Method for determining power consumption in electric installation and alternating current electric installation

FIELD: measurement technology.

SUBSTANCE: invention relates to electrical measurements. According to present invention, a group including a plurality of individual distribution branches connected in parallel is connected to an alternating-current power supply. Method includes following steps of: a) detection of a change in electrical consumption of one specific branch among the branches, and b) determination of individual power consumption of specific branch, based on a measurement of total voltage (U), which is substantially constant during change, measurements of intensity (IA, IB, ψA, ψB) and phase shift values of total current before and after change, and measurement of intensity (I3A, I3B) of individual current in a specific branch before and after change.

EFFECT: technical result consists in simplifying measurements.

9 cl, 6 dwg

 



 

Same patents:

FIELD: measurement equipment.

SUBSTANCE: invention relates to measurement equipment, in particular, to methods of energy accounting. The device realising the method of energy measurement, comprises analogue bandpass filters of voltages and currents of 50 Hz, analogue bandpass filters of a "plug" type of 50 Hz voltages and currents, analogue-digital converters, digital bandpass filters of voltages and currents of 50 Hz, digital bandpass filters of the "plug" type and 50 Hz voltages and currents, digital filters of voltages and currents of zero-phase, positive-phase and negative-phase sequences, accordingly, units of power calculation by zero-phase, positive-phase and negative-phase sequences, a unit of comparison of the voltage deviation by the positive-phase sequence, units of energy calculation of zero-phase, positive-phase and negative-phase sequences, a unit of higher harmonics power calculation, a unit of higher harmonics energy calculation, shapers of modulating codes, delay lines, a summator, a clock pulse oscillator, a phase manipulator, a power amplifier and a transmitting antenna. A control station comprises a receiving antenna, a high frequency amplifier, a search unit, a heterodyne, a mixer, an intermediate frequency amplifier, a detector (selector), spectrum analysers, a phase doubler, a comparison unit, a threshold unit, a delay line, narrow-band filters, a phase divider-by-two, a phase detector, a unit of registration and analysis.

EFFECT: expansion of functional capabilities due to the provision of remote control of energy by six parameters of quality.

3 dwg

Digital power meter // 2533746

FIELD: electricity.

SUBSTANCE: invention is related to electric engineering and may be used in different devices of electric power systems. The digital power meter includes an electric receiver and a binary counter, which counting input is coupled to conjunctor output coupled to by its first input to the generator output controlled by voltage and the reset input is coupled to output of the synchronisation pulse generator coupled by its inputs to the input terminals of the mains. In order to reach technical result the current-to-voltage converter is introduced and coupled by input terminals between the second terminal of the mains and the second clamp of the electric receiver, the first comparator is coupled by its subtracting input to sawtooth voltage output of the generator and by its summing input to the output of the current-to-voltage converter and by output to the second input of the conjunctor, and the second and third comparators are coupled by its summing inputs respectively to the output of the current-to-voltage converter and to the first terminal of the mains and by its subtracting inputs to the second terminal of the mains and by its outputs to inputs of the logic equivalency circuit, which output is coupled to the third input of the conjunctor, as well there is an additional binary counter, the logic equivalency circuit and an additional conjunctor, which output is connected to the counting input of the additional binary counter, the first input is coupled to output of the first comparator, the second input is coupled to output of the generator controlled by voltage and the third input is coupled to the logic equivalency circuit, at that the reset input of the additional binary counter is coupled to output of the synchronising pulse generator.

EFFECT: reduction of measurement error in circuits with reactive power.

2 cl, 3 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to pulse processing, particularly, to defining power efficiency at spark surface doping unit. Proposed method comprises recording all electric pulses during basic time interval to define quantity NΣ total power EΣ of all recorded pulses. Recorded pulses are rated to operating pulses with pulse power making not lower than 20% of maximum recorded power and low-power pulses not exceeding 20% of maximum recorded pulse power. Quantity Np and total power Ep of working pulses are defined. Thereafter, factor of efficiency of working pulse generation of the plant SN=Np/NΣ and power factor of using said factor of efficiency SE=Ep/EΣ of surface doping are defined to estimate efficiency of spark doping plant.

EFFECT: perfected determination process.

3 cl, 9 dwg, 1 ex

FIELD: physics.

SUBSTANCE: method is based on billing electrical power, identified by its quality factor, specifically electrical power on a reverse sequence, electrical power on a zero sequence, electrical power of high harmonics, electrical power of a direct sequence below allowable values of voltage deviation of the direct sequence, electrical power of a direct sequence higher than the rated values of deviation of voltage of the direct sequence and electrical power of the direct sequence in the range of allowable voltage deviation values.

