Offshore platform power grid wind storage combined system
By combining the weighted moving average filtering algorithm with energy storage devices in the offshore platform power grid, the problem of unstable wind power output is solved, and the stable supply and economic operation of the power grid are achieved.
Patent Information
- Application Number
- CN202510876291.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-27
- Publication Date
- 2025-09-30
AI Technical Summary
The unstable output power of wind power generation on offshore oil platforms leads to discontinuous energy supply, affecting the normal operation of production equipment. Existing technologies are unable to effectively balance power fluctuations.
The weighted moving average filtering algorithm is used to calculate the filtering coefficient α, and the wind turbine output power is monitored in real time through the wind turbine computer monitoring unit. Combined with the energy storage device, power smoothing and optimized scheduling are achieved to ensure stable power supply to the power grid.
It has achieved stable operation of the offshore platform power grid, ensured 24-hour uninterrupted power supply, and reduced economic losses caused by power outages.
Smart Images
Figure CN120728636A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of offshore oil and gas field platform power grids, and in particular relates to an offshore platform power grid wind and storage combined system. Background Art
[0002] Offshore oil platforms typically rely on fossil fuels for power generation, which is costly and has negative environmental impacts. Due to the abundance of offshore wind energy resources, offshore oil platform power grids have been gradually integrating wind power generation in recent years. However, wind power output is affected by wind speed and is intermittent and unstable.
[0003] Offshore oil platforms are often located far from land, making their energy supply relatively independent. While onshore power grids can balance power fluctuations through multiple transmission lines and power points, offshore platforms must rely on their own energy systems to manage fluctuations. Furthermore, production equipment on offshore oil platforms typically needs to operate 24 / 7. Any interruption in power supply could disrupt production, resulting in significant economic losses.
[0004] Therefore, the need for optimizing the power of offshore platform grids by integrating wind power into them is even more pressing. By building a combined wind and energy storage system, offshore oil platforms can optimize their energy mix. Energy storage devices in these systems can store excess energy during high wind speeds and release it during low wind speeds, thereby smoothing out fluctuations in wind power generation. This requires intelligent control strategies for real-time power monitoring and optimized scheduling. Summary of the Invention
[0005] The purpose of the present invention is to provide a wind power storage system for offshore platforms. To solve the above technical problems, the present invention adopts the following technical solutions: An offshore platform power grid wind energy storage combined system, characterized by comprising the following steps: S1. Collect the real-time active power output of the wind turbine through the wind turbine computer monitoring unit (t); S2. Determine the maximum fluctuation limits P1min and P10min of the active power output of the wind turbine generator set within 1 minute and 10 minutes; S3, calculate the filter coefficient α; S4. Calculate the output power of the offshore platform power grid wind storage system that meets the fluctuation limit requirements (t).
[0006] Furthermore, the maximum fluctuation limit of the active power output of the wind turbine generator set S2 within 1 minute and 10 minutes is 、 Mainly determined by the installed capacity of wind turbines; The instantaneous power fluctuation limit and the ultimate power fluctuation limit are used to describe the fluctuation limits of offshore wind farms within 1 minute and 10 minutes respectively. The mathematical expressions are as follows: - ≤ (t) - (t-1) ≤ , max (ε) - min (ε) ≤ , ε = t, t + 1, …, t + 10 Where: , They are respectively the active power change limits within 1 minute and 10 minutes under the corresponding installed capacity; (t), (t-1) are respectively the time at time t and time t-1 ;max (ε), min (ε) are respectively The maximum and minimum values of .
[0007] Furthermore, the specific principle of calculating the filter coefficient α of S3 is to use a weighted moving average filtering algorithm to smooth the output power fluctuation of the offshore wind farm, set a variable time window, calculate the average value of the data in it, and obtain the smoothed value at the current moment by weighted summation with the data at the current moment, as shown in formula (1): (t) =α (t) + (1-α) (t-1), α∈ [0, 1] (1) Where: α is the filtering coefficient. The smaller α is, the more significant the filtering effect is. When α=1, there is no filtering effect. Initialize α to 0, and judge according to formula (1) (t) Whether the active power fluctuation limit requirements within 1 minute and 10 minutes are met. If not, increase the filter coefficient α+0.001 and recalculate until (t) Meet the active power fluctuation limit requirements within 1 minute and 10 minutes.
