CN207081804U - A kind of submarine cable high-voltage isulation performance test system - Google Patents
A kind of submarine cable high-voltage isulation performance test system Download PDFInfo
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- CN207081804U CN207081804U CN201720892121.0U CN201720892121U CN207081804U CN 207081804 U CN207081804 U CN 207081804U CN 201720892121 U CN201720892121 U CN 201720892121U CN 207081804 U CN207081804 U CN 207081804U
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Abstract
The utility model discloses a kind of submarine cable high-voltage isulation performance test system, the system includes device for generating voltage, and the voltage of output Pass Test requirement carries out insulating properties examination to submarine cable to submarine cable；Measurement apparatus, for measuring voltage, electric current and the partial discharge amount of submarine cable submarine cable during insulating properties examination examination is carried out；Oil chromatography on-line computing model, for measuring chromatographic data of the submarine cable in submarine cable itself insulating oil after completing insulating properties examination；Data analysis set-up, it is connected with measurement apparatus and oil chromatography on-line computing model, and the measurement data come is transmitted for receiving measurement apparatus and oil chromatography on-line computing model, and to judge whether submarine cable possesses charged condition.By the way that with the system the Insulation Problems that are likely to occur in submarine cable operation can be found in advance, the problem of the insulating properties deficiency for overcoming traditional insulaion resistance effectively to examine submarine cable because test voltage is low.
Description
Technical field
It the utility model is related to submarine cable detection technique, and in particular to a kind of submarine cable high-voltage isulation performance test system
System.
Background technology
China possesses more than 300 ten thousand square kilometres of marine site and more than 18000 kilometers of long coastline, coastal to be distributed with more than 6000
Island.At present, China increasingly payes attention to the development and utilization of marine resources, national defense construction, Islands Exploitation, marine wind electric field, sea
The utilization of foreign petroleum resources etc. are required to the support of electric power.Seabed power transmission cable engineering construction is to promote economic integration,
National energy strategical planning is adapted to, optimization energy source configuration, reduces the important component that environment influences.
Southern major network is that the first bar 500kV in China is extra large across Qiongzhou Strait 500kV sea electric power cables with Hainan Power Grid networking
Bottom cable.Cable uses self-tolerant oil charging cable, and it is structurally characterized in that is filled with inside cable insulation with the insulating oil of low viscosity, and
Certain pressure is supplied by oil-servicing facilities, to eliminate the possibility that insulating inner produces air gap.Exchange 500kV submarine cables input
, it is necessary to carry out insulating properties test before operation, traditional insulaion resistance can not effectively examine seabed electric because test voltage is low
The insulating properties of cable, when carrying out commissioning test using ac voltage withstanding mode, because the electric capacity of long range 500kV submarine cables is big,
The reactor that needs compensate when carrying out ac voltage withstanding is more, causes Field AC Withstand Voltage Test to be carried out difficult.
The content of the invention
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of submarine cable high-voltage isulation
Energy pilot system, to determine the high-voltage isulation performance of submarine cable.
To achieve the above object, the technical solution of the utility model is：
A kind of submarine cable high-voltage isulation performance test system, including
Device for generating voltage, it includes voltage source, transformer and rectifier boost device, wherein, the positive pole of the voltage source
It is connected respectively with the primary side both ends of transformer with negative pole, rectifier boost device is attempted by the both ends of Circuit Fault on Secondary Transformer, rectification
The output end and submarine cable of booster are electrically connected, to export the voltage of Pass Test requirement to submarine cable, to seabed electricity
Cable carries out insulating properties examination；
Measurement apparatus, it is connected with submarine cable, and insulating properties examination examination process is being carried out for measuring submarine cable
Voltage, electric current and the partial discharge amount of middle submarine cable；
Oil chromatography on-line computing model, it is connected with submarine cable, and insulating properties examination is completed for measuring submarine cable
Chromatographic data in submarine cable itself insulating oil afterwards；
The measurement apparatus include first resistor, second resistance, 3rd resistor, Voltage measure, current measurer and
Partial discharge measuring appliance；Wherein, the first resistor, second resistance and 3rd resistor are sequentially connected in series, the input of first resistor and
Submarine cable is connected, the output head grounding of 3rd resistor, and the voltage of submarine cable is dropped to the electricity of coincidence measurement requirement
Pressure；Voltage measure, current measurer and partial discharge measuring appliance are connected between second resistance and 3rd resistor respectively, to survey respectively
Measure voltage, electric current and the partial discharge amount of submarine cable submarine cable during insulating properties examination examination is carried out.
