CN103116092B - A kind of Intelligent distribution transformer load test method and device - Google Patents
A kind of Intelligent distribution transformer load test method and device Download PDFInfo
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- CN103116092B CN103116092B CN201310024075.9A CN201310024075A CN103116092B CN 103116092 B CN103116092 B CN 103116092B CN 201310024075 A CN201310024075 A CN 201310024075A CN 103116092 B CN103116092 B CN 103116092B
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Abstract
The present invention relates to Intelligent distribution transformer load test method and device, spy relates to a kind of Intelligent distribution transformer load test method and device, belongs to substation transformer test field.The present invention is by docking two tested Intelligent distribution transformer high-pressure sides, be connected by mutual inductor between low-pressure side, and powered to two Intelligent distribution transformers by the secondary side of adjustable transformer, by the adjustment of adjustable transformer secondary side output voltage, the bringing onto load process of simulated intelligence substation transformer, solve and can not carry out short circuit operation due to Intelligent distribution transformer low-pressure side and the problem of load test can not be carried out, for the delivery test of Intelligent distribution transformer and type approval test provide reference.
Description
Technical field
The present invention relates to Intelligent distribution transformer load test method and device, spy relates to a kind of Intelligent distribution transformer load test method and device, belongs to substation transformer test field.
Background technology
Along with the intelligentized development of power distribution network, the intellectuality of substation transformer has become the important component part in the intelligent field of primary equipment.Intelligent distribution transformer is based on substation transformer and intelligent electronic device integrated design, and its structure as shown in Figure 1, high-low pressure extension line increases current transformer, high pressure three, low pressure three, gathers current signal; High-tension coil inside increases measures winding, realizes the measurement of voltage, is equivalent to voltage transformer (VT), gather HV voltage signal; Low pressure draws perforate on copper bar, is connected by lead-in wire; The extension line terminal of current transformer and voltage transformer (VT) etc. is all incorporated on the electric connector that is fixed on tank wall, by electric connector, signal is drawn by inside; Laying temperature meter on case lid, monitoring oil temperature.The generation of Intelligent distribution transformer proposes new problem to traditional substation transformer test method and means.
1) Intelligent distribution transformer needs the load test of substation transformer being carried out together with intelligent electronic device transformer, instead of carries out correlation test to independent substation transformer.
2) the way to take power major part of intelligent electronic device carries out power taking from substation transformer low-pressure side and 380V side, power after voltage transformation, thus result in substation transformer low-pressure side and can not carry out short circuit operation, and then the testing program of short circuit low-pressure side is needed to propose infeasibility for short circuit fictitious load method etc.
Summary of the invention
For the deficiency of background technology, the present invention is by docking two tested Intelligent distribution transformer high-pressure sides, be connected by mutual inductor between low-pressure side, and powered to two Intelligent distribution transformers by the secondary side of adjustable transformer, by the adjustment of adjustable transformer secondary side output voltage, the bringing onto load process of simulated intelligence substation transformer, solve and can not carry out short circuit operation due to Intelligent distribution transformer low-pressure side and the problem of load test can not be carried out, for the delivery test of Intelligent distribution transformer and type approval test provide reference.
Technical scheme of the present invention is:
A kind of Intelligent distribution transformer load testing apparatus, comprise the first Intelligent distribution transformer, second Intelligent distribution transformer and adjustable transformer, the high-pressure side A of the first Intelligent distribution transformer, B, the high-pressure side A of C three-phase and the second Intelligent distribution transformer, B, C tri-is connected, it is characterized in that: the low-pressure side a of the first described Intelligent distribution transformer, b, c three-phase, the low-pressure side a of the second Intelligent distribution transformer, b, c three-phase respectively with the high-pressure side A of adjustable transformer, B, C tri-is connected, at the first Intelligent distribution transformer and the second Intelligent distribution transformer low-pressure side a, b, a phase mutual inductor is connected in series between c, b phase mutual inductor and c phase mutual inductor.Its beneficial effect is: constitute symmetrical test loop by high-tension side, simultaneously by the low-pressure side voltage of adjustment adjustable transformer, and then can be realized as fictitious load method etc. needs the testing program of short circuit low-pressure side by mutual load method.
Intelligent distribution transformer load testing apparatus as above, is characterized in that: the voltage regulation limits of the secondary side of adjustable transformer is: 0-380V.Its beneficial effect is: in 0-380V adjustment process, carry out fictitious load rate increases 100% process from 0.
