CN117429567B - Floating type offshore wind power cabin liquid level monitoring device and assessment method - Google Patents
Floating type offshore wind power cabin liquid level monitoring device and assessment method Download PDFInfo
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- G—PHYSICS
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- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
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- B63B45/00—Arrangements or adaptations of signalling or lighting devices
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- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
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Abstract
A floating offshore wind power cabin liquid level monitoring device, wherein a pontoon main body at least comprises 1 fixed ballast tank and 1 adjustable ballast tank; the top of the ballast cabin is provided with acquisition devices in a distributed manner, and the acquisition devices are used for acquiring cabin liquid level data; the empty cabin is internally provided with a liquid level acquisition device which is used for measuring liquid level and early warning when unexpected water inflow occurs in the empty cabin, and the liquid level acquisition device are connected with a computer; an evaluation method comprising the steps of: a liquid level acquisition device is arranged in each cabin of the floating offshore wind power platform, real-time liquid level data of all cabins are acquired, and the data are transmitted to an external computer terminal; the external computer terminal analyzes and obtains the real-time water quantity of each cabin according to the input liquid level data; the cabin is filled with water and drained for ballast during hauling or construction; repeating the step 2, and importing a structural model of the floating body into an external computer terminal; and obtaining the water level of the cabins, and comparing the water level preset values of the cabins except for the reserved ballast tank in normal operation.
Description
Technical Field
The invention relates to the technical field of offshore wind power, in particular to a floating type offshore wind power cabin liquid level monitoring device and an evaluation method.
Background
With the gradual development of offshore wind power towards large-scale and deep sea areas, the development of the offshore wind power adopting the traditional fixed foundation faces heavy technical bottlenecks such as high foundation cost, difficult construction and installation and the like, and under the condition, floating wind power is adopted as a main technical solution. The floating offshore wind power is characterized in that ballast leveling is needed to be carried out on the cabin due to different draught during construction installation, hauling and normal operation, the water level of the cabin is generally estimated through a ballast pump according to the flow and the time of water filling and draining or in a visual mode, the efficiency of the method is low, and the deviation between the water level precision of the cabin and a design value is easy to occur; at present, most floating units adopt static ballasting, namely, the cabin water level cannot be adjusted in real time according to the running state of a fan or the external environment, and the actual ballasting water level cannot be monitored, so that the real-time gravity center and floating center of the structure are obtained, and great inconvenience is brought;
Specifically, the following technical problems exist:
Cabin liquid level fluctuation and sloshing: 1. the floating foundation is subjected to wind and wave current in operation, and the liquid level of a part of cabins which are not full of cabins fluctuates and shakes, so that the motion state of the floating body is influenced;
2. Multi-compartment level measurement: floating foundations are typically made up of a plurality of separate cabins, each of which requires a level measurement;
3. The floating foundation is required to be filled with water and drained when in towing or installation, and at present, most of the floating foundation is subjected to water level monitoring by means of ballast pump flow and filling and draining time, so that monitoring data are not accurate enough; 4. the problems that the cabin is damaged, the cabin door is corroded to leak water and the like possibly occur during the operation of the floating type offshore wind power platform, so that the cabin liquid level is changed, or the cabin liquid level is changed due to the fact that water enters the cabin which is an empty cabin originally;
5. at present, the whole gravity center and floating center data feedback of the structure can not be carried out according to real-time liquid level data, and meanwhile, a ballast system is mobilized and adjusted to fill and drain water, so that the structure is balanced;
The application publication number CN218217555U discloses a ship cabin liquid level alarm system based on MQTT, which provides real-time reliable message service for connecting remote equipment with few codes and limited bandwidth; as an instant messaging protocol with low cost and low bandwidth occupation, the processing pressure of a network can be reduced, and more network resources are given to remote control service with real-time requirements;
