Modularized alternating-current power distribution device for electric workover rig and phase sequence adjusting method
By using modular AC power distribution devices and phase sequence adjustment methods, the problems of low wiring efficiency and incorrect wiring when electric well workover rigs are connected to three-phase power have been solved. Automatic detection and adjustment have been achieved to ensure correct power supply connection, thereby improving work efficiency and safety.
Patent Information
- Application Number
- CN202511001787.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-21
- Publication Date
- 2025-10-28
AI Technical Summary
When electric well-servicing rigs are connected to three-phase power, the wiring process is inefficient and prone to incorrect wiring, which can cause the equipment to malfunction and pose safety hazards.
Design a modular AC power distribution device, comprising a power distribution module and a phase sequence adjustment module, connected by high-voltage and low-voltage signal cables, to automatically detect and adjust the phase sequence of the three-phase power supply, ensuring correct power connection.
It simplifies the wiring process, improves work efficiency, avoids abnormal equipment operation and accidents caused by incorrect wiring, and ensures the normal operation of the electric well workover rig.
Smart Images
Figure CN120855421A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of electric workover rig technology, and in particular to a modular AC power distribution device and phase sequence adjustment method for electric workover rigs. Background Technology
[0002] Workover rigs are widely used in oilfield operations. Electric workover rigs, with their green, environmentally friendly, energy-efficient, and high-performance characteristics, have developed rapidly and are widely used in the petroleum industry. Electric workover rig operations rely heavily on electricity. Due to the nature of their operations, which often require relocation, the rig must be connected to a three-phase AC power supply before each use. A large workover rig often uses multiple three-phase electrical devices, requiring customers to connect multiple sets of three-phase power supplies. This process typically presents three problems: first, the wiring work is extensive and inefficient; second, some sites lack sufficient connection points, rendering the equipment unusable; and third, if the phase sequence is incorrect, the equipment will not function as designed after being powered on. In such cases, power must be disconnected, wiring replaced, and power restored repeatedly until the equipment is functioning correctly before work can begin, reducing efficiency and increasing the risk of accidents if problems are not detected promptly.
[0003] Therefore, it is necessary to statistically integrate the equipment that uses three-phase electricity in electric workover rigs and develop a modular power distribution device that has both phase sequence detection and automatic adjustment functions. Summary of the Invention
[0004] Purpose of the invention: The purpose of this invention is to provide a modular AC power distribution device and phase sequence adjustment method for electric workover rigs; to solve the problems of low work efficiency and accidents caused by incorrect wiring when connecting three-phase power at the work site of electric workover rigs.
[0005] Technical solution: The modular AC power distribution device for electric workover rigs described in this invention includes a power distribution module, a phase sequence adjustment module, a high-voltage cable, and a low-voltage signal cable; the low-voltage signal of the power distribution module is transmitted to the phase sequence adjustment module through the low-voltage signal cable, and the phase sequence adjustment module transmits the high-voltage signal to the power distribution module through the high-voltage cable.
[0006] Furthermore, the power distribution module includes a first relay, a second relay, a first thermal protector, a second thermal protector, a phase sequence protector, a first power input interface, a first power output interface, a second power output interface, a third power output interface, a fourth power output interface, and a first low-voltage signal interface.
[0007] Furthermore, the power distribution module is divided into five branches. The first branch is connected to the fourth power output interface through the first relay and the first thermal protector; the second branch is connected to the third power output interface through the second relay and the second thermal protector; the third branch is connected to the first low-voltage signal interface through the phase sequence protector; and the fourth and fifth branches are connected to the second power output interface and the first power output interface, respectively.
[0008] Furthermore, the first power output interface, the second power output interface, the third power output interface, and the fourth power output interface are pre-connected to the electrical equipment during well workover rig production.
[0009] Furthermore, the phase sequence adjustment module includes a third relay, a fourth relay, a first contactor, a second contactor, a 24V switching power supply, a controller, a second power input interface, a fifth power output interface, and a second low-voltage signal interface.
[0010] Furthermore, the 24V switching power supply connects the 24V power supply to the controller to power the controller.
[0011] Furthermore, the high-voltage cable is connected to the first power input interface and the fifth power output interface; the low-voltage signal cable is connected to the first low-voltage signal interface and the second low-voltage signal interface.
[0012] The modular AC power distribution phase sequence adjustment method for electric workover rigs described in this invention includes the following steps:
[0013] (1) After the second power input interface is powered on, the power is distributed to the third relay, the fourth relay, the 24V switching power supply, the first contactor, and the second contactor.
