CN103217569B - The real-time current diagnostic method of intelligent substation homology SMV sample information and equipment - Google Patents

The real-time current diagnostic method of intelligent substation homology SMV sample information and equipment Download PDF

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CN103217569B
CN103217569B CN201310163109.2A CN201310163109A CN103217569B CN 103217569 B CN103217569 B CN 103217569B CN 201310163109 A CN201310163109 A CN 201310163109A CN 103217569 B CN103217569 B CN 103217569B
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sample information
current
amplitude
groups
real
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CN201310163109.2A
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CN103217569A (en
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邹国惠
翁奕珊
罗奕飞
丘冠新
黄培专
胡云花
王力伟
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广东电网公司珠海供电局
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Abstract

The invention discloses real-time current diagnostic method and the equipment of intelligent substation homology SMV sample information.This current diagnostic method, comprising: the sample information gathering the current transformer of different group on same feeder line; The wherein amplitude of the described sample information that the range of two groups of current transformer acquisitions is identical, and send alarm signal according to the electric current verification criterion preset.Adopt the present invention, can in electronic mutual inductor operational process On-line sampling system deviation, substantially increase electronic mutual inductor reliability of operation and security in intelligent substation.

Description

The real-time current diagnostic method of intelligent substation homology SMV sample information and equipment

Technical field

The present invention relates to SMV Sampling techniques, particularly relate to real-time current diagnostic method and the equipment of intelligent substation homology SMV sample information.

Background technology

In the construction of intelligent grid, adopt electronic mutual inductor in a large number, therefore, can the reliability of electronic mutual inductor, stability become intelligent grid the key of large-scale promotion.Because current electronic mutual inductor making time is not long, its reliability, stability, accuracy are not extensively approved and are verified yet, special in the metering of electric system, the field of charging, owing to not obtaining the certification of national departments concerned, electronic mutual inductor still cannot be used for the charging field of electric system.

Meanwhile, electronic mutual inductor is after putting into operation, and due to the impact of the factors such as environment temperature, surrounding enviroment, electromagnetic interference (EMI), product quality, its reliability, stability still exist certain problem.In once occurred many electronic mutual inductors after the putting into operation detection of a year, find that larger change appears in its important parameter such as angular difference, ratio, even occur the major defect that error exceeds standard.Because the domestic and international search time to electronic mutual inductor is long not enough, particularly the practice of linked network is inadequate, so the operating experience of accumulation is very limited.Applying of electronic mutual inductor also needs to make much arduous, elaborations, particularly the various factors of electronic mutual inductor long-time running reliability, stability, reliability affects the fiduciary level of product, be presented as that electronic mutual inductor is after a period of time of putting into operation, situation about even exceeding standard appears that error strengthens, in its important index (as angular difference, ratio etc.).

Summary of the invention

Based on this, be necessary for the problems referred to above, a kind of real-time current diagnostic method and equipment of intelligent substation homology SMV sample information are provided, can in electronic mutual inductor operational process On-line sampling system deviation, substantially increase electronic mutual inductor reliability of operation and security in intelligent substation.

A real-time current diagnostic method for intelligent substation homology SMV sample information, comprising:

Gather the sample information of the current transformer of different group on same feeder line;

The wherein amplitude of the described sample information that the range of two groups of current transformer acquisitions is identical, and send alarm signal according to the electric current verification criterion preset.

Correspondingly, a kind of real-time current diagnostic device of intelligent substation homology SMV sample information, comprising:

The current transformer of the difference group that same feeder line is arranged, for gathering sample information; At least two group current transformers are connected with inline diagnosis instrument by network, and described inline diagnosis instrument is used for the amplitude of the identical described sample information of range that wherein two groups of current transformers obtain, and sends alarm signal according to the electric current verification criterion preset.

Correspondingly, a kind of foregoing inline diagnosis instrument, comprising: amplitude com parison unit, the amplitude of the described sample information that the range for wherein two groups of current transformer acquisitions is identical; The alarm unit be connected with described amplitude com parison unit, for sending alarm signal according to the electric current verification criterion preset; Wherein, also comprise:

The time delay comparing unit be connected respectively with described amplitude com parison unit, described alarm unit, for according to the delay time preset, every the described delay time amplitude of described sample information that obtains of more described two groups of analog acquisition unit again.

Implement the present invention, there is following beneficial effect:

Type approval test, the test that networks, factory inspection, new equipment installation inspection etc. that prior art is carried out electronic mutual inductor, all need electronic mutual inductor at power down mode, carry out under namely departing from electrical network, state out of service.But dropping into after operation of power networks at electronic mutual inductor, is extremely difficultly arranged power failure, even if having ready conditions, is also very long cycle.Therefore, diagnostic method of the present invention, can effectively solve because the parts such as source of electronic mutual inductor are in actual motion, the problem that the measuring error (as angular difference, ratio etc.) caused due to the humiture of surrounding environment, vibrations skew, electromagnetic interference (EMI), product quality problem strengthens, even if the increase of this error is slow, a progressive process, as long as the error produced exceedes the alarming value of setting, get final product real-time automatic alarm, easy access personnel carry out inspection verifying work to electronic mutual inductor further.Promote that electronic mutual inductor is stable, the fiduciary level for product quantizes to provide theoretical and test basis.

