A new type of distributed DC test device

Abstract

The present invention discloses a novel distributed direct current test device. The present invention adopts a distributed distribution, and various functional modules are dispersedly arranged near the device to be tested. Centralized management is performed through a management module, and the test of the direct current system can be completed without multiple test devices. The implementation is fast and convenient, and there is no need to build a complex test environment. At the same time, the present invention adopts an optical fiber interface, which can make full use of the sufficient spare optical fiber on site of the direct current system. The modules are easy to be distributed, which is more suitable for the characteristics of cross-floor and cross-interval arrangement of on-site devices, and is more lightweight and easy to implement.

Description

Technical Field

[0001] The invention relates to a novel distributed direct current test device, belonging to the technical field of ultra-high voltage direct current testing. Background Art

[0002] In recent years, more and more DC transmission projects have been put into operation. The reliable operation of DC protection systems is becoming increasingly important for ensuring the safe and stable operation of DC power grids.

[0003] Due to the complexity of the DC system, various protection devices are physically dispersed according to the system, and the interconnection between systems is mostly through optical fiber. During on-site acceptance, the entire system often needs to be verified. In this test mode, conventional AC sampling signals, conventional switching signals, optical fiber FT3 signals, and optical fiber Ethernet signals are applied at different locations at a long distance. Even if a single test device can output various types of data required by the DC control and protection device, it is obviously impossible to apply signals to devices at different locations at the same time, so multiple test devices are required to cooperate to complete it.

[0004] In order to meet the testing requirements of various control and protection devices of the DC system, the test device needs to integrate various modules such as high-power amplifier module, open input and output module, fiber optic FT3 module, fiber optic Ethernet module, management module, etc. According to conventional design, such test devices are often large and bulky, multiple test devices are not easy to carry, and the coordination between multiple devices requires the construction of a complex test environment. Summary of the invention

[0005] The invention provides a novel distributed direct current testing device, which solves the problems disclosed in the background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A new type of distributed DC test device, including a management module, a plurality of power amplifier modules, a plurality of input and output modules, a plurality of optical fiber Ethernet modules and a plurality of optical fiber FT3 modules;

[0008] All modules are arranged in a dispersed manner. The power amplifier modules, open input and output modules, fiber optic Ethernet modules and fiber optic FT3 modules are arranged near the corresponding devices under test and are connected to the corresponding devices under test respectively. The management module connects all power amplifier modules, open input and output modules, fiber optic Ethernet modules and fiber optic FT3 modules and is externally connected to a remote test host and / or a control device / protection device.

[0009] The management module is provided with a power interface, several network interfaces and several fiber optic control interfaces; among which, the power interface is connected to an independent AC / DC power supply, the network interface is connected to a remote test host and / or an external control device / protection device, and the fiber optic control interface of the management module is connected to the other modules one by one to realize the control of the other modules.

[0010] The power amplifier module is provided with a high-power power supply interface, a fiber optic control interface and several analog quantity interfaces. Among them, the high-power power supply interface is connected to an independent high-power AC and DC power supply, the fiber optic control interface of the power amplifier module is connected to the management module, and the analog quantity interface is connected to the corresponding device under test to apply analog quantity to the corresponding device under test.

[0011] The open-in / out module is provided with a power supply interface, a fiber optic control interface and several open-in / out interfaces, wherein the power supply interface is connected to an independent AC / DC power supply, the fiber optic control interface of the open-in / out module is connected to the management module, and the open-in / out interface is connected to the corresponding device under test to apply switching quantity to the corresponding device under test or obtain export action from the corresponding device under test.

[0012] The fiber optic Ethernet module is provided with a power interface, a fiber optic control interface and several fiber optic Ethernet transceiver interfaces, wherein the power interface is externally connected to an independent AC / DC power supply, the fiber optic control interface of the fiber optic Ethernet module is connected to the management module, and the fiber optic Ethernet transceiver interface is connected to the corresponding device under test to apply various required information to the corresponding device under test or obtain various message information from the corresponding device under test.

[0013] The optical fiber FT3 module is provided with a power interface, an optical fiber control interface and several optical fiber FT3 transceiver interfaces, wherein the power interface is connected to an independent AC / DC power supply, the optical fiber control interface of the optical fiber Ethernet module is connected to the management module, and the optical fiber FT3 transceiver interface is connected to the corresponding device under test to apply AC / DC analog quantity / switch logic quantity to the corresponding device under test or receive information from the device under test.

