Fan performance verification system and method based on wind speed data forwarding

Abstract

The invention relates to the technical field of fan performance verification, and particularly discloses a fan performance verification system and method based on wind speed data forwarding, and the method comprises the steps: arranging a signal forwarding module between an anemograph of a fan and a main control cabinet, and enabling the signal forwarding module to be connected in series in a signal transmission path between the anemograph and the main control cabinet; an original wind speed signal output by the anemograph is transmitted to the signal forwarding module; the signal forwarding module is used for transmitting the original wind speed signal in two paths, one path of signal is transmitted to the main control cabinet along an original path, and the other path of signal is transmitted to the data storage unit; the data storage unit stores the received original wind speed signal, compares the stored original wind speed signal with a wind speed signal and a power signal displayed in the SCADA system, does not need to depend on an external laser radar for power curve actual measurement, and only compares the power curve corresponding to the original wind speed before and after transformation collected by the signal forwarding module. And the retest cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine performance verification, and in particular to a wind turbine performance verification system and method based on wind speed data forwarding. Background Art

[0002] In the field of wind power generation, the wind turbine power curve is the core indicator for evaluating wind turbine performance. It reflects the corresponding power generation of the wind turbine at different wind speeds and is the key basis for measuring whether the wind turbine meets the design standards and protecting the interests of the owner.

[0003] Conventional wind turbine wind speed measurement typically relies on an anemometer mounted at the rear of the nacelle. However, the wind turbine power curve specified in the main engine contract is based on the inflow wind speed at the hub. Therefore, manufacturers generally use a so-called "transfer function" to convert the wind speed data measured by the anemometer to the inflow wind speed at the hub. This processed wind speed data is then transmitted to the SCADA system for display and storage.

[0004] However, the "transfer function," a core technical secret of each manufacturer, remains an opaque "black box" operation to owners. To enhance the power curve displayed by the SCADA system, some manufacturers arbitrarily adjust the "transfer function." For example, they simply subtract 1.5 m / s from the anemometer's measured wind speed as the SCADA displayed wind speed. This results in a discrepancy between the actual wind speed and the SCADA displayed wind speed (the actual wind speed is higher, but the displayed wind speed is lower), seriously affecting the accuracy of the wind turbine's true power curve.

[0005] In order to verify the true performance of the wind turbine and prevent the manufacturer from covering up the problem of substandard wind turbine power by adjusting the "transfer function", the owner often needs to select the wind turbine for actual power curve measurement during the wind turbine entering and leaving the warranty period. This process requires the use of an external LiDAR to obtain the actual incoming wind speed in front of the hub, and then obtain the true power curve, but the cost of a single measurement for a single unit exceeds 120,000 yuan. If the actual measurement does not meet the standard, the owner will need to conduct another actual measurement and verification after the manufacturer performs performance modification, which further increases the cost. In addition, for wind turbines whose power curves are shown to be unqualified by SCADA, the owner still needs to invest in additional LiDAR measurements to confirm the problem, and it is difficult to directly obtain the manufacturer's confidential "transfer function" to judge its rationality, which brings many inconveniences to the performance evaluation and quality control of wind turbines. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is that the actual measurement cost of the wind speed of the fan is high, and it is difficult to directly obtain the manufacturer's confidential "transfer function" to judge its rationality, which brings many inconveniences to the fan performance evaluation and quality control.

[0007] The above technical problem is solved by the following technical solution: The present invention proposes a wind turbine performance verification system based on wind speed data forwarding, which includes arranging a signal forwarding module between the anemometer of the wind turbine and the main control cabinet, so that the signal forwarding module is connected in series in the signal transmission path between the anemometer and the main control cabinet;

[0008] The original wind speed signal output by the anemometer is transmitted to the signal forwarding module;

[0009] The signal forwarding module transmits the original wind speed signal in two paths, one of which is transmitted to the main control cabinet along the original path, and the other is transmitted to the data storage unit;

[0010] The data storage unit stores the received original wind speed signal and compares the stored original wind speed signal with the wind speed signal and the power signal displayed in the SCADA system.