[0014] (2) After the first contactor closes, power is distributed to the fifth power output interface; after the second contactor closes, power is distributed to the fifth power output interface; after the fifth power output interface is energized, power is distributed to the first power input interface;
[0015] (3) After the first power input interface is powered on, the power is distributed to the first power output interface, the second power output interface, the first relay, the second relay, and the phase sequence protector; after the first relay is closed, it connects to the first thermal protector and distributes the power to the fourth power output interface; after the second relay is closed, it connects to the second thermal protector and distributes the power to the third power output interface.
[0016] (4) The low-voltage signal of the phase sequence protector is connected to the controller through the first low-voltage signal interface, the low-voltage signal cable, and the second low-voltage signal interface.
[0017] (5) When the user connects the cable to the power grid or the generator set is connected incorrectly, the phase sequence protector detects the phase sequence error and transmits the detection signal to the controller through the first low-voltage signal interface, the low-voltage signal cable and the second low-voltage signal interface. The controller processes the signal and issues an instruction to switch the phase sequence to ensure that the three-phase power supply phase sequence is correct.
[0018] Furthermore, in step (4), when the controller does not receive a phase sequence error signal, it controls the third relay to close, and after the third relay closes, it controls the first contactor to close. After the first contactor closes, the fifth power output interface outputs phase sequence 1.
[0019] Furthermore, in step (4), when the controller receives a phase sequence error signal, it controls the third relay to open and the fourth relay to close. After the fourth relay closes, it controls the second contactor to close. After the second contactor closes, the fifth power output interface outputs phase sequence 2.
[0020] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention saves the user's wiring time, and the user only needs to connect one set of cables to complete the power supply of the vehicle's electrical equipment; it avoids the problem of equipment not being usable due to insufficient power interfaces; the present invention can automatically switch phase sequence, saving the user the time of power outage and wiring replacement caused by incorrect wiring, improving efficiency, and also avoiding accidents caused by the user not detecting wiring errors in time and abnormal equipment operation. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the modular AC power distribution device of the present invention;
[0022] Figure 2 This is a circuit connection diagram of the modular AC power distribution device of the present invention;
[0023] Figure 3 This is a schematic diagram of the phase sequence adjustment method of the present invention. Detailed Implementation
[0024] The technical solution of the present invention will be further described below with reference to the accompanying drawings.
[0025] like Figure 1 As shown, the modular AC power distribution unit for the electric workover rig in this example includes a power distribution module, a high-voltage cable, a low-voltage signal cable, and a phase sequence adjustment module. The reference numerals are explained in the table below:
[0026] label name label name 01 Power distribution module KM1 First contactor 02 Phase sequence adjustment module KM2 Second contactor GL High voltage cable FR1 First thermal protector DL low voltage signal cable FR2 Second thermal protector K1 First relay PS 24V switching power supply K2 Second relay PSP Phase sequence protector K3 Third relay PLC controller K4 Fourth relay
[0027] like Figure 2As shown, the power distribution module includes a first relay, a second relay, a first thermal protector, a second thermal protector, a phase sequence protector, a first power input interface, a first power output interface, a second power output interface, a third power output interface, a fourth power output interface, and a first low-voltage signal interface.
[0028] The phase sequence adjustment module includes a third relay, a fourth relay, a first contactor, a second contactor, a 24V switching power supply, a controller, a second power input interface, a fifth power output interface, and a second low-voltage signal interface.
[0029] The high-voltage cable is connected to the first power input interface and the fifth power output interface.
[0030] The low-voltage signal cable is connected to the first low-voltage signal interface and the second low-voltage signal interface.
[0031] The first, second, third, and fourth power output interfaces are pre-connected to the electrical equipment during well workover rig production. Users only need to connect one end of a cable to the second power output interface and the other end to the power grid or a generator set or other equipment that can provide power.
[0032] When a user connects a cable to the power grid or a generator set incorrectly, the phase sequence protector can detect the phase sequence error and transmit the detection signal to the controller through the first low-voltage signal interface, the low-voltage signal cable, and the second low-voltage signal interface. The controller processes the signal and issues a command to switch the phase sequence, thereby ensuring that the three-phase power supply phase sequence is correct and the well workover rig can be powered on and operated normally.
[0033] A modular AC power distribution phase sequence adjustment method for electric workover rigs includes the following steps:
[0034] After the second power input interface is powered on, the power is distributed to the third relay, the fourth relay, the 24V switching power supply, the first contactor, and the second contactor.
[0035] After the first contactor closes, power is distributed to the fifth power output interface.
[0036] After the second contactor closes, power is distributed to the fifth power output interface.
[0037] After the fifth power output interface is powered on, it distributes power to the first power input interface.
[0038] After the first power input interface is powered on, the power is distributed to the first power output interface, the second power output interface, the first relay, the second relay, and the phase sequence protector.
[0039] After the first relay closes, it connects to the first thermal protector, distributing power to the fourth power output interface.
