Intrusive advertising on the Internet and even on state television channels through a teleshop persistently offers the population a device for saving electricity in the form of “new products” from the electronics industry. Pensioners receive a 50% discount on the total cost.
“Saving Box” is the name of one of the proposed devices. They have already been written about in the article. It's time to continue the topic using the example of a specific model, explaining in more detail:
what is reactance;
how active and reactive power is created;
how reactive power compensation is carried out;
on what basis do reactive power compensators and energy saving devices work.
People who buy such a device receive a package in the mail with a beautiful box. Inside there is an elegant plastic case with two LEDs on the front side and a plug for installation in a socket on the back.
A miracle device for saving energy (click on the picture to enlarge):
The attached photograph shows the characteristics declared by the manufacturer: 15,000 W at a network voltage of 90 to 250 V. Let us evaluate them from the point of view of a practicing electrician using the formulas given under the pictures.
At the lowest specified voltage, such a device should pass a current of 166.67 A through itself, and at 250 V - 60 A. Let us compare the calculations obtained with the loads of alternating voltage welding machines.
The welding current for steel electrodes with a diameter of 5 mm is 150÷220 amperes, and for a thickness of 1.6 mm, 35÷60 A is sufficient. These recommendations can be found in any electric welder’s reference book.
Remember the weight and dimensions of a welding machine that welds with 5 mm electrodes. Compare them to a plastic box the size of a mobile phone charger. Think about why 5 mm steel electrodes melt from a current of 150 A, but the plug contacts of this “device” and all the wiring in the apartment remain intact?
To understand the reason for this discrepancy, I had to open the case, showing the “insides” of the electronics. In addition to the board for illuminating the LEDs and the fuse, there is another plastic box for props.
Attention! This scheme does not have a device for saving energy or compensating it.
Is it really a hoax? Let's try to figure it out using the basics of electrical engineering and existing industrial power compensators operating at energy enterprises.
Electrical supply principles
Let's consider a typical diagram for connecting electricity consumers to an alternating voltage generator, as a small analogue of an apartment's power supply network. For clarity, its characteristics of inductance, capacitance and active load are shown, and. We will assume that they operate in a steady state when a current of the same magnitude I passes through the entire circuit.
Electrical diagram (click on the picture to enlarge):
Here the energy of the generator with voltage U will be distributed by its components into:
inductor winding UL;
capacitor plates UC;
active resistance of heating element UR.
If we represent the quantities under consideration in vector form and perform their geometric addition in the polar coordinate system, we obtain an ordinary voltage triangle in which the magnitude of the active component UR coincides in direction with the current vector.
UX is formed by adding the voltage drops across the inductor winding UL and the capacitor plates UC. Moreover, this action takes into account their direction.
As a result, it turned out that the generator voltage vector U is deviated from the direction of current I by an angle φ.
Please note again that the current in circuit I does not change, it is the same in all sections. Therefore, we divide the components of the voltage triangle by the value I. Based on Ohm’s law, we obtain a resistance triangle.
The total resistance of inductance XL and capacitance XC is usually called the term “reactance” X. The total resistance of our circuit Z applied to the generator terminals consists of the sum of the active resistance of the heating element R and the reactive value X.
Let's perform another action - multiplying the vectors of the voltage triangle by I. As a result of the transformations, a power triangle is formed. Active and it creates the full applied value. The total energy supplied by the generator S is spent on active P and reactive Q components.
The active part is consumed by consumers, and the reactive part is released during magnetic and electrical transformations. Capacitive and inductive powers are not used by consumers, but they load the conductors with generators.
Attention! In all 3 right triangles, the proportions between the sides are maintained, and the angle φ does not change.
Now we will understand how reactive energy manifests itself and why household meters did not take it into account.
What is reactive power compensation in industry?
In the energy sector of the country, and more precisely, of the countries of the entire continent, a huge number of generators are engaged in the production of electricity. Among them there are both simple home-made designs of enthusiastic craftsmen and the most powerful industrial installations of hydroelectric power stations and nuclear power plants.
All their energy is summed up, transformed and distributed to the end consumer via sophisticated technologies and transport routes over vast distances. With this method of transmission, electric current passes through a large number of inductances in the form of windings of transformers/autotransformers, reactors, suppressors and other devices that create an inductive load.
Overhead wires, and especially cables, create a capacitive component in the circuit. Its value is added by various capacitor units. The metal of the wires through which current flows has active resistance.
