SU760069A1 - Device for automatic regulating of electric power consumption by a plant at peak hours of power system loading - Google Patents

Description

The invention relates to the field of automation of power consumption by industrial enterprises during peak hours of the load of the power system.

Known devices for tariff ³ calculations of enterprises for electricity [1].

The disadvantages of the known devices are the impossibility of using them for enterprises with a generalized power supply structure, the lack of accounting for reactive energy, and the lack of flexibility to organize the calculation at differentiated tariffs.

It is also known a device for the tariff-based calculations of an enterprise for electric energy at a two-way tariff, containing a time sensor, a pulse sensor of instantaneous combined power of an enterprise, and a self-recording instrument 20

The disadvantage of the known device is the absence of regulatory actions to connect or disconnect the backup (additional) 25 power. It allows the dispatcher to only control the average power and give a rough estimate of the possibility of connecting or disconnecting additional power. thirty

2

The purpose of the invention is to improve the accuracy by predicting the amount of regulation of power consumption at discrete points in time, determined by quantizing the uniform power consumption graph over a thirty-minute time interval, based on the average frequency of the pulses characterizing the combined power of an enterprise at peak times of the power system.

This goal is achieved by the fact that a device for automatic regulation of power consumption by an enterprise during peak hours of a power system load, which contains a time sensor and a pulse sensor of instantaneous combined power of an enterprise, is equipped with an averager of actual speeds, power decoder, decoder-predictor, operator key block and decoder of limit switches, wherein the sensor outputs and the time pulse generator ^{1-governmental} instantaneous combined output connected to extractor averaged nnyh velocity, the outputs of which are connected to the input of decoder predictor, the second input of which the output time of the sensor is included, and the decoder predictor unit outputs connected cheree

760069

operator keys to the additional power control circuits and to the input of the decoder of maximum outages, which is connected to the second input with a time detector, and the outputs of the decoder of maximum outages are connected to circuits of additional power outages.

FIG. 1 shows a block diagram of a device for automatic regulation of power consumption (θ by an enterprise at peak times of the load on the power system; Fig. 2 is graphs explaining the principle of its construction and operation.

Device for automatic regulation of power consumption Taking into account the peak hours of the power system load, contains an impulse sensor 1 instantaneous combined power of an enterprise, a sensor 2 times, a selector 3 averaged speeds of real power consumption, a decoder-predictor '4, a block of 5 operator keys, a decoder 6 limit switches.

Pulse sensor 1 output is connected to the output of the selector 3 average speeds of the actual power consumption and is used to determine the instantaneous combined power of the enterprise. thirty

The time sensor 2 generates time stamps and its output is connected to the selector 3 of the average speeds of the actual power consumption, the decoder-predictor 4 and the decoder used for the maximum outages.

The selector 3 averaged speeds of the actual power consumption by its outputs is connected with the decoder-predictor 4, and the inputs with the pulse sensor 1 instantaneous 40 combined power of the enterprise and the sensor 2 times. It determines the power consumption rate averaged over a certain time interval, compares it with a set of speeds, 45 stored as constant values in a given block, rounds the received speed to the nearest value, generating a signal at a certain output. In addition, the selector 3 cont-50 rolls the consumption of the declared power of the enterprise, indicates its balance and generates signals to switch off additional power.

The decoder-predictor 4 inputs connected to the outputs of the sensor 2 time and the selector 3 average speeds of the actual power consumption, its outputs are connected to the unit 5 operator keys. It serves to form a certain amount of regulating influences for control circuits of additional capacities, to memorize the resulting deviation from uniform power consumption, taking into account overrun or less

additional consumption at certain time intervals and the generation of additional power to turn off.

The block 5 of the operator keys is connected to the outputs by the control circuits of additional capacities and to the inputs of the decoder 6 maximum trips. Based on the information from the decoder-predictor 4 and the information entered by the dispatcher, the operator key block 5 generates additional power on (off) signals with indication of their values, and also imposes a ban (temporary or permanent) on regulating and deactivating additional powers.

The decoder 6 limit switches, connected to the outputs of the pulse sensor 1 instantaneous combined power of the enterprise and the time sensor 2, is connected to its outputs in the circuit for switching off additional power and is intended for limiting shutdowns of additional power on the basis of information received. from the decoder-predictor 4 through the block 5 operational keys.

The construction of the device is based on the method of quantization of the uniform flow function of the power declared by the enterprise by splitting a thirty-minute time interval into uniform increments ΔΙ = C-ί ₀ = ··· = \ - χ., And

partition each of the increments ΔΥ of the function Υ into η parts in such a way that

ΔΥ = η & P, ·

where d P is the quantization step according to the declared power P _b ;

n - coefficient to reduce the levels of regulation, taking into account the organizational measures of the enterprise associated with the division of reserve (additional) capacity into groups.

The goal of quantization is to predict the magnitude of the regulatory impact to control the power consumed by an enterprise at discrete points of time based on its average consumption rates. To this end, in FIG. 2 also shows the following graphs: Ro, is the declared combined half-hour power, and R. ”sop51; ϋ is the actual capacity of an enterprise; X is a function of the uneven consumption of actual power ¢, for which, in general, there are jumps and, therefore, large instantaneous rates of change.

Uniform power consumption RL, characterized by the function Υ, which has the form of a direct

Υ “P ^ - ρΐ; (I)

five

760069

where is the time at the ΐth point;

ϊ = 0, 'I, 2. . . to

The value Ρ = ВД1 characterizes the uniform flow rate of the declared power per unit time. Deviations from the Υ function mean either a slowdown, 5 or an excess of the declared power consumption at the time of the measurements.

