Energy storage based drilling and workover hybrid system and control method thereof
The energy storage-based hybrid power system for drilling and well workover solves the problem of insufficient grid capacity during drilling and well workover operations, achieves efficient energy storage and distribution, rapid response and precise control, reduces power operation costs, supports sudden load changes, and enables uninterrupted power supply and intelligent management of critical loads.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BOMAY ELECTRIC IND CO LTD
- Filing Date
- 2024-11-29
- Publication Date
- 2026-06-02
AI Technical Summary
The power grid capacity in the drilling and well workover area is insufficient, expansion costs are high, the standby capacity of the generating units is large, the power quality is poor, the level of intelligence is low, and the transient response is slow.
The system employs a hybrid power system for drilling and well workover based on energy storage, which includes a power grid, an energy storage transformer system, a generator set, an energy storage management system, and loads. The energy storage management system controls the operating status of the generator set and transformer system to achieve efficient storage and distribution of electrical energy, and combines it with a smart energy management system for power dispatching.
It achieves efficient utilization of grid capacity, rapid response and precise control, ensures stable power quality, reduces power operation costs, supports sudden load changes, enables uninterrupted power supply to critical loads, and realizes intelligent management of hybrid power systems.
Smart Images
Figure CN122136988A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of oil drilling equipment technology, specifically relating to a hybrid drilling and workover system based on energy storage, and also to a control method for such a system. Background Technology
[0002] In some areas where drilling and workover operations are conducted, the oilfield power grid capacity is small, and expansion costs are high. Generator sets are often used for these operations, but these sets frequently operate inefficiently during operations, exhibiting slow transient response, poor power quality, and high power costs. Furthermore, due to the large sudden loads during drilling and workover operations, generator sets require large standby capacities, resulting in high configuration costs and low levels of automation. Therefore, adjustments to the power supply are urgently needed. Summary of the Invention
[0003] The first objective of this invention is to provide a hybrid power system for drilling and well repair based on energy storage, which makes full use of the existing capacity of the oilfield power grid, and is equipped with a hybrid power system and a smart energy management system to solve the problems of insufficient capacity of the existing power grid in the oilfield, difficulty in expanding capacity, large standby capacity of the units, high operating costs, poor power quality and low level of intelligence.
[0004] To achieve the above objectives, the technical solution adopted by this invention is: a drilling and workover hybrid power system based on energy storage, comprising a power grid, a first energy storage transformer system, a first generator set, a second energy storage transformer system, an energy storage management system, a frequency converter load, and a stable load; the first energy storage transformer system is connected to the power grid to convert and store excess current in the power grid in the energy storage management system; the second energy storage transformer system is connected to the energy storage management system to convert and transmit the electrical energy stored in the energy storage management system to the frequency converter load and the stable load; the frequency converter load and the stable load are respectively connected to the first generator set and the second energy storage transformer system, and are powered by the first generator set and the second energy storage transformer system; the energy storage management system controls the operating status of the first energy storage transformer system, the second energy storage transformer system, and the first generator set.
[0005] As a preferred technical solution of the present invention, it further includes a second generator set, which is connected to the variable frequency load and the stable load to supply power to the variable frequency load and the stable load.
[0006] As a preferred technical solution of the present invention, the energy storage management system controls the working status of the first generator set and the second generator set through wireless communication.
[0007] As a preferred technical solution of the present invention, the power grid is an existing small-capacity power grid in the oil field.
[0008] As a preferred technical solution of the present invention, both the first energy storage transformer system and the second energy storage transformer system are composed of an energy storage converter, a control circuit and a transformer connected in sequence.
[0009] As a preferred technical solution of the present invention, the frequency conversion load is composed of one or more frequency conversion loads.
[0010] As a preferred embodiment of the present invention, the stable load is a combination of one or more stable loads.
[0011] The second objective of this invention is to provide a control method for a drilling and well workover hybrid power system based on energy storage, which makes full use of the existing capacity of the oilfield power grid, configures a hybrid power system and a smart energy management system, and solves the problems of insufficient capacity of the existing oilfield power grid, difficulty in expansion, large standby capacity of the units, high operating costs, poor power quality and low level of intelligence.