Thus, the most complex energy system can be simplified to the circuit we considered from a generator, inductance, active load and capacitance. Only it still needs to be combined into three phases.
The task of the energy sector is to provide consumers with high-quality electricity. In relation to the final object, this means supplying electricity to the input panel with a voltage of 220/380 V, a frequency of 50 Hz with the absence of interference and reactive components. All deviations of these values are limited by GOST requirements.
In this case, the consumer is not interested in the reactive component Q, which creates additional losses, but in receiving active power P, which performs useful work. To characterize the quality of electricity, the dimensionless ratio P to the applied energy S is used, for which the cosine of the angle φ is used. Active power P is taken into account by all household electric meters.
Electric power compensation devices normalize electricity for distribution between consumers and reduce reactive components to normal. At the same time, “alignment” of phase sinusoids is also carried out, in which frequency interference is removed, the consequences of transient processes when switching circuits are smoothed out, and the frequency is normalized.
Industrial reactive power compensators are installed after the inputs of transformer substations in front of distribution devices: the full power of the electrical installation is passed through them. As an example, see a fragment of a single-line electrical diagram of a substation in a 10 kV network, where the compensator receives currents from the AT and only after processing it does the electricity flow further, and the load on energy sources and connecting wires is reduced.
Let's return for a moment to the Saving Box device and ask the question: how can it compensate for power when located in the final outlet, and not at the entrance to the apartment in front of the meter?
Look at the photo how impressive industrial expansion joints look. They can be created and operate on different element bases. Their functions:
smooth regulation of the reactive component with high-speed unloading of equipment from power flows and reducing energy losses;
voltage stabilization;
increasing the dynamic and statistical stability of the circuit.
Fulfilling these tasks ensures reliable power supply and reduces costs for the design of current conductors by normalizing temperature conditions.
What is reactive power compensation in an apartment?
Electrical appliances in the home electrical network also have inductive, capacitive and active resistance. For them, all the relationships of the triangles discussed above, in which reactive components are present, are valid.
You just need to understand that they are created when a current (counted by the meter, by the way) passes through a load already connected to the network. The generated inductive and capacitive voltages create corresponding reactive components of power in the same apartment and additionally load the electrical wiring.
Their value is not taken into account by the old induction counter. But individual static accounting models are capable of recording it. This allows you to more accurately analyze the situation with current loads and thermal effects on insulation when operating a large number of electric motors. The capacitive voltage created by household appliances is very small, as is its reactive energy, and meters often do not show it.
Compensation for the reactive component in this case consists of connecting capacitor units that “dampen” the inductive power. They must be connected only at the right moment for a certain period of time and have their own switching contacts.
Such reactive power compensators have significant dimensions and are more suitable for production purposes; they often work with an automation kit. They do not reduce active power consumption in any way and cannot reduce electricity bills.
Conclusion
The capabilities and technical characteristics of “Saving Box” declared by the manufacturer do not correspond to reality and are used for advertising based on deception.
It is high time for the Consumer Rights Protection Society and law enforcement agencies to take measures to stop sales of low-quality products in the country, at least through government information channels.
Memo for managers selling electrical equipment.
Section: Reactive power compensation devices. Basic concepts.
1. What is reactive power?
This is conditionally part of the total power required to operate an inductive load in consumer networks: asynchronous electric motors, transformers, etc.
2. What is the indicator of reactive power consumption?
An indicator of reactive power consumption is the power factor - Cos φ.
Cos φ decreases when the load's reactive power consumption increases. Therefore, it is necessary to strive to increase Cos φ, because low Cos φ leads to overloading of transformers, heating of wires and cables and other problems in the operation of consumer electrical networks.
3. What is reactive power compensation?
This is compensation for reactive power deficiency (or simply compensation for reactive power) in the network, which is typical for low Cos φ.
4. What is a reactive power compensation device (RPC)?
A device that compensates for the consumer's reactive power deficiency.
5. What reactive power compensation devices (RPC) are used?
The most common compensation devices are devices using special (cosine) capacitors - capacitor units and capacitor banks.
6. What is a capacitor unit and a capacitor bank?
Capacitor installation - an installation consisting of capacitors and auxiliary equipment - switches, disconnectors, regulators, fuses, etc. (Fig.1).
A capacitor bank is a group of single capacitors electrically connected to each other (Fig. 2).
