SU777659A2 - Device for simulating supply system - Google Patents

Description

one

The invention relates to the field of analog-physical modeling of elements of autonomous electric systems (NPP) of direct current.

According to the main author. St. No. 641466, a device for modeling power supply systems is known 5, which contains its current regulator, the information input of which is connected to one input of the device, and the control input is connected to the output of the functional converter, and the current sensor whose input and output are respectively connected to another the load element and two switches are entered into the input and one output of the device, the moving contact i5 of the first switch is connected to the output of the current regulator, the closing contact of the first switch is connected to one The load element, the other output of which is connected to the output of the current sensor, 20 and the disconnecting contact of the first switch is connected to another output of the device, the movable contact of the second switch is connected to the input of the function converter, the closing contact 25 of the second switch is connected to one input of the device, and the disconnecting contact the second switch is connected to the output of current sensor 1.

The known device is intended 30

only for modeling SES and electricity receivers. However, in the general case, in the study and design of complex NPPs, it is necessary to simulate, in addition to power supply systems and electricity receivers, such specific elements as on-board networks, electrical power converters, secondary power supplies, etc., which can be united by a common name - two-port networks.

The aim of the invention is to expand the functionality of the device by reproducing the properties of four-pole NPP elements.

To do this, a second current controller, a current source, a second current sensor, a third switch, and a key are additionally introduced into the device, with the current sensor input being connected through the second current sensor to one output of the current source, the other output of which is connected to the information input of the second current controller, the output of which is connected via a switch to the opening contact of the first switch; in addition, the output of the current regulator is connected to the closing contact of the third switch, the opening contact of which is connected to one output source current, and the movable contact of the third switch is connected to a second input of the function generator, a second output connected to a control yuschil vhbdbm second regulator.

The drawing shows the proposed device.

The device contains a current controller 1, a functional converter 2, a current sensor 3, a load element 4, switches 5 and 6, input terminals 7 and 8 and output terminals 9 and 10, a second current controller 11, a current source 12 with a switch 13, a second the current sensor 14, the key 15 and the third switch 16.

The device works as follows.

When modeling SES (energy sources), the moving contacts of switches 5 and 6 are closed to the normally open contacts. The key 15 is in the open state, i.e., the output of the regulator 11 is disconnected from the output 9 of the device. An external power supply of the required power is connected to the input of the device, and a real receiver is connected to the output of the device. The output voltage (7i, n of the external source is fed to the current regulator 1, which converts it in accordance with the output signal (Mind of the functional converter. At the same time, the system current flowing through the power receiver is defined by

-and,

/with

Zn (P)

where Zn (P) is the receiver impedance

operator form; and - the converted voltage at the output of the current regulator.

The output signal t / d of the current sensor 3 (shunt), proportional to the current of the system If, is fed to the input of the functional converter 2, which is an analog-digital computing device, which simulates the static and dynamic properties of the investigated SES, and also modeling of various kinds of disturbances equivalent to disturbances in real systems.

The device with respect to its output has properties equivalent to the properties of the simulated SES in the system under study.

When simulating electricity receivers, the movable contacts of the switches 5 and 6 are closed for closing clocks, cycles, and the key 15 is in the open state. In this case, the SES under study is connected to the device input, and the output signal of the current regulator 1 is fed to the load element 4. The output signal t / M of the converter 2 is formed according to the expression

() un, where Uam. (P) 1 / 2am (P) is the conductivity of the modulated receiver, realizable in the functional converter.

The current / p flowing through the ballast resistor 4 is determined by the expression

where b is the resistance of the ballast resistor 4, and flows through the investigated SES. In this case, relative to its input, the device has properties equivalent to the properties of the simulated receiver in the system under study.

When simulating four-pole elements, the movable contacts of the switches 5 and 6 are closed on the closing

contacts, and the key 15 closes and thereby connects the output of the current regulator 11 to the output 9 of the device. The switch 13 of the source 12 is in the closed (on) position. To device input

the SES under study is connected, and the real power receiver under study is connected to the output of the device. The output voltage / 7ip of the SES under study and the output voltage U of the current source

12 are respectively supplied to current controller 1 and current controller I, which convert the indicated voltages in accordance with the output signal U and the output signal of the function converter. With this signal. ; (/ m is fed to the control input of the regulator 1, and the signal to the control input of the regulator 11. Any quadripolar element in the considered NPPs is possible and appropriate

represent differently relative to the current consumption / 1 from the input terminals and relative output voltage from the input terminals. In this case, the input coordinates of the quadrupole are the voltage and and, w at its input terminals and the output current / 2 - / s flowing through the power receiver. The analytical record of a similar linear quadrupole has the following form

(/) +);

U, LJ, K, (P) + f, Z, AP),.

where Uvh (P) is the input conductivity; Ki (P) feedback ratio

by current;

K2 (P) is the voltage gain factor;

2out (/)-output resistance. In order to realize the dependence, the movable contact of the switch 16 is closed to the normally closed contact, which is connected to the output of the sensor 14. As a result, the output signal Ud of the sensor 14, proportional to the current / 2 of the quadrupole, is cast on

auxiliary input of the functional converter 2. The output signals t / m and f / .M of the functional converter 2 are formed according to the expressions

())

U U, K, (P) + I, Z ,, (P) -R ,,,

where 14 is the resistance of the sensor 14.

To eliminate the influence of the resistance 14 of the shunt in the sets of the set Ki (P) and 2out {) of the functional converter, it is necessary to increase the gain factor in times. At the same time through the element 4 current flows, defined by the expression

  and a current / 2 flowing through the electricity receiver, defined by the expression

/,

but,

Zn (P)

In this case, the device with respect to its input and output clamps has properties equivalent to the properties of the simulated four-pole element in the studied nuclear power plant.

There are also other forms of representation of quadrupoles, which can also be used to simulate quadrupoles in the studied NPPs.

Thus, the proposed device expands the functionality by reproducing the properties of the simulated two-port networks, which is their complex and essential elements of the nuclear power plant; reduces time and reduces the laboriousness of modeling processes in research, tuning, production control and design of nuclear power plants; automates and accelerates the process of designing and researching complex NPPs, simplifies the operation of the device.

Claims (1)

Invention Formula Device for modeling the power supply system by author. St. No. 641466, distinguished by the fact that, in order to extend the functionality by reproducing the properties of the quadrupoles, a second current controller, current source, second current sensor, third switch and key are additionally introduced, and the current sensor input through the second current sensor connected to one output of the current source, the other output of which is connected to the information input of the second current controller, whose output is connected via a switch to the opener, named by the contact of the first switch, the output of the current regulator connected to the circuit yush.im third switch contact, razmykayush, uv contact of which is connected to one terminal of a current source, and the movable contact of the third switch is connected to the swing dopolnntelnym functional transducer Accessory whose output is connected to the control input of the second current regulator torus. Sources of information taken into account during the examination 1. USSR author's certificate No. 641468, cl. G 06G 7/48, 1976 (prototype).