Our monitoring brings you savings, safety and sustainability

To make significant savings on energy you don’t necessarily need to overhaul your infrastructure and start again...

Our SLM Smart Building is the building automation system that manages indoor and outdoor spaces with simplicity. Control, comfort, safety, consumption analysis, energy savings and IP solutions are integrated into a single intelligent platform, designed to fit the needs of the building with flexibility. And thanks to power line communication technology, SLM uses the existing electrical wires to transmit data, eliminating the need to install new cables and undertake expensive renovation works. A three-phase point to multi-point self-diagnostic and self-correcting system for optimum reliability.

Preventive maintenance

Measurements of power consumption, water and gas pressure, air quality, engine speeds, vibration and more give an impression of the performance of your appliances and installations. Any deviation from preset values and margins are indications that can be checked. So that maintenance or repair can take place before unexpected failures or downtime occur. Preventive measures based on monitoring prevent high costs and increase safety.

Energy audit without extra costs.

European law requires energy audits for all large companies? These audits had to be carried out before 5 December 2015 and repeated every 4 years. Organizations must have an independent energy audit every 4 years and the cost-effective measures (payback time <5 years) must be implemented. The energy audits must comply with international standards such as ISO 50001 (energy management system). Organizations must therefore have an independent energy audit every 4 years and the cost-effective measures (payback time <5 years) must be implemented. The energy audits must comply with international standards such as ISO 50001 (energy management system). Our monitoring system can meet these conditions in fact a constant audit takes place. The extra 4-yearly audit and the associated costs are no longer necessary.

Prepare for unexpected events

The utilities industry is one of the most important industries in Europe and is considered part of our critical infrastructure. When it comes to essential services such as power, gas, and water, zero downtime is expected. Considering the risks, companies should establish business continuity and disaster recovery practices. Unmonitored and inadequately tested generator backups for instance fail 20 percent to 30 percent of the time. Preparing for power irregularities or extreme weather events must include steps to ensure that backup power will kick in when it’s needed, starting with 24/7 monitoring and robust testing of backup systems. A sound planning approach allows you to prepare for any incident from power loss a natural disaster.

Increase your consumption when prices are low, lower it it when the price is high.

Many equipment, processes and industrial systems can be switched on and off for a short time. Think for example of a freezer room: in many situations it is not a problem to cool the goods a bit further, and with accurate monitoring of the product the temperature can often be a little higher (for a short time) than the set temperature of the freezer room. In the same way, there are also margins in, for example, the temperature of water in a swimming pool, or stored oil in a terminal in the port.

As a result of surpluses and shortages in the energy network, prices for electricity change every 15 minutes. We can convert this flexibility into a lower price for your energy. We Save Power can help you map out where Flex is present in your company and unlock the full Flex-potential. We facilitate fully automatic control of your processes to create the maximum value. At the same time it is always possible to overrule the system.

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Together we effectively reduce your energy bill

Whether industry, hospitality, trade, service or logistics - we support you with the development and implementation of measures that increase the energy efficiency of your operations and conserve resources. In doing so, we address both the technical as well as the economic cost optimization and implement all necessary measures. All of the measures we propose are easy to install and can be implemented immediately.

Step 1: Screening

The screening begins with a load profile analysis. It is well suited to quickly and directly detect conspicuously high power consumption with low investment measures and changes in setting parameters. In the subsequent Bench-marking, we will be mapping specific electricity figures in order to find optimized technology. All we need from you is your electricity consumption from the past year, which you receive from the your energy provider. In addition, the location data such as annual electricity consumption, area information and addresses.

Step 2: on-site inspection

In step 2, the sites are subjected to a detailed inspection and the outcome of step 1 will be discussed in detail. If necessary, corrections of control parameters are already proposed here. In the there after following report, you will find a sound analysis and explanation of the consumption. Weaknesses for electricity and heat as well as concrete measures are pointed out and costs of investments as well as calculated savings.

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SVG Static Var Generator is the new standard in reactive energy compensation. This power electronic current source is the accurate and highly reliable solution for todays networks characterised by significant increase in harmonics, voltage variations caused by intermittent renewable sources connected to the network and voltage level due to the smart grid development. The DSP controlled IGBT topology enables a perfect compensation on each phase for both inductive and capacitive loads. It also correct phase unbalance where necessary. Immune to harmonics, resonance and voltage level, it offers a maintenance free solution reusable in any network configuration.

 

The modular PQC Power Quality Compensation range enables to reach a power factor close to one by correcting at a very affordable cost both the reactive energy and the most dominant harmonics. With the continued installation of power electronic devices such as motor speed control by means of variable frequency drives or electronic ballast for lighting and process controllers, harmonics are a critical concern. Those harmonics can be corrected with a filter integrated in the device by the OEM (this is required for application with an input below 16A per phase).  For higher power, the extra cost for such filtering is generally by far exceeding the cost of an external filter.

