CN109725255A - A kind of wind power generating set sea low voltage crossing detection method - Google Patents
A kind of wind power generating set sea low voltage crossing detection method Download PDFInfo
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- CN109725255A CN109725255A CN201811568445.4A CN201811568445A CN109725255A CN 109725255 A CN109725255 A CN 109725255A CN 201811568445 A CN201811568445 A CN 201811568445A CN 109725255 A CN109725255 A CN 109725255A
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- tension cable
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- voltage crossing
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Abstract
The invention discloses a kind of wind power generating set sea low voltage crossing detection methods, low voltage crossing test equipment is lifted on ship, and ship is reached tested blower and is nearby fixed on the positioning, low voltage crossing test equipment is concatenated into original sea cable route again, and temporarily increase the wiring of 35KV high-tension cable, and the high-tension cable connection type of offshore wind farm is using the form of " hand in hand " looped network, and the blower on same circuit has on-load switch in previous unit, the division of remote controlled on-load switch, outlet voltage by changing low voltage crossing test equipment tests tested blower, other blowers of same route are not influenced when test, it can be run with normal power generation.The present invention can reduce the influence to entire wind power plant, and when test avoids all shutting down the blower of same sea cable route, and the loss of wind field generated energy is effectively reduced.
Description
Technical field
The present invention relates to the technical fields of wind-power electricity generation, refer in particular to a kind of inspection of wind power generating set sea low voltage crossing
Survey method.
Background technique
Low voltage crossing, that is, Low voltage ride through, low voltage ride-through capability can guarantee Wind turbines in electricity
In the case that net failure, voltage reduce, as much as possible it is connect with power grid.Reactive power is provided to power grid simultaneously, until power grid
Restore normal, thus " passing through " this low-voltage time or low-voltage region.Blower with low voltage ride-through capability may pass through
Operating time of protection restores to operate normally after failure removal, can greatly reduce electricity generation system grid-connected number repeatedly in failure,
Reduce the impact to power grid.
Most of country all requires low voltage ride-through function, and the low electricity of each country to blower in the world at present
It presses to wear more standard to be not quite similar, Chinese low voltage cross-over of wind generator set standard requirements are shown in Fig. 1.
A) when wind farm grid-connected voltage falls to 20% nominal voltage, the blower in wind power plant should ensure that off-grid is not transported continuously
Row 625ms.
B) wind farm grid-connected voltage is when that can be restored to the 90% of nominal voltage in 2s after falling, in wind power plant
Blower should ensure that not off-grid continuous operation.
C) test point is chosen 90%, 75%, 50%, 35%, 20% 5 different Voltage Drops point respectively and is tested.
Be divided into three-phase fall with two-phase drop test, power respectively in 10%Pn-30%Pn, in 90%Pn both the above power bracket into
Row test.
1 wind power plant low voltage crossing of table examines voltage
| Fault type | Examine voltage |
| Three phase short circuit fault | Wind farm grid-connected line voltage |
| Two short troubles | Wind farm grid-connected line voltage |
Wind power generating set, which carries out low voltage crossing test in land, mature scheme, by becoming in air box
High-pressure side is concatenated into low voltage crossing test equipment, using impedance voltage divider principle, by low voltage crossing test equipment concatenate into
In 35KV circuit, low to wear test philosophy as shown in Figure 2.
Since wind power generating set gradually develops to sea, inevitably need to carry out offshore wind turbine low
Voltage ride-through test.Current offshore wind turbine due to marine complex environment condition and operating condition or is by wind-force
Generating set is mounted on land and is tested or be that low voltage crossing test equipment is placed on by the booster stations of land
Side is concatenated into whole sea cable route, as shown in Figure 3.
Low voltage crossing test equipment is accessed into sea cable route 1 in a manner of Fig. 3, the Fans on this route are carried out
It is low to wear test, need to cut off other 3 Fans.Currently, the general capacity of offshore wind turbine is all larger, and low voltage crossing test needs
It is tested under suitable strong wind operating condition and small wind operating condition, test period is longer, and a test item is from beginning preparing survey
Examination terminates to generally require 1-3 months.The low voltage crossing test item of one routine, using the testing scheme of Fig. 3, by low-voltage
Pass through test equipment and be placed on land, can caused by generated energy loss be expected to more than electric at 2,000,000 degree.Meanwhile booster stations
Space is limited, and concatenating into 35KV high-tension cable and low voltage crossing test equipment is also a difficult point, needs to increase 35KV switching
The equipment such as cabinet increase cost.
