Petroleum drilling micro-grid energy compensation system

Abstract

The utility model discloses a petroleum drilling micro-grid energy compensation system, which belongs to the technical field of petroleum drilling, and comprises an energy compensation controller, a flywheel energy storage device and a flywheel energy storage controller which are electrically connected with a micro-grid, and the micro-grid comprises a power supply device and a winch driving device which are electrically connected with a bus; the flywheel energy storage controller detects the state of the flywheel energy storage device and sends a state signal to the energy compensation controller, the bus, the power supply device and the winch driving device send the state signal to the energy compensation controller, and the energy compensation controller sends a control signal needing to be compensated or released to the flywheel energy storage controller. The flywheel energy storage controller controls the flywheel energy storage device to act, and the energy compensation controller controls the flywheel energy storage device to compensate the micro-grid and stabilize energy fluctuation according to energy changes in the drilling-up and drilling-down working conditions when the energy of the micro-grid fluctuates, so that the generator set efficiently performs flexible output, and meanwhile, effective recovery of potential energy can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil drilling, and in particular relates to an oil drilling microgrid energy compensation system. Background Art

[0002] Oil drilling microgrids are usually composed of diesel generator sets, whose output characteristics are not flexible enough. In order to cope with the load impact during drilling and drilling, a hot standby unit has to be added. However, the increase in capacity makes the entire system inefficient and seriously affects the service life of the diesel generator. Therefore, technicians need to design a power grid system that can break the limitation of traditional drilling platforms relying on dedicated generators to drive and fundamentally solve the efficiency and capacity redundancy problems of generators. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an energy compensation system for an oil drilling microgrid, which can reduce the configuration capacity of the generator set, improve the operating efficiency of the generator set, and effectively smooth the energy fluctuation of the oil drilling microgrid when drilling.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] An oil drilling microgrid energy compensation system includes an energy compensation controller electrically connected to the microgrid, a flywheel energy storage device and a flywheel energy storage controller, wherein the microgrid includes a power supply device and a winch drive device electrically connected to a busbar; the flywheel energy storage controller detects the state of the flywheel energy storage device and sends a state signal to the energy compensation controller, the busbar, the power supply device and the winch drive device send a state signal to the energy compensation controller, the energy compensation controller sends a control signal that needs to be compensated or released to the flywheel energy storage controller, and the flywheel energy storage controller controls the action of the flywheel energy storage device.

[0006] Furthermore, the bus includes an AC bus and a DC bus, and the energy compensation controller includes a frequency sampling circuit and a voltage sampling circuit, the frequency sampling circuit is connected to the AC bus, and the voltage sampling circuit is connected to the DC bus.

[0007] Furthermore, the power supply device includes a diesel generator set, the diesel generator set is electrically connected to a parallel controller, the diesel generator is electrically connected to the AC bus, and the energy compensation controller is electrically connected to the parallel controller for detecting the frequency and output power of the diesel generator set.

[0008] Furthermore, the winch driving device includes a winch electrically connected to the DC bus, and the energy compensation controller is electrically connected to the winch for detecting a state of the winch.

[0009] Furthermore, the flywheel energy storage device includes a flywheel and a flywheel converter electrically connected to the flywheel, and the flywheel converter is electrically connected to the DC bus.

[0010] Furthermore, the flywheel energy storage controller is electrically connected to the flywheel converter to detect the current power of the flywheel and the battery charge state and send them to the energy compensation controller.

[0011] Furthermore, a rectifier is electrically connected between the AC bus and the DC bus.

