Power management system of petroleum drilling machine

Abstract

The utility model relates to a power management system of a petroleum drilling machine. The power management system comprises more than two power generation modules and an alternating current bus, each power generation module comprises a generator set, a circuit breaker and a control module; the output end of the generator set is electrically connected with the alternating-current bus through the circuit breaker, and the alternating-current bus is suitable for being electrically connected with a load; each control module comprises a generator controller, a voltage regulator and a speed controller; the voltage regulator is electrically connected with excitation of the generator set, and the speed controller is electrically connected with the generator set to regulate the current rotating speed of the generator set; the first input end of the generator controller is electrically connected with the output end of the generator set; the second input end of the generator controller is electrically connected with the output end of the speed controller; the third input end of the generator controller is electrically connected with the alternating current bus to collect the voltage of the alternating current bus; and the output end of the generator controller is electrically connected with a closing coil of the circuit breaker so as to control the on-off of the current circuit breaker.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rig power distribution technology, and particularly relates to a petroleum drilling rig power management system. BACKGROUND

[0002] At present, the power management system is commonly applied in the ship power station automation system. With the development of power technology, the function of the power management system is more and more comprehensive, and the generation, distribution and consumption of the ship power can be comprehensively controlled. However, the petroleum drilling rig on land currently generally uses a fixed number of diesel generator sets to supply power to the petroleum drilling rig drawworks, mud pumps and other power-consuming equipment. However, if other large-capacity loads are put into operation or other large equipment is started, the generator set currently supplying power to the power-consuming equipment is likely to be unable to meet the load requirements of all power-consuming equipment, which may cause the phenomenon of power supply under-voltage. If the large equipment is in the under-voltage state for a long time, it is easy to cause the production efficiency to be reduced, and even the motor to be burned out. SUMMARY

[0003] Therefore, the present application provides a petroleum drilling rig power management system.

[0004] According to an aspect of the present application, a petroleum drilling rig power management system is provided, characterized in that it comprises two or more power generation modules and an AC bus.

[0005] Each power generation module comprises a generator set, a circuit breaker and a control module. The output end of the generator set is electrically connected to the AC bus through the circuit breaker, and the AC bus is adapted to be electrically connected to the load.

[0006] The control module comprises a generator controller, a voltage regulator and a speed controller. The voltage regulator is electrically connected to the excitation of the generator set to adjust the excitation voltage of the generator set, and the speed controller is electrically connected to the generator set to adjust the speed of the current generator set.

[0007] The first input end of the generator controller is electrically connected to the output end of the generator set to collect the output voltage of the generator set. The second input end of the generator controller is electrically connected to the output end of the speed controller to collect the speed of the generator set. The third input end of the generator controller is electrically connected to the AC bus to collect the voltage of the AC bus.

[0008] The output end of the generator controller is electrically connected to the closing coil of the circuit breaker to control the on-off of the current circuit breaker.

[0009] In a possible implementation, the control module further comprises a transformer T1. The input end of the transformer T1 is electrically connected to the three-phase output end of the generator to collect the output voltage of the generator set, and the output end of the transformer T1 is electrically connected to the first input end of the generator controller.

[0010] In a possible implementation, the control module further comprises a transformer T2; an input end of the transformer T2 is electrically connected with the three-phase output end of the generator set, and an output end of the transformer T2 is electrically connected with the voltage regulator to supply power for the voltage regulator.

[0011] In a possible implementation, a transformer T4 is further included; an input end of the transformer T4 is electrically connected with the AC bus to collect the voltage of the AC bus, and an output end of the transformer T4 is electrically connected with the third input end of the generator controller.

[0012] In a possible implementation, four generator modules are provided.

[0013] In a possible implementation, two AC buses are provided.

[0014] Two of the generator modules are electrically connected with one AC bus, and the other two generator modules are electrically connected with the other AC bus.

[0015] In a possible implementation, the two AC buses are electrically connected through two cross-over switches.

[0016] In a possible implementation, the generator controller is of easYgen-2500 type.

