UA146837U - DEVICE FOR DETERMINATION OF A SECTION OF ELECTRICAL NETWORK WITH UNAUTHORIZED CONNECTION OF ELECTRIC RECEIVERS - Google Patents

Abstract

The device for determining the area of the electrical network with unauthorized connection of electrical receivers contains the main unit with current sensor and GPS antenna, which includes a matching device, analog-to-digital converter, the first converter "CODE-USB signal", data processing unit, GPS-receiver, selector time signal receiver, radio signal transceiver, second converter "CODE-USB signal" and additional units with current sensor and GPS antenna, which include a matching device, analog-to-digital converter, radio signal transceiver, memory unit, GPS -receiver, time signal selector, comparison scheme, time settings storage unit. In this case, the main and additional blocks additionally introduced blocks for determining the current multiplicity and data shift registers, and the main block is supplemented by a block for setting time settings.

Description

The useful model belongs to control and measurement equipment and is intended for control of electricity accounting and also for determining the fact of unauthorized connection of power receivers on the controlled section of the power supply network.

A known electricity metering control device containing series-connected current and voltage sensors that are connected to the inputs of an analog signal multiplier, as well as an optical sensor, two rectangular pulse counters, a rectangular pulse generator, a timer, a comparison unit, an output unit, and a switching device. (Patent of Ukraine Mo 12568 s01K21/133. Device for controlling electricity accounting by F.P. LShkrabets and others - Byul. Mo 2, 2006).

Disadvantage: insufficient control of unauthorized connection.

A device for controlling electricity consumption on a network section is also known, which consists of the main and additional units for controlling the values of the electric load current at characteristic points of the electric network with the possibility of processing the results of simultaneous measurements while maintaining the balance of the load currents, and due to this, there is an opportunity to control the electricity consumption in the number and determination of the fact of unauthorized connection of electrical receivers to the power supply network (Patent

of Ukraine for utility model Mo 24136, IPC 001/K21/133. The device for controlling electricity consumption in the network section / Shkrabets F.P., Vyshnya V.B., Myroshnychenko V.O., Krasovskyi

P.Yu. - Bull. May 9, 2007).

Disadvantages: the current in the electrical network with a large number of branches changes very dynamically, and the accuracy of controlling the consumption of electrical energy in the above device largely depends on the simultaneous fixation of current values by the main and additional units. In turn, the moment of fixing the current values is determined by the moment of receiving the gating signal, which is formed by the main and additional blocks. Given that the transmission of all signals in the electrical network between the main and additional units occurs only sequentially, all additional units receive gating signals not simultaneously, but with a time delay, which leads to an error in the calculation of the current balance and a decrease in the accuracy of power consumption control and , accordingly, reducing the accuracy of determining the section of the electrical network with unauthorized connection of electrical receivers.

З The closest analogue of the claimed utility model is a device for controlling electricity consumption, which consists of a main unit that fixes the current at the beginning of the controlled section, and additional units that fix currents at the end of the controlled section of the electrical network, as well as in each branches from the controlled section of the network with subsequent calculation of the balance of currents in the controlled section of the electrical network. To perform the functions assigned to the device, the main and additional blocks contain matching devices, analog-to-digital converters (ADC), the first "CODE-SH.5V signal" converter, data processing unit, OP5 receivers, time signal selectors, time setting storage unit, memory unit, receiver-transmitter of radio signals, a comparison circuit and the second "CODE-O5V signal" converter, as well as connected to the main and additional units of the SRZ-antennas and current sensors (Patent of Ukraine for a utility model Mo 74647, c01K21/133. Device control of electricity consumption in branched networks / Vyshnya

V.B., Myroshnychenko V.O., Storozhko S.V. - Bull. May 21, 2012).

Disadvantages: the vast majority of power supply lines have a branched nature, to which a significant number of electricity consumers are connected, which have a significant dynamic nature of load fluctuations. This causes significant fluctuations in the current, the dynamics of which changes are random. As a current sensor, the closest analogue uses a current transformer, in which the amplitude (current) error depends on the ratio (multiplicity) of the primary and nominal value of the currents through the transformer, which is illustrated in the table below. 1. (NATIONAL STANDARD OF UKRAINE TRANSFORMERS

MEASURING. Part 1. Current transformers EC 60044-1:2003, IUT) DSTU IES 60044-1:2008 Official edition. Kitv STATE CONSUMER STANDARD OF UKRAINE 2010).

Table 1

Class of current accuracy, zh nyny ny shin shin shin g py ny t pi

The consequence of significant current fluctuations in the electrical network is the insufficient accuracy of current balance calculations due to errors in the measurement of branch currents by current sensors, which are part of all additional and main units, and, accordingly, the insufficient accuracy of determining the fact of unauthorized connection of electrical receivers in the controlled section of the electrical network. The largest measurement error will be in the case of minimum currents in individual branches of the electrical network and at the entrance of the controlled section (see Table 1).

