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Method for reducing electricity consumption and reducing losses in transmission lines

image credit: Andrew Dmitrev
ANDREW DMITREV's picture
Director Feigin Electric Singapore PTE LTD

While competition between renewable energy technologies lasts, some organizations realize that the immediate and most practical way to lower carbon emissions and drive the ecological revolution...

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  • Oct 5, 2021 10:14 am GMT
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ANY ELECTRIC ENERGY SYSTEM CONSISTS OF THREE MAIN STAGES:

  1. The stage of generating electric energy, based on different methods of transforming different kinds of energy (mechanical, heat, etc.) into electric energy.

For example:

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•             A source of mechanical energy can be the power of water (hydropower stations, pump storage plants, tidal energy stations).

•             Thermal sources of energy can be thermoelectric plants (TEP), nuclear power stations (NPS).

•             Alternative sources of energy can be wind power, solar energy, etc.

                     The main factor for all methods is the stability of their performance.

  1. The stage of transfer and distribution of electric energy is determined by the practicality of transferring it over large distances at the maximum high level of voltage. It will result in reducing current values in transmission networks, and, as a consequence, reducing losses during transmission of electric energy.
  2. The stage of transfer and distribution of electric energy is determined by the practicality of transferring it over large distances at the maximum high level of voltage. It will result in reducing current values in transmission networks, and, as a consequence, reducing losses during transmission of electric energy
  3. The stage of using electric energy is the main stage in the entire cycle of energy circulation, as it is the demand that generates offers.

The ultimate customer is interested in receiving electric energy at the maximum low level of voltage allowed by the Standard (less than nominal by 5-10%), namely: 

400V – (20V-40V) = 360V-380V

230V –(11.5V-23V) = 218.5V-207V

Increased levels of voltage lead to unjustified overconsumption of electric energy, reduction of the lifespan of all electrical equipment.

Now let’s consider the chain of factors described above in the reversed sequence.

(3)          Reduction of voltage for ultimate consumers of electric energy at the level of 0,4

kV, which is the maximum allowed according to the Standard, will lead to (2) the reduction of current values in feed line up to (1) the sources of energy production – generators at electric power stations. The reduction of currents will cause a reduction in losses.

The level of losses will decrease, first of all, at stage (2) of the transfer of electric energy. The physical manifestation of it will be the decrease in energy deficit value. This factor will dramatically influence the performance stability of segment (1) of the generation of electric energy networks: will increase the reliability of its parameters, the stability of the work of generators.

Direct and feedback links in the electric energy system are obvious.

Electric energy networks are an electric part of the energy system together with receivers fed from it, united by the common process of production, transfer, distribution, and consumption of electric energy.

In electric energy networks the three main processes are united:

(1)          The process of production of electric energy. The essential factor for the efficient operation of electric energy networks is the operation stability of synchronous generators at power stations, the main parameter of which is the operating frequency of produced energy.

The mass introduction of energy optimization technology allows to reduce the consumed voltage in the process of energy production and, as a consequence, to get a stable work of generators at power stations, that is their susceptibility to short circuit, voltage fluctuations, other transient states, which increases the stability and reliability of the energy system on the whole.

(2)          The process of transfer and distribution of electric energy. It is practicable to transfer electric energy at the maximum highest voltage level, allowed by the Standard.

The mass systematic use of energy optimization technology allows to reduce current values in transmission networks and, as a result, to reduce losses during the transfer of energy.

(3)          The process of consumption of electric energy. It is practicable to consume electric energy at the maximum lowest voltage level, allowed by the Standard. The ultimate consumer is interested in receiving electric energy at the maximum lowest voltage level, allowed by the Standard.

(less than nominal by 10%), namely: 400 V / 230 V – 40 V / 23 V = 360 VВ / 207 V.

The mass introduction of energy optimization technology allows the customer:

a)            To provide constant protection of electrical equipment from high voltage

b)            To increase the lifetime of electrical equipment.

c)            To reduce the amount of consumed electric energy.

d)            To receive the economy of financial resources.

Let’s consider the given processes in the reverse sequence:

(3) Maximum reduction of voltage on the level of ultimate consumers, allowed by the Standard, at 0,4 kV will lead (2) to the reduction of current values in feed lines up to (1) the sources producing electric energy – generators at power stations. The reduction of currents will lead to the reduction of losses.

The level of losses will decrease, first of all, at stage (2) of energy transfer. The physical manifestation of it will be the decrease in energy deficit value. This factor will dramatically influence the performance stability of the generating segment (1) of electric energy networks: will increase the reliability of its parameters, the operational stability of generators.

Direct and feedback links in the electric energy system are obvious

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Matt Chester's picture
Matt Chester on Oct 5, 2021

How does more distributed energy change these considerations? I think DERs are particularly valuable because the most effective way to increase efficiency of T&D is to limit the distance the electricity needs to cover. 

ANDREW DMITREV's picture
ANDREW DMITREV on Oct 5, 2021

Yes, but my proposal is a cheaper solution. Anyway, of course is best to use different options, depend on situation

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