EP2853015A1

EP2853015A1 - Method and device for assigning individual phase conductors in a polyphase energy distribution network

Info

Publication number: EP2853015A1
Application number: EP12729897.4A
Authority: EP
Inventors: Jaroslaw Kussyk; Johann Lichtnekert; Richard PITZ; Wolfgang Salmutter
Original assignee: Siemens AG
Current assignee: Siemens AG
Priority date: 2012-05-22
Filing date: 2012-05-22
Publication date: 2015-04-01
Also published as: US20150091545A1; US9482709B2; WO2013174415A1

Abstract

The invention relates to a method for assigning individual phase conductors (L1, L2, L3) at a first point (M1) to those at at least one further point (M2, M3) in a polyphase energy distribution network, in particular in a three-phase network, in the case of mains operation, wherein a common reference time is determined for these points (M1, M2, M3), and the time difference and/or phase difference of the phase voltage or the line-to-line voltage between the reference time of the zero crossing of the phase voltage are determined for these points, and by comparison of the time and/or phase differences at two different points the phase conductor of one point is assigned to a phase conductor of the further point which has the same to time and/or phase difference with respect to the common reference time. An additional loading of the energy supply network or an interruption of the mains operation is avoided by means of said method.

Description

description

Method and device for assigning individual

Phase conductor in a multi-phase power distribution network

Technical area

The invention relates to a method for assigning individual phase conductors at one point to those at at least one further point in a multi-phase energy distribution network, in particular in a three-phase network, in network operation, as well as a corresponding device. Such a point can be located anywhere in the energy distribution network, but at least the interest of the network connection points of consumers and the distribution stations, such as

Transformer stations (transformer stations), Netzverteilkästen and the like.

State of the art

For the three-phase AC transmission in electrical power distribution networks, in particular in central or

Low voltage networks, systems with three or four conductors are often used. During commissioning or when removing the

Energy distribution networks is often respected only on a uniform rotating field direction at the three-phase terminals of the households, for example, a cyclically successively rising or falling by 120 ° order of

Phase differences between the phase voltages in a four-conductor system or between the chained ones

Voltages in a system with three conductors.

This practice has the consequence that no association between the individual phase conductors of a distribution station, such as a transformer station, and the phase conductors in the consumer, known. In other words, you do not know which one Phase conductor at the consumer corresponds to which phase conductor in the distribution station.

With the increasing decentralization of energy generation, for example through private photovoltaic systems or small combined heat and power plants in private households, the use of electrical energy distribution networks is changing: from a central power distribution - from one or more transformer stations to the consumer - to an at least temporarily decentralized power distribution - from one household to another household or from several private ones

Energy generators to the transformer station or in

Medium voltage network. In order to be able to ensure the monitoring and control of the voltage quality as well as the monitoring of the power distribution in such decentralized power distribution networks, one needs an unambiguous assignment of one or more phase conductors at a consumer connection to a particular phase conductor of a strand of the energy distribution network, even in the event of a change in the structure of the energy distribution network ,

The use of grid expansion plans or installation plans is often not sufficient because they may be incomplete or may not correspond to the actual energy distribution grid.

It is known from DE 196 21 543 AI, to switch a load for a defined period of time with a certain size on a network phase of the power supply network and to identify the connected phase in the network based on this loading or discharge change. This has the disadvantage that not only an additional device must be provided for this purpose, but that this burdened the power grid. Only one network phase can be checked and assigned with this procedure. EP 0 961 125 A2 proposes to carry out the phase identification of medium-voltage cables in the state short-circuited to ground, by feeding in a

Audio frequency in the line to be identified. This has the disadvantage that the network operation must be interrupted. Even with this method, only one network phase after another can be checked and assigned.

Presentation of the invention

It is an object of the present invention to provide a method and an apparatus which

at least the disadvantages of the additional burden of

Energy supply network and the interruption of the

Network operation overcomes.

