SU1453078A1 - Method and apparatus for presetting the working duty of power plant - Google Patents

Abstract

The invention relates to instrumentation engineering and is intended to generate the setpoint signals and protect power units (EA) from abnormal modes. The purpose of the invention is to increase the reliability and accuracy of setting the EA operation mode when the main converter (P) of the EA shaft rotation frequency fails. The main frequency P 1 through the driver 2 is connected to the summing register (CP) 3, the bit outputs of which are connected to the inputs of the block 4 settings. Through the detector 5 and the key 6 P 1 is connected to the CP 3, and through the switch 7 to the divider 12, the bit outputs of which are connected to the inputs of the decoder B and one of the inputs of the operator 13. The output of the detector 5 is connected to the enable input E of the decoder 8. An additional frequency p. 10 is connected to key 6 via multiplier 9. Key 7 is connected to the divider and CP 3 and control unit 14. The frequency of rotation of the EA rotor is monitored with. P 1 during predetermined time intervals. When the rotational speed of the EA is reached within a predetermined interval, an installation command for setting the EA operating mode is generated in the range of a given value. The frequency of rotation of the rotor EA is controlled by means of P 10 during a time interval (K m), where T is a predetermined time interval; M is the conversion factor P 1; m is the conversion factor P 10; K - factor multiplier P 10. 2 s.s. f-l1, 1 ill. (L 4. ate 00 about 00

Description

The invention relates to instrumentation engineering and is intended for the development of the setting signals and the protection of power units against abnormal modes.

The aim of the invention is to improve the reliability and accuracy of setting the operating mode of the power unit when the main frequency converter of the power unit shaft breaks down.

On. The drawing shows an exemplary embodiment of a block diagram of a device for implementing the method.

The main converter 1 of the rotation frequency of the power unit through the driver 2, which reacts to one of the differences or to both peaks of the input signal of the converter 1 and forms a single level in the absence of signal pulses from the output of the converter 1, is connected to the counting input of the summing register 3, and the bit outputs of register 3 are connected to the inputs of the block 4 of settings. Alarm converter 5 is connected to converter 1 of converter 1. The output of detector 5 is connected with the inputs of the first 6 and second 7 keys, made as operators 2I-NOT, as well as with the unlocking input E of the decoder 8. Conclusions | key 6 are connected to the input of the analog-pulse multiplier 9 connected with the additional converter 10 of the rotation frequency of the power-generating shaft, and to one of the inputs of the summing iro register 3 whose input circuit is made according to the 2I circuit. The pins of the key 7 are connected to the inverter 11 and to the zero input R of the divider 12. The bit outputs of the divider 12 are connected to the inputs of the decoder 8 and to one of the inputs of the operator 13 2KE-OR to the second input of which the output of the decoder 8 is connected, and the output of the operator 13 is connected to the control input of the control unit 14, designed to extract from the sequence 15 pulses generated by the reference generator 15 sequences of autonomous pairs determining the time of the measuring cycle and the pulses, the first of which having a logic level 1 It is used to enter information recorded in register 3 into block 4 of settings

0

five

0

five

0

five

0

five

0

five

on input c, and the second from uRO; logical O about it to erase this information on the input of zeroing R of register 3.

When the main converter of the I frequency of rotation of the power unit shaft is intact, a logic level O is formed at the output of the alarm device 5, whereby the output of the first key 6 sets the level of logic 1 and the signal pulses through the driver 2 are fed to one of the inputs of the first cell unlocked by the output signal register 3, and the signals of the additional converter 10 of the rotation frequency of the power unit shaft through the analog-pulsed multiplier 9 cannot be received at this input due to blocking and the first key 6 having a logic level -O output signal of the detector 5.

i

Simultaneously signals from the output

reference oscillator generator 15 is fed to the reverse (inverse) dynamic counting input C of divider 12. Since decoder 8 is blocked at input E by a signal from the output of alarm 5, a logic level 1 is set at its output, thereby recording the incoming from a reference generator 15 pulses to the input of the signal divider 12 are carried out before it is self-null, before which at its last inverse bit output Q a logical level O is set, which after inversion is supplied through the operator 13 to the input block and 14 controls. As a result, due to the inverse-dynamic properties of the counting input C, the divider 12, the next one after setting the logical level 1 divider 12 at the output Q, 1 pulse passes through control unit 14 to input C of setting 4. The code combination of logic levels at the bit outputs of the summing register 3 enters the setting unit 4 for processing, after which the next pulse of the reference pulse generator 15 after inversion in the control unit 14 is fed to the oblique input R of the register 3, and the rotation speed coding process is resumed and lasts for a period determined by the periode of T M

m To the house generated by the block 14, a register of 3 pulses.

The frequency of rotation of the shaft of the power unit with the help of an additional converter 10 pulses carried out during time intervals

  specified time interval; the conversion factor of the main Converter 1 frequency of rotation of the shaft of the power unit;

conversion factor of the additional frequency converter of rotation of the shaft of the 3proaggregate; factor of additional P1 factor for rotation frequency of the power unit shaft.

Claims (2)

1. The method of setting the mode of operation of the power unit, which consists in controlling the rotor frequency of the power unit using the main frequency converter for predetermined time intervals and when the rotor frequency of the power unit is reached during a predetermined time interval of a given value, generate an setting command for setting the mode of the power unit, It is distinguished by the fact that, in order to increase reliability and accuracy when the main frequency converter fails, the rotor speed is Nergoagregat is controlled by means of additional U53078 frequency converter during time intervals - t Km 0 five 0 five 0 0 Where Tm m K is the specified time interval ;, - conversion coefficient of the main converter of rotational speed of the rotor of the power unit; - conversion coefficient of the additional frequency converter of the rotor of the power unit; The multiplier factor of the additional converter of rotational speed of the rotor of the power unit. 2. A device for setting the operating mode of an energy unit, comprising a main rotor frequency converter of the power unit, a summing register, a setting block, a control unit and a divider, characterized in that, in order to increase reliability and accuracy, the device is equipped with an additional converter, a reference generator, a decoder, by the operator, two keys, a multiplier, a signaling device and a driver, and the main frequency converter is connected through the driver; with the register dash, and through the alarm g and the first key is connected to the summing register and through the second key to the divider, the additional frequency converter is connected to the first key through a multiplier, the second key is connected to the divider and the summing register and the control unit, and the reference generator is connected to the divider and control unit.