Summary of the invention
The present invention is directed to the status of current offshore wind turbine low voltage crossing test, and low voltage crossing test is set
Standby to be placed on land booster stations, other blowers of same route need to shut down where tested blower when carrying out test, right
The generated energy loss of entire wind power plant is affected, and it is tired to exist simultaneously coordination grid power blackout and the corresponding wiring unit of increase etc.
Difficulty proposes a kind of safe and reliable wind power generating set sea low voltage crossing detection method, low voltage crossing can be surveyed
It tries the influence to wind power plant and is reduced to minimum, generated energy loss is also dropped minimum.
To achieve the above object, technical solution provided by the present invention are as follows: a kind of wind power generating set sea low-voltage is worn
More detection method, this method be low voltage crossing test equipment is lifted on ship, and ship reach near tested blower into
Row positioning is fixed, then low voltage crossing test equipment is concatenated into original sea cable route, and temporarily increases 35KV high-tension cable
Wiring, and the high-tension cable connection type of offshore wind farm uses the form of " hand in hand " looped network, and the blower on same circuit
There is on-load switch in previous unit, can remotely control the division of on-load switch, is set by changing low voltage crossing test
Standby outlet voltage tests tested blower, and does not influence in test on other blowers of same route,
They can normal power generation operation.
Further, in order to set up 35KV high-tension cable safely, while avoiding wave, sea wind, ebb of rising to high-tension cable
It influences, high-tension cable gantry uses aluminum alloy materials, and light-weight, easy for installation, high-tension cable gantry uses square structure, single
Edge lengths 40cm, high-tension cable are passed through from centre, and high-tension cable gantry stretches out blower foundation edge 15m, and hull edge is apart from wind
Machine basis 10m, therefore, high-tension cable gantry end can be elongated to hull close to midline position, hull wide 13m, middle line 6.5m；
High-tension cable gantry uses triangle fixed form, is fixed on blower foundation with wirerope, high-tension cable gantry
One end be fixed to blower foundation end with expansion bolt, the other end vacantly arrives the surface of ship, by the fixed form of triangle,
Guarantee that wind is blown over from all directions will not all shake；
High-tension cable gantry is vacantly in the top of ship, tidal range maximum 7m；In lowest water level, high-tension cable gantry disembarkation first
Plate 10m；In highest water level, high-tension cable gantry disembarkation deck 3m；High-tension cable reserves the active length of 20m, guarantees daily
Rise, at ebb tide, high-tension cable can be move freely, and hull and high-tension cable gantry keep safe distance.
Further, used length of hull 76m, wide 13m absorb water 1m at light load, and boat deck is from water surface 3m；Low voltage crossing
Test equipment is configured with 3 test containers and 1 office's container, tests the long * wide * high of container are as follows: 12m*2.4m*
2.4m, the long * wide * high of office's container are as follows: 6m*2.4m*2.4m；
3 test containers are arranged side by side in parallel, test container front end disembarkation head distance 20m, test container spacing
From 0.8m, side is reserved with the pedestrian passage of 2.5m, tests container from office container distance 20m；Higher-pressure region on ship
Domain is fenced up with safe fence and hangs warning sign；
Hull middle position and blower foundation distance 10m, high-tension cable gantry reach test container high-pressure side；
After the position of ship is adjusted to setting position, using 4 positioning of anchors, on the bow 2 anchors, 2 anchors of stern prevent ship respectively
It moves in all directions；
The axis of ship considers the direction in seawater fluctuation tide direction and wind, makes axis and the seawater fluctuation tide direction of ship as far as possible
It is parallel with wind direction, reduce the resistance that ship is subject to, keeps hull more stable；
Wave gets to the test container on hull in order to prevent, and guarantees safety when pedestrian on the bow walks with stern,
Increase paulin in test container two sides to be protected.
Compared with prior art, the present invention have the following advantages that with the utility model has the advantages that
1, the influence to entire wind power plant can be reduced, when test avoids the blower to same sea cable route from all stopping
The loss of wind field generated energy is effectively reduced in machine.
2, at sea building the wind power plants of booster stations, low voltage crossing test equipment can not be placed on land, we
Case provides one kind and at sea carries out testing feasible and safe method.
Detailed description of the invention
Fig. 1 is China Wind Power generating set low voltage crossing standard requirements schematic diagram.
Fig. 2 is to carry out the schematic diagram of low voltage crossing test in land.
Fig. 3 is that low voltage crossing test equipment is placed on booster stations in land to access power grid schematic diagram.
Fig. 4 is that low voltage crossing test equipment is at sea accessed power network line schematic diagram.
Fig. 5 is that at sea low voltage crossing test equipment accesses 35KV route primary circuit schematic diagram.
