CN202837423U - Wireless GPRS wind power power grid electric energy quality detection device based on DSP and ARM - Google Patents

Abstract

The utility model provides a wireless GPRS wind power power grid electric energy quality detection device based on DSP and ARM, comprising a mutual inductance module connected with a signal conditioning unit. The signal conditioning unit is connected with an A/D converter and a phase-locked loop, a DSP processor is connected with the A/D converter, the phase-locked loop and a double port RAM, and an ARM processor is connected with the double port RAM, a SD memorizer, a GPRS module and a human-computer interface. The wireless GPRS wind power power grid electric energy quality detection device based on DSP and ARM of the utility model can detect the electric energy quality case of each point of a power grid real-timely, and transmits the acquired data to an upper computer via a GPRS wireless network, for example, a power grid fault occurs, so that workers can determine the power grid fault point and eliminate the fault according to the uploaded data.

Description

A wireless GPRS wind power grid power quality detection device based on DSP and ARM

technical field

The utility model relates to the field of electronic technology and provides a wireless GPRS wind power grid power quality detection device based on DSP and ARM. the

Background technique

At present, the power quality problems existing in my country's wind power grid mainly include: voltage waveform distortion, voltage fluctuation, flicker, three-phase unbalance, etc., which will eventually lead to many hazardous accidents. For example, high-order harmonics and three-phase unbalance problems will cause damage to the rotor of small and medium-sized generators, and cause serious interference to relay protection and automatic devices, resulting in misoperation events. Higher harmonics are more likely to generate harmonic amplification through resonance in the grid, further causing harm to other power equipment in the grid. In our country, there have been many hazardous accidents caused by the deterioration of power grid power quality. For example, the 220KV line of a power grid once tripped due to the harmonic problem of the power grid, resulting in a large-scale power outage in the area. Another example, a 10MW gas turbine generator rotor in a power plant that supplies power to electric railways and electric arc furnaces caused overheating and damage to the embedded surface of components due to problems such as harmonics, three-phase unbalance and flicker. In order to solve these common accidents caused by power quality problems, it is necessary to pay attention to and standardize power quality, formulate relevant rules and regulations, and strictly monitor and implement them. To improve the power quality of the power grid, the first task is to vigorously develop various equipment and instruments that can monitor the power quality of the power grid. the

Contents of the invention

The purpose of the utility model is to provide a DSP and ARM-based wireless GPRS wind power grid power quality detection device for detecting the quality of the power grid. the

The utility model adopts the following technical schemes for realizing the above object:

A kind of wireless GPRS wind power grid power quality detection device based on DSP and ARM is characterized in that comprising:

Transformer: including voltage transformer and current transformer, used to complete the conversion from strong electric signal to weak electric signal;

Signal conditioning unit: including a bias circuit module for converting bipolar signals into the sampling voltage range of the A/D converter and an anti-aliasing filter for filtering out high-frequency components;

Phase-locked loop: complete automatic control of phase synchronization of two signals;

A/D converter: converts analog signals into digital signals;

DSP processor: process digital signals and control the operation of the entire power quality monitor;

Dual-port RAM: The data memory shared by the DSP processor and the ARM processor. When the DSP processor and the ARM processor share the DRAM, the memory can realize level conversion between 3.3V and 5V voltage;

ARM processor: communicate, transmit and store the collected data;

Man-machine interface: including a display module for displaying work information and a keyboard module for setting the working state;

Memory: including FLASH and SDRAM;

SD memory: store the collected signals and corresponding calculation results;

GPRS module: used for data communication with the control center through the GPRS wireless network;

The voltage transformer and current transformer convert the grid voltage and current into a weak current analog signal and send it to the bias circuit module to convert the collected analog bipolar signal into the sampling voltage range of the A/D converter, and then send it to the bias circuit module. The high-frequency components are filtered out by the anti-aliasing filter and sent to the A/D converter. The phase-locked loop triggers the A/D converter at the same time to realize the synchronous sampling of the voltage and current by the A/D converter. The A/D converter The analog signal is converted into a digital signal and then sent to the DSP processor. The DSP processor reads the conversion result, and based on the power quality performance index, completes the calculation of voltage, current, and power data. ARM sends commands to the DSP processor. The DSP processor returns the measured data and calculation results, and the ARM processor then stores them locally or transmits them to the host computer through GPRS, and realizes local display through the operation of the keyboard module and the cooperation of the display module;

The transformer is connected with the signal conditioning unit, the signal conditioning unit is connected with the A/D converter and the phase-locked loop, the DSP processor is connected with the A/D converter, the phase-locked loop and the dual-port RAM, and the ARM processor is connected with the dual-port RAM. RAM, SD memory, GPRS module and man-machine interface connection.