[0011] In a preferred embodiment of the wind turbine performance verification system based on wind speed data forwarding described in the present invention: the signal forwarding module includes a surge protector and a current transmitter connected in sequence, the original wind speed signal is first transmitted to the surge protector, and then transmitted to the current transmitter after processing by the surge protector, and the current transmitter converts the original wind speed signal into at least two signals.

[0012] In a preferred embodiment of the wind turbine performance verification system based on wind speed data forwarding described in the present invention: the current transmitter converts the original wind speed signal into two 4-20mA current signals with equal values, one of which is transmitted to the main control cabinet, and the other is transmitted to the data storage unit.

[0013] In a preferred embodiment of the wind turbine performance verification system based on wind speed data forwarding described in the present invention: the data storage unit is a remote real-time database, and the remote real-time database is connected to the signal forwarding module by wired or wireless means to receive and store the original wind speed signal transmitted by the signal forwarding module.

[0014] In a preferred embodiment of the wind turbine performance verification system based on wind speed data forwarding of the present invention: the signal input end of the signal forwarding module is preferentially connected to the signal output end of the standby anemometer to receive the original wind speed signal output by the standby anemometer.

[0015] In a preferred embodiment of the wind turbine performance verification method based on wind speed data forwarding of the present invention: an original wind speed signal output by the anemometer is obtained by a signal forwarding module provided between the anemometer and the main control cabinet;

[0016] The signal forwarding module processes the original wind speed signal to obtain two signals with the same value as the original wind speed signal;

[0017] The processed signal of one channel is transmitted to a remote database for storage, and the processed signal of the other channel is transmitted to the main control cabinet;

[0018] The wind turbine performance is verified and analyzed based on the original wind speed signal stored in the remote database and the SCADA display data fed back by the main control cabinet.

[0019] In a preferred embodiment of the wind turbine performance verification method based on wind speed data forwarding described in the present invention: signal processing includes performing overcurrent protection processing on the original wind speed signal through a surge protector, and then performing signal conversion on the protected signal through a current transmitter.

[0020] In a preferred embodiment of the wind turbine performance verification method based on wind speed data forwarding described in the present invention: verifying and analyzing the wind turbine performance includes: comparing the power data corresponding to the original wind speed signal stored in the remote database with the SCADA displayed power data to obtain the wind turbine real power curve.

[0021] In a preferred embodiment of the wind turbine performance verification method based on wind speed data forwarding of the present invention: verifying and analyzing the wind turbine performance also includes: inferring the wind speed "transfer function" of the wind turbine manufacturer based on the difference between the original wind speed signal and the SCADA displayed wind speed signal.

[0022] In a preferred embodiment of the wind turbine performance verification method based on wind speed data forwarding described in the present invention: when verifying the effect of the wind turbine after performance improvement modification, the wind turbine power curves obtained based on the original wind speed signal before and after the modification are compared to determine whether the modification meets the standards.

[0023] The beneficial effect of the present invention is that there is no need to rely on an external laser radar to measure the power curve. The manufacturer's performance improvement transformation effect can be verified by simply comparing the power curves corresponding to the original wind speeds before and after the transformation collected by the signal forwarding module, saving the re-testing fee of more than 120,000 yuan per time, and significantly reducing the owner's cost investment in the wind turbine's entry and exit quality assurance and transformation verification stages.

[0024] For wind turbines whose power curves are shown as unqualified by SCADA, their true performance can be determined directly based on the original wind speed signal. Without the need for additional investment in lidar measurements, the manufacturer can be urged to make effective rectifications, preventing the manufacturer from covering up wind turbine performance defects by adjusting the "transfer function", thereby improving the timeliness and accuracy of quality control.

