Well drilling energy storage system control method

Abstract

The invention discloses a well drilling energy storage system control method, which comprehensively manages a generator set and an energy storage device, and realizes generator set operation parameter acquisition, generator automatic start-stop control, impact load potential energy recovery, and generator operation power control and scheduling. The problems that a large motor set for well drilling is high in investment, low in fuel oil utilization rate and serious in air pollution are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum electric drilling rig power systems, and in particular relates to a drilling energy storage system control method. Background Art

[0002] In daily drilling work, due to the large power variation of drilling conditions, in order to meet the pulse power requirements (such as drilling conditions), an additional generator set has to be added to the grid to meet the needs of drilling conditions. During most of the time when the drilling rig is running, the diesel generator set that provides power for the drilling equipment is often in a "big horse pulling a small cart" operation state, usually only 10-30% of the rated power but produces high index fuel consumption and additional emissions, resulting in low efficiency and high cost. This situation accompanies the entire drilling cycle. The additional units not only increase the purchase cost, but also cause a large amount of fuel waste when idling or lightly loaded; the drilling rig often experiences sudden increase and decrease in load power during operation, which has a great impact on the power system. The sudden change in power causes incomplete combustion of fuel in the diesel generator set, resulting in the so-called "diesel engine emitting black smoke" phenomenon, which not only wastes a lot of fuel, but also causes environmental pollution, and at the same time causes large fluctuations in the generator bus voltage and unit frequency, causing damage to electrical equipment; there is a large amount of potential energy in the drilling operation process, which is not currently recycled, but converted into heat release through energy consumption braking, resulting in energy waste.

[0003] In order to solve the problems of high fixed asset investment, low fuel utilization, and serious air pollution caused by backward power grid management technology in traditional electric drilling rigs, users have an urgent need; electric drilling rigs have intelligent management, and energy storage systems that improve energy efficiency have become the development direction of electric drilling rig power systems. Summary of the invention

[0004] The purpose of the present invention is to provide a control method for a drilling energy storage system to solve the problems of high investment, low fuel utilization and serious air pollution of large motor sets used for drilling.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a drilling energy storage system control method, which comprehensively manages the generator set and the energy storage device, realizes the generator set operating parameter collection, generator automatic start and stop control, impact load potential energy recovery, generator operating power control and scheduling method.

[0006] As a preferred technical solution of the present invention, it includes:

[0007] Step 1: The energy storage system monitors and collects the active power, reactive power, power factor and impact load power of the generator set in real time;

[0008] Step 2, when an impact load is detected and the load generated by the impact load cannot be recovered: if the storage capacity of the energy storage device has not reached the lower limit, the energy storage device will discharge, and then repeat the work of step S1; if the storage capacity of the energy storage device reaches the lower limit, the work of step S1 will be repeated.

[0009] As a preferred technical solution of the present invention, it includes:

[0010] Step 3, when an impact load is detected and the potential energy generated by the impact load can be recovered: if the storage capacity of the energy storage device has not reached the upper limit, the potential energy recovery inverter will work and charge the energy storage device and supply power for the load equipment, and then repeat step 1; if the storage capacity of the energy storage device reaches the upper limit, step 1 will be repeated.

[0011] As a preferred technical solution of the present invention, it includes:

[0012] Step 4: When no impact load is detected, the generator status and energy storage device status are comprehensively judged. If a charging command is issued:

[0013] When the generator offline condition is not met and the energy storage device has not reached the upper limit, the energy storage device will be charged, and then the work of step 1 will be repeated;

[0014] When the generator offline conditions are not met and the energy storage device reaches the upper limit, step 1 will be repeated;

[0015] When the generator offline conditions are met, the generator is offline, and then the work in step 1 is repeated.

[0016] As a preferred technical solution of the present invention, it includes:

[0017] Step 5: When no impact load is detected, the generator status and energy storage device status are comprehensively judged. If a discharge instruction is issued:

[0018] When the generator online conditions are not met and the energy storage device storage capacity has not reached the lower limit, the energy storage device will discharge, and then repeat step 1;

[0019] When the generator online conditions are not met and the energy storage device storage capacity reaches the lower limit, step 1 will be repeated;

[0020] If the generator on-line conditions are met, the generator is put on-line, and then the work in step 1 is repeated.

[0021] The beneficial effects of the present invention are as follows: the drilling energy storage system control method of the present invention realizes potential energy recovery and automatic start-stop scheduling management of the generator set; realizes the charge and discharge control of the energy storage device, reduces the impact of the load on the generator set and the capacity requirements. It reduces the dependence of the drilling site on the dedicated unit, reduces the purchase cost of the generator set, reduces fuel consumption, and improves the quality of power. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the drilling energy storage system control method of the present invention. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings, tables and specific embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] The present invention is further described below by way of examples, but is not limited to the following embodiments.

[0025] Example 1

[0026] The drilling energy storage system control method of the present invention is based on the principle of comprehensively managing the generator set and the energy storage device to realize the generator set operation parameter collection, generator automatic start and stop control, impact load potential energy recovery, generator operation power control and scheduling method.