The rectifier boost device is in series by multiple rectification units, and the rectification unit is by two electric capacity and two rectifiers
The loop of composition is formed.
The chromatographic data includes methane, ethane, ethene, acetylene, hydrogen, carbon monoxide, carbon dioxide.
Compared with prior art, its advantage is the utility model：
By the way that submarine cable can be found in advance with submarine cable high-voltage isulation performance test system of the present utility model
The Insulation Problems being likely to occur in operation, traditional insulaion resistance is overcome effectively to examine seabed electric because test voltage is low
The problem of insulating properties deficiency of cable, it also can solve the problem that the big and live ac voltage withstanding dress of electric capacity of long range 500kV submarine cables
The problem of putting more, operational difficulties, to effectively examination 500kV submarine cable high-voltage isulation performances and reduce submarine cable field test
Difficulty has and the safe and stable operation of power system is had great significance.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model submarine cable high-voltage isulation performance test system；
Fig. 2 is the structural representation of device for generating voltage；
Fig. 3 is the structural representation of measurement apparatus；
Voltage change curve figure when Fig. 4 is submarine cable testing experiment；
In figure：1st, device for generating voltage；2nd, measurement apparatus；3rd, oil chromatography on-line computing model；4th, data analysis set-up；5th, it is extra large
Bottom cable；21st, Voltage measure；22nd, current measurer；23rd, partial discharge measuring appliance.
Embodiment
Content of the present utility model is described in further details with reference to the accompanying drawings and detailed description.
Embodiment 1
As shown in fig.1, the structural representation of the submarine cable high-voltage isulation performance test system provided by the present embodiment
Figure, the system includes device for generating voltage 1, specifically, as shown in Fig. 2 the device for generating voltage includes 380V DC voltage
Source, transformer and rectifier boost device, wherein, the positive pole and negative pole of the direct voltage source primary side both ends with transformer respectively
It is connected, rectifier boost device is attempted by the both ends of Circuit Fault on Secondary Transformer, that is to say, that the magnitude of voltage U1 of transformer output will be into
For the input voltage of rectifier boost device, and the rectifier boost device is in series by multiple rectification units, rectification unit series connection
Number can specifically be set according to the demand of boosting, and specific in the present embodiment, rectifier boost device is by 50 rectification lists
What member was in series, and rectification unit is then made up of 2 electric capacity C and 2 rectifier D loop formed, that is to say, that it is whole
Individual rectifier boost utensil has 100 electric capacity and 100 voltages, realizes the voltage U1 of transformer output being rectified into 100U1, so as to
Meet submarine cable output the test voltage of insulating properties test request, in the present embodiment, rectifier boost device will export
600kv voltage into submarine cable 5, in this way, can solve traditional insulaion resistance due to test voltage is low can not be effective
The problem of submarine cable insulating properties, is examined on ground.Meanwhile above-mentioned device for generating voltage can reach following performance indications：It is defeated
Enter power supply：AC380V ± 10%, 50Hz ± 1%；Output voltage pointing accuracy：<1 grade；Output current pointing accuracy：<1 grade；Line
Wave system number：≤ 0.5%；0.75 times of output voltage pointing accuracy：<1 grade, band latches.
Specifically, in the present embodiment, above-mentioned transformer using Henan Yu Bian electrician Co., Ltd S11-M-30/
10 model transformers, capacitor using Jinzhou Kaimei Energy Co., Ltd. SE-2R5 capacitors, rectifier using
CBRHDSH1-40L the or CBRHDSH2-40 type rectifiers of Central Semiconductor companies.
Return shown in Fig. 1, measurement apparatus 2 is also associated with submarine cable 5, the measurement apparatus 2 is used to measure seabed electricity
Voltage, electric current and the partial discharge amount of the submarine cable during insulating properties examination is carried out of cable 5.Oil is also associated with submarine cable
Chromatogram monitoring instrument 3, the oil chromatography on-line computing model 3 are oily using the ZF800-11 of Hennan Zhongfen apparatus Co., Ltd.
Chromatogram monitoring unit, for measuring submarine cable, (i.e. device for generating voltage is no longer to seabed after insulating properties examination is completed
Cable output voltage) chromatographic data in submarine cable 5 itself insulating oil, the chromatographic data includes methane, ethane, ethene, second
Alkynes, hydrogen, carbon monoxide, carbon dioxide.Finally to the electricity of the submarine cable during insulating properties examination is carried out of submarine cable 5
Pressure, electric current and partial discharge amount data and the chromatographic data completed after insulating properties is examined in itself insulating oil of submarine cable 5 are carried out
Comparative analysis, you can to detect whether submarine cable 5 possesses charged condition (specific detection method detailed in Example 2).