[0012] To achieve the above objectives, the technical solution adopted by this invention is: a control method for a drilling and well workover hybrid power system based on energy storage, characterized in that it includes: When P 载 ≥P 网 If SOC ≤ 5%, one or two generator sets will be automatically connected to the grid, depending on the load size, and the energy storage will automatically charge with the load. If 95% ≥ SOC > 5%, and the load is small, there is no need to start the generator sets; the energy storage will automatically discharge with the load. When the load is large, one or two generator sets will be automatically connected to the grid, and the energy storage will automatically charge and discharge with the load. If SOC > 95%, the energy storage will automatically discharge. When the load is large, one or two generator sets will be automatically connected to the grid, and the energy storage will automatically discharge with the load. When P 载 <P 网 When SOC ≤ 95%, the energy storage device charges; when SOC > 95%, the energy storage device is in standby mode and charging is disabled. Where: P 载 P is the electrical energy required by the load. 网 The SOC is the electrical energy stored by the energy storage management system, which is the electrical energy that the power grid can provide.
[0013] The beneficial effects of this invention are: (1) The energy storage-based drilling and well repair hybrid power system of the present invention makes full use of the existing power grid capacity and realizes a high degree of integration and matching between energy storage, power grid and generator set.
[0014] (2) The energy storage-based hybrid power system for drilling and well repair of the present invention realizes rapid switching, response and precise control between hybrid power for drilling and well repair operations, stabilizes power quality and effectively supports sudden load changes.
[0015] (3) The energy storage-based drilling and repair hybrid power system of the present invention enables energy storage and seamless switching off the grid when the power grid and generator set are out of service without planning, so as to achieve uninterrupted emergency power supply for critical loads.
[0016] (4) The energy storage-based drilling and well repair hybrid power system of the present invention realizes optimal energy scheduling management and control of hybrid power, and reduces the cost of power operation.
[0017] (5) The energy storage-based drilling and workover hybrid power system of the present invention realizes the recovery and utilization of drilling and workover potential energy during tripping and running.
[0018] (6) The energy storage-based hybrid power system for drilling and well repair of the present invention realizes hybrid power data acquisition, network monitoring, energy scheduling and network data analysis through an energy management system, and realizes remote automatic start and stop of small power generator sets. Through real-time management of all loads, optimal energy scheduling management and control are achieved.
[0019] (7) A control method for a drilling and workover hybrid power system based on energy storage according to the present invention adopts whole-wellfield intelligent energy management technology and integrated energy storage load support and transfer technology to realize intelligent control of hybrid power. Intelligent control is based on energy storage SOC and load changes, with the grid output capacity P... 网 To control the boundary point, load P is detected and collected in real time. 载 . Attached Figure Description
[0020] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of a drilling and well workover hybrid power system based on energy storage according to the present invention. Figure 2 This is a schematic diagram of a control method for a hybrid drilling and well repair system based on energy storage, according to the present invention.
[0021] In the diagram, 1. Power grid, 2. First energy storage transformer system, 3. Energy storage management system, 4. Second energy storage transformer system, 5. Variable frequency load, 6. Stable load, 7. First generator set, 8. Second generator set. Detailed Implementation
[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0023] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.
[0024] Example 1 like Figure 1 As shown, a drilling and well workover hybrid power system based on energy storage according to the present invention includes a power grid 1, a first energy storage transformer system 2, a first generator set 7, a second energy storage transformer system 4, an energy storage management system 3, a frequency converter load 5, and a stable load 6. The first energy storage transformer system 2 is connected to the power grid 1 to convert and store excess current in the power grid 1 in the energy storage management system 3. The second energy storage transformer system 4 is connected to the energy storage management system 3 to convert and transmit the electrical energy stored in the energy storage management system 3 to the frequency converter load 5 and the stable load 6. The frequency converter load 5 and the stable load 6 are respectively connected to the first generator set 7 and the second energy storage transformer system 4, and are powered by the first generator set 7 and the second energy storage transformer system 4. The energy storage management system 3 controls the working status of the first energy storage transformer system 2, the second energy storage transformer system 4, and the first generator set 7.