This object is achieved for a method having the features of patent claim 1 and for a device having the features of patent claim 9 or 10. advantageous

Embodiments of the invention are in the respective

dependent claims defined.

According to the invention, therefore, in the method for assigning individual phase conductors at one point to those at at least one further point in a multi-phase

Energieverteilnetz, in particular in a three-phase network, provided in network operation, that

- a common reference point for these posts

it is determined

- For the first place in the case of a four-wire network for at least one phase conductor, the time difference and / or

Phase difference of the phase voltage between the

Reference time and the time of zero crossing of the phase voltage is determined or in the case of

Dreileiternetzes for at least two phase conductors the

Time difference and / or phase difference of the chained

Voltage between the reference time and the time of the Zero crossing of the chained voltage is determined

- For the further point in the case of a four-wire network for at least one phase conductor, the time difference and / or

Phase difference of the phase voltage between the

Dreileiternetzes for at least two phase conductors the

Time difference and / or phase difference of the chained

Voltages between the reference time and the time of the zero crossing of the chained voltages is determined

and by comparing the time and / or phase differences at the first location with those at the further location of those phase conductors of the first location of a phase conductor

is assigned to another point, the same time and / or phase difference with respect to the common

Reference time.

A point according to the invention is a defined location in a multi-phase energy distribution network, where the phase voltages of at least one phase conductor are determined, ie measured. For example, to determine to which of the phase lines a particular consumer, such as a household, is connected, a location in or at a substation and another location may be provided to the consumer. If at any point a voltage measuring device is present, for example in a transformer station, in an electricity meter with

Remote reading, distribution network monitoring or voltage quality measuring equipment, it makes sense to use that voltage meter as the location.

The term "common reference time" means that the determination, such as the measurement, of the phase voltage at the at least two locations simultaneously or synchronously

takes place. If more than two digits are used for a measurement, then it must be ensured here too that the measurement takes place simultaneously at all points. Therefore, when the measurement is triggered by a signal, it is in determining the common reference time if necessary, take into account the duration of the signal to the individual points. If the propagation time of the signal to the phase duration of the alternating current of the energy distribution network is negligible, then no time correction of the signal must be made, and the reception time of the signal is used as a common reference time.

Since every full phase (360 °) of the phase voltage or the chained voltage has two zero crossings, with the "zero crossing of the phase voltage" either only the case of falling edge or always only that with

meant rising edge. When measuring the phase voltage or the chained voltage, this must be filtered if necessary, so that harmonics can be eliminated and the zero crossing of the basic shrinkage can be determined.

When comparing the time and / or phase differences at two different locations, where that phase conductor of the one location is assigned to a phase conductor of the other location, the same time and / or phase difference

with regard to the common reference time, it should be borne in mind that the "same time and / or

As a rule, due to measurement inaccuracies or slightly different actual reference times at different locations, the time and / or phase differences of a phase conductor will differ slightly (usually up to 5%). and or

Phase difference "here thus means that those time and / or phase differences are assigned to each other, which have the least deviation or scattering to each other.

The phase information, ie the phase difference (which is also referred to as phase shift) depends on the type of connection (phase voltage or chained voltage in a 4- and / or 3-conductor system). Of course

describe the terms "time difference" and "Phase difference" the same physical state and are therefore equally usable within the scope of the invention.

On the one hand, no additional load is used by the method according to the invention, and on the other hand, the

Mains operation are not interrupted, but for the method according to the invention is in fact just the current phase voltage required. In general, it will be provided in the method according to the invention that for each point the phase voltages or

chained voltages of all (three) phase conductors are determined at the reference time. This allows everyone

Phase conductors are clearly assigned to each other at the different locations - due to a single measurement process. It is therefore not necessary to carry out a plurality of successive measurements on the different phase conductors, as provided, for example, by DE 196 21 543 A1. However, the method can also be applied to only one or two phase conductors

