Integrated fracturing command shelter intelligent power distribution system

Abstract

The utility model relates to the technical field of fracturing command shelters, and discloses an integrated fracturing command shelter intelligent power distribution system, which comprises a three-phase power taking circuit and a single-phase power taking circuit. The three-phase electricity taking circuit comprises three live wires for taking three-phase electricity and a null line connected with a neutral line, the three live wires and the null line form three independent electricity utilization loops respectively, the three live wires are connected with a first contactor used for controlling the three live wires to be conducted, the single-phase electricity taking circuit comprises a single-phase live wire, and the single-phase live wire is connected with a second contactor used for controlling the three live wires to be conducted. The single-phase live wire is divided into three single-phase live wires which are connected in parallel, the three single-phase live wires are firstly connected with a second contactor and then are respectively connected to the wire inlet sides of the three power utilization loops, one of the three power utilization loops is connected with an uninterruptible power supply in parallel, and the other one of the three power utilization loops is connected with a three-phase power taking circuit in parallel. And various power supply requirements of the fracturing command square cabin are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to fracturing command shelter technical field, concretely relates to an integrated fracturing command shelter intelligent power distribution system. BACKGROUND

[0002] Fracturing command shelter is an important operation command and control center in oil exploitation and natural gas development. Fracturing command shelter is usually deployed near the fracturing operation site to provide a high-efficiency and safe working environment for technical personnel and ensure the smooth progress of fracturing operation. With the continuous progress of fracturing operation technology and the expansion of operation scale, more equipment and command function systems are concentrated in the fracturing command shelter to form an integrated fracturing command shelter. The power consumption of the corresponding equipment is an important consideration in the design of the fracturing command shelter. SUMMARY

[0003] The utility model intends to provide an integrated fracturing command shelter intelligent power distribution system to solve how to ensure the multiple power supply requirements of the fracturing command shelter.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an integrated fracturing command shelter intelligent power distribution system, comprising a three-phase power taking circuit and a single-phase power taking circuit; the three-phase power taking circuit comprises three live wires for taking three-phase power and a zero line connected with a neutral line, the three live wires form three independent power consumption loops with the zero line respectively, a first contactor for controlling the conduction of the three live wires is connected to the three live wires, the single-phase power taking circuit comprises a single-phase live wire and a common zero line of the three-phase power taking circuit, the single-phase live wire is divided into three parallel single-phase live wires, the three single-phase live wires are connected to a second contactor and then connected to the line inlets of the three power consumption loops respectively, and an uninterruptible power supply is connected in parallel to one of the three power consumption loops.

[0005] The principle of the scheme is as follows: when three-phase power is used for power supply, the three-phase power taking circuit is connected with the three-phase power to make the normally open contact of the first contactor close, the three live wires of the three-phase power are used as the power consumption loops of the fracturing command shelter, and the power consumption equipment in the fracturing command shelter is connected to any one of the power consumption loops. When single-phase power is used for power supply, the single-phase power taking circuit is connected with the single-phase power, the single live wire in the single-phase power taking circuit is divided into three paths, and the three paths are connected to the three power consumption loops respectively, the three power consumption loops are powered at the same time when the second contactor is closed, and the equipment in the fracturing command shelter is powered. The uninterruptible power supply is connected in parallel to one of the three power consumption loops, the uninterruptible power supply is charged when the three-phase power taking circuit or the single-phase power taking circuit is used for power supply, and the control equipment for data transmission and signal processing in the fracturing command shelter is connected to the power consumption loop connected with the uninterruptible power supply.

[0006] The advantages of this scheme are: 1. This scheme enables the use of either three-phase electricity or single-phase electricity as the power source for the fracturing command cabin.

[0007] 2. In the single-phase power supply circuit, the single-phase power is split into three circuits of equal power through the control of the second relay, and the three power supply circuits built with the three-phase power supply are used to simultaneously supply power to the three power circuits of the fracturing command cabin.