The basis of the useful model is the task of increasing the accuracy of control of electricity consumption and the accuracy of determining the section of the electrical network with unauthorized connection of electrical receivers by selecting the results of current measurements by current sensors with the smallest error and further calculating the balance of currents in the controlled section of the electrical network based on the current values selected in this way.

The task is solved by the well-known device for controlling electricity consumption, which contains a main unit with a current sensor connected to it and an ORZ antenna, which includes a matching device, an analog-to-digital converter (ADC), the first converter "CODE-O5V signal ", data processing unit, CP5 receiver, time signal selector, receiver-transmitter of radio signals, second converter "CODE-O5V signal" and additional units with a current sensor and CP antenna connected to them, which include a matching device, ADC, receiver-transmitter of radio signals, memory unit,

SRBZ receiver, time signal selector, comparison circuit, time setting storage block, according to the useful model, current multiplicity determination blocks and data shift registers are introduced into the main and additional blocks, and the main block is supplemented with a time setting setting block, and in the main and additional blocks blocks, the current sensors are connected to the current multiplicity determination blocks and further to the first input of the data shift register, the second input of which is connected to the ADC output of the current sensor signal, the third input of the data shift register in the main block is connected to the output of the time setting block, and in additional blocks - with the output of the comparison circuit, while the output of the data shift registers in the additional blocks is connected to the input of the data storage block, in the main block - through the "CODE-O5V signal" converter

Zo is connected to the input of the data processing unit, where the cycle current balance is calculated with the smallest calculation error.

Fig. 1 shows the connection diagram of the main and additional blocks to the controlled section of the electrical network A-B for calculating the balance of currents:

Ios - UYidod where: os - the value of the load current at the input of the controlled section A-B of the electrical network, which is fixed by the main unit 6; DOD the value of the load current, which is fixed by each additional unit 8 in all branches of the controlled section A-B.

The connection scheme includes: the main unit b and additional units 8, to which current sensors 9 and ORZ-antennas 11 are connected. Additional units 8 are connected on all branches of the site

A-B of the electrical network, on which the consumption of electricity is monitored, and the main unit 6 - at the beginning of the controlled section of the electrical network from the side of the power source.

In fig. 2 shows the functional diagram of the main unit, and Fig. A functional diagram of the additional block is presented.

The device includes the following functional blocks: 1 - matching device; 2 - analog-to-digital converter; C - the first "CODE-REV signal" converter; 4 - data processing unit; 5 - receiver-transmitter of radio signals; b - main unit; 7 - memory unit; 8 - additional block; 9 - current sensor (transformer); 10-(4RO-receiver; 11-2RB5-antenna; 12 - time setting storage unit; 13 - comparison circuit; 14 - time signal selector; 15 - second "CODE-O5V signal" converter; 16 - current multiplicity determination unit; 17 - data shift register, 18 - block for setting time settings.

The operation of the main unit 6 (Fig. 2) of the proposed device is carried out in the following way: a signal proportional to the load current at the beginning of the controlled section of the A-B network from the output of the current sensor 9 enters the input of the matching device 1, which converts it into a voltage signal and supplies it to the input of ADC 2, which forms the value of the load current in the form of a digital code. From the output of the ADC 2, the numerical code is sent to the second input of the data shift register 17. The first input of the data shift register 17 receives information about the accuracy of the current measurement from the output of the unit 16 for determining the multiplicity of the actual current to the nominal current of the transformer (sensor) 9, and the third input of the register of the data shift 17, the "strobe" of data recording arrives at a strictly defined moment, coinciding with the moment of data recording in the data shift registers 17 of all additional blocks 8. After a complete cycle of data recording in the data shift register 17 of the main block 6, data containing information about the current value and the accuracy of its measurement with reference to time, are converted by the first converter "CODE-O5V signal" and are sent to the first input of the data processing unit 4. The second input of the data processing unit 4 receives information about the value of the current and the accuracy of its measurement from the in time from all additional units 8 installed on the controlled section of the A-B network. The data processing unit 4 selects for the calculation of the current balance exactly that cycle of measurement of the current values recorded by the main and additional units at the same time, which are measured by the current transformers (sensors) 9 of the main unit 6 and additional units 8 with a minimum error. The block for setting time settings 18 determines the moments of formation of the "gate" of data recording in the data shift registers 17 of the main b and additional blocks 8 (synchronizes the moments of data recording). The time of formation of the "gate" is determined in the unit for setting the time settings 18, and the simultaneity of its formation in the main unit b and additional units 8 is ensured by the signal from the CP5 satellites, which is received by the CP5 antenna 11, enters the input of the OP5 receiver 10 and after the selection of the signal of the exact of time from the full SPO signal by the time signal selector 14 is sent to the input of the time setting block 18. To ensure the simultaneity of the formation of the "strobe" signal of data recording in the data shift register 17 of the additional blocks 8, information about the specified moments of the formation of the "strobe" signal from the output of the block setting the time settings 18 is received at the input of the receiver-transmitter of radio signals 5 of the main unit 6 and is transmitted by radio ether to all additional units 8. Information about the value of the currents in each cycle of measurements, the accuracy of measurements

From the current and time measurements from each additional unit 8 is also transmitted by radio air, received by the receiver-transmitter of radio signals 5 of the main unit 6, enters the input of the second converter "CODE-O5V signal" 15, and from its output - to the second input of the data processing unit 4.