Accompanying drawing explanation

Fig. 1 is the process flow diagram of the real-time current diagnostic method of a kind of intelligent substation homology SMV of the present invention sample information;

Fig. 2 is the schematic diagram of the real-time current diagnostic device of a kind of intelligent substation homology SMV of the present invention sample information;

Fig. 3 is the structural representation of a kind of inline diagnosis instrument of the present invention.

Embodiment

For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.

Fig. 1 is the process flow diagram of the real-time current diagnostic method of a kind of intelligent substation homology SMV of the present invention sample information, comprising:

S101: the sample information gathering the current transformer of different group on same feeder line;

S102: the wherein amplitude of the described sample information that the range of two groups of current transformer acquisitions is identical, and send alarm signal according to the electric current verification criterion preset.

Fig. 2 is the schematic diagram of the real-time current diagnostic device of a kind of intelligent substation homology SMV of the present invention sample information.Below in conjunction with Fig. 1, Fig. 2, the present invention will be further described.

Protection producer is for preventing electronic mutual inductor after acquisition, transfer in the process of digital quantity by analog quantity, occur because the reason such as component damage of remote end module occurs that sampled value is abnormal, and cause the serious problems such as false protection, the method that double A/D is sampled is taked in remote end module, namely the analog quantity on same road adopts the pattern of two sampling, draw two groups of identical digital quantities, one of them digital quantity for the protection of enable logic, another digital quantity is for the protection of the arithmetic logic of logical program, two digital quantities mutually compare and proofread in protective device, once there is inconsistent situation, latch-up protection, and report to the police, this method solve electronic mutual inductor when analog quantity transfers digital quantity to, because data conversing circuits causes the serious consequence of false protection extremely.But said method cannot solve the source (i.e. collecting part) due to electronic mutual inductor, be embodied as Luo Si coil, low-power coil, magneto-optic glass, the parts such as Fibre Optical Sensor are due to the humiture of surrounding environment, vibrations skew, electromagnetic interference (EMI), the problem that product quality problem causes, and the generation of this problem is one slow, progressive process, be presented as that electronic mutual inductor is after a period of time of putting into operation, its important index is (as angular difference, ratio etc.) occur that error strengthens, situation about even exceeding standard, this problem can not be summed up as again the damage of electronic mutual inductor simply.

Due in digital transformer substation, same switch gap is provided with the electronic mutual inductor of two groups or more simultaneously, and these two groups of electronic mutual inductors are completely independent, and the main I and the main II that are respectively used to same switch gap protect; Or in same switch gap, adopt electronic mutual inductor to add the configuration mode of routine transformer, owing to all picking up from same switch gap, an analog quantity of above-mentioned two groups of electronic mutual inductor collections is identical, and in the ordinary course of things, no-load voltage ratio also should be identical.The present invention is based on this, gather the sample information of the current transformer of different group on same feeder line; The wherein amplitude of the described sample information of two groups of interior corresponding analog acquisition unit acquisitions of current transformers, and send alarm signal according to the electric current verification criterion preset.As shown in Figure 2, compare respectively to carrying out data between AD1 and AD4, AD2 and AD5, AD3 and AD6, corresponding two analog sampling unit, their range is identical, and sampling precision is consistent, is convenient to carry out data and compares.Consider the progress of disease error that TA, TV mono-or two times are intrinsic, and may measuring error be there is in different simulation A/D sampling unit, adopt the computing formula of the following electric current verification criterion preset.Computing formula can compare with reference to the amplitude of different two-way simulation A/D sampling, and obtains.

Gather the sample information of two groups of electronic current mutual inductors at same switch interval on same feeder line; Or,

Gather one group of electronic current mutual inductor at same switch interval on same feeder line and the sample information of one group of conventional current mutual inductor; Or,

Gather the sample information of two groups of conventional current mutual inductors at same switch interval on same feeder line.

In any case, the real-time automatic diagnosis that all can drop into the SMV sample information of the difference group electronic current mutual inductor of same switch gap is compared; The real-time automatic diagnosis that also can drop into one group of electronic current mutual inductor of same switch gap and the SMV sample information of one group of conventional current mutual inductor is compared.The present invention is based on the SMV sample information diagnostic method of Homology search method, effectively can solve source (the i.e. collecting part due to electronic mutual inductor, as Luo Si coil, magneto-optic glass, Fibre Optical Sensor) etc. parts in actual motion, due to the humiture of surrounding environment, vibrations skew, electromagnetic interference (EMI), the measuring error that product quality problem causes is (as angular difference, ratio etc.) problem that strengthens, even if the increase of this error be one slowly, progressive process, as long as the error produced exceedes the alarming value of setting, get final product real-time automatic alarm, be convenient to notify that maintainer carries out inspection verifying work to electronic mutual inductor further.

