Diesel-storage hybrid energy storage supply method

Abstract

The invention relates to a diesel-storage hybrid energy supply method, which comprises the following steps of: establishing a diesel-storage hybrid energy system, in which diesel storage refers to a diesel generating set and an energy storage subsystem; obtaining rated power of the diesel generating set; judging numerical values of the required power of the target drilling machine and the rated power of the diesel generating set, and when the required power of the target drilling machine is greater than the rated power of the diesel generating set, starting the diesel-storage hybrid energy system and the diesel generating set to supply power to the target drilling machine simultaneously; otherwise, only starting the diesel-storage hybrid energy system to supply power to the target drilling machine, and stopping the diesel generating set. The diesel-storage hybrid energy storage supply method solves the problem of large energy consumption of the generator, recovers and stores surplus energy of the generator to form a hybrid energy supply mode combining the generator and energy storage, when the load demand of the generator is large, the diesel generator and the energy storage are used for supplying power at the same time, and when the load is small, the diesel generator is stopped, and an energy storage battery power supply mode is started to realize automatic allocation of energy storage power. The generator and energy storage can be automatically switched, and unattended operation is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of oil drilling power, and particularly relates to a method for supplying a diesel and energy storage hybrid energy supply system. Background Art

[0002] In the power supply mode of the generator at the drilling site, the power demand changes greatly, the reactive power consumption is large, and the fuel waste is serious. Especially when a single generator operates at full load, the instantaneous power suddenly increases, resulting in faults such as generator flameout or control system tripping. To reduce the occurrence of such faults, the drilling team generally starts two generators for operation, which results in greater reactive power loss and more fuel consumption, and serious waste. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for supplying a diesel and energy storage hybrid energy supply system to overcome the above technical defects.

[0004] To solve the above technical problems, the present invention provides a method for supplying a diesel and energy storage hybrid energy supply system, including: Construct a diesel and energy storage hybrid energy system, where diesel and energy storage refer to a diesel generator set and an energy storage subsystem; Obtain the rated power of the diesel generator set; Judge the numerical value of the power required by the target drill and the rated power of the diesel generator set. When the power required by the target drill is greater than the rated power of the diesel generator set, start the diesel and energy storage hybrid energy system and the diesel generator set to supply power to the target drill simultaneously; otherwise, only enable the diesel and energy storage hybrid energy system to supply power to the target drill and stop the diesel generator set.

[0005] The diesel and energy storage hybrid energy system at least includes a diesel generator set and an energy storage subsystem; The energy storage subsystem is electrically connected to the diesel generator set to recover the energy of the diesel generator; The diesel generator set and the energy storage subsystem are respectively connected to the target drill.

[0006] The energy storage subsystem includes a battery pack, a battery management system, an energy storage inverter, and a fire protection system; The battery pack is electrically connected to the battery management system, and the battery management system is used to monitor the operating status of each battery in the battery pack; The battery management system is electrically connected to the energy storage inverter and the fire protection system through a communication interface or an I / O interface.

[0007] The battery pack is a lithium iron phosphate battery pack.

[0008] The battery pack is electrically connected to a photovoltaic panel.

[0009] The diesel and energy storage hybrid energy system further includes an energy management system; The energy management system identifies load changes, where the loads include the living area load and the target drilling rig. When the power required by the target drilling rig is greater than the rated power of the diesel generator set, the diesel-storage hybrid energy system and the diesel generator set are started to supply power to the target drilling rig at the same time; otherwise, only the diesel-storage hybrid energy system is enabled to supply power to the target drilling rig and / or to the living area load, and the diesel generator set is disabled.

[0010] The diesel-storage hybrid energy system also includes a remote operation and maintenance cloud platform; The diesel-storage hybrid energy system, energy management system, target drilling rig and living area loads are all electrically connected to the remote operation and maintenance cloud platform, which monitors the on-site power consumption, compiles statistics on the on-site load data to remotely optimize parameter configuration and diagnose and troubleshoot faults.

[0011] The beneficial effects of the present invention are: The present invention utilizes the energy storage subsystem to recycle and store the surplus energy of the generator. When the load demand of the generator is large, the diesel generator set and the energy storage subsystem are used for power supply at the same time. When the load is small, the diesel generator set is stopped and the energy storage battery power supply mode is turned on to realize automatic allocation of energy storage power. The generator and energy storage can be automatically switched, which expands the power usage of the generator, reduces the investment in equipment at the drilling site, and reduces fuel consumption. The energy supply method can meet various working conditions at the drilling site and improve the energy supply capacity of the generator. DETAILED DESCRIPTION

[0012] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0013] The present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0014] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0015] This embodiment relates to the present invention and provides a diesel-storage hybrid energy storage supply method, comprising: Step 100, constructing a diesel-storage hybrid energy system, wherein the diesel-storage refers to a diesel generator set and an energy storage subsystem.