[0025] By comparing the original wind speed signal with the wind speed displayed by SCADA, the manufacturer's confidential "transfer function" can be inferred, which helps owners identify unreasonable wind speed adjustment methods. For models with abnormal "transfer functions", the manufacturer can be promptly contacted for correction, thus ensuring the owner's right to know and control the true performance of the wind turbine.

[0026] The signal forwarding module achieves signal replication and forwarding through a surge protector and a 1-input, 2-output current transmitter, ensuring both the accurate collection of the original wind speed signal and the normal transmission of another signal to the main control cabinet without interfering with the original control logic and operating status of the wind turbine, and having high safety and reliability.

[0027] For wind turbines equipped with two sets of anemometers, a backup anemometer can be connected to achieve the same verification effect without affecting the operation of the main anemometer. It is suitable for the installation requirements of different wind turbine models and has wide practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Among them:

[0029] Figure 1 The framework diagram of the wind turbine performance verification system based on wind speed data forwarding is shown;

[0030] Figure 2 A flow chart of a wind turbine performance verification method based on wind speed data forwarding is shown. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0032] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0033] Reference Figure 1 This embodiment provides a wind turbine performance verification system based on wind speed data forwarding, including installing a signal forwarding module to obtain the original wind speed signal, which can save actual measurement costs, verify the modification effect of wind turbines with unqualified power curves, and reversely deduce the manufacturer's confidential "transfer function", which has significant practicality and economy.

[0034] A signal forwarding module is set between the anemometer of the fan and the main control cabinet, so that the signal forwarding module is connected in series in the signal transmission path between the anemometer and the main control cabinet;

[0035] The original wind speed signal output by the anemometer is transmitted to the signal forwarding module;

[0036] The signal forwarding module transmits the original wind speed signal in two paths, one of which is transmitted to the main control cabinet along the original path, and the other is transmitted to the data storage unit;

[0037] The data storage unit stores the received original wind speed signal and compares the stored original wind speed signal with the wind speed signal and power signal displayed in the SCADA system.

[0038] As an optional embodiment, the signal forwarding module includes a surge protector and a current transmitter connected in sequence. The original wind speed signal is first transmitted to the surge protector, and then transmitted to the current transmitter after being processed by the surge protector. The current transmitter converts the original wind speed signal into at least two signals.

[0039] The current transmitter converts the original wind speed signal into two 4-20mA current signals with equal values, one of which is transmitted to the main control cabinet, and the other is transmitted to the data storage unit.

[0040] The data storage unit is a remote real-time database, which is connected to the signal forwarding module via a wired or wireless method, and receives and stores the original wind speed signal transmitted by the signal forwarding module.

[0041] The signal input end of the signal forwarding module is preferentially connected to the signal output end of the standby anemometer to receive the original wind speed signal output by the standby anemometer.

[0042] The raw wind speed signal generated by the anemometer first passes through a surge protector to prevent damage to the equipment from extreme events such as overcurrent. The protected raw wind speed signal then enters a current transmitter, which converts the raw 4-20mA wind speed current signal into two equal 4-20mA signals. One signal is sent to a 4G data logger and then transferred to a remote real-time database for storage and subsequent analysis. The other signal is transmitted to the main control cabinet in the nacelle to ensure that the original operation of the wind turbine is not affected.

[0043] By comparing the stored original wind speed signal with the wind speed signal processed by the "transfer function" displayed by SCADA, it is possible to evaluate the wind turbine's true power curve, verify the manufacturer's modification effect, and reversely infer the "transfer function".

[0044] Reference Figure 2,A wind turbine performance verification method based on wind speed data forwarding, comprising,obtaining the original wind speed signal output by the anemometer through a signal forwarding module provided between the anemometer and the main control cabinet;

[0045] The signal forwarding module processes the original wind speed signal to obtain two signals with the same value as the original wind speed signal;

[0046] One of the processed signals is transmitted to a remote database for storage, and the other processed signal is transmitted to the main control cabinet;

[0047] The wind turbine performance is verified and analyzed based on the original wind speed signal stored in the remote database and the SCADA display data fed back by the main control cabinet.