Phase voltages at one point determines at least the phase voltage of a phase conductor and at a further location at least the phase voltage of a phase conductor. The

Phase voltage is always measured between the phase conductor and neutral. When the chained voltages are measured, at least one chained one at a location

Voltage measured (between two phase conductors) and at a further point at least one concatenated voltage. An embodiment of the invention provides that the common reference time is chosen such that this with the time of the zero crossing of a phase voltage or a chained voltage at the first location

coincides. This corresponds to the method in FIG. 3: Since the reference time coincides with a zero crossing, a measurement of the phase voltage or the chained voltage can be dispensed with. Regardless of the mentioned embodiments, the common reference time in a simple manner

Sending a signal to the locations. If the locations are located at different distances from the emission point of the signal, the propagation time of the signal may also be used when determining the common

Reference time. If the running time of the signal is negligible compared to the phase duration of the phase voltages, this will not be necessary.

For data transmission systems with several

Transmission sections (hops, repeats) can be at

Receiving the signal in the form of a data packet to wait for the safe reception on all hop levels or all repetitions, and only then the phase of the

Phase voltages are evaluated synchronously. As a result, any frequency fluctuations in the network frequency during the transmission due to the multiple hops or the multiple repetitions can not affect the measurement accuracy.

In particular, in this case can then be provided that the time of receipt of the signal - at the respective

Measuring point - the common reference time is. But it is also possible that the signal contains information that determines the reference time for a time after the signal is received. Thus, the signal may include information that the measurement should be made at a certain time in the future, and that time is read on a local clock. In addition, the signal may also contain information about

Synchronization of a local clock at one point with those at other locations included, thus the measurement of the

Phase voltages then actually involved in all

Measuring points based on the respective local clocks takes place at the same time. It would also be possible to determine the common reference time by several signals transmitted in succession.

In principle, there are different ways in which the signal is transmitted to the individual points.

One possibility is that the signal is transmitted via one or more conductors (phase conductors, neutral conductors). It can therefore be used advantageously for the transmission of the signal the power distribution network. The signal can be generated in particular for this purpose at about one point and transmitted by the latter and then transmitted to the other point. This has the advantage that the signal generator can be integrated into the devices necessary for carrying out the method at one of the points. This also allows data from this point, such as phase angles of

Phase voltages absolute and relative to each other, information on a (recurrent) transmission time, a temporal reference of the transmission time to the current phase of at least one phase conductor, etc., with this signal to others

Jobs are transferred.

The signal can also be transmitted via another wired or wireless transmission medium, such as via radio.

But it can also be provided that the signal generator is located at a different location than at one point. The signal can also, especially if it is sent from a point in the multiphase power distribution network

Information about the time or phase differences of

Phase voltages or chained voltages at one point, in particular to that according to claim 3.

The inventive device for carrying out the

The method according to the invention is characterized in that a signal generator for setting the common

Reference date is provided,

a phase measuring unit is provided at at least two points, with which the time of the zero crossing of the

Phase voltage at at least one phase conductor or the chained voltage of at least two phase conductors

can be measured

- At these points one with at least one

Phase measuring unit connected comparison unit is provided, which can be determined with the phase measuring unit, the time difference or the phase difference between the reference time and time zero crossing, and

- At least one with the or the comparison units

connected assignment unit is provided, with which by comparing the time or phase differences at two different locations that phase conductor of the first

Can be assigned to a phase conductor of the second position, which has the same time or phase difference.