The value of the increment ΔΧ = BC of the function of nonuniform flow of real power X is derived from the triangle ABC:

ΔΧ = D1 · X ¹ , (2)

where δι = D1; = H + L- H>

X '= * 9ЛТ, thus, the magnitude of the velocity 15 х' or the averaged velocity on the interval Л г _с = Д1 unambiguously determines the increment of the function, and, therefore, the magnitude of the regulating influence with a certain constant factor of 20

. <tom.

Thus, on each interval of DC there are three possible cases: = P,

In [> P and P. In the first case, power consumption occurs uniformly. but, and regulating effect I = 0.

In the second case, the consumption of the declared power is exceeded, and the regulating action is necessary at the next interval 4C _AND or at some other D £ | ()> (“+!). In the third case, the regulating effect is desirable, since there is an underconsumption of the declared capacity, which is unprofitable for the enterprise.

Regulatory impact on the next interval when Ts. F. P to enter the mode of uniform power consumption is determined by the formula

Dr. = 2dg · (3) 40

With a single increment along the time axis

dr = 2U {.

If on the next interval d is not required to enter the mode of uniform consumption, then DR =. If 45

regulation will be carried out on the interval D1 $, then dr = O, and the regulating effect of others, expressed in terms of the number of steps P, should be remembered. 50

Since the function Υ is divided into equal increments in quantization along the axis of the argument, and d Υ = η dR, then

DD = P _g / pc (4)

The expression (ί) is used to determine the enterprise with the smallest adjustable value when creating reserve (additional) capacities.

On the basis of (2), each value of £ P should be assigned to the correspondence dr = 1DR - ±

FIG. 2 it can be seen that the function X of non-uniform consumption of the real combined half-hour power, on the one hand, is superimposed on a grid of uniform divisions over time.

meni and k. η of uniform partitioning by power, and all its changes in any interval Δι- are controlled by the tangents of the angles of inclination of the straight lines O _L o ?,

° 1 ^A h, etc., drawn from the point O _p on the y-axis to the point c, 1 _g ♦. Ιχ on the time axis, or averaged speeds of the actual power consumption on the intervals Δί ^, which allows for effective regulation with prediction of overrun or underflow of the claimed power on each discrete time interval.

The device works as follows.

The launch is carried out by signals coming from sensor 2 of time with the onset of the rush hours of the power system. In this case, a binary-decimal code of the declared combined half-hour power P ^ is entered into the selector 3 of the averaged speeds of the actual power consumption.

Based on the pulses transmitted from the pulse sensor 1 of the instantaneous combined power of the enterprise during peak hours of the power system, and the time stamps received from time sensor 2., the selector 3 averaged speeds of actual power consumption determines the average power consumption rate at each interval Dc ^, compares a value with a set of speeds stored as constant values in a given block, rounding the value obtained to the nearest of a given set of speeds. Rounding is always in a big way. To ensure regulation with an accuracy of the value of (ДР), the number of the set of velocities is chosen equal to к-η. At the same time, the remainder of the declared power P _{b is} monitored by subtracting pulses from its code from the pulse sensor 1 from its code.

The output signals of the selector 3 are fed to the inputs of the decoder-predictor 4, which sets in correspondence to the signal received on one of the k. Η tires a certain amount of control action that is a multiple of the AR.

The decoder-predictor 4, in addition, remembers the resulting deviation from the uniform power consumption, taking into account its cost overrun or undersupply in arbitrary units equal to the PD. Memorization is carried out in the case when the block 5 operator keys prohibits regulation on the next time interval. In this case, the decoder-predictor 4 ensures that the resulting value of non-regulation tends to zero. Using time stamps, it generates a signal

760069

The warnings, which, through block 5, of the operator's keys, are displayed and are sent to the decoder of 6 maximum trips.

......... In order to control the decoder-predictor 4 also determines the possible overrun or undersupply of the declared power at the end of the thirty-minute interval at a given consumption rate. . , .......

All output signals from the decoder-predictor 4 are received in block 5 of operator keys, which generates signals in the control circuit of additional capacities, and in the decoder, b maximum cutoffs, determines the order of switching on (switching off) additional capacities, forms permission signals for regulation and maximum cutoffs. Through the block 5 operator keys information is displayed for the dispatcher.

In the case of consumption of the declared power of Ro, due to the prohibition on regulation of the thirty-minute and the deadly extractor of 3 average speeds of real consumption of the “Yaya'Public” using the decoder-predictor 4, determined by the dis-. , block 5 operator keys and descrambler used for maximum outages disables all additional power.

The use of averaged speeds in the device The real power consumption, the predictor predictor, the operator key block and the decoder of maximum outages, connected in a certain way among themselves and with known blocks, allows the company to improve the accuracy of energy management during peak hours of the power system load.

Claims (2)

Claims of the invention. A device for automatic regulation of power consumption by an enterprise, during peak hours of energy load. systems, containing a time sensor - * and a pulse sensor of instantaneous combined power of an enterprise, characterized by the fact that, in order to improve accuracy, it is equipped with an extractor of average speeds θ of real power consumption, a decoder-predictor, an operator switch unit and a decoder of maximum cut-off, and the outputs the time sensor and the pulse sensor of the instantaneous combined power are connected to the average speed selector, the outputs of which are connected to the input of the decoder-predictor, to the second input The output of the time sensor is switched on expensively, and the outputs of the decoder-predictor are connected via the operator key block to the additional power control circuits and to the input of the decoder of maximum outages, which are connected to the time input by the second input, and the outputs of the decoder of maximum outages . Sources * of information taken into account in the examination 1. Lozovskiy LI, et al. Measurement of the maximum consumption load. · Industrial Energy, 1973, 4. · 2. Kakhanovich V.S. et al. Devices for tariff calculations for electricity. - "Industrial Energy", 1972, № 5. 760069 uprabs Fig / 760069 Composer 'K. Fotina