The application publication number CN115033032A discloses a cabin liquid level monitoring device and a monitoring system, wherein the monitoring device judges whether the state data acquired by an acquisition module accords with a first preset condition through a controller, and if so, the water inlet valve is automatically controlled to be closed and the water outlet valve is automatically controlled to be opened; according to the invention, the state data of the ship cabin is automatically monitored, and when the dangerous state of the ship cabin in a high liquid level is detected, the water inlet valve and the water outlet valve are timely triggered to automatically process, so that the safety of monitoring the ship cabin is improved; when the ship cabin is detected to be in a dangerous state with low liquid level, two valves are triggered in time to automatically control the liquid to be led into the cabin, so that the effectiveness and the reliability of liquid level height monitoring are improved;
the application publication number CN115963849A discloses an anti-subversion automatic load regulation system of a high-efficiency safe operation ship, which receives a flow request of a transverted pump platform sent by a ship cabin through a data cloud of the transverted pump platform, writes the flow request into a remote control valve water inlet and outlet control module according to the intelligent water inlet demand and trigger condition, and calls information in a cabin liquid level balance algorithm calculation module to be matched with the information of the current regulation cabin end in the process of the ship liquid level by a transverted pump full-brake regulation liquid level module, thereby completing the control of the transverted pump platform, improving the utilization rate of the information of the transverted pump platform and the control data management force of the transverted pump platform, and enhancing the flow control quality of the transverted pump;
The prior art cannot overcome the technical defects, and therefore technical improvements are needed to solve the difficulties.
Disclosure of Invention
In view of the above, the invention aims to provide a floating type offshore wind power cabin liquid level monitoring device and an evaluation method, which solve the complex balance technical problems of fluctuation and shaking of the existing cabin liquid level and the resultant linkage change of the gravity center and the floating center.
The technical scheme adopted by the invention is that in order to achieve the aim and other related aims, the following technical scheme is provided:
a floating offshore wind pod level monitoring device, each pontoon body comprising at least one compartment, each pontoon body comprising at least 1 fixed ballast tank and 1 adjustable ballast tank; the top of the ballast cabin is provided with acquisition devices in a distributed manner, and the acquisition devices are used for acquiring cabin liquid level data; the empty cabin is internally provided with a liquid level acquisition device which is used for measuring liquid level and early warning when unexpected water inflow occurs in the empty cabin, and the liquid level acquisition device are connected with a computer.
The application relates to a technical scheme of a floating type offshore wind power cabin liquid level monitoring device, which further comprises the following technical characteristics:
preferably, the floating foundation is a three-column semi-submersible foundation and at least comprises three pontoon bodies; the pontoon main bodies are connected through a cross brace.
Preferably, the outer wall of the floating foundation structure is provided with a sensor for collecting the draft of the upright column in the floating foundation structure.
An evaluation method for monitoring the liquid level of a floating offshore wind power cabin comprises the following steps:
Step 1: a liquid level acquisition device is arranged in each cabin of the floating offshore wind power platform, real-time liquid level data of all cabins are acquired, and the data are transmitted to an external computer terminal;
Step 2: the external computer terminal analyzes and obtains the real-time water quantity of each cabin according to the input liquid level data;
step 3: the cabin is filled with water and drained for ballast during hauling or construction;
Step 4: repeating the step 2, and importing a structural model of the floating body into an external computer terminal;
step 5: and obtaining the water level of the cabins, and comparing the water level preset values of the cabins except for the reserved ballast tank in normal operation.
The application relates to a technical scheme of an evaluation method for monitoring the liquid level of a floating type offshore wind power cabin, which further comprises the following technical characteristics:
Preferably, in step 1, the liquid level acquisition device obtains the elevation data of the free liquid level in the ballast tank, wherein the liquid level heights of n points are h11 and h12 … … hij respectively, and the acquired water level data points are transmitted to the computer.
Preferably, in step 2, the average water level ht1 is calculated according to the collected h11 and h12. The length of the cross section of the cabin is A, and the width is B;
and acquiring water level values acquired at different moments, calculating to obtain vt2 and vt3, and acquiring curves of the cabin water level h and the water quantity v along with time.
Preferably, in step 3, the external computer terminal sets the preset water level value of each cabin, compares the real-time water level data obtained by transmission with the preset water level value, and continuously feeds water when the preset water level value is not reached; when the preset water level value is reached, water filling is stopped, so that accurate control of the water level of the heavy ballast tank in the load adjustment process is ensured, and automatic load adjustment is realized.