[0016] Specifically, the diesel and energy storage hybrid energy system at least includes a diesel generator set and an energy storage subsystem. Among them, the energy storage subsystem is electrically connected to the diesel generator set to recover the energy of the diesel generator. Regarding the process of recovering the surplus energy of the diesel generator, reference can be made to the plug-in hybrid technology of new energy vehicles.

[0017] The above-mentioned recovery of the energy of the diesel generator, where the energy refers to the surplus energy. For example, the power of the diesel generator is 300KW, but only 200KW of energy is actually used during drilling, and the remaining energy can only be wasted. In this embodiment, the energy storage subsystem is used to recover and store this part of the energy for later use.

[0018] The diesel generator set and the energy storage subsystem are respectively connected to the target drilling rig, and their purpose is to provide energy for the target drilling rig.

[0019] The energy storage subsystem includes a battery pack, a battery management system, an energy storage converter, and a fire protection system.

[0020] The battery pack is a lithium iron phosphate battery pack, such as the lithium iron phosphate battery of CATL. The discharge rate of this battery is lower than 1.5C to maximize the safety of the battery. The battery Pack and battery cluster adopt a two-stage perfluorinated hexanone active fire protection system to prevent re-ignition.

[0021] The battery pack is electrically connected to the battery management system, and the battery management system is used to monitor the operating status of each battery in the battery pack.

[0022] The battery management system, abbreviated as BMS, is responsible for monitoring the operating status of each battery in the energy storage unit to ensure the safe and reliable operation of the energy storage unit. BMS can monitor and collect the state parameters of the energy storage battery in real time (including but not limited to the voltage of each single battery, the temperature of the battery terminal, the current of the battery circuit, the terminal voltage of the battery pack, the insulation resistance of the battery system, etc.), and perform necessary analysis and calculations on the relevant state parameters to obtain more system state evaluation parameters, and realize the effective control of the energy storage battery body according to specific protection control strategies to ensure the safe and reliable operation of the entire battery energy storage unit.

[0023] The battery management system is electrically connected to the energy storage converter and the fire protection system through a communication interface or an I / O interface.

[0024] Specifically, the battery management system BMS can interact with other external devices (such as the energy storage converter PCS, the energy management system EMS, the fire protection system, etc.) through its own communication interface and analog / digital input interfaces to form the interlocking control of each subsystem in the entire energy storage power station, ensure the safe, reliable and efficient grid-connected operation of the power station, and implement the standard GB / T34131-2023 "Battery Management System for Electric Energy Storage".

[0025] The above fire protection system is mainly composed of a perfluoromethylcyclohexanone fire extinguishing control system, which can quickly suppress the fire, reduce the spread and damage of the fire. The fire extinguishing agent has the characteristics of low toxicity, no corrosion and non-conductivity, has high safety performance for the human body and equipment, and will not cause secondary damage to the environment and equipment.

[0026] The perfluoromethylcyclohexanone used in this fire protection system is an efficient fire extinguishing agent, which has the ability to quickly extinguish fires and can effectively inhibit the spread of flames. Its fire extinguishing effect is far better than that of traditional fire extinguishing agents. The perfluoromethylcyclohexanone fire extinguishing system adopts automatic control, can quickly respond to fire signals and start the fire extinguishing program, greatly shortening the reaction time of fire extinguishing and effectively controlling the development of the fire. This system is easy to use, does not require manual intervention, can automatically detect fire signals and start the fire extinguishing device, greatly reducing the risk of human operation and the possibility of operation errors. In addition, the spraying speed of the perfluoromethylcyclohexanone fire extinguishing system can be adjusted, and it can flexibly respond according to the degree of fire threat in different scenarios to ensure the maximization of the fire extinguishing effect.

[0027] The energy storage converter, abbreviated as PCS, its main function is to control the charging and discharging of the batteries in the battery pack, and it is a bidirectional current conversion device for inversion and rectification. The execution standard is: GB / T 34120 Technical Specification for Energy Storage Converters of Electrochemical Energy Storage Systems.

[0028] The energy storage converter PCS can also quickly adjust the active power and compensate the reactive power, effectively improving the voltage and frequency fluctuations of the diesel generator set caused by sudden load addition, sudden load unloading and the peak power of equipment startup, and ensuring the stability of power supply; the power electronic equipment energy storage PCS can adapt to various types of loads (resistive, inductive, motor load, mixed load) and meet the diverse power supply needs of users.

[0029] Step 200, obtain the rated power of the diesel generator set.

[0030] The diesel generator set can select a 300KW Volvo diesel generator set.

