Marine power system testing device

Abstract

The application discloses a kind of ship power system testing device, including sensor unit, data acquisition unit and data processing unit;Sensor unit includes voltage sensor and current sensor for detecting voltage and current at power supply and distribution equipment measuring point, linear power supply for providing isolation power supply for voltage sensor and current sensor, rotational speed sensor for detecting power unit equipment rotational speed, voltage sensor and current sensor are installed in sensor cabinet, sensor cabinet is electromagnetically shielded and grounded;Data acquisition unit includes signal conditioner electrically connected with sensor, signal collector electrically connected with signal conditioner, signal conditioner and signal collector are installed in acquisition cabinet and are powered by switch power supply in acquisition cabinet, acquisition cabinet is electromagnetically shielded and grounded;Data processing unit includes switch electrically connected with signal collector, host computer electrically connected with switch.The device can avoid external power supply and the interference of electromagnetic environment on ship, and has high precision.

Description

Technical Field

[0001] This utility model relates to ship power systems, and more specifically to a ship power system testing device. Background Technology

[0002] The ship's electrical system is a crucial system in a ship, and its performance has a direct and critical impact on the ship. In order to comprehensively verify the stability, coordination, and compatibility of the ship's electrical system operation, and to understand the extreme operating conditions, boundary conditions, and ultimate tolerance performance of the ship's electrical system, it is necessary to test the ship's electrical system.

[0003] Currently, when testing ship electrical systems, the placement of electronic components is subject to interference not only from the power supply but also from the ship's electromagnetic environment, affecting the accuracy of the tests. Utility Model Content

[0004] The purpose of this invention is to provide a ship electrical system testing device that can test the ship's electrical system, avoid interference from external power supply and the ship's electromagnetic environment, and achieve high testing accuracy.

[0005] The technical solution adopted in this utility model is: A shipboard power system testing device includes a sensor unit, a data acquisition unit, and a data processing unit. The sensor unit includes a voltage sensor and a current sensor for detecting voltage and current at measurement points of power supply and distribution equipment; a linear power supply providing isolation power to the voltage and current sensors; and a speed sensor for detecting the rotational speed of the power unit equipment. The voltage and current sensors are installed in a sensor cabinet, which is electromagnetically shielded and grounded. The data acquisition unit includes a signal conditioner electrically connected to the corresponding sensor and a signal acquisition unit electrically connected to the signal conditioner. The signal conditioner and signal acquisition unit are installed in an acquisition cabinet and powered by a switching power supply within the acquisition cabinet. The acquisition cabinet is electromagnetically shielded and grounded. The data processing unit includes a switch electrically connected to each signal acquisition unit and a host computer electrically connected to the switch.

[0006] Preferably, the sensor cabinet is equipped with a grounding bar, a sensor cabinet power interface for connecting a linear power supply, a sensor cabinet power switch and indicator lights. The sensor cabinet power interface is connected to the voltage sensor and the current sensor through the internal wiring of the sensor cabinet. The sensor cabinet power switch and indicator lights are located on the external panel of the sensor cabinet.

[0007] Preferably, the sensor cabinet is installed near the measuring points of the power supply and distribution equipment.

[0008] Preferably, each sensor cabinet is divided into medium-voltage sensor cabinet and low-voltage sensor cabinet according to the voltage level of the power supply and distribution equipment.

[0009] Preferably, the data acquisition cabinet is equipped with a grounding bar, a data acquisition cabinet power interface for connecting to an external power source, a data acquisition cabinet power supply switch and indicator lights. The data acquisition cabinet power supply interface is electrically connected to the input terminal of the switching power supply through the internal wiring of the data acquisition cabinet. The data acquisition cabinet power supply switch and indicator lights are located on the external panel of the data acquisition cabinet.

[0010] Preferably, the data collection cabinet is equipped with a temperature control device, which is powered by a switching power supply.

[0011] Preferably, the signal cables inside the data acquisition cabinet, as well as the signal cables connecting to and disconnecting from the data acquisition cabinet, are all high-density shielded cables and are all kept away from high-power cable trays.

[0012] Preferably, the data processing unit further includes a server, which is electrically connected to the switch.

[0013] Preferably, the data processing unit further includes a storage module for data storage and retrieval, and the host computer is electrically connected to the storage module.

[0014] Preferably, the storage module is a disk array.

