LU503644B1 - A voltage monitoring and early warning method and system for an offshore wind farm - Google Patents
A voltage monitoring and early warning method and system for an offshore wind farm Download PDFInfo
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- LU503644B1 LU503644B1 LU503644A LU503644A LU503644B1 LU 503644 B1 LU503644 B1 LU 503644B1 LU 503644 A LU503644 A LU 503644A LU 503644 A LU503644 A LU 503644A LU 503644 B1 LU503644 B1 LU 503644B1
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000012544 monitoring process Methods 0.000 title claims abstract description 41
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000002159 abnormal effect Effects 0.000 claims description 71
- 238000010586 diagram Methods 0.000 claims description 30
- 230000005856 abnormality Effects 0.000 claims description 24
- 238000010276 construction Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
- F03D17/007—Wind farm monitoring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
- H02J3/0012—Contingency detection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/90—Mounting on supporting structures or systems
- F05B2240/95—Mounting on supporting structures or systems offshore
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
Abstract
A voltage monitoring and early warning method for an offshore wind farm includes the following steps: obtain the voltage information collected by different voltage detection devices, and generate the voltage progression curve according to the voltage information; collect the voltage progression curve characteristics, and relate the corresponding operating state of the first cable segment or the first power equipment to generate the operating stale corresponding library; generate the real-time voltage progression curve in the real-time monitoring of the offshore wind farm according to the voltage information obtained in real time, and analyze the real-time voltage curve according to the operating state corresponding library to determine the accurate operating state of the corresponding first cable segment or the first power equipment and complete the voltage monitoring and early warning of the offshore wind farm.
Description
A voltage monitoring and early warning method and system for an 599644 offshore wind farm
The invention relates to the technical field of wind power equipment, in particular to a voltage monitoring and early warning method and system for an offshore wind farm.
Offshore wind farms refer to offshore wind power farms with water depth of about 10 meters. Compared with onshore wind farms, the offshore wind farms have the advantages of no land resources occupied, no influence by landforms, higher wind speed, more abundant wind energy resources, larger capacity (3-5 MW) of single wind turbine and more annual utilization hours. However, the offshore wind farms are also technically difficult in construction, and their construction cost is generally2-3 times that of onshore wind farms.
In the construction process of offshore wind farms, a number of wind turbines are used, complex cable networks are required to be deployed under the sea, and supporting power equipment is required to be installed. Because the wind turbines are located in the sea and easily struck by lightning, there will be overvoltage problem with the corresponding equipment and submarine cables, causing damage to the corresponding equipment and submarine cables. In addition to the overvoltage problem caused by lightning, power frequency overvoltage, operating overvoltage and other problems will cause damage to the power equipment and submarine cables.
Therefore, in order to avoid damage to the first power equipment and cables, it is necessary to determine the abnormal voltage situation of each equipment and cable applied in the offshore wind farms in a timely manner.
The invention aims to provide a monitoring and early warning method and system which can timely monitor the operating state of equipment and cables in an offshore wind farm.
Therefore, the invention discloses a voltage monitoring and early warning method for an offshore wind farm, which comprises the following steps:
Obtain the voltage information collected by different voltage detection devices, and generate the voltage progression curve according to the voltage information, for which the horizontal coordinate is the time, and the vertical coordinate is the voltage value;
Collect the voltage progression curve characteristics, and relate the corresponding operating state of the first cable segment or the first power equipment to generate the operating state corresponding library;
Generate the real-time voltage progression curve in the real-time monitoring of the offshore wind farm according to the voltage information obtained in real time, and analyze thé/503644 real-time voltage curve according to the operating state corresponding library to determine the corresponding operating state of the first cable segment or the first power equipment
In some embodiments of the application, the voltage monitoring and early warning method for the offshore wind farm is improved to further determine the operating state of the first cable segment or first power equipment, including the following steps:
Establish a power relation library, which includes the relation between a first cable segment and first power equipment, and construct an influence intensity factor for the distance between the first cable segment and the first power equipment;
Determine a second cable segment or second power equipment related to the first cable segment or the first power equipment in the power relation library by the influence intensity factor when the first cable segment or the first power equipment with abnormal state is found;
Scan and extract the voltage progression curve characteristics for the second cable segment or the second power equipment, and further determine the operating state of the first cable segment or the first power equipment according to the voltage progression curve characteristics for the second cable segment or the second power equipment.
