We continuously develop our awareness and yours. 

From a user perspective, electricity is the most attractive energy. Once the infrastructure is installed it can be used like tap water, which is available whenever we need it. Electricity offers two major additional benefits. The network can be used for electronic communication over the power lines and you can add and benefit from your own source of energy to use, to store or to sell. Unfortunately, like tap water, your electricity may not be "pure" with disastrous consequences on your processes, equipment and thus your cost of doing business. We follow the three major trends which influence the optimal usage of electricity now and in the future.

The rapid evolution of electrical networks

The growth of energy savings equipment

The electricity market opening

 

The Rapid evolution of electrical networks

Till the nineties, the electricity network was a one direction stream over long distances from major energy generators producing power at high voltage (let us say 400kV) to consumers loads at low voltage (400V) or medium voltage (11kV). The consumption is in nature variable but forecast usage of main users and statistical analysis of small users enabled operators to support the needs with a good quality of electricity. The growth of applications and the introduction of renewable energy has changed the game. More electricity is produced locally (regionally) to be consumed locally, requiring networks to be "bidirectional". Unfortunately, the source is in nature intermittent. Consumers become prosumers and we introduce loads such as electrical vehicles. Those continuous and sudden variations introduce major challenges for operators to maintain voltage within the limits. Many equipment will be operating above the nominal and that will accelerate their ageing and thus reduce their lifetime. On the other side, lowering the nominal voltage increases the influence of voltage dips with as a possible consequence the shut-down of control equipment. Top

The growth of energy savings equipment

Electronic ballasts, variable frequency drives, rectifiers and power supplies are power electronics equipment based on the principle to rectify the energy coming from the mains by letting the mains current to flow only during a limited portion of a cycle. It results in non-linear currents which have a negative impact on your equipment and processes. For equipment using less than 16A input current, the manufacturers are requested to comply to the European norm EN 61000-3-2 and in many cases (not all) it does not require more attention. The standard EN 61000-3-12 describes limits for equipment using an input current from 16A to 75A, but in such case the limits depend on the actual application. Above 75A, nothing is required but to comply with a limited injection of non-linear voltage in the public grid. Unfortunately, most equipment suppliers are not able or willing to inform you about the impact of their equipment on your other applications.Top

The opening of the electricity market

In recent years, we all have seen the opportunity to buy electricity from multiple suppliers. Heavy industrial consumers, directly connected to the high voltage network (also called transmission network}, already enjoy a great flexibility of the tariffs depending on the time of the day and the time of the year. Further they can also accept to reduce the power consumption during a certain amount of time and sell their capacity to others. The European Union has requested every member state to extent such opportunities to all consumers, starting of course with the industrial companies connected to the medium voltage network. While the opportunities are under discussion and not effective yet in most European regions, enterprises should prepare themselves by having a good understanding of their load profile over time. It will help them to immediately reduce their bills through a better control of the power demand and understand when and where they will be able to adapt their processes to use the electricity at the best tariff or sell their capacity. Top

What are the characteristics of your electrical network?

Do you know the quality and content of electricity and how it may affect safety and the lifetime of your equipment? Electrical “impurities” may not be visible. Therefore, they deserve regular measurements to avoid penalties or business discontinuities.

Whether you plan to install power quality equipment or you are looking for smart public space solutions or building management systems, we shall share with you a common understanding of the quality of your network and present our solutions where effectively applicable.

We Save Power offers power site audits. A power quality engineer visits your site and conducts a power quality audit of your electrical system. This involves setting up sophisticated measurement equipment on site that monitors and records all the electrical activities that occurred in the system over a period. An analysis of the recorded data helps to reveal any harmful harmonics, voltage supply and cos phi issues, load variations, unbalance, noise or transients. Our power quality engineer will analyze the data and present you a power quality report, outlining the observed issues and suggesting solutions if required.

Even correctly functioning power systems require routine auditing to ensure early identification of any potential issues and proactive servicing requirements to keep power equipment operating to its full potential. A correct functioning system may save you up to 30% off your power bill. Moreover, by running an efficient electrical system you use less energy and therefore help the environment.

Measurement services

Results analysis and data supported advices

Low cost permanent site measurement system

 

Save by improving your processes efficiency.

Power efficiency is often confused with power optimization. Although both will lead to savings, they do mean different solutions. Efficiency is the ratio of the power at the output of a system to the power at the input of the same system, while power optimization is to reduce the input power to align it with the real needs. Since the year 2000, manufacturers have designed components and systems that are more efficient. The most popular is Led. Reactive and harmonic currents are the two major root causes of inefficient electrical systems. Typical electrical design of transformers and cables includes safety margins. While those are recommended to take network extension into account, it might not be adequate to use the extra capacity or a significant part of it for useless currents. Beside many other benefits of limiting reactive and harmonic currents, reactive energy generators or harmonic filters will improve the efficiency of your network and increase the available capacity.     