 

The AHF Active Harmonic Filters range from WSP is the broadest range of world class filters. From 5A per module in a 19" 1U format easily installed, among others, in data processing environment, to 150A per module widely used in the most demanding industries, the range is characterised by its outstanding correction of the harmonics from the 2nd to the 50th order in a volume smaller than many competitive products. Modular and scalable with the needs, this power electronic current source is the ultimate solution to offer reactive energy compensation, harmonics and phase unbalance correction in a single solution. Unique algorithms secure the absence of resonance with the circuit where it is installed.

 

EVR Electronic voltage optimizers, regulators and conditioners allow commercial enterprises of any size to optimize voltage to match individual facility needs, exactly. Voltage conditioners safely bridge voltage anomalies and ensure maximum uptime and motor life for valuable production equipment, while safely operating on grid voltage. The automatic voltage conditioners provide tightly controlled voltage through both transient and longer-term low or high voltage events, while balancing 3-phase power.


 

 

Oliver EVR and Sag Ride Through, ensures a revolutionary new protection against instable mains supply: The voltage optimization system operates as an online system. It corrects voltage deviations in real time (<1ms) and is easily integratable in industrial surroundings. voltage sags lasting only 17 ms can cause significant production problems, creating operation outages. With Oliver (Online Voltage Regulation) you secure quality and  protection against over- and/or under-voltage up to +/- 40%. Voltage sags are corrected in real-time and the mains voltage is held continuously to the required value. Should deviations from the required voltage occur, counter-measurement sets in within 0.140 ms and the voltage is stabilized back to the specified value within < 5 ms (control setting time).

 

Minos Public Lighting System: Energy savings and CO2-emission reduction in lighting of public areas are todays goal, while security of people and infrastructure remain highly critical. The Minos product range offers realistic opportunities to initiate and upgrade the infrastructure. Powerline technology offers two significant benefits: scalability and signal security. The use of power line transmission enables the Minos System to communicate with each single lighting point exploiting the existing electric line, without adding any new and expensive cable. Thanks to this technology, the system allows to decide in which particular area to operate and in which time to send ON/OFF and flux reduction commands to the lighting points. Moreover we can also get all the information about the status and/or malfunctioning of each lamp.

 

Minos Smart City System: Not just light but a new platform of services ready to be connected. Thanks to its innovative technological solutions, the Minos System turns the outdoor lighting in a new smart grid present on the territory. The street lamp becomes a new support able to integrate and activate a wide range of services to improve the quality of life and make the City more smart, safe and eco sustainable.

 

 

SLM Smart Building Management: With the growing implementation of energy saving devices based on power electronics and the integration of renewable energy production, the SLM21S is a perfect solution to continuously monitor the energy consumption and the power quality of the networks. Centrally in the main cabinet and on any location in the building without the high costs of new cabling.

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Camping and bungalow centres are applications that benefit of the power line communication system from We Save Power.   The constant change of configuration due to arrivals or departures of residents over a relatively wide area forces most tenants to be regularly on their bicycles or golf cart to execute local little start-stop command or read meters.   When the occupancy rate is high it generally requires to hire temporary people just to follow the changes and in the low attendance periods to leave the welcome desk unattended while accompany people to their bungalow.

The solution is easily installed over the existing electrical network whether it feeds the bungalows or the lighting systems.  In the present case the system was installed to provide a remote electricity control for both the bungalows and the sockets available for camping cars.  It also provides an automatic start of local heaters in the bungalows when freezing temperatures can have a damaging impact on the water pipes.  It also enables the owner to read the online consumption of electricity and water and avoid the costs related to inattention.  With the installed powerline system the manager can reduce the necessary resources to manage the camping and concentrate more of his time to meet the numerous demands of his visitors.

The narrowband system can be upgraded to any monitoring and control such as lighting but also superposed with a broadband transmission to add video cameras, dynamic billboard or offer WiFi connections.

Public lighting and private parking lighting are one of the opportunities to make substatial savings.   While most people think that the solution requires a high investments in new led based luminaires,  solutions, improved over the last two decades, already exists. Solutions that can be easily and cost effectively installed, even on traditional HPS lamps.

The city of Rixheim in Alsace implemented the Minos lighting system to control the intensity of light based on the actual traffic.  The objective is of course to provide the expected road security in line with the normative standards at the optimised energy cost. The system is based on the installation of one optical traffic sensor and a controller in each 120W led luminaire, communicating to the distribution cabinet by power line communication.  The cabinet is linked over internet to the central Minos application.  The information collected from the sensor and added to any additional information such as the time of the day can be treated to command the intensity of light.