[0008] 3. One of the three power circuits is connected to an uninterruptible power supply (UPS). When a three-phase or single-phase power supply is available, the UPS is charged. The control equipment in the fracturing command cabin that performs data transmission and signal processing is connected to the power circuit with the UPS. This ensures that important data is not lost and that the equipment connected to the UPS can continue to be used, thus ensuring the continuous power supply for the core functions of the fracturing command cabin.

[0009] Preferably, the uninterruptible power supply is further connected to a charging circuit, which includes an energy storage battery pack directly connected to the uninterruptible power supply, and a photovoltaic optimizer and a photovoltaic panel that are sequentially electrically connected to the uninterruptible power supply.

[0010] Its beneficial effects are: the uninterruptible power supply (UPS) is charged first through photovoltaic (PV) power, and the PV panels and PV optimizer MPPT connected in sequence charge the UPS. The energy storage battery pack is electrically connected to the UPS as a backup power source, thereby ensuring the continuity of the UPS power supply.

[0011] Preferably, a first surge protector is provided between the power supply terminal of the three-phase power supply circuit and the first contactor, and a second surge protector is provided between the power supply terminal of the single-phase power supply circuit and the second contactor.

[0012] Its beneficial effects are: by eliminating unstable voltages in the three-phase power supply circuit and the single-phase power supply circuit through the first surge protector and the second surge protector respectively, the power circuit of the command cabin is protected from damage by instantaneous high voltage.

[0013] Preferably, a first filter is provided between the power supply terminal of the three-phase power supply circuit and the first contactor, and a second filter is provided between the power supply terminal of the single-phase power supply circuit and the second contactor.

[0014] Its beneficial effects are: the first filter and the second filter respectively filter the irregular harmonic power in the three-phase power supply circuit and the single-phase power supply circuit, ensuring the voltage stability of the power circuit entering the fracturing command cabin.

[0015] Preferably, a third contactor is electrically connected between the second filter and the second contactor, and a single-phase power indicator light is connected in parallel between the second filter and the third contactor to indicate successful single-phase power supply. When the single-phase power supply circuit is connected, the single-phase power indicator light is directly energized, so that even if the power supply is not used temporarily, the operator can know that the single-phase power supply circuit has been successfully supplied with power.

[0016] Preferably, a three-phase power indicator light is directly connected between one of the live wires and the neutral wire in the three-phase power supply circuit to indicate that the three-phase power supply has been successfully obtained.

[0017] Preferably, the three-phase power supply circuit and the single-phase power supply circuit are respectively provided with interlocking circuits. The interlocking circuit on the three-phase power supply circuit includes a normally closed contact of a second contactor, a normally closed contact of a third contactor, and a coil of a first contactor connected in series. The interlocking circuit on the single-phase power supply circuit includes coils of a second contactor and a third contactor connected in parallel, and a normally closed contact of a first contactor connected to the parallel terminals of the second contactor and the third contactor.

[0018] The beneficial effects of this improvement are as follows: When three-phase power is used as the power source, upon connection of the three-phase power, since the normally closed contacts of the second and third contactors, as well as the coil of the first contactor, are connected to the power-taking terminals of the three-phase power, the coil of the first contactor is energized, the first contactor closes, and all three circuits of the three-phase power are connected, providing power to the fracturing command cabin. When single-phase power is used as the power source, if the three-phase power is not energized, the first contactor does not operate. The coils of the second and third contactors are connected in parallel and then connected to the normally closed contact of the first contactor. At this time, the second and third contactors are energized and closed, connecting the single-phase power-taking circuit to the power consumption circuit, providing power to the fracturing command cabin.

[0019] By interlocking the three-phase power supply circuit with the single-phase power supply circuit, it is possible to prevent current from flowing back from one power supply circuit to the other, which could damage the electrical components on the power supply circuit.

[0020] As an improvement, a circuit breaker is also provided on the incoming side of the three power circuits. This circuit breaker is used to disconnect the three power circuits simultaneously, thereby cutting off the power to all power circuits in the fracturing command cabin.