[0017] In a possible implementation, the speed controller is of 2301E type.

[0018] In a possible implementation, the voltage regulator is of DECS-100 type.

[0019] Advantages: Each generator set of each generator module is electrically connected with an AC bus, and the AC bus serves as a connection bridge between the multiple generator sets and the load, and is suitable for transmitting the voltage generated by the generator sets to the load and supplying power for the load; a circuit breaker is arranged on the connection circuit between each generator set and the AC bus; the generator controller of the control module is electrically connected with the closing coil of the circuit breaker of the control module, so as to control the on-off of the circuit breaker; when the circuit breaker is opened, the generator set connected with the circuit breaker is disconnected with the AC bus, i.e., in a split state; when the circuit breaker is closed, the generator set connected with the circuit breaker is connected with the AC bus, i.e., in a parallel state; when the generator sets of part of the generator modules are put into the power grid and work normally, if the load is increased (other large-capacity loads are put in or other large equipment is started), and the current put-in generator sets cannot meet the load requirement of all the electrical equipment, the generator controller of the idle generator module in the split state controls the generator set to be put into the parallel state, so as to increase the power supply by increasing the number of generator sets, and make all the loads connected with the AC bus work normally, thereby avoiding the damage of the load equipment caused by the under-voltage.

[0020] Other features and aspects of the present application will become apparent from a detailed description of exemplary embodiments with reference to the following drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the present application and serve to explain the principles of the present application.

[0022] Figure 1 A structural diagram of a power management system of a petroleum drilling rig according to an embodiment of the present application is shown;

[0023] Figure 2 A schematic diagram of a power management system of a petroleum drilling rig according to an embodiment of the present application is shown;

[0024] Figure 3 A partial enlarged view of Figure 2 is shown;

[0025] Figure 4 A partial enlarged view of Figure 2 is shown. DETAILED DESCRIPTION

[0026] Various exemplary embodiments, features, and aspects of the present application will be explained in greater detail below with reference to the accompanying drawings. Like reference numerals may be used to refer to like elements throughout. Although various aspects of embodiments are illustrated, the embodiments are not necessarily drawn to scale, unless specifically noted.

[0027] It should be noted that the terms "center", "longitudinal", "transverse", "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate relative or positional relationships based on the orientation or position shown in the drawings, and are used merely for convenience of description or simplification of description, and do not indicate or imply that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

[0028] In addition, the terms "first", "second", etc. are used only for the purpose of description, and should not be construed as indicating or implying relative importance or implying the number of the technical features indicated thereby. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "plurality" is two or more, unless otherwise specifically limited.

[0029] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0030] In addition, for the purpose of convenience and brevity, detailed descriptions of well-known devices, methods, procedures, components, circuits, and the like will not be described in detail. It should be noted that the application can be practiced with the specifically described applications and experiments. However, it would be understood by those skilled in the art that various modifications, alternative constructions, and equivalents can be used without departing from the spirit and scope of the application.

[0031] Figure 1 A structural diagram of a power management system of an oil drilling rig according to an embodiment of the application is shown; Figure 2 A schematic diagram of a power management system of an oil drilling rig according to an embodiment of the application is shown. As shown in Figure 1 As shown in Figure 2 The power management system of the oil drilling rig comprises two or more power generation modules 200 and an AC bus 100. Each power generation module 200 comprises a generator set 220, a circuit breaker 210, and a control module 230. The output of the generator set 220 is electrically connected to the AC bus 100 through the circuit breaker 210, and the AC bus 100 is adapted to be electrically connected to a load. Each control module 230 comprises a generator controller 233, a voltage regulator 232, and a speed controller 231. The voltage regulator 232 is electrically connected to the field of the generator set 220 to regulate the field voltage of the current generator set 220, and the speed controller 231 is electrically connected to the generator set 220 to regulate the speed of the current generator set 220. The first input of the generator controller 233 is electrically connected to the output of the generator set 220 to collect the output voltage of the generator set 220. The second input of the generator controller 233 is electrically connected to the output of the speed controller 231 to collect the speed of the generator set 220. The third input of the generator controller 233 is electrically connected to the AC bus 100 to collect the voltage of the AC bus 100. The output of the generator controller 233 is electrically connected to the closing coil of the circuit breaker 210 to control the on-off of the current circuit breaker 210.

