SU1474796A2 - Device for remote control of enterpraise load - Google Patents

Abstract

The invention relates to electric power industry, and allows the management of the electrical load of the enterprise taking into account the magnitude of the claimed maximum active load of the enterprise, while minimizing losses in the distribution network of the enterprise. The purpose of the invention is to reduce energy losses. The apparatus comprises a switch 1 ₁ -1 _N Electricity consumption, accounting unit 2, unit 3 the prediction unit 4 comparing unit 5 jobs decision block 6, the indicating unit 7, the analyzer 8 power losses, the sensor September ₁ -9 _N technological process block 10 CONTROL POWER SUPPLY AND SWITCHES. The introduction of the electric power loss analyzer 8 makes it possible to determine the distribution network line with the greatest losses and single out a consumer-regulator, whose shutdown to equalize the load schedule reduces losses in this line, and also increases the load of the enterprise if necessary, allows determining the line with mi and node switching consumer control. 2 Il.

Description

WITH

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The invention relates to electric power industry, can be used in public enterprises to control the electrical load of an enterprise taking into account the requirements of the power system to maintain a predetermined value of the enterprise active load during the hours of the maximum power system and is an improvement to the auth. No. 805472.

The purpose of the invention is to reduce the loss of energy consumed by the enterprise.

Figure 1 is a block diagram of a device for automatically controlling an electrical load of an enterprise; figure 2 - block diagram of the analyzer - losses.

In Fig. 1, the outputs of the sensors 11-1, the power consumption are connected to the inputs of the accounting unit 2, the outputs of which are connected to the input of the prediction unit 3 and the first input of the comparison unit 4, the output of the prediction block is connected to the second input of the comparison unit 4, to the third input of which is connected the output of the task block 5, which is also connected to the first input of the decision block 6, the output of the comparison block 4 is also connected to the second input of the decision block 6, the first input of the display block 7 and the first input of the power loss analyzer 8, to the inputs of the loss analyzer 8 The output of the decision block 6 and the outputs of sensors 1, - 1.p of the power consumption are also connected, the outputs of the loss analyzer block are connected to the inputs of the decision block 6, the outputs of sensors 9 are connected to the inputs of the decision block 6, the outputs of the decision block 6 are connected To the second input of the display unit 7 and the drive control unit 10 of the switches, the outputs of the timer 11 are connected to the inputs of all units.

In figure 2, the inputs of the counters 12., - 12h energy consumption is connected to the inputs of the sensors 1, - 1 n power consumption, the reset inputs of the counters 12 -) - 12P are connected to the output of the timer 11, the outputs of the counters 12 are connected to the inputs of the registers 13, to the second inputs of which are connected to the output of timer 11, the outputs of registers 13 -, - 13p are connected to the inputs of nodes 14 ,, - 14P of permanent memory, the outputs of which

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connected to the first inputs of the circuits 15, - 15 comparisons, to the second inputs of which the output of the reversing counter 16 is connected, the inputs of which are connected to the output of the decision block 6, and to the outputs of the switch I7, the inputs of the switch 17 are connected to the output of the comparison block 4 and the And 18 element, the first input of which is connected to the generator of 19 clock pulses, and the second to the output of the element OR 20, the outputs of the circuits 15., - 15h of the comparison are connected to the output of the decision unit 6 and the element

OR-NOT 21, the output of which is connected to the first input of the logic element OR 20, the second input of which is connected to the output of the decision unit 6. The device works as follows.

From the sensors controlling the parameters of the technological process 91-9h, information enters the decision block 6, where, together with the information,

5 coming from the task unit 5 and the loss analysis unit 8, generating control signals that provide off-peak operation of the electric power consumers, as well as forcing these consumers to equalize the load curve in the period outside the maximum load of the power system. The signals developed in it are received in block 10.

5 drive controls, where they are converted into control influences on the corresponding consumers of automation circuits and controllers.

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With sensors

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1, the electricity consumption information of the enterprise enters the metering unit 2, where the values of the 30-minute consumption of the enterprise (PT30) and the history for the time intervals At during the period T are formed. The signals of timer 11 provide information on the 30-minute load (PT30) to the comparator unit, where it is compared with the 30-minute power supplied by the company for the 30-minute power (Р3а „6 30)„ Comparison result P 3cIn6 30-PT30 D . is given to the display unit 7, if, which carries out the indication

of this magnitude and signaling.

The signal from the timer 11, information about the consumption of electricity for periods of time

, flt during the period T comes from accounting block 2 to forecast block 3, where it is processed by a given algorithm and the expected 30-minute load is calculated over time t (t K4t, where ... i The expected 30-minute the load enters the comparison block 4, where it is compared with the RENIAV 30 value received from the block 5. The result of the comparison Rza in 30-Rlr 30 4 2 enters the decision block 6.

