CN205160469U - A monitor cell for photovoltaic power generation system monitoring devices - Google Patents

A monitor cell for photovoltaic power generation system monitoring devices Download PDF

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Publication number
CN205160469U
CN205160469U CN201520845667.1U CN201520845667U CN205160469U CN 205160469 U CN205160469 U CN 205160469U CN 201520845667 U CN201520845667 U CN 201520845667U CN 205160469 U CN205160469 U CN 205160469U
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China
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signal
connects
generating system
monitoring
photovoltaic generating
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李媛
郭剑峰
袁辉建
赵莹
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State Grid Corp of China SGCC
Chongqing Electric Power College
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State Grid Corp of China SGCC
Chongqing Electric Power College
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

The utility model provides a monitor cell for photovoltaic power generation system monitoring devices, it includes: monitoring processor, interchange sensor, the first signal modulate circuit and high accuracy measurement chip, it connects photovoltaic power generation system interchange electrical signal output terminal to exchange the sensor signal input, it takes care of the signal input circuit end to exchange sensor signal output connection the first signal, the first signal takes care of electric circuit signal output end and connects high accuracy measurement chip signal input part, high accuracy measurement chip signal interaction terminal connects monitoring processor signal interaction terminal, monitoring processor shows that connected signal display device shows the signal end. Master power generation system's current operation conditions, in time discover unusually and take measures.

