Intelligent measuring device for electrical parameters of unmanned power station

Abstract

The utility model provides an intelligent measuring device for electrical parameters of an unmanned power station, which relates to the technical field of power measuring devices and comprises a data processing module, a data acquisition module, an AD (analog-to-digital) conversion module, a CPU (central processing unit) plug-in, a communication module, an output loop, an analog quantity output module and an MMI (man-machine interface) board. The data acquisition module is connected with the AD conversion module; the AD conversion module is also connected with the data processing module; the data processing module is also connected with the communication module and the analog quantity output module; the communication module is used for communicating with external equipment and transmitting electrical parameters; the MMI board comprises an indicating lamp, a liquid crystal and a keyboard, is connected with the data processing module through a CPU (Central Processing Unit) plug-in, and is used for man-machine interaction and equipment control; the analog quantity output module is also externally connected with a generator set speed regulator; and the output loop is externally connected with a generator set. The beneficial effects of the utility model are that power signals or frequency signals can be output in four paths of 4-20mA, electrical parameters calculated by the device can be output in a communication mode, and the precision and stability of measurement can be improved.

Description

Technical Field

[0001] This utility model relates to the field of power measurement device technology, and in particular to an intelligent measurement device for electrical parameters of an unmanned power station. Background Technology

[0002] Power systems typically contain a large number of interference harmonics, which severely reduces the accuracy of grid frequency and generator power measurement and affects the efficiency of grid dispatching. Summary of the Invention

[0003] To address the problems mentioned above in the background technology, this utility model provides an intelligent measuring device for electrical parameters of unmanned power stations. This device can calculate electrical quantities based on collected data and output selected electrical quantities using communication and wire-based analog output methods, thereby improving the accuracy and stability of the measurement.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an intelligent measurement device for electrical parameters of an unmanned power station, comprising: a data processing module, a data acquisition module, an AD conversion module, a CPU plug-in, a communication module, an output circuit, an analog output module, and an MMI board;

[0005] The data acquisition module, connected to the AD conversion module, is used to acquire electrical data and send the acquired data to the AD conversion module.

[0006] The AD conversion module is also connected to the data processing module, which converts the received data from analog signals to digital signals and then sends the data to the data processing module.

[0007] The data processing module is also connected to the communication module and the analog output module to process and calculate the data, obtain electrical parameters, and temporarily store them.

[0008] The communication module communicates with external devices and sends parameters such as voltage, current, and power factor calculated by the data processing module to the external devices.

[0009] The MMI board includes indicator lights, an LCD screen, and a keyboard. It is connected to the data processing module via a CPU plug-in and is used for human interaction and device control.

[0010] An external circuit is opened to connect to an external generator set for regulating the generator set's power.

[0011] The analog output module is also connected to an external generator speed governor, which is used to send the frequency and power parameters calculated by the data processing module to the generator speed governor.

[0012] Furthermore, the data acquisition module is an AC plug-in, specifically the PSL623C manufactured by NARI Group Corporation.

[0013] Furthermore, the data processing module includes: a control processing unit and a storage unit;

[0014] The control processing unit uses an ARM processor, specifically a Cortex-M4, for issuing control instructions and processing data.

[0015] Storage units, including EEPROM, SRAM, and FLASH, are used for data storage.

[0016] Furthermore, the electrical data acquired by the data acquisition module includes: three-phase voltage data of the voltage transformer, three-phase current data of the current transformer, and zero-sequence voltage data of the voltage transformer.

[0017] Furthermore, the communication module (5) communicates with external devices using a wireless network.

[0018] Furthermore, the analog output module outputs fundamental power signals and frequency signals using four channels of 4-20mA current.

[0019] Furthermore, the MMI board is selected from the MMI270M3-1 display control board of Hongxun Company.

[0020] Furthermore, the output circuit (6) includes: an optocoupler, a drive circuit, and an output relay.

[0021] Furthermore, the external device is a SCADA system used to achieve parameter visualization and monitoring.

[0022] Beneficial effects: This utility model can output selectable fundamental power or frequency signals with 4 channels of 4-20mA current, and output parameters such as voltage, current and power factor calculated by selectable measuring devices in a communication manner, thereby improving the accuracy and stability of measurement. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] In the diagram, 1-data processing module, 2-data acquisition module, 3-AD conversion module, 4-CPU plug-in, 5-communication module, 6-output circuit, 7-analog output module, and 8-MMI board. Detailed Implementation

[0026] like Figure 1As shown, an intelligent measurement device for electrical parameters of an unmanned power station includes: a data processing module 1, a data acquisition module 2, an AD conversion module 3, a CPU plug-in 4, a communication module 5, an output circuit 6, an analog output module 7, and an MMI board 8.

