SU1429219A1 - Arrangement for controlling electric power consumption by industrial plant - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to simplify the device. The device performs the functions of polling the power consumption sensors 1, .. o, 1 and the controllers jBo of technological process sensors 2, .., 2. In the operative memory of the decision unit 4, information about the state of each of the sensors is stored. According to the signals of the sensors of technological processes 2, ..., 2 and according to the algorithm specified by the program block 5, the generation of control actions is performed, which provide off-peak rega - and (L

Description

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press work of consumers. The signals developed in the decision block 4 are fed to the control unit of the consumer controllers 9, to the corresponding automation schemes and controllers. During the hours of maxima of the loads of the power system, the power consumption is automatically controlled, ensuring the fulfillment of the specified limits. The presence in the device of data receiving and transmitting units makes it possible to create local networks of interacting

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devices, which allows real-time redistribution of power consumption limits between devices. Simplification is achieved as a result of executing the data receiving and transmitting unit as transceiver 10, programmable interval timer P, address decoder 12, transmitting keys 14-17, low-pass filters 19, 26, symmetric differential amplifier 20, comparators 21-22, RS flip-flop 24, the detector 25 and the element 2 and 27. Il.

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i The invention relates to electric power industry, in particular to devices for monitoring and control of electric power consumption.

The purpose of the invention is to simplify the design of the device.

The drawing shows a block diagram of a device for controlling power consumption of an enterprise.

The device contains 1–1 flow meters. Electricity and sensors; 2, 2 technological processes, which are connected to the formation receiving unit 3 connected to the decision block 4o. The decision block 4 is connected to the program block 5 and the matching block 6 connected to a display and alarm unit 7, a control panel 8, and a consumer control unit 9. Solving unit 4 is also connected to the transceiver. 10, the programmable interval timer 11 and the address decoder 12, the output of which is connected to the transceiver and the programmable interval timer 11, the output of which is connected to the synchronization input of the transceiver 10, the transmitter output of the transceiver 10 is connected to the input of the inverter 13 m to the first control input of the transducer 13 transmission key 14, the output of which is connected with the output of the second transmission key 15 and the first wire of the communication line, the second wire of which is connected to the interconnected outputs of the third 16 and fourth 17th gear key to the first manager

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the input of the third key 16 is connected to the transmitter output of the transceiver 10, to the first control inputs of the second 15 and fourth 17 transmit keys - the output of the inverter 13, to the second control inputs of the first 14, second 15, third 16 and fourth 17 transmit keys - output the transceiver 10. The line 18 is connected to the inputs of the first low-pass filter 19, the outputs of which are connected to the inputs of a symmetric differential amplifier 20, the output of which is connected to the first inputs of the first 21 and second 22 comparators, to the other inputs of which the output of the sensor 23 of the reference voltage is connected

e The outputs of the first 21 and second 22 comparators are connected to the inputs of the TlS flip-flop 24 and to the inputs of the detector 25, the output of which is connected to the input of the second low-pass filter 26,

5 the output of which is connected to the input of the request of the transmitter of the terminal of the transceiver - 10 and to the first input of the element 2И 27, the second input of which is connected to the output of the RS flip-flop 24. The output of the element 2 AND 27 is connected to the input of the receiver of the transceiver 10 the composition of the node is 28 liriem and data transmission,

The device works as follows

Each sensor 1, q of consumption, of electricity enters a pulse corresponding to a certain amount

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energy. The energy weight of a pulse is determined by the current transformer and voltage transformer ratios.

Each sensor 2 - 2 of technological processes carries information about the state of the consumer of electrical energy (for example, the consumer is on or off, empty or filled with a buaker, etc.).

Information from sensors 1 ;, - 1, power consumption and sensors 2, - 2c of technological processes through block 3 receiving information is sent to decision block A, where it is processed in accordance with the algorithm specified by program block 5. According to the algorithm specified by program block 5, the decisive block 4 maintains a program timer and a calendar with the development of time marks. End of second, End of minute, End of half hour, End of hour, End of day, End of month.

 According to the signals of sensors 2, 2, technological processes, developed time stamps and according to the algorithm set by software block 5, control signals are developed that provide off-peak operation of the repeaters, as well as the forced inclusion of consumer data in periods of technological load dips ( - it is a technological process of the enterprise). The control signals developed in the decision block 4 through the matching block 6 are fed to the user control unit 9 by the controllers and then to the corresponding users of the automation circuit, controllers and switching devices.

The data from sensors 1, - 1, power consumption, in resolving unit 4 are multiplied by the coefficients stored in the program block corresponding to a certain price of input pulses.

The resulting data is summarized with previously accumulated information. The cells of the RAM of the decision block 4 store information on the power consumption for each channel for specified periods of time. In addition, the input data is grouped into groups, taking into account the sign (consume & or energy supplied according to the signs stored in the software

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block. Grouped information about the power consumption is stored in RAM for time cycles specified by the input data processing algorithm.

During periods of maximum load of the power system, data on the combined thirty-minute power is generated, and the power consumption is predicted for the end of the monitored thirty-minute interval.