An alternative device provides that

at a first location, a signal generator for determining the common reference time at the time of

Zero crossing of a phase voltage or a chained voltage is provided,

a phase measuring unit is provided at the first location and at at least one further location with which the

Time of zero crossing of the phase voltage at at least one phase conductor or the chained voltage of

at least two phase conductors can be measured,

at the second position, a comparison unit connected to the phase measuring unit is provided, wherein with the phase measuring unit the time difference or the phase difference between reference time and time of the zero crossing can be determined, and with the comparison unit that

Phase conductor of the first position can be assigned to a phase conductor of the second position,

- in one place, especially the first one, one Allocation unit is provided, with which the information about the assignment is collected and further

can be distributed. The device for setting the common

Reference time point may include a transmitting and receiving unit at each point and a signal generator, in particular at one point. For the transmission of signals, in particular of data packets, at least one transmission and

Be arranged receiving unit for transmitting signals, in particular data packets, with the

Phase measuring unit and optionally connected to the signal generator, the comparison unit and the allocation unit.

For the transmission of signals, in particular of data packets, over the energy distribution network can be provided that at each point the transmitting and receiving unit with the

Phase conductors and the neutral conductor is connected. Alternatively it can be provided that at each point the transmitting and receiving unit for the transmission of signals by means of conductors that do not belong to the energy distribution network, is formed by radio or by optical transmission.

BRIEF DESCRIPTION OF THE FIGURES For further explanation of the invention, reference is made in the following part of the description to the figures, from which further advantageous embodiments, details and

Developments of the invention can be seen. FIG. 1 shows a schematically represented invention

Device with a reference unit,

Figure 2 shows the time course of the phase voltages of

Phase conductor of Figure 1, Figure 3 is a schematically illustrated invention

Device without reference unit

Figure 4 shows the time course of the phase voltages of

Phase conductor of Figure 3.

Embodiment of the invention

Figure 1 shows a section of a three-phase network consisting of three phase conductors LI, L2, L3 and a

Neutral conductor N. In the first place Ml is a first

Unit E provided, at the second location M2, a second unit Ex is provided. Between the first and second location, a third unit, a so-called reference unit Er, is provided at a third location M3. The three

Phase conductor - first phase conductor LI, second phase conductor L2, third phase conductor L3 - are in the first position Ml in the illustration in Figure 1 in ascending order of each other, between the first Ml and third place M3, the phase conductors LI and L2

so that the first phase conductor Llr at the third position M3 corresponds to the second phase conductor L2 at the first position Ml, and the second phase conductor L2r at the third position M3 corresponds to the first phase conductor LI at the first position Ml. Between the third position M3 and the second position M2, a point is drawn, at which possibly again a permutation of the phase conductors takes place, so that it is not known which phase conductor L1x, L2x, L3x at the second point M2 (about the connection location of a

Consumer) which phase conductor at the first or third place Ml, M3 corresponds.

In the first unit E at the first location Ml a signal generator 1 is provided which generates a signal which is sent via a transmitting and receiving unit 5 to the other locations M2, M3. The signal generator 1 also has a connection to the allocation unit 3, which is not shown here in FIG. In this embodiment, the Transmitter and receiver unit 5 a modem, namely a

so-called DLC modem (distribution line carrier modern), which data via one or more phase conductors of the

Three-phase network can transmit and receive. This DLC modem usually uses a frequency range of 3 to 95 kHz (it would also be possible up to 500 kHz) with a data transmission rate of less than 100 bit / s up to several 10 kbit / s. At the second and third place M2, M3, a second unit Ex or a third unit (reference unit) Er are arranged, which also each have a designed as a DLC modem transmitting and receiving unit 5. The

Transmitting and receiving units 5 are connected at each point Ml, M2, M3 respectively with the three phase conductors LI, L2, L3 and with the neutral conductor N.

Since, in the present example, the first position Ml takes over the assignment of the phase conductors, here is the transmission and

Receiving units 5 also with the allocation unit. 3

connected, which is also arranged in the first unit E. The second and third place M2, M3 have in their units Ex, Er each have a phase measuring unit 4, which with the three phase conductors LI, L2, L3 and with the

Neutral conductor N is connected at the respective point, with the phase measuring unit 4, the time of zero crossing of the phase voltages in the three phase conductors LI, L2, L3 can be measured. The second and third points M2, M3 additionally each have a comparison unit 2 connected to the phase measuring unit 4, with which reference numeral 2 for the

Phase conductor, the time difference or the phase difference between the reference time and time of the zero crossing of the phase voltage can be determined. The

Comparison unit 2 is in each case with the transmission and

Receiving unit 5 connected so that the determined time or phase difference can be transmitted to the allocation unit 3, with which by comparing the time or Phase differences, the phase conductors of different locations can be assigned to each other.