[0021] Preferably, the single-phase live wire in the single-phase power supply circuit is also directly connected to a live wire of the uninterruptible power supply in the three-phase power supply circuit. An undervoltage protection circuit is provided between the single-phase live wire and the neutral wire. The undervoltage protection circuit includes an undervoltage module directly connected in parallel between the live wire and the neutral wire. The undervoltage module drives the tripping mechanism of the circuit breaker to operate.

[0022] The undervoltage protection circuit is shared by the three-phase power supply circuit and the single-phase power supply circuit. When any power supply circuit experiences undervoltage, the undervoltage module detects the undervoltage and drives the circuit breaker to disconnect, thereby protecting the electrical equipment in the power supply circuit.

[0023] Preferably, an electric closing circuit is provided between the live wire and the neutral wire. The electric closing circuit includes an electric operating module and a circuit breaker for driving the circuit breaker to close and open. The electric operating module is used to drive the circuit breaker to operate.

[0024] When it is necessary to close or open the circuit breaker, the electric operating module controls the opening device to operate, and the opening device drives the circuit breaker to disconnect or connect. Attached Figure Description

[0025] Figure 1 The circuit diagram of the intelligent power distribution system for the fracturing command cabin. Detailed Implementation

[0026] The following detailed description illustrates the specific implementation method:

[0027] The three-phase power supply to the fracturing command cabin is a three-phase five-wire system, consisting of three live wires (power lines) L1 / L2 / L3, one neutral wire (N), and one grounding wire PE; the single-phase power supply consists of one live wire L, one neutral wire N, and one grounding wire PE.

[0028] As attached Figure 1 As shown, the integrated fracturing command cabin intelligent power distribution system includes a three-phase power supply circuit and a single-phase power supply circuit. The three-phase power supply circuit includes three live wires L1 / L2 / L3 for three-phase power supply and a neutral wire N connected to the neutral line. The three live wires L1 / L2 / L3 and the neutral wire N form three independent power circuits. A first contactor KM1 for controlling the conduction of the three live wires is connected to the three live wires L1 / L2 / L3. The single-phase power supply circuit includes a single-phase live wire L and a common neutral wire N with the three-phase power supply circuit. The single-phase live wire branches into three parallel single-phase live wires L. The three single-phase live wires L are first connected to the second contactor KM2 and then connected to the incoming line side of the three power circuits respectively. An uninterruptible power supply (UPS) is connected in parallel to one of the three power circuits.

[0029] A first surge protector (SPD1) is installed between the power supply terminal of the three-phase power supply circuit and the first contactor KM1, and a second surge protector (SPD2) is installed between the power supply terminal of the single-phase power supply circuit and the second contactor KM2. A first filter (EMI1) is installed between the power supply terminal of the three-phase power supply circuit and the first contactor KM1, and a second filter (EMI2) is installed between the power supply terminal of the single-phase power supply circuit and the second contactor KM2. The first filter (EMI1) and the second filter (EMI2) filter irregular harmonic energy appearing in the three-phase power supply circuit and the single-phase power supply circuit, respectively, to ensure the voltage stability of the power circuit entering the fracturing command cabin.

[0030] The incoming side of the three power circuits is also equipped with a circuit breaker QF1, which is used to disconnect the three power circuits at the same time, and to cut off the power to all power circuits of the fracturing command cabin.

[0031] The three-phase power supply circuit and the single-phase power supply circuit are respectively equipped with interlocking circuits. The interlocking circuit of the three-phase power supply circuit includes the normally closed contact of the second contactor KM2, the normally closed contact of the third contactor KM3, and the coil of the first contactor KM1 connected in series. The interlocking circuit of the single-phase power supply circuit includes the coils of the second contactor KM2 and the third contactor KM3 connected in parallel, and the normally closed contact of the first contactor KM1 connected to the parallel terminals of the second contactor KM2 and the third contactor KM3.