Description

For the monitoring means of photovoltaic generating system monitoring device
Technical field
The utility model relates to photovoltaic generation monitoring field, particularly relates to a kind of monitoring means for photovoltaic generating system monitoring device.
Background technology
Along with the development of electric power system, the shared in systems in which ratio of photovoltaic generation is increasing.Photovoltaic generation is comparatively large by such environmental effects such as Intensity of the sunlight intensity, temperature, wind speed, and its generating feature has randomness, intermittence, brings have a strong impact on when being incorporated into the power networks to peak load regulation network, system safety operation and the quality of power supply.Therefore, be necessary to the operation conditions of whole photovoltaic generating system and and dot parameters monitor.By to Monitoring Data collection, analysis, process, inquiry, grasp the current operating conditions of electricity generation system, Timeliness coverage abnormal conditions are also taken measures.But can't well solve corresponding technical problem in prior art.
Utility model content
The utility model is intended at least solve the technical problem existed in prior art, especially innovatively proposes a kind of monitoring means for photovoltaic generating system monitoring device.
In order to realize above-mentioned purpose of the present utility model, the utility model provides a kind of monitoring means for photovoltaic generating system monitoring device, and it comprises: monitoring processor, ac sensor, the first signal conditioning circuit and high-precision measuring chip;
Ac sensor signal input part connects photovoltaic generating system ac signal output, described ac sensor signal output part connects the first signal conditioning circuit signal input part, described first signal conditioning circuit signal output part connects high-precision measuring chip signal input, described high-precision measuring chip signal interaction end connects monitoring processor signal interaction end, and described monitoring processor display end connects display unit display end.
The described monitoring means for photovoltaic generating system monitoring device, preferably, also comprises: direct current transducer, secondary signal modulate circuit, AD sampler;
Direct current transducer signal input part connects photovoltaic generating system DC signal output, described direct current transducer signal output part connects secondary signal modulate circuit signal input part, described secondary signal modulate circuit signal output part connects AD sampler signal input part, described AD sampled signal interaction end connects monitoring processor signal interaction end, and described monitoring processor display end connects display unit display end.
The beneficial effect of technique scheme is: can monitor the power quality parameters such as photovoltaic generating system harmonic wave, power factor, percent harmonic distortion, grasps the current operating conditions of electricity generation system, and Timeliness coverage exception is also taken measures.
The described monitoring means for photovoltaic generating system monitoring device, preferably, described first signal conditioning circuit comprises: voltage channel circuit and current channel circuit;
Described voltage channel circuit comprises: voltage input end connects first inductance one end, the described first inductance other end connects first resistance one end, the described first resistance other end connects second resistance one end and first electric capacity one end respectively, ground connection after the described second resistance other end is connected with the first electric capacity other end, described first electric capacity one end also connects high-precision measuring chip signal input and overvoltage protection diode negative pole respectively;
Described current channel circuit comprises: current input terminal connects the 4th resistance one end and the 3rd inductance one end respectively, the described 4th resistance other end connects second inductance one end, the described 3rd inductance other end connects AD converter electrode input end, the described second inductance other end connects AD converter negative input, and described AD converter output connects high-precision measuring chip signal input.
The beneficial effect of technique scheme is: by voltage channel circuit and current channel circuit realiration conditioning functions, and circuit design is reasonable, working stability.
The described monitoring means for photovoltaic generating system monitoring device, preferably, described monitoring processor is LPC2368.
The described monitoring means for photovoltaic generating system monitoring device, preferably, described high-precision measuring chip is ADE7880.
The described monitoring means for photovoltaic generating system monitoring device, preferably, described display unit is liquid crystal touch display screen.
The described monitoring means for photovoltaic generating system monitoring device, preferably, described overvoltage protection diode is TVS diode.
The described monitoring means for photovoltaic generating system monitoring device, preferably, described 4th resistance is copper-manganese sampling resistor.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
In conjunction with the utility model of the photovoltaic generating system system monitoring system of LPC2368, ADE7880, direct current sampling, environmental parameter collecting cassette, this device utilizes LPC2368 controller to control collection to photovoltaic system on-site generated power system alternating current-direct current data, by can to Monitoring Data collection, analysis, process, inquiry with monitoring host computer.By testing results on the spot, this device can not only gather routine datas such as photovoltaic generating system voltage, electric current, power, generating efficiency, environmental parameters, the power quality parameters such as photovoltaic generating system harmonic wave, power factor, percent harmonic distortion can also be monitored, grasp the current operating conditions of electricity generation system, Timeliness coverage exception is also taken measures.This device can not only be used for the monitoring of photovoltaic generating system, also can also for the monitoring field of other qualities of power supply.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the utility model general illustration;
Fig. 2 is the utility model monitoring means schematic diagram;
Fig. 3 is the utility model voltage channel schematic diagram;
Fig. 4 is the utility model current channel schematic diagram;
Fig. 5 is the utility model LPC2368 and ADE7880 interface diagram;