[0027] Data acquisition module 2 uses the PSL623C AC plug-in manufactured by NARI Group Corporation, which is connected to the AD conversion module to collect electrical data including three-phase voltage data of voltage transformers, three-phase current data of current transformers, and zero-sequence voltage data of voltage transformers, and sends the collected data to the AD conversion module.

[0028] The AD conversion module 3 is also connected to the data processing module 1, which converts the received data from analog signals to digital signals and then sends the data to the data processing module 1.

[0029] The data processing module 1 includes a control processing unit and a storage unit, and is also connected to the communication module 5 and the analog output module 7. It is used to process and calculate data, obtain electrical parameters, and temporarily store them.

[0030] The control processing unit uses an ARM processor of model Cortex-M4 for issuing control instructions and processing data. The storage unit includes EEPROM, SRAM and FLASH for storing data.

[0031] Electrical parameters include: voltage, current, and power factor.

[0032] Communication module 5 communicates with external devices via wireless network. It is used to send parameters such as voltage, current and power factor calculated by the data processing module to the external devices, which are SCADA systems used to realize data visualization and monitoring.

[0033] MMI board 8, specifically the MMI270M3-1 display control board from Hongxun Company, includes indicator lights, an LCD, and a keyboard. It is connected to the data processing module 1 via CPU plug-in 4 and is used for human interaction and equipment control.

[0034] Outgoing circuit 6 includes: an optocoupler, a drive circuit, an output relay, and an external generator set for regulating the generator set's power.

[0035] The analog output module 7 is also connected to an external generator speed governor, which is used to send the frequency and fundamental power parameters calculated by the data processing module to the generator speed governor in the form of 4-channel 4-20mA current.

[0036] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. An intelligent measurement device for electrical parameters of an unmanned power station, characterized in that: include: Data processing module (1), data acquisition module (2), AD conversion module (3), CPU plug-in (4), communication module (5), output circuit (6), analog output module (7) and MMI board (8); The data acquisition module (2) is connected to the AD conversion module (3) and is used to acquire electrical data and send the acquired data to the AD conversion module (3); The AD conversion module (3) is also connected to the data processing module (1) to convert the received data from analog signals to digital signals and then send the data to the data processing module (1). The data processing module (1) is also connected to the communication module (5) and the analog output module (7) to process and calculate the data, obtain electrical parameters and temporarily store them; The communication module (5) communicates with external devices and sends parameters such as voltage, current and power factor calculated by the data processing module (1) to the external devices. The MMI board (8) includes: indicator lights, LCD and keyboard, and is connected to the data processing module (1) via CPU plug-in (4) for human interaction and device control; Open circuit (6) to connect an external generator set for adjusting the power of the generator set; The analog output module (7) is also connected to an external generator speed governor, which is used to send the frequency and power parameters calculated by the data processing module (1) to the generator speed governor.

2. The intelligent measuring device for electrical parameters of an unmanned power station according to claim 1, characterized in that: The data acquisition module (2) is an AC plug-in, model PSL623C manufactured by NARI Group Corporation.

3. The intelligent measuring device for electrical parameters of an unmanned power station according to claim 1, characterized in that: The data processing module (1) includes: a control processing unit and a storage unit; The control processing unit is used for issuing control commands and processing data. Storage units, including EEPROM, SRAM, and FLASH, are used for data storage.

4. The intelligent measuring device for electrical parameters of an unmanned power station according to claim 3, characterized in that: The control unit uses an ARM processor, specifically a Cortex-M4.

5. The intelligent measuring device for electrical parameters of an unmanned power station according to claim 2, characterized in that, The data acquisition module (2) acquires electrical data including: three-phase voltage data of voltage transformers, three-phase current data of current transformers, and zero-sequence voltage data of voltage transformers.

6. The intelligent measuring device for electrical parameters of an unmanned power station according to claim 1, characterized in that: The communication module (5) communicates with external devices using a wireless network.

7. The intelligent measuring device for electrical parameters of an unmanned power station according to claim 1, characterized in that: The analog output module (7) outputs fundamental power signals and frequency signals with four channels of 4-20mA current.

8. The intelligent measuring device for electrical parameters of an unmanned power station according to claim 1, characterized in that: The MMI board used is the MMI270M3-1 display control board from Hongxun Company.

9. The intelligent measuring device for electrical parameters of an unmanned power station according to claim 1, characterized in that: The aforementioned output circuit (6) includes: an optocoupler, a drive circuit, and an output relay.

10. The intelligent measuring device for electrical parameters of an unmanned power station according to claim 6, characterized in that: The external device mentioned is a SCADA system, which is used to realize parameter visualization and monitoring.

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