CN103472369A - Prequalification test system and evaluating method for evaluating long-term electric property of direct-current extruded dielectric submarine cable system - Google Patents
Prequalification test system and evaluating method for evaluating long-term electric property of direct-current extruded dielectric submarine cable system Download PDFInfo
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- CN103472369A CN103472369A CN2013103627994A CN201310362799A CN103472369A CN 103472369 A CN103472369 A CN 103472369A CN 2013103627994 A CN2013103627994 A CN 2013103627994A CN 201310362799 A CN201310362799 A CN 201310362799A CN 103472369 A CN103472369 A CN 103472369A
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Abstract
The invention discloses a prequalification test system and evaluating method for evaluating the long-term electric property of a direct-current extruded dielectric submarine cable system. The previous identification test system comprises a water pool, a direct burial area, an analog cable circuit, a test cable circuit, an analog cable temperature monitoring unit and a test cable temperature monitoring unit; the circuit of the prequalification test system specifies a test object, an ocean arrangement simulation, the installation of a transition area, the arrangement of an analog cable, a temperature monitoring system, a heat circulation voltage test system, a test system, and the like. According to the invention, the test system loop is formed from a cable and an accessory which are included when the actual operation of the direct-current extruded dielectric submarine cable system is simulated by adopting representative laying condition and operating environment to carry out a prequalification test, so that the purpose of evaluating the long-term reliability of the direct-current extruded dielectric submarine cable system is achieved. The invention also discloses the evaluating method which adopts the prequalification test system for evaluating the long-term electric property of the direct-current extruded dielectric submarine cable system.
Description
Technical field
The invention belongs to plastic extruding insulated direct current submarine cable system field of measuring technique, specifically refer to a kind of pre-design test system and assessment method thereof 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, has satisfied long-term behaviour for proving it, usually adopts pre-design test to be assessed cable system.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 same pre-evaluation assessment requirement that proposes plastic extruding insulated direct current cables system long-term behaviour in 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 " cables with extruded insulation systems technology standard part 1 test method and requirement for rated voltage 500kV and following direct current transportation ", 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 standards are all failed to the sample loop of 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 assessing plastic extruding insulated direct current subsea cable product.
Summary of the invention
One of purpose of the present invention 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 invention 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 the discharge bay district;
Described test cable loop comprises the direct current subsea cable, the connecting hose of direct current subsea cable, the 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, the direct current subsea cable is in the landing place anchoring, and tamp with sand hill in the discharge bay district in shoal, connect described direct current cables terminal after entering described direct-burried district after one end of direct current subsea cable logs in, 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 be connected, the direct current Submarine Cable Laying is in described pond, the direct current subsea cable is in the landing place anchoring, and tamp with sand hill in the discharge bay district in shoal, after logging in, one end of direct current subsea cable enters an end that connects the 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, the 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 invention has been stipulated subjects, the layout simulation of ocean and the installation of zone of transition, layout, temperature monitoring system, thermal cycle voltage test system and the test macro etc. of dummycable.The cable comprised 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 the pilot system loop and carry out pre-design test, reach the purpose 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
The direct current submarine cable system generally is 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 the test cable system layout in identical laid condition, and the electric current that inside applies should be in full accord with the 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 the 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 the pilot system loop, and carry out the monitoring of voltage.
Two of purpose of the present invention is to provide a kind of assessment method that adopts the pre-design test system of the long-term electric property of above-mentioned assessment plastic extruding insulated direct current submarine cable system,
Above-mentioned purpose of the present invention realizes by following technical solution: adopt the assessment method of the pre-design test system of the long-term electric property of above-mentioned assessment plastic extruding insulated direct current submarine cable system, the method comprises the steps:
(1) arrange described pre-design test system;
(2) adopt the conductor current type of heating, the cable in dummycable loop is applied to induction current, the temperature of monitoring cable conductor, make the temperature of cable conductor in the temperature range of regulation simultaneously;
(3) apply pre-design test voltage on the test cable loop, and carry out the monitoring of voltage, under this pre-design test voltage-drop loading, cable conductor electric current in the warranty test cable loop is identical with the cable conductor electric current in the dummycable loop, monitors the temperature of cable cover(ing) in two loops simultaneously;
(4) whether whether the direct current subsea cable in the 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 the direct current subsea cable;
Temperature range in described step, the pre-design test voltage in step and the regular hour in step are all to carry out relevant national standard or IEC.
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The block diagram that Fig. 1 is the pre-design test system of the present invention.
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, comprise pond 101, direct-burried district 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, Di Wei slope, 101 pond, pond, 101 water outlet edges, pond are discharge bay district, shoal, shoal is stacked with sand hill 11 in the discharge bay district;
The 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 the landing place anchoring, and tamp with sand hill 11 in the 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,
The dummycable loop comprises direct current subsea cable 1 and the direct current overland cable 2 be connected, direct current subsea cable 1 is laid in pond 101, direct current subsea cable 1 is in the landing place anchoring, and tamp with sand hill 11 in the discharge bay district in shoal, after logging in, one end of direct current subsea cable 1 enters an 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 the conductor current type of heating, cable to the dummycable loop applies induction current, the temperature of monitoring cable conductor, make the temperature of cable conductor in the temperature range of regulation simultaneously; The mode of test cable loop on-load voltage is: apply pre-design test voltage on the test cable loop, and carry out the monitoring of voltage, under this pre-design test voltage-drop loading, cable conductor electric current in the warranty test cable loop is identical with the cable conductor electric current in the 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 loaded: apply the voltage of pre-design test regulation on the pilot system loop, and carry out the monitoring of voltage.