[0025] When in operation, the first generator set 7 can directly supply power to the frequency conversion load 5 and the stable load 6. On the other hand, the first energy storage transformer system 2 will convert and store the electrical energy in the power grid 1 in the energy storage management system 3, and then the second energy storage transformer system 2 will convert the electrical energy stored in the energy storage management system 3 and send it out with a certain current and voltage to supply power to the frequency conversion load 5 and the stable load 6.
[0026] like Figure 2 As shown, the control method of a drilling and workover hybrid power system based on energy storage according to the present invention specifically includes: When P 载 ≥P 网 If SOC ≤ 5%, the first generator set 7 will automatically connect to the grid according to the load size, and the energy storage will automatically charge following the load. If 95% ≥ SOC > 5%, and the load is small, there is no need to start the generator set, and the energy storage will automatically discharge following the load. When the load is large, the first generator set 7 will automatically connect to the grid, and the energy storage will automatically charge and discharge following the load. If SOC > 95%, the energy storage will automatically discharge. When the load is large, the first generator set 7 will automatically connect to the grid, and the energy storage will automatically discharge following the load. When P 载 <P 网 When SOC ≤ 95%, the energy storage device charges; when SOC > 95%, the energy storage device is in standby mode and charging is disabled. Where: P 载 P is the electrical energy required by the load. 网 The SOC is the electrical energy stored by the energy storage management system, which is the electrical energy that the power grid can provide.
[0027] Example 2 like Figure 1As shown, the present invention discloses a drilling and workover hybrid power system based on energy storage, comprising a power grid 1, a first energy storage transformer system 2, a first generator set 7, a second generator set 8, a second energy storage transformer system 4, an energy storage management system 3, a frequency converter load 5, and a stable load 6. The first energy storage transformer system 2 is connected to the power grid 1 to convert and store excess current in the power grid 1 in the energy storage management system 3. The second energy storage transformer system 4 is connected to the energy storage management system 3 to convert and transmit the electrical energy stored in the energy storage management system 3 to the frequency converter load 5 and the stable load 6. The frequency converter load 5 and the stable load 6 are respectively connected to the first generator set 7, the second generator set 8, and the second energy storage transformer system 4, and are powered by the first generator set 7, the second generator set 8, and the second energy storage transformer system 4. The energy storage management system 3 controls the operating status of the first energy storage transformer system 2, the second energy storage transformer system 4, the first generator set 7, and the second generator set 8.
[0028] When in operation, on the one hand, the first generator set 7 and the second generator set 8 can directly supply power to the frequency conversion load 5 and the stable load 6; on the other hand, the first energy storage transformer system 2 will convert and store the electrical energy in the power grid 1 in the energy storage management system 3, and then the second energy storage transformer system 2 will convert the electrical energy stored in the energy storage management system 3 and send it out with a certain current and voltage to supply power to the frequency conversion load 5 and the stable load 6.
[0029] like Figure 2 As shown, the control method of a drilling and workover hybrid power system based on energy storage according to the present invention specifically includes: When P 载 ≥P 网 If SOC ≤ 5%, one or two generator sets will be automatically connected to the grid, depending on the load size, and the energy storage will automatically charge with the load. If 95% ≥ SOC > 5%, and the load is small, there is no need to start the generator sets; the energy storage will automatically discharge with the load. When the load is large, one or two generator sets will be automatically connected to the grid, and the energy storage will automatically charge and discharge with the load. If SOC > 95%, the energy storage will automatically discharge. When the load is large, one or two generator sets will be automatically connected to the grid, and the energy storage will automatically discharge with the load. When P 载 <P 网 When SOC ≤ 95%, the energy storage device charges; when SOC > 95%, the energy storage device is in standby mode and charging is disabled. Where: P 载 P is the electrical energy required by the load. 网 The SOC is the electrical energy stored by the energy storage management system, which is the electrical energy that the power grid can provide.