Intelligent distribution transformer load testing apparatus as above, is characterized in that: the first Intelligent distribution transformer is identical with the nameplate parameter of the second Intelligent distribution transformer.Its beneficial effect is: define symmetrical load object, solves the load change that three-phase imbalance causes.
Intelligent distribution transformer load testing apparatus as above, is characterized in that: the first Intelligent distribution transformer and the second Intelligent distribution transformer make their its loads each other mutually in fictitious load process, and load factor is on all four.Its beneficial effect is: the data solving load testing calculate the data that a phase can obtain other two-phases.
Intelligent distribution transformer load testing apparatus as above, is characterized in that: the data that self IED of the first Intelligent distribution transformer and the second Intelligent distribution transformer measures are mutual inductor measurement data of a, b, c three-phase being connected on the first Intelligent distribution transformer and the second Intelligent distribution transformer low-pressure side is reference.Its beneficial effect is: the data for load test calculate and provide reference.
Intelligent distribution transformer load testing apparatus as above, it is characterized in that: the first described Intelligent distribution transformer comprises the first intelligent electronic device and forms, second Intelligent distribution transformer comprises the second intelligent electronic device and forms, high-pressure side A, B, C tri-of A, B, C three-phase respectively with the first Intelligent distribution transformer of intelligent electronic device is connected, and low-pressure side a, b, c tri-of a, b, c three-phase respectively with the first Intelligent distribution transformer of intelligent electronic device are connected; High-pressure side A, B, C tri-of A, B, C three-phase respectively with the second Intelligent distribution transformer of intelligent electronic device is connected, and low-pressure side a, b, c tri-of a, b, c three-phase respectively with the second Intelligent distribution transformer of intelligent electronic device are connected.
A kind of Intelligent distribution transformer load test method, is characterized in that: comprise following steps:
Step one: two Intelligent distribution transformer high-pressure sides A, B, C are connected, and the intelligent electronic device in each Intelligent distribution transformer connects with this Intelligent distribution transformer input-output line respectively;
Step 2: at two Intelligent distribution transformer low-pressure side a, be connected in series mutual inductor respectively between b, c, and be connected with the high-pressure side of adjustable transformer respectively;
Step 3: each phase voltage of adjustment adjustable transformer secondary side, then two each phase currents of Intelligent distribution transformer can linear change.
Its beneficial effect is: state when this state meets load running, can simulate this two load-carrying processes of Intelligent distribution transformer, carry out load test.
Intelligent distribution transformer load test method as above, is characterized in that: the nameplate parameter of two Intelligent distribution transformers of described step one is identical.Its beneficial effect is: the data solving load testing calculate the data that a phase can obtain other two-phases.
Accompanying drawing explanation
Fig. 1 Intelligent distribution transformer structural drawing;
Fig. 2 is field load test connection figure of the present invention.
Embodiment
Reference numeral: the 1-the first Intelligent distribution transformer, 2-the second Intelligent distribution transformer, 3-the first substation transformer, 4-the first intelligent electronic device, the 5-the second substation transformer, the 6-the second intelligent electronic device, 7-low-pressure side voltage transformer, 8-a phase mutual inductor, 9-b phase mutual inductor, 10-c phase mutual inductor.
Below in conjunction with accompanying drawing, the present invention will be further described.
First substation transformer 3 and the first intelligent electronic device 4 form the first Intelligent distribution transformer 1, second substation transformer 5 and the second intelligent electronic device 6 forms the second Intelligent distribution transformer 2; Adjustable transformer 7 is for regulating the low-pressure side voltage of the first Intelligent distribution transformer 1 and the second Intelligent distribution transformer 2.
As shown in Figure 2, the low-pressure side a of the first Intelligent distribution transformer 1, b, c three-phase, the low-pressure side a of the second Intelligent distribution transformer 2, b, c three-phase are connected with high-pressure side A, B, C tri-of adjustable transformer 7, and are connected in series a phase mutual inductor, b phase mutual inductor and c phase mutual inductor betwixt.High-pressure side A, B, C three-phase of the first Intelligent distribution transformer 1 is connected with high-pressure side A, B, C tri-of the second Intelligent distribution transformer 2.
