CN203465380U - Preliminary identification test system used for evaluating long-term electrical performance of extruded insulated direct-current submarine cable system - Google Patents
Preliminary identification test system used for evaluating long-term electrical performance of extruded insulated direct-current submarine cable system Download PDFInfo
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- CN203465380U CN203465380U CN201320507395.5U CN201320507395U CN203465380U CN 203465380 U CN203465380 U CN 203465380U CN 201320507395 U CN201320507395 U CN 201320507395U CN 203465380 U CN203465380 U CN 203465380U
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Abstract
The utility model discloses a preliminary identification test system used for evaluating long-term electrical performance of an extruded insulated direct-current submarine cable system. The preliminary identification test system comprises a pool, a direct-buried area, an analog cable loop, a test cable loop, an analog cable temperature monitoring unit and a test cable temperature monitoring unit. A preliminary identification test system loop stipulates a test object, layout simulation of ocean and transition region installation and simulates cable arrangement, a temperature monitoring system, a thermal cycle voltage test system, a test system and the like. A cable and an accessory included in the extruded insulated direct-current submarine cable system during actual operation are simulated and a representative laying condition and an operation environment are used so as to form a test system loop and carry out a preliminary identification test. A purpose of evaluating long-term reliability of the extruded insulated direct-current submarine cable system is achieved. The system structure is simple and operation is convenient.
Description
Technical field
The utility model belongs to plastic extruding insulated direct current submarine cable system field of measuring technique, specifically refers to a kind of pre-design test system of assessing the long-term electric property of plastic extruding insulated direct current submarine cable system.
Background technology
The nineties in 20th century, some offshore companies have developed Technology of HVDC based Voltage Source Converter, adopt voltage source converter (VSC) based on turn-off device and PWM technology to replace current source converter (csc) based on circuit rectification commutation technique (LCC) and the direct current transportation pattern that combines of plastic extruding insulated direct current cables.The fields such as this HVDC Transmission Technology is applicable to being applied to that regenerative resource is grid-connected, distributed power generation is grid-connected very much, isolated island power supply, urban distribution network power supply and Asynchronous Communication Power System Interconnection.Along with the development of Technology of HVDC based Voltage Source Converter, increasing plastic extruding insulated direct current submarine cable system is applied to electric power transfer, and the long-term behaviour appraisal procedure of direct current submarine cable system is significant for reliability and the security of whole transmission system.
Cable system, before the supply of material, for proving that it has satisfied long-term behaviour, adopts pre-design test to assess cable system conventionally.For the concrete setting of plastic extruding insulated direct current submarine cable system, there is no at present unified national standard (GB) and IEC (IEC).The existing world large electric power network technique standard CIGRE496 < < Recommendations for Testing DC Extruded Cable Systems for Power Transmission at a Rated Voltage up to500kV > > and national electric wire quality supervision and test Center Technology standard TICW7.1 < < rated voltage 500kV and following direct current transportation are by cables with extruded insulation systems technology standard part 1 test method and require the same pre-evaluation assessment requirement that proposes plastic extruding insulated direct current cables system long-term behaviour in > >, the order of the pre-design test of two standards to test of long duration, confirming performance after test of long duration, test is interrupted and program and the criterion of test again provide clear and definite requirement, yet two sample loops that standard is all failed to the pre-design test of plastic extruding insulated direct current submarine cable system, subjects, the layout of test, the installation of zone of transition and the requirement of dummycable etc. provide clear and definite regulation, do not provide concrete pre-design test system architecture and evaluation steps thereof, the great difficulty of bringing to actual operation, therefore designing plastic extruding insulated direct current submarine cable system pre-design test system test loop and method of testing thereof has very important significance to quality and the engineering application of assessment plastic extruding insulated direct current subsea cable product.
Utility model content
The purpose of this utility model is to provide a kind of pre-design test system of assessing the long-term electric property of plastic extruding insulated direct current submarine cable system, and this system architecture is simple, easy to operate.