[0032] Here, it needs to be explained that the generator set 220 of each power generation module 200 is electrically connected with the AC bus 100, the AC bus 100 serves as a connecting bridge between the plurality of generator sets 220 and the load, and is suitable for transmitting the voltage generated by the generator set 220 to the load and supplying power for the load; a circuit breaker 210 is arranged on the connecting circuit between each generator set 220 and the AC bus 100; the generator controller 233 of the control module 230 is electrically connected with the closing coil of the circuit breaker 210 of the power generation module 200, thereby controlling the on-off of the circuit breaker 210, when the circuit breaker 210 is disconnected, the generator set 220 connected with the circuit breaker 210 is disconnected with the AC bus 100, i.e. in a cracking state, when the circuit breaker 210 is closed, the generator set 220 connected with the circuit breaker 210 is in communication with the AC bus 100, i.e. in a parallel state. The voltage regulator 232 and the speed controller 231 of each control module 230 are electrically connected with the generator set 220, when the generator set 220 generates electricity, the voltage regulator 232 of the power generation module 200 is responsible for adjusting the excitation voltage of the generator set 220, to ensure that the generator set 220 can generate stable voltage to the AC bus 100, and the speed controller 231 mainly adjusts the speed of the generator set 220, to ensure that the speed of the generator set 220 is in a stable state; the generator controller 233, the speed controller 231 and the voltage regulator 232 work together to control a generator set 220 to operate normally and stably. When it is needed to crack a generator set 220, the circuit breaker 210 connected with the generator set 200 is controlled to be turned off, and the generator set 220 cannot generate electricity to the AC bus 100.

[0033] A control module 230 is suitable for controlling the synchronization and splitting of a generator set 220; the AC bus 100 and the power supply end of the main electrical load equipment (including: electrical control equipment, winch, mud pump, transformer, special detection equipment and other heavy load equipment) are electrically connected to supply AC 600V working voltage to them. When part of the generator sets 220 are put into the power grid and work normally, if the load increases (other large-capacity loads are put into or other large equipment is started), and all the currently put-in generator sets 220 cannot meet the load requirements of all electrical equipment, the generator controller 233 of the idle generator module 200 controls the synchronization of the generator set 220 to put into standby generator set 220 and evenly distribute the load to balance the operation of multiple units; if the load decreases and the power of the currently put-in generator set 220 is much higher than the required power of the electrical equipment, the generator controller 233 controls the generator set 220 to automatically split to reduce unnecessary loss. The present application can realize the power supply energy management of the oil drilling rig, when the AC bus 100 is in an under-voltage state, the number of generator sets 220 is increased to increase the power supply capacity, so that all the loads connected to the AC bus 100 work normally, avoiding damage to the load equipment; at the same time, it will not cause resource waste and the risk of misoperation, ensuring the stable operation of the power supply system, realizing efficient power supply to the electrical load and effectively saving energy.

[0034] In a possible implementation, further comprising: an energy management system; the energy management system is suitable for collecting the working state and data of each generator module 200; the energy management system comprises: an upper computer 500, an Ethernet gateway 510, a CAN communication gateway 520 and a touch screen 600; the CAN communication gateway 520 is electrically connected with the generator controller 233 of each generator module 200; the upper computer 500 is in communication connection with the CAN communication gateway 520 through the Ethernet gateway 510, and the state of the equipment is monitored through the upper computer 500; the touch screen 600 is electrically connected with the generator controller 233 of each generator module 200 through the CAN communication gateway 520; the main function of the touch screen 600 is to monitor various data and operate the equipment, for example: the current, voltage, power and frequency of the generator set 220 of each generator module 200 can be observed on the touch screen 600, and the staff can also issue instruction signals to each generator controller 233 through the touch screen 600 at any time, and the generator controller 233 controls the closing or opening of the circuit breaker 210 according to the instruction signals; the start and stop of the winch, mud pump and other high-power equipment can also be controlled through the touch screen 600.