[0008] Furthermore, the output power of the offshore platform power grid wind storage combined system that meets the fluctuation limit requirements of S4 is (t) Once the filter coefficient α is determined, it can be determined by formula (1).
[0009] Furthermore, the output power of the wind-storage combined system that meets the fluctuation limit standard after filtering is used. (t) and the original wind turbine real-time output active power Pw(t), the charging and discharging power instructions of the energy storage device in the wind-storage combined system can be obtained (t): (t) = (t)- (t) when (t)>0, that is, Pw(t)> (t) The energy storage device is charged; when (t)<0, that is, Pw(t)< (t) when the energy storage device discharges; When (t)=0, the wind-storage combined system supplies power to the grid according to the wind turbine output power Pw(t).
[0010] Furthermore, the critical α value can be calculated to ensure that the active output power of the offshore wind farm after filtering meets the fluctuation limit standard. (t) is as small as possible to minimize the configuration capacity of the energy storage device in the wind-storage combined system and improve economic efficiency.
[0011] The offshore platform power grid wind energy storage combined system of the present invention has the following advantages: (1) The present invention is applicable to the analysis and research of safe and stable operation of offshore oilfield platform power grids containing wind power.
[0012] (2) The present invention is advanced and provides a response measure for offshore oil and gas field platform power grids to deal with disturbances to the isolated grid caused by unstable output power of wind turbines, thereby ensuring a continuous and reliable supply of electricity. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a flow chart of the offshore platform power grid wind storage combined system. DETAILED DESCRIPTION
[0014] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.
[0015] Those skilled in the art will appreciate that although some embodiments herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is intended to be within the scope of the present invention and to form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.
[0016] Please refer to the attached Figure 1 The offshore platform power grid wind storage combined system of the present invention is described.
[0017] As a preferred embodiment, Figure 1 As shown, the offshore platform power grid wind storage combined system of the present invention includes the following steps: S1. Collect the real-time active power output of the wind turbine through the wind turbine computer monitoring unit (t); S2. Determine the maximum fluctuation limit of the wind turbine generator set's output active power within 1 minute and 10 minutes 、 ; S3, calculate the filter coefficient α; S4. Calculate the output power of the offshore platform power grid wind storage system that meets the fluctuation limit requirements (t); Furthermore, the maximum fluctuation limit of the active power output of the wind turbine generator set S2 within 1 minute and 10 minutes is 、 It is mainly determined based on the installed capacity of wind turbines, see Table 1.
[0018] Table 1 Maximum limits of fluctuations in active power output of wind turbines within 1 minute and 10 minutes The instantaneous power fluctuation limit and the ultimate power fluctuation limit are used to describe the fluctuation limits of offshore wind farms within 1 minute and 10 minutes respectively. The mathematical expressions are as follows: - ≤ (t) - (t-1) ≤ , max (ε) - min (ε) ≤ , ε = t, t + 1, …, t + 10 Where: , They are respectively the active power change limits within 1 minute and 10 minutes under the corresponding installed capacity; (t), (t-1) are respectively the time at time t and time t-1 ;max (ε), min (ε) are respectively The maximum and minimum values of .
[0019] Furthermore, the specific principle of calculating the filter coefficient α of S3 is to use a weighted moving average filtering algorithm to smooth the output power fluctuation of the offshore wind farm, set a variable time window, calculate the average value of the data in it, and obtain the smoothed value at the current moment by weighted summation with the data at the current moment, as shown in formula (1); (t) =α (t) + (1-α) (t-1), α∈[0,1](1) Where: α is the filtering coefficient. The smaller α is, the more significant the filtering effect is. When α=1, there is no filtering effect.
[0020] Initialize α to 0, and judge according to formula (1) (t) Whether the active power fluctuation limit requirements within 1 minute and 10 minutes are met. If not, increase the filter coefficient α+0.001 and recalculate until (t) Meet the active power fluctuation limit requirements within 1 minute and 10 minutes.
[0021] Furthermore, the output power of the offshore platform power grid wind storage combined system that meets the fluctuation limit requirements of S4 is (t) Once the filter coefficient α is determined, it can be determined by formula (1).