Above-mentioned purpose of the present utility model realizes by following technical solution: a kind of pre-design test system of assessing the long-term electric property of plastic extruding insulated direct current submarine cable system, is characterized in that: described pre-design test system comprises pond, direct-burried district, dummycable loop, test cable loop, dummycable temperature monitoring unit and test cable temperature monitoring unit;
The Di Wei slope, pond in described pond, water outlet edge, pond is discharge bay district, shoal, shoal is stacked with sand hill in discharge bay district;
Described test cable loop comprises direct current subsea cable, the connecting hose of direct current subsea cable, direct current overland cable, sea land joint and direct current cables terminal, described direct current Submarine Cable Laying is in described pond, simulate the extra large cable section of logging in, direct current subsea cable is in landing place anchoring, and tamp with sand hill in discharge bay district in shoal, after entering described direct-burried district after one end of direct current subsea cable logs in, connect described direct current cables terminal, after logging in, the other end is connected with described direct current overland cable by described extra large land joint, described direct current overland cable is laid in air, connect subsequently described direct current cables terminal,
Described dummycable loop comprises direct current subsea cable and the direct current overland cable being connected, direct current Submarine Cable Laying is in described pond, direct current subsea cable is in landing place anchoring, and tamp with sand hill in discharge bay district in shoal, after logging in, one end of direct current subsea cable enters the one end that connects direct current overland cable behind described direct-burried district, the other end of direct current subsea cable logs in the other end of rear connection direct current overland cable, direct current overland cable is laid in air, the direct current subsea cable in dummycable loop is identical with the direct current subsea cable structure in test cable loop, the direct current overland cable in dummycable loop is identical with the direct current overland cable structure in test cable loop,
Described dummycable temperature monitoring unit comprise the direct current subsea cable in dummycable loop and direct current overland cable respectively in corresponding pond, a plurality of thermopairs of arranging of discharge bay district, shoal, direct-burried district and the exposed aerial land of direct current overland cable cable section, a plurality of thermopairs are respectively used to the temperature of monitoring cable conductor and the temperature of cable cover(ing);
Described test cable temperature monitoring unit comprise the direct current subsea cable in test cable loop and direct current overland cable respectively in corresponding pond, a plurality of thermopairs of arranging of discharge bay district, shoal, direct-burried district and the exposed aerial land of direct current overland cable cable section, a plurality of thermopairs are respectively used to the temperature of monitoring cable sheath.
Pre-design test system circuit of the present utility model has stipulated that the layout simulation of subjects, ocean and the installation of zone of transition are, the layout of dummycable, temperature monitoring system, thermal cycle voltage test system and test macro etc.The cable comprising during the actual motion of simulation plastic extruding insulated direct current submarine cable system and annex, representative laid condition and the running environment of employing, form pilot system loop and carry out pre-design test, reach the object of assessment plastic extruding insulated direct current submarine cable system long-term reliability.
1) subjects
The subjects of direct current submarine cable system should comprise direct current subsea cable (the about 100m of length), at least one direct current subsea cable soft joint, at least one direct current subsea cable and overland cable crossover sub, direct current overland cable and two direct current subsea cable terminals.
2) installation of the simulation of the layout of ocean and zone of transition
Direct current submarine cable system is generally applied to pass through the cable trace in ocean or lake, and what the layout of test loop need to be considered cable immersion condition and the section of logging in zone of transition lays simulation and the installation that logs in rear terminal.
3) layout of dummycable
Dummycable should be with test cable system layout in identical laid condition, and the electric current that inside applies should be in full accord with test cable system.
4) temperature test unit
On dummycable loop and test cable loop, the thermopair of some, the temperature of test cable conductor, insulation and sheath and surrounding environment are arranged in interval.
