SU1192034A1 - Method of controlling drive motors of diesel-generators operating in parallel - Google Patents

Abstract

1. METHOD OF MANAGEMENT OF DRIVE ENGINES PARALLEL-OPERATING DIESEL-GENERATORS by. influencing the torques of their drive motors, characterized in that, in order to increase the dynamic accuracy and reduce the exchange oscillations of the active power between diesel generators, the instantaneous values of the active powers of the generators are measured, the variable instantaneous powers of the generators are shifted in phase to the values corresponding to the delay time in the transmission channels of the regulating actions of diesel generators, and control the drive motors of the generator in a function of the phase shifted variable components of the active powers of the generators.

Description

2, Method POP.1, distinguished by the fact that, in order to evenly distribute the active load, between the generators, with non-identical regulating characteristics of diesel generators, the constant component of the active

1192034

-f loads, detect the difference between the constant components of the active powers of the generators and control the wired motors as functions of the phase-shifted variables and the difference of the constant components of the instantaneous active powers of the diesel generators.

one

This invention relates to automation and electrical power systems. The purpose of the invention is to increase the dynamic accuracy and reduce the exchange oscillations of the active power network of parallel-running diesel generators.

The effect of the proposal is achieved by compensating for the delay in the transmission channels of the regulatory actions of the generators by filing ahead of time. speed regulators of drive engines; generator torvv corrective signals corresponding to the expected change in the active power of the generators. By reducing the delay of regulating actions, the system of parallel operating generators is shifted from the stability boundary in the field of stable processes.

The magnitude of the phase shift in the transmission canap of the regulating action of the diesel generator is determined by the expression

I-Zf.f.C. ,

where f. - frequency of exchange oscillations of the active power of diesel generators; ; - the delay time in the transmission channel of the regulating action of the diesel generator; - i is the serial number of the diesel generator. The magnitude of the phase shift of each diesel generator has a constant value and lies within 0.31, 6 rad.

The drawing shows block diagrams

devices for implementing the proposed method.

The device contains a generator 1, an instantaneous active power sensor 2, a dividing filter 3, a phase shifting unit 4, a unit 5 comparing the constant components of instantaneous active loads, an automatic speed controller 6, a drive motor 7, and an adder 8.

The device works as follows.

The change in active power of parallel-running diesel generators is detected by instantaneous active power sensors 2, the output signals of which are permanently divided and the variable components in filters 3 tuned to the allocation of the exchangeable power component. The variable components carrying information about the magnitude of the exchange power are fed to the phase shifting units 4, which are shifted in phase by values corresponding to the back-up time in the transmission channels of the controlled actions of the diesel generators. The constant components characterizing the average values of the active powers of the generators are fed to block 5, in which the difference between the mean values of the active powers of the generators is determined. As a result of the summing, on the adders 8 of the output signals of the block 5 and the phase shifting blocks L, signals are generated that control the torque of the drive motors 7 through the automatic speed controllers 6 until the active loads of the diesel generators are not equalized and the output signals of the adders 8 will not disappear.

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If the automatic control system of the comparator block 5, the rotation adders of rotational speeds at-8 and the communication lines between the generators, the water engines 8 are identical, which simplifies the control system, the red control characteristics, the control of the active power between the control constants-5 diesel generators operating in parallel with instantaneous active power, in particular, are located in regulators; regulators are made at relatively large distances of 6 rotation speeds without using each other from friend.

Claims (2)

1. METHOD FOR CONTROL DRIVE ENGINES OF PARALLEL WORKING DIESEL GENERATORS by. impact on the torques of their drive motors, characterized in that, in order to increase dynamic accuracy and reduce the exchange fluctuations of active power between diesel generators, measure the instantaneous values of the active powers of the generators, identify the variable components of the instantaneous active powers of the generators, shift them in phase by corresponding to the delay time in the transmission channels of the regulatory actions of diesel generators, and control the drive motors of the generators in fu ktsii shifted from the phase variables of the active power of the generator components. 2. The method according to claim 1, characterized in that, in order to uniformly distribute the active load. between generators, for non-identical regulatory characteristics of diesel generators, the constant component of the active load is isolated, the difference between the constant components of the active powers of the generators is detected and the wire motors are controlled as phase-shifted variables and the difference of the constant components of the instantaneous active powers of the diesel generators.