In some embodiments of the application, the operating state method is further improved to further identify the main abnormal node. The method for further determining the operating state of the first cable segment or first power equipment includes the following steps:
Establish an abnormal voltage analysis group, which includes voltage progression curve characteristics for any of the first cable segment, the first power equipment, the second cable segment and the second power equipment;
Determine whether the first cable segment or the first power equipment is the main abnormal voltage node based on the combination of curve characteristics in the abnormal voltage analysis group.
Some embodiments of the application disclose a method for determining the main abnormal node. The method for identifying the first cable segment or the first power equipment as the main abnormal node includes the following steps:
Respectively set abnormality possibility intensity factors for different cable segments and power equipment;
Determine the first cable segment or first power equipment in the abnormal voltage analysis group to be the main abnormal node if the first cable segment or first power equipment has the maximum possibility strength factor.
Some embodiments of the application also disclose a method for determining the main abnormal node. The method for further determining the operating state of the first cable segment or the first power equipment also includes the following steps: LU503644
Establish an abnormal voltage analysis library, which includes a plurality of abnormal voltage analysis groups related to abnormality checking results;
Take the current abnormal voltage analysis group as the search condition and search in the abnormal voltage analysis library; if the corresponding abnormality checking result exists, determine the first cable segment or the first power equipment as the main abnormal node according to the abnormality checking result.
Some embodiments of the application disclose a method for establishing the abnormal voltage analysis library to determine the main abnormal node through the abnormal voltage analysis library. The method for establishing the abnormal voltage analysis library includes the following steps:
Compare and analyze the abnormality checking result with the judgment result of the main abnormal node; if the abnormality checking result is different from the judgment result of the main abnormal node, relate and record the abnormal voltage analysis group and the abnormality checking result in the abnormal voltage analysis library.
Some embodiments of the application disclose the contents of the operating state. The operating state of the first cable segment or the first power equipment includes:
Lightning overvoltage state, operating overvoltage state, power frequency overvoltage state and low voltage state.
In some embodiments of the application, the monitoring and early warning method is further improved to make it easy for the staff to analyze and determine the operating state of the offshore wind farm. The method also includes the following steps:
Establish a cable network diagram, which is used to represent the position relation of the cable, and set the equipment node on the cable network diagram according to the relative cable position of the first power equipment;
Relate the real-time voltage progression curve to the cable node or equipment node of the cable network diagram;
Express an alarm at the cable node or equipment node corresponding to the cable network diagram if the real-time voltage progression curve is abnormal.
Some embodiments of the application also disclose a voltage monitoring and early warning system for an offshore wind farm, which comprises:
A voltage detection device, which is used to collect the voltage information of the first cable segment or the first power equipment;
A voltage information reading and analysis module, which is used to analyze the voltage information and generate the voltage progression curve, for which the horizontal coordinate is the time, and the vertical coordinate is the voltage value; LU503644
An operating state corresponding library, which is provided with a plurality of voltage progression curve characteristics, and each curve characteristic corresponds to an operating state;
A curve characteristic analysis module, which is used to scan and analyze the voltage progression curve, determine the voltage progression curve characteristics, and determine the operating state of the first cable segment or the first power equipment according to the operating state corresponding library.
In some embodiments of the application, the monitoring and early warning system is improved, which also comprises:
A display module, which is used to display the cable network diagram, and the cable network diagram is used to represent the cable position relation, and set the equipment node on the cable network diagram according to the relative cable position of the first power equipment, relate the real-time voltage progression curve to the cable node or equipment node of the cable network diagram, and express an alarm at the cable node or equipment node corresponding to the cable network diagram if the real-time voltage progression curve is abnormal.
The application discloses a voltage monitoring and early warning method and system for an offshore wind farm. The application of the monitoring and early warning method and system to the offshore wind farm has the following advantages:
The voltage progression curve is generated according to the voltage information collected by the voltage detection device, and the curve characteristics are extracted by analyzing the voltage progression curve and retrieved in the operating state corresponding library to determine the corresponding operating state and then accurately determine the state of the power equipment and cable segment.