7. What is a filter - compensating unit (FKU)?
This is a capacitor installation in which the capacitors are protected from harmonic currents by special (filter) chokes (Fig. 3).
8. What are harmonics?
This is current and voltage having a frequency different from the mains frequency of 50 Hz.
9. What harmonics are capacitors protected from?
From odd harmonics relative to the frequency of 50 Hz (3,5,7,11, etc.). For example:
Harmonic No. 3: 3 x 50 Hz = 150 Hz.
Harmonic No. 5: 5 x 50 Hz = 250 Hz.
Harmonic No. 7: 7 x 50 Hz = 350 Hz...etc.
10. Why is it necessary to protect capacitors in PKU?
Conventional cosine capacitors used for compensation are heated by harmonic current to a temperature unacceptable for normal operation; At the same time, their service life is greatly reduced and they quickly fail.
11. What is a power harmonic filter?
This is an installation used to filter (reduce the level) of harmonics in the network (Fig. 4). It consists of capacitors and inductors (reactors) tuned to a specific harmonic (see above).
12. How does a PKU differ from a harmonic filter?
FKU is used to compensate reactive power; capacitors and inductances (chokes) are selected in such a way that harmonic currents do not pass through the capacitors. In harmonic filters, it’s the other way around: capacitors and inductors (reactors) are selected so that harmonic currents pass (short circuit) through the capacitors, so the overall level of harmonics in the network is reduced and the quality of power is improved.
13. Does this mean that the capacitors in the harmonic filters heat up - because harmonic currents pass through them?
Yes, but harmonic filters use capacitors specifically designed for this purpose, designed for high currents, for example, oil-filled ones.
14. In what modes do capacitor units operate?
Automatic operating mode - when the capacitor unit is controlled using a regulator (other names: controller, PM regulator).
Manual mode – the condenser unit is controlled manually from the installation control panel.
Static mode - the installation is only turned on and off by a switch, external or built-in, without regulation.
15. What are the main installation parameters?
The main parameters of the UKRM are the power of the installation and the rated (operating) voltage.
16. How is the power and voltage of the UKRM measured?
The power of the UKRM is measured in kVAr - kilovolt ampere reactive.
Voltage is measured in kV - kilovolts.
17. What are these stages of regulation?
All power of automatic or manually controlled UKRM is divided into certain parts - control stages, which are connected by the regulator or manually to the network, depending on the required compensation for the reactive power deficit. For example:
Installation power: 100 kVAr.
Regulation levels: 25+25+25+25 - 4 steps in total.
Therefore, the power can vary in 25 kVAr steps: 25, 50(25+25), 75(25+25+25) and 100(25+25+25+25) kVAr.
18. Who determines how many and what steps are needed?
This is determined by the customer based on the results of a network survey.
19. How to decipher the designation of capacitor units?
The designation of ALL reactive power compensation devices follows almost the same rules:
1. Designation of installation type.
2. Rated voltage, kV.
3. Installation power, kvar.
4. Power of the smallest control stage, kVAr (for regulated UKRM).
5. Climatic design.
20. What is the climatic version and placement category?
Climatic modification - types of climatic modification of machines, instruments and other technical products in accordance with GOST 15150-69. The climatic design, as a rule, is indicated in the last group of symbols for all technical devices, including UKRM.
The letter part indicates the climate zone:
U - temperate climate;
CL - cold climate;
T - tropical climate;
M - maritime moderate-cold climate;
O - general climatic version (except for sea);
OM - general climatic marine design;
B - all-climate design.
The numeric part following the letter indicates the placement category:
1 - outdoors;
2 - under a canopy or indoors, where conditions are the same as outdoors, with the exception of solar radiation;
3 - indoors without artificial regulation of climatic conditions;
4 - indoors with artificial regulation of climatic conditions (ventilation, heating);
5 - in rooms with high humidity, without artificial regulation of climatic conditions.
Thus, U3, for example, means that the installation is intended to operate in a temperate climate, indoors, without artificial regulation of climatic conditions, that is, without heating and ventilation.
21. What are the most common designations for low voltage UKRM?
Examples of notation:
UKM58-0.4-100-25 U3
This is the old designation for UKRM:
UKM58 – Capacitor installation, with power control, automatic;
0.4 – rated voltage, kV;
100 – rated power, kvar;
25 – power of the smallest stage, kvar;
U3 is a product for moderate climates, for placement in a cold room without ventilation.