As shown in Figure 2, high-pressure side A, B, C tri-of A, B, C three-phase respectively with the first Intelligent distribution transformer 1 of intelligent electronic device 4 is connected; High-pressure side A, B, C tri-of A, B, C three-phase respectively with the second Intelligent distribution transformer 2 of intelligent electronic device 6 is connected; Low-pressure side a, b, c tri-of a, b, c three-phase respectively with the first Intelligent distribution transformer 1 of intelligent electronic device 4 are connected; Low-pressure side a, b, c tri-of a, b, c three-phase respectively with the second Intelligent distribution transformer 2 of intelligent electronic device 6 are connected.Powered to adjustable transformer 7 by 380V alternating voltage.
In load test process, adjustable transformer 7 supplies the first Intelligent distribution transformer 1 and the second Intelligent distribution transformer 2 low-pressure side voltage U
ab, U
bcand U
ac, the first Intelligent distribution transformer 1 and the second Intelligent distribution transformer 2 high-pressure side will induce high voltage:
Wherein, K is no-load voltage ratio coefficient.
The scope of each phase voltage of secondary side of adjustable transformer 7 is 0 ~ 400V, by regulating adjustable transformer 7, U
ab, U
bcand U
acraise gradually by zero, electric current will be had to pass through in the first Intelligent distribution transformer 1 and the second Intelligent distribution transformer 2, each phase current values I
ab, I
bcand I
acbe respectively:
In formula: Z
1be every phase of impedance of the first Intelligent distribution transformer 1, Z
2it is every phase of impedance of the second Intelligent distribution transformer 2.
The each phase voltage of secondary side of adjustment adjustable transformer 7, first Intelligent distribution transformer 1 and the second Intelligent distribution transformer 2 will be under duration of test will operate in different loads state, the electric current of its low-pressure side is by linear increase, state when this state meets load running, the load-carrying process of test product can be simulated, carry out load test.
The load loss of Intelligent distribution transformer calculates.
Wherein:
it is the low-pressure side A phase current of the first Intelligent distribution transformer 1 and the second Intelligent distribution transformer 2;
be the high-pressure side A phase voltage of the first Intelligent distribution transformer 1 and the second Intelligent distribution transformer 2,
be the low-pressure side A phase voltage of the first Intelligent distribution transformer 1 and the second Intelligent distribution transformer 2,
be the low-pressure side B phase current of the first Intelligent distribution transformer 1 and the second Intelligent distribution transformer 2,
be the high-pressure side B phase voltage of the first Intelligent distribution transformer 1 and the second Intelligent distribution transformer 2,
be the low-pressure side B phase voltage of the first Intelligent distribution transformer 1 and the second Intelligent distribution transformer 2,
be the low-pressure side C phase current of the first Intelligent distribution transformer 1 and the second Intelligent distribution transformer 2,
be the high-pressure side C phase voltage of the first Intelligent distribution transformer 1 and the second Intelligent distribution transformer 2,
it is the low-pressure side C phase voltage of the first Intelligent distribution transformer 1 and the second Intelligent distribution transformer 2.
Discretize just can calculate the load loss under present load later.
Conversion to the load loss at 75 DEG C is:
The short-circuit impedance of Intelligent distribution transformer calculates.
The formula of short-circuit impedance is calculated according to testing laboratory:
Wherein:
the short-circuit voltage (low-pressure side of the first Intelligent distribution transformer 1 and the second Intelligent distribution transformer 2 applies voltage) of surveying under Current Temperatures;
；
the rated capacity of transformer,
temperature conversion factor.
Claims (8)
1. an Intelligent distribution transformer load testing apparatus, comprise the first Intelligent distribution transformer, second Intelligent distribution transformer and adjustable transformer, the high-pressure side A of the first Intelligent distribution transformer, B, the high-pressure side A of C three-phase and the second Intelligent distribution transformer, B, C tri-is connected, it is characterized in that: the low-pressure side a of the first described Intelligent distribution transformer, b, c three-phase, the low-pressure side a of the second Intelligent distribution transformer, b, c three-phase respectively with the high-pressure side A of adjustable transformer, B, C tri-is connected, at the first Intelligent distribution transformer and the second Intelligent distribution transformer low-pressure side a, b, a phase mutual inductor is connected in series between c, b phase mutual inductor and c phase mutual inductor.
2. Intelligent distribution transformer load testing apparatus as claimed in claim 1, is characterized in that: the voltage regulation limits of the secondary side of adjustable transformer is: 0-380V.
3. Intelligent distribution transformer load testing apparatus as claimed in claim 1, is characterized in that: the first Intelligent distribution transformer is identical with the nameplate parameter of the second Intelligent distribution transformer.