Fig. 6 is the utility model environmental parameter collecting cassette structure chart.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In description of the present utility model, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
As shown in Figure 1, monitoring device of the present utility model, it comprises: monitoring host computer, monitoring means, environmental parameter collecting cassette;
Described monitoring means Monitoring Data interaction end connects monitoring host computer Monitoring Data interaction end, described environmental parameter collecting cassette environmental data interaction end connects monitoring host computer environmental data interaction end, and described monitoring means and environmental parameter collecting cassette and monitoring host computer carry out data interaction by RS485 bus.
The beneficial effect of technique scheme is: carry out Real-Time Monitoring and data acquisition by environmental parameter collecting cassette and monitoring means to photovoltaic generating system, ensure that the monitoring of data is accurate, grasp the current operating conditions of electricity generation system, Timeliness coverage exception is also taken measures.
As shown in Figure 2, described monitoring means comprises: monitoring processor, ac sensor, the first signal conditioning circuit and high-precision measuring chip;
Ac sensor signal input part connects photovoltaic generating system ac signal output, described ac sensor signal output part connects the first signal conditioning circuit signal input part, described first signal conditioning circuit signal output part connects high-precision measuring chip signal input, described high-precision measuring chip signal interaction end connects monitoring processor signal interaction end, and described monitoring processor display end connects display unit display end.
Described monitoring means also comprises: direct current transducer, secondary signal modulate circuit, AD sampler;
Direct current transducer signal input part connects photovoltaic generating system DC signal output, described direct current transducer signal output part connects secondary signal modulate circuit signal input part, described secondary signal modulate circuit signal output part connects AD sampler signal input part, described AD sampled signal interaction end connects monitoring processor signal interaction end, and described monitoring processor display end connects display unit display end.
The beneficial effect of technique scheme is: can monitor the power quality parameters such as photovoltaic generating system harmonic wave, power factor, percent harmonic distortion, grasps the current operating conditions of electricity generation system, and Timeliness coverage exception is also taken measures.
Preferably, described monitoring processor is LPC2368.
Preferably, described high-precision measuring chip is ADE7880.
Preferably, described display unit is liquid crystal touch display screen.
As shown in Figure 3, preferably, described first signal conditioning circuit comprises: voltage channel circuit and current channel circuit;
Described voltage channel circuit comprises: voltage input end connects first inductance one end, the described first inductance other end connects first resistance one end, the described first resistance other end connects second resistance one end and first electric capacity one end respectively, ground connection after the described second resistance other end is connected with the first electric capacity other end, described first electric capacity one end also connects high-precision measuring chip signal input and overvoltage protection diode negative pole respectively;
As shown in Figure 4, described current channel circuit comprises: current input terminal connects the 4th resistance one end and the 3rd inductance one end respectively, the described 4th resistance other end connects second inductance one end, the described 3rd inductance other end connects AD converter electrode input end, the described second inductance other end connects AD converter negative input, and described AD converter output connects high-precision measuring chip signal input.
Described secondary signal modulate circuit is the same.
The beneficial effect of technique scheme is: by voltage channel circuit and current channel circuit realiration conditioning functions, and circuit design is reasonable, working stability.
Preferably, described monitoring processor is LPC2368.
Preferably, described high-precision measuring chip is ADE7880.
As shown in Figure 6, the utility model environmental parameter collecting cassette, it comprises: temperature sensor, irradiance sensor and air velocity transducer;
Described temperature sensor signal interaction end JA(junction ambient) parameter acquisition temperature of processor signal interaction end, described irradiance sensor signal interaction end connects JA(junction ambient) parameter acquisition processor irradiance signal interaction end, described air velocity transducer signal interaction end connects JA(junction ambient) parameter acquisition processor wind velocity signal interaction end, and described temperature sensor, irradiance sensor and air velocity transducer are for gathering the environmental parameter of photovoltaic generating system.
The beneficial effect of technique scheme is: by the temperature of temperature sensor, irradiance sensor and air velocity transducer Real-time Collection photovoltaic generating system, irradiance and wind speed, guarantees that information gathering is accurate, its running status of Real-Time Monitoring.
Described environmental parameter Acquisition Processor is MSP430 processor.
Described temperature sensor comprises: photovoltaic generating system monitoring device temperature sensor and environment temperature sensor;
Described photovoltaic generating system monitoring device temperature sensor signal interaction end JA(junction ambient) parameter acquisition temperature of processor signal interaction end, described environment temperature sensor signal interaction end also JA(junction ambient) parameter acquisition processor signal interaction end.
Preferably, described air velocity transducer is DP-FS485.
Preferably, described irradiance sensor is FY-ZF.
Preferably, described temperature sensor is PT100.
The built-in multiple second order type analog to digital converter (ADC) of ADE7880, digital integrator, reference voltage source circuit and all required signal processing circuits, realize electric current, voltage waveform sampling with high precision, total (first-harmonic and harmonic wave) meritorious/apparent power measurement and effective value calculate, and fundamental active/wattless power measurement.In addition, ADE7880 calculates the harmonic wave root mean square on phase place and neutral line current and phase voltage, meritorious/idle/apparent power, and power factor and harmonic distortion on each harmonic wave of all phase places.Total harmonic distortion (THD) can be calculated for all electric currents and voltage simultaneously.While high-acruracy survey, also there is the function of phase-splitting system calibration, include valid value offset.