EFFECT: high accuracy of billing and controlling electrical power consumption, identified from the quality factor.

1 dwg

FIELD: electricity.

SUBSTANCE: electric power measurement device comprises the following components: facilities to transform voltage into current in silicic micromechanical element, which is in power interaction with conductor; facilities to determine force of interaction between silicic micromechanical element and conductor. Force of interaction is directly proportional to product of voltage and current. The feature of proposed method for measurement of electric power is the fact that voltage is transformed into current in silicic micromechanical element, which is in power interaction with conductor. Force of interaction between silicic micromechanical element and conductor is determined.

EFFECT: simplified measurement of electric power.

22 cl, 6 dwg

FIELD: physics.

SUBSTANCE: device includes the following: a measuring voltage transformer, a measuring current transformer, two multipliers, a unit for determining reactor power behaviour, a half-wave rectifier and a phase-shifting device.

EFFECT: simple design of the device for measuring reactive power owing to fewer switches.

2 cl, 5 dwg

FIELD: electrical measuring.

SUBSTANCE: method intends for measurement of active power extracted at load of ac electric circuit. Method is based onto transformation of instant power consumed by load into variable electric voltage to be proportional to the power. Pulsing voltages with different polarities are extracted from formed electric voltage. When smoothing pulsations in both voltages, the voltages are transformed into permanent heteropolar voltages being equal in value to peak values of pulsing voltages. Constant homopolar voltages are subject to summing and result of summation is measured by dc voltmeter, graduated in power units.

EFFECT: simplified procedure of measurement of active power due to reduction in number of realizing procedures; high precision of measurement.

2 dwg

FIELD: measuring equipment engineering, possible use in systems for compensation of reactive power.

SUBSTANCE: for achievement of effect, reactive power meter additionally includes block for determining type of reactive power. Signal inputs of block for determining type of reactive power are connected to outputs of block for selecting constant component of reactive power signal, one of controlling inputs is connected directly to output winding of measuring voltage transformer, and other ones - to output winding of measuring voltage transformer through shifting device. Block for determining character of reactive power contains inverter of signal and switching keys, which depending on polarity of control voltages connect output of block for determining type of reactive power to its input either directly or through signal inverter.

EFFECT: increased precision of measurements.

3 cl, 6 dwg

FIELD: electric supply engineering, possible use in electric networks for checking serviceability and precision of measurements of panel for counting electric power.

SUBSTANCE: in accordance to proposed method during certain time, during which load remained unchanged, number of rotations of counter disk is counted, phase currents are measured, voltages, cosφ or power, consumed in each phase. On basis of received values its total sum is calculated, and also electric energy is determined, counted by counter, on basis of technical speed of the latter. These connected are compared and on basis of received data serviceability of panel is evaluated.

EFFECT: decreased of number and simplification of operations performed during control of panel for counting delivered electric energy.

FIELD: railway transport; power supply of railway vehicles.

SUBSTANCE: in chosen section of ac traction system currents and voltages are synchronously measured on each feeder of contact system of each traction substation and on electric locomotives, and measured parameters are recorded at rate from 0.1 to 1 minute. Then power consumptions in traction substations and in electric locomotives are calculated and recorded at the same rate. Power consumption values, thus found on traction substations and on electric locomotives, are transmitted to data acquisition and processing device by means of which power consumed at traction substations within the limits of chosen track section and in electric locomotives moving over this section are calculated. Power losses in traction system of chosen track section are determined as difference between power consumption in traction substations and in electric locomotives.

EFFECT: increased accuracy in determination of power losses.

2 dwg

FIELD: public service measuring engineering.

SUBSTANCE: system has central concentrator connected with the intermediate concentrator. The electricity meters are connected through the concentrators. Each of the meters has current pickup, voltage pickup, pickups of flow rate of hot water, cold water, and gas as well as control unit and indication unit.

EFFECT: simplified servicing of the arrangement.

1 cl, 4 dwg

FIELD: metering equipment.

SUBSTANCE: system can be used for registration, metering and payment of consumed electric power by different users. System has recording unit being common for all users which unit is placed in power service stations, metering unit located at any user's place at the point where the unit is connected to network and information chart for any user. Recording unit provides recording of data on paid amount of electric power onto user's information chart. Metering unit provides reading information on paid amount of electric power out of user's information chart as well as permanent comparison of consumed and paid amount of electric power and switches the user from electric circuit in case the paid amount is over.

