BG65631B1 - System and method for electric energy measurement and billing, checking and optimization of energy losses in low voltage electric distribution networks - Google Patents

Abstract

The system and the method relate to electric energy measurement and billing, checking and optimization of the line losses in an electric distribution network which has at least one reference (supplying) point (11, 21, 22), connected by one or mltiple supplying lines (3-6) to one or to multiple supply connections (31-42). By it, electrical enegry measurement is effected by electric energy measurement by recording any losses from the electric distribution network by the comparison of the supplied energy across the reference points and the billed electric energy at the connected to them supply connection during the same period of time . The system comprises one or more central measuring units of electric power (electric meters) fitted at the reference (supply) points, and one or multiple measuring units of electric power (electric meters) fitted on the one or the multiple supply units. To each of the electric meters, both central, and clients" meter, a device for time registration of the data for electric power consumption is connected.

Description

Technical field

The invention relates to the measurement of 10 consumed electrical energy and the recording, detection and optimization of energy losses in low-voltage distribution networks.

BACKGROUND OF THE INVENTION

All transmission grids, irrespective of their operating voltage, result in losses of electricity, which losses can be conditionally divided into resistive losses (caused by transmission line resistance), technical losses (caused by faulty equipment) and trade losses (caused by theft). 2 5 In low-voltage distribution networks, technical and commercial losses account for the largest share of the energy supplied. The main problem in accurately determining these losses is the lack of a method and a system for accurately accounting for them. At 3 0 the present state of the art, the electricity supplied and consumed can be accurately measured, but due to the many points of consumption of electricity its reading could not be done in 35 real time, allowing an accurate comparison of the delivered and consumed electricity. over the same time period. The main question facing the technique at the moment is how to read the meter data simultaneously. Methods and systems for detecting and localizing linear losses in the distribution network have been created to solve this problem / EP 1071186 /. These methods use sophisticated apparatus to transmit signals to meters across heterogeneous channels for synchronization over time, and the data obtained does not accurately determine the amount of energy lost.

SUMMARY OF THE INVENTION

The present invention solves the aforementioned metering problem: a supplied and reported electric energy km ι at the same time, as well as the calculation, localization and optimization of energy losses in low voltage power grids.

The invention relates to central power systems that have at least one power supply point connected to the power distribution system and a method for power measurement and recording, detection and optimization of energy losses in a distribution network. through one or more supply lines to one or more supplies: nodes The system consists of one or more <metering meters], located at reference points: <points and one or multiple electricity (meters), p suitably arranged on one or more delivery units. In accordance with the present invention, a device for temporarily recording electrical energy consumption data is connected to each of the meters, both central and customer. The present invention provides power metering with loss accounting for the switching network by comparing the delivered energy through the reference points and the reported electricity in connected ceiling units over the same time period. The calculation, detection and optimization of linear losses are performed by the target method.

According to the method, of the energy delivered through the support pole and the measurement of the electricity consumed through the delivery nodes delivered to them during the support point over a period of time. According to Metol;

are measured in total, by tariff units and by phases. According to the method, the difference between the delivered and consumed electricity for the same period of time is calculated. In the case of a difference between the latter, a greater than the technically justified one is to compare the pre-calculated ratios of each consumer, the total and the ps tariff zones, to which they are specially designed for seam measurement [kt of electricity for the same energy consumed2

65631 Bl to the energy supplied through the support node, both in total and in tariff zones, for the current and past periods. According to the method, the calculations made in advance for the ratio of the consumption of each consumer to the consumption through their respective phase cable, in total and by tariff zones, for the current and for the previous periods are compared. According to the method, consumers who have experienced differences in relationship are defined as “leakage points” and are subject to close scrutiny. The method can be performed manually and automatically in designed and customized devices.

Separate parts of the system may include one or more of the following.

Time consuming data recording devices can be designed and configured to cycle the current data from consumed electricity to a pre-programmable repetitive moment.

Time consuming data recording devices can be designed and configured to record consumed electricity for a specific pre-programmable, recurring time period.

The recorded data from the devices for temporarily recording the data for consumed electricity can be provided for information and processing by visualization.

The system may include additional devices for transmission and / or storage and / or processing of the data registered by the devices for temporarily recording the data for consumed electricity.

