Signal sending device for frequency response test
By adding a satellite signal receiving module to the signal transmitting device of the new energy station, receiving satellite timing signals and providing unified time marks, the problem of difficulty in obtaining timing information in the prior art is solved, the efficiency of test data analysis is improved, and Supports transmission and frequency disturbance simulation of AGC power control instructions.
Patent Information
- Application Number
- CN202421231347.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The signal sending device for the fast frequency response test of existing new energy stations is difficult to obtain time-sensitive information, which makes it difficult to analyze the test results.
A satellite signal receiving module is added to the signal transmitting device, and a unified time scale is provided to the device by receiving the satellite timing signals. The main control module generates signals required for frequency response test based on the time scale provided by the clock module.
It significantly improves the efficiency of test data analysis, solves the problem of difficulty in obtaining time-based information, provides a unified time scale system, and supports the transmission of AGC power control instructions and the simulation of frequency disturbances in the power system.
Smart Images
Figure CN222461925U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of new energy frequency response testing, and in particular relates to a signal sending device for frequency response testing. Background Art
[0002] At present, with the continuous maturity of new energy technology and the continuous reduction of costs, the scale and number of new energy stations are also expanding. For the rapid frequency response grid access test of new energy stations, a tester that adapts to various wiring methods on the project site, based on the same time section event analysis, and efficiently conducts "AGC coordinated control" tests is the requirement of on-site test personnel and the requirement to ensure the quality of new energy projects.
[0003] Most of the existing signal sending devices for rapid frequency response testing of new energy stations add software modules such as frequency step disturbance, actual grid frequency disturbance, and voltage ride-through to traditional relay protection testers.
[0004] Existing testers generally only have optical B-code and electrical B-code timing interfaces. Due to the complex on-site test conditions of new energy stations, it is difficult to obtain timing information, but a unified event time scale for the entire station is critical to the analysis of test results.
[0005] Existing testers are generally equipped with only one Ethernet port for connecting to the host computer test software. They do not support the sending of AGC power control instructions. There is a problem that the logic of positively superimposing the AGC power adjustment instruction and reversely blocking the AGC power adjustment instruction during a frequency modulation action is difficult to verify. Utility Model Content
[0006] The utility model aims to provide a signal sending device for frequency response testing, so as to solve the technical problem of difficulty in obtaining timing information in the prior art.
[0007] In order to solve the above technical problems, the utility model provides a technical solution for a signal sending device for frequency response testing: a signal sending device for frequency response testing, including a main control module and a clock module, and also including a satellite signal receiving module, the satellite signal receiving module is used to receive a satellite timing signal and send it to the clock module, the clock module provides a unified time scale for the device through the received satellite timing signal, and the main control module generates a signal required for the frequency response test based on the time scale provided by the clock module.
[0008] The beneficial effects of the utility model are as follows: the technical solution of a signal sending device for frequency response testing of the utility model belongs to an improved invention. The utility model adds a satellite signal receiving module to the hardware, receives the satellite timing signal through the satellite signal receiving module to provide a time scale for the device, provides a unified section time scale for data analysis during testing, and can significantly improve the efficiency of test data analysis. It solves the technical problem of difficulty in obtaining timing information in the prior art.
[0009] Furthermore, the satellite signal receiving module is a GPS or Beidou receiving module, and the satellite timing signal is a GPS or Beidou timing signal corresponding to the satellite signal receiving module.
[0010] Furthermore, at least two groups of output voltage interfaces are included.
[0011] Furthermore, the frequency, amplitude and phase change of the output voltage of each group of output voltage interfaces are independently set.
[0012] Furthermore, it also includes at least two Ethernet ports, at least one of which is used to send ACG power control instructions.
[0013] Furthermore, it includes two optical Ethernet ports and one electrical Ethernet port.
[0014] Furthermore, at least one Ethernet port is used to access IEC61588 or SNTP network timing signal. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a product design diagram of an embodiment of a signal sending device for frequency response testing of the utility model;
[0016] Figure 2 A voltage output interface circuit diagram of an embodiment of a signal sending device for frequency response testing of the utility model;
[0017] Figure 3 This is an Ethernet port circuit diagram of an embodiment of a signal sending device for frequency response testing of the utility model;
[0018] Figure 4 The present invention is a circuit diagram of a GPS / Beidou antenna interface according to an embodiment of a signal sending device for frequency response testing.