[0032] A third contactor KM3 is electrically connected between the second filter EMI2 and the second contactor KM2. A single-phase power indicator H2 is connected in parallel between the second filter EMI2 and the third contactor KM3 to indicate successful single-phase power supply. When the single-phase power supply circuit is activated, the single-phase power indicator H2 is directly energized, allowing the operator to know that the single-phase power supply circuit has been successfully activated even if the power supply is not in use.

[0033] A three-phase power indicator light H1 is directly connected between one of the live wires L3 and the neutral wire N in the three-phase power supply circuit to indicate that the three-phase power supply has been successfully obtained.

[0034] The uninterruptible power supply (UPS) also includes a charging circuit. This circuit comprises a battery pack directly connected to the UPS, and a photovoltaic optimizer and photovoltaic panels connected in sequence to the UPS. The UPS prioritizes charging via the photovoltaic system. The photovoltaic panels and the MPPT (Multi-Phase Power Controller) connected in sequence charge the UPS, while the battery pack serves as a backup power source, ensuring the continuity of the UPS's power supply.

[0035] The single-phase live wire L on the single-phase power supply circuit is also directly connected to a live wire L3 of the uninterruptible power supply (UPS) in the three-phase power supply circuit. An undervoltage protection circuit is provided between the single-phase live wire L and the neutral wire N. The undervoltage protection circuit includes an undervoltage module MN01 directly connected in parallel between the live wire L and the neutral wire N. The undervoltage module MN01 is an expansion module of the circuit breaker QF1. The undervoltage module adopts a Schneider PA33682 undervoltage module. The undervoltage module is connected to the tripping mechanism of the circuit breaker QF1 through a circuit connection. When an undervoltage is detected in the circuit, the tripping mechanism causes the circuit breaker QF1 to open, thereby cutting off the power to the main circuit.

[0036] An electric operating module MT100 is connected in parallel with the undervoltage module MN01. The electric operating module MT100 is connected to a tripping switch S14, which drives the circuit breaker to close and open. When it is necessary to close or open circuit breaker QF1, the electric operating module MT100 is operated to activate the tripping switch S14, which in turn causes circuit breaker QF1 to disconnect and reconnect. The electric operating module MT100 is a Schneider Electric module, model LV429434.

[0037] The circuit breaker used in this embodiment is a functionally expandable circuit breaker, specifically model C16N4TM160.

[0038] The operation of the intelligent power distribution system in this fracturing command cabin is as follows: When using three-phase power, the system connects to the three-phase power supply via a three-phase power supply circuit, closing the normally open contact of the first contactor KM1. This connects the three live wires L1 / L2 / L3 of the three-phase power supply as power circuits for the fracturing command cabin. Any electrical equipment within the fracturing command cabin can be connected to one of these power circuits. When using single-phase power, the system connects to the single-phase power supply circuit via a single-phase power supply circuit. The single live wire L in the single-phase power supply circuit is divided into three paths, and each of these three live wires L is connected to one of the three power circuits. When the second contactor KM2 closes, all three power circuits are simultaneously energized to power the equipment within the fracturing command cabin. An uninterruptible power supply (UPS) is connected in parallel to one of the three power circuits. When either a three-phase or single-phase power supply circuit is providing power, the UPS is charged. Control equipment within the fracturing command cabin used for data transmission and signal processing is connected to the power circuit connected to the UPS.

[0039] When three-phase power is used as the power source, when the three-phase power is connected, since the normally closed contacts of the second contactor KM2, the normally closed contacts of the third contactor KM3, and the coil of the first contactor KM1 are connected to the power source of the three-phase power, the coil of the first contactor KM1 is energized, the first contactor KM1 is closed, and all three circuits of the three-phase power are connected, providing power to the fracturing command cabin.

[0040] When single-phase power is used as the power source, and the three-phase power is not energized, the first contactor KM1 does not operate. The coils of the second contactor KM2 and the third contactor KM3 are connected in parallel and then connected to the normally closed contact of the first contactor KM1. At this time, the second contactor KM2 and the third contactor KM3 are energized and closed, so that the single-phase power supply circuit is connected to the power consumption circuit, providing power to the fracturing command cabin.