[0035] In a possible implementation, the model of each generator controller 233 is easYgen-2500.

[0036] In a possible implementation, the control module 230 further includes a transformer T1; an input end of the transformer T1 is electrically connected to the three-phase output end of the generator set 220 to collect the output voltage of the generator, and an output end of the transformer T1 is electrically connected to an input end of the generator controller 233. It should be noted that, as shown in Figure 2 the primary winding of the transformer T1 is electrically connected to the three-phase output end of the generator set 220 to access the output voltage of the generator set 220, and the secondary winding of the transformer T1 is respectively electrically connected to the 14th pin, the 16th pin and the 18th pin of the generator controller 233, so that the generator controller 233 collects the output voltage of the generator set 220; the transformer T1 is used to convert the 600V voltage generated by the generator set 220 into a 100V voltage, so as to facilitate the collection of the generator controller 233, and direct collection of the 600V voltage is likely to cause a safety accident.

[0037] In a possible implementation, the model of each voltage regulator 232 is DECS-100. The voltage regulator 232 is electrically connected to the generator controller 233, and further, as shown in Figure 2 the A port of the voltage regulator 232 is electrically connected to the 61st pin of the generator controller 233, and the B port of the voltage regulator 232 is electrically connected to the 62nd pin of the generator controller 233. The E1 pin, the E2 pin and the E3 pin of the voltage regulator 232 are electrically connected to the secondary winding of the transformer T1 to collect the output voltage of the generator set 220. The F+ port and the F- port of the voltage regulator 232 are connected to the excitation of the generator set 220 to provide working power for the motor stator and control and adjust the excitation voltage of the generator set 220.

[0038] In a possible implementation, the control module 230 further includes a transformer T2; an input end of the transformer T2 is electrically connected to the three-phase output end of the generator set 220, and an output end of the transformer T2 is electrically connected to an input end of the voltage regulator 232 to supply power to the voltage regulator 232. It should be noted that the primary winding of the transformer T2 is electrically connected to the three-phase output end of the generator set 220 to access the AC 600V voltage, and the secondary winding of the transformer T2 is respectively electrically connected to the 3rd pin, the 4th pin and the 5th pin of the voltage regulator 232 to output the converted AC 120V voltage to the voltage regulator 232 to provide working voltage for the voltage regulator 232.

[0039] In one possible implementation, the control module 230 further includes a speed controller 231, each model number 2301E. The output of the speed controller 231 is electrically connected to the generator set 220 to regulate the current speed of the generator set 220. Furthermore, pins 13, 14, and 15 of the speed controller 231 are electrically connected to the actuator of the generator set 220, which acts as the throttle of the generator, ensuring stable operation of the generator set 220. Figure 2 As shown, pins 4, 6, and 8 of the speed controller 231 are electrically connected to the three-phase output terminals of the generator set 220. Pins 1, 2, and 3 of the speed controller 231 are electrically connected to the secondary winding of the transformer T1 to collect the output voltage of the generator set 220. Although the speed controller 231 controls the speed of the generator set 220, it also needs feedback voltage as an auxiliary basis for determining whether the generator set 220 is operating normally. Pins 19 and 20 of the speed controller 231 are electrically connected to pins 02 and 03 of the generator controller 233, respectively, to send the speed signal to the generator controller 233. Pin 7 of the speed controller 231 and pin 6 of the generator controller 233 are both electrically connected to the ammeter P5 to display the total current of the equipment.

[0040] In one possible implementation, a transformer T4 is also included; the input terminal of transformer T4 is electrically connected to AC bus 100 to collect the voltage of AC bus 100, and the output terminal of transformer T4 is electrically connected to the input terminal of generator controller 233. For example... Figure 2 As shown, the primary winding of transformer T4 is electrically connected to AC bus 100 to receive the voltage of AC bus 100. The secondary winding of transformer T4 is electrically connected to pins 22, 24, and 26 of generator controller 233, respectively, so that generator controller 233 can collect the voltage in AC bus 100.

