DE2404234C2 - Arrangement for load distribution in low-voltage networks - Google Patents

Description

40

The invention relates to an arrangement for load distribution in low-voltage networks using limiters assigned to certain consumers, adjustable in stages, adjusted by Ripple control systems takes place.

For electricity supply companies. which do not have sufficient capacity on the producer and distributor side, there is a need to carry out a targeted load distribution to compensate for peaks and valleys of the load curves. The load distribution can be influenced in a known manner in that only a certain predetermined output is made available to the consumer, which is possible with the aid of over-consumption counters or limiters. The overconsumption counter solves the problem only indirectly through the significantly higher costs that the consumer incurs when he exceeds the performance limit and thus has to pay the significantly higher Tnrif. The limiters have the disadvantage for the consumer. that if the / mx provided power is exceeded, the relevant circuit is rigorously switched off.

However, it is already an arrangement for load distribution of the type mentioned at the beginning DE * PS 6 70391 known in the as a limiter working energy saving devices rhythmically in " briefly "successive time intervals pressed who ' the. The operating rhythm is chosen in this way and in terms of time for the individual electricity consumers offset that during the switch-on times the electricity consumer does not cause a higher load on the power plant is considered to be equivalent to a permissible, evenly distributed continuous load. The familiar arrangement has the disadvantage that, due to the rhythmic switching on and off, it is mainly only used for memory is suitable, since it does not depend on the duration of the activation at certain times.

There is also a method for stepless distribution electrical energy (DE-OS 21 20 985) known, in which electrical energy from a main line in multiple secondary lines is distributed. The latter are in turn divided into two branches, wherein a power limiter is switched on in the first branch line to cut the power through the first Branch line to limit a certain maximum value while in the second branch line a power regulator is located, which regulates the flow of energy through the second branch line continuously so that the Total power through the two branch lines does not exceed a certain maximum value. The power regulator are linked to one another via a control unit and are controlled by the latter in such a way that the total the power output by all secondary lines does not exceed the load-bearing capacity of the main line. This procedure is based on a control loop that is controlled by can not be influenced externally, and the control processes run automatically. One way of throttling of total consumption is not provided.

A method similar to the above method is known from DE-OS 23 16 341. A power limiter is also switched on in the first branch line, while the power regulator located in the second branch line regulates the power for the second branch line so that the total power does not fall below a certain minimum terminal voltage on the secondary line. w ^; Approx. intervention is also pending in this procedure. not possible outside in the power budget of the network.

It is the object of the invention to provide an arrangement of To improve the type mentioned in such a way that with limited energy supply a control of the Energy consumption can be done from the outside, so as to ensure the supply of vital consumers and a limited but guaranteed lower level for all other consumers To offer the amount of energy.

According to the invention, this object is achieved in that cm zv your limiter, which can be bridged by a ripple control receiver, is connected in series with the specific limiters, which are preferably assigned to all private consumers. Another inventive solution is then that th limited hours. Preferably all private consumers is associated with an adjustable limiter in stages and all non-essential consumers are in a parallel branch, the one ripple control receiver Switchable limiter you is preceded by a ^r ch.

The Lrfindung has the advantage that the consumer even in the worst case, there is still so much electrical power available that it is below the can operate the device at the set power limit without disturbing the operation would occur due to further interruptions. Further advantageous embodiments of the invention are objects of the subclaims,

With reference to the drawing: .. 'g ^ ei the invention below at three different, in the F i g. 1 to 3 illustrated embodiments shown in more detail.

In the arrangement according to FIG. I, behind the house connection of a consumer there is a limiter Bsi which can be set in stages and which is in series with a second limiter Bz . The limiter Bz can be influenced by a ripple control receiver R. The connected load L is normally only limited by the step limiter Ss, since the limiter Bz is short-circuited during normal operation. Only in special cases, when only a limited amount of energy is available, is the limiter Bz switched on via the ripple control receiver R , which then only allows a considerably reduced output.

In the arrangement according to FIG. 2, a load L is connected downstream of a controllable level limiter SBs _1. With the help of a ripple control receiver R , the limiting element is influenced so that the upper limiter, which is initially set to a higher level, can be switched down to a lower level.

Of course, the device is made so that the resetting of the limiter to the higher Stage with the help of the ripple control receiver can.

Fig. 3 shows an arrangement in which two consumers L 1 and L 2 are connected in parallel to the network. A step limiter Bsi is connected upstream of consumer L 1, while an additional limiter Bz is located in front of consumer L 2. This

ίο Additional limiter Bz can again be influenced by a ripple control receiver. While the consumer L 1 is a vital consumer who is only limited in his power consumption by the level limiter Bsi , the consumer /. 2 can be downshifted to significantly reduced performance by the addition / limiter Bz via the ripple control receiver R. In special cases, the consumer L 1 can also be connected to the Net / without an upstream stage limiter (dashed connection).

For this 1 sheet of drawings

Claims (4)

Patent claims: 1. Arrangement for load distribution in low voltage networks, using assigned certain consumers which can be set in stages. Limiters which are adjusted by ripple control systems, characterized in that a second limiter (Bz) in each case that can be bridged by a ripple control receiver (R) with the specific limiters (Bs ₁ , SBsi) assigned to (preferably all private) consumers (L) Is connected in series. 2. Arrangement for load distribution in low-voltage networks, using limiters that can be set in stages and assigned to certain consumers, the adjustment of which is carried out by ripple control systems, characterized in that certain (preferably all private) consumers (Li) have a limiter (B _s ,) which can be set in stages. and all non-vital consumers (L ₂ ) are in a parallel branch, which is preceded by a limiter (Bz) that is cinchalizable by a Rundstcucrcmpfängcr (R) 3. Arrangement according to claim 1, characterized in that both limiters (Bs ,, Bz) are combined into one in which the limiting element can be influenced by the ripple control receiver. 4. Arrangement according to claim 3, characterized in that the limiting element is a thermal Organ, e.g. B. a bimetallic strip, which is used with a plus-'ichen by the ripple control receiver switchable or short-circuit heater is provided or that two separate thermal Organs are provided from one through the ripple control receiver can be influenced.