Monitoring means for photovoltaic generating system monitoring device is made up of monitoring host computer, monitoring means, environmental parameter collecting cassette three part, as shown in Figure 1.Monitoring host computer realizes operating system, Database Systems, the control of application system multilevel security.Realize the functions such as Monitoring Data record, display, data analysis, data query, system management.Monitoring means realizes collection and the measurement of photovoltaic generating system AC-DC parameter.Environmental parameter collecting cassette realizes the collection of temperature, solar irradiance and wind speed and uploads.Monitoring means, environmental parameter collecting cassette utilize RS485 bus to communicate with monitoring host computer.
Monitoring means primarily of LPC2368ARM processor, ac sensor and signal conditioning circuit, ADE7880 high-precision measuring chip, direct current transducer and signal conditioning circuit, AD sampler, liquid crystal touch display screen composition, as shown in Figure 2.
LPC2368 microcontroller is as control core of the present utility model, for realizing the control to LCD touch screen, the initialization of ADE7880 and the acquisition of related measurement data, storage, and with the communication of monitoring host computer, ADE7880 three-phase high-accuracy multifunctional computation chip, realize collection and the measurement of photovoltaic generating system alternating-current parameter, AD sampler realizes the collection of DC parameter, and liquid crystal touch display screen realizes the display on the spot of photovoltaic generating system operational factor.
Signal conditioning circuit major function be by analog signal after filtering, amplify, etc. link be adjusted to ADE7880 input required by scope.What have the greatest impact to measurement result is sampling precision, and ADE7880 chip ensure that the sampling precision of signal on internal hardware, digital filter add the certainty of measurement further increasing chip.In order to eliminate the non-linear and precision of external sensor to the impact of measurement result, the utility model adopts resistance pressure-dividing network to realize voltage signal sampling, sampling resistor adopts high stable, temperature floats little precision resistance, and utility model RC frequency overlapped-resistable filter carries out filtering process to signal, voltage signal passage as shown in Figure 3.
In figure, the amplitude of output voltage signal is:
V = 3 R 2 R 1 + R 2 = 3 1 1 + 1000 = 0.381 ( V ) - - - ( 1 )
Be less than ADE7880 maximum input signal amplitude 0.5V.Anti-aliasing low pass filter for being set to 8kHz according to corner frequency value, calculating according to formula (2) and chooses low pass filter resistance value R=1k Ω, C=22nF.
f 0 = 1 2 π R C = 8000 - - - ( 2 )
TVS is that overvoltage protection prevents electrical network instantaneous pressure from causing damage to circuit, and magnetic bead is for absorbing the High-frequency Interference from electrical network.
Current channel adopts copper-manganese sheet to sample to current signal, and current signal is sampled as voltage signal by copper-manganese and after amplifying, is input to ADE7880 electric current leads to, as shown in Figure 3.
In the utility model, copper-manganese sampling resistor adopts 1 milliohm, and after precise amplifying circuit carries out 6 times of amplifications to signal, the electric current being input to ADE7880 through follow-up anti-aliasing filter process leads to, and magnetic bead is for absorbing the High-frequency Interference from electrical network.
ADE7880 has three serial port interface: complete I2C interface, a Serial Peripheral Interface (SPI) (SPI) and a high-speed data acquisition port (HSDC) perhaps.ADE7880 has four kinds of mode of operations (normal-power mode, consumption reduction pattern, low-power consumption mode, park mode), and concrete pattern is by the Determines of PM0 and PM1 pin.During due to employing HSDC interface, microcontroller can only be operated in slave mode, in order on the basis meeting acquisition speed, improve the flexibility of data acquisition, the utility model adopts the SPI Interface realization of LPC2368 and the SPI interface communication of ADE7880, and the SPI of LPC2368 is operated in host mode.The elementary diagram of LPC2368 and ADE7880 as shown in Figure 4.In Fig. 5, P1.19, P1.20 of LPC2368 are connected with PM0, PM1 of ADE7880 respectively, for the mode of operation of control ADE7880.
Environmental parameter collecting cassette hardware
Environmental parameter collecting cassette is made up of MSP430 processor, temperature sensor, irradiance sensor, air velocity transducer etc., as shown in Figure 6.
MSP430 processor is as the control core of collecting cassette, for realize initialization to transducer, control, measurement and and the communication of monitoring host computer, irradiance sensor, temperature sensor, air velocity transducer realize the collection of the environmental parameters such as solar irradiance, assembly temperature, ambient temperature and wind speed.
In conjunction with the utility model of the photovoltaic generating system system monitoring system of LPC2368, ADE7880, direct current sampling, environmental parameter collecting cassette, this device utilizes LPC2368 controller to control collection to photovoltaic system on-site generated power system alternating current-direct current data, by can to Monitoring Data collection, analysis, process, inquiry with monitoring host computer.By testing results on the spot, this device can not only gather routine datas such as photovoltaic generating system voltage, electric current, power, generating efficiency, environmental parameters, the power quality parameters such as photovoltaic generating system harmonic wave, power factor, percent harmonic distortion can also be monitored, grasp the current operating conditions of electricity generation system, Timeliness coverage exception is also taken measures.This device can not only be used for the monitoring of photovoltaic generating system, also can also for the monitoring field of other qualities of power supply.
The utility model software program portion is well known to those skilled in the art.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and aim, scope of the present utility model is by claim and equivalents thereof.