5) thermal cycle voltage-drop loading unit
Adopt conductor current type of heating to make the conductor temperature of direct current subsea cable reach set point of temperature, guarantee that the temperature of conductor reaches the temperature range of regulation, and make in test loop electric current and dummycable loop in full accord, and monitor two return cable oversheath temperature.
6) voltage-drop loading unit: apply the voltage of pre-design test regulation on pilot system loop, and carry out the monitoring of voltage.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the block diagram of the pre-design test system of the utility model.
Description of reference numerals
101, pond; 102, direct-burried district; 1, direct current subsea cable; 2, direct current overland cable;
3, connecting hose; 4, direct current cables terminal; 5, extra large land joint; 6, transformer;
7, current transformer; 8, test connects; 9, thermopair; 10, thermopair; 11, sand hill;
Embodiment
A kind of pre-design test system of assessing the long-term electric property of plastic extruding insulated direct current submarine cable system as shown in Figure 1, comprises 101, direct-burried district, pond 102, dummycable loop, test cable loop, dummycable temperature monitoring unit and test cable temperature monitoring unit;
3 meters of the pond 101 bosom depth of waters, the Di Wei slope, pond in pond 101,101 water outlet edges, pond are discharge bay district, shoal, shoal is stacked with sand hill 11 in discharge bay district;
Test cable loop comprises direct current subsea cable 1, the connecting hose 3 of direct current subsea cable, direct current overland cable 2, sea land joint 5 and direct current cables terminal 4, the about 100m of direct current subsea cable 1 length, be laid in pond 101, simulate the extra large cable section of logging in, direct current subsea cable 1 is in landing place anchoring, and tamp with sand hill 11 in discharge bay district in shoal, after logging in, one end of direct current subsea cable 1 enters direct-burried district 102 rear connection direct current cables terminal 4, after logging in, the other end is connected with direct current overland cable 2 by extra large land joint 5, direct current overland cable 2 is laid in air, connect subsequently direct current cables terminal 4,
Dummycable loop comprises direct current subsea cable 1 and the direct current overland cable 2 being connected, direct current subsea cable 1 is laid in pond 101, direct current subsea cable 1 is in landing place anchoring, and tamp with sand hill 11 in discharge bay district in shoal, after logging in, one end of direct current subsea cable 1 enters one end of direct-burried district 102 rear connection direct current overland cable 2, the other end of direct current subsea cable 1 logs in the other end of rear connection direct current overland cable 2, direct current overland cable 2 is laid in air, the direct current subsea cable 1 in dummycable loop is identical with direct current subsea cable 1 structure in test cable loop, the direct current overland cable 2 in dummycable loop is identical with direct current overland cable 2 structures in test cable loop,
Dummycable temperature monitoring unit comprise the direct current subsea cable 1 in dummycable loop and direct current overland cable 2 respectively in corresponding discharge bay district, 101, shoal, pond, a plurality of thermopairs of arranging of direct-burried district 102 and the exposed aerial land of direct current overland cable 2 cable section, in a plurality of thermopairs, part thermopair 10 is for the temperature of monitoring cable conductor, and another part thermopair 9 is for the temperature of monitoring cable sheath;
Test cable temperature monitoring unit comprise the direct current subsea cable 1 in test cable loop and direct current overland cable 2 respectively in corresponding discharge bay district, 101, shoal, pond, a plurality of thermopairs of arranging of direct-burried district 102 and the exposed aerial land of direct current overland cable 2 cable section, a plurality of thermopairs 9 are respectively used to the temperature of monitoring cable sheath.
The pre-design test system of the present embodiment also needs at the trial to dummycable loop loading current, to test cable loop on-load voltage, wherein, the mode of dummycable loop loading current is: adopt conductor current type of heating, cable to dummycable loop applies induction current, the temperature of monitoring cable conductor, makes the temperature of cable conductor in the temperature range of regulation simultaneously; The mode of test cable loop on-load voltage is: on test cable loop, apply pre-design test voltage, and carry out the monitoring of voltage, under this pre-design test voltage-drop loading, cable conductor electric current in warranty test cable loop is identical with the cable conductor electric current in dummycable loop, monitors the temperature of cable cover(ing) in two loops simultaneously.