[0048] In one embodiment provided in the present application, the signal processing includes performing overcurrent protection processing on the original wind speed signal through a surge protector, and then performing signal conversion on the protected signal through a current transmitter.

[0049] Verification and analysis of wind turbine performance includes: comparing the power data corresponding to the original wind speed signal stored in the remote database with the power data displayed by SCADA to obtain the actual power curve of the wind turbine.

[0050] Verification and analysis of wind turbine performance also includes: deducing the wind turbine manufacturer's wind speed "transfer function" based on the difference between the original wind speed signal and the wind speed signal displayed by SCADA.

[0051] When verifying the effect of a wind turbine after performance improvement modification, compare the wind turbine power curves obtained based on the original wind speed signal before and after the modification to determine whether the modification meets the requirements.

[0052] The signal forwarding module, installed between the anemometer and the main control cabinet, obtains the original wind speed signal output by the anemometer. The signal forwarding module processes the original wind speed signal, first passing it through a surge protector for overcurrent protection, and then converting the original 4-20mA wind speed signal into two equal 4-20mA signals through a current transmitter. One of the processed signals is transmitted to a 4G data collector and then sent to a remote real-time database for storage, while the other processed signal is transmitted to the main control cabinet to ensure that the original operation of the wind turbine is not affected. Based on the original wind speed signal stored in the remote database and the SCADA display data fed back by the main control cabinet, the wind turbine performance is verified and analyzed. The power data corresponding to the original wind speed signal is compared with the power data displayed on the SCADA screen to obtain the wind turbine's actual power curve. The difference between the original wind speed signal and the SCADA display wind speed signal is used to infer the wind turbine manufacturer's wind speed "transfer function". When verifying the effect of the wind turbine after performance improvement, the wind turbine power curves obtained based on the original wind speed signal before and after the modification are compared to determine whether the modification meets the requirements.

[0053] In some implementations, a wind turbine in a wind farm is about to expire and needs to be verified to see if its actual power curve meets the contract requirements. Traditionally, this would cost 120,000 yuan to rent a LiDAR to measure the incoming wind speed. However, using this patented solution:

[0054] A signal forwarding module is installed between the wind turbine anemometer and the main control cabinet to obtain the original wind speed signal and store it in a remote database; the actual power curve corresponding to the original wind speed signal is compared with the "optimized" power curve displayed by SCADA; if the difference does not meet the standard, the manufacturer is directly asked to make corrections without paying additional lidar measurement fees, saving more than 120,000 yuan in costs per time.

[0055] Verification of the transformation effect of fans with unqualified power curves during the warranty period

[0056] The SCADA system for several wind turbines at a certain wind farm indicated that the power curve compliance was lower than the 95% (K value) specified in the contract. The manufacturer claimed that performance could be improved through modification:

[0057] Before the transformation, a signal forwarding module was installed to record the original wind speed signal and the corresponding power data;

[0058] After the manufacturer completes the performance improvement transformation, it continues to collect the original wind speed signal through the module;

[0059] Compare the power curves based on the original wind speed before and after the transformation. If there is no obvious improvement in the curve, it can be directly proved that the manufacturer did not actually improve the performance of the wind turbine (only adjusted the "transfer function"), and urge them to make corrections.

[0060] Fan Manufacturer "Transfer Function" Reasonableness Verification Scenario

[0061] A wind farm discovered that the wind speed displayed by the SCADA system for some wind turbines was consistently more than 1.5 m / s lower than the data from surrounding weather stations. They suspected an anomaly in the manufacturer's "transfer function":

[0062] Install a signal forwarding module on the target wind turbine to synchronously collect the original wind speed signal and the wind speed displayed by SCADA;

[0063] Through long-term data comparison, the manufacturer's "transfer function" is deduced, for example, "original wind speed - 1.5m / s = displayed wind speed";

[0064] If the function deviates significantly from the principles of aerodynamics, for example, if the correction value far exceeds the reasonable range in the industry, the manufacturer can be interviewed based on the original data and asked to adjust it to a reasonable "transfer function".