4. Intelligent distribution transformer load testing apparatus as claimed in claim 1, is characterized in that: the first Intelligent distribution transformer and the second Intelligent distribution transformer make their its loads each other mutually in fictitious load process, and load factor is on all four.
5. Intelligent distribution transformer load testing apparatus as claimed in claim 1, is characterized in that: the data that self IED of the first Intelligent distribution transformer and the second Intelligent distribution transformer measures are mutual inductor measurement data of a, b, c three-phase being connected on the first Intelligent distribution transformer and the second Intelligent distribution transformer low-pressure side is reference.
6. Intelligent distribution transformer load testing apparatus as claimed in claim 1, it is characterized in that: the first described Intelligent distribution transformer comprises the first intelligent electronic device and forms, second Intelligent distribution transformer comprises the second intelligent electronic device and forms, high-pressure side A, B, C tri-of A, B, C three-phase respectively with the first Intelligent distribution transformer of the first intelligent electronic device is connected, and low-pressure side a, b, c tri-of a, b, c three-phase respectively with the first Intelligent distribution transformer of the first intelligent electronic device are connected; High-pressure side A, B, C tri-of A, B, C three-phase respectively with the second Intelligent distribution transformer of the second intelligent electronic device is connected, and low-pressure side a, b, c tri-of a, b, c three-phase respectively with the second Intelligent distribution transformer of the second intelligent electronic device are connected.
7. an Intelligent distribution transformer load test method, is characterized in that: comprise following steps:
Step one: two Intelligent distribution transformer high-pressure sides A, B, C are connected, and the intelligent electronic device in each Intelligent distribution transformer connects with this Intelligent distribution transformer input-output line respectively;
Step 2: the low-pressure side a of the first Intelligent distribution transformer, b, c three-phase, the low-pressure side a of the second Intelligent distribution transformer, b, c three-phase are connected with high-pressure side A, B, C tri-of adjustable transformer, at the first Intelligent distribution transformer and the second Intelligent distribution transformer low-pressure side a, is connected in series a phase mutual inductor, b phase mutual inductor and c phase mutual inductor between b, c; High-pressure side A, B, C three-phase of the first Intelligent distribution transformer is connected with high-pressure side A, B, C tri-of the second Intelligent distribution transformer;
Step 3: each phase voltage of adjustment adjustable transformer secondary side, then two each phase currents of Intelligent distribution transformer can linear change.
8. Intelligent distribution transformer load test method as claimed in claim 7, is characterized in that: the nameplate parameter of two Intelligent distribution transformers of described step one is identical.
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| CN102096033A (en) * | 2010-11-27 | 2011-06-15 | 国网电力科学研究院 | Test device for sudden short circuit of voltage transformer |
| CN102735969A (en) * | 2012-06-13 | 2012-10-17 | 江苏省电力公司南京供电公司 | Power transformer winding fault simulation test method |
| CN102832025A (en) * | 2012-07-24 | 2012-12-19 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent power distribution transformer |
| CN203178376U (en) * | 2013-01-23 | 2013-09-04 | 广东电网公司江门供电局 | Intelligent distribution transformer load test apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005241297A (en) * | 2004-02-24 | 2005-09-08 | J-Power Systems Corp | Withstand voltage test method of power equipment |
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|---|---|---|---|---|
| CN102096033A (en) * | 2010-11-27 | 2011-06-15 | 国网电力科学研究院 | Test device for sudden short circuit of voltage transformer |
| CN102735969A (en) * | 2012-06-13 | 2012-10-17 | 江苏省电力公司南京供电公司 | Power transformer winding fault simulation test method |
| CN102832025A (en) * | 2012-07-24 | 2012-12-19 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent power distribution transformer |
| CN203178376U (en) * | 2013-01-23 | 2013-09-04 | 广东电网公司江门供电局 | Intelligent distribution transformer load test apparatus |
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Owner name: WUHAN NARI LIMITED LIABILITY COMPANY OF STATE GRID Effective date: 20150727 Owner name: JIANGMEN POWER SUPPLY BUREAU, GUANGDONG ELECTRIC N Free format text: FORMER OWNER: WUHAN NARI LIMITED LIABILITY COMPANY OF STATE GRID ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20150727 |
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Effective date of registration: 20150727 Address after: 529000 Jiangmen City, Guangdong Province Building No. two road, No. 152 Applicant after: Jiang Power Supply Bureau, Guangdong, Power Network Co. Applicant after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Address before: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Applicant before: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute |
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