[0041] By interlocking the three-phase power supply circuit with the single-phase power supply circuit, it is possible to prevent current from flowing back from one power supply circuit to the other, which could damage the electrical components on the power supply circuit.

[0042] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An integrated intelligent power distribution system for fracturing command cabin, characterized in that: It includes a three-phase power supply circuit and a single-phase power supply circuit. The three-phase power supply circuit includes three live wires for drawing three-phase power and a neutral wire connected to the neutral wire. The three live wires and the neutral wire form three independent power circuits. A first contactor for controlling the conduction of the three live wires is connected to the three live wires. The single-phase power supply circuit includes a single-phase live wire and a common neutral wire with the three-phase power supply circuit. The single-phase live wire branches into three parallel single-phase live wires. The three single-phase live wires are first connected to a second contactor and then connected to the incoming side of the three power circuits respectively. An uninterruptible power supply is connected in parallel to one of the three power circuits.

2. The integrated fracturing command cabin intelligent power distribution system according to claim 1, characterized in that: The uninterruptible power supply is also connected to a charging circuit, which includes an energy storage battery pack directly connected to the uninterruptible power supply, and a photovoltaic optimizer and a photovoltaic panel that are sequentially electrically connected to the uninterruptible power supply.

3. The integrated fracturing command cabin intelligent power distribution system according to claim 2, characterized in that: A first surge protector is provided between the power supply terminal of the three-phase power supply circuit and the first contactor, and a second surge protector is provided between the power supply terminal of the single-phase power supply circuit and the second contactor.

4. The integrated fracturing command cabin intelligent power distribution system according to claim 3, characterized in that: A first filter is provided between the power supply terminal of the three-phase power supply circuit and the first contactor, and a second filter is provided between the power supply terminal of the single-phase power supply circuit and the second contactor.

5. The integrated fracturing command cabin intelligent power distribution system according to claim 4, characterized in that: A third contactor is electrically connected between the second filter and the second contactor. A single-phase power indicator is connected in parallel between the second filter and the third contactor to indicate that single-phase power is successfully supplied.

6. The integrated fracturing command cabin intelligent power distribution system according to claim 5, characterized in that: A three-phase power indicator light is directly connected between one of the live wires and the neutral wire in the three-phase power supply circuit to indicate that the three-phase power supply has been successfully obtained.

7. The integrated fracturing command cabin intelligent power distribution system according to claim 6, characterized in that: The three-phase power supply circuit and the single-phase power supply circuit are respectively equipped with interlocking circuits. The interlocking circuit of the three-phase power supply circuit includes a normally closed contact of a second contactor, a normally closed contact of a third contactor, and a coil of a first contactor connected in series. The interlocking circuit of the single-phase power supply circuit includes coils of a second contactor and a third contactor connected in parallel, and a normally closed contact of a first contactor connected to the parallel terminals of the second contactor and the third contactor.

8. The integrated fracturing command cabin intelligent power distribution system according to claim 7, characterized in that: The incoming side of each of the three power circuits is also equipped with a circuit breaker, which is used to disconnect the three power circuits simultaneously.

9. The integrated fracturing command cabin intelligent power distribution system according to claim 8, characterized in that: The single-phase live wire in the single-phase power supply circuit is also directly connected to a live wire in the three-phase power supply circuit that is connected to the uninterruptible power supply. An undervoltage protection circuit is provided between the single-phase live wire and the neutral wire. The undervoltage protection circuit includes an undervoltage module directly connected in parallel between the live wire and the neutral wire. The undervoltage module drives the tripping mechanism of the circuit breaker to operate.

10. The integrated fracturing command cabin intelligent power distribution system according to claim 8, characterized in that: An electric closing circuit is also provided between the live wire and the neutral wire. The electric closing circuit includes an electric operating module and a circuit breaker for driving the circuit breaker to close and open. The electric operating module is used to drive the circuit breaker to operate.

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