[0031] Step 300, judge the numerical values of the power required by the target drill and the rated power of the diesel generator set. When the power required by the target drill is greater than the rated power of the diesel generator set, start the diesel-electricity hybrid energy system and the diesel generator set to supply power to the target drill simultaneously; otherwise, only enable the diesel-electricity hybrid energy system to supply power to the target drill and stop the diesel generator set.

[0032] The diesel-electricity hybrid energy system also includes an energy management system; The energy management system identifies load changes, where the load includes the living area load and the target drill rig. When the power required by the target drill rig is greater than the rated power of the diesel generator set, the diesel-hydrogen hybrid energy system and the diesel generator set are started to supply power to the target drill rig simultaneously; otherwise, only the diesel-hydrogen hybrid energy system is enabled to supply power to the target drill rig and / or to the living area load, and the diesel generator set is deactivated.

[0033] The Energy Management System (EMS) can automatically identify load changes, automatically shut down the diesel generator, and start the energy storage subsystem to supply power, avoiding the idling of the diesel generator during the construction waiting period, saving fuel and improving the operating reliability of the diesel generator; when the construction load at night becomes small, the energy storage subsystem alone is used to supply power to the living area load, with low noise.

[0034] The Energy Management System (EMS) realizes the automatic switching between energy storage and power generation, without unattended operation. When the load demand is large, both the diesel generator and the energy storage supply power simultaneously. When the load is low, the diesel generator stops and the energy storage battery power supply mode is turned on, enabling the diesel generator set to always operate in the fuel-saving stage above the optimal economic power, achieving safe, reliable, low-carbon, fuel-saving, and environmentally friendly operation.

[0035] In some embodiments, to supplement the power of the battery packs in the energy storage subsystem, the battery packs are electrically connected to photovoltaic panels, and the photovoltaic panels provide energy to make up for the deficiency of the energy recovered by the diesel generator set.

[0036] Through the energy storage subsystem, the power of a 300KW diesel generator can be extended to 450KW, which can meet the stable power supply of the generator under impact loads, reduce the configuration of one generator in the conventional well construction of oil and gas wells, and greatly save diesel consumption. For example: During the normal use of each 300KW generator, the hourly fuel consumption is 80 - 100KG, and the theoretical daily consumption at full load is 1920 - 2400KG. Calculated according to the savings of 20% of diesel or gas for the generator, 384 - 480KG of diesel is saved, and 800 - 1500 degrees of electric energy is recovered per day, saving 1500 yuan - 2500 yuan per day.

[0037] The diesel-hydrogen hybrid energy system also includes a remote operation and maintenance cloud platform: The diesel-hydrogen hybrid energy system, the energy management system, the target drill rig, and the living area load are all electrically connected to the remote operation and maintenance cloud platform. The remote operation and maintenance cloud platform monitors the on-site power consumption situation, statistically analyzes the on-site load data to remotely optimize parameter configuration and diagnose and eliminate faults.

[0038] The energy management system and the remote operation and maintenance cloud platform realize unmanned on-site operation. Users can control the on-site power consumption situation, statistically analyze the on-site load data, remotely optimize parameter configuration, diagnose and eliminate faults at any time through the monitoring cloud platform APP.

[0039] In the process of solving the problems of recovering, storing, and reusing the surplus energy of fuel or gas generators, energy recovery technology is mainly used to recover and store the surplus energy of the generators, forming a hybrid power supply mode that combines generators and energy storage. When the power is greater than the rated power of the generator, the generator + energy storage is used to supply power simultaneously to meet the instantaneous high-power demand of the generator, reduce the configuration of diesel generators. When the power is less than the set value, the energy storage is enabled to supply power and the generator is stopped to save diesel consumption.

[0040] In the above-mentioned recovery process, the energy storage and power compensation transient response technology is borrowed. The impact load compensation device continuously detects the voltage and current of the power grid to realize the rapid input and flexible withdrawal of the electric energy compensation unit, and effectively realizes the rapid replenishment of energy. The impact load compensation device is in parallel with the natural gas power station. It continuously monitors the power on the load side. When the impact load is put into operation, the device will inject 400 kW of active power into the system through the IGBT inverter system to ensure the stable operation of the natural gas power station. In the power supply mode of the generator at the drilling site, the power demand changes greatly, the reactive power consumption is large, and the fuel waste is serious. Especially when a single generator operates at full load, the instantaneous power suddenly increases, causing faults such as generator flameout or control system tripping. To reduce such faults, the drilling team generally starts two generators for operation, resulting in greater reactive power loss and more fuel consumption, with serious waste.

[0041] In this embodiment, a device for recovering, storing, and reusing the surplus energy of the generator is realized. The peak shaving and valley filling with energy storage are realized, the configuration of diesel generators is reduced, and a hybrid power supply mode that combines the generator + energy storage is formed, meeting the requirements of energy conservation, consumption reduction, and green development.