Wherein, the testing current unit of loading: the conductor at analog loopback applies induction current, guarantees that the temperature of conductor reaches the temperature range of regulation, and makes in test loop electric current and dummycable loop in full accord, and monitors two return cable oversheath temperature.
The voltage tester unit loading: apply the voltage of pre-design test regulation on pilot system loop, and carry out the monitoring of voltage.
The utility model discloses the assessment method of the pre-design test system that adopts the long-term electric property of above-mentioned assessment plastic extruding insulated direct current submarine cable system simultaneously, and the method comprises the steps:
(1) arrange pre-design test system;
(2) adopt conductor current type of heating, the cable in dummycable loop is applied to induction current, the temperature of monitoring cable conductor, makes the temperature of cable conductor in the temperature range of regulation simultaneously;
(3) on test cable loop, apply pre-design test voltage, and carry out the monitoring of voltage, under this pre-design test voltage-drop loading, cable conductor electric current in warranty test cable loop is identical with the cable conductor electric current in dummycable loop, monitors the temperature of cable cover(ing) in two loops simultaneously;
(4) whether whether the direct current subsea cable in monitoring test cable loop is electrically shocked and wears within the regular hour, according to monitoring result, the electric property of direct current subsea cable is assessed, safe and reliable to determine direct current subsea cable;
Wherein, the temperature range in step 2, the pre-design test voltage in step 3 and the regular hour in step 4 are all to carry out relevant national standard or IEC, the pre-design test voltage in step 3 is high-voltage dc transmission piezoelectric voltage.
Above-described embodiment of the present utility model is not the restriction to the utility model protection domain; embodiment of the present utility model is not limited to this; all this kind is according to foregoing of the present utility model; according to ordinary skill knowledge and the customary means of this area; do not departing under the above-mentioned basic fundamental thought of the utility model prerequisite; the modification of other various ways that the utility model said structure is made, replacement or change, within all should dropping on protection domain of the present utility model.
Claims (1)
1. a pre-design test system of assessing the long-term electric property of plastic extruding insulated direct current submarine cable system, is characterized in that: described pre-design test system comprises pond (101), direct-burried district (102), dummycable loop, test cable loop, dummycable temperature monitoring unit and test cable temperature monitoring unit;
The Di Wei slope, pond in described pond (101), water outlet edge, pond (101) is discharge bay district, shoal, is stacked with sand hill (11) in discharge bay district, shoal;
Described test cable loop comprises direct current subsea cable (1), the connecting hose of direct current subsea cable (3), direct current overland cable (2), sea land joint (5) and direct current cables terminal (4), described direct current subsea cable (1) is laid in described pond (101), simulate the extra large cable section of logging in, direct current subsea cable (1) is in landing place anchoring, and shoal discharge bay for district sand hill (11) tamp, after entering described direct-burried district (102) after one end of direct current subsea cable (1) logs in, connect described direct current cables terminal (4), after logging in, the other end is connected with described direct current overland cable (2) by described extra large land joint (5), described direct current overland cable (2) is laid in air, connect subsequently described direct current cables terminal (4),
Described dummycable loop comprises direct current subsea cable (1) and the direct current overland cable (2) being connected, direct current subsea cable (1) is laid in described pond (101), direct current subsea cable (1) is in landing place anchoring, and shoal discharge bay for district sand hill (11) tamp, after logging in, one end of direct current subsea cable (1) enters rear one end that connects direct current overland cable (2), described direct-burried district (102), the other end of direct current subsea cable (1) logs in the other end of rear connection direct current overland cable (2), direct current overland cable (2) is laid in air, the direct current subsea cable (1) in dummycable loop is identical with direct current subsea cable (1) structure in test cable loop, the direct current overland cable (2) in dummycable loop is identical with direct current overland cable (2) structure in test cable loop,