Another, modern, frequently encountered designation:
KRM-0.4-100-25 U3
RPC – installation of Reactive Power Compensation (or Reactive Power Compensator).
The rest is the same as in the previous example.
22. How are high-voltage installations designated?
The old (and more common) designation for high-voltage installations has its own characteristics.
UKL(or P)56(or 57)-6.3-1350 U3
UKL(P) – capacitor installation, cable entry on the left (L) or right (R);
56 – installation with a disconnector;
57 – installation without a disconnector;
6.3 – rated voltage, kV;
1350 – rated power, kvar.
23. How are capacitor banks designated?
The designation of capacitor banks is based on the same principle:
BSK-110-52000 (or 52) UHL1
BSK – Static Capacitor Battery (Static Capacitor Battery) – meaning that this is an unregulated (static) capacitor bank.
110 – rated voltage, kV;
52000 – rated power, kvar;
Or 52 – rated power, MVAr (megavolt amperes reactive) - 1 MVAr = 1000 kVAr.
UHL1 - work in moderately cold climates, outdoors - regions of the Far North, for example.
24. What does the letter “M” mean in the designation UKRM?
Sometimes in the designation UKRM the letter “M” is found at the end. Most often, it means that the installation is located in a container (module), less often - it is modernized.
25. What is a modular capacitor unit?
An installation consisting of capacitor modules - structurally and functionally complete blocks (Fig. 5).
26. Are there any fundamental differences in the design of the UKRM from different manufacturers?
There are no fundamental differences in the design of low voltage UKRM with electromechanical contactors (the most common).
The same can be said about high-voltage installations - controlled and static, as well as capacitor batteries.
27. Are there any fundamental differences in the configuration of the UKRM from different manufacturers?
Yes, I have. Different configurations, that is, the use of components from different manufacturers, greatly affects the reliability and final cost of installations. Therefore, in order to avoid misunderstandings, it is recommended to choose installations equipped with components from well-known manufacturers, with good MTBF statistics.
28. What is included in the UKRM delivery kit?
Standard UKRM delivery kit:
Capacitor unit in standard packaging;
Manual;
Passport;
Spare parts kit.
29. Conclusion
This section provides the most necessary information on reactive power compensation devices for sales managers. The next section will describe the components of UKRM.
All types of capacitor units for reactive power compensation are necessary to stabilize the operation of electrical networks and reduce possible energy losses. This equipment includes static capacitor banks (SCB). Each BSC consists of parallel-series connected cosine capacitors in the shape of a star or triangle. The battery is equipped with current-limiting reactors, which are needed to regulate the current when turned on. For protection, a head switch or voltage transformer is used.
Thanks to this process, it is possible to significantly reduce the load on:
- wires;
- switching equipment;
- transformers.
By reducing resistance waveform distortion, the end user's power quality and the service life of all equipment are improved. But where does the interference in the current supply come from, and where does the need for compensation arise?
General questions of theory
In all large electrical networks, two types of resistance arise:
- active - for example, in incandescent lamps, electric heaters;
- inductive – for electric motors, distribution transformers, welding equipment, fluorescent lamps.
The total power is generated taking into account these two loads. This dependence is shown in more detail in the picture below.
When the voltage becomes negative and the current becomes positive and vice versa, a phase shift occurs in the current. At this moment, power flows in the opposite direction towards the generator, although it should go to the load. In this case, electrical energy fluctuates from the load to the generator and back, instead of moving through the network. The power that occurs during this process is called reactive power. This power generates a magnetic field, which also puts additional stress on the force fields.
In order to establish the full power of the network, it is necessary to determine both components: active and reactive. The value is calculated based on the power factor, or coefficient, which is cosφ - the cosine of the angle that appears between the curves of the active and reactive components.
Active power is used to convert into thermal, mechanical and other useful types of energy. Reactive is not suitable for use for these purposes, but without it the operation of transformers, generators and other equipment whose operation is based on the properties of the electromagnetic field is impossible. Electricity supply organizations supply only active loads, because reactance supplies:
- increase equipment power by reducing throughput;
- increase active losses;
- lead to a voltage drop due to the presence of a reactive component.
