CN104865427A - Precise high-current transient current rise generating device - Google Patents
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Abstract
本发明公开了一种精密大电流的暂态升流发生装置，包括IO输入设备单元、微机控制单元、数字信号控制处理单元、D/A变换器、A/D变换器、输出电流采集单元、大功率线性电流功率放大器单元和用于给所述大功率线性电流功率放大器单元供电的三相直流整流滤波电源；本发明通过电流采集单元采集测量暂态大电流信号，由A/D变换器将暂态大电流信号变换为数字信号传输给数字信号控制处理单元，经微机控制单元运行处理，得到暂态大电流信号的幅值和波形。同时通由微机控制单元完成多种方式的暂态信号的运行计算处理，经过数字信号控制处理单元对D/A变换器的控制，实现暂态模拟信号输出。
The invention discloses a transient rising current generating device of precision and large current, which comprises an IO input device unit, a microcomputer control unit, a digital signal control processing unit, a D/A converter, an A/D converter, an output current acquisition unit, A high-power linear current power amplifier unit and a three-phase DC rectified and filtered power supply for supplying power to the high-power linear current power amplifier unit; the present invention collects and measures transient large current signals through the current acquisition unit, and the A/D converter converts the The transient large current signal is converted into a digital signal and transmitted to the digital signal control processing unit, and the amplitude and waveform of the transient high current signal are obtained through the operation and processing of the microcomputer control unit. At the same time, the computer control unit completes the operation calculation and processing of various modes of transient signals, and the digital signal control processing unit controls the D/A converter to realize the output of transient analog signals.
Description
技术领域 technical field
本发明涉及电力系统暂态测试技术领域，尤其涉及一种精密大电流的暂态升流发生装置。 The present invention relates to the technical field of power system transient testing, in particular to a precise high-current transient up-current generating device.
背景技术 Background technique
随着我国智能电网建设的迅猛发展，各种新型的电子式电流互感器在特高压输变电系统中使用越来越多。这些工作原理方法先进的电子式电流互感器将电网的供电电流值传感检测供给电力系统二次保护和计量装置。电力系统利用电子式电流互感器传感检测一次测的电流信号包含一次电流的稳态电流信号、暂态电流信号和各种故障电流信号，电力系统二次侧的保护和计量设备经根据这些电流信号完成电力系统的故障保护和电能计量。 With the rapid development of my country's smart grid construction, various new electronic current transformers are used more and more in UHV power transmission and transformation systems. These advanced electronic current transformers with working principles and methods will sense and detect the power supply current value of the power grid and supply it to the secondary protection and metering device of the power system. The power system uses electronic current transformers to sense and detect the primary current signal, including the steady-state current signal, transient current signal and various fault current signals of the primary current. The protection and metering equipment on the secondary side of the power system are based on these current signals. The signal completes the fault protection and energy metering of the power system.
电子互感器与传统电磁式互感器相比具有诸多优点，例如：电子互感器具有无磁饱和、频率响应范围宽、暂态特性好、绝缘结构简单、不存在二次开路或短路隐患等；能够以数字信号输出；传输中用光缆代替了电缆，从根本上解决了互感器在电流、电压信号传输过程中所产生的附加误差；有利于变电站实现数据共享；能够满足更高程度变电站自动化需求。 Compared with traditional electromagnetic transformers, electronic transformers have many advantages, such as: electronic transformers have no magnetic saturation, wide frequency response range, good transient characteristics, simple insulation structure, and no secondary open or short circuit hidden dangers; Digital signal output; optical cable is used instead of cable in transmission, which fundamentally solves the additional error generated by transformer in the process of current and voltage signal transmission; it is conducive to data sharing in substations; it can meet the needs of higher-level substation automation.
为了保证电子互感器的准确度，确保系统安全、稳定，必须对这些电子式互感器进行测试。但是，与传统互感器相比．电子互感器在测量原理、结构和输出信号的方式上发生了根本的改变，传统互感器测试方法并不适用于电子互感器。 In order to ensure the accuracy of electronic transformers and ensure the safety and stability of the system, these electronic transformers must be tested. However, compared with traditional transformers. Fundamental changes have taken place in the measurement principle, structure and output signal mode of electronic transformers, and the traditional transformer testing methods are not suitable for electronic transformers.
目前对电力系统一次侧使用的电子式电流互感器的性能测试，一般是人工通过升流变压器手动调节的方式给定被测电流互感器的试验电流，然后由人工通过万用表测量该电流互感器的次级电流。这样测试，一方面会造成过大的人为误差，难以保证高精度的测试结果，给试验测试人员带来一些安全隐患；另一方面只能测试电子式电流互感器的稳态值，不能测试电子式电流互感器的各种暂态特性参数。 At present, the performance test of the electronic current transformer used on the primary side of the power system is generally given the test current of the measured current transformer manually through the manual adjustment of the step-up transformer, and then the current transformer is manually measured through the multimeter. secondary current. Such testing, on the one hand, will cause excessive human error, making it difficult to guarantee high-precision test results, and bring some safety hazards to testers; on the other hand, it can only test the steady-state value of electronic current transformers, and cannot test electronic current transformers. Various transient characteristic parameters of type current transformer.
