CN203151100U

CN203151100U - Reactive power compensation devicec

Info

Publication number: CN203151100U
Application number: CN 201220717494
Authority: CN
Inventors: 徐瑞新; 陈平; 郭晓爽
Original assignee: Shanghai Huaai Software Co Ltd
Current assignee: Shanghai Huaai Software Co Ltd
Priority date: 2012-12-24
Filing date: 2012-12-24
Publication date: 2013-08-21
Anticipated expiration: 2022-12-24

Abstract

The utility model provides a reactive power compensation device which comprises a wave recording module. When the reactive power compensation device is put into operation, exits operation, is tested or breaks down, the wave recording module records waves so as to obtain wave recording data. The reactive power compensation device provided by the utility model can be used for correcting and checking the time for inputting and removing the reactive power compensation device because of the function of wave recording, thereby actually realizing that the reactive power compensation device is inputted when AC voltage waves cross the zero point, and the reactive power compensation device is removed when AC current waves cross the zero point, being capable of not only reducing impacts imposed on a power grid and the reactive power compensation device during switching, but also prolonging the service life of the reactive power compensation device greatly.

Description

Reactive power compensator

Technical field

The utility model relates to field of power electronics, particularly relates to reactive power compensator.

Background technology

Because the develop rapidly of power electronic technology, the nonlinear characteristic of industrial or agricultural electrical load, particularly communications and transportation, civilian electricity consumption product is on the rise, and user's power factor also descends day by day, thereby reactive power compensator is used more and more widely.

The extensive application that has nonlinear characteristic equipment along with frequency converter, rectifying device, computer and household electrical appliance etc., the humorous wave interference of electrical network also is on the rise, it causes very big negative effect to reactive power compensator, harmonic wave easily makes the reactance on reactive power compensator and the electrical network produce resonance, causes the damage of reactive power compensator.Reactive power compensator has been taked following measure for this reason:

1) reactor of series connection 7% or 14% is to avoid common five times or third harmonic interference;

2) install the too high protection of harmonic component additional, when harmonic component is too high, report to the police;

3) install overheat protector additional, warning or out of service when temperature is too high.

Simultaneously, in order to reduce reactive power compensator impact to electrical network when dropping into and withdrawing from electrical network, selected following technology for use:

1) when alternating voltage ripple zero crossing, drops into reactive power compensator, can avoid it to the voltge surge of electrical network and reactive power compensator;

2) excision reactive power compensator when alternating current ripple zero crossing can avoid it to the rush of current of electrical network and reactive power compensator.

But above technical measures can't be verified in running, namely, whether realized really that reactive power compensator is also unknown to the voltage and current impact size of electrical network in operating passing zero reactive power compensator, the switching process, thereby caused to analyze and improving the actual operating state of reactive power compensator.

The utility model content

In view of above-mentioned, be necessary to propose a kind of reactive power compensator with record wave energy at the existing problem that can't analyze and improve the actual operating state deficiency of reactive power compensator.

A kind of reactive power compensator comprises record mode piece, and wherein, when reactive power compensator puts into operation, when out of service, during test or during fault, described record mode piece is recorded ripple to obtain recorder data.

In execution mode, described recorder data is current waveform, voltage waveform and temperature curve therein.

In execution mode, described record mode piece comprises therein:

Sampling unit is in order to sample to obtain sampled data to electric current, voltage, temperature;

Storage element couples described sampling unit, in order to store described sampled data.

Therein in execution mode, described reactive power compensator also comprises communication module, be coupled to described record mode piece, in order to transmitting described recorder data and reactive power compensator real-time running data to reactive controller, and in order to transmit the control command that described reactive controller sends.

In execution mode, described communication module is also in order to transmit described recorder data and reactive power compensator real-time running data to external electronic or outside service systems therein.

Therein in execution mode, described communication module is one of them or its combination of wireless communication module, usb communication module, ethernet communication module.

In execution mode, described reactive power compensator also comprises analysis module, couples described record mode piece therein, in order to analyze following operation conditions according to recorder data:

Drop into reactive power compensator when 1) whether being alternating voltage ripple zero crossing;

Excision reactive power compensator when 2) whether being alternating current ripple zero crossing;

Electric current and voltge surge amount when 3) dropping into reactive power compensator;

Electric current and voltge surge amount when 4) excising reactive power compensator;

5) drop into reactive power compensator when not being the voltage wave zero crossing, can measure the alternating voltage angle when dropping into reactive power compensator;

6) as be not current wave zero crossing time excision reactive power compensator, the alternating current angle in the time of can measuring the excision reactive power compensator;

When 7) reactive power compensator drops into and withdraws from and during plant failure, the voltage and current waveform that passes through to record can be analyzed power supply each harmonic content; And (deletion)

When 8) reactive power compensator drops into and withdraws from and the temperature waveform during plant failure.

As from the foregoing, the reactive power compensator that the utility model proposes, owing to have the record wave energy, can be used for proofreading and correct and checking the time of reactive power compensator input and excision, excision reactive power compensator when dropping into reactive power compensator and alternating current ripple zero crossing when reaching real realization alternating voltage ripple zero crossing, thereby to the impact of electrical network and reactive power compensator, and can prolong useful life of reactive power compensator greatly in the time of both switching can being reduced.

In addition, the record ripple during according to fault (current waveform during fault, voltage waveforms, harmonic component, temperature curve) can help accident analysis, to assist the failure judgement reason and to formulate the troubleshooting scheme.

