CN201464596U

CN201464596U - Electronic transducer polarity detecting system

Info

Publication number: CN201464596U
Application number: CN200920097870XU
Authority: CN
Inventors: 韩乃强; 徐科; 邢立功; 赵庆来; 孙哲; 王子斌; 刘钺; 解岩
Original assignee: Tianjin Electric Power Corp
Current assignee: Tianjin Electric Power Corp
Priority date: 2009-07-22
Filing date: 2009-07-22
Publication date: 2010-05-12
Anticipated expiration: 2019-07-22

Abstract

The utility model relates to an electronic transducer polarity detecting system, consisting of a voltage regulator, an exciting transformer, a slide-transformer-type series reactor, a current-rising device, a standard PT, a standard CT and a phase meter which are connected, wherein the output ends of the standard PT and the standard CT are respectively connected with the two input ends of the phase meter; and the utility model is technically characterized in that the output end of the slide-transformer-type series reactor is also connected with an EVT to be detected, the EVT to be detected is connected with one input end of a combiner by a voltage combiner, the current-rising device is also connected with the EVT to be detected, the output end of the EVT to be detected is connected with the other input end of the combiner, and the three output ends of the combiner is respectively connected with IED devices, such as a line protective device, a transformer protection device, an oscillograph and the like. The utility model has reasonable design, solves the problem that the polarity of the electronic transducer can not be detected when the digital transformer station is put into operation and maintained and the traditional transformer substation is modified, ensures the reliable operation of the transformer substation system, and has the characteristic of simple, convenient, fast and reliable operation.

Description

Polarity detection system of electronic transformer

Technical field

The utility model belongs to the digital transformer substation field, is particularly useful for polarity detection system of electronic transformer.

Background technology

At present, electromagnetic transformer is the important electrical equipment in traditional transformer substation system, and it is bearing isolation between the high and low pressure system and the high pressure amount function to the conversion of low pressure amount.Whether correct operate as normal to equipment such as the protection in the transformer substation system, measurement, meterings has extremely important meaning in the wiring of electromagnetic transformer.Electromagnetic transformer comprises current transformer (CT) and voltage transformer (VT) (PT), in traditional converting station debugging process, when new installation electromagnetic transformer puts into operation and changes the electromagnetic transformer secondary cable, whether the wiring that all should detect current transformer (CT) and voltage transformer (VT) (PT) is correct, to guarantee the normal operation of transformer substation system.Detect the electromagnetic transformer wiring and whether correctly adopt polarity detection circuit usually, for example: pointer multimeter is connected on the Current Transformer Secondary output winding, this multimeter is located at shelves of direct voltage, with the negative pole and anodal being connected on respectively on the input and output lead of current transformer of power circuit, determine by the indicator offset direction of observing multimeter whether the polarity of current transformer is correct.

Along with developing rapidly of digital transformer substation, comprise that the electronic mutual inductor of electronic current mutual inductor (ECT) and electronic type voltage transformer (EVT) is widely used in the digital transformer substation system.Because electronic mutual inductor has been abandoned traditional Secondary Winding, and Luo-coil that adopts and analog to digital conversion (data acquisition unit) transfer to each device through optical cable, and traditional mutual inductor polarity detection method can not be made detection to the polarity of electronic mutual inductor.Therefore, press for a kind of system that can detect electronic mutual inductor polarity.

Summary of the invention

Be to overcome the deficiencies in the prior art order of the present utility model, propose a kind of reliable polarity detection system of electronic transformer that also can effectively guarantee the digital transformer substation system operate as normal reasonable in design, easy to use.

The utility model solves its technical matters and takes following technical scheme to realize:

A kind of polarity detection system of electronic transformer; by pressure regulator; excitation becomes; the induction-regulated current-limiting reactor; up-flow equipment; standard P T; standard CT and phase meter connect and compose; pressure regulator; excitation becomes; the induction-regulated current-limiting reactor; standard P T is connected successively; up-flow equipment is connected with standard CT; the output terminal of standard P T and standard CT is connected respectively to two input ends of phase meter; the output terminal of induction-regulated current-limiting reactor is also connected on the EVT to be measured; this EVT to be measured is connected with an input end of combiner by the voltage combiner; up-flow equipment is also connected on the ECT to be measured; the output terminal of ECT to be measured is connected on another input end of combiner, three output terminals of this combiner respectively with line protective devices; protection equipment for transformer is connected with oscillograph.

And described line protective devices, protection equipment for transformer and oscillograph are to have the IED intelligent electronic device that current phase and waveform are checked function.