[0022] Furthermore, the output power of the wind-storage combined system that meets the fluctuation limit standard after filtering is used. (t) and the original wind turbine real-time output active power (t), the charging and discharging power instructions of the energy storage device in the wind-storage combined system can be obtained (t).
[0023] (t) = (t)- (t) when (t)>0, that is, Pw(t)> (t) The energy storage device is charged; when (t)<0, that is (t)< (t) when the energy storage device discharges; When (t)=0, the wind-storage combined system supplies power to the grid according to the wind turbine output power Pw(t).
[0024] Furthermore, the critical α value can be calculated to ensure that the active output power of the offshore wind farm after filtering meets the fluctuation limit standard. (t) is as small as possible to minimize the configuration capacity of the energy storage device in the wind-storage combined system and improve economic efficiency.
[0025] The above embodiment represents only one embodiment of the present invention, but the embodiments of the present invention are not limited to the above embodiment. It should be noted that any other modifications, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention shall be considered equivalent replacement methods and fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent of this invention shall be based on the appended claims.
Claims
1. An offshore platform power grid wind storage combined system, characterized by: The main steps include: S1. Collect the real-time active power output of the wind turbine through the wind turbine computer monitoring unit (t); S2. Determine the maximum fluctuation limits P1min and P10min of the active power output of the wind turbine generator set within 1 minute and 10 minutes; S3, calculate the filter coefficient α; S4. Calculate the output power of the offshore platform power grid wind storage system that meets the fluctuation limit requirements (t).
2. The offshore platform power grid wind storage combined system according to claim 1, characterized in that: The maximum fluctuation limits P1min and P10min of the active power output of the wind turbine generator set S2 within 1 minute and 10 minutes are mainly determined according to the installed capacity of the wind turbine generator; The instantaneous power fluctuation limit and the ultimate power fluctuation limit are used to describe the fluctuation limits of offshore wind farms within 1 minute and 10 minutes respectively. The mathematical expressions are as follows: - ≤ (t) - (t-1) ≤ , max (e) - min (e) ≤ , ε = t, t + 1, …, t + 10 Where: , They are respectively the active power change limits within 1 minute and 10 minutes under the corresponding installed capacity; (t), (t-1) are respectively the time at time t and time t-1 ;max (ε), min (ε) are respectively The maximum and minimum values of .
3. The offshore platform power grid wind storage combined system according to claim 1, characterized in that: The specific principle of calculating the filter coefficient α of S3 is to use a weighted moving average filtering algorithm to smooth the output power fluctuation of the offshore wind farm, set a variable time window, calculate the average value of the data in it, and obtain the smoothed value at the current moment by weighted summation with the data at the current moment, as shown in formula (1): (t) =a (t) + (1-a) (t-1), α∈[0,1](1) Where: α is the filtering coefficient. The smaller α is, the more significant the filtering effect is. When α=1, there is no filtering effect. Initialize α to 0, and judge according to formula (1) (t) Whether the active power fluctuation limit requirements within 1 minute and 10 minutes are met. If not, increase the filter coefficient α+0.001 and recalculate until (t) Meet the active power fluctuation limit requirements within 1 minute and 10 minutes.
4. The offshore platform power grid wind storage combined system according to claim 1, characterized in that: The output power of the offshore platform power grid wind storage combined system that meets the fluctuation limit requirements of S4 (t) Once the filter coefficient α is determined, it can be determined by formula (1).
5. The offshore platform power grid wind storage combined system according to claim 1, characterized in that: Output power of wind-storage combined system meeting fluctuation limit standard after filtering (t) and the original wind turbine real-time output active power (t), the charging and discharging power instructions of the energy storage device in the wind-storage combined system can be obtained (t): (t) = (t)- (t) when (t)>0, that is, (t)> (t) The energy storage device is charged; when (t)<0, that is (t)< (t) when the energy storage device discharges; When (t)=0, the wind-storage combined system outputs power according to the wind turbine. (t) Supply power to the grid.
6. The offshore platform power grid wind storage combined system according to claim 1, characterized in that: Calculating the critical α value can ensure that the active output power of the offshore wind farm after filtering meets the fluctuation limit standard. (t) is as small as possible to minimize the configuration capacity of the energy storage device in the wind-storage combined system and improve economic efficiency.