[0040] After the second relay closes, it connects to the second thermal protector, distributing power to the third power output interface.
[0041] The low-voltage signal of the phase sequence protector is connected to the controller through the first low-voltage signal interface, the low-voltage signal cable, and the second low-voltage signal interface.
[0042] like Figure 3 As shown, the 24V switching power supply connects the 24V power supply to the controller to power the controller.
[0043] When the controller does not receive a phase sequence error signal, it controls the third relay to close. After the third relay closes, it controls the first contactor to close. After the first contactor closes, the fifth power output interface outputs phase sequence 1.
[0044] When the controller receives a phase sequence error signal, it controls the third relay to open and the fourth relay to close. After the fourth relay closes, it controls the second contactor to close. After the second contactor closes, the fifth power output interface outputs phase sequence 2.
Claims
1. A modular AC power distribution device for an electric well workover rig, characterized in that, It includes a power distribution module, a phase sequence adjustment module, high-voltage cables, and low-voltage signal cables; the low-voltage signal from the power distribution module is transmitted to the phase sequence adjustment module through the low-voltage signal cable, and the phase sequence adjustment module transmits the high-voltage signal to the power distribution module through the high-voltage cable.
2. The modular AC power distribution device for an electric workover rig according to claim 1, characterized in that, The power distribution module includes a first relay, a second relay, a first thermal protector, a second thermal protector, a phase sequence protector, a first power input interface, a first power output interface, a second power output interface, a third power output interface, a fourth power output interface, and a first low-voltage signal interface.
3. The modular AC power distribution device for an electric workover rig according to claim 1, characterized in that, The power distribution module is divided into five branches. The first branch is connected to the fourth power output interface through the first relay and the first thermal protector. The second branch is connected to the third power output interface via the second relay and the second thermal protector. The third branch is connected to the first low-voltage signal interface through a phase sequence protector, and the fourth and fifth branches are connected to the second power output interface and the first power output interface, respectively.
4. The modular AC power distribution device for an electric well workover rig according to claim 2, characterized in that, The first power output interface, the second power output interface, the third power output interface, and the fourth power output interface are pre-connected to the electrical equipment during well workover rig production.
5. The modular AC power distribution device for an electric workover rig according to claim 1, characterized in that, The phase sequence adjustment module includes a third relay, a fourth relay, a first contactor, a second contactor, a 24V switching power supply, a controller, a second power input interface, a fifth power output interface, and a second low-voltage signal interface.
6. The modular AC power distribution device for an electric workover rig according to claim 5, characterized in that, The 24V switching power supply connects the 24V power supply to the controller, providing power to the controller.
7. The modular AC power distribution device for an electric workover rig according to claim 1, characterized in that, The high-voltage cable is connected to the first power input interface and the fifth power output interface; the low-voltage signal cable is connected to the first low-voltage signal interface and the second low-voltage signal interface.
8. A modular AC power distribution phase sequence adjustment method for electric well workover rigs, characterized in that, Includes the following steps: (1) After the second power input interface is powered on, the power is distributed to the third relay, the fourth relay, the 24V switching power supply, the first contactor, and the second contactor. (2) After the first contactor closes, the power is distributed to the fifth power output interface; After the second contactor closes, power is distributed to the fifth power output interface; After the fifth power output interface is powered on, it distributes power to the first power input interface; (3) After the first power input interface is powered on, the power is distributed to the first power output interface, the second power output interface, the first relay, the second relay, and the phase sequence protector; after the first relay is closed, it connects to the first thermal protector and distributes the power to the fourth power output interface; after the second relay is closed, it connects to the second thermal protector and distributes the power to the third power output interface. (4) The low-voltage signal of the phase sequence protector is connected to the controller through the first low-voltage signal interface, the low-voltage signal cable, and the second low-voltage signal interface. (5) When the user connects the cable to the power grid or the generator set is connected incorrectly, the phase sequence protector detects the phase sequence error and transmits the detection signal to the controller through the first low-voltage signal interface, the low-voltage signal cable and the second low-voltage signal interface. The controller processes the signal and issues an instruction to switch the phase sequence to ensure that the three-phase power supply phase sequence is correct.
9. The modular AC power distribution phase sequence adjustment method for electric workover rigs according to claim 8, characterized in that, In step (4), when the controller does not receive a phase sequence error signal, it controls the third relay to close. After the third relay closes, it controls the first contactor to close. After the first contactor closes, the fifth power output interface outputs phase sequence 1.
10. The modular AC power distribution phase sequence adjustment method for electric workover rigs according to claim 8, characterized in that, In step (4), when the controller receives a phase sequence error signal, it controls the third relay to open and the fourth relay to close. After the fourth relay closes, it controls the second contactor to close. After the second contactor closes, the fifth power output interface outputs phase sequence 2.