[0019] In the figure: 1. First voltage output interface; 2. Second voltage output interface; 3. Electrical Ethernet port; 4. Optical Ethernet port; 5. GPS / Beidou antenna interface. DETAILED DESCRIPTION
[0020] The existing tester for the rapid frequency response test of new energy stations is only equipped with an optical B code or electrical B code timing interface, and the reliability of the timing signal is low, making it difficult for the tester to obtain timing information on site. The utility model adds a satellite signal receiving module to the hardware, and receives the satellite timing signal through the satellite signal receiving module to provide a time scale for the device. During the test, a unified section time scale is provided for data analysis, which can significantly improve the efficiency of test data analysis. The technical problem of difficulty in obtaining timing information in the existing technology is solved.
[0021] Embodiment of a signal sending device for frequency response testing:
[0022] The signal sending device for frequency response test in this embodiment is as follows: Figure 1 As shown, it includes two groups of voltage output interfaces, namely a first voltage output interface 1 and a second voltage output interface 2, and also includes an electrical Ethernet port 3, two optical Ethernet ports 4 and a satellite signal receiving module for receiving satellite timing signals. The satellite signal receiving module sends the received satellite timing signal to the clock module, and the clock module provides a unified time scale for the device through the satellite timing signal. The main control module generates the signal required for the frequency response test based on the time scale provided by the clock module.
[0023] Specifically, the satellite signal receiving module of this embodiment is a GPS or Beidou receiving module, and correspondingly, the satellite timing signal is a GPS or Beidou timing signal.
[0024] This embodiment has two sets of voltage output interfaces, which can meet the application scenario where the new energy power generation power is transmitted through two transformers, and the primary frequency modulation device of the new energy station needs to be connected to the voltage of two grid connection points. In addition, the frequency, amplitude, and phase changes of the two sets of voltage output interfaces can be set independently. The circuit schematic diagram of the voltage output interface is shown in Figure 2 As shown, this part belongs to the prior art and will not be described in detail here.
[0025] This embodiment has three Ethernet ports, including one electrical Ethernet port 3 and two optical Ethernet ports 4. Among them, the electrical Ethernet port 3 is used to connect to the host computer test software; one optical Ethernet port 4 is used to send ACG power control instructions. In this embodiment, the signal sending device can simulate AGC power regulation and power system frequency disturbance under the same time scale system, and support timing control. It greatly improves the test efficiency of the logic of positive superposition of AGC power regulation instructions and reverse locking of AGC power regulation instructions during a frequency modulation action. The circuit schematic diagram of each Ethernet interface is shown in the figure. Figure 3 As shown, this part belongs to the prior art and will not be described in detail here.
[0026] In other implementations, an optical Ethernet port may be used to connect to the host computer test software.
[0027] The GPS or Beidou receiving module of this embodiment receives the GPS or Beidou timing signal through the GPS / Beidou antenna interface 5. Another optical Ethernet port 4 of this embodiment is used to access the IEC61588 or SNTP network timing signal. This embodiment supports both IEC61588 or SNTP network timing access and GPS / Beidou timing signal access. It can meet the needs of obtaining timing information in complex test environments at new energy engineering sites, provide a unified cross-section time scale for data analysis during testing, and significantly improve the efficiency of test data analysis. The GPS / Beidou antenna interface circuit diagram is shown in FIG. Figure 4 Shown
[0028] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A signal sending device for frequency response testing, comprising a main control module and a clock module, characterized in that: It also includes a satellite signal receiving module, which is used to receive satellite timing signals and send them to a clock module. The clock module provides a unified time scale for the device through the received satellite timing signals. The main control module generates the signal required for the frequency response test based on the time scale provided by the clock module.
2. The signal sending device for frequency response testing according to claim 1, characterized in that: The satellite signal receiving module is a GPS or Beidou receiving module, and the satellite timing signal is a GPS or Beidou timing signal corresponding to the satellite signal receiving module.
3. The signal sending device for frequency response testing according to claim 1, characterized in that: It also includes at least two groups of output voltage interfaces.
4. The signal sending device for frequency response testing according to claim 3, characterized in that: The frequency, amplitude and phase change of the output voltage of each group of output voltage interfaces are independently set.
5. The signal sending device for frequency response testing according to claim 1, characterized in that: It also includes at least two Ethernet ports, at least one of which is used to send ACG power control instructions.
6. The signal sending device for frequency response testing according to claim 5, characterized in that: Includes two optical Ethernet ports and one electrical Ethernet port.
7. The signal sending device for frequency response testing according to claim 5 or 6, characterized in that: At least one Ethernet port is used to access the IEC61588 or SNTP network timing signal.