Features of installation of compensation equipment
It is most convenient to generate the reactive part directly from the consumer, otherwise the user will have to pay for electricity supplies twice. The first time is for the supply of the active part, and the second time – for the supply of the reactive part. In addition, such double supply will require additional equipment. To avoid this situation, capacitor reactive power compensation units are used.
Important! Installing reactive power compensation (RPC) does more than just save energy. At industrial enterprises in Russia, the energy saving potential is only 13-15% of total consumption.
The level of electricity consumed at an enterprise is constantly changing, that is, cosφ can increase or decrease. Thus, the higher the power factor, the higher the active component and vice versa. To regulate this process, capacitor units are required that can compensate for the reactive component.
The capacitors on which this compensation equipment is built keep the voltage value at a given level. The current in capacitors, as opposed to inductance, operates in a leading manner. Thus, capacitors act as phase-shifting equipment.
All capacitor installations for reactive power compensation are divided into regulated and unregulated. The main disadvantage of the latter is that with a significant change in load and power factor, overcompensation is possible. If there is a possibility of a significant increase in cosφ in the circuit, it is not recommended to use an unregulated PFC.
Regulated devices are capable of operating in a dynamic mode, monitoring and tracking readings for further analysis. The controller included in this equipment monitors and calculates several indicators right on site:
- level of reactive load in the external circuit;
- determines the existing power factor;
- compares the coefficient with the specified values.
If the obtained value differs from the standard, the regulator connects or disconnects certain capacitors included in the compensator installation. The use of this equipment makes it possible to fully control the level of electricity supply in enterprises with a large number of devices with different purposes. This is especially important if it is quite difficult to accurately track how the reactive component changes across the network. The general principle of compensation makes it possible not to install separate equipment for each device with a reactive component.
Efficiency of using capacitor units
Despite the fact that it is most convenient to compensate for the reactive component directly at the consumer, to improve the quality of supplied electricity, the first installations are used at substations. This makes it possible to relieve the network and already save 10 to 20% of energy. Therefore, at 0.4 kV substations, users are switched from overloaded phases to underloaded ones.
For non-industrial subscribers, it is almost impossible to qualitatively align the phases using only one capacitor unit. This is especially true for residential buildings with single-phase loads. Here, compensation is carried out at each phase and filters are additionally used, the capacity of which can be changed automatically.
The rated voltage of capacitor units can be very different. High-voltage equipment 6, 10, 35 kV is used at substations. Low-voltage devices 0.4-0.66 kV are used directly on loads. Due to their high speed, low-voltage devices can stabilize not only constant, but also intermittent reactive power.
In general, reactive power compensation consists of 2 stages:
- Centralized quality monitoring (rough compensation) by phase equalization and current filtering at substations;
- Individual compensation at industrial enterprises, their individual divisions, as well as at the level of small consumers - owners of apartments and private houses. During this work, the reactive power compensation device reduces energy losses by ensuring the current is sinusoidal.
Previously, the problems of energy saving among small consumers were practically not taken into account. It was believed that the reactive component affects only the operation of large enterprises that use induction furnaces, asynchronous motors, step-down transformers and other devices.
But recently, the amount of transformative and stabilizing equipment used in the social environment has increased significantly. Semiconductor converters worsen the shape of the current waveform, thereby negatively affecting the functioning of other devices. But so far, KRM devices are almost never used for private household consumers.
Video
In the modern global world, saving energy resources takes first place in its relevance. Energy saving, in some countries, is actively supported by the state not only for large consumers, but also for ordinary people. Which in turn makes the reactive power compensator relevant for home use.
Reactive power compensation:
Many consumers, having read on the Internet about reactive power compensation by large plants and factories, are also thinking about reactive power compensation at home. Moreover, now there is a large selection of compensating devices that can be used in everyday life. You can read about whether it is really possible to save some money on this at home in this article. And we will consider the possibility of making such a compensator with our own hands.
I’ll answer right away – yes, it’s possible. Moreover, this is not only a cheap, but also a fairly simple device, however, to understand the principle of its operation you need to know what reactive power is.
From the school physics course and the basics of electrical engineering, many of you already know general information about reactive power, so you should go straight to the practical part, but it is impossible to do this without skipping mathematics, which everyone dislikes.