Preferably, in step 3, 3 ballast tanks are installed and transported, the preset cabin water volumes are VA1, VA2 and VA3 respectively, the real-time water volume vt value of the cabin calculated in step 2 is calculated, if the cabin water level vt1 calculated by the cabin vt according to the collected water level data is smaller than VA1, the cabin 1 continuously intakes water, and if vt1 is equal to VA1, the intake of water is stopped.
Preferably, in step 4, the weight m0 of the structure is obtained, the mass of each cabin is mi=ρvi, the mass of water in cabin 1 m1=ρv1, m2=ρv2, mi=ρvi, and the weight m=m0+m1+m2..mi of the whole structure is calculated; the gravity center position of the structure is assumed to be x0, y0 and z0, the gravity center position of the water body in the cabin 1 after water filling is x1, y1 and z1, the gravity center of the water body in the cabin i is xi, yi and zi, and the gravity center position of the whole structure after water filling is x＝(x0+x1+x2+......xi)/(m0+m1+m2+...mi),y＝(y0+y1+y2+......yi)/(m0+m1+m2+...mi),z＝(z0+z1+z2+......zi)/(m0+m1+m2+...mi).
Preferably, the draft of each upright post is obtained and transmitted to a computer, and the obtained water level data of each cabin is obtained to obtain the floating center positions x2, y2 and z2 of the structure under the draft.
Preferably, in step 5, when the deviation between the cabin water level and the preset water level value is too large, an early warning is provided, and the ballast device is triggered to perform water filling/draining at the same time, so that the cabin water level and the preset water level value are kept consistent.
Preferably, in step 5, the deviation of the preset water level is set to be 10%, and for a cabin which is designed to be full, when the liquid level of the cabin is monitored to be reduced by 10% during operation, the ballast device is triggered to fill the cabin; for a cabin designed as an empty cabin, when the preset water level of the cabin increases by 10%, triggering a ballast device of the cabin to drain the cabin; for a cabin which is designed to be not full, when the water quantity change value of the cabin reaches 10% of the preset water quantity, the ballast device is triggered to fill or drain the cabin so as to adjust to the designed water level.
The beneficial effects of the invention are as follows:
1. The floating foundation platform liquid level monitoring and evaluation can be used for monitoring the liquid level of each cabin of the floating body, so that the cabin water quantity can be conveniently and accurately mastered during construction and load adjustment; the water level can be monitored during normal operation, the actual gravity center and the floating center of the structure can be obtained through calculation, early warning can be sent out when the cabin water level changes too much, meanwhile, the ballast device is triggered to fill and drain water, and the floating body can be ensured to be stable.
2. The cabin water level real-time monitoring device enables construction load adjustment to better grasp cabin water quantity and be more accurate; through real-time early warning, center of gravity and floating center calculation, automatic water filling and draining are realized, and the stability of the floating body is ensured.
Drawings
FIG. 1 is a flow chart of an evaluation method for monitoring the liquid level of a floating offshore wind turbine cabin according to the invention;
FIG. 2 is a collected elevation data map of a floating offshore wind turbine level monitoring device of the present invention;
FIG. 3 is a perspective view of a floating offshore wind turbine cabin level monitoring device of the present invention;
FIG. 4 is a schematic diagram of the sensor position of a floating offshore wind turbine cabin level monitoring device of the present invention;
FIG. 5 is a schematic diagram of the center of buoyancy and center of gravity of a floating offshore wind turbine cabin level monitoring device of the present invention after application;
FIG. 6 is a schematic diagram of the center of buoyancy and center of gravity of a floating offshore wind turbine cabin level monitoring device of the present invention after application;
FIG. 7 is a rotated view of FIG. 1;
In the figure:
1. A cabin A; 2. a cabin B; 3. a cabin C; 4. a sensor.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to be limiting.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
3-6, A floating offshore wind farm compartment level monitoring device, each pontoon body comprising at least one compartment, each pontoon body comprising at least 1 fixed ballast tank and 1 adjustable ballast tank; the top of the ballast cabin is provided with acquisition devices in a distributed manner, and the acquisition devices are used for acquiring cabin liquid level data; the empty cabin is internally provided with a liquid level acquisition device which is used for measuring liquid level and early warning when unexpected water inflow occurs in the empty cabin, and the liquid level acquisition device are connected with a computer; the floating foundation is a three-upright semi-submersible foundation and at least comprises three pontoon main bodies; the pontoon main bodies are connected through a cross brace; the outer wall of the floating foundation is provided with a sensor 4 for collecting the draft of the upright column in the floating foundation structure.