Fig. 6 is high-tension cable gantry paving mode schematic diagram.
Fig. 7 is that low voltage crossing test equipment is placed into the layout on ship.
Fig. 8 is the layout of hull and seat in the plane.
Specific embodiment
The present invention is further explained in the light of specific embodiments.
Wind power generating set sea low voltage crossing detection method, concrete condition provided by the present embodiment are as follows:
Low voltage crossing test equipment is lifted on ship, and ship is reached tested blower and is nearby fixed on the positioning,
Outlet voltage by changing low voltage crossing test equipment tests tested blower, to same route when test
Other blowers do not influence, can be run with normal power generation, as shown in Figure 4.Therefore, it is tested using such scheme, it is only right
Tested blower has an impact, and generated energy loss can be preferably minimized.
Form of the high-tension cable connection type of offshore wind farm using " hand in hand " looped network, the interior blower in same circuit
There is on-load switch in unit of appearing on the stage, can remotely control the division of on-load switch.
Low voltage crossing needs for low voltage crossing test equipment to be concatenated into original sea cable route when testing, and temporarily increases
Add 35KV cable connection, it is as shown in Figure 5 that low voltage crossing test equipment accesses 35KV route primary circuit.In order to set up safely
35KV high-tension cable, while avoiding wave, sea wind, influence of the ebb to high-tension cable of rising, high-voltage electricity is set up by way of Fig. 6
Cable gantry and laying high-tension cable.
High-tension cable gantry uses aluminum alloy materials, light-weight, easy for installation；High-tension cable gantry is using square knot
Structure, unilateral length 40cm, high-tension cable are passed through from centre.High-tension cable gantry stretch out blower foundation edge 15m, hull edge away from
From blower foundation 10m, therefore, high-tension cable gantry end may be elongated to hull close to midline position (the wide 13m of hull, middle line
6.5m)。
High-tension cable gantry uses triangle fixed form, is fixed on blower foundation with wirerope, high-tension cable gantry
One end be fixed to blower foundation end with expansion bolt, the other end vacantly arrives the surface of ship, by the fixed form of triangle,
Guarantee that wind is blown over from all directions will not all shake.
High-tension cable gantry is vacantly in the top of ship, tidal range the largest of about 7m.In lowest water level, high-tension cable gantry disembarkation
Deck about 10m；In highest water level, high-tension cable gantry disembarkation deck about 3m.Cable reserves the movable length of 20m, guarantees every
It rises at ebb tide, and high-tension cable can be move freely, and hull and high-tension cable gantry keep safe distance.
Used length of hull 76m, wide 13m absorb water about 1m at light load, and boat deck is from the water surface about 3m.Low voltage crossing is surveyed
Examination equipment be placed on inside the seavan of standard, low voltage crossing test equipment be placed into the layout on ship as shown in fig. 7,
Configured with 3 test containers and 1 office's container, the long * wide * high of container is tested about are as follows: 12m*2.4m*2.4m is done
The public long * wide * high of room container is about are as follows: 6m*2.4m*2.4m.
3 test containers are arranged side by side in parallel, test container front end disembarkation head distance 20m, test container spacing
From 0.8m, side is reserved with the pedestrian passage of 2.5m, tests container from office container distance 20m.It is height in dotted line frame
Intermediate pressure section is fenced up with safe fence and hangs warning sign.
Hull middle position and blower foundation distance 10m, retain certain adjustment space, and high-tension cable gantry reaches survey
Try container high-pressure side.
After the position of ship is adjusted to setting position, using 4 positioning of anchors, on the bow 2 anchors, 2 anchors of stern prevent ship respectively
It moves in all directions.The axis of ship considers seawater fluctuation tide direction, the direction of wind, make as far as possible the axis of ship as far as possible with seawater
Fluctuation tide direction is parallel with wind direction, and the windward side of such hull and the forced area of seawater are minimum, and hull can be made more stable.Ship
The layout of body and seat in the plane guarantees that pedestrian exists as shown in figure 8, in addition, wave gets to the test container on hull in order to prevent
Safety when forward andor aft is walked increases paulin in test container two sides and is protected.
Embodiment described above is only the preferred embodiments of the invention, and but not intended to limit the scope of the present invention, therefore
All shapes according to the present invention change made by principle, should all be included within the scope of protection of the present invention.