[0041] In one possible implementation, pins 41 and 42 of the generator controller 233 are electrically connected to the circuit breaker 210 to issue a closing command; pins 80 and 81 of the generator controller 233 are electrically connected to the circuit breaker 210 to issue a tripping command.

[0042] In summary, the generator controller 233 can automatically control the grid connection and disconnection of the generator set 220 and perform charge distribution by collecting the speed of the generator set 220, the output voltage of the generator set 220, and the voltage of the AC bus 100. Further explanation: The generator controller 233 is set with overvoltage and undervoltage protection parameters. When the voltage in the AC bus 100 collected by the generator controller 233 is lower than the undervoltage protection parameter value, the generator controller 233 controls the generator set 220 connected to it to start working and detects the three factors of the output voltage, frequency, and phase of the generator set 220. When the voltage, frequency, and phase angle are stable, the generator controller 233 sends a closing pulse signal to the circuit breaker 210, thereby closing the circuit breaker 210 and putting the generator set 220 into grid connection and use. Conversely, when the voltage in the AC bus 100 exceeds the overvoltage protection parameter value, the generator controller 233 sends a tripping pulse signal to the circuit breaker 210, thereby tripping the circuit breaker 210 and automatically disconnecting the generator set 220.

[0043] In one possible implementation, an active power meter 234 and a reactive power meter 235 are connected in series between the speed controller 231 and the generator controller 233. Further, pin 5 of the speed controller 231 is electrically connected to pin 1S of the active power meter 234, pin 9 of the speed controller 231 is electrically connected to pin 3S of the active power meter 234, pin 05 of the generator controller 233 is electrically connected to pin 1L of the reactive power meter 235, pin 07 of the generator controller 233 is electrically connected to pin 3L of the reactive power meter 235, and pin 1L of the active power meter 234 is electrically connected to pin 1S of the reactive power meter 235, and pin 3L of the active power meter 234 is electrically connected to pin 3S of the reactive power meter 235.

[0044] In one possible implementation, such as Figure 2 As shown, each control module 230 is also equipped with a transformer T3, a relay K7 and an indicator light; the relay K7 is electrically connected to the secondary winding of the transformer T3 to access a 220V power supply, and the indicator light is electrically connected to the normally open contact of the relay K7. When the relay K7 is energized, the normally open contact closes and the indicator light illuminates. The indicator light is used to show whether the generator set 220 is in the grid-connected power generation state or the disconnected state.

[0045] In one possible implementation, each control module 230 is also provided with a control panel 240; the control panel 240 is electrically connected to the generator controller 233; it should be noted that the main function of the control panel 240 is to display some important parameters (such as the output voltage of the generator set 220 and the voltage of the AC bus 100).

[0046] In one possible implementation, the power generation module 200 has four modules.

[0047] In one possible implementation, such as Figure 1 As shown, there are two AC busbars 100; two generator modules 200 are electrically connected to one AC busbar 100, and the other two generator modules 200 are electrically connected to the other AC busbar 100. It should be noted that, to improve the precision of power distribution, two AC busbars 100 are configured. When all the generator modules 200 connected to one AC busbar 100 cannot meet the power requirements of the electrical equipment, the two AC busbars 100 are electrically connected to pool the power from all the generator modules 200 connected to both AC busbars 100, thus improving the overall power supply capacity. The two AC busbars 100 are electrically connected via two jumper switches.

[0048] In one possible implementation, it also includes: two auxiliary generators 400; the output of one auxiliary generator 400 is electrically connected to one of the AC buses 100 through an auxiliary circuit breaker 410; the output of the other auxiliary generator 400 is electrically connected to another AC bus 100 through another auxiliary circuit breaker 410; it should be noted that when the generator set 220 of the four power generation modules 200 fails and cannot start, the auxiliary generator 400 is required to provide power temporarily.