A second opportunity to improve efficiency is to consider your premises as a global system and to install the necessary monitoring and controls. Most of your systems are equipped with smart controllers which optimize the performance of an individual system. Yet, systems are inter-related and subject to human interaction. Savings justify the adoption of a building management system. The challenge is that those systems come often with high initial costs and consequently a long and sophisticated design process. We Save Power solves this problem by offering you a management system without infrastructure costs or radio. Based on mastered power line communication, the solution comes with very low initial costs, is highly scalable and reconfigurable. Consequently, it will enable you to measure and control any energy burning equipment without long engineering studies and high capital expenditure. 

Reactive energy generator: Perfect cos Phi and balanced network for the worse electrical loads

Active Harmonic Filters
User friendly and cheaper than you think

Site management system
Nor radio, neither infrastructure cost

Save by optimizing your input power.

Power optimization is the processes to control the input power that will be aligned with the power that you use. You will consequently make savings on your energy bill. We Save Power offers three major solutions to power optimization.

The first opportunity is to secure the power quality of your network. This must be considered in all cases. Reactive energy costs may be added to your bill and in any case, reduce the capacity of your transformers and cable system. Harmonics of order 3n+2 (i.e. 5th harmonic, characteristic of many variable frequency drivers) will try to make your induction motor to turn in the opposite angle of what is expected creating a counter force in the stator.

The second opportunity is to control your voltage and in some cases to reduce it within the nominal range. Renewable energy sources with their rapid changes due to changing weather conditions and the growth of highly variable loads are driving a significant increase of voltage variations and often an average voltage value above nominal. Generally speaking, equipment lifetime will reduce with the voltage increase. On the other hand equipment may fail when the voltage is too low. A good quality voltage conditioner to correct both over and under voltage offers great opportunities of power optimization. 

The third opportunity of savings through power optimization is to use smart and easy implementable control systems such as Minos for public street lighting and Simple life for building and site management to dim lighting or control room temperature in function of the occupancy.  

Secure the good power quality of your network
Reactive energy generator 
Active harmonic filters

Master your voltage
Single phase local voltage conditioners
Three Phase central voltage conditioners 

Control your power
Lamp dimming

 

Save on maintenance, replacement costs and process control

New installed energy sources and power electronic equipment have generally deteriorated the power quality of your network. While it may not be directly visible some signs may alert you. Let us give some few examples from our daily life.  

  • A breaker opens and the electronic equipment beyond the breaker stops. The breaker opened because of the occurrence of an unexpected harmonic current from equipment nearby.  
  • Harmonics accelerate the ageing of the capacitors. Capacitor banks capacities reduce constantly and fail more frequently. 
  • The DSO (Distribution Service Operator) has lowered the average mains voltage. While it stays within the tolerance most of the time, voltage dips are now regularly below the lower limit of most electronic control equipment. 
  • The mains went off but the generator did not start, causing a major business disruption and cost. The capacitive reactive energy from the cumulated loads was too high. 
  • Electrical motors make more noise than usual. The noise is the result of harmonics on the stator.

These examples are visible but non-power quality affects your equipment insidiously reducing their lifetime and increase your maintenance costs. As your business infrastructure and its electrical environment are constantly changing, you should regularly analyze your power quality, discuss the results and bring simple remedies when necessary.

Reactive energy generators
Replace your capacitor banks (see comparison)
Reduce your electricity bills
Secure the operation of your generator

Voltage regulators and Sag Fighters
No dips, no maintenance, no costs

 

Active harmonic filters
Reduce the risk of process disruption 

Save on controlling your loads

Saving on load management comes from your control of the energy bills today and will open great opportunities for tomorrow.  The content of the invoices depends on how you are connected to the network.  For customers connected to the medium voltage through a dedicated transformer or to a shared (MV/LV) transformer through a dedicated line, their bills include three major topic related to their consumption.

  • The active energy (kWH): the actual energy required to operate your equipment
  • The reactive energy (kVAR): this useless energy is typically billed when it exceeds 33% or 40% of your active energy. 
  • The quarter peak power: the last 12 months maximum power averaged over 15 minutes

Would not it be better than you actually master those three components rather than regret to pay for what you could have avoided.   if you have already taken measures for the two lasts part, the "near" future will offer you great opportunities on the first.  Indeed, the demand side management already applicable to high voltage networks will be extended to the other networks.  It will offer the opportunity to shift loads to the best tariffs or to resell load capacity. To do this effectively one needs to understand the consumption over time, analyse the opportunities to amend the business processes to offer a greater flexibility and test the models.

Reactive energy generators
Replace your capacitor banks (see comparison)
Reduce your electricity bills
Secure the operation of your generator

Voltage regulators and Sag Fighters
No dips, no maintenance, no costs

 

Active harmonic filters
Reduce the risk of process disruption