FIG. 2 shows the time profile of the phase voltages at the points M 1, M 2, M 3 from FIG. 1 and the transmitted data packet TxD.

The signal generator 1 of the first unit E transmits in

periodic intervals over the modem (send and receive)

Receiving unit 5) from a data packet TxD in the three-phase network, which is thus used as a communication medium between the units E, Er and Ex. In the second unit Ex, the data packet is received as RxDx via the modem (transmitting and receiving unit 5), in the third unit Er via the modem (transmitting and receiving unit 5) as RxDr. Together with additional information about the respective term of the

Data packets are the data packet RxDx or RxDr to the

pass each comparison unit 2. In the

Phase measuring units 4 of the units Er, Ex, the measurement of the phase information of the phase voltages of the individual phase conductors is triggered due to the reception of the data packet, the zero crossings of the phase voltages ULlr, UL2r, UL3r or ULlx, UL2x, UL3x are detected and as

Phase information of the respective comparison unit 2 for comparison with the reception times of the data packets RxDx or RxDr passed. The reception time, corrected if necessary by the transit time of the data packet RxDx or RxDr, represents the reference time. When comparing in the comparison units 2 of the units Er, Ex, time differences AtLlx, AtL2x, AtL3x or

AtLlr, AtL2r, AtL3r formed between the reception times of the data packets RxDx or RxDr on the one hand and the times of the zero crossings of the corresponding phase voltages ULlx, UL2x, UL3x or ULlr, UL2r, UL3r on the other. These time differences are shown in FIG. The time differences AtLlx, AtL2x, AtL3x, AtLlr, AtL2r, AtL3r, together with the associated terminal designations or terminal numbering of the phase conductors Llx, L2x, L3x, Llr, L2r, L3r from the comparison units 2 via the modems

(Transmitting and receiving units 5) of the units Ex, Er transmitted to the allocation unit 3 in the unit E. There, the individual time differences are sorted into three groups based on their values, each group contains approximately the same time differences:

Group 1: AtL2r, AtL3x

Group 2: AtLlr, AtLlx

Group 3: AtL3r, AtL2x Since the allocation unit 3 previously the assignment of

Phase conductors Llr, L2r, L3r at the third position M3

(corresponding to the third unit or reference unit Er) to those at the first location Ml (corresponding to the first unit E), the assignment of the phase conductors Llx, L2x, L3x at the second location M2 (corresponding to the second unit Ex) and thus the mutual assignment of all phase conductors at all points Ml, M2, M3 be made:

LI corresponds to L2r or L3x,

L2 corresponds to Llr or Llx,

L3 corresponds to L3r or L2x. If required, this information can also be transmitted to the units Ex and Er, in particular their comparison units 2, approximately also via the phase conductors by means of the modems (transmitting and receiving units 5). The information may also be communicated to other devices and systems.

In general, in this embodiment, the information about the time differences and / or the current phases of the phase voltages of the individual phase conductors together with their unique numbers in the energy distribution network and possibly with other measured values via the same transmission system as that for the data packet TxD or RxDx and RxDr (ie by means of DLC modems via the energy distribution network) or via a

additional data transmission system all

Allocation units 3 are provided which require information about the phase conductor assignment at the points (connection points) of the energy distribution network. The signal generator 1 may be integrated in the allocation unit 3. As a result, the signal generator 1 can simply be given all the data that it transmits to the signal in the form of the

Data packets TxD should record.