而且随着国内对电子式电流互感器现场校验的需求越来越多，不仅要求此类电流发生器的输出电流能够在几安至数千安的大范围内连续可调，而且还要按照国家标准输出给定波形的稳态和暂态大电流，同时保证输出电流的高精度、高稳定度；以及为了满足现场测试的需求，保证此类电源体积小、重量轻、可靠性高。然而目前还没有满足上述全部要求的精密大电流的暂态升流发生装置。 Moreover, with the increasing demand for on-site calibration of electronic current transformers in China, it is not only required that the output current of this type of current generator can be continuously adjusted in a wide range from a few amps to thousands of amps, but also in accordance with The national standard outputs the steady-state and transient large current of a given waveform, while ensuring the high precision and high stability of the output current; and in order to meet the needs of field testing, to ensure that this type of power supply is small in size, light in weight and high in reliability. However, there is no precise high-current transient boost current generating device that meets all the above-mentioned requirements.
发明内容 Contents of the invention
本发明的目的是提供一种精密大电流的暂态升流发生装置，能对电力系统一次侧电子式电流互感器的暂态特性进行精确的测试。 The purpose of the present invention is to provide a precise high-current transient step-up generating device, which can accurately test the transient characteristics of the electronic current transformer on the primary side of the power system.
本发明采用下述技术方案： The present invention adopts following technical scheme:
一种精密大电流的暂态升流发生装置，包括IO输入设备单元、微机控制单元、数字信号控制处理单元、D/A变换器、A/D变换器、输出电流采集单元、大功率线性电流功率放大器单元和用于给所述大功率线性电流功率放大器单元供电的三相直流整流滤波电源；所述IO输入设备单元与微机控制单元相连，所述微机控制单元与数字信号控制处理单元相连，所述数字信号控制处理单元分别与所述D/A变换器的输入端和所述A/D变换器的输出端相连接，D/A变换器的输出端与所述大功率线性电流功率放大器单元的输入端相连；大功率线性电流功率放大器单元的输出端连接有输出电流采集单元的采集输入端，输出电流采集单元的输出端口连接A/D变换器的输入端。 A precise high-current transient rising current generating device, including an IO input device unit, a microcomputer control unit, a digital signal control processing unit, a D/A converter, an A/D converter, an output current acquisition unit, and a high-power linear current A power amplifier unit and a three-phase DC rectified and filtered power supply for supplying power to the high-power linear current power amplifier unit; the IO input device unit is connected to a microcomputer control unit, and the microcomputer control unit is connected to a digital signal control processing unit, The digital signal control processing unit is respectively connected to the input end of the D/A converter and the output end of the A/D converter, and the output end of the D/A converter is connected to the high-power linear current power amplifier The input ends of the units are connected; the output end of the high-power linear current power amplifier unit is connected with the acquisition input end of the output current acquisition unit, and the output port of the output current acquisition unit is connected with the input end of the A/D converter.
所述三相直流整流滤波电源通过三相隔离整流变压器与三相输入电源相连，经隔离降压输出给所述三相直流整流滤波电源。 The three-phase DC rectifying and filtering power supply is connected to the three-phase input power supply through a three-phase isolation and rectifying transformer, and is output to the three-phase DC rectifying and filtering power supply through isolation and step-down.
所述数字信号控制处理单元由高速DSP和FPGA 组成。 The digital signal control processing unit is composed of high-speed DSP and FPGA.
所述IO输入设备单元包括由工控机、键盘、显示器、USB接口和网口构成，所述键盘、显示器、USB接口和网口分别与工控机相连接。 The IO input device unit is composed of an industrial computer, a keyboard, a display, a USB interface and a network port, and the keyboard, the display, the USB interface and the network port are respectively connected with the industrial computer.
所述微机控制单元主要由工控机、台式PC、笔记本电脑等CPU组成。 The microcomputer control unit is mainly composed of industrial computer, desktop PC, notebook computer and other CPUs.
所述大功率线性电流功率放大器单元用于将所述数字信号控制处理单元控制经所述D/A变换器变换输出的暂态模拟信号放大，发生暂态大电流输出给负载，输出的暂态大电流信号经所述输出电流采集单元采集测量经所述A/D变换器变换为数字量，经所述数字信号控制处理单元和所述微机控制单元计算控制，输出显示暂态电流波形和幅值。 The high-power linear current power amplifier unit is used to amplify the transient analog signal converted and output by the digital signal control processing unit through the D/A converter, generate a transient large current and output it to the load, and the output transient The large current signal is collected and measured by the output current acquisition unit and converted into a digital quantity by the A/D converter, and is calculated and controlled by the digital signal control processing unit and the microcomputer control unit to output and display the transient current waveform and amplitude. value.