[0014] The beneficial effects achieved by the present invention are as follows: the present invention adopts a decentralized distribution, and various functional modules are dispersedly arranged near the device under test, and are centrally managed through a management module. The test of the DC system can be completed without multiple test devices, and the implementation is fast and convenient, and there is no need to build a complex test environment; at the same time, the present invention adopts an optical fiber interface, which can make full use of the sufficient spare optical fiber on site of the DC system, and the modules are easy to arrange in a decentralized manner, which is more suitable for the characteristics of cross-floor and cross-interval arrangement of on-site devices, and is more lightweight and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural block diagram of the present invention;

[0016] Figure 2 For the test scene graph. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0018] like Figure 1 As shown, a new type of distributed DC test device includes a management module, a plurality of power amplifier modules, a plurality of open-input and open-output modules, a plurality of optical fiber Ethernet modules and a plurality of optical fiber FT3 modules; all modules are dispersedly arranged, and each module is an independent device, wherein generally one management module is provided, and the number of the remaining modules is determined according to the number of devices under test.

[0019] The power amplifier module, the open input and output module, the fiber optic Ethernet module and the fiber optic FT3 module are respectively arranged near the corresponding devices under test and are respectively connected to the corresponding devices under test. The management module connects all the power amplifier modules, the open input and output modules, the fiber optic Ethernet module and the fiber optic FT3 modules, and is externally connected to a control device or a protection device.

[0020] The management module is provided with a power interface, several network interfaces and several optical fiber control interfaces; the network interface is an RJ45 network interface, which is used to connect to a remote test host or / and an external control device / protection device, obtain test cases from the remote test host, form a closed-loop test system with the control device or protection device, and receive protection event information of the device under test (in the form of a message); the power interface is connected to an independent AC / DC power supply; the optical fiber control interface of the management module is connected to the other modules one by one to realize the control of the other modules.

[0021] The power amplifier module is provided with a high-power power interface, a fiber optic control interface and several analog interfaces; among which, the high-power power interface is connected to an independent high-power AC and DC power supply; the fiber optic control interface of the power amplifier module is connected to the fiber optic control interface of the management module and is controlled by the management module; the analog interface is connected to the corresponding device under test, and the power amplifier module applies analog quantity to the corresponding device under test through the analog interface, which is used in scenarios where AC and analog quantity coordination is required during testing.

[0022] The open-in / out module is provided with a power interface, a fiber optic control interface and several open-in / out interfaces; wherein the power interface is externally connected to an independent AC / DC power supply; the fiber optic control interface of the open-in / out module is connected to the fiber optic control interface of the management module and is controlled by the management module; the open-in / out interface includes both the open-out interface and the open-in interface, the open-in / out interface is connected to the corresponding device under test, the open-in / out module applies a switching quantity to the corresponding device under test through the open-out interface in the open-in / out interface, and obtains the export action from the corresponding device under test through the open-in interface in the open-in / out interface.

[0023] The optical fiber Ethernet module is provided with a power interface, an optical fiber control interface and several optical fiber Ethernet transceiver interfaces; wherein the power interface is externally connected to an independent AC / DC power supply; the optical fiber control interface of the optical fiber Ethernet module is connected to the optical fiber control interface of the management module and is controlled by the management module; the optical fiber Ethernet transceiver interface includes both a sending interface and a receiving interface, and the optical fiber Ethernet transceiver interface is connected to the corresponding device under test. The optical fiber Ethernet module applies various required information to the corresponding device under test through the sending interface in the optical fiber Ethernet transceiver interface, and obtains various message information from the corresponding device under test through the receiving interface in the optical fiber Ethernet transceiver interface.

[0024] The optical fiber FT3 module is provided with a power interface, an optical fiber control interface and several optical fiber FT3 transceiver interfaces; among which, the power interface is externally connected to an independent AC / DC power supply; the optical fiber control interface of the optical fiber Ethernet module is connected to the optical fiber control interface of the management module and is controlled by the management module; the optical fiber FT3 transceiver interface includes both a sending interface and a receiving interface, and the optical fiber FT3 transceiver interface is connected to the corresponding device under test. The optical fiber FT3 module applies AC / DC analog quantity / switch logic quantity to the corresponding device under test through the sending interface in the optical fiber FT3 transceiver interface, and collects the information of the device under test through the receiving interface in the optical fiber FT3 transceiver interface.

[0025] All modules are powered separately, and all power interfaces can adopt the currently popular type-c usb interface, which is compatible with the power supply used in daily life and is easier to power.

[0026] Based on the received test cases, the management module sends corresponding test instructions to all the controlled power amplifier modules, input and output modules, fiber optic Ethernet modules and fiber optic FT3 modules. Each module applies the required digital quantities, analog quantities, switching quantities, etc. to the corresponding device under test according to the test instructions, and completes the test through the management plug-in module through synchronous output. After the test is completed, the monitoring message of the control device or protection device can be read through the RJ45 network interface of the management module, and the action status of the device can be obtained through the input and output module. Finally, a test report is formed to complete the test.