In the allocation unit 3, the time differences or the current phases are subdivided into groups with the smallest possible scattering of the values. Thus, conductor terminals at different locations (locations) of the power distribution network are assigned to a common phase conductor. This corresponds to a relative allocation. In order to then make an absolute assignment of the grouped connections, it requires at least one reference terminal per group of

Time differences or phases whose name is known. In Fig. 1 are the reference terminals in the

Reference unit Er.

FIG. 3 shows a further exemplary embodiment in which the device according to the invention without

Reference unit He gets along. The device consists in

Essentially from a central first unit E and a second unit Ex. It could also be several units Ex exist.

The detail shown in Figure 3 from a

Three-phase network again consists of three phase conductors LI, L2, L3 and a neutral conductor N. At the first location Ml a first unit E is provided, at the second location M2, a second unit Ex is provided. The three phase conductors - first phase conductor LI, second phase conductor L2, third 1 b

Phase conductor L3 - are in the first position Ml in the illustration in Figure 3 in ascending order on top of each other, between the first Ml and second point M3 a point is located at the possible way a permutation of the phase conductors takes place, so it is not known which Phase conductor Llx, L2x, L3x at the second point M2 (about the point of connection of a consumer) which phase conductor corresponds to the first location Ml.

In the first unit E at the first location Ml a signal generator 1 is provided which generates a signal which is sent via a transmitting and receiving unit 5 to the other point M2. The signal generator 1 is controlled by the phase measuring unit 4 arranged in the unit E. Also in this embodiment, the transmitting and receiving unit 5 is a DLC modem. At the second location M2, a second unit Ex is arranged, which likewise has a transmitting and receiving unit 5 designed as a DLC modem. The transmitting and receiving units 5 are at each point Ml, M2 each with the three phase conductors LI, L2, L3 and with the

Neutral conductor N connected.

The assignment of the phase conductors takes in Fig. 3 the

Comparative unit 2 in the or in each of the units Ex in several such units. The provided at the first location Ml allocation unit 3 (and / or more

Allocation units elsewhere) receives the

Information about the assignment of the phase conductor connections of the or the comparison units 2 of the units Ex, so here is the transmitting and receiving units 5 also with the

Assignment unit 3 is connected, which is also arranged in the first unit E. The first and second positions M1, M2 each have one in their units E, Ex

Phase measuring unit 4, which is connected to the three phase conductors LI, L2, L3 and to the neutral conductor N at the respective location. The second point M2 additionally has a comparison unit 2 connected to the phase measuring unit 4, with which the phase conductors Llx, L2x, L3x have the Time difference or the phase difference between

Reference time and time of zero crossing of

Phase voltage can be determined. The comparison unit 2 is connected to the transmitting and receiving unit 5, so that the determined time or phase difference and the resulting

certain assignment of the phase conductors to the allocation unit 3 can be transmitted. Also in this embodiment, therefore, the three-phase network is used as a communication medium between the units E, Ex.

The phase measuring unit 4 of the first unit E detects the zero crossings of the phase voltages ULI, UL2, UL3 and controls by this information the signal generator 1, which in

periodic intervals over the modem (send and receive)

Receiving unit 5) between the neutral conductor N and the first phase conductor LI synchronous to the zero crossing of

falling edge of the phase voltage ULI sends a data packet TxD into the three-phase network. The data packet TxD contains information that the data packet TxD has been transmitted in synchronism with the zero crossing of the falling edge of the phase voltage ULI and via the phase relationship or the phase order of the phase voltages ULI, UL2, UL3 at the first position Ml, ie those values measured with the first unit E.