[0015] The beneficial effects of this utility model are: This device can detect data from key equipment in a ship's electrical system using sensor units, collect the sensor data using a data acquisition unit, and process the data using a data processing unit. Therefore, it can test the ship's electrical system. Crucially, the voltage and current sensors use linear power supplies, while the signal conditioner and signal acquisition unit use switching power supplies. This power isolation design avoids interference from external power supplies, improving detection and acquisition accuracy. Furthermore, the voltage and current sensors are installed in a sensor cabinet, and the signal conditioner and signal acquisition unit are installed in an acquisition cabinet, providing protection. Both the sensor and acquisition cabinets are electromagnetically shielded and grounded, preventing interference from the ship's electromagnetic environment to precision electronic components, thus ensuring high testing accuracy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the ship power system testing device in an embodiment of this utility model. Detailed Implementation

[0017] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0018] This application discloses a testing device for a ship's electrical system, comprising a sensor unit, a data acquisition unit, and a data processing unit; wherein, as shown in the figure... Figure 1As shown: The sensor unit includes a voltage sensor, a current sensor, a speed sensor, a linear power supply, and a sensor cabinet. The voltage sensor is used to detect the voltage at the measuring point of the power supply and distribution equipment; the current sensor is used to detect the current at the measuring point of the power supply and distribution equipment; the speed sensor is used to detect the speed of the power unit equipment; the linear power supply provides isolation power to the voltage and current sensors; the voltage and current sensors are installed in the sensor cabinet, which has electromagnetic shielding and is grounded; the data acquisition unit includes a signal conditioner, a signal collector, a switching power supply, and an acquisition cabinet. The signal conditioner is electrically connected to the corresponding sensor, and the signal collector is electrically connected to the signal conditioner. The signal conditioner, signal collector, and switching power supply are installed in the acquisition cabinet, which is powered by the switching power supply. The acquisition cabinet has electromagnetic shielding and is grounded; the data processing unit includes a switch and a host computer. The switch is electrically connected to each signal collector, and the host computer is electrically connected to the switch.

[0019] During operation, voltage sensors detect voltage at the power supply and distribution equipment measuring points, current sensors detect current at the power supply and distribution equipment measuring points, and speed sensors detect the speed of the power unit equipment. Each sensor transmits the detected signals to a signal conditioner, which conditions the signals to convert them into signals that can be collected by a signal acquisition device. The signal acquisition device synchronously collects the signals output by each signal conditioner and transmits them to a switch. The switch centrally forwards the signals output by each signal acquisition device to a host computer, which is used for data display, real-time analysis, offline analysis, and test configuration.

[0020] This device can detect data from key equipment in a ship's electrical system using sensor units, collect the sensor data using a data acquisition unit, and process the data using a data processing unit. Therefore, it can test the ship's electrical system. Crucially, the voltage and current sensors use linear power supplies, while the signal conditioner and signal acquisition unit use switching power supplies. This power isolation design avoids interference from external power supplies, improving detection and acquisition accuracy. Furthermore, the voltage and current sensors are installed in a sensor cabinet, and the signal conditioner and signal acquisition unit are installed in an acquisition cabinet, providing protection. Both the sensor and acquisition cabinets are electromagnetically shielded and grounded, preventing interference from the ship's electromagnetic environment to precision electronic components, thus ensuring high testing accuracy.

[0021] Regarding the sensor unit, in this embodiment: like Figure 1 As shown, preferably, the sensor cabinet is equipped with a grounding bar, a sensor cabinet power interface for connecting a linear power supply, a sensor cabinet power switch and indicator lights. The sensor cabinet power interface is connected to the voltage sensor and the current sensor through the internal wiring of the sensor cabinet. The sensor cabinet power switch and indicator lights are located on the external panel of the sensor cabinet.

[0022] Preferably, the sensor cabinet is installed near the measuring points of the power supply and distribution equipment.

[0023] Preferably, each sensor cabinet is divided into medium-voltage sensor cabinet and low-voltage sensor cabinet according to the voltage level of the power supply and distribution equipment.

[0024] Regarding the data acquisition unit, in this embodiment: like Figure 1 As shown, preferably, the data acquisition cabinet is equipped with a grounding bar, a data acquisition cabinet power interface for connecting to an external power source, a data acquisition cabinet power supply switch and indicator lights. The data acquisition cabinet power supply interface is electrically connected to the input terminal of the switching power supply through the internal wiring of the data acquisition cabinet. The data acquisition cabinet power supply switch and indicator lights are located on the external panel of the data acquisition cabinet.

[0025] like Figure 1 As shown, preferably, the data collection cabinet is equipped with a temperature control device (such as a cooling air conditioner and a cooling fan), which is powered by a switching power supply.

[0026] Preferably, the signal cables inside the data acquisition cabinet, as well as the signal cables connecting to and disconnecting from the data acquisition cabinet, are all high-density shielded cables and are all kept away from high-power cable trays.