The present invention 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, the method comprises the steps:
(1) arrange pre-design test system;
(2) adopt the conductor current type of heating, the cable in dummycable loop is applied to induction current, the temperature of monitoring cable conductor, make the temperature of cable conductor in the temperature range of regulation simultaneously;
(3) apply pre-design test voltage on the test cable loop, and carry out the monitoring of voltage, under this pre-design test voltage-drop loading, cable conductor electric current in the warranty test cable loop is identical with the cable conductor electric current in the dummycable loop, monitors the temperature of cable cover(ing) in two loops simultaneously;
(4) whether whether the direct current subsea cable in the 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 the 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 the high-voltage dc transmission piezoelectric voltage.
The above embodiment of the present invention is not limiting the scope of the present invention; embodiments of the present invention are not limited to this; all this kind is according to foregoing of the present invention; ordinary skill knowledge and customary means according to this area; do not breaking away under the above-mentioned basic fundamental thought of the present invention prerequisite; the modification of other various ways that said structure of the present invention is made, replacement or change, within all should dropping on protection scope of the present invention.
Claims (2)
1. a pre-design test system of assessing the long-term electric property of plastic extruding insulated direct current submarine cable system, it 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 the landing place anchoring, and the shoal discharge bay for district sand hill (11) tamp, connect described direct current cables terminal (4) after entering described direct-burried district (102) after one end of direct current subsea cable (1) logs in, 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) be connected, direct current subsea cable (1) is laid in described pond (101), direct current subsea cable (1) is in the landing place anchoring, and the shoal discharge bay for district sand hill (11) tamp, after logging in, one end of direct current subsea cable (1) enters the rear end that connects direct current overland cable (2) in 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.
2. adopt the assessment method of the pre-design test system of the long-term electric property of assessment plastic extruding insulated direct current submarine cable system claimed in claim 1, the method comprises the steps:
(1) arrange described pre-design test system;
(2) adopt the conductor current type of heating, the cable in dummycable loop is applied to induction current, the temperature of monitoring cable conductor, make the temperature of cable conductor in the temperature range of regulation simultaneously;
(3) apply pre-design test voltage on the test cable loop, and carry out the monitoring of voltage, under this pre-design test voltage-drop loading, cable conductor electric current in the warranty test cable loop is identical with the cable conductor electric current in the dummycable loop, monitors the temperature of cable cover(ing) in two loops simultaneously;
(4) whether whether the direct current subsea cable in the 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 the direct current subsea cable;
Temperature range in described 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.
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| 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 |
| CN106525312A (en) * | 2016-10-25 | 2017-03-22 | 国网浙江省电力公司舟山供电公司 | Submarine cable anchor hanging test system and usage method thereof |
| CN107192918A (en) * | 2017-05-29 | 2017-09-22 | 西南交通大学 | Vehicle-mounted cable termination leakage current testing System and method at a temperature of particular surroundings |
| CN107356824A (en) * | 2017-07-21 | 2017-11-17 | 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 DC break down voltage test charge cumulative measurement system and measuring method |
| CN108594084A (en) * | 2018-02-26 | 2018-09-28 | 中国电力科学研究院有限公司 | A kind of method and system of the circuit of arrangement submarine cable system progress pre-qualification test |
| CN110208618A (en) * | 2019-05-31 | 2019-09-06 | 国网浙江省电力有限公司 | Multi-state direct current cables water compulsory circulative cooling test platform under direct current heat source |
| WO2022062512A1 (en) * | 2020-09-23 | 2022-03-31 | 万达集团股份有限公司 | Multiplet cable storage system |
| CN116087082A (en) * | 2023-02-10 | 2023-05-09 | 广东电网有限责任公司 | Marine environment resistance test device and test method for submarine cable material |
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| 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 |
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| CN106525312A (en) * | 2016-10-25 | 2017-03-22 | 国网浙江省电力公司舟山供电公司 | Submarine cable anchor hanging test system and usage method thereof |
| CN106525312B (en) * | 2016-10-25 | 2022-06-17 | 国网浙江省电力公司舟山供电公司 | Submarine cable anchoring and hanging test system and use method thereof |
| CN107192918B (en) * | 2017-05-29 | 2019-07-12 | 西南交通大学 | Leakage current testing System and method for of vehicle-mounted cable termination at a temperature of particular surroundings |
| CN107192918A (en) * | 2017-05-29 | 2017-09-22 | 西南交通大学 | Vehicle-mounted cable termination leakage current testing System and method at a temperature of particular surroundings |
| CN107356824A (en) * | 2017-07-21 | 2017-11-17 | 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 DC break down voltage test charge cumulative measurement system and measuring method |
| CN107356824B (en) * | 2017-07-21 | 2023-05-16 | 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 | Submarine cable direct-current withstand voltage test charge accumulation measurement system and measurement method |
| CN108594084A (en) * | 2018-02-26 | 2018-09-28 | 中国电力科学研究院有限公司 | A kind of method and system of the circuit of arrangement submarine cable system progress pre-qualification test |
| CN110208618A (en) * | 2019-05-31 | 2019-09-06 | 国网浙江省电力有限公司 | Multi-state direct current cables water compulsory circulative cooling test platform under direct current heat source |
| CN110208618B (en) * | 2019-05-31 | 2020-07-31 | 国网浙江省电力有限公司 | Multi-working-condition direct-current cable water circulation forced cooling test platform under direct-current heat source |
| WO2022062512A1 (en) * | 2020-09-23 | 2022-03-31 | 万达集团股份有限公司 | Multiplet cable storage system |
| CN116087082A (en) * | 2023-02-10 | 2023-05-09 | 广东电网有限责任公司 | Marine environment resistance test device and test method for submarine cable material |
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