[0027] The DC system under test is a complex system, which includes various components, from the measurement interface panel at the sampling source to the DC protection panel, DC control panel and other distributed arrangements, and even across different floors in the station. Each device is interconnected by optical fiber. The overall system test not only tests the function of the system but also verifies the communication interconnection channel between systems. It is a more complete testing method. However, the dispersion and complexity of the system make it impossible for one test device to take into account the devices under test in various places. For example, if an analog value is applied to the measurement interface panel, the signal cannot be applied to the protection host at the same time, and the action output of the protection host cannot be connected to the test device. The distributed structure of the above-mentioned DC test device solves the above-mentioned problems well. Figure 2 As shown, the power amplifier module is independently powered and placed near the measurement interface screen to apply analog quantity to the conventional sampling merging unit, the optical fiber FT3 module applies digital analog quantity to the merging unit in the form of electronic / optical mutual inductor, and the open-in and open-out module can measure the switch quantity applied by the I / O device; on the DC protection screen, the protection host receives the signal from the measurement interface screen through the optical fiber, and at the same time receives the local optical fiber digital analog quantity applied by the optical fiber FT3 module and the optical fiber digital open input quantity applied by the optical fiber Ethernet module as needed, and obtains the protection action and other signals of the protection host through the optical fiber Ethernet module; synchronously, the three-out-of-two host receives the signal from the protection host, and its protection export signal is collected by the open-in and open-out module; the management module sends test data, controls the entire test process, obtains instructions and event message signals from the protection host, the three-out-of-two host, and the remote control host, and completes the system test process.

[0028] The present invention adopts a decentralized distribution, and various functional modules are dispersedly arranged near the device under test, and are centrally managed through a management module. The test of the DC system can be completed without multiple test devices. The implementation is fast and convenient, and there is no need to build a complex test environment. At the same time, the present invention adopts an optical fiber interface, which can make full use of the sufficient spare optical fiber on site of the DC system. The modules are easy to arrange in a decentralized manner, which is more suitable for the characteristics of cross-floor and cross-interval arrangement of on-site devices, and is more lightweight and easy to implement.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A new type of distributed DC test device, characterized in that: It includes a management module, several power amplifier modules, several input and output modules, several optical fiber Ethernet modules and several optical fiber FT3 modules; All modules are arranged in a dispersed manner. The power amplifier module, the open input and output module, the optical fiber Ethernet module and the optical fiber FT3 module are arranged near the corresponding devices under test and are connected to the corresponding devices under test respectively. The management module is connected to all the power amplifier modules, the open input and output modules, the optical fiber Ethernet module and the optical fiber FT3 module, and is externally connected to a remote test host or / and a control device / protection device; The management module is provided with a power interface, several network interfaces and several optical fiber control interfaces; wherein the power interface is externally connected to an independent AC / DC power supply, the network interface is externally connected to a remote test host or / and an external control device / protection device, and the optical fiber control interface of the management module is connected to the other modules one by one to realize the control of the other modules; The power amplifier module is provided with a high-power power interface, an optical fiber control interface and several analog quantity interfaces, wherein the high-power power interface is externally connected to an independent high-power AC and DC power supply, the optical fiber control interface of the power amplifier module is connected to the management module, and the analog quantity interface is connected to the corresponding device under test to apply analog quantity to the corresponding device under test; The input and output module is provided with a power supply interface, an optical fiber control interface and several input and output interfaces, wherein the power supply interface is externally connected to an independent AC and DC power supply, the optical fiber control interface of the input and output module is connected to the management module, and the input and output interface is connected to the corresponding device under test to apply a switch quantity to the corresponding device under test or obtain an export action from the corresponding device under test; The optical fiber Ethernet module is provided with a power supply interface, an optical fiber control interface and several optical fiber Ethernet transceiver interfaces, wherein the power supply interface is externally connected to an independent AC and DC power supply, the optical fiber control interface of the optical fiber Ethernet module is connected to the management module, and the optical fiber Ethernet transceiver interface is connected to the corresponding device under test to apply various required information to the corresponding device under test or obtain various message information from the corresponding device under test; The optical fiber FT3 module is provided with a power interface, an optical fiber control interface and several optical fiber FT3 transceiver interfaces, wherein the power interface is connected to an independent AC / DC power supply, the optical fiber control interface of the optical fiber Ethernet module is connected to the management module, and the optical fiber FT3 transceiver interface is connected to the corresponding device under test to apply AC / DC analog quantity / switch logic quantity to the corresponding device under test or receive information from the device under test.

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