The voltage transformer described above adopts the model of SPT204V, and the current transformer adopts the model of SCT254FK. the

The A/D converter adopts ADS7864 chip. the

The DSP processor adopts TMS320C54X chip. the

The ARM processor adopts the S3C2410 chip. the

The GPRS module adopts MC35i model. the

The dual-port RAM adopts the Y7C025AV-15AI chip. the

The utility model has the following beneficial effects:

The utility model has a GPRS wireless communication function, and can know the real-time data of each monitoring point anytime and anywhere, and can modify and set any monitoring point and perform special detection at any time through the remote control technology, and can check the power quality at any time The data recorded by the detection device is carefully and deeply analyzed on the host computer. If any abnormal power event occurs anywhere, the power quality detection device can give an alarm prompt at the fastest speed, and the original data can be checked on the computer. The device number and location of the problem, so that the staff can handle the fault in time, and improve the stability of the entire power grid.

Description of drawings

Fig. 1 is a system block diagram of the present utility model. the

Detailed ways

A kind of wireless GPRS wind power grid power quality detection device based on DSP and ARM is characterized in that comprising:

Transformer: including voltage transformer and current transformer, used to complete the conversion from strong electric signal to weak electric signal;

Signal conditioning unit: including a bias circuit module for converting bipolar signals into the sampling voltage range of the A/converter and an anti-aliasing filter for filtering high-frequency components;

Phase-locked loop: complete automatic control of phase synchronization of two signals;

A/D converter: converts analog signals into digital signals;

DSP processor: process digital signals and control the operation of the entire power quality monitor;

Dual-port RAM: The data memory shared by the DSP processor and the ARM processor. When the DSP processor and the ARM processor share the DRAM, the memory can realize level conversion between 3.3V and 5V voltage;

ARM processor: communicate, transmit and store the collected data;

Man-machine interface: including a display module for displaying work information and a keyboard module for setting the working state;

Memory: including FLASH used to store DSP processor programs and SDRAM to solve the problem of insufficient internal RAM in the calculation process of DSP processors;

SD memory: store the collected signals and corresponding calculation results;

GPRS module: used for data communication with the control center through the GPRS wireless network;

The voltage transformer and current transformer convert the grid voltage and current into a weak current analog signal and send it to the bias circuit module to convert the collected analog bipolar signal into the sampling voltage range of the A/D converter, and then send it to the bias circuit module. The high-frequency components are filtered out by the anti-aliasing filter and sent to the A/D converter. The phase-locked loop triggers the A/D converter at the same time to realize the synchronous sampling of the voltage and current by the A/D converter. The A/D converter The analog signal is converted into a digital signal and then sent to the DSP processor. The DSP processor reads the conversion result, and based on the power quality performance index, completes the corresponding data calculations on voltage, current, power, etc., and sends the ARM to the DSP processor. Send commands, the DSP processor sends back the measured data and calculation results, and the ARM processor then stores them locally according to the preset program or transmits them to the host computer through GPRS, and realizes local display through the operation of the keyboard module and the cooperation of the display module;

The transformer block is connected with the signal conditioning unit, the signal conditioning unit is connected with the A/D converter and the phase-locked loop, the DSP processor is connected with the A/D converter, the phase-locked loop and the dual-port RAM, and the ARM processor is connected with the dual-port RAM. Port RAM, SD memory, GPRS module and man-machine interface connection.