Claims (3)
1. a kind of wind power generating set sea low voltage crossing detection method, it is characterised in that: this method is by low voltage crossing
Test equipment is lifted on ship, and ship is reached tested blower and is nearby fixed on the positioning, then low voltage crossing test is set
It is standby to be concatenated into original sea cable route, and temporarily increase the wiring of 35KV high-tension cable, and the high-tension cable connection side of offshore wind farm
Formula uses the form of " hand in hand " looped network, and the blower on same circuit has on-load switch, Neng Gouyuan in previous Fans
The division of process control on-load switch, the outlet voltage by changing low voltage crossing test equipment survey tested blower
Examination, and other blowers of same route are not influenced in test, they can normal power generation operation.
2. a kind of wind power generating set sea low voltage crossing detection method according to claim 1, it is characterised in that: be
Safe erection 35KV high-tension cable, while avoiding wave, sea wind, influence of the ebb to high-tension cable of rising, high-tension cable gantry
Light-weight, easy for installation using aluminum alloy materials, high-tension cable gantry uses square structure, unilateral length 40cm, high-voltage electricity
Cable is passed through from centre, and high-tension cable gantry stretches out blower foundation edge 15m, and hull edge is apart from blower foundation 10m, therefore, high
Voltage cable gantry end can be elongated to hull close to midline position, hull wide 13m, middle line 6.5m；
High-tension cable gantry uses triangle fixed form, is fixed on blower foundation with wirerope, the one of high-tension cable gantry
End is fixed to blower foundation end with expansion bolt, and the other end vacantly arrives the surface of ship, by the fixed form of triangle, guarantees
Wind blows over all shake from all directions；
High-tension cable gantry is vacantly in the top of ship, tidal range maximum 7m；In lowest water level, high-tension cable gantry disembarkation deck
10m；In highest water level, high-tension cable gantry disembarkation deck 3m；High-tension cable reserve 20m active length, guarantee rise daily,
At ebb tide, high-tension cable can be move freely, and hull and high-tension cable gantry keep safe distance.
3. a kind of wind power generating set sea low voltage crossing detection method according to claim 1 or 2, feature exist
In: used length of hull 76m, wide 13m absorb water 1m at light load, and boat deck is from water surface 3m；The configuration of low voltage crossing test equipment
There are 3 test containers and 1 office's container, test the long * wide * high of container are as follows: 12m*2.4m*2.4m, office's collection
Case long * wide * high are as follows: 6m*2.4m*2.4m；
3 test containers are arranged side by side in parallel, test container front end disembarkation head distance 20m, test container spacing from
0.8m, side are reserved with the pedestrian passage of 2.5m, test container from office container distance 20m；High-pressure area on ship
It is fenced up with safe fence and hangs warning sign；
Hull middle position and blower foundation distance 10m, high-tension cable gantry reach test container high-pressure side；
After the position of ship is adjusted to setting position, using 4 positioning of anchors, on the bow 2 anchors, 2 anchors of stern prevent ship each respectively
A direction is mobile；
The axis of ship considers the direction in seawater fluctuation tide direction and wind, makes the axis and seawater fluctuation tide direction and wind of ship as far as possible
To resistance parallel, that reduction ship is subject to, keep hull more stable；
Wave gets to the test container on hull in order to prevent, and guarantees that pedestrian on the bow with safety when stern walking, is surveying
Examination container two sides increase paulin and are protected.
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| CN201811568445.4A CN109725255A (en) | 2018-12-21 | 2018-12-21 | A kind of wind power generating set sea low voltage crossing detection method |
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| CN201811568445.4A CN109725255A (en) | 2018-12-21 | 2018-12-21 | A kind of wind power generating set sea low voltage crossing detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2587810A (en) * | 2019-10-02 | 2021-04-14 | Siemens Ag | Subsea Connector |
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| EP3026446A2 (en) * | 2014-11-26 | 2016-06-01 | Hamilton Sundstrand Corporation | Electrical current system including voltage drop component |
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2018
- 2018-12-21 CN CN201811568445.4A patent/CN109725255A/en active Pending
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| CN102129036A (en) * | 2011-01-07 | 2011-07-20 | 中电普瑞科技有限公司 | Movable low-voltage ride-through testing device for wind generating set |
| CN102882223A (en) * | 2011-07-11 | 2013-01-16 | 陈巍 | Water, wind, solar and biomass multi-energy integrated complementary power generation method and device |
| EP3026446A2 (en) * | 2014-11-26 | 2016-06-01 | Hamilton Sundstrand Corporation | Electrical current system including voltage drop component |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2587810A (en) * | 2019-10-02 | 2021-04-14 | Siemens Ag | Subsea Connector |
| GB2587810B (en) * | 2019-10-02 | 2022-04-06 | Siemens Ag | Subsea Connector |
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Application publication date: 20190507 |
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