As shown in figure 3, the floating type offshore wind power cabin liquid level monitoring device can adopt a three-upright semi-submersible type foundation which is mature at present, and at least comprises three pontoon bodies, wherein the pontoon bodies are connected through cross braces; each pontoon body comprises at least one compartment, and each pontoon body comprises at least 1 fixed ballast tank and 1 adjustable ballast tank.
Referring to fig. 1, 2 and 7, an evaluation method for monitoring the liquid level of a floating offshore wind power cabin comprises the following steps:
Step 1: a liquid level acquisition device is arranged in each cabin of the floating offshore wind power platform, real-time liquid level data of all cabins are acquired, and the data are transmitted to an external computer terminal;
Step 2: the external computer terminal analyzes and obtains the real-time water quantity of each cabin according to the input liquid level data;
step 3: the cabin is filled with water and drained for ballast during hauling or construction;
Step 4: repeating the step 2, and importing a structural model of the floating body into an external computer terminal;
step 5: and obtaining the water level of the cabins, and comparing the water level preset values of the cabins except for the reserved ballast tank in normal operation.
Specifically, in step 1, the liquid level acquisition device obtains the elevation data of the free liquid level in the ballast tank, wherein the liquid level heights of n points are h11 and h12 … … hij respectively, and the acquired water level data points are transmitted to the computer.
Specifically, in step 2, the average water level ht1 is calculated according to the collected h11 and h12. The length of the cross section of the cabin is A, and the width is B;
and acquiring water level values acquired at different moments, calculating to obtain vt2 and vt3, and acquiring curves of the cabin water level h and the water quantity v along with time.
Specifically, in step 3, the external computer terminal sets the preset water level value of each cabin, compares the real-time water level data obtained by transmission with the preset water level value, and continuously feeds water when the preset water level value is not reached; when the preset water level value is reached, water filling is stopped, so that accurate control of the water level of the heavy ballast tank in the load adjustment process is ensured, and automatic load adjustment is realized.
Specifically, in step 3, 3 ballast tanks are installed and transported, the preset cabin water volumes are VA1, VA2 and VA3 respectively, the real-time water volume vt value of the cabin calculated in step 2 is calculated, if the cabin water level vt1 calculated by the cabin vt according to the collected water level data is smaller than VA1, the cabin 1 continuously intakes water, and if vt1 is equal to VA1, the intake of water is stopped.
Specifically, in step 4, the weight m0 of the structure is obtained, the mass of each cabin is mi=ρvi, the mass of water in cabin 1 m1=ρv1, m2=ρv2, mi=ρvi, and the weight m=m0+m1+m2..mi of the whole structure is calculated; the gravity center position of the structure is assumed to be x0, y0 and z0, the gravity center position of the water body in the cabin 1 after water filling is x1, y1 and z1, the gravity center of the water body in the cabin i is xi, yi and zi, and the gravity center position of the whole structure after water filling is x＝(x0+x1+x2+......xi)/(m0+m1+m2+...mi),y＝(y0+y1+y2+......yi)/(m0+m1+m2+...mi),z＝(z0+z1+z2+......zi)/(m0+m1+m2+...mi).
Specifically, the draft of each upright post is obtained and transmitted to a computer, and the obtained water level data of each cabin is obtained to obtain the floating center positions x2, y2 and z2 of the structure under the draft.