The technical proposal of the invention is further described in detail by the drawing and embodiments.
Fig. 1 shows the steps of a voltage monitoring and early warning method for an offshore wind farm in the embodiments of the application.
The technical proposal of the invention is further described by the drawing and embodiments.
The technical proposal of the invention is clearly and completely described below in combination with the drawing and embodiments. It should be understood that the preferred embodiments described here are only used to describe and explain the invention and cannot be understood as restrictions on the invention. Skilled personnel in the field may make some non-essential improvements and adjustments according to the following contents of the inventid:!505644
In the invention, unless otherwise expressly specified and limited, the technical terms used in the application should have ordinary meanings understood by the technicians of the invention. The terms “connected together”, “connected”, “fixed”, “set” and the like should be understood in 5 broad sense, namely, fixedly connected or detachably connected or integrated, or directly connected or indirectly connected through an intermediary, or mechanically connected or electrically connected. Unless otherwise expressly limited, the specific meanings of the terms in the invention may be understood by ordinary technicians in the field as the case may be. Unless otherwise expressly specified and limited, if the first characteristic is “above” or “below” the second characteristic, the first characteristic may be in direct contact with the second characteristic, or the first characteristic is in direct contact with the second characteristic through an intermediary. Moreover, the first characteristic is “over”, “above” or “on” the second characteristic, the first characteristic may be directly or diagonally above the second characteristic, or simply indicates that the level of the first characteristic is higher than that of the second characteristic. The first characteristic is “below”, “under” or “beneath” the second characteristic, the first characteristic may be directly or diagonally below the second characteristic, or simply indicates that the level of the first characteristic is lower than that of the second characteristic. Relational terms such as first and second are used only to distinguish one entity or operation from another one, and do not necessarily require or imply any such actual relation or order between these entities or operations. It should be noted that similar labels and letters indicate similar items in the drawings below. Therefore, once an item is defined in one drawing, no further definition or explanation is required in subsequent drawings.
The invention aims to provide a monitoring and early warning method and system which can timely monitor the operating state of equipment and cables in an offshore wind farm.
Therefore, the invention discloses a voltage monitoring and early warning method for an offshore wind farm, as shown in Fig. 1, including the following steps:
Step S100: Obtain the voltage information collected by different voltage detection devices, and generate the voltage progression curve according to the voltage information, for which the horizontal coordinate is the time, and the vertical coordinate is the voltage value.
It should be understood that the cable node is the first submarine cable segment detected by the voltage detection device.
Step S200: Collect the voltage progression curve characteristics, and relate the corresponding operating state of the first cable segment or the first power equipment to generate the operating state corresponding library.
It should be understood that the operating state of the first cable segment or first powek/503644 equipment can be based on long-term manual analysis and manual recording.
Step S300: Generate the real-time voltage progression curve in the real-time monitoring of the offshore wind farm according to the voltage information obtained in real time, and analyze the real-time voltage curve according to the operating state corresponding library to determine the corresponding operating state of the first cable segment or the first power equipment.
In some embodiments of the application, the voltage monitoring and early warning method for the offshore wind farm is improved to further determine the operating state of the first cable segment or first power equipment, including the following steps:
Step 1: Establish a power relation library, which includes the relation between a first cable segment and first power equipment, and construct an influence intensity factor for the distance between the first cable segment and the first power equipment.
It should be understood that tthe influence intensity factor can be understood as the intensity variable of the voltage interaction between the first cable segment and the first power equipment. If the synchronously boosted voltage is closer, the influence intensity factor will be larger.
Step 2: Determine a second cable segment or second power equipment related to the first cable segment or the first power equipment in the power relation library by the influence intensity factor when the first cable segment or the first power equipment with abnormal state is found;
Step 3: Scan and extract the voltage progression curve characteristics for the second cable segment or the second power equipment, and further determine the operating state of the first cable segment or the first power equipment according to the voltage progression curve characteristics for the second cable segment or the second power equipment.
