SU1264083A1

SU1264083A1 - Device for monitoring consumtion and generation of reactive power

Info

Publication number: SU1264083A1
Application number: SU853921456A
Authority: SU
Inventors: Василий Демьянович Стрижак; Лев Федорович Кучин; Георгий Порфирьевич Балан; Ольга Александровна Гребенюк; Александр Андрианович Ясько
Original assignee: Харьковский Институт Механизации И Электрификации Сельского Хозяйства
Priority date: 1985-06-26
Filing date: 1985-06-26
Publication date: 1986-10-15

Abstract

Изобретение относитс к электроизмерительной технике. Цель изобретени - упрощение конструкции и повышение точности ее работы. Устройство содержит преобразователи 1, 2 и 3 тока, преобразователи 4 и 5 напр жени и фазовый компаратор 8. Введение и использование по одному счетчику 6 и 7 реактивной энергии и времени , а также резистора 9, обеспечивающего стабилизированную токовую нагрузку счетчику 7 времени, и обраS зование новых св зей между элемента (Л ми устройства позвол ет повысить коэффициенты использовани счетчиков . 1 ил. |С О) 4;: О 00 ооThis invention relates to electrical measuring technology. The purpose of the invention is to simplify the design and improve the accuracy of its work. The device contains 1, 2, and 3 current transducers, voltage 4 and 5 transducers, and a phase comparator 8. Introduce and use each meter 6 and 7 of reactive energy and time, as well as a resistor 9 that provides a stabilized current load for time counter 7 and processing The formation of new connections between the element (the device allows to increase the utilization rates of the counters. 1 or. | C O) 4 ;: O 00 oo

Description

Изобретение относитс к измерительной технике и может быть использовано на промышленных предпри ти х дл осуществлени автоматического контрол режимов потреблени и генерации реактивной мощности и режима работы компенсирук цих устройств.The invention relates to a measurement technique and can be used in industrial enterprises for the implementation of automatic control of consumption modes and generation of reactive power and mode of operation of compensating devices.

Цель изобретени - упрощение конструкции устройства и повьшение его точности.The purpose of the invention is to simplify the design of the device and increase its accuracy.

На фиг. 1 изображена функциональна схема устройства дл трехфазного потребител , один из вариантов выполнени ; на фиг. 2 - принципиальна схема счетчика с двум счетными механизмами.FIG. 1 shows a functional diagram of a device for a three-phase consumer, one of the embodiments; in fig. 2 is a circuit diagram of a counter with two counting mechanisms.

Устройство содержит три преобразовател 1-3 тока, включенные в цепь питани потребител , два преобразовател 4 и 5 напр жени ,собранны по Схеме в открытый треугольник ,и подключенные к цеп м питани потребител , трехфазный счетчик 6 реактивной энергии с двум счетными механизками6 .1 и 6.2 и цепью 6.3 управлени , счетчик 7 времени с двум счетными механизмами 7.1 и 7.2 и цепью 7.3 их управлени , фазовый компаратор 8 с двум контактными выходами , один из воторых 8.1 срабатывает при индуктивном характере нагрузки, а второй 8.2 - при емкостном характере нагрузки.The device contains three current transducers 1-3, included in the consumer's power supply circuit, two voltage transducers 4 and 5, assembled according to an open triangle circuit, and connected to the power supply circuits of the consumer, a three-phase reactive energy counter 6 with two counting mechanisms 6 .1 and 6.2 and a control circuit 6.3, a time counter 7 with two counting mechanisms 7.1 and 7.2 and a control circuit 7.3, a phase comparator 8 with two contact outputs, one of which 8.1 operates with an inductive load pattern, and the second with a capacitive load character ruzki.