[0065] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A wind turbine performance verification system based on wind speed data forwarding, characterized by: include, A signal forwarding module is provided between the anemometer of the wind turbine and the main control cabinet, so that the signal forwarding module is connected in series in the signal transmission path between the anemometer and the main control cabinet; The original wind speed signal output by the anemometer is transmitted to the signal forwarding module; The signal forwarding module transmits the original wind speed signal in two paths, one of which is transmitted to the main control cabinet along the original path, and the other is transmitted to the data storage unit; The data storage unit stores the received original wind speed signal and compares the stored original wind speed signal with the wind speed signal and the power signal displayed in the SCADA system.

2. The wind turbine performance verification system based on wind speed data forwarding according to claim 1 is characterized in that: The signal forwarding module includes a surge protector and a current transmitter connected in sequence. The original wind speed signal is first transmitted to the surge protector, processed by the surge protector, and then transmitted to the current transmitter. The current transmitter converts the original wind speed signal into at least two signals.

3. The wind turbine performance verification system based on wind speed data forwarding according to claim 2 is characterized in that: The current transmitter converts the original wind speed signal into two 4-20mA current signals with equal values, wherein one 4-20mA current signal is transmitted to the main control cabinet, and the other 4-20mA current signal is transmitted to the data storage unit.

4. The wind turbine performance verification system based on wind speed data forwarding according to claim 3 is characterized in that: The data storage unit is a remote real-time database, which is connected to the signal forwarding module via a wired or wireless manner and receives and stores the original wind speed signal transmitted by the signal forwarding module.

5. The wind turbine performance verification system based on wind speed data forwarding according to claim 4 is characterized in that: The signal input end of the signal forwarding module is preferentially connected to the signal output end of the standby anemometer to receive the original wind speed signal output by the standby anemometer.

6. A wind turbine performance verification method based on wind speed data forwarding, based on the wind turbine performance verification system based on wind speed data forwarding according to any one of claims 1 to 5, characterized in that: include, The original wind speed signal output by the anemometer is obtained through a signal forwarding module arranged between the anemometer and the main control cabinet; The signal forwarding module processes the original wind speed signal to obtain two signals with the same value as the original wind speed signal; The processed signal of one channel is transmitted to a remote database for storage, and the processed signal of the other channel is transmitted to the main control cabinet; The wind turbine performance is verified and analyzed based on the original wind speed signal stored in the remote database and the SCADA display data fed back by the main control cabinet.

7. The wind turbine performance verification method based on wind speed data forwarding according to claim 6 is characterized in that: Signal processing includes performing overcurrent protection processing on the original wind speed signal through a surge protector, and then performing signal conversion on the protected signal through a current transmitter.

8. The wind turbine performance verification method based on wind speed data forwarding according to claim 7 is characterized in that: Verification analysis of wind turbine performance includes: The power data corresponding to the original wind speed signal stored in the remote database is compared with the power data displayed by the SCADA to obtain the real power curve of the wind turbine.

9. The wind turbine performance verification method based on wind speed data forwarding according to claim 8, characterized in that: Verification and analysis of wind turbine performance also includes: Based on the difference between the original wind speed signal and the SCADA displayed wind speed signal, the wind speed "transfer function" of the wind turbine manufacturer is deduced.

10. The wind turbine performance verification method based on wind speed data forwarding according to claim 9, characterized in that: When verifying the effect of the wind turbine after the performance improvement modification, the wind turbine power curves obtained based on the original wind speed signal before and after the modification are compared to determine whether the modification meets the requirements.

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