Moreover, to the direct savings on electrical energy, the system enables to monitor on line the operation of the lamps, prolong their lifetime and their intensity and reduce the maintenance cost. The installed system can be scaled up to add applications in the future.

 

Rue de Mulhouse in Rixheim. Source: Google

A large regional hospital in upstate New York needed to protect mission-critical equipment and processes. The hospital outlined a number of challenges it faced in its efforts to preserve and protect its medical imaging equipment and, more importantly, the integrity of the resulting medical images.

Medical imaging equipment is, by nature, sensitive equipment. For one, it requires a sizeable inrush of high-impulse currents during use. At the same time, the voltage feeding must be controlled within very narrow specifications (typically 2% of connected line voltage during peak inrush) in order to keep the high voltage components functioning properly. Last, but not least, medical imaging equipment must be noise-free (less than 0.5 volts neutral to ground) and disruption-free during utility voltage sags to avoid impacting image quality and patient diagnosis.

Solution

An electronic voltage regulator/power conditioners provides the hospital with the broadest range of protection against voltage fluctuations, as well as the proper overload capacity for its inrush-current requirements. At the same time, it provides consistent voltage regulation and fast correction without maintenance or moving parts.The EVR is not only providing the facility’s imaging equipment with reliable voltage regulation, it’s also eliminating the noise artifacts that can wreak havoc on medical images and the critical patient diagnoses made from those images. The EVR is prolonging the hospital’s imaging equipment life and reducing machine downtime, as well, ensuring that the hospital’s equipment is running at all times to keep pace with the hospital’s heavy scheduling requirements.

Results

The hospital has had zero power-quality issues since installing the EVR. That has made a very positive impression on both the facilities and imaging staffs.

The battle between wireless and wire line monitoring and control systems continues to rise while we believe the solution is most likely a combination of both.

Wireless technologies is a hype while wire line is offering significant benefits in terms of reliability from both a power and signal security point of view.

Wireless is a cost effective way of transmitting signals for those who do not have access to a cable. Yet the most proven wireless technologies either cellular like GSM, 3G and LTE or fixed like WiMax are tight to licenses, increasing operating costs for non-telecom companies. For management systems, manufacturers offer a number of RF alternatives such as WiFi, Zigbee or EnOcean.  While those technologies are the most attractive for local sensors and actuators, building a wide area network based on short range RF technology is still to be demonstrated.  The most reliable monitoring and control networks are and will most likely remain based on a combination of cabled networks and wireless devices installed at the edge of the cabled network.

From Power Line to Data Line For reasons of cost and payback the construction of a new cable network is often not justifiable. However, one network is available everywhere: the electricity grid. The 'powerline' is an attractive technology for the development of monitoring, management and control networks for public spaces and buildings.

From Data Line to Smart Grid The most reliable monitoring and control networks are based on wired networks in combination with short-range wireless modules installed on the edge of the wired network. A generic and scalable platform allows virtually every communication infrastructure for the intelligent measurement, control and management of public spaces and buildings . 

From Smart Grid to Sustainability By using the electricity network to send control signals, you will not only save on the initial costs, but also on operational costs. Smart management brings the energy consumption and CO2 emissions down. We Save Power connects, so you can focus on sustainability: less energy and more comfort in a safe working and living environment.

The quality of manufacturing of your capacitor banks are not worse than before, but the environment has changed.

Three continuously growing characteristics of today’s networks have a significant impact on equipment reliability especially on capacitor banks: the supply voltage variation, the supply voltage level and harmonics.  Consequences are briefly discussed below.

Power from intermittent renewable sources

 The massive introduction of power from renewable energy sources, intermittent in nature, in the low and medium voltages network has a significant impact on the voltage variation as illustrated here on the left showing records over 24H. Though the voltage level may be maintained within limits by means of equipment such as tap transformers, one must keep in mind that the reactive energy capacity of a capacitor is proportional to the square of the voltage.  As example if one assumes a bank made of six equal steps of each 17%, one easily calculates that a voltage variation of 8% is equivalent to the obliteration or addition of a complete step. If the actual required reactive power is closed to a round number of steps, one understands how much the voltage variations will significantly increase the number of commutations even when the reactive load is constant. This growth of repetitive commutations will shorten the lifetime of the switches, recognised as the major failure with regular replacement as witnessed by several users.   

  Distributed sources with bidirectional power flow

The operation of networks with bi-directional power flow coming from multiple distributed power sources comes with an increase of the average voltage level of medium and low voltage networks as shown in multiple studies.  Capacitor banks specifications integrate the voltage tolerance and thus are not directly destroyed by this change.  However as illustrated in the figure nearby, the lifetime of a film capacitor is in the power 5 to 7 of the voltage level.  In other words, an increase of ten percent of the voltage will reduce the lifetime by 38% to 51% depending on the manufacturer. Consequently, companies connected to the medium and low voltage network should expect an acceleration of the maintenance and replacement of their capacitor banks and should consider the actual conditions of their application. 