Токовые обмотки 6.4; 6.5; 6.6 счетчика реактивной энергии подключены к соответствующим вторичным обмоткам преобразователей 1-3 тока, а их обмотки 6,7 6,8 6,9 напр жени через нормально разомкнутые контакты выходов 8.1 и 8.2 фазового компаратора - к вторичным обмоткам преобразователей 4 и 5 напр жени .Current windings 6.4; 6.5; 6.6 of the reactive energy counter are connected to the corresponding secondary windings of current converters 1-3, and their windings 6.7 6.8 6.9 voltage through the normally open contacts of outputs 8.1 and 8.2 of the phase comparator to the secondary windings of voltage converters 4 and 5.

Счетчик 7 времени выполнен в виде однофазного счетчика активной энергии , содержит токовую обмотку 7.4 и обмотку 7.5 напр жени . Токова обмотка 7.4 подключена через резистор 9, а обмотка 7.5 напр жени непосредственно к вторичной обмотке преобразовател 5 напр жени .Time counter 7 is designed as a single-phase active energy meter, contains a current winding 7.4 and a voltage winding 7.5. The current winding 7.4 is connected through a resistor 9, and the winding 7.5 voltage is directly connected to the secondary winding of the voltage converter 5.

Цепи управлени 6.3 и 7.3 содержит электромагниты дл переключени счетных механизмов 6.1, 6.2 счетчика реактивной энергии и 7.1, 7.2 счетчика времени, которые через нормально разомкнутый контакт 10 контактного выхода 8.2 фазового компаратораThe control circuits 6.3 and 7.3 contain electromagnets for switching the counting mechanisms 6.1, 6.2 of the reactive energy counter and 7.1, 7.2 of the time counter, which are through the normally open contact 10 of the contact output 8.2 of the phase comparator

В подключены к вторичной обмотке преобразовател 4 напр жени .B is connected to the secondary winding of the voltage converter 4.

Счетные механизмы счетчика реактивной энергии и счетчика времени (фиг. 2) состо т из двух полных наборов барабанчиков (регистраторов). Учет энергии реактивным счетчиком и учет времени счетчиком времени ведетс или по одному, или по другому регистратору в зависимости от того, потребл етс или генерируетс реактивна мощность потребител ми. Например, реактивна энерги , потрел ема потребителем, регистрируетс механизмом 6.1 реактивного счетчика а генерируема потребителем - механизмом 6,2 Точно так же врем потреблени реактивной энергии потребител регистрируетс механизмом 7,1 счетчика времени, а врем генерации реактивной мощности - с механизмом 7,2. Переключение с одного счетного механизма на другой производитс подачей напр жени -через контакты 10 фазового компаратора. 1The counting mechanisms of the reactive energy counter and the time counter (Fig. 2) consist of two complete sets of drums (recorders). The energy metering by the reactive meter and the time metering by the time meter are maintained either by one or another recorder, depending on whether the reactive power is consumed or generated by consumers. For example, the reactive energy consumed by the consumer is recorded by the mechanism 6.1 of the reactive counter and generated by the consumer by the 6.2 mechanism. Similarly, the time of consumption of the reactive energy of the consumer is recorded by the mechanism 7.1 of the time counter, and the generation time of reactive power with the mechanism 7.2. Switching from one counting mechanism to another is performed by applying a voltage through the contacts 10 of the phase comparator. one

Устройство работает следующимThe device works as follows.

образом.in a way.