The data packet TxD could be the signal generator 1 and the

Comparison units 2 are also made known via another transmission path or with another data packet. Figure 4 shows schematically the time course of

Phase voltage of the phase conductors of Figure 3. The first unit E transmits at the zero crossing of the falling edge of the phase voltage ULI a data packet TxD to the second unit Ex. In the second unit Ex, the data packet as RxDx via the modem (transmitting and receiving unit 5) is received ,

Together with additional information about the respective runtime of the data packet for runtime correction, the data packet RxDx is transferred to the comparison unit 2. In the Phase measuring unit 4 of the unit Ex, the zero crossings of the phase voltages ULlx, UL2x, UL3x are detected and passed as phase information of the comparison unit 2 for comparison with the reception times of the data packets RxDx. The possibly at the runtime of the data packet RxDx

corrected reception time represents the reference time.

When comparing in the comparison unit 2 of the unit Ex, time differences AtLlx, AtL2x, AtL3x between the

Receiving time of the data packet RxDx on the one hand and the times of the zero crossings of the phase voltages ULlx, UL2x, UL3x on the other hand formed. These time differences are shown in FIG.

Due to the information transmitted in the data packet RxDx, only the smallest one has to be in the comparison unit 2

Time difference can be determined, because the phase conductor with the smallest time difference, which is zero in the ideal case, corresponds to the first phase conductor LI at the first point Ml, whose time difference is also zero, because

Data packet TxD was sent out at the zero crossing of the falling edge of ULI. In the present example, the phase conductor L2x according to FIG. 4 has a vanishingly small time difference AtL2x at the second location M2, so that the first phase conductor LI at the first location Ml corresponds to the second phase conductor L2x at the second location M2. Due to the phase information of the

Phase voltages UL2 and UL3 at the first location Ml, which was included in the data packets TxD and RxDx, the remaining phase conductors Llx, L3x at the second point M2, the phase conductors of the first point M2 can be absolutely assigned: ideally the same or almost the same phase difference (or time difference) at the zero crossing of the falling edge of the phase voltage means the same phase conductor:

LI corresponds to L2x,

L2 corresponds to L3x, L3 corresponds to Llx.

Afterwards, this information is transmitted to the allocation unit 3 of the first unit E via the DLC connection, that is to say the modems (transmitting and receiving units 5) and the phase conductors. Also in this embodiment, the information may be provided to other devices. Of course, there are also other options open to determine the common reference time, for example by specifying a specific reference time, such as that the measurement should be performed every hour, or by a corresponding local time setting in the

Comparative units 2, which then the corresponding

Initiate measurements through the phase measuring units 4.

With the subject invention, an automatic detection of the phase conductor assignment is made possible in an electrical energy distribution network, without knowledge of its topology or by changing the topology by

Switching in the energy distribution network or between multiple distribution networks or energy supply points. The procedure is for both three- and for

Four-conductor systems suitable and for their combinations.

For carrying out the method according to the invention, devices can be used which are already in one

Distribution network exist and can be used, for example

Devices for remote meter reading or for measuring the voltage quality.

Reference sign list

1 signal generator

2 comparison unit 3 allocation unit

4 phase measuring unit

5 transmitting and receiving unit

E first unit

He third unit (reference unit)

Ex second unit

LI, L2, L3 first, second, third phase conductor

Ml, M2, M3 first, second, third place

N neutral conductor

RxDr data packet in the third unit Er

RxDx data packet in the second unit Ex

TxD data packet in the first unit E

ULI, UL2, UL3 phase voltages at first unit E

ULlr, UL2r, UL3r Phase Voltage at Third Unit He ULlx, UL2x, UL3x Phase Voltage at Second Unit Ex AtLlx, AtL2x, AtL3x Time Differences at Second Unit Ex AtLlr, AtL2r, AtL3r Time Differences at Third Unit Er

Claims

Method for assigning individual phase conductors (LI, L2, L3) at a first location (M1) to those at at least one further location (M2, M3) in a multi-phase energy distribution network, in particular in a three-phase network, in network operation, wherein

- for these posts (Ml, M2, M3) a common

Reference time is determined

- For the first place in the case of a four-wire network for at least one phase conductor, the time difference and / or phase difference of the phase voltage between the reference time and the time of the zero crossing of the phase voltage is determined or in the case of a three-wire network for at least two phase conductors, the time difference and / or phase difference chained voltage between the reference time and the