[0027] Preferably, the signal acquisition unit includes a controller, a synchronization control board, a data acquisition board, and a conditioning expansion board. The controller runs a real-time operating system to preprocess, package, and transmit the acquired data. The synchronization control board includes an output port and an input port for the sampling clock. The data acquisition board includes differential acquisition channels, channel filtering circuits, and inter-channel isolation circuits. The conditioning expansion board integrates sampling resistors and necessary protection circuits. The signal acquisition unit ensures the synchronization of all electrical signals acquired on-site.

[0028] Regarding the data processing unit, in this embodiment: like Figure 1 As shown, preferably, the data processing unit further includes a server, which is electrically connected to the switch. The data server is used to receive data from the switch and data from the field monitoring system.

[0029] like Figure 1 As shown, preferably, the data processing unit further includes a storage module for data storage and retrieval, the host computer is electrically connected to the storage module, and the storage module is preferably a disk array.

[0030] This device can perform various characteristic tests and experiments on key equipment of ship power systems. It can test parameters such as speed, RMS voltage, RMS voltage fundamental frequency, RMS current, RMS current fundamental frequency, fundamental power, apparent power, active power, reactive power, and power factor at specified measurement points. It can also perform single-unit recovery performance tests, startup characteristic tests, response characteristic tests, and system operation tests on key equipment of ship power systems. This comprehensively verifies the stability, coordination, and matching of ship power system operation, and clarifies the extreme operating conditions, boundary conditions, and ultimate tolerance performance of ship power systems. After testing by this device, we will accelerate and deepen our understanding of the performance of newly developed ship power system equipment, promote the optimization and improvement of key equipment such as generator sets, switchboards, and transformers in ship power systems, and provide strong technical support and guarantee for the onboarding of ship power system equipment and its promotion and application in the industry.

[0031] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A testing device for a ship's electrical system, characterized in that: It includes a sensor unit, a data acquisition unit, and a data processing unit. The sensor unit includes voltage sensors and current sensors for detecting voltage and current at measurement points of power supply and distribution equipment, a linear power supply providing isolation power to the voltage and current sensors, and a speed sensor for detecting the rotational speed of power generation equipment. The voltage and current sensors are installed in a sensor cabinet, which is electromagnetically shielded and grounded. The data acquisition unit includes a signal conditioner electrically connected to the corresponding sensor and a signal collector electrically connected to the signal conditioner. The signal conditioner and signal collector are installed in an acquisition cabinet and powered by a switching power supply inside the acquisition cabinet. The acquisition cabinet is electromagnetically shielded and grounded. The data processing unit includes a switch electrically connected to each signal collector and a host computer electrically connected to the switch.

2. The ship electrical system testing device as described in claim 1, characterized in that: The sensor cabinet is equipped with a grounding bar, a sensor cabinet power interface for connecting a linear power supply, a sensor cabinet power switch and indicator lights. The sensor cabinet power interface is connected to the voltage sensor and current sensor through the internal wiring of the sensor cabinet. The sensor cabinet power switch and indicator lights are located on the external panel of the sensor cabinet.

3. The ship electrical system testing device as described in claim 1, characterized in that: The sensor cabinet is installed near the measuring points of the power supply and distribution equipment.

4. The ship electrical system testing device as described in claim 3, characterized in that: Each sensor cabinet is divided into medium-voltage sensor cabinets and low-voltage sensor cabinets according to the voltage level of the power supply and distribution equipment.

5. The ship electrical system testing device as described in claim 1, characterized in that: The data acquisition cabinet is equipped with a grounding bar, a power interface for connecting to an external power source, a power switch and indicator lights. The power interface is electrically connected to the input terminal of the switching power supply through the internal wiring of the data acquisition cabinet. The power switch and indicator lights are located on the external panel of the data acquisition cabinet.

6. The ship electrical system testing device as described in claim 1, characterized in that: The data collection cabinet is equipped with a temperature control device, which is powered by a switching power supply.

7. The ship electrical system testing device as described in claim 1, characterized in that: The signal cables inside the data acquisition cabinet, as well as the signal cables connecting to and disconnecting from the data acquisition cabinet, are all high-density shielded cables and are all kept away from high-voltage, high-power cable trays.

8. The ship electrical system testing device as described in claim 1, characterized in that: The data processing unit also includes a server, which is electrically connected to the switch.

9. The ship electrical system testing device as described in claim 1, characterized in that: The data processing unit also includes a storage module for data storage and retrieval, and the host computer is electrically connected to the storage module.

10. The ship electrical system testing device as described in claim 9, characterized in that: The storage module uses a disk array.

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