[0049] Furthermore, it also includes: an auxiliary control module; the generator controller 233 of the auxiliary control module is electrically connected to two auxiliary circuit breakers 410 to control the opening and closing of the two auxiliary circuit breakers 410, thereby controlling the activation of the auxiliary generator 400; at the same time, the generator controller 233 of the auxiliary control module is electrically connected to two jumper switches to control the opening and closing of the two jumper switches, thereby controlling the grid connection or disconnection of the two AC buses 100.

[0050] It should also be noted that this application has a priority order for the grid connection and disconnection of generator sets 220 of multiple power generation modules 200. When the AC bus 100 is in an undervoltage state, a higher priority diesel generator set 220 can be started first. If the higher priority generator set 220 fails or the AC bus 100 continues to be in an undervoltage state, the next higher priority diesel generator set 220 will be started. When the AC bus 100 is in an overvoltage state, the next higher priority diesel generator set 220 will be disconnected first. If the AC bus 100 continues to be in an overvoltage state, the higher priority generator set 220 will be disconnected.

[0051] Having described various embodiments of the application, it is to be understood that the above description is meant not to limit and not to encompass all of the possible embodiments. Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. It is intended that the scope of the application be defined by the scope of the patent and by the claims as allowed by the patent office, which can include adaptations based on the description, equivalents, and / or substitutions of elements individually or collectively to the entire disclosure.

Claims

1. A power management system for oil drilling rigs, characterized in that, include: Two or more power generation modules and AC busbars; Each of the power generation modules includes: a generator set, a circuit breaker, and a control module; the output terminal of the generator set is electrically connected to the AC bus via the circuit breaker, and the AC bus is suitable for electrical connection with the load; Each control module includes: a generator controller, a voltage regulator, and a speed controller; the voltage regulator is electrically connected to the excitation of the generator set to regulate the excitation voltage of the generator set, and the speed controller is electrically connected to the generator set to regulate the current speed of the generator set; The first input terminal of the generator controller is electrically connected to the output terminal of the generator set to acquire the output voltage of the generator set; the second input terminal of the generator controller is electrically connected to the output terminal of the speed controller to acquire the rotational speed of the generator set; the third input terminal of the generator controller is electrically connected to the AC bus to acquire the voltage of the AC bus. The output terminal of the generator controller is electrically connected to the closing coil of the circuit breaker to control the current on / off state of the circuit breaker.

2. The oil drilling rig power management system according to claim 1, characterized in that, The control module also includes a transformer T1; the input terminal of the transformer T1 is electrically connected to the three-phase output terminal of the generator set to collect the output voltage of the generator set, and the output terminal of the transformer T1 is electrically connected to the first input terminal of the generator controller.

3. The oil drilling rig power management system according to claim 1, characterized in that, The control module also includes a transformer T2; the input terminal of the transformer T2 is electrically connected to the three-phase output terminal of the generator set, and the output terminal of the transformer T2 is electrically connected to the voltage regulator to supply power to the voltage regulator.

4. The oil drilling rig power management system according to claim 1, characterized in that, It also includes a transformer T4; the input terminal of the transformer T4 is electrically connected to the AC bus to collect the voltage of the AC bus, and the output terminal of the transformer T4 is electrically connected to the third input terminal of the generator controller.

5. The oil drilling rig power management system according to any one of claims 1-4, characterized in that, There are four power generation modules in total.

6. The oil drilling rig power management system according to claim 5, characterized in that, The AC busbar is provided in two; Two of the power generation modules are electrically connected to one of the AC busbars; the other two power generation modules are electrically connected to the other AC busbar.

7. The oil drilling rig power management system according to claim 6, characterized in that, The two AC buses are electrically connected by two jumper switches.

8. The oil drilling rig power management system according to claim 1, characterized in that, The generator controller is model easYgen-2500.

9. The oil drilling rig power management system according to claim 1, characterized in that, The speed controller is model number 2301E.

10. The oil drilling rig power management system according to claim 3, characterized in that, The voltage regulator is model number DECS-100.

Images