CN202372626U - Portable wind power quality monitor - Google Patents

Abstract

The utility model relates to the field of wind power quality and provides a portable wind power quality monitor. The monitor includes: voltage sensor and current sensor: convert the high voltage and high current to be measured in the wind power system into an analog signal of low voltage and small current; signal conditioner: filter and bias the analog signal; A/ D converter: Convert the processed analog signal into a digital signal; Processor: Read the digital signal converted by the A/D conversion module, use the fast Fourier algorithm FFT to process the digital signal, and at the same time pass the processed data to the touch screen for processing real-time display. The utility model can be conveniently carried to the site of the wind power generating set for accurate and real-time wind power quality monitoring. With high measurement accuracy and fast measurement speed, it can continuously and reliably monitor the power quality of on-site units for a long time, thus providing guarantee for the safe and reliable operation of wind farms.

Description

Portable wind power quality monitor

technical field

The utility model relates to the field of wind power quality, in particular to a portable wind power quality monitor.

Background technique

Wind energy, as a clean renewable energy, is currently highly valued by various countries. With the continuous increase of wind power installed capacity, the impact of wind power on grid connection cannot be ignored. The voltage, frequency fluctuations and power harmonics caused by the instability of wind speed will directly affect the power quality of the grid, so the development and research of wind power monitoring devices is more urgent. At present, the wind power quality monitoring devices used in China are all special monitoring systems, which are matched with specific wind power generation systems and installed in the central control room. They are not versatile, and they are costly, complicated to operate, and cannot be moved, so they cannot be carried to wind turbines. On-site monitoring.

Contents of the invention

The purpose of the utility model is to overcome the shortcomings of the existing wind power monitoring system, which are too specific and cannot be carried, and provide a portable wind power quality monitor. The monitor is not only small in size and low in cost, but also easy to use and portable, and can be conveniently used for on-site real-time monitoring.

The purpose of this utility model is achieved through the following technical solutions: a portable wind power quality monitor, including a voltage sensor, a current sensor, a signal conditioner, a processor and a touch screen, and the voltage sensor and the current sensor respectively control the high The voltage and high current are converted into low voltage and small current analog signals, which are filtered and biased by the signal conditioner, and then converted into digital signals, and then the digital signals are read into the memory by the processor In the process, the FFT algorithm is called for calculation and processing, and finally the processed data is displayed in real time through the touch screen.

The processor is externally connected with an SRAM memory.

The processor is downloaded and debugged through an emulation interface.

The processor is connected with the computer through the communication interface.

Described processor adopts DSP or ARM.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

The portable wind power monitoring device can be conveniently carried to the wind turbine site for accurate and real-time wind power quality monitoring. With high measurement accuracy and fast measurement speed, it can continuously and reliably monitor the power quality of on-site units for a long time, thus providing guarantee for the safe and reliable operation of wind farms.

Description of drawings

Fig. 1 is a functional block diagram of the utility model.

Fig. 2 is a histogram of phase A voltage harmonics output by the monitor of the utility model.

Fig. 3 is a three-phase voltage waveform diagram output by the monitor of the utility model.

Fig. 4 is a three-phase current waveform diagram output by the monitor of the utility model.

Detailed ways

The implementation of the utility model will be further described below in conjunction with the accompanying drawings and examples, but the implementation of the utility model is not limited thereto.

As shown in Figure 1, a portable wind power quality monitor includes a voltage sensor, a current sensor, a signal conditioner, a processor, and a touch screen. The voltage sensor and the current sensor convert the high voltage and large current to be measured in the wind power system into The analog signal of low voltage and small current is filtered and biased by the signal conditioner, and then converted into a digital signal, and then the digital signal is read into the memory by the processor, and the FFT algorithm is called for processing. Calculate and process, and finally display the processed data in real time through the touch screen.

The processor is externally connected with an SRAM memory.

The processor is downloaded and debugged through an emulation interface.

The processor is connected with the computer through the communication interface.

Described processor adopts DSP or ARM.

In terms of processor hardware selection: DSP selects high-performance 32-bit fixed-point DSP TMS320F2812, which is a fixed-point digital signal processor based on TMS320Cxx core, and ARM selects Samsung's ARM9 chip S3C2440; in terms of software: DSP adopts classic The fast Fourier algorithm (FFT) can accurately and quickly analyze the harmonic content of voltage and current. ARM adopts WINCE embedded operating system, and ARM application programs are written in C# language using Visual Studio 2008 development tools.

Use wires to connect the power grid in the wind power system with the corresponding wiring port of the monitoring instrument of the present invention, turn on the power supply, and the monitoring instrument can start to work, as shown in Figure 2 is the A-phase voltage harmonic histogram output by the monitoring instrument of the present utility model ; Fig. 3 and Fig. 4 are the three-phase voltage waveform diagram and the three-phase current waveform diagram output by the utility model monitor respectively.

Claims (5)

1. A portable wind power quality monitoring instrument is characterized in that said monitoring instrument includes a voltage sensor, a current sensor, a signal conditioner, a processor and a touch screen, and the voltage sensor and the current sensor control the high voltage and the large voltage to be measured in the wind power system respectively. The current is converted into a low-voltage, low-current analog signal, which is filtered and biased by the signal conditioner, and then converted into a digital signal, and then the digital signal is read into the memory by the processor and called The FFT algorithm is used for calculation and processing, and finally the processed data is displayed in real time through the touch screen. 2 . The portable wind power quality monitor according to claim 1 , wherein an SRAM memory is externally connected to the processor. 3 . 3. A portable wind power quality monitor according to claim 2, characterized in that the processor is downloaded and debugged through an emulation interface. 4. A portable wind power quality monitor according to claim 3, characterized in that the processor is connected to a computer through a communication interface. 5. a kind of portable wind power quality monitor according to claim 4 is characterized in that described processor adopts DSP or ARM.

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