Specifically, in step 5, when the deviation between the cabin water level and the preset water level value is too large, an early warning is provided, and the ballast device is triggered to perform water filling/draining at the same time, so that the cabin water level and the preset water level value are kept consistent.
Specifically, in step 5, the deviation of the preset water level value is set to be 10%, and for a cabin which is designed to be full, when the liquid level of the cabin is monitored to be reduced by 10% during operation, the ballast device is triggered to fill the cabin; for a cabin designed as an empty cabin, when the preset water level of the cabin increases by 10%, triggering a ballast device of the cabin to drain the cabin; for a cabin which is designed to be not full, when the water quantity change value of the cabin reaches 10% of the preset water quantity, the ballast device is triggered to fill or drain the cabin so as to adjust to the designed water level.
In particular to an evaluation method for monitoring the liquid level of a floating offshore wind power cabin,
Step 1: a liquid level acquisition device is arranged in each cabin of the floating offshore wind power platform, real-time liquid level data of all cabins are acquired, and the data are transmitted to an external computer terminal; the installation of the collecting device is carried out according to a designed dividing scheme, wherein the pink color is an empty cabin in fig. 3, and the blue color is that the ballast cabin needs water filling/draining; the top of the ballast cabin is provided with acquisition devices in a distributed manner, and the acquisition devices are used for acquiring cabin liquid level data; the empty cabin is provided with a liquid level acquisition device appropriately according to the requirement, and early warning is carried out when accidental water inflow occurs in the empty cabin;
For example, as shown in fig. 2, assuming that the liquid level acquisition device acquires the elevation data of the free liquid level in the ballast tank and the liquid level heights of n points are h11 and h12 … … hij respectively, transmitting the acquired water level data points to an external computer;
Step 2: the external computer terminal analyzes and obtains the real-time water quantity of each cabin according to the input liquid level data;
For example, when the cabin is square, assuming that the length of the cabin cross section is a and the width is B, the average water level ht1 is calculated from the collected h11, h 12..hij data, and the water volume of the cabin at this time is calculated to be vt1=a×b×ht1. In addition, if the water volume of the cabin in other shapes is calculated, the average water level is multiplied by the area of the cross section;
Then, calculating to obtain vt2 and vt3 according to the water level values acquired at different moments, namely, curves of the cabin water level h and the water quantity v changing along with time; thus, the state of the liquid level of each cabin can be better reflected when water is filled or discharged;
step 3: when the cabins are filled and drained, a ballast scheme which needs to be achieved during hauling or construction is determined in advance, water level preset values of all cabins are set at an external computer terminal, real-time water level data obtained through transmission are compared with the water level preset values, and when the water level preset values are not achieved, water is continuously fed; when the water level preset value is reached, water filling is stopped, so that accurate control of the water level of the heavy ballast tank in the load adjustment process is ensured, and automatic load adjustment is realized;
For example, the cabin A1, the cabin B2 and the cabin C3 are ballast tanks, the preset cabin water volumes during installation and transportation are VA1, VA2 and VA3 respectively, the real-time water volume vt value of the cabin calculated in the step 2 is calculated, if the cabin water level vt1 calculated by the cabin vt according to the collected water level data is smaller than VA1, the cabin 1 continuously intakes water, and if vt1 is equal to VA1, the water intake is stopped;
Step 4: introducing a structural model of the floating body into an external computer terminal to obtain a structural weight m0, wherein the mass of each cabin is mi=ρvi, for example, the mass of water in the cabin 1 m1=ρv1, m2=ρv2, mi=ρvi, and calculating to obtain the weight m=m0+m1+m2+. Mi of the whole structure; the gravity center position of the structure itself is assumed to be x0, y0, z0, the gravity center position of the water body in the cabin 1 after water filling is x1, y1, z1, the gravity center of the water body in the cabin i is xi, yi, zi, the gravity center position of the whole structure after water filling is x= (x0+x1+x2+), x+m1+m2+), mi), y= (y0+y1+y2+), yi)/(m0+m1+m2+), mi,
z＝(z0+z1+z2+......zi)/(m0+m1+m2+...mi)；
The sensor 4 is arranged on the outer wall of the structure, the draft of the structure is collected, the draft of each upright post is transmitted to an external computer terminal, and the obtained water level data of each cabin can be analyzed to obtain the floating center position x2, y2 and z2 of the structure under specific draft by combining the structure model.