所述的微机控制单元，用于处理所述键盘、显示、USB口、网口等IO设备单元输入输出的信号指令并运行相关应用软件工具产生出装置所需的暂态电流数字控制信号，控制所述数字信号控制处理单元，通过所述D/A变换器变换输出的对应的暂态模拟信号。 The microcomputer control unit is used to process the input and output signal instructions of the IO equipment units such as the keyboard, display, USB port, and network port, and run relevant application software tools to generate the transient current digital control signal required by the device, and control The digital signal control processing unit transforms the output corresponding transient analog signal through the D/A converter.
本发明通过电流采集单元采集测量暂态大电流信号，由A/D变换器将暂态大电流信号变换为数字信号传输给数字信号控制处理单元，经微机控制单元运行处理，得到暂态大电流信号的幅值和波形。同时通过键盘、显示、USB口、网口等IO设备单元完成装置的工作参数设定和控制操作，由微机控制单元完成多种方式的暂态信号的运行计算处理，经过数字信号控制处理单元对D/A变换器的控制，实现暂态模拟信号输出。通过本发明的装置和发生方法产生的精密暂态大电流波形失真小，频带宽，响应快。输出的状态电流幅值和波形可实时在通过微机控制单元显示在显示屏，并可通过IO口存储到外存设备里。多种暂态信号发生方法便于对电力系统一次电子式电流互感器的暂态特性测试的综合测试。 The present invention collects and measures the transient large current signal through the current acquisition unit, converts the transient large current signal into a digital signal by the A/D converter and transmits it to the digital signal control processing unit, and obtains the transient large current through the operation and processing of the microcomputer control unit The amplitude and shape of the signal. At the same time, the working parameter setting and control operation of the device are completed through the keyboard, display, USB port, network port and other IO equipment units. The microcomputer control unit completes the operation calculation and processing of various transient signals. The control of D/A converter realizes the output of transient analog signal. The precise transient large current waveform generated by the device and generating method of the invention has small distortion, wide frequency band and fast response. The output state current amplitude and waveform can be displayed on the display screen through the microcomputer control unit in real time, and can be stored in the external storage device through the IO port. A variety of transient signal generation methods are convenient for the comprehensive test of the transient characteristic test of the primary electronic current transformer in the power system.
附图说明 Description of drawings
图1为本发明的结构原理框图。 Fig. 1 is a structural principle block diagram of the present invention.
具体实施方式 Detailed ways
如图1所示一种精密大电流的暂态升流发生装置，包括IO输入设备单元、微机控制单元、数字信号控制处理单元、D/A变换器、A/D变换器、输出电流采集单元、大功率线性电流功率放大器单元和用于给所述大功率线性电流功率放大器单元供电的三相直流整流滤波电源；所述IO输入设备单元与微机控制单元相连，所述微机控制单元与数字信号控制处理单元相连，所述数字信号控制处理单元分别与所述D/A变换器的输入端和所述A/D变换器的输出端相连接，D/A变换器的输出端与所述大功率线性电流功率放大器单元的输入端相连；大功率线性电流功率放大器单元的输出端连接有输出电流采集单元的采集输入端，输出电流采集单元的输出端口连接A/D变换器的输入端。 As shown in Figure 1, a precise high-current transient up-current generating device includes an IO input device unit, a microcomputer control unit, a digital signal control processing unit, a D/A converter, an A/D converter, and an output current acquisition unit. , a high-power linear current power amplifier unit and a three-phase DC rectified filter power supply for supplying power to the high-power linear current power amplifier unit; the IO input device unit is connected with a microcomputer control unit, and the microcomputer control unit is connected with a digital signal The control processing unit is connected, and the digital signal control processing unit is respectively connected with the input end of the D/A converter and the output end of the A/D converter, and the output end of the D/A converter is connected with the large The input end of the power linear current power amplifier unit is connected; the output end of the high-power linear current power amplifier unit is connected with the acquisition input end of the output current acquisition unit, and the output port of the output current acquisition unit is connected with the input end of the A/D converter.
所述三相直流整流滤波电源通过三相隔离整流变压器与三相输入电源相连，经隔离降压输出给所述三相直流整流滤波电源。所述数字信号控制处理单元由高速DSP和FPGA 组成。 The three-phase DC rectifying and filtering power supply is connected to the three-phase input power supply through a three-phase isolation and rectifying transformer, and is output to the three-phase DC rectifying and filtering power supply through isolation and step-down. The digital signal control processing unit is composed of high-speed DSP and FPGA.