So, to start selecting compensator elements, it is necessary to calculate the reactive power of the load:
Since we can measure components such as voltage and current, we can only measure the phase shift using an oscilloscope, and not everyone has one, so we’ll have to go a different route:
Since we are using the most primitive device of the capacitors themselves, we need to calculate their capacitance:
Where f is the network frequency, and X C is the reactance of the capacitor, it is equal to:
Capacitors are selected according to current, voltage, capacity, power, respectively, based on your needs. It is desirable that the number of capacitors be greater than one, so that it is possible to experimentally select the most suitable capacitance for the desired consumer.
For safety reasons, the compensating device must be connected via a fuse or circuit breaker (in case of too high charging current or short circuit).
Therefore, we calculate the current of the fuse (fuse link):
Where i in is the current of the fuse (fuse), A; n – number of capacitors in the device, pieces; Q k – rated power of a single-phase capacitor, kvar; U l – linear voltage, kV (in our case, phase without).
If we use an automatic machine:
After disconnecting the compensator from the network, there will be voltage at its terminals, so to quickly discharge the capacitors, you can use a resistor (preferably an incandescent light bulb or neon) by connecting it in parallel with the device. The block diagram and circuit diagram are given below:
Block diagram of switching on the reactive power compensator 
I'll demonstrate it more clearly The consumer is connected to hole number one, and the compensator is connected to hole number two.
Schematic diagram of the reactive power compensator 
Switching on via automatic fuse The compensating device is always switched on parallel to the load. This trick reduces the resulting circuit current, which reduces cable heating; accordingly, a large number of consumers can be connected to one outlet or their power can be increased.
Reactive power and energy, reactive current, reactive power compensationReactive power and energy degrade power system performance, that is, loading power plant generators with reactive currents increases fuel consumption; Losses in supply networks and receivers increase, and voltage drop in networks increases.
Reactive current additionally loads power lines, which leads to an increase in cross-sections of wires and cables and, accordingly, to an increase in capital costs for external and on-site networks.
Reactive power compensation, at present, is an important factor in solving the issue of energy saving in almost any enterprise.
According to estimates of domestic and leading foreign experts, the share of energy resources, and in particular electricity, accounts for about 30-40% of the cost of production. This is a strong enough argument for a manager to take the analysis and audit of energy consumption and development of methods for reactive power compensation. Reactive power compensation is the key to solving the issue of energy saving.
Reactive power consumers
Main consumers of reactive power- which consume 40% of the total power together with household and own needs; electric ovens 8%; converters 10%; transformers of all stages of transformation 35%; power lines 7%.
In electric machines, alternating magnetic flux is associated with windings. As a result, reactive emfs are induced in the windings when alternating current flows. causing a phase shift (fi) between voltage and current. This phase shift usually increases and decreases at light loads. For example, if the cosine phi of AC motors at full load is 0.75-0.80, then at light load it will decrease to 0.20-0.40.
Lightly loaded transformers also have low (cosine phi). Therefore, if reactive power compensation is applied, the resulting cosine phi of the energy system will be low and the electrical load current, without reactive power compensation, will increase at the same active power consumed from the network. Accordingly, when reactive power is compensated (using automatic capacitor units KRM), the current consumed from the network is reduced, depending on cosine phi, by 30-50%, and heating of conductive wires and insulation aging are correspondingly reduced.
Besides, reactive power along with active power is taken into account by the electricity supplier, and therefore subject to payment at current tariffs, and therefore constitutes a significant part of the electricity bill.
Structure of reactive power consumers in power system networks (by installed active power):
Other converters: alternating current into direct current, industrial frequency current into high or low frequency current, furnace load (induction furnaces, arc steel-smelting furnaces), welding (welding transformers, units, rectifiers, spot, contact).
The total absolute and relative losses of reactive power in the elements of the supply network are very large and reach 50% of the power supplied to the network. Approximately 70 - 75% of all reactive power losses are losses in transformers.
Thus, in a three-winding transformer TDTN-40000/220 with a load factor of 0.8, reactive power losses are about 12%. On the way from the power plant, at least three voltage transformations occur, and therefore reactive power losses in transformers and autotransformers reach large values.
Ways to reduce reactive power consumption. Reactive power compensation
The most effective and efficient way to reduce reactive power consumed from the network is the use of reactive power compensation units(capacitor units).
The use of capacitor units for reactive power compensation allows you to:
- unload power supply lines, transformers and switchgears;
- reduce energy costs
- when using a certain type of installation, reduce the level of higher harmonics;
- suppress network interference, reduce phase unbalance;
- make distribution networks more reliable and cost-effective.