When the structure is in a normal running state and the fixed ballast tank is not required to be filled or drained, the balance is realized by adjusting the water quantity of the adjustable ballast tank, so that the trim and the heel of the floating body are reduced. When the horizontal positions of the gravity center and the floating center deviate, the preset maximum deviation value is Q, and the ballast device is triggered to adjust;
When |x1-x2 when the I is more than or equal to Q, triggering a water level load adjusting device to adjust the water level of the adjustable ballast tank;
4-6, when x2-x1 is larger than or equal to Q, calculating an optimal load adjustment scheme at a computer terminal, calculating a new position of a floating center and a gravity center by reducing or increasing the water level of an adjustable cabin, realizing that x2-x1 is smaller than Q after the water level of the cabin changes, and triggering an automatic water filling and draining device to adjust after the optimal load adjustment scheme is calculated, thereby realizing the motion response of a reduced structure;
Step 5: setting a water level preset value in normal operation for each cabin except the reserved ballast tank; when the deviation between the cabin water level and the water level preset value is too large, providing early warning, and triggering the ballast device to fill/drain water at the same time so that the cabin water level and the water level preset value are kept consistent; for a cabin which is designed to be full, when the liquid level of the cabin is monitored to be reduced by 10% in operation, the ballast device is triggered to fill the cabin; for a cabin designed as an empty cabin, when the preset water level of the cabin increases by 10%, triggering a ballast device of the cabin to drain the cabin; for a cabin which is designed to be not full of the cabin, when the water quantity change value of the cabin reaches 10% of the preset water quantity, triggering the ballast device to fill or drain the cabin so as to adjust the water level to the designed water level;
In general, the application collects real-time liquid level data of all cabins, transmits the data to a computer terminal, collects the liquid level data of each cabin through the terminal, calculates real-time water quantity of each cabin by the computer, is convenient for better grasping cabin water level change of the cabin when the cabin is filled and discharged with seawater during construction, sets preset water level values of each cabin, and triggers a ballast device to automatically stop filling water when the water level reaches the preset water level values; a model of the floating body structure is led into the terminal to obtain structure weight data, and the weight, the gravity center position and the floating center position of the whole structure are obtained through calculation according to the liquid level data of each cabin; setting a water level preset value for each cabin during normal operation, sending out an early warning prompt when the deviation between the water level and the water level preset value is overlarge, triggering the ballast device to automatically fill and drain water, and feeding back the gravity center and the floating center of the structure in real time according to the liquid level monitoring result in the process of filling and draining water to assist the floating body to reach a balanced state;
The application is mainly aimed at adopting a structure of a cabin scheme of fixed ballast and reserved dynamic adjustment; normally, after load adjustment is completed, the water level of the fixed cabin cannot actively change, the ballast cabin or the empty cabin is fixed, water filling and water draining are not performed, and the water level of the cabin is not changed in an operating state;
normally, the cabin water level should not change, and special conditions such as water leakage or water inflow caused by cabin breakage are mainly considered, so that the monitored cabin water level deviates from a preset water level value; namely, after load adjustment is completed, emergency treatment is performed when water leakage/water inflow and the like occur in the cabin.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (7)
1. The assessment method for the liquid level monitoring of the floating offshore wind power cabin is characterized by comprising the following steps of:
Step 1: a liquid level acquisition device is arranged in each cabin of the floating offshore wind power platform, real-time liquid level data of all cabins are acquired, and the data are transmitted to an external computer terminal; installing the acquisition devices according to a designed sub-tank scheme, wherein the acquisition devices are distributed at the top of the ballast tank and are used for acquiring tank liquid level data; the empty cabin is provided with a liquid level acquisition device appropriately according to the requirement, and early warning is carried out when accidental water inflow occurs in the empty cabin;
Step 2: the external computer terminal analyzes and obtains the real-time water quantity of each cabin according to the input liquid level data;
Step 3: the cabin is filled with water and drained for ballast during hauling or construction; the external computer terminal sets a preset value A of each cabin water level, compares the real-time water level data obtained through transmission with the preset value A of the water level, and continuously feeds water when the preset value A of the water level is not reached; when the water level preset value A is reached, water filling is stopped, so that accurate control of the water level of the heavy ballast tank in the load adjustment process is ensured, and automatic load adjustment is realized;
Step 4: repeating the step 2, and importing a structural model of the floating body into an external computer terminal; when the horizontal positions of the gravity center and the floating center deviate, the preset maximum deviation value is Q, and the ballast device is triggered to adjust;
Step 5: obtaining cabin water level, and comparing each cabin except the reserved ballast tank to set a water level preset value B in normal operation;
The water level preset value A is a water level preset value of a cabin for construction and installation;
the water level preset value B is the water level preset value of the cabin when the floating body platform normally operates.
