SU629590A1

SU629590A1 - Arrangement for automatic detecting of ac generator with extremum active load current

Info

Publication number: SU629590A1
Application number: SU762431896A
Authority: SU
Inventors: Натан Моисеевич Лицын; Семен Натанович Лицын; Виталий Степанович Манин; Юрий Николаевич Хижняков; Владимир Абрамович Черномордик
Original assignee: Пермский политехнический институт; Камское Ордена Ленина Речное Пароходство
Priority date: 1976-12-20
Filing date: 1976-12-20
Publication date: 1978-10-25

Description

(54) УСТРОЙСТВО ДЛЯ АВТОМАТИЧЕСКОГО ВЫЯВЛЕНИЯ(54) DEVICE FOR AUTOMATIC DETECTION

ГЕНЕРАТОРА ПЕРЕМЕННОГО ТОКА С ЭКСТРЕМАЛЬИЯМ АКТИВНЫМ ТОКОМ НАГРУЗКИAC ALTERNATOR WITH EXTREMELIUM ACTIVE LOAD CURRENT

Изобретение касаетс распределени нагрузок параллельно работающих генераторов переменного тока и может использоватьс при параллельной работе синхронных генераторов на судах речного флота.The invention relates to the distribution of loads of parallel operating alternators and can be used in parallel operation of synchronous generators on ships of the river fleet.

Известно устройство дл автоматического вы влени генератора с экстремальным током нагрузки параллельно работающих генераторов, содержащее датчики нагрузки l .A device is known for automatically detecting a generator with an extreme load current in parallel with operating generators, comprising load sensors l.

Это устройство вы вл ет генератор с наибольшим током нагрузки из двух параллельно работающих генераторов посто нного тока.This device detects the generator with the highest load current from two parallel-running DC generators.

Однако, применение его дл генераторов переменного тока затруднительно , так как требуетс установка достаточно сложных датчиков активног тока. Эти датчики обладают относительно невысокой точностью измерени активного тока и низким быстродействием . В некоторых случа х, например лри релейном способе распределени нагрузок, достаточно определить наиоолее или наименее нагруженный .генератор , не уточн количественно значение тока нагрузки.However, its application for alternators is difficult, since it requires the installation of rather complex sensors of active current. These sensors have a relatively low measurement accuracy of the active current and low speed. In some cases, such as the relay load distribution method, it is sufficient to determine the most or least loaded generator without quantifying the value of the load current.

Целью изобретени вл етс повышение быстродействи и точности вы вЛенин наиболее загруженного или незагруженного генератора при параллелной работе генераторов переменного тока.The aim of the invention is to increase the speed and accuracy of the most loaded or unloaded generator in parallel with the operation of alternators.

Это достигаетс тем, что в предложенном устройстве каж.цый датчик нагрузки выполнен в виде импульсного блока положени ротора ге«ератора и устройство снабжено блоком запрета , блоком пам ти на выходе и блоко времени, причем выход каждого из блоков положени ротора подключен к первому входу блока запрета, выхсэд блока запрета соединен со входом блока пам ти, вторьм входом блока запрета и входом блока времени, выход которого подключен к третьему входу блока запрета.This is achieved by the fact that in the proposed device each load sensor is made in the form of a pulsed rotor position unit and the device is equipped with a prohibition unit, an output memory unit and a time unit, with the output of each rotor position unit connected to the first input unit. the ban, the output of the block ban is connected to the input of the memory block, the second input of the block ban and the input of the time block whose output is connected to the third input of the block ban.

На чертеже показана структурна схема предложенного устройства вы влени генератора переменного тока с экстремальным током нагрузки параллельно работающих генераторов.The drawing shows a structural diagram of the proposed device for detecting an alternator with an extreme load current in parallel with the operating generators.

Claims

The rotors of generators 1 operating in parallel are connected to pulse position sensors 2 of the rotors. The signals from the load sensors are received at the first inputs of the prohibition block 3. The output of the prohibition block 3 is connected to the time block 4 and the input of the memory block 5. The output of the prohibition block 3 is connected to the second input of the prohibition block 3, the output of the time block 4 is connected to the third input of the prohibition block 3. The device operates as follows. The signal of active load from generators 1 falls on the block

2. The impulse rotor position sensor can be configured, for example, as follows. On the shaft of the rotor of the generator make a mark in the form of a ferromagnetic tooth. The direction of the tooth in space is parallel to the axis of the magnetic field of the generator rotor. When the generator shaft is rotated, the tooth passes over the magnetic system and causes an EMF pulse in it. If similar sensors are installed on all parallel generators, the relative position of the pulses in time will be determined by the active load of the generators. This mutual distribution of pulses in time is caused by the fact that each level of generator load has its own corner of escape. Therefore, the rotor of the generator, which has the most active load, is ahead (in angle) of all the others and its impulse comes in. Depending on the task of regulating and distributing load currents, the detection device can be tuned to the largest or smallest load current,. The signal from the sensor block 2 of the rotor position falls on the block ban 3, which passes the first signal to the drive through the memory block 5, which forms the control signal of the required generator. After the passage of the first signal to the input of the block, prohibition 3 prohibits the passage of signals through it, and also time block 4 is triggered. The time delay in block 4 does not exceed the time that the generator shaft moves to during an expensive period. a certain angle. At the end of the time lag, block 4 removes the pulse and signals from sensor unit 2 are again fed to memory block 5, which stores information about which of the generators has an extreme load. The application of the proposed device allows to increase the speed and accuracy of detection of the most loaded or not loaded generator, and, consequently, to increase the accuracy of load distribution when operating alternators. Formula of the Invention Device For automatic detection of an alternator with extreme active load current from among parallel operating generators, containing load sensors of each generator, differing in the fact that, in order to improve speed and accuracy, each load sensor is made in the form of a pulsed unit of the generator rotor position and the device is equipped with a prohibition unit, a memory unit at the output and a time unit, with the output of each of the rotor position blocks connected to the first input of the unit In the prohibition, the output of the prohibition is connected to the input of the memory block, the second input of the prohibition block and the input of the time block whose output is connected to the third input of the prohibition block. Sources of information taken into account in the examination: 1. USSR Author's Certificate No. 449420, cl. H 02 J 3/46, 1973.