If the predicted value of power consumption exceeds a predetermined value, then decision block 4 generates a control signal to consumers-regulators through matching unit 6 and through consumer controllers control unit 9 to reduce power consumption to a predetermined level. The choice of consumers-regulators is made taking into account their state, information about which is received from sensors 2 - 2 technological processes, and taking into account their predetermined priority or on the basis of minimizing the damage from the disconnection of certain consumer-regulators.

Information about the expected excess of the set values of power consumption also goes to the display and signaling unit 7.

For on-line input into the RAM of the decision block 4 set values, periods of maximum load of power systems, as well as to call information to the display, use the console 8.

Information transfer mode.

The solver unit 4 prepares the transceiver 10 and the programmable interval timer 11 for operation via the address decoder 12. According to the algorithm specified in the program block 5, the decision block 4 performs programming of the transceiver 10 and the programmable interval timer 11 for the selected operation mode.

The decision block 4, through the transceiver 10, checks the occupancy of the communication line 18 (the output of the second low-pass filter 26). If the communication line is free, the decision block 4 switches the transceiver 10 to the information transfer mode, as a result, the output signal is the Request of the receiver of the terminal of the transceiver 10 de 5

the first 14, second 15, third 16 and fourth 17 transmit keys are blocked.

The format of the transmitted data is recorded in program block 5. Decision block A records in a parallel code data of a given format in transceiver sensor 10. As a result, at the output of pempereterer 10 with a frequency specified by a programmable interval timeout H, a start-bit form and a serial stream . characters, at the end of which a stop bit is formed. If a logical 1 signal is transmitted, then this signal from the transmitter output of transceiver 10 opens the first 14 and third 16 transmitting keys, thus ensuring the passage of a current signal of a given polarity along the 18 line. If a logical O signal is transmitted, then the second 15 and fourth 17 transmit keys are opened through the inverter 13, ensuring that a signal of the opposite polarity passes on the communication line 18. In this way, information is transmitted by direct current signals, and the transmitted signals of logical 1 correspond to the signals of direct current of one polarity, and the transmitted signals of logical o correspond to the opposite polarity.

After transmitting a specified amount of information, which is determined by the algorithm recorded in program block 5, decision block 4 switches the transceiver 10 to receive information.

The mode of receiving information.

The driving unit 4, through the transceiver 10, controls the occupation of the communication line 18. If there is no signal of either polarity on line 18, then there is also no signal at the output of the symmetric differential amplifier 20. The outputs of the first 21 and second 22 comparators contain logical signals O and, therefore, the outputs of the detector 25 and the second low-pass filter 26 and at the input Transmitter terminal transmitter request 10 receive logical O signals. Decision unit 4 receives information about that line is free.

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If there are current parcels in the communication line 18, the state of the symmetric differential is changed, the amplifier 20 has a positive or negative output signal, depending on the signals of the communication line). Therefore, either the first 21 or the second 22 comparator is triggered. At the output of the detector 25, a signal appears that passes through the second low-pass filter 26, unlocks element 2I 27 and informs the decision block 4 through the transceiver 10 about the presence of signals in the communication line 18. In addition, the signals from the comparators (first or second) switch the RS-flip-flop 24, resulting in the output of element 2I 27 a signal corresponding to the transmitted signal appears. The signal from the output of element 2I 27 is fed to the receiver input of the transceiver 10 and further to the decision unit 4 for further processing.

Claims (1)

Invention Formula A device for controlling the power consumption of an enterprise, containing an information receiving unit, connected to the input signal buses and to the solver a common unit that is associated with a software unit and a matching unit, the outputs of which are connected to the inputs of the consumer controllers control unit, and also increased the reception and transmission of data, including the transceiver connected to the decision unit, and the low-pass filter and, in order to simplify the design of the device, an address decoder, programmable interval timer, inverter, first, second, third and fourth transmitters, keys, symmetric differential amplifier, reference voltage sensor, first and second comparators, RS trigger, element 2I, detector and second low-pass filter, the address decoder being connected to the decision unit, transceiver and programmable interval timer, which is associated with the synchronization input of the transceiver, the transmitter output of which is connected to the first control inputs of the first and third transmitting keys and to the inverter. the output of which is connected to the first control inputs of the second and fourth transmission keys, to the second control inputs of the first, second, third and fourth transmission keys is connected to the output of the receiver's request of the transceiver terminal, the outputs of the first and second transmitters are interconnected and connected to the first wire the communication line, to the second wire of which the interconnected outputs of the third and fourth transmitting keys are connected, to the communication line are also connected the inputs of the first low-pass filter, the outputs of which are dklyucheny to inputs symmetric differential amplifier whose output is connected to the first inputs of the first n second comparators, to the other inputs of which the output of the voltage sensor is connected, the outputs of the first and second comparators are connected to the inputs of the RS flip-flop and the inputs of the detector, the output of which is connected to the input of the second lower filter frequency, the output of which is connected to the input of the request of the transmitter of the terminal of the transceiver and to the first input of the element 2I, to the second input of which is connected the code -K5-flip-flop, and the output of the element 2I is connected to input dy transceiver.