The invention solves electronic mutual inductor to be in operation the problem of Real-Time Monitoring error, automatic alarm, greatly improve intelligent substation reliability of operation and security.The mark of intelligent grid adopts electronic mutual inductor in a large number, and therefore, can the reliability of electronic mutual inductor, stability become intelligent grid the key of large-scale promotion.Because current electronic mutual inductor making time is not long, its reliability, stability, accuracy are not extensively approved and are verified yet, special in the metering of electric system, the field of charging, owing to not obtaining the certification of national departments concerned, electronic mutual inductor still cannot be used for the charging field of electric system.Simultaneously, electronic mutual inductor is after putting into operation, due to the impact of the factors such as environment temperature, surrounding enviroment, electromagnetic interference (EMI), product quality, still there is certain problem in its reliability, stability, in once occurred many electronic mutual inductors of a digital transformer substation after the putting into operation detection of a year, find that extensive change appears in its important parameter such as angular difference, ratio, so the major defect that error exceeds standard.

The present invention is that the Large scale construction of intelligent substation and operation provide possibility.Promote carrying out of the research work of electronic mutual inductor operational reliability, stability simultaneously, the fiduciary level of product quantized, practical, marketing development for product provide theoretical and test basis.

According to the delay time preset, every the described delay time amplitude of described sample information that obtains of more described two groups of analog acquisition unit again.

The method of real-time relative error can be carried out under system normal condition, by setting a time delay to avoid the flase drop of the system failure.Preferably, detection time due to the system failure is 0.1 second, therefore the time delay of mutual inductor of can adjusting is 0.5 second, and the check results that namely two-way compares in real time automatically continues 0.5 second, so that compartment system fault and mulual inductor malfunction, the operating existing problems of Timeliness coverage mutual inductor.

Choose the analog acquisition unit of metering group in described two groups of current transformers; Contrast in rated current limits, the amplitude of the described sample information that described analog acquisition unit obtains.

Real-time automatic diagnosis for the SMV sample information of metering group is compared, adjust in the rated current limits of TA, the real-time automatic diagnosis of automatic input, prevents when load exceeds TA rated current, and metering group SMV sampling error increases the false alarm under (genus normal condition).

Wherein in the middle of an embodiment, after gathering the step of the sample information of the current transformer of different group on same feeder line, can also comprise: the wherein amplitude of the sample information that two analog acquisition unit obtain in one group of current transformer, and send alarm signal according to the electric current verification criterion preset.

Fig. 3 is the structural representation of a kind of inline diagnosis instrument of the present invention.Different from the hardware configuration of Fig. 2, Fig. 3 mainly introduces the software module of inline diagnosis instrument inside.

A kind of foregoing inline diagnosis instrument, comprising: amplitude com parison unit, the amplitude of the described sample information that the range for wherein two groups of current transformer acquisitions is identical; The alarm unit be connected with described amplitude com parison unit, for sending alarm signal according to the electric current verification criterion preset; Wherein, also comprise:

The time delay comparing unit be connected respectively with described amplitude com parison unit, described alarm unit, for according to the delay time preset, every the described delay time amplitude of described sample information that obtains of more described two groups of analog acquisition unit again.

Wherein in the middle of an embodiment, described amplitude com parison unit, comprising:

Sample information transfers unit, for transferring the sample information of the analog acquisition unit of metering group in described two groups of current transformers;

Transferring with described sample information the rated current setting unit that unit is connected, for arranging rated current, contrasting in rated current limits, the amplitude of the described sample information that described analog acquisition unit obtains.

In the middle of another one embodiment, described sample information transfers unit, also comprises:

With group sampling comparing unit, for the amplitude of the sample information that two analog acquisition unit in wherein one group of current transformer obtain.

The method of operation as the software unit of Fig. 3 inline diagnosis instrument is identical with the method as described in Fig. 1.

In the middle of prior art, to type approval test, the test that networks, factory inspection, new equipment installation inspection etc. that electronic mutual inductor is carried out, all need electronic mutual inductor at power down mode, carry out under namely departing from electrical network, state out of service.But after electronic mutual inductor drops into operation of power networks, extremely difficult arrangement has a power failure, even if having ready conditions, is also 6 years one-periods, even longer.Therefore, based on the SMV sample information diagnostic method of Homology search method, effectively can solve source (the i.e. collecting part due to electronic mutual inductor, as Luo Si coil, magneto-optic glass, Fibre Optical Sensor) etc. parts in actual motion, due to the humiture of surrounding environment, vibrations skew, electromagnetic interference (EMI), the measuring error that product quality problem causes is (as angular difference, ratio etc.) problem that strengthens, even if the increase of this error be one slowly, progressive process, as long as the error produced exceedes the alarming value of setting, get final product real-time automatic alarm, be convenient to notify that maintainer carries out inspection verifying work to electronic mutual inductor further.