2. The assessment method for monitoring the liquid level of a floating offshore wind turbine according to claim 1, wherein in the step 1, the liquid level acquisition device acquires the liquid level heights of n points, namely h11 and h12 … … hij, of the elevation data of the free liquid level in the ballast tank, and the acquired water level data points are transmitted to the computer.
3. The method for evaluating the liquid level monitoring of a floating offshore wind turbine cabin according to claim 2, wherein in step 2, an average water level ht1 is calculated according to collected h11 and h12. The length of the cross section of the cabin is A, and the width is B;
and acquiring water level values acquired at different moments, calculating to obtain vt2 and vt3, and acquiring curves of the cabin water level h and the water quantity v along with time.
4. The method for monitoring the liquid level of a floating offshore wind power cabin according to claim 1, wherein in the step 3, 3 ballast tanks are installed and transported, the preset cabin water volumes are VA1, VA2 and VA3 respectively, the real-time water volume vt value of the cabin calculated in the step 2 is calculated, if the cabin water level vt1 calculated by the cabin vt according to the collected water level data is smaller than VA1, the cabin 1 continuously intakes water, and if vt1 is equal to VA1, the water intake is stopped.
5. The method for assessing the level monitoring of a floating offshore wind turbine cabin according to claim 4, wherein in step 4, the weight m0 of the structure is obtained, the mass of each cabin is mi=ρvi, the mass of water in the cabin 1 m1=ρv1, m2=ρv2, mi=ρvi, and the weight m=m0+m1+m2+. Mi of the overall structure is calculated; the gravity center position of the structure is assumed to be x0, y0 and z0, the gravity center position of the water body in the cabin 1 after water filling is x1, y1 and z1, the gravity center of the water body in the cabin i is xi, yi and zi, and the gravity center position of the whole structure after water filling is x=(x0+x1+x2+......xi)/（m0+m1+m2+...mi）,y=(y0+y1+y2+......yi)/（m0+m1+m2+...mi）,z=(z0+z1+z2+......zi)/（m0+m1+m2+...mi）;, so that the draft of each upright post is obtained and transmitted to a computer, and the obtained water level data of each cabin is obtained, so that the floating center position x2, y2 and z2 of the structure under the draft are obtained.
6. The method for monitoring the liquid level of a floating offshore wind turbine according to claim 5, wherein in step 5, when the deviation between the water level of the turbine and the preset water level B is too large, an early warning is provided, and the ballast device is triggered to perform water filling/draining so that the water level of the turbine is kept consistent with the preset water level B.
7. The assessment method for floating offshore wind turbine level monitoring according to claim 6, wherein in step 5, the deviation of the water level preset value B is set to 10%; the ballast device is designed into a cabin full of the cabin, and when the liquid level of the cabin is monitored to be reduced by 10% during operation, the ballast device is triggered to fill the cabin with water; when the preset water level of the cabin increases by 10%, triggering a ballast device of the cabin to drain the cabin; for a cabin which is designed to be not full, when the water quantity change value of the cabin reaches 10% of the preset water quantity, the ballast device is triggered to fill or drain the cabin so as to adjust to the designed water level.
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