SVC up and running can be a challenge for several reasons, including the shorter lifetime of active components versus passive components. The manufacturer’s specific electronic control components may have become obsolete, and the electrical characteristics of new spare thyristors must be closely matched with the other thyristors in the valves. Thus, the reliable long-term operation of an aging SVC system can be compromised leading to operational or safety risks.
We are experts at helping our customers migrate their already existing compensation systems to new technology while fully utilizing their existing CAPEX investment.
Why modernize existing SVC?
Typically original SVC suppliers do not have old electronics in stock or personnel to support 20 – 30-year-old technology in more complex trouble shooting cases
Based on our experience, in most cases the best way is to modernise only the active components
Reduces CAPEX cost
Faster delivery time
Installation and commissioning time 2-3 weeks can be done during plant’s annual maintenance break
In case plant capacity is increased or grid code has become stricter Merus can offer
Complete new SVC or conversion to STATCOM
Help customer study new EAF operation points with Merus technology
On top of economical advantages, modernizing increases sustainability
In a typical case the passive parts have still lifetime left when the active parts become obsolete
Replacing only the active parts allows that the lifetime of the passive parts is fully utilised, increasing the sustainability
Risks of sudden SVC failure
Typical delivery times for new SVCs due to an unplanned SVC failure are 12-16 months
In case of a sudden failure, customer is in disadvantageous position towards SVC suppliers
If an unplanned failure happens, that typically means lengthy discussions with the utility on how operation can continue while the compensator is being repaired
Steel Industry risks
Sudden loss of the SVC typically leads to a 10-20% production capacity drop
This will also cause energy consumption per ton to increase typically by 5-7%
Energy consumption increase means CO2 emissions (depends on fuel mix)
Electrode and interior coating consumption increase as well (typically 0.15-0.18kg/ton)
Less efficient operation and problems caused by harmonics will typically increase OPEX costs immediately by 5-10%
Utility companies could mandate even higher production decrease due to adverse effects to their grid
Reactive power penalties increase
Rolling Mills risks
Sudden loss of the SVC will lead to more severe voltage fluctuations at the factory electric system
This can lead to nuisance tripping causing production stoppages
Maximum torque of DOL motors will be reduced meaning negative effects to rolling mill operation
The plant may use its grid code compliance meaning penalties from the utility
Reactive power penalties increase
Mining Industry risks
If the mine has diesel generators or gas turbines their fuel consumption will increase if the SVC is not in operation
This will also increase CO2 emissions
The maximum torque of DOL motors will decrease which affects adversely the mining process
Risks of Other Heavy Industrial Loads
Other heavy industrial loads get similar benefits from a well-working SVC.
Buying from us
At Merus Power, we guide you effortlessly through complexities, ensuring you find the ideal modernization solution that meets your needs. No prior knowledge needed—our expertise is at your service.
Step 1 – Assessment and analyses
The process begins with an on-site inspection of the existing SVC, followed by a detailed analysis of the customer’s objectives, including system operation, performance needs, and future plans. As experts in designing complex compensator systems, we offer insights on how these enhance productivity, such as in EAFs, positioning us uniquely to create solutions with significant ROI.
Step 2 – Project specifications and budgetary estimates
Our specialists will choose the appropriate technology by comparing various options to match the customer’s performance expectations and budget. Key considerations include process improvements, lifetime and reliability requirements, and technical constraints that affect system design.
Step 3 – Design and system configuration
After developing preliminary designs and budget estimates, and the customer is ready to move forward with the investment, we finalize the investment case and main design specifications. The result is a custom-built business model that exemplifies true collaboration, developed in partnership with the customer.
Step 4 – Implementation and commissioning
Once a project begins, our design team collaborates with the customer’s engineers to integrate our modernization solutions smoothly with existing systems. Procurement and manufacturing are then efficiently executed to ensure timely readiness. The final stages involve installation and commissioning at the customer’s facility, coordinated with the plant’s regular annual maintenance to minimize disruptions.
Step 5 – Training and transitioning to Merus® O&M Service
We prioritize effective training and thorough maintenance to enhance the longevity and efficiency of our systems. Our comprehensive training program equips our customers’ teams with the skills needed for daily operations and system maintenance. Additionally, we offer a tailored multi-year operation and maintenance agreement to ensure long-term reliability and optimal performance of the modernized SVC system. Our proactive maintenance includes our cloud-based IoT service, Merus® MERUSCOPE™, to ensure consistent, high-quality performance.