[0027] The drilling energy storage system control method of the present invention realizes potential energy recovery and automatic start-stop scheduling management of generator sets; realizes the charge and discharge control of the energy storage device, reduces the impact of the load on the generator set and the capacity requirement. It reduces the dependence of the drilling site on the dedicated unit, reduces the purchase cost of the generator set, reduces fuel consumption, and improves the quality of power.

[0028] Example 2

[0029] like Figure 1 As shown, in the drilling energy storage system control method of the present invention, the specific control is as follows:

[0030] Step 1: The energy storage system monitors and collects the active power, reactive power, power factor and impact load power of the generator set in real time;

[0031] Step 2, when an impact load is detected and the load generated by the impact load cannot be recovered: if the storage capacity of the energy storage device has not reached the lower limit, the energy storage device will discharge, and then repeat the work of step S1; if the storage capacity of the energy storage device reaches the lower limit, the work of step S1 will be repeated.

[0032] Example 3

[0033] like Figure 1As shown, in the drilling energy storage system control method of the present invention, the specific control is as follows:

[0034] Step 1: The energy storage system monitors and collects the active power, reactive power, power factor and impact load power of the generator set in real time;

[0035] Step 3, when an impact load is detected and the potential energy generated by the impact load can be recovered: if the storage capacity of the energy storage device has not reached the upper limit, the potential energy recovery inverter will work and charge the energy storage device and supply power for the load equipment, and then repeat step 1; if the storage capacity of the energy storage device reaches the upper limit, step 1 will be repeated.

[0036] Example 4

[0037] like Figure 1 As shown, in the drilling energy storage system control method of the present invention, the specific control is as follows:

[0038] Step 1: The energy storage system monitors and collects the active power, reactive power, power factor and impact load power of the generator set in real time;

[0039] Step 4: When no impact load is detected, the generator status and energy storage device status are comprehensively judged. If a charging command is issued:

[0040] When the generator offline condition is not met and the energy storage device has not reached the upper limit, the energy storage device will be charged, and then the work of step 1 will be repeated;

[0041] When the generator offline conditions are not met and the energy storage device reaches the upper limit, step 1 will be repeated;

[0042] When the generator offline conditions are met, the generator is offline, and then the work in step 1 is repeated.

[0043] Example 5

[0044] like Figure 1 As shown, in the drilling energy storage system control method of the present invention, the specific control is as follows:

[0045] Step 1: The energy storage system monitors and collects the active power, reactive power, power factor and impact load power of the generator set in real time;

[0046] Step 5: When no impact load is detected, the generator status and energy storage device status are comprehensively judged. If a discharge instruction is issued:

[0047] When the generator online conditions are not met and the energy storage device storage capacity has not reached the lower limit, the energy storage device will discharge, and then repeat step 1;

[0048] When the generator online conditions are not met and the energy storage device storage capacity reaches the lower limit, step 1 will be repeated;

[0049] If the generator on-line conditions are met, the generator is put on-line, and then the work in step 1 is repeated.

[0050] It should be noted that there is no logical relationship between the control situations involved in Examples 2-5, and they are only controls performed for different situations.

[0051] The above description shows and describes several preferred embodiments of the invention, but as mentioned above, it should be understood that the invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and modifications made by those skilled in the art should be within the scope of protection of the claims attached to the invention without departing from the spirit and scope of the invention.

Claims

1. A drilling energy storage system control method, characterized in that: Comprehensively manage generator sets and energy storage devices to realize generator set operating parameter collection, generator automatic start and stop control, impact load potential energy recovery, generator operating power control and scheduling methods.

2. The drilling energy storage system control method according to claim 1, characterized in that: include: Step 1: The energy storage system monitors and collects the active power, reactive power, power factor and impact load power of the generator set in real time; Step 2, when an impact load is detected and the load generated by the impact load cannot be recovered: if the storage capacity of the energy storage device has not reached the lower limit, the energy storage device will discharge, and then repeat the work of step S1; if the storage capacity of the energy storage device reaches the lower limit, the work of step S1 will be repeated.

3. The drilling energy storage system control method according to claim 2, characterized in that: include: Step 3, when an impact load is detected and the potential energy generated by the impact load can be recovered: if the storage capacity of the energy storage device has not reached the upper limit, the potential energy recovery inverter will work and charge the energy storage device and supply power for the load equipment, and then repeat step 1; if the storage capacity of the energy storage device reaches the upper limit, step 1 will be repeated.

4. The drilling energy storage system control method according to claim 3, characterized in that: include: Step 4: When no impact load is detected, the generator status and energy storage device status are comprehensively judged. If a charging command is issued: When the generator offline condition is not met and the energy storage device has not reached the upper limit, the energy storage device will be charged, and then the work of step 1 will be repeated; When the generator offline conditions are not met and the energy storage device reaches the upper limit, step 1 will be repeated; When the generator offline conditions are met, the generator is offline, and then the work in step 1 is repeated.

5. The method for using the drilling energy storage system control method according to claim 4, characterized in that: include: Step 5: When no impact load is detected, the generator status and energy storage device status are comprehensively judged. If a discharge instruction is issued: When the generator online conditions are not met and the energy storage device storage capacity has not reached the lower limit, the energy storage device will discharge, and then repeat step 1; When the generator online conditions are not met and the energy storage device storage capacity reaches the lower limit, step 1 will be repeated; If the generator on-line conditions are met, the generator is put on-line, and then the work in step 1 is repeated.

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