The voltage transformer described above adopts the model of SPT204V, and the current transformer adopts the model of SCT254FK. the

The A/D converter adopts ADS7864 chip. the

The DSP processor adopts TMS320C54X chip. the

The ARM processor adopts the S3C2410 chip. the

The GPRS module adopts MC35i model. the

The dual-port RAM adopts the Y7C025AV-15AI chip. the

The utility model has a GPRS wireless communication function, and can know the real-time data of each monitoring point anytime and anywhere, and can modify and set any monitoring point and perform special detection at any time through the remote control technology, and can check the power quality at any time The data recorded by the detection device is carefully and deeply analyzed on the host computer. If any abnormal power event occurs anywhere, the power quality detection device can give an alarm prompt at the fastest speed, and the original data can be checked on the computer. The device number and location of the problem, so that the staff can handle the fault in time, and improve the stability of the entire power grid. the

Claims (7)

1. wireless GPRS wind-powered electricity generation electrical network electric energy quality detection device based on DSP and ARM is characterized in that comprising:

Mutual inductor: comprise the voltage transformer (VT) summation current transformer, be used for finishing the forceful electric power signal to the conversion of weak electric signal;

Signal condition unit: comprise for the biasing circuit module in the sampled voltage scope that bipolar signal is transformed to A/D converter and be used for the frequency overlapped-resistable filter of elimination high fdrequency component;

Phaselocked loop: finish two automatic controls that signal phase is synchronous;

A/D converter: simulating signal is converted into digital signal;

Dsp processor: digital signal is processed, controlled the operation of whole electric energy quality monitor;

Dual port RAM: the data-carrier store that dsp processor and arm processor are shared, when dsp processor and the shared DRAM of arm processor, this storer can be realized the level conversion between 3.3V and 5V voltage;

Arm processor: the data that collect are communicated transmission and storage;

Man-machine interface: comprise being used for arranging the Keysheet module of duty for the display module that shows job information;

Storer: comprise FLASH and SDRAM;

SD storer: the signal that storage of collected arrives and corresponding result of calculation;

GPRS module: be used for carrying out data communication by GPRS wireless network and control center;

Described voltage transformer (VT) summation current transformer becomes line voltage to give the biasing circuit module after the light current simulating signal and the simulated dual polar signal that collects is transformed in the sampled voltage scope of A/D converter with current conversion, then give A/D converter after giving frequency overlapped-resistable filter elimination high fdrequency component, phaselocked loop triggers A/D converter simultaneously, realize that A/D converter is to the synchronized sampling of voltage and current, A/D converter is to give dsp processor after the digital signal with analog signal conversion, dsp processor reads the result of conversion, and take quality of power supply performance index as the basis, finish voltage, electric current, the power data computing, ARM sends order to dsp processor, data and operation result that the dsp processor loopback is measured, arm processor carries out this locality storage again or passes to host computer by GPRS, and realizes local the demonstration by the operation of Keysheet module and the cooperation of display module;

Described mutual inductor is connected with the signal condition unit, the signal condition unit is connected with phaselocked loop with A/D converter, dsp processor is connected with A/D converter, phaselocked loop and dual port RAM, and arm processor is connected with man-machine interface with dual port RAM, SD storer, GPRS module.

2. a kind of wireless GPRS wind-powered electricity generation electrical network electric energy quality detection device based on DSP and ARM according to claim 1 is characterized in that: described voltage transformer (VT) employing SPT204V model, current transformer employing SCT254FK model.

3. a kind of wireless GPRS wind-powered electricity generation electrical network electric energy quality detection device based on DSP and ARM according to claim 1 is characterized in that: described A/D converter employing ADS7864 chip.

4. a kind of wireless GPRS wind-powered electricity generation electrical network electric energy quality detection device based on DSP and ARM according to claim 1 is characterized in that: described dsp processor employing TMS320C54X chip.

5. a kind of wireless GPRS wind-powered electricity generation electrical network electric energy quality detection device based on DSP and ARM according to claim 1 is characterized in that: described arm processor employing S3C2410 chip.

6. a kind of wireless GPRS wind-powered electricity generation electrical network electric energy quality detection device based on DSP and ARM according to claim 1 is characterized in that: described GPRS module employing MC35i model.

7. a kind of wireless GPRS wind-powered electricity generation electrical network electric energy quality detection device based on DSP and ARM according to claim 1 is characterized in that: described dual port RAM employing Y7C025AV-15AI chip.

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