SU1184046A1 - Device for distributing and compensating reactive loads under parallel operation of synchronous generators - Google Patents

Description

The invention relates to electrical engineering, is intended for automatic control of the direction in power systems and can be used to distribute and compensate reactive loads of synchronous alternating current generators in power supply systems operating on active-reactive load. ten

The purpose of the invention is to increase the power factor (ow ().

The drawing shows a functional diagram of the device distribution and compensation of reactive loads with 15 parallel operation of synchronous generators.

The device contains a central setting device 1, sensors 2 of reactive power, null indicators 3, performing 20 blocks of 4 synchronous generators, sensors of 5 rotor currents, automatic excitation regulators 6, sensor 7 of reactive load, unit 8 of comparison and memorization, block 9 integrated 25 unit, the search motion generation unit 10, the motion control unit 11, the motion direction control unit 12, the executive unit 13. The blocks 7-13 form a self-adjusting extremal controller.

As a central setting device 1, a voltage regulator is used, the signals of which are proportional to the voltage on the buses of the power supply system, and the specified values of rotor currents and reactive powers are determined by them in the executive unit 4. The zero-indicator 3 fixes the moment of changing the sign of reactive power and carries out the restructuring of the work of the executive unit 4 and the distribution of reactive power over the rotor current in the mode of issuing reactive power by generators and reactive power in the mode of its consumption. In the first case, the executive unit 4 operates on the basis of signals from the rotor current sensor 5, in the second from the reactive power sensor 2.

The device works as follows.

If the generators are connected to the active-inductive load, then 55

reactive load sensor 7 outputs a signal to a comparator and storage device 8, which compares the current value of the reactive power from the previous step is determined by their difference P (O - _n 0) ^»κ θ ^τ θΡ ^35ϊ stored for the next comparison step. The signal is proportional to the magnitude and sign of the difference (P _n ., ~) Is fed to the integrating device 9, which forms the impact on the motion control unit 11 and the motion voltage control unit 12. The motion control unit 11 depending on the magnitude of the difference (U _L .- <7 η) is generated step size regulation, depending on the sign of the difference unit 12 controls the direction of movement - direction regulating reactive power in order to reach its minimum. Block 10 of the formation of the search movement provides a definition of the direction and magnitude of the first step of regulation. The executive unit 13 signals from the motion control unit and the directional control unit generates a signal to the executive units 4 generators of such a sign that translates them in the mode of issuing reactive power of a capacitive nature, which will lead to compensation of reactive power in the network. The regulatory process continues until the network is set to the minimum reactive power at a given load. In the process of regulation, the sensors 2 reactive power signal a null indicator

3, which, in the mode of issuing capacitive reactive power by generators, switch actuating units 4

on the distribution of reactive power on the relative value of the rotor currents. The current value of the rotor currents comes from the sensors 5 of the rotor currents, and the set value is determined by signals from the central setting device 1.

When the nature of the load on the active-capacitive self-adjusting regulator changes the generators in the unexcited mode, the consumption of inductive power. In this case, the null indicators 3 fix the change of sign, reactive power and outputs a signal to the executive unit

4, which blocks the rotor current signals and 'switches distribution,

3

reactive power and relative values of reactive power. Its current value is fed to the executive unit 4 from the sensors of reactive power 2, and the set value of reactive power is determined in accordance with the signals from the central setting device 1. The regulation process continues to mini1184046. four

the minimum value of reactive power at a given load value.

When the sign of the reactive load in the network is reversed, the control process 5 is reversed, the generators are over-excited, and the process of distribution of reactive power is carried out along the rotor currents.

Claims (2)

THE DEVICE OF DISTRIBUTION AND COMPENSATION OF REACTIVE LOADS AT PARALLEL OPERATION OF SYNCHRONOUS GENERATORS, containing two reactive power sensors, the outputs of which are connected to the inputs of the executive units of the corresponding synchronous generator, the other generators of the rotor current generators and the corresponding excitation generators of the corresponding generators of the generators of the corresponding synchronous generators, other generators of the corresponding synchronous generators, and other generators of the corresponding synchronous generators, are connected to the other inputs of the generators of the rotors, and the automatic synchronous generators of the corresponding synchronous generators have been connected to the other inputs of the corresponding synchronous generators. third inputs of execution units, characterized in that, in order to increase the power factor (ow C /), it is equipped with two null indicators and a self-tuning extreme regulator consisting of a sensor reactive load, comparison and memorization unit, integration unit, direction control unit, division control unit, search motion generation unit and executive unit, with inputs of null indicators connected to the outputs of reactive power sensors, and outputs connected to inputs of executive units of corresponding synchronous generators , the input of the reactive load sensor is connected to the terminals for connection to the common bus of the power supply system, and the output to the comparison and memory unit, the output to Secondly connected to the input of the integration unit, the output of which is connected to the inputs of the directional control unit and the motion control unit, the output of the voltage control unit is connected to the input of the executive unit, the second input of which is connected to the output of the motion control unit, the outputs of the executive unit are connected to the second input of the unit integration and with the inputs of the executive units of synchronous generators. 1184046 > one 1184046 2