It should be understood that further determining the operating state of the first cable segment or the first power equipment can be understood as determining whether the voltage detection device is abnormal or whether there is a voltage problem due to the exception of other related cable segments or power equipment.
In some embodiments of the application, the operating state method is further improved to further identify the main abnormal node. The method for further determining the operating state of the first cable segment or first power equipment includes the following steps:
Step 1: Establish an abnormal voltage analysis group, which includes voltage progression curve characteristics for any of the first cable segment, the first power equipment, the second cable segment and the second power equipment.
Step 2: Determine whether the first cable segment or the first power equipment is the main abnormal voltage node based on the combination of curve characteristics in the abnormal voltagd/503644 analysis group.
Some embodiments of the application disclose a method for determining the main abnormal node. The method for identifying the first cable segment or the first power equipment as the main abnormal node includes the following steps:
Step 1: Respectively set abnormality possibility intensity factors for different cable segments and power equipment.
It should be understood that the abnormality possibility intensity factor can be understood as the degree of probability of abnormalities in different cable segments and power equipment.
Step 2: Determine the first cable segment or first power equipment in the abnormal voltage analysis group to be the main abnormal node if the first cable segment or first power equipment has the maximum possibility strength factor.
Some embodiments of the application also disclose a method for determining the main abnormal node. The method for further determining the operating state of the first cable segment or the first power equipment also includes the following steps:
Step 1: Establish an abnormal voltage analysis library, which includes a plurality of abnormal voltage analysis groups related to abnormality checking results.
Step 2: Take the current abnormal voltage analysis group as the search condition and search in the abnormal voltage analysis library; if the corresponding abnormality checking result exists, determine the first cable segment or the first power equipment as the main abnormal node according to the abnormality checking result.
Some embodiments of the application disclose a method for establishing the abnormal voltage analysis library to determine the main abnormal node through the abnormal voltage analysis library. The method for establishing the abnormal voltage analysis library includes the following steps: compare and analyze the abnormality checking result with the judgment result of the main abnormal node; if the abnormality checking result is different from the judgment result of the main abnormal node, relate and record the abnormal voltage analysis group and the abnormality checking result in the abnormal voltage analysis library.
Wherein, the abnormality checking result can be the onsite checking result.
Some embodiments of the application disclose the contents of the operating state. The operating state of the first cable segment or the first power equipment includes lightning overvoltage state, operating overvoltage state, power frequency overvoltage state and low voltage state.
In some embodiments of the application, the monitoring and early warning method is further improved to make it easy for the staff to analyze and determine the operating state of thé/503644 offshore wind farm. The method also includes the following steps:
Step 1: Establish a cable network diagram, which is used to represent the position relation of the cable, and set the equipment node on the cable network diagram according to the relative cable position of the first power equipment.
It should be understood that the position relation of the cable network diagram includes the horizontal position relation, including the angle between different cables, the interconnected nodes, and the extension length and shape of the cable.
Step 2: Relate the real-time voltage progression curve to the cable node or equipment node of the cable network diagram.
Step 3: and express an alarm at the cable node or equipment node corresponding to the cable network diagram if the real-time voltage progression curve is abnormal.
It should be understood that the alarm can be expressed by flashing or color warning at the cable node or equipment node.
Some embodiments of the application also disclose a voltage monitoring and early warning system for an offshore wind farm, which comprises a voltage detection device, a voltage information reading and analysis module, a curve characteristic analysis module and an operating state corresponding library.
The voltage detection device is used to collect the voltage information of the first cable segment or the first power equipment.
The voltage information reading and analysis module is used to analyze the voltage information and generate the voltage progression curve, for which the horizontal coordinate is the time, and the vertical coordinate is the voltage value.
The operating state corresponding library is provided with a plurality of voltage progression curve characteristics, and each curve characteristic corresponds to an operating state.
The curve characteristics analysis module is used to scan and analyze the voltage progression curve, determine the voltage progression curve characteristics, and determine the operating state of the first cable segment or the first power equipment according to the operating state corresponding library.
In some embodiments of the application, the monitoring and early warning system is improved, which also comprises a display module.