Recorded data from time consuming data recording devices for consumed electricity may be provided to other devices for transmission, storage, processing by communication methods including optical data transmission, radio frequency data transmission or wired data transmission.

Explanation of the annexed figures

Figure 1 is a diagram of part of a low-voltage distribution network;

Figure 2 is a diagram of an energy metering and energy loss reporting system;

Figure 3 is a diagram of an energy metering and energy loss measurement system with a built-in device for temporarily recording data for consumed electricity;

Figure 4 is a block diagram of data storage devices included, registered by the devices for temporarily recording data for consumed electricity;

of the system with ic, processing and figure 5 - block diagram of algorithm optimization of the method of reporting, detection and linear losses.

Examples of carrying out the invention

6, which passes the supply lines as shown in figure 1, transformer substations 1,2 include a plurality of power cables 3 even through one or more support points 11,21,22 and reach 31-42, where Consumption of low voltage consumers is taken into account.

As shown in the Figures 11,21,22, it includes the corresponding electricity meters (meters) 23,24,25, which measure the total and by tariff zones the energy supplied through the conduits 11, 21, 22, as well as the delivered by tariff zones for individual u; power supply units. In order to modify the energy input at the customer electrical installation, ie the corresponding nodes 3142 include the corresponding dimensions of energy (meters) 13-54, which measure the consumption of individual power supplies. energy in general and resulting from the tearing of power consumers.

In accordance with the present invention, the central 23, and from the electromecact is shown in FIG. 2, to

24,25, and time recording devices 100-118, measured, are connected to user meters 43-54. Time loggers 100-118 are pre-configured to store cyclical readings of the meters at a time which is the same (common) for all meters, central 23, 24,25, and user 43-5 4. Data loggers;

nor 100-118 mo3

65631 Blat to store consumer consumption over a period of time, with the same for all start and end times.

As shown in FIG. 3, the time recording devices may be incorporated into the structure of the meters, both client 43-54 and central 23,24, 25, thus forming electromeric devices designated 143-154 and 123,124,125, respectively.

As shown in Figure 4, data recorded by time loggers 100-118 can be collected manually - by visualization and / or automatically, using optical and / or wired communication protocols 92. Manually and by the same communication methods 92 settings and updating of time loggers 100-118 can be performed. The data collected from the system described above is processed and stored either manually or in a storage, transmission and data processing device 88, and may be retransmitted to or collected directly from a data processing and storage device 90.

The system described here provides the necessary data to accurately compare the read energy at one or more end points and, accordingly, the electricity delivered to it at one or more start points for the same period of time. Thus, according to the method created for this purpose, the reporting, detection of sources and optimization of linear losses caused by thefts and / or faulty equipment, if any, are achieved.

As shown in FIG. 5 according to the method, 150 are currently measured and statistics of the measured for the previous periods are total and by separate tariff zones delivered through a support point of electricity, and total and by tariff zones delivered electricity by separate phase cables. According to the method, 152 are measured on an ongoing basis and statistics for the past periods and the electricity consumed in total and by tariff zones from individual consumers to the given anchorage point. According to the method, 154 are currently calculated and statistics for the past periods of the amount of electricity consumed by all consumers supplied by the respective support point, total and by tariff zones. According to the method, 156 is currently calculated and statistics of the amounts of electricity from all consumers supplied through the same phase of a given power point, total and by tariffs in zones. According to the method, the current 15 calculations of the ratio of horse / ration of each individual consumer, total yoke tariffs, to the supplied electricity, total and tariff zones, through its respective support point, as well as the ratio of consumption of each individual consumer, total and by tariff zones, electricity supplied, total and tariff zones through the respective fa sa of the same stronghold.

According to the method it is calculated from consumed and water losses are optimally measured25 technical op: proceed to the corresponding time report of the comparison of 168 past peri40s the difference 160 between the electricity delivered over the reference point and the sum of the reported total consumption of all consumers, powered through the same anchorage.

According to the method, at a difference of 162 between the latter, within the limits of competitive losses, it is assumed that the energy is dormant and proceeds to the next period.

In case of greater difference than the difference 164 between the total reported energy at the consumer points and the total electricity supplied to them through the support road, according to the method, the comparison 166 of the delivered and received electricity by tariff zones and by phase cables for the purpose of establishing frame and limit the circle of loss indicators. It is performed between the data from the current and the data on the ratio of consumption of individual consumers, total and by tariff zones, to consumption through feeders) by tariff zones, as well as to consumption, total and tariff zones, in their respective phases. In the event of a change in the consumption of some consumers, the latter are identified as probable “leakage points”. According to the method, these points are thoroughly inspected, and the measures may include placing a control ele- ment on the current one, etc. technical irregularities 170.