[0030] Example 3 like Figure 1As shown in Example 2, in Example 3, the present invention provides a drilling and well workover hybrid power system based on energy storage, comprising a power grid 1, a first energy storage transformer system 2, a first generator set 7, a second generator set 8, a second energy storage transformer system 4, an energy storage management system 3, a frequency converter load 5, and a stable load 6. The first energy storage transformer system 2 is connected to the power grid 1 to convert and store excess current in the power grid 1 in the energy storage management system 3. The second energy storage transformer system 4 is connected to the energy storage management system 3 to convert and transmit the electrical energy stored in the energy storage management system 3 to the frequency converter load 5 and the stable load 6. The frequency converter load 5 and the stable load 6 are respectively connected to the first generator set 7, the second generator set 8, and the second energy storage transformer system 4, and are powered by the first generator set 7, the second generator set 8, and the second energy storage transformer system 4. The energy storage management system 3 controls the operating status of the first energy storage transformer system 2, the second energy storage transformer system 4, the first generator set 7, and the second generator set 8.
[0031] Unlike Embodiment 2, in Embodiment 3, the present invention provides a drilling and well repair hybrid power system based on energy storage, wherein the energy storage management system 3 controls the working status of the first generator set 7 and the second generator set 8 through wireless communication.
[0032] Example 4 like Figure 1 As shown in Example 3, in Example 4, the present invention provides a drilling and well workover hybrid power system based on energy storage, comprising a power grid 1, a first energy storage transformer system 2, a first generator set 7, a second generator set 8, a second energy storage transformer system 4, an energy storage management system 3, a frequency converter load 5, and a stable load 6. The first energy storage transformer system 2 is connected to the power grid 1 to convert and store excess current in the power grid 1 in the energy storage management system 3. The second energy storage transformer system 4 is connected to the energy storage management system 3 to convert and transmit the electrical energy stored in the energy storage management system 3 to the frequency converter load 5 and the stable load 6. The frequency converter load 5 and the stable load 6 are respectively connected to the first generator set 7, the second generator set 8, and the second energy storage transformer system 4, and are powered by the first generator set 7, the second generator set 8, and the second energy storage transformer system 4. The energy storage management system 3 controls the operating status of the first energy storage transformer system 2, the second energy storage transformer system 4, the first generator set 7, and the second generator set 8. The energy storage management system 3 controls the operating status of the first generator set 7 and the second generator set 8 through wireless communication.
[0033] Unlike Example 3, in Example 4, the present invention provides a hybrid drilling and workover system based on energy storage, where grid 1 is an existing small-capacity grid in the oilfield.
[0034] Example 5 like Figure 1As shown in Example 4, in Example 5, the present invention provides a drilling and well workover hybrid power system based on energy storage, comprising a power grid 1, a first energy storage transformer system 2, a first generator set 7, a second generator set 8, a second energy storage transformer system 4, an energy storage management system 3, a frequency converter load 5, and a stable load 6; the first energy storage transformer system 2 is connected to the power grid 1 to convert and store excess current in the power grid 1 in the energy storage management system 3; the second energy storage transformer system 4 is connected to the energy storage management system 3 to convert and transmit the electrical energy stored in the energy storage management system 3. The variable frequency load 5 and the stable load 6 are connected to the first generator set 7, the second generator set 8, and the second energy storage transformer system 4, respectively, and are powered by the first generator set 7, the second generator set 8, and the second energy storage transformer system 4. The energy storage management system 3 controls the working status of the first energy storage transformer system 2, the second energy storage transformer system 4, the first generator set 7, and the second generator set 8. The energy storage management system 3 controls the working status of the first generator set 7 and the second generator set 8 through wireless communication. The power grid 1 is the existing small-capacity power grid in the oil field.
[0035] Unlike Embodiment 4, in Embodiment 5, the first energy storage transformer system 2 and the second energy storage transformer system 4 of the present invention are both composed of an energy storage converter, a control circuit and a transformer connected in sequence.