The display module is used to display the cable network diagram, and the cable network diagram is used to represent the cable position relation, and set the equipment node on the cable network diagram according to the relative cable position of the first power equipment, Relate the real-time voltage progression curve to the cable node or equipment node of the cable netwoHk#505644 diagram, and express an alarm at the cable node or equipment node corresponding to the cable network diagram if the real-time voltage progression curve is abnormal.
It should be understood that the alarm can be expressed by flashing or color warning at the cable node or equipment node.
The application discloses a voltage monitoring and early warning method and system for an offshore wind farm. The application of the monitoring and early warning method and system to the offshore wind farm has the following advantages: the voltage progression curve is generated according to the voltage information collected by the voltage detection device, and the curve characteristics are extracted by analyzing the voltage progression curve and retrieved in the operating state corresponding library to determine the corresponding operating state and then accurately determine the state of the power equipment and cable segment.
Finally, it should be noted that the above embodiments are used only to describe the technical proposal of the invention and not to restrict it. Although the invention is described in detail by reference to the preferred embodiments, the ordinary technicians in the field should understand that the technical proposal of the invention may still be modified or substituted equivalently, and such modification or equivalent substitution cannot make the modified technical proposal depart from the spirit and scope of the technical proposal of the invention.
Claims (10)
1. A voltage monitoring and early warning method for an offshore wind farm, which is characterized in that the voltage monitoring and early warning method includes the following steps: Obtain the voltage information collected by different voltage detection devices, and generate the voltage progression curve according to the voltage information, for which the horizontal coordinate is the time, and the vertical coordinate is the voltage value; Collect the voltage progression curve characteristics, and relate the corresponding operating state of the first cable segment or the first power equipment to generate the operating state corresponding library; Generate the real-time voltage progression curve in the real-time monitoring of the offshore wind farm according to the voltage information obtained in real time, and analyze the real-time voltage curve according to the operating state corresponding library to determine the corresponding operating state of the first cable segment or the first power equipment
2. À voltage monitoring and early warning method for an offshore wind farm according to Claim 1, which is characterized in that the voltage monitoring and early warning method also includes the following steps: Establish a power relation library, which includes the relation between a first cable segment and first power equipment, and construct an influence intensity factor for the distance between the first cable segment and the first power equipment; Determine a second cable segment or second power equipment related to the first cable segment or the first power equipment in the power relation library by the influence intensity factor when the first cable segment or the first power equipment with abnormal state is found; Scan and extract the voltage progression curve characteristics for the second cable segment or the second power equipment, and further determine the operating state of the first cable segment or the first power equipment according to the voltage progression curve characteristics for the second cable segment or the second power equipment.
3. A voltage monitoring and early warning method for an offshore wind farm according to Claim 2, which is characterized in that a method for further determining the operating state of the first cable segment or first power equipment includes the following steps: Establish an abnormal voltage analysis group, which includes voltage progression curve characteristics for any of the first cable segment, the first power equipment, the second cable segment and the second power equipment;
Determine whether the first cable segment or the first power equipment is the main abnorkt#103644 voltage node based on the combination of curve characteristics in the abnormal voltage analysis group.
4. A voltage monitoring and early warning method for an offshore wind farm according to Claim 3, which is characterized in that a method for identifying the first cable segment or the first power equipment as the main abnormal node includes the following steps: Respectively set abnormality possibility intensity factors for different cable segments and power equipment; Determine the first cable segment or first power equipment in the abnormal voltage analysis group to be the main abnormal node if the first cable segment or first power equipment has the maximum possibility strength factor.
5. A voltage monitoring and early warning method for an offshore wind farm according to Claim 3, which is characterized in that a method for further determining the operating state of the first cable segment or the first power equipment also includes the following steps: Establish an abnormal voltage analysis library, which includes a plurality of abnormal voltage analysis groups related to abnormality checking results; Take the current abnormal voltage analysis group as the search condition and search in the abnormal voltage analysis library; if the corresponding abnormality checking result exists, determine the first cable segment or the first power equipment as the main abnormal node according to the abnormality checking results.
6. A voltage monitoring and early warning method for an offshore wind farm according to Claim 5, which is characterized in that a method for establishing the abnormal voltage analysis library includes the following steps: Compare and analyze the abnormality checking result with the judgment result of the main abnormal node; if the abnormality checking result is different from the judgment result of the main abnormal node, relate and record the abnormal voltage analysis group and the abnormality checking result in the abnormal voltage analysis library.