Described dummycable temperature monitoring unit comprise the direct current subsea cable (1) in dummycable loop and direct current overland cable (2) respectively in corresponding pond (101), discharge bay district, shoal, a plurality of thermopairs of arranging of direct-burried district (102) and the exposed aerial land of direct current overland cable (2) cable section, a plurality of thermopairs are respectively used to the temperature of monitoring cable conductor and the temperature of cable cover(ing);
Described test cable temperature monitoring unit comprise the direct current subsea cable (1) in test cable loop and direct current overland cable (2) respectively in corresponding pond (101), discharge bay district, shoal, a plurality of thermopairs of arranging of direct-burried district (102) and the exposed aerial land of direct current overland cable (2) cable section, a plurality of thermopairs are respectively used to the temperature of monitoring cable sheath.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320507395.5U CN203465380U (en) | 2013-08-19 | 2013-08-19 | Preliminary identification test system used for evaluating long-term electrical performance of extruded insulated direct-current submarine cable system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320507395.5U CN203465380U (en) | 2013-08-19 | 2013-08-19 | Preliminary identification test system used for evaluating long-term electrical performance of extruded insulated direct-current submarine cable system |
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| CN203465380U true CN203465380U (en) | 2014-03-05 |
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| CN201320507395.5U Withdrawn - After Issue CN203465380U (en) | 2013-08-19 | 2013-08-19 | Preliminary identification test system used for evaluating long-term electrical performance of extruded insulated direct-current submarine cable system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472369A (en) * | 2013-08-19 | 2013-12-25 | 广东电网公司电力科学研究院 | Prequalification test system and evaluating method for evaluating long-term electric property of direct-current extruded dielectric submarine cable system |
| CN104297646A (en) * | 2014-10-14 | 2015-01-21 | 中国南方电网有限责任公司电网技术研究中心 | Load cycle test insulating temperature gradient control method and system for high-voltage direct-current cables |
| CN108695810A (en) * | 2018-04-28 | 2018-10-23 | 中国电力科学研究院有限公司 | The system and method for submarine cable system pre-qualification test briny environment simulation |
| WO2020238069A1 (en) * | 2019-05-31 | 2020-12-03 | 国网浙江省电力有限公司舟山供电公司 | Testing platform employing forced water-circulation cooling for testing dc power cable under dc heat source under multiple-operating conditions |
-
2013
- 2013-08-19 CN CN201320507395.5U patent/CN203465380U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472369A (en) * | 2013-08-19 | 2013-12-25 | 广东电网公司电力科学研究院 | Prequalification test system and evaluating method for evaluating long-term electric property of direct-current extruded dielectric submarine cable system |
| CN103472369B (en) * | 2013-08-19 | 2015-06-10 | 广东电网公司电力科学研究院 | Prequalification test system and evaluating method for evaluating long-term electric property of direct-current extruded dielectric submarine cable system |
| CN104297646A (en) * | 2014-10-14 | 2015-01-21 | 中国南方电网有限责任公司电网技术研究中心 | Load cycle test insulating temperature gradient control method and system for high-voltage direct-current cables |
| CN104297646B (en) * | 2014-10-14 | 2017-02-15 | 中国南方电网有限责任公司电网技术研究中心 | Load cycle test insulating temperature gradient control method and system for high-voltage direct-current cables |
| CN108695810A (en) * | 2018-04-28 | 2018-10-23 | 中国电力科学研究院有限公司 | The system and method for submarine cable system pre-qualification test briny environment simulation |
| WO2020238069A1 (en) * | 2019-05-31 | 2020-12-03 | 国网浙江省电力有限公司舟山供电公司 | Testing platform employing forced water-circulation cooling for testing dc power cable under dc heat source under multiple-operating conditions |
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