[0012] After adopting the above technical solution, the beneficial effects of the utility model are:

[0013] Since the oil drilling microgrid energy compensation system of the utility model includes an energy compensation controller electrically connected to the microgrid, a flywheel energy storage device and a flywheel energy storage controller, the microgrid includes a power supply device and a winch drive device electrically connected to the bus; the flywheel energy storage controller detects the state of the flywheel energy storage device and sends a state signal to the energy compensation controller, the bus, the power supply device and the winch drive device send the state signal to the energy compensation controller, the energy compensation controller sends the control signal that needs to be compensated or released to the flywheel energy storage controller, the flywheel energy storage controller controls the action of the flywheel energy storage device, and the energy compensation controller controls the flywheel energy storage device to compensate the microgrid according to the energy changes in the drilling and drilling conditions, when the energy of the microgrid fluctuates, so as to smooth the energy fluctuations, reduce the configuration capacity of the diesel generator set, and enable the generator set to output flexibly and efficiently; on the other hand, it can realize the effective recovery of potential energy, solve the energy problem, and help green drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model oil drilling microgrid energy compensation system;

[0015] In the figure, 1-diesel generator set, 2-parallel controller, 3-AC bus, 4-rectifier, 5-DC bus, 6-inverter, 7-winch, 8-flywheel converter, 9-flywheel, 10-flywheel energy storage controller, 11-energy compensation controller, 12-mud pump, 13-turntable. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the protection scope of the present invention.

[0017] In the description of this specification, unless otherwise clearly defined, words such as "setting", "installation", and "connection" should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above words in this utility model based on the specific content of the technical solution.

[0018] like Figure 1 As shown, the oil drilling microgrid energy compensation system includes an energy compensation controller 11 electrically connected to the microgrid, a flywheel energy storage device and a flywheel energy storage controller 10, and the microgrid includes a power supply device and a winch drive device electrically connected to the bus. The energy compensation controller 11 and the flywheel energy storage controller 10 and the microgrid, and the flywheel energy storage controller 10 and the flywheel energy storage device are specifically connected in communication, and the transmission of data information is realized through electrical signals. The dotted line in the figure shows the transmission of electrical signals.

[0019] The flywheel energy storage controller 10 detects the state of the flywheel energy storage device and sends a state signal to the energy compensation controller. The bus, power supply device and winch drive device send a state signal to the energy compensation controller 11. The energy compensation controller 11 calculates the active power that needs to be emitted or absorbed according to the state of the bus, power supply device, winch drive device and flywheel energy storage device. The energy compensation controller 11 sends the control signal that needs to be compensated or released to the flywheel energy storage controller 10. The flywheel energy storage controller 10 controls the operation of the flywheel energy storage device, charges and discharges the DC bus 5, and smoothes the load fluctuation of the power supply device.

[0020] like Figure 1 As shown, the bus includes an AC bus 3 and a DC bus 5, and the energy compensation controller 11 includes a frequency sampling circuit and a voltage sampling circuit. The frequency sampling circuit is connected to the AC bus 3 and is used to detect the frequency of the AC bus 3. The voltage sampling circuit is connected to the DC bus 5 and is used to detect the voltage of the DC bus 5.

[0021] Specifically, the power supply device includes a diesel generator set 1, the diesel generator is electrically connected to the AC bus 3, and a rectifier 4 is electrically connected between the AC bus 3 and the DC bus 5. The diesel generator set 1 generates AC power and supplies it to the 600V AC bus 3. After being rectified into DC power by the rectifier 4, it is transmitted to the 810V DC bus 5. The DC power on the DC bus 5 is converted into AC power by the inverter 6 and then supplied to the power equipment such as the winch drive device, the mud pump 12, and the turntable 13. The diesel generator set 1 is electrically connected to the parallel controller 2, and the parallel controller 2 connects or disconnects the diesel generator according to the system needs to improve the power generation efficiency. The energy compensation controller 11 is electrically connected to the parallel controller 2 and is used to detect the frequency and output power of the diesel generator set 1.

[0022] The winch drive device specifically includes a winch 7 electrically connected to the DC bus 5 for realizing drilling, and an energy compensation controller 11 electrically connected to the winch 7 for detecting the state of the winch 7 and determining whether the specific working condition is the traveling block lifting or lowering state.

[0023] like Figure 1 As shown, the flywheel energy storage device includes a flywheel 9 and a flywheel converter 8 electrically connected to the flywheel 9, and the flywheel converter 8 is electrically connected to the DC bus 5. The flywheel 9 is connected to the DC bus 5 through the flywheel converter 8, and can absorb electric energy from the DC bus 5 and release electric energy to the DC bus 5. The flywheel energy storage controller 10 is electrically connected to the flywheel converter 8, and is used to detect the current power of the flywheel 9 and the battery charge state and send them to the energy compensation controller 11.