7. A voltage monitoring and early warning method for an offshore wind farm according to Claim 1, which is characterized in that the operating state of the first cable segment or the first power equipment includes: Lightning overvoltage state, operating overvoltage state, power frequency overvoltage state and low voltage state.
8. A voltage monitoring and early warning method for an offshore wind farm according to Claim 1, which is characterized in that the voltage monitoring and early warning method also includes the following steps:
Establish a cable network diagram, which is used to represent the position relation ofl##203644 cable, and set the equipment node on the cable network diagram according to the relative cable position of the first power equipment; Relate the real-time voltage progression curve to the cable node or equipment node of the cable network diagram; Express an alarm at the cable node or equipment node corresponding to the cable network diagram if the real-time voltage progression curve is abnormal.
9. A voltage monitoring and early warning system for an offshore wind farm, which is characterized in that the voltage monitoring and early warning system comprises: A voltage detection device, which is used to collect the voltage information of the first cable segment or the first power equipment; A voltage information reading and analysis module, which is used to analyze the voltage information and generate the voltage progression curve, for which the horizontal coordinate is the time, and the vertical coordinate is the voltage value; An operating state corresponding library, which is provided with a plurality of voltage progression curve characteristics, and each curve characteristic corresponds to an operating state; A curve characteristic analysis module, which is used to scan and analyze the voltage progression curve, determine the voltage progression curve characteristics, and determine the operating state of the first cable segment or the first power equipment according to the operating state corresponding library.
10. A voltage monitoring and early warning system for an offshore wind farm according to Claim 9, which is characterized in that the voltage monitoring and early warning system also comprises: A display module, which is used to display the cable network diagram, and the cable network diagram is used to represent the cable position relation, and set the equipment node on the cable network diagram according to the relative cable position of the first power equipment, relate the real-time voltage progression curve to the cable node or equipment node of the cable network diagram, and express an alarm at the cable node or equipment node corresponding to the cable network diagram if the real-time voltage progression curve is abnormal. Relate the real-time voltage progression curve to the cable node or equipment node of the cable network diagram, and express an alarm at the cable node or equipment node corresponding to the cable network diagram if the real-time voltage progression curve is abnormal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310021270.XA CN116148519B (en) | 2023-01-06 | 2023-01-06 | Marine wind farm voltage monitoring and early warning method and system |
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| LU503644B1 true LU503644B1 (en) | 2023-09-14 |
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| LU503644A LU503644B1 (en) | 2023-01-06 | 2023-03-14 | A voltage monitoring and early warning method and system for an offshore wind farm |
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| DE102007017870B4 (en) * | 2007-04-13 | 2022-03-31 | Senvion Gmbh | Method for operating a wind turbine in the event of overvoltages in the network |
| CN101882798B (en) * | 2010-06-18 | 2012-10-17 | 深圳市禾望电气有限公司 | LVRT test control device |
| CN102253338A (en) * | 2011-05-30 | 2011-11-23 | 新疆大学 | Intelligent failure diagnosis method for frequency converter of wind power unit |
| JP6165644B2 (en) * | 2014-01-24 | 2017-07-19 | 三菱重工業株式会社 | Wind farm and its operating method |
| KR101423212B1 (en) * | 2014-05-22 | 2014-07-24 | 전북대학교산학협력단 | Voltage control system and method at the point of common coupling of wind power plant |
| CN105224774B (en) * | 2015-11-11 | 2018-01-30 | 广东电网有限责任公司电力调度控制中心 | Operation states of electric power system emulation mode and system |
| CN106203875A (en) * | 2016-07-19 | 2016-12-07 | 广西电网有限责任公司电力科学研究院 | A kind of model for power equipment health state evaluation |
| CN114636895A (en) * | 2022-03-11 | 2022-06-17 | 安徽一天电气技术股份有限公司 | Cable AI trouble early warning system |
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2023
- 2023-01-06 CN CN202310021270.XA patent/CN116148519B/en active Active
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| CN116148519B (en) | 2024-01-26 |
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