Picture Source: CERN R.Gallay. http://cds.cern.ch/record/2038610 

The growth of energy savings equipment

The last major trend of network pollution relates to the exponential growth of energy savings equipment based on switch mode power electronics such as variable frequency drivers, computers, rectifiers and electronic ballasts.  All those equipment (more or less equipped with filters and consequently of variable costs) produce high levels of harmonics by nature of the technology used.   These harmonics can produce failures such as the one observed after five months in a textile factory in the picture nearby. Nowadays the problem is well identified and capacitor banks are equipped with detuning reactors.  However, the latest remain mitigation solutions slowing down the ageing process.  Further, the ratio of harmonic producing loads continue to grow. When those are above 40% of the load, active harmonic filters should be considered.   When the load is powered by a local generator, power quality correction must be implemented for much lower levels as the generator may not be able to start when its operation is critical for the business.

Reactive energy generators are the most advanced technology for reactive power compensation and the logical alternative for capacitor banks.  Beside their incomparable performance and competitive cost they are immune to harmonics.  Yet some applications require to suppress harmonics not only to protect capacitor banks.

Cranes and hoists used in port wharfs are very good examples of such applications. Their usage is intermittent and create very high variations in current.  Their drivers are consequently producing high content of harmonics while at the same time the displacement factor (cos phi) needs to be corrected. 

A typical example is given herewith. 

This dock in one of the world's major ports is equipped with six cranes, each subject to very high current fluctuation between 100A and 1600A. As shown in figure 1 we measured an average power factor of 0.6.  To cope with the rate of change, capacitor banks would have to be based on thyristor switch and because of the harmonic content their life cycle would be greatly reduced, even in the presence of detuning filters.  It is thus required to design either specific passive filters or to use active filters, while taking the greatest attention to avoid resonance. 

 The optimal solution is to combine a reactive energy generator (SVG) with an active harmonic filter (AHF).  The SVG is immune to harmonics and the AHF will autocorrect itself to avoid any resonance with the circuit.  There is no need for detailed engineering of the circuit.  The value of reactive and harmonic currents that need to be compensated are enough to dimension a highly performant safe and reliable system.   Moreover, the modular construction of the system can be scaled to changing needs or reconfigured for new applications at any time.

In our example, the customer selected to compensate all even harmonics up to the 11th and leave the others uncorrected.  The result is shown in figure 2, where the impact of the corrective system is demonstrated by the change of the average power factor from 0.6 to 0.95.

Fig1: Cranes and moving bridge are characterised by
high currents with sudden variations

Fig2: Improvement of PF

We Save Power BV
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Managing director: Jac van Megen
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Challenges and opportunities in a rapidly changing energy landscape

A reliable, economically competitive and environmentally sustainable electricity system is the cornerstone of a modern society. The Fourth Industrial Revolution builds on the digital revolution and combines multiple technologies that are leading to unprecedented paradigm shifts in the economy, business, society, and for individuals. It involves the transformation of entire systems. The electricity landscape is a prime example of the Fourth Industrial Revolution as it undergoes transformation, becoming more complex than ever before, with rapidly evolving technologies, emerging innovative business models and shifting regulatory landscapes.

Although necessary and promising, three major changes (renewable energy, decentralization and the large-scale use of power electronics) bring new challenges for the industry. New phenomena are introduced into voltage and current which, if left unchecked, have major consequences for safety, wear, continuity, quality and costs of industrial processes. Costs that can rise to 4% of the annual turnover according to independent European research.

Introduction of renewable energy

Decentralization of energy production

Explosive growth of energy-saving power
electronics


We optimize and manage your Power to reduce energy consumption and save costs

Our focus and our systematic approach are to promote the use of energy and to maintain the process and installation technology in buildings and industry. Various objectives such as investments, operating costs, cost efficiency and energy efficiency are examined and evaluated. This in turn leads to an optimal implementation strategy. This leads to safety for people and machines, prevents breakdowns and interruption of your processes, increases the quality of your production and above all saves you a lot of costs and annoyance.

Power Analysis & Savings
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Power Quality & Safety
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Power Management & Continuity
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How we help our customers through open consultation and mutual trust

We like to see ourselves as sparring partners who are open at any time and for every question from our customers. We are not magicians who just shake up an answer. Intensive cooperation, mutual involvement and knowledge sharing of highly specialized teams at both the customer and with us work step by step towards the optimal quality, safety and sustainability of industrial processes.

Solution Optimization
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Power Optimization
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Process Optimization
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Top 3 most viewed products

Modular active harmonic filters
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