Advantage of the present utility model and good effect are:

1, be connected with at the output terminal of standard P T and standard CT can display standard PT and the phase meter of standard CT voltage-phase and current phase for this detection system, output terminal at EVT to be measured and ECT to be measured is connected with the IED intelligent electronic devices such as oscillograph that can show EVT to be measured and ECT voltage-phase to be measured and current phase, whether just can judge the electric mutual inductor wiring that inserts in the detection system by the phase equalization of phase meter and oscillograph demonstration correct, thereby detect the polarity of EVT to be measured and ECT to be measured intuitively, it is simple to operate, accurately and reliably.

2, the utility model is reasonable in design, solved electric mutual inductor digital transformer substation system put into operation, safeguard and traditional transformer station transformation process in, electric mutual inductor can't detect the problem of polarity, guarantee the reliability service of transformer substation system, had simple, convenient, fast, the reliable characteristics of use.

Description of drawings

Fig. 1 is a system of the present utility model connection diagram.

Embodiment

Be described in detail embodiment of the present utility model below in conjunction with accompanying drawing:

A kind of polarity detection system of electronic transformer; as shown in Figure 1; by pressure regulator; excitation becomes; the induction-regulated current-limiting reactor; up-flow equipment; standard P T; standard CT; phase meter; EVT to be measured; ECT to be measured; the voltage combiner; combiner; line protective devices; protection equipment for transformer and fault oscillograph connect and compose; pressure regulator; excitation becomes; the induction-regulated current-limiting reactor is connected successively with standard P T; up-flow equipment is connected with standard CT; the output terminal of standard P T and standard CT is connected with two input ends of phase meter respectively, and this phase meter can display standard PT and the voltage-phase and the current phase of standard CT.The output terminal of induction-regulated current-limiting reactor is also connected on the EVT to be measured; this EVT to be measured is connected with an input end of combiner by the voltage combiner; up-flow equipment is also connected on the ECT to be measured; the output terminal of ECT to be measured is connected to another input end of combiner; three output terminals of this combiner are connected respectively on line protective devices, protection equipment for transformer and the oscillograph; this oscillograph is to have the oscillograph that multichannel current phase and waveform are checked function, and IED devices such as this oscillograph can show voltage-phase and the current phase of EVT to be measured and ECT to be measured.

Principle of work of the present utility model is as follows: regulate the induction-regulated current-limiting reactor and make and add hydraulic circuit resonance and be under the 50HZ frequency, once add rated voltage at EVT to be measured, add 0.2～0.5 times rated current again after once adding rated voltage, can demonstrate the voltage-phase and the current phase of standard P T and standard CT by phase meter; On oscillograph, can demonstrate simultaneously voltage-phase and the current phase of EVT to be measured and ECT to be measured, if the phase place that oscillograph shows is identical with the phase place that phase meter shows, illustrate that then EVT to be measured and ECT wiring to be measured are correct, if 180 ° of the phasic differences mutually of the phase place that oscillograph shows and phase meter demonstration then illustrate EVT to be measured and ECT wiring error to be measured.This testing circuit inserts the polarity whether the electric mutual inductor wiring in the detection system correctly comes to detect intuitively EVT to be measured and ECT to be measured by judging.

It is emphasized that; embodiment described in the utility model is illustrative; rather than it is determinate; therefore the utility model is not limited to the embodiment described in the embodiment; every by those skilled in the art according to other embodiments that the technical solution of the utility model draws, belong to the scope of the utility model protection equally.

Claims

1. polarity detection system of electronic transformer; by pressure regulator; excitation becomes; the induction-regulated current-limiting reactor; up-flow equipment; standard P T; standard CT and phase meter connect and compose; pressure regulator; excitation becomes; the induction-regulated current-limiting reactor; standard P T is connected successively; up-flow equipment is connected with standard CT; the output terminal of standard P T and standard CT is connected respectively to two input ends of phase meter; it is characterized in that: the output terminal of induction-regulated current-limiting reactor is also connected on the EVT to be measured; this EVT to be measured is connected with an input end of combiner by the voltage combiner; up-flow equipment is also connected on the ECT to be measured; the output terminal of ECT to be measured is connected on another input end of combiner, three output terminals of this combiner respectively with line protective devices; protection equipment for transformer is connected with oscillograph.

2. polarity detection system of electronic transformer according to claim 1 is characterized in that: described line protective devices, protection equipment for transformer and oscillograph are to have the IED intelligent electronic device that current phase and waveform are checked function.