If the comparative analysis points to a point, generally and in relation to the romer, the inspector shall remove the target4.

65631 The exact ratio of single reported consumer data, total and tariff zones, to the electricity supplied, total and tariff zones through the feeder node, and total and tariff zones for the respective phase conductor, the probability of losses due to a faulty consumer electrometer or theft, is significantly smaller and follows the inspection of technical equipment along the route in order to eliminate technical irregularities 170. In practical terms, the latter is a reaction to technical losses, since with a constant consumer attitude this consumption of the energy supplied should be considered as technically justified.

Claims (17)

Claims 1. An electrical energy metering and reporting system in a low-voltage power grid that has at least one support / supply point connected via one or more supply lines to one or more supply units consisting of one or more central electricity meters / meters located at the power points and one or more of the electricity meters / meters respectively located at the delivery units, characterized in that but or more devices for time recording electricity consumption associated with electricity meters and recorded simultaneously measured data on energy consumption during the meter. System according to claim 1, characterized in that each electricity meter and time consuming data recording device for the consumed electricity have their own identifiers. System according to claim 2, characterized in that the time recording devices register data from several meters of electricity / meter. A system according to claim 2, characterized in that the time recording devices for consumed electricity or their separate parts are intellectually embedded in the metering structure A system according to any one of the preceding claims, characterized. that the time consuming data recording devices are designed and configured to record the consumed electricity for a specified, pre-programmable, cyclic time period. repeating n A system according to any one of claims 1 to 4, characterized in that the time consuming data recording swings for the consumed electricity are designed and configured to record the current data for the consumed electrically determined, pre-programmable, cyclically recurring torque. energy to [and through our device- System according to claim 1, characterized in that the time recording devices from the central power meter / meter and the plurality of power meters (meters) at the delivery nodes provide the registered tax visualization. A system according to claim 1, characterized in that it contains one or more data processing and storage devices, the recorded data for temporal data logging being processed and stored at one or more operator points. System according to claim 8, characterized in that it further comprises one or more intermediate devices for transferring and / or storing and transmitting data to the processing and storage device ia the data, such as the recorded data from the device: the time logging device data are processed and stored at intermediate points and the processing and data device. A system according to claim 8 or 9, characterized in that the time recording devices from the central electricity meter / meter and from the plurality of electricity meters / meters at the supplying units provide the recorded data to the exchange devices until storage of 65631 Bl operation and / or storage and / or transmission of data via optical and / or radio frequency and / or wired paths. 11. A method for recording, detecting and optimizing energy losses in a low voltage power grid having at least one power supply point connected by a plurality of power lines to one or more supply units, characterized in that the electricity delivered through a support (power) node over a specified period of time is measured; and the electricity consumed through each delivery unit delivered to it at the reference point for the same period is measured; and the amount of electricity measured is calculated across all delivery nodes connected to the respective anchorage point; and the measured and calculated energies are compared. Method according to claim 11, characterized in that the measurement is performed by recording the current readings of the electricity meters / meters at a precise, cyclic recurring moment, the same for all meters / meters and calculating the difference between the latter and previous recorded readings. Method according to claim 11, characterized in that the measurement is performed by recording the consumption through the reference point (s) and delivery unit (s) for one. us and in phases. . of the measured nodes, total> m energy, the same fixed period of time 14. A method according to claim 11, characterized in that it comprises recording the phases in which the individual electricity meters / meters at delivery units are arranged, measuring and comparing both the total energy and the energy at tariff rate] 15. The method of claim 14, wherein the ratio of each energy reported during deliveries and by tariff zones is calculated for the period traveled to them through the reference line in total, by tariff zones and by phase. 16. A method according to any one of 11 to 15, characterized by 'historical statistics'; measurements and calculations. A method according to claim 16, characterized in that one or more electricity meters / meters at delivery nodes that have experienced a change in the ratio of delivered ha through them to the energy supplied to them through the reference point and to the delivered one energy in their phases, different from the same relationships in the previous reporting period! and). . of claims from the gov that the records are kept