В режимах потреблени реактивной мощности, когда абсолютна величина реактивной нагрузки контролируемого потребител превышает абсолютную величину мощности, генерируемой компенсирующими устройствами, срабатывает выход 8.1 фазового компаратора 8 и переключает контакты 11-16 в замкнутое положение. В результате этого на обмотки 6.7-, 6,8; 6.9 напржени счетчика реактивной энергии подаетс соответственно напр жение питани , ,, Ug(,. Ось счетчика реактивной энергии при этом вращаетс в заданном направлении, указанном стрелкой, и потребление энергии регистрируетс счетным механизмом 6.1. Резистор 9 обеспечивает стабилизированную токовую нагрузку счетчика 7, его ось вращаетс с посто нной скоростью. Общее врем существовани режимов потреблени реактивной энергии за весь период конрол потреблени фиксируетс счетным механизмом 7.1,In reactive power consumption modes, when the absolute value of the reactive load of the controlled consumer exceeds the absolute value of the power generated by the compensating devices, the output 8.1 of the phase comparator 8 is activated and switches the contacts 11-16 to the closed position. As a result of this, the windings are 6.7-, 6.8; 6.9 The voltage of the reactive energy counter is supplied respectively to the supply voltage, ,, Ug (, the axis of the reactive energy counter rotates in a predetermined direction indicated by the arrow, and the power consumption is recorded by the counter mechanism 6.1. The resistor 9 provides a stabilized current load of the counter 7, its axis rotates at a constant speed. The total time for the existence of modes of consumption of reactive energy for the entire period of control of consumption is fixed by the counting mechanism 7.1,

Claims

In the mode of generation of reactive energy by the consumer, the output 8.2 of the phase comparator 8 is triggered and switches the contacts 17-22 and 10 to the closed, and the contacts 11-16 of the output 8.1 to the open position. As a result, a reverse voltage U, is applied to the windings 6.7, 6.8 and 6.9 of the voltage of the reactive energy meter. , and ", U, СЬ UC Due to the fact that the load of the consumer has a capacitive nature and the polarity of the voltage terminals of the windings changes, the axis of the reactive energy counter rotates in the same direction specified by the arrow. Through the closed contact 10, the output 8.2 of the phase comparator is energized on the control circuits 6.3 and 7.3, which include counting mechanisms 6.2 and 7.

2. The generation of reactive power by the consumer is reconstructed by a counting mechanism 6.2 of the counter 6 of reactive energy, and the time for the existence of the mode of generating reactive power is calculated by a counting mechanism 7.2 of the counter 7 of time. Thus, the generation device and the consumption of reactive energy are taken into account by different counting mechanisms of the counter 6, in which the axis always rotates in a given direction regardless of the nature of the load of consumed electrical energy, and the time of generation and consumption of reactive power by the consumer is taken into account by two counting mechanisms of the counter 7; Such a device uses only one reactive energy counter and one time counter, the utilization rate of which is increased. The accuracy of measuring the generated and consumed reactive energy, as well as the accuracy of taking into account the time of generation and consumption of reactive energy is determined by the accuracy of only one corresponding meter. The invention is a device for controlling modes of consumption and generation of reactive power, containing a reactive energy meter, three power converters in series in a power supply circuit and two voltage converters in parallel, a time counter, a phase comparator with two groups of open contacts, and a reactive counter energy input terminals of the current windings are connected to the first terminals of the secondary windings of three current transducers, the second terminals of which are connected to the first current terminals The phase comparator, the voltage windings of which are connected to the corresponding secondary windings of two voltage converters, to which the input terminals of both groups of open contacts of the phase of the comparator are also connected, the voltage winding and the first terminal of the current winding of the time counter are connected to the secondary winding, for example the second a voltage converter, similar to the fact that, in order to simplify the design of the device and increase its accuracy, a resistor is inserted into it, through which the second current terminal The time counter windings are connected to the secondary winding of the second voltage converter, and the reactive energy counter and the time counter are made with two counting mechanisms, the parallel control inputs of which are connected through the second group of open contacts of the phase comparator to the secondary winding of the second voltage converter, the output terminals of the first group of open the contacts of the phase comparator are connected to the windings of the voltage of the reactive energy meter so that the specified rotation of the axis ensures axle with inductive load, and the second group of terminals vkodnye open contacts of the phase comparator so that a predetermined rotation axis reactive energy meter was provided with capacitive load, the second current terminals of the phase comparator is connected respectively to the second terminals of the three secondary windings of the current transducers.

cfiue.2