It follows that by can be found in advance with submarine cable high-voltage isulation performance test system of the present utility model
The Insulation Problems being likely to occur in submarine cable operation, overcome traditional insulaion resistance effectively to be examined because test voltage is low
The problem of insulating properties deficiency of core submarine cable, it also can solve the problem that the electric capacity scene friendship greatly of long range 500kV submarine cables
The problem of flowing more pressure-resistant apparatus, operational difficulties, to effectively examination 500kV submarine cable high-voltage isulation performances and reduce submarine cable
Field test difficulty has and the safe and stable operation of power system is had great significance.
Specifically, as shown in figure 3, above-mentioned measurement apparatus 2 includes first resistor R1, second resistance R2,3rd resistor R3,
Voltage measure 21, current measurer 22 and partial discharge measuring appliance 23；Wherein, the first resistor R1, second resistance 42 and
3rd electric R3 resistances are sequentially connected in series, and first resistor R1 input is connected with submarine cable 5,3rd resistor R3 output termination
Ground, Voltage measure 21, current measurer 22 and partial discharge measuring appliance 23 be connected to respectively second resistance 42 and 3rd resistor R3 it
Between, to measure voltage, electric current and the partial discharge of the submarine cable during insulating properties examination examination is carried out of submarine cable 5 respectively
Amount.In this way, after first resistor R1, second resistance R2 and 3rd resistor R3 decompression successively, 600kv voltage can be dropped to
Below 5v measurement range, Voltage measure 21, current measurer 22 and partial discharge measuring appliance 23, which can be measured accordingly, to go to sea
Bottom cable 5 is carrying out the change of voltage, electric current and partial discharge amount that insulating properties is tested during examining.In the present embodiment, on
The first resistor R1 and second resistance R2 stated is using the BZ9/1 high value standards electricity of Shanghai Cheng Yang instrument and meters Co., Ltd
Resistance type number, 3rd resistor R3 is using the BZ3 DC Standard Resistors of Shanghai Cheng Yang instrument and meters Co., Ltd, Voltage measure
21 using JOSEF companies JDZ1-1/JDZ2-1/JDZ3-1 voltage transformers, current measurer 22 is using JOSEF
The LYM-0.5 current transformers of company, partial discharge measuring appliance 23 is using Baoding Tianwei New Domain Technology Development Co., Ltd
The fault diagnosis and synthesis analyzer of TWPD-2F shelf depreciations.
Embodiment 2
A kind of method for determining submarine cable high-voltage isulation performance, methods described comprise the following steps：
S1, device for generating voltage apply 600kv positive polarity voltage according to the time of setting to submarine cable, to examine sea
The insulation resistance of bottom cable；Specifically, device for generating voltage of the device for generating voltage described in using embodiment 1, and
Using continuous pressure to pressure voltage (600kv), the regulation of pressure regulation initial period should relatively relax, in case submarine cable charging current causes
Equipment output current transfinites tripping operation, the interstage should very fast and average rate pressure regulation, when voltage exceedes the 75% of test voltage 600kv
When, pressure regulation speed is not lower than 600kv 2%/second, in order to avoid cause the pressure-resistant time mistake of submarine cable when close to test voltage
It is long.Specific experiment pressuring curve, should as shown in figure 4, t1 is the time used in voltage from zero to test voltage on submarine cable in figure
No more than 2 minutes, t2 was 1 hour of tested device pressure-resistant time in figure, i.e., 60 minutes.
S2, measurement apparatus measurement submarine cable submarine cable during insulating properties examination examination is carried out voltage, electric current
And partial discharge amount, specifically, the measurement apparatus is using the measurement apparatus described in embodiment 1.
S3, oil chromatography on-line computing model measurement the submarine cable chromatogram in submarine cable itself oil after completing insulating properties examination
Data, specifically, the oil chromatography on-line computing model is using the oil chromatography on-line computing model described in embodiment 1.
S4, submarine cable judged according to voltage, electric current, partial discharge amount and the chromatographic data measured by step S2 and S3
Whether possess charged condition, be specially：
After the magnitude of voltage of submarine cable reaches magnitude of voltage (i.e. the 600kv) for meeting test request, Voltage measure is surveyed
The magnitude of voltage excursion measured is ± 3%, and the time persistently retains 1 hour, and submarine cable is without generation disruptive discharge and outside
Portion's flashover；
After the magnitude of voltage of submarine cable reaches the magnitude of voltage for meeting test request, the electric current measured by current measurer
Value changes scope is ± 5%, and the time persistently retains 1 hour；
Submarine cable is being carried out last 10 minutes of insulating properties examination in, measured by partial discharge measuring appliance more than 2000PC
Discharge pulse number should be no more than 10；
After submarine cable completes insulating properties examination, methane, second in the chromatographic data measured by oil chromatography on-line computing model
Alkane, ethene, the summation of acetylene are less than 150uL/L, and acetylene is less than 0.1uL/L, hydrogen is less than 150uL/L；
If submarine cable all meets above-mentioned condition, then it represents that submarine cable possesses charged condition；Otherwise submarine cable is not
Specific charged condition.