The operation of additional units 8 (Fig. 3), which are installed on each branch of the controlled section A-B of the power supply network, is as follows: the value of the load current is fixed by the current transformer (sensor) 9, enters the input of the matching device 1, is converted by the ADC 2 into a digital code and enters the second input of the data shift register 17, the first input of which receives information about the accuracy of the current measurement from the output of the unit for determining the multiplicity 16 of the actual load current to the nominal current of the current transformer (sensor) 9. The third input of the data shift register 17 receives a "strobe " of data recording from the output of the comparison circuit 13. The "strobe" of data recording is formed by the comparison circuit 13 at the moment of coincidence of the signals from the output of the time setting storage unit 12 and the output of the time signal selector 14. This is carried out simultaneously in time in the main 6 and all additional units 8. The moments of formation of the "strobe" of data recording in the data shift register 17 of the main block are additional x blocks 8 are set by the unit for setting time settings 18 of the main unit 6, are transmitted over the radio channel to additional units 8, where they are received by the receiver-transmitter 5, from the output of which the time settings are sent to the input of the storage unit 12.

After filling the data shift register 17 with current values and information about the accuracy of its measurement with reference to time, this information enters the input of the memory unit 7 and is transmitted to the main unit 6 by means of a signal receiver-transmitter 5 via a radio channel, in which the unit data processing 4 calculates the current balance, selecting from the cycle the value of the currents with the smallest measurement error at the same moment in time. To synchronize the time of formation of "strobes" of data recording in the data shift registers 17 of all additional units 8, they also receive accurate time signals from the SR5 satellites with the help of the SRBZ antenna 11 and the ZRZ receiver 10 connected to its output, the full SRO signal from which enters the input of the time signal selector 14.

After receiving the values of the load current of all control connections, the data processing unit 4 of the main unit 6 determines the balance of the load currents on the A-B section of the electrical network for the corresponding moment of time, taking into account the accuracy of its measurement.

If the balance of the load currents is preserved, a conclusion is drawn that there are no unauthorized connections of consumers on the controlled section of the A-B network, if the balance of the load currents is violated, the unauthorized consumption of electricity is recorded.

Thus, the proposed technical solution makes it possible to increase the accuracy of calculating the balance of currents in the controlled section of the electrical network and, accordingly, to increase the accuracy of detecting the fact of theft of electrical energy by unauthorized connection of electrical consumers.

Claims (1)

USEFUL MODEL FORMULA The device for determining the area of the electrical network with unauthorized connection of electrical receivers, which contains the main unit with a current sensor and a CP5Z antenna, which includes a matching device, an analog-to-digital converter, the first "CODE-O5V signal" converter, a data processing unit, SRb-receiver, time signal selector, receiver-transmitter of radio signals, second converter "CODE-O5V signal" and additional blocks with a current sensor and SRbZ-antenna, which include a matching device, analog-to-digital converter, receiver-transmitter of radio signals, block memory, ОР5З - receiver, time signal selector, comparison circuit, time setting storage block, which differs in that the main and additional blocks additionally include current multiplicity determination blocks and data shift registers, and the main block is supplemented with a time setting setting block , and the input of the units for determining the current multiplicity is connected to the current sensor, and the output is connected to the first input of the data shift register, the second input of which is connected to the output of the analog-to-digital converter, and the third input of the data shift register in the main block is connected to the output of the time setting block, the input of which is connected to the output of the time signal selector, and in additional blocks - to by the output of the comparison circuit, while the output of the data shift register in the additional blocks is connected to the input of the memory block, and in the main block - through the first converter "CODE-O5B signal" is connected to the input of the data processing block, where the cycle current balance is calculated with the smallest calculation error. p ihr ro et shi nyny because o- 7 N Derz sheath seni rn that h. I N t N i I I She : GO | ! ! shi | ши ны ше Х x Tellyatyunti y : i ' t I ! | I IN her- r Fig. 1 and | and I shen I ---Iikh --t : 1-4 R: SHT more | | ! | i - nt k-zh UZN and sha pry ti B GG: MY p She ro shk now : : kin - x | nina | ! Fig. 2