[0024] Specifically, in the working condition of drilling, when the traveling carriage is lifted, the flywheel converter 8 works in the power mode, and the energy compensation controller 11 collects the frequency of the AC bus 3 and the voltage of the DC bus 5. According to the output power and frequency change value and coefficient of the current diesel generator set 1, the energy value that the microgrid needs to supplement is calculated and transmitted to the flywheel energy storage controller 10. The flywheel energy storage controller 10 then integrates the state of the winch 7, the output value of the generator set, the current power and rated power of the flywheel energy storage device, and the battery charge state SOC of the flywheel, calculates the energy value that the current flywheel energy storage device needs to output, and sends the instruction to the flywheel converter 8, and the flywheel converter 8 controls the flywheel to transmit energy to the DC bus 5. When the traveling carriage is lowered, the flywheel converter 8 works in the voltage mode, absorbs the electric energy converted from potential energy, and stabilizes the bus voltage.

[0025] The oil drilling microgrid energy compensation system of the utility model is provided with an energy compensation controller 11, a flywheel energy storage device and a flywheel energy storage controller 10 which are electrically connected to the microgrid. The energy compensation controller 11 controls the operation of the flywheel energy storage device through the flywheel energy storage controller 10 according to the states of the bus, the power supply device, the winch drive device and the flywheel energy storage device, and quickly charges and discharges according to current needs to smooth the load fluctuation of the power supply device, thereby reducing the configuration capacity of the generator set and improving the operating efficiency of the generator set.

[0026] Although the specific implementation methods of the utility model are described above, those skilled in the art should understand that the described embodiments are only part of the implementation methods of the utility model, rather than all the implementation methods, which are only examples, and the protection scope of the utility model is defined by the claims. Those skilled in the art can make various changes or modifications to these implementation methods without departing from the principle and essence of the utility model and without any creative work, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. Oil drilling microgrid energy compensation system, characterized by: It includes an energy compensation controller electrically connected to a microgrid, a flywheel energy storage device and a flywheel energy storage controller, wherein the microgrid includes a power supply device electrically connected to a bus and a winch drive device; the flywheel energy storage controller detects the state of the flywheel energy storage device and sends a state signal to the energy compensation controller, the bus, the power supply device and the winch drive device send a state signal to the energy compensation controller, the energy compensation controller sends a control signal that needs to be compensated or released to the flywheel energy storage controller, and the flywheel energy storage controller controls the action of the flywheel energy storage device.

2. The oil drilling microgrid energy compensation system according to claim 1, characterized in that: The bus includes an AC bus and a DC bus, and the energy compensation controller includes a frequency sampling circuit and a voltage sampling circuit. The frequency sampling circuit is connected to the AC bus, and the voltage sampling circuit is connected to the DC bus.

3. The oil drilling microgrid energy compensation system according to claim 2, characterized in that: The power supply device includes a diesel generator set, the diesel generator set is electrically connected to a parallel controller, the diesel generator is electrically connected to the AC bus, and the energy compensation controller is electrically connected to the parallel controller for detecting the frequency and output power of the diesel generator set.

4. The oil drilling microgrid energy compensation system according to claim 2, characterized in that: The winch driving device includes a winch electrically connected to the DC bus, and the energy compensation controller is electrically connected to the winch for detecting the state of the winch.

5. The oil drilling microgrid energy compensation system according to claim 2, characterized in that: The flywheel energy storage device includes a flywheel and a flywheel converter electrically connected to the flywheel, and the flywheel converter is electrically connected to the DC bus.

6. The oil drilling microgrid energy compensation system according to claim 5, characterized in that: The flywheel energy storage controller is electrically connected to the flywheel converter to detect the current power of the flywheel and the battery charge state and send them to the energy compensation controller.

7. The oil drilling microgrid energy compensation system according to any one of claims 2 to 6, characterized in that: A rectifier is electrically connected between the AC bus and the DC bus.

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