It follows that asked by the insulation that be able to can find to be likely to occur in submarine cable operation in advance with this method
Topic, traditional insulaion resistance is overcome effectively to examine asking for the insulating properties deficiency of submarine cable because test voltage is low
Topic, also can solve the problem that the problem of big and live ac voltage withstanding device of electric capacity of long range 500kV submarine cables is more, operational difficulties,
Have and effectively examination 500kV submarine cable high-voltage isulation performances and reduction submarine cable field test difficulty to power system
Safe and stable operation have great significance.
For above-described embodiment simply to illustrate that technical concepts and features of the present utility model, the purpose is to be to allow this area
Interior those of ordinary skill can understand content of the present utility model and implement according to this, can not be limited with this of the present utility model
Protection domain.The equivalent change or modification that every essence according to the utility model content is made, should all cover in this reality
With in new protection domain.
Claims (4)
- A kind of 1. submarine cable high-voltage isulation performance test system, it is characterised in that includingDevice for generating voltage, it includes voltage source, transformer and rectifier boost device, wherein, the positive pole of the voltage source and negative Pole is connected with the primary side both ends of transformer respectively, and rectifier boost device is attempted by the both ends of Circuit Fault on Secondary Transformer, rectifier boost The output end and submarine cable of device are electrically connected, and to export the voltage of Pass Test requirement to submarine cable, submarine cable is entered Row insulating properties is examined；Measurement apparatus, it is connected with submarine cable, for measuring submarine cable sea during insulating properties examination examination is carried out Voltage, electric current and the partial discharge amount of bottom cable；Oil chromatography on-line computing model, it is connected with submarine cable, for measuring submarine cable sea after insulating properties examination is completed Chromatographic data in itself insulating oil of bottom cable.
- 2. submarine cable high-voltage isulation performance test system as claimed in claim 1, it is characterised in that the measurement apparatus bag Include first resistor, second resistance, 3rd resistor, Voltage measure, current measurer and partial discharge measuring appliance；Wherein, described One resistance, second resistance and 3rd resistor are sequentially connected in series, and the input of first resistor is connected with submarine cable, 3rd resistor Output head grounding, by the voltage of submarine cable drop to coincidence measurement requirement voltage；Voltage measure, current measurer And partial discharge measuring appliance is connected between second resistance and 3rd resistor respectively, examined with measuring submarine cable respectively in progress insulating properties Voltage, electric current and the partial discharge amount of submarine cable during core examination.
- 3. submarine cable high-voltage isulation performance test system as claimed in claim 1, it is characterised in that the rectifier boost device It is in series by multiple rectification units, the loop that the rectification unit is made up of two electric capacity and two rectifiers is formed.
- 4. submarine cable high-voltage isulation performance test system as claimed in claim 1, it is characterised in that the chromatographic data bag Include methane, ethane, ethene, acetylene, hydrogen, carbon monoxide, carbon dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720892121.0U CN207081804U (en) | 2017-07-21 | 2017-07-21 | A kind of submarine cable high-voltage isulation performance test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720892121.0U CN207081804U (en) | 2017-07-21 | 2017-07-21 | A kind of submarine cable high-voltage isulation performance test system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107329061A (en) * | 2017-07-21 | 2017-11-07 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of submarine cable high-voltage isulation performance test system and determination method |
| CN112269016A (en) * | 2020-10-12 | 2021-01-26 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Oil-filled cable internal insulation oil dissolved gas diffusion simulation experiment device |
-
2017
- 2017-07-21 CN CN201720892121.0U patent/CN207081804U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107329061A (en) * | 2017-07-21 | 2017-11-07 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of submarine cable high-voltage isulation performance test system and determination method |
| CN112269016A (en) * | 2020-10-12 | 2021-01-26 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Oil-filled cable internal insulation oil dissolved gas diffusion simulation experiment device |
| CN112269016B (en) * | 2020-10-12 | 2022-11-04 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Oil-filled cable internal insulation oil dissolved gas diffusion simulation experiment device |
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