The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims (9)

1. a real-time current diagnostic method for intelligent substation homology SMV sample information, is characterized in that, comprising:
Gather the sample information of the current transformer of different group on same feeder line;
The wherein amplitude of the described sample information that the range of two groups of current transformer acquisitions is identical, and send alarm signal according to the electric current verification criterion preset, wherein, the wherein amplitude of the described sample information that the range of two groups of current transformer acquisitions is identical, comprise, choose the analog acquisition unit of metering group in described two groups of current transformers; Contrast in rated current limits, the amplitude of the described sample information that described analog acquisition unit obtains.
2. the real-time current diagnostic method of intelligent substation homology SMV sample information according to claim 1, is characterized in that, gathers the step of the sample information of the current transformer of different group on same feeder line, comprising:
Gather the sample information of two groups of electronic current mutual inductors at same switch interval on same feeder line; Or,
Gather one group of electronic current mutual inductor at same switch interval on same feeder line and the sample information of one group of conventional current mutual inductor; Or,
Gather the sample information of two groups of conventional current mutual inductors at same switch interval on same feeder line.
3. the real-time current diagnostic method of intelligent substation homology SMV sample information according to claim 1 and 2, is characterized in that, after the step of the wherein amplitude of the described sample information that the range that obtains of two groups of current transformers is identical, comprising:
According to the delay time preset, every the described delay time amplitude of described sample information that obtains of more described two groups of analog acquisition unit again.
4. the real-time current diagnostic method of intelligent substation homology SMV sample information according to claim 1 and 2, is characterized in that, after gathering the step of the sample information of the current transformer of different group on same feeder line, also comprises:
The wherein amplitude of the sample information that two analog acquisition unit obtain in one group of current transformer, and send alarm signal according to the electric current verification criterion preset.
5. a real-time current diagnostic device for intelligent substation homology SMV sample information, is characterized in that, comprising:
The current transformer of the difference group that same feeder line is arranged, for gathering sample information; At least two group current transformers are connected with inline diagnosis instrument by network, described inline diagnosis instrument is used for the amplitude of the identical described sample information of range that wherein two groups of current transformers obtain, and send alarm signal according to the electric current verification criterion preset, wherein, the wherein amplitude of the described sample information that the range of two groups of current transformer acquisitions is identical, comprise, choose the analog acquisition unit of metering group in described two groups of current transformers; Contrast in rated current limits, the amplitude of the described sample information that described analog acquisition unit obtains.
6. the real-time current diagnostic device of intelligent substation homology SMV sample information according to claim 5, is characterized in that, the current transformer of described difference group, comprising:
Two groups of electronic current mutual inductors at same switch interval on same feeder line; Or,
One group of electronic current mutual inductor at same switch interval and one group of conventional current mutual inductor on same feeder line; Or,
Two groups of conventional current mutual inductors at same switch interval on same feeder line.
7. the real-time current diagnostic device of intelligent substation homology SMV sample information according to claim 5, it is characterized in that, described inline diagnosis instrument comprises: amplitude com parison unit, the amplitude of the described sample information that the range for wherein two groups of current transformer acquisitions is identical; The alarm unit be connected with described amplitude com parison unit, for sending alarm signal according to the electric current verification criterion preset; Wherein, also comprise:
The time delay comparing unit be connected respectively with described amplitude com parison unit, described alarm unit, for according to the delay time preset, every the described delay time amplitude of described sample information that obtains of more described two groups of analog acquisition unit again.
8. the real-time current diagnostic device of intelligent substation homology SMV sample information according to claim 7, is characterized in that, described amplitude com parison unit, comprising:
Sample information transfers unit, for transferring the sample information of the analog acquisition unit of metering group in described two groups of current transformers;
Transferring with described sample information the rated current setting unit that unit is connected, for arranging rated current, contrasting in rated current limits, the amplitude of the described sample information that described analog acquisition unit obtains.
9. the real-time current diagnostic device of the intelligent substation homology SMV sample information according to claim 7 or 8, it is characterized in that, described sample information transfers unit, also comprises:
With group sampling comparing unit, for the amplitude of the sample information that two analog acquisition unit in wherein one group of current transformer obtain.
CN201310163109.2A 2013-05-06 2013-05-06 The real-time current diagnostic method of intelligent substation homology SMV sample information and equipment CN103217569B (en)

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