EFFECT: improved comfort, precision and quality of monitoring of electric power consumption.

7 dwg

FIELD: electric engineering.

SUBSTANCE: method includes estimation of quality coefficients of electric energy in electric energy system, determining degree of matching of these coefficients to normal values, forming of control signal for correcting devices and predicting electric energy characteristics expected after effect of these devices. On basis of analysis of predicted characteristics quality coefficients are newly estimated and if necessary control signals for correction devices are formed. Estimation of not only voltage and frequency is provided, but also current. Whole cycle is repeated for each node of electric energy system.

EFFECT: higher efficiency.

1 dwg

Watt-hour meter // 2252424

FIELD: electric instrument engineering.

SUBSTANCE: meter has phase wire current-to-voltage converter, phase wire power-to-frequency converter, zero wire power-to-frequency converter, indication unit and power source. Two magnetically-connected LC circuits are used for galvanic decoupling voltage and current circuits of meter.

EFFECT: reduced phase error of meter; reduced self-consumption of meter.

2 cl, 1 dwg

Electricity meter // 2254582

FIELD: electric measurement engineering.

SUBSTANCE: electricity meter can be used for measuring electric energy in ac circuits. Electricity meter has current detector, current by voltage multiplier, current-to-pulse frequency converter, current transformer provided with two primary windings and rectifier. One primary winding of transformer is connected with phase conductor of measuring circuit, and the other winding - with one zero conductor and with one secondary winding at which winding the signal is proportional to difference in currents of primary windings. Outputs of transformer are connected with current-to-pulse frequency converter through rectifier.

EFFECT: protection against burglary.

1 dwg

FIELD: electric engineering.

SUBSTANCE: method includes in plants with asynchronous electric engine, forming and storing of standard values of parameters of electric energy and parameters of working body or working process, measuring their current values and comparing current and stored standard values with following indication and/or stored result of comparison as saved electric energy.

EFFECT: better control, higher efficiency.

2 cl, 1 dwg

FIELD: railway transport; power supply of railway vehicles.

SUBSTANCE: in chosen section of ac traction system currents and voltages are synchronously measured on each feeder of contact system of each traction substation and on electric locomotives, and measured parameters are recorded at rate from 0.1 to 1 minute. Then power consumptions in traction substations and in electric locomotives are calculated and recorded at the same rate. Power consumption values, thus found on traction substations and on electric locomotives, are transmitted to data acquisition and processing device by means of which power consumed at traction substations within the limits of chosen track section and in electric locomotives moving over this section are calculated. Power losses in traction system of chosen track section are determined as difference between power consumption in traction substations and in electric locomotives.

EFFECT: increased accuracy in determination of power losses.

2 dwg

FIELD: electric supply engineering, possible use in electric networks for checking serviceability and precision of measurements of panel for counting electric power.

SUBSTANCE: in accordance to proposed method during certain time, during which load remained unchanged, number of rotations of counter disk is counted, phase currents are measured, voltages, cosφ or power, consumed in each phase. On basis of received values its total sum is calculated, and also electric energy is determined, counted by counter, on basis of technical speed of the latter. These connected are compared and on basis of received data serviceability of panel is evaluated.

EFFECT: decreased of number and simplification of operations performed during control of panel for counting delivered electric energy.

FIELD: measuring equipment engineering, possible use in systems for compensation of reactive power.

SUBSTANCE: for achievement of effect, reactive power meter additionally includes block for determining type of reactive power. Signal inputs of block for determining type of reactive power are connected to outputs of block for selecting constant component of reactive power signal, one of controlling inputs is connected directly to output winding of measuring voltage transformer, and other ones - to output winding of measuring voltage transformer through shifting device. Block for determining character of reactive power contains inverter of signal and switching keys, which depending on polarity of control voltages connect output of block for determining type of reactive power to its input either directly or through signal inverter.

EFFECT: increased precision of measurements.

3 cl, 6 dwg

FIELD: electrical measuring.

SUBSTANCE: method intends for measurement of active power extracted at load of ac electric circuit. Method is based onto transformation of instant power consumed by load into variable electric voltage to be proportional to the power. Pulsing voltages with different polarities are extracted from formed electric voltage. When smoothing pulsations in both voltages, the voltages are transformed into permanent heteropolar voltages being equal in value to peak values of pulsing voltages. Constant homopolar voltages are subject to summing and result of summation is measured by dc voltmeter, graduated in power units.

EFFECT: simplified procedure of measurement of active power due to reduction in number of realizing procedures; high precision of measurement.

2 dwg

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