Again, because reactive power compensator also has communication module, can transmit reactive power compensator real-time running data and recorder data to reactive controller or other external electronic and system, in order to verify reactive power compensator throwing, the operation conditions when cutting, carry out accident prediction and analysis and handling failure.

Description of drawings

Fig. 1 has illustrated the block diagram of the reactive power compensator of the utility model one execution mode.

Embodiment

In order to make the relevant technical staff in the field understand the technical solution of the utility model better, accompanying drawing below in conjunction with the utility model execution mode, technical scheme in the utility model execution mode is clearly and completely described, obviously, described execution mode only is the utility model part execution mode, rather than whole execution modes.

About occurring " coupling " herein, can refer to the direct connection of two modules (or unit), also can refer to the indirect connection of two modules (or unit), namely also there is other module (or unit) between two modules (or unit).

With reference to Fig. 1, Fig. 1 has illustrated the block diagram of the reactive power compensator of the utility model one execution mode.

As shown in Figure 1, reactive power compensator 100 comprises record mode piece 110, communication module 120 and analysis module 130.

For record mode piece 110, when reactive power compensator 100 puts into operation, when out of service, when when test or fault, at this moment, then record mode piece 110 and can record ripple to obtain recorder data, preferably, this recorder data is current waveform, voltage waveform and temperature curve.

As shown in Figure 1, record mode piece 110 comprises sampling unit 112, storage element 114.Wherein, sampling unit 112 is in order to sample to obtain sampled data to electric current, voltage, temperature; Storage element 114 couples sampling unit 112, in order to the store sampled data.

For example, voltage, electric current, temperature are sampled with 64 sampling points of per second, preserve the sample (preserving as adopting with the principle of first in first out) of 10 cycles, when conforming to following condition:

When 1) reactive power compensator puts into operation;

When 2) reactive power compensator is out of service;

3) during the reactive power compensator fault;

When 4) the reactive power compensation dress is tested (when satisfying test request);

The following waveform that involves back three cycles when at this moment, then locking reactive power compensator 100 and drop into, when when withdrawing from, fault, during test preceding two week:

1) current waveform;

2) voltage waveforms;

3) temperature curve.

In addition, record mode piece 110 can record 20 record ripples of above three kinds of waveforms, is stored in the storage element 114 with first-in first-out.

It should be noted that, above-mentioned per second sampling point number, sample cycle number, and record ripple number of times only be the example explanation, not as limit, can arrange flexibly according to demand.

Communication module 120, be coupled to record mode piece 110, in order to transmitting recorder data and reactive power compensator 100 real-time running datas to reactive controller (not illustrating), and, can also be used to transmitting the control command that reactive controller sends, with the control reactive power compensator.

In addition, communication module 120 is also in order to transmit recorder data and reactive power compensator 100 real-time running datas to external electronic or outside service systems, such as, transfer to device or systems such as notebook computer, electric power monitoring system, to carry out subsequent treatment, such as, throw, operation conditions when cutting, carry out accident prediction and analysis and handling failure and use with checking reactive power compensator 100.

In the present embodiment, communication module 114 is one of them or its combination of wireless communication module, usb communication module, ethernet communication module.

Analysis module 130 couples record mode piece 110, in order to analyze following operation conditions according to recorder data:

Drop into reactive power compensator 100 when 1) whether being alternating voltage ripple zero crossing;

Excision reactive power compensator 100 when 2) whether being alternating current ripple zero crossing;

Electric current and voltge surge amount when 3) dropping into reactive power compensator 100;

Electric current and voltge surge amount when 4) excising reactive power compensator 100;

5) drop into reactive power compensator 100 when not being the voltage wave zero crossing, can measure the alternating voltage angle when dropping into reactive power compensator 100;

6) as be not current wave zero crossing time excision reactive power compensator 100, the alternating current angle in the time of can measuring excision reactive power compensator 100;

When 7) reactive power compensator 100 drops into and withdraws from and during plant failure, the voltage and current waveform that passes through to record can be analyzed power supply each harmonic content; And

When 8) reactive power compensator 100 drops into and withdraws from and the temperature waveform during plant failure.

In the present embodiment, can be according to above-mentioned 5) and 6) proofread and correct and check reactive power compensator 100 to drop into and time of excision, excision reactive power compensator 100 when dropping into reactive power compensator 100 and alternating current ripple zero crossing when reaching real realization alternating voltage ripple zero crossing, thereby to the impact of electrical network (not illustrating) and reactive power compensator 100, and can prolong useful life of reactive power compensator greatly in the time of both switching can being reduced.

Below only expressed execution mode of the present utility model, it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.

Claims

1. a reactive power compensator is characterized in that, comprising: record mode piece, communication module;

Record mode piece, when reactive power compensator puts into operation, when out of service, during test or during fault, described record mode piece is recorded ripple to obtain recorder data;

Communication module is coupled to described record mode piece, in order to transmitting described recorder data and reactive power compensator real-time running data to reactive controller, and in order to transmit the control command that described reactive controller sends;

Described recorded broadcast module comprises:

Sampling unit is in order to sample to obtain sampled data to electric current, voltage, temperature; And

2. reactive power compensator according to claim 1 is characterized in that, described communication module is also in order to transmit described recorder data and reactive power compensator real-time running data to external electronic or outside service systems.

3. reactive power compensator according to claim 1 is characterized in that, described communication module is one of them or its combination of wireless communication module, usb communication module, ethernet communication module.