Time of the zero crossing of the chained voltage is determined

for the further point in the case of a four-wire network for at least one phase conductor, the time difference and / or phase difference of the phase voltage between the reference time and the time of the zero crossing of the phase voltage is determined or in the case of a three-wire network for at least two phase conductors, the time difference and / or phase difference chained voltages between the reference time and the

Time of the zero crossing of the chained voltages is determined

- and by comparing the time and / or

Phase differences at the first location with those at the further location of those phase conductors of the first location is assigned to a phase conductor of the further location having the same time and / or phase difference with respect to the common reference time.

A method according to claim 1, characterized in that for determining the time difference and / or Phase difference at both locations the phase voltages or the chained voltages of all three

Phase conductors are determined at the reference time.

A method according to claim 1 or 2, characterized

characterized in that the common reference time is chosen so that this with the time of

Zero crossing of a phase voltage or a

chained voltage coincides in the first place.

Method according to one of claims 1 to 3, characterized in that the common reference time is set by sending a signal to the points (Ml, M2, M3).

A method according to claim 4, characterized in that the signal contains information that the

Defines the reference time for a time after receiving the signal.

A method according to claim 4 or 5, characterized

characterized in that the signal via one or more conductors (LI, L2, L3, N) of the multiphase

Energy distribution network is transmitted.

Method according to one of claims 4 to 6, characterized in that the signal from a location (Ml, M2, M3) is emitted in the multi-phase power distribution network.

Method according to one of claims 1 to 7, characterized in that the signal also contains information about the time or phase differences of the phase voltages or chained voltages at a location, in particular at the first location according to claim 3.

Apparatus for carrying out the method according to one of claims 1 to 8, characterized in that a signal generator (1) is provided for setting the common reference time,

- Provided at at least two points, a phase measuring unit (4), with which the time of

Zero crossing of the phase voltage can be measured at least one phase conductor or the chained voltage of at least two phase conductors,

- At these points one with at least one

Phase measuring unit (4) connected comparison unit (2) is provided, wherein with the phase measuring unit (4) the time difference or the phase difference between

Reference time and time of zero crossing can be determined, and

- At least one associated with the or the comparison units (2) assignment unit (3) is provided, with which by comparing the time or phase differences at two different locations that phase conductor of the first location can be assigned to a phase conductor of the second location, the same time - or

Has phase difference.

Apparatus for carrying out the method according to one of claims 1 to 8, characterized in that

- At a first location, a signal generator (1) for setting the common reference time at

Time of zero crossing of a phase voltage or a chained voltage is provided,

a phase measurement unit (4) is provided at the first location and at at least one further location, with which the time of the zero crossing of the

Phase voltage can be measured at at least one phase conductor or the chained voltage of at least two phase conductors,

in the second position a comparison unit (2) connected to the phase measuring unit (4) is provided, wherein with the phase measuring unit (4) the time difference or the phase difference between reference time and time of the zero crossing can be determined, and with the comparison unit (2) that phase conductor of the first position can be assigned to a phase conductor of the second position,

- At one point, in particular the first point, an allocation unit (3) is provided with which the information about the assignment can be collected and distributed.

Apparatus according to claim 9 or 10, characterized

characterized in that at least one transmitting and receiving unit (5) is arranged at each point, for the transmission of signals, in particular of data packets, with the phase measuring unit (4) and optionally with the signal generator (1), the comparison unit (2) and the Assignment unit (3) is connected.

Apparatus according to claim 11, characterized in that at each point the transmitting and receiving unit (5) with the phase conductors and the neutral conductor for

Transmission of signals, in particular data packets, connected via the power distribution network.

Apparatus according to claim 11, characterized in that at each point the transmitting and receiving unit (5) for transmitting signals by means of conductors which do not belong to the energy distribution network, by means of radio or by optical transmission is formed.