所述IO输入设备单元包括由工控机、键盘、显示器、USB接口和网口构成，所述键盘、显示器、USB接口和网口分别与工控机相连接。单元的外围IO设备，主要完成对本发明装置的参数设置输入和测试数据、图形、报告的输出。所述微机控制单元主要由工控机、台式PC、笔记本电脑等CPU组成。 The IO input device unit is composed of an industrial computer, a keyboard, a display, a USB interface and a network port, and the keyboard, the display, the USB interface and the network port are respectively connected with the industrial computer. The peripheral IO equipment of the unit mainly completes the parameter setting input of the device of the present invention and the output of test data, graphics and reports. The microcomputer control unit is mainly composed of industrial computer, desktop PC, notebook computer and other CPUs.
所述大功率线性电流功率放大器单元用于将所述数字信号控制处理单元控制经D/A变换器变换输出的暂态模拟信号放大，发生暂态大电流输出给负载，输出的暂态大电流信号经所述输出电流采集单元采集测量经所述A/D变换器变换为数字量，经所述数字信号控制处理单元和所述微机控制单元计算控制，输出显示暂态电流波形和幅值。 The high-power linear current power amplifier unit is used to amplify the transient analog signal converted and output by the digital signal control processing unit through the D/A converter, generate a transient large current and output it to the load, and the output transient large current The signal is collected and measured by the output current acquisition unit and converted into a digital quantity by the A/D converter, and is calculated and controlled by the digital signal control processing unit and the microcomputer control unit to output and display the transient current waveform and amplitude.
所述的微机控制单元，用于处理所述键盘、显示、USB口、网口等IO设备单元输入输出的信号指令并运行相关应用软件工具产生出装置所需的暂态电流数字控制信号，控制所述数字信号控制处理单元，通过所述D/A变换器变换输出的对应的暂态模拟信号。 The microcomputer control unit is used to process the input and output signal instructions of the IO equipment units such as the keyboard, display, USB port, and network port, and run relevant application software tools to generate the transient current digital control signal required by the device, and control The digital signal control processing unit transforms the output corresponding transient analog signal through the D/A converter.
下面对本发明的精密大电流暂态升流装置的工作原理简述如下： The working principle of the precision large current transient boosting device of the present invention is briefly described below:
本发明由三相隔离整流变压器完成对输入电源的降压隔离，经三相直流整流滤波电源整流滤波输出直流电源给大功率线性电流功率放大器单元，大功率线性电流功率放大器单元将D/A变换器输入的暂态电流信号进行功率放大，输出暂态大电流功率信号给被试设备测试。 In the present invention, a three-phase isolated rectifier transformer completes the step-down isolation of the input power supply, and the three-phase DC rectified and filtered power supply rectifies and filters the output DC power to the high-power linear current power amplifier unit, which converts D/A The transient current signal input by the device is amplified, and the transient high current power signal is output to the device under test for testing.
装置中输出电流采集单元与大功率线性电流功率放大器单元的输出相连，采集测量暂态大电流信号，输出电流采集单元与A/D变换器相连，由A/D变换器将暂态大电流信号变换为数字信号传输给数字信号控制处理单元，经微机控制单元运行处理，得到暂态大电流信号的幅值和波形，所述暂态大电流信号的幅值和波形经键盘、显示、USB口、网口等IO设备单元显示输出。同时通过键盘、显示、USB口、网口等IO设备单元完成装置的工作参数设定和控制操作，由微机控制单元完成多种方式的暂态信号的运行计算处理，经过数字信号控制处理单元对D/A变换器的控制，实现暂态模拟信号输出。其中多种方式的暂态信号的运行计算处理为领域内公知技术，在此不再一一举例赘述。 The output current acquisition unit in the device is connected to the output of the high-power linear current power amplifier unit to collect and measure transient large current signals. The output current acquisition unit is connected to the A/D converter, and the transient large current signal is converted by the A/D converter. It is converted into a digital signal and transmitted to the digital signal control processing unit, and the amplitude and waveform of the transient high current signal are obtained through the operation and processing of the microcomputer control unit. , network port and other IO device units display output. At the same time, the working parameter setting and control operation of the device are completed through the keyboard, display, USB port, network port and other IO equipment units. The microcomputer control unit completes the operation calculation and processing of various transient signals. The control of D/A converter realizes the output of transient analog signal. The operation, calculation and processing of various modes of transient signals are well-known technologies in the field, and will not be described here one by one with examples.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107528485A (en) * | 2017-10-10 | 2017-12-29 | 浙江嘉科电子有限公司 | A kind of high current waveform generator |
| CN108134524A (en) * | 2017-12-18 | 2018-06-08 | 中国电子科技集团公司第四十研究所 | A kind of programme-controlled dc power control circuit |
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| CN104865427B (en) | 2018-02-16 |
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