[0036] Example 6 like Figure 1 As shown in Example 5, in Example 6, the present invention provides a drilling and workover hybrid power system based on energy storage, including a power grid 1, a first energy storage transformer system 2, a first generator set 7, a second generator set 8, a second energy storage transformer system 4, an energy storage management system 3, a frequency converter load 5, and a stable load 6. The first energy storage transformer system 2 is connected to the power grid 1 to convert and store excess current in the power grid 1 in the energy storage management system 3. The second energy storage transformer system 4 is connected to the energy storage management system 3 to convert and transmit the electrical energy stored in the energy storage management system 3 to the frequency converter load 5 and the stable load 6. Load 6 is connected to the first generator set 7, the second generator set 8, and the second energy storage transformer system 4, respectively, and is powered by the first generator set 7, the second generator set 8, and the second energy storage transformer system 4; the energy storage management system 3 controls the working status of the first energy storage transformer system 2, the second energy storage transformer system 4, the first generator set 7, and the second generator set 8; the energy storage management system 3 controls the working status of the first generator set 7 and the second generator set 8 through wireless communication; the power grid 1 is the existing small-capacity power grid in the oil field, and the first energy storage transformer system 2 and the second energy storage transformer system 4 are both composed of energy storage converters, control circuits, and transformers connected in sequence.
[0037] Unlike Example 5, in Example 6, the present invention provides a drilling and well repair hybrid power system based on energy storage, wherein the variable frequency load 5 is composed of one or more variable frequency loads, and the stable load 7 is composed of one or more stable loads.
[0038] The foregoing description illustrates and describes several preferred embodiments of the invention. However, as previously stated, it should be understood that the invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the invention should be within the protection scope of the appended claims.
Claims
1. A hybrid drilling and workover system based on energy storage, characterized in that, The system includes a power grid (1), a first energy storage transformer system (2), a first generator set (7), a second energy storage transformer system (4), an energy storage management system (3), a frequency converter load (5), and a stable load (6). The first energy storage transformer system (2) is connected to the power grid (1) to convert excess current in the power grid (1) and store it in the energy storage management system (3). The second energy storage transformer system (4) is connected to the energy storage management system (3) to convert the electrical energy stored in the energy storage management system (3) and transmit it to the frequency converter load (5) and the stable load (6). The frequency converter load (5) and the stable load (6) are connected to the first generator set (7) and the second energy storage transformer system (4) respectively, and are powered by the first generator set (7) and the second energy storage transformer system (4). The energy storage management system (3) controls the working status of the first energy storage transformer system (2), the second energy storage transformer system (4), and the first generator set (7).
2. The energy storage-based drilling and workover hybrid power system according to claim 1, characterized in that, It also includes a second generator set (8), which is connected to the variable frequency load (5) and the stable load (6) to supply power to the variable frequency load (5) and the stable load (6).
3. The energy storage-based drilling and workover hybrid power system according to claim 2, characterized in that, The energy storage management system (3) controls the working status of the first generator set (7) and the second generator set (8) through wireless communication.
4. The energy storage-based drilling and workover hybrid power system according to claim 3, characterized in that, The power grid (1) is the existing small-capacity power grid in the oil field.
5. The energy storage-based drilling and workover hybrid power system according to claim 4, characterized in that, The first energy storage transformer system (2) and the second energy storage transformer system (4) are both composed of an energy storage converter, a control circuit and a transformer connected in sequence.
6. The energy storage-based drilling and workover hybrid power system according to claim 5, characterized in that, The variable frequency load (5) is composed of one or more variable frequency loads.
7. The energy storage-based drilling and workover hybrid power system according to claim 6, characterized in that, The stable load (7) is a combination of one or more stable loads.
8. A control method for a drilling and well workover hybrid power system based on energy storage, characterized in that, include: When P 载 ≥P 网 If SOC ≤ 5%, one or two generator sets will be automatically connected to the grid, depending on the load size, and the energy storage will automatically charge with the load. If 95% ≥ SOC > 5%, and the load is small, there is no need to start the generator sets; the energy storage will automatically discharge with the load. When the load is large, one or two generator sets will be automatically connected to the grid, and the energy storage will automatically charge and discharge with the load. If SOC > 95%, the energy storage will automatically discharge. When the load is large, one or two generator sets will be automatically connected to the grid, and the energy storage will automatically discharge with the load. When P 载 <P 网 When SOC ≤ 95%, the energy storage device charges; when SOC > 95%, the energy storage device is in standby mode and charging is disabled. Where: P 载 P is the electrical energy required by the load. 网 The SOC is the electrical energy stored by the energy storage management system, which is the electrical energy that the power grid can provide.