Claims (8)

1. for a monitoring means for photovoltaic generating system monitoring device, it is characterized in that, comprising: monitoring processor, ac sensor, the first signal conditioning circuit and computation chip;
Ac sensor signal input part connects photovoltaic generating system ac signal output, described ac sensor signal output part connects the first signal conditioning circuit signal input part, described first signal conditioning circuit signal output part connects computation chip signal input part, described computation chip signal interaction end connects monitoring processor signal interaction end, and described monitoring processor display end connects display unit display end.
2. the monitoring means for photovoltaic generating system monitoring device according to claim 1, is characterized in that, also comprise: direct current transducer, secondary signal modulate circuit, AD sampler;
Direct current transducer signal input part connects photovoltaic generating system DC signal output, described direct current transducer signal output part connects secondary signal modulate circuit signal input part, described secondary signal modulate circuit signal output part connects AD sampler signal input part, described AD sampled signal interaction end connects monitoring processor signal interaction end, and described monitoring processor display end connects display unit display end.
3. the monitoring means for photovoltaic generating system monitoring device according to claim 1, is characterized in that, described first signal conditioning circuit comprises: voltage channel circuit and current channel circuit;
Described voltage channel circuit comprises: voltage input end connects first inductance one end, the described first inductance other end connects first resistance one end, the described first resistance other end connects second resistance one end and first electric capacity one end respectively, ground connection after the described second resistance other end is connected with the first electric capacity other end, described first electric capacity one end also connects computation chip signal input part and overvoltage protection diode negative pole respectively;
Described current channel circuit comprises: current input terminal connects the 4th resistance one end and the 3rd inductance one end respectively, the described 4th resistance other end connects second inductance one end, the described 3rd inductance other end connects AD converter electrode input end, the described second inductance other end connects AD converter negative input, and described AD converter output connects computation chip signal input part.
4. the monitoring means for photovoltaic generating system monitoring device according to claim 1 and 2, is characterized in that, described monitoring processor is LPC2368.
5. the monitoring means for photovoltaic generating system monitoring device according to claim 1, is characterized in that, described computation chip is ADE7880.
6. the monitoring means for photovoltaic generating system monitoring device according to claim 1 and 2, is characterized in that, described display unit is liquid crystal touch display screen.
7. the monitoring means for photovoltaic generating system monitoring device according to claim 3, is characterized in that, described overvoltage protection diode is TVS diode.
8. the monitoring means for photovoltaic generating system monitoring device according to claim 3, is characterized in that, described 4th resistance is copper-manganese sampling resistor.
CN201520845667.1U 2015-10-28 2015-10-28 A monitor cell for photovoltaic power generation system monitoring devices Active CN205160469U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108599231A (en) * 2018-01-20 2018-09-28 西南石油大学 Wind-solar-diesel complementary power generation family monitoring system based on LabVIEW
CN113466554A (en) * 2021-06-18 2021-10-01 国网宁夏电力有限公司电力科学研究院 Photovoltaic harmonic monitoring system based on electric energy metering chip

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108599231A (en) * 2018-01-20 2018-09-28 西南石油大学 Wind-solar-diesel complementary power generation family monitoring system based on LabVIEW
CN113466554A (en) * 2021-06-18 2021-10-01 国网宁夏电力有限公司电力科学研究院 Photovoltaic harmonic monitoring system based on electric energy metering chip

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