阅读说明：本技术 一种分布式发电电能质量在线监测系统 (Distributed power generation electric energy quality on-line monitoring system ) 是由 张倩 张延迟 李鹏飞 宋悦琳 于 2019-03-12 设计创作，主要内容包括：本发明涉及一种分布式发电电能质量在线监测系统,包括相互连接的ATT7022E芯片(1)、STM32F103ZE芯片(2),ATT7022E芯片(1)采集电压和电流,STM32F103ZE芯片(2)进行数据处理、存储和通信。与现有技术相比,本发明在功能健全的基础上,提高了实时性和准确性,且具有体积小、性价比高、处理速度快的特点。(The invention relates to a distributed power generation electric energy quality online monitoring system which comprises an ATT7022E chip (1) and an STM32F103ZE chip (2) which are connected with each other, wherein the ATT7022E chip (1) acquires voltage and current, and the STM32F103ZE chip (2) performs data processing, storage and communication. Compared with the prior art, the invention improves the real-time performance and the accuracy on the basis of sound functions, and has the characteristics of small volume, high cost performance and high processing speed.)

1. The utility model provides a distributed generation electric energy quality on-line monitoring system which characterized in that, including interconnect's ATT7022E chip (1), STM32F103ZE chip (2), voltage and current are gathered to ATT7022E chip (1), and STM32F103ZE chip (2) carry out data processing, storage and communication.

2. The distributed power generation power quality online monitoring system according to claim 1, wherein the ATT7022E chip (1) and the STM32F103ZE chip (2) are connected through an SPI interface.

3. The distributed power generation power quality online monitoring system according to claim 1, wherein the STM32F103ZE chip (2) is communicated with an upper computer by a CAN bus (6) or a GPRS communication module (7).

4. The distributed power generation electric energy quality online monitoring system according to claim 1, wherein the STM32F103ZE chip (2) is connected with a network chip DM9051 with an SPI interface, or a CAN bus (6) is converted into WIFI communication through a CANWIFI-200T converter (8), so that Ethernet communication is realized.

5. The distributed power generation power quality online monitoring system according to claim 1, wherein the STM32F103ZE chip (2) is connected with a SD card (4) with a capacity of 4G, and a power parameter file with time as a file name is stored in the SD card (4).

6. The distributed power generation power quality online monitoring system according to claim 1, wherein the STM32F103ZE chip (2) is connected with a DS1307 clock chip (3).

7. The distributed power generation power quality online monitoring system according to claim 1, wherein a display (5) is connected to the STM32F103ZE chip (2).

Technical Field

The invention relates to the field of power quality online monitoring and data analysis, in particular to a distributed power generation power quality online monitoring device.

Background

The distributed power generation technology is an indispensable important supplement of a centralized power supply mode technology and becomes an important development direction in the future energy field, but the distributed power generation causes distortion of current and voltage waveforms of a power grid and causes harmonic pollution and other energy quality problems of the power grid. The key point of ensuring the power quality is whether the abnormity of the power grid can be accurately detected, so the power quality monitoring device is one of the main devices for power quality management.

At present, there are three main monitoring modes for electric energy quality at home and abroad: (1) single point "snapshot" monitoring mode: the voltage and current changes of a selected point are monitored in real time by using a portable instrument, and steady-state power quality levels such as voltage deviation, harmonic waves, flicker, voltage unbalance and the like are mastered; (2) time "trend" mode. The method comprises the steps of monitoring and recording the power quality change within a period of time (1 week or 1 month) by using a mobile installed power quality monitoring device, analyzing and counting the power quality change within the monitoring period of time by applying background analysis software, and giving the power quality change rule and trend within the period of time. (3) And (5) a system monitoring mode. And the online monitoring devices are arranged at selected points of a plurality of systems, are communicated with the power quality analysis master station through a communication network, monitor the power quality state of the systems in real time, analyze and count the power quality change in the systems and give out the historical trend of the power quality change. The online power quality monitoring device mainly comprises a distributed real-time power quality monitoring device based on a DSP (digital signal processor) and an MCU (micro-programmed control unit) and a power quality monitoring and analyzing device realized by an industrial control computer and a data acquisition card.

The traditional electric power data acquisition device has the defects of single chip function, small storage space, complex software program algorithm, poor instantaneity, insufficient precision, low efficiency and the like. Although the distributed power quality monitoring device using the DSP + MCU mode has comprehensive functions and high data processing and analyzing speed, the stored data volume is not large, statistical analysis can not be performed on a large amount of real-time data, the data processing and analyzing speed needs to be completed by an upper computer, important historical data can not be kept for a long time, deep remote test and analysis can not be performed, and the statistical analysis function is insufficient. (2) The real-time performance of the system by the power quality monitoring device realized by the industrial control computer and the data acquisition card is difficult to guarantee, and the intelligent and networked levelness is not high.

With the development of the electricity selling side and the release of the electricity selling market, the number of electricity selling companies and the form of participating in market transaction are continuously increased, and an electric energy quality monitoring system at a user end of the electricity selling side is urgently needed.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a distributed power generation quality online monitoring system applied to a power selling side user side.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a distributed generation electric energy quality on-line monitoring system, includes interconnect's ATT7022E chip, STM32F103ZE chip, and ATT7022E chip gathers voltage and electric current, and STM32F103ZE chip carries out data processing, storage and communication.

The ATT7022E chip and the STM32F103ZE chip are connected through an SPI interface.

The STM32F103ZE chip adopts CAN bus or GPRS communication module and host computer communication.

The STM32F103ZE chip is connected with a network chip DM9051 with an SPI interface, or a CAN bus is converted into WIFI communication through a CANWIFI-200T converter, so that Ethernet communication is realized.

The STM32F103ZE chip is connected with a SD card with 4G capacity, and the SD card stores an electric energy parameter file with time as a file name.

The STM32F103ZE chip is connected with a DS1307 clock chip.

The STM32F103ZE chip is connected with a display.

Compared with the prior art, the invention has the following advantages:

(1) the invention is compatible with various communication modes, such as CAN bus and GPRS communication, CAN add an Ethernet function by matching with a DM9051 chip or through a CANWIFI-200T converter, CAN store effective data in an SD card in real time under the condition of poor network environment, and adopts the SD card with 4G capacity for storage, so that the storage space is large.

(2) The invention can capture common power quality problems of harmonic waves, voltage fluctuation, flicker, power, three-phase imbalance and the like of a fault site, can monitor the state of the breaker, stores the waveform of power data, and provides performance evaluation and treatment decision in the aspect of power quality for a power grid.

(3) The DS1307 clock chip is combined, time is used as a file name for storage, transient events such as voltage dip, current dip, overvoltage and undervoltage can be recorded clearly, and the recorded time information can be used for metering electric energy.

(4) The STM32F103ZE chip is connected with a display and can display power data in real time.

(5) On the basis of sound functions, the invention improves the real-time performance and the accuracy, has the characteristics of small volume, high cost performance and high processing speed, and is more suitable for monitoring the electric energy quality of distributed energy or the electric energy quality of a micro-grid.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of an Ethernet architecture;

reference numerals:

1 is ATT7022E chip; STM32F103ZE chip 2; 3 is DS1307 clock chip; 4 is an SD card; 5 is a display; 6 is a CAN bus; 7 is a GPRS communication module; 8 is a CANWIFI-200T converter; 9 is WLAN; 10 is a CAN network; 11 is a user equipment.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.