[0042] The energy storage system and the diesel generator set supply power in two ways. The peak shaving and valley filling enable the generator to always operate in the high-efficiency area, with high power supply reliability, energy conservation, and fuel saving. According to statistics of 3 wells, the average fuel saving is 24.6%. Moreover, the operation time of the diesel generator is shortened, the operation noise is low, the EMS energy management system automatically identifies the load change, automatically shuts down the diesel generator, and starts the energy storage system to supply power, avoiding the idling of the diesel generator during the construction material waiting period, saving fuel and improving the operation reliability of the diesel generator. When the load becomes small during night construction, the energy storage system is used alone to supply power to the living area load, with low noise.

[0043] The electric energy provided by the diesel-electric hybrid energy storage supply method has high reliability and fast output response. The energy storage undertakes sudden load increases and decreases, and the output power of the diesel generator set is stable, realizing rapid regulation of the supply voltage and frequency of the hybrid energy power supply station; it has strong anti-impact ability, specifically referring to the ability to rapidly adjust the active power, compensate the reactive power, and be able to adapt to use under sudden load addition and unloading. The voltage and frequency stability of the diesel generator set is good, and it can meet the diverse electricity consumption needs of the drilling site users.

[0044] The diesel and energy storage hybrid energy supply method provided by this embodiment solves the problems of high energy consumption and low fuel utilization rate of high-power diesel generators in oil drilling, and solves the technical problems of surplus energy recovery and automatic allocation and utilization. It meets the overall requirements of the country for energy conservation and emission reduction, achieves good experimental results, can meet the energy storage of all types of high-power generators, expands the power of the generators used, reduces the investment in equipment at the drilling site, reduces fuel consumption, and its energy supply method can meet various working conditions at the drilling site, improves the energy supply capacity of the generators, is suitable for the power energy supply of oil and gas field drilling, has obvious energy conservation and emission reduction effects, has good economic and social benefits, and has good market application prospects.

[0045] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present invention, and in actual applications, various changes can be made in form and details without departing from the spirit and scope of the present invention.

Claims

1. A method for supplying a combined energy storage system of fuel and energy storage, characterized in that, Including: Construct a diesel-storage hybrid energy system, where diesel-storage refers to a diesel generator set and an energy storage subsystem; Obtain the rated power of the diesel generator set; Judge the values of the power required by the target drill rig and the rated power of the diesel generator set. When the power required by the target drill rig is greater than the rated power of the diesel generator set, start the diesel-storage hybrid energy system and the diesel generator set to supply power to the target drill rig simultaneously; otherwise, only enable the diesel-storage hybrid energy system to supply power to the target drill rig and deactivate the diesel generator set.

2. The fuel-storage hybrid energy storage supply method according to claim 1, wherein The diesel-storage hybrid energy system includes at least a diesel generator set and an energy storage subsystem; The energy storage subsystem is electrically connected to the diesel generator set to recover the energy of the diesel generator; The diesel generator set and the energy storage subsystem are respectively connected to the target drill rig.

3. The method for supplying energy by a combined energy storage system of a diesel generator and energy storage devices according to claim 2, wherein The energy storage subsystem includes a battery pack, a battery management system, an energy storage converter, and a fire protection system; The battery pack is electrically connected to the battery management system, and the battery management system is used to monitor the operating status of each battery in the battery pack; The battery management system is electrically connected to the energy storage converter and the fire protection system through a communication interface or an I / O interface.

4. The fuel-storage hybrid energy storage supply method according to claim 3, wherein The battery pack is a lithium iron phosphate battery pack.

5. The fuel-storage hybrid energy storage supply method according to claim 3 or 4, characterized in that The battery pack is electrically connected to a photovoltaic panel.

6. The method for supplying a combined fuel and energy storage system according to claim 2 or 3, characterized in that, The diesel-storage hybrid energy system further includes an energy management system; The energy management system identifies load changes, where the load includes the living area load and the target drill rig. When the power required by the target drill rig is greater than the rated power of the diesel generator set, start the diesel-storage hybrid energy system and the diesel generator set to supply power to the target drill rig simultaneously; otherwise, only enable the diesel-storage hybrid energy system to supply power to the target drill rig and / or supply power to the living area load, and deactivate the diesel generator set.

7. The method for supplying energy by a combined fuel and energy storage system according to claim 6, characterized in that, The diesel-storage hybrid energy system further includes a remote operation and maintenance cloud platform; The diesel-storage hybrid energy system, the energy management system, the target drill rig, and the living area load are all electrically connected to the remote operation and maintenance cloud platform. The remote operation and maintenance cloud platform monitors the on-site power consumption status, statistics the on-site load data to remotely optimize parameter configuration and diagnose and eliminate faults.