The signals from the 1L - датчиков electricity sensors are also fed to the loss analyzer 8, where they go to the input of the counters 12., - 12, which at their output form the values of the electric power consumption. According to the signal from timer 11, which goes through the time intervals 4t to the control inputs of registers 13 13 and to the reset inputs of counters 12, -12P, the values of power consumption of electric power for a period of time dt (average power P) are stored in registers 137 - 13P, while resetting the counters 12., - 12P. The mean power values are P; from registers 131-13 "are fed to the inputs of nodes 14 ,, -14 n permanent memory, which convert the received

their input value by expression:

  R; to

where R. is the resistance of the 1st addition. Thus, at the outputs of nodes 14., - 14 of the permanent memory, we obtain the values corresponding to the loss of power in the i-th connection of the enterprise network. These values arrive at the first inputs of the circuits 15 15 ,, comparison, to the second inputs of which the output of the reversing counter 16 is connected, to the inputs of the forward and reverse counts of which, through the switch 17 and the element And 18, pulses are received from the generator 19 clock pulses. To the first input of the switch 17, the output of the comparator unit 4 is connected, which controls the switching of the second input of the switch 17 depending on the value of & l. If the value is L, 0, which indicates that the load is greater than the allowable value and the need to disconnect the consumer-controller, switch 17 connects the output of the element 18 and the generator 19 to the clock JQ

15 20 25 30

40

35 1 pulses to the countdown input of the reverse counter 16, and if / 3, О - to the direct counting input. When the clock pulses arrive at the countdown input of the reversible counter 16, its output will first establish the maximum possible value (determined by the digit of the counter), which then decreases to zero. The permanently decreasing value from the output of the reversing counter 16 will be compared with the circuits 15., -15h compared with the values of the power losses in the associated distribution network of the enterprise. The first will be the equality of the values of the counter and the power loss at the inputs of the comparison unit to which the largest value of the power loss is received. In this case, at the output of the comparison circuit 15, the level of a logical unit appears. The outputs of the circuits 15, -15 h of the comparison are fed to the input of the decision-making body 6 and to the OR-NOT 21 element. The occurrence of a logic one level at one of the inputs of the OR-NOT 21 element will cause the appearance of a logic zero level at its output, which is transmitted through the element OR 20 to the second input of the element AND 18, blocking the further arrival of the clock pulses from the generator 19 clock pulses to the reversible counter 16, the value at the output of which is fixed.

The decision block 6 analyzes the values received from the 15, -15h comparison circuits, indicating in which connection at the moment the power loss is maximal and where it is most expedient to disconnect the consumer-controller. The values obtained from the sensors are also analyzed. technological process and the values of the settings coming from the block 5 setting settings. If on technological. Under these conditions, it will be impossible to disconnect the consumer-controller in this connection, decision block 6 sends a signal corresponding to the level of the logical unit to the second input of the OR element 20, which unlocks the AND 18 logic element and the pulses from the clock generator will continue to flow to the reversible counter 16 Schemes 15., - 15P comparisons continue the comparison.

the values of the reversible counter 16 with the values of losses in the connections, until the connection with the second largest losses was detected, the decisive block 6 again repeats the analysis of the values received from the outputs of the circuits 15. - 15 h comparison. This process continues until the connection is established, as long as the power loss is reduced and the process condition is not disconnected. Simultaneously with the switching of the consumer-controller, the reversible counter 16 is reset.

If the comparator unit 4 generates a signal corresponding to, which corresponds to the need to turn on the consumer-controller for leveling the load curve, the switch 17 connects the output of the element 18 and the generator 19 clock pulses to the direct count output. At the same time, at the output of the reversible counter 16, the value grows from zero to the maximum possible, determined by the digit of the counter. In this case, the comparisons first of all reveal the connection where at the present moment the power losses are minimal. In the future, the loss analysis block works in a similar way, when Ј 0 only, the connection with the least losses is detected, in which, according to the conditions of the technological process, the inclusion of a consumer - controller is permissible. At the same time, the corresponding control signal arrives at the drive control unit 10 and a switch is made.

The introduction of an electric power loss analyzer makes it possible to control the electrical load of an enterprise while optimizing the power flows in the distribution network of the enterprise. As a result, the power and electricity losses in the distribution network of the enterprise are reduced and the efficiency of the management of the electrical load of the enterprise is increased.

Claims (1)

Invention Formula A device for automatic control of the electrical load of the enterprise according to the author. No. 805472, characterized in that, In order to reduce the losses of electric power consumed by an enterprise, an electric power loss analyzer is inserted into the device, containing an electric power consumption meter, registers, fixed memory nodes, comparison circuits, OR-NOT element, reversible counter, switch, AND element, OR element, and clock generator, the output of which is connected to the first input of the element I, the output connected to the information input of the switch, the control input connected to the output of the comparison unit, and the outputs to the corresponding inputs of the forward and reverse counting of the reversible counter, the control input connected to the additional output of the decision unit, and the output to the first circuit inputs Comparison, the information inputs of the electricity consumption meters are connected to the outputs of the electricity consumption sensors, the outputs are connected to the information inputs of the corresponding registers, whose gates and the reset inputs of the electricity consumption meters are connected to the corresponding timer output, and the outputs of the registers are connected to the address inputs of the corresponding fixed memory nodes. the outputs connected to the second inputs of the respective comparison circuits, the outputs of which are connected to the additional inputs of the decision unit and to the corresponding inputs of the element OR NOT, the output of which is connected to one output of the element OR, the other input of which is connected to the corresponding output of the decision block, and output - to the second input of element I.