CN105281439A - Photovoltaic power generating computer measuring control system - Google Patents

Abstract

<b>The present invention relates to the technical field of photovoltaic power generation metering equipment, which is a photovoltaic power generation computer metering control device, including a metering control center, at least one photovoltaic power grid and at least one user power grid, and each photovoltaic power grid is connected to at least A user grid, each user grid is electrically connected to a smart meter that can detect the current value, voltage value, and power consumption, and can output the detected data through wireless signals; each photovoltaic power grid is electrically connected to at least one Photovoltaic power meter. The present invention can obtain the power generation of all photovoltaic power grids and the power consumption of all user power grids in real time through the metering control center, so as to realize real-time monitoring and metering of the power generation and power consumption process, so that it can realize the system when necessary. Scheduling and deployment, so as to ensure the stability of the user's power grid;</b><b>It is configured in a distributed manner, which can improve the accuracy of load forecasting and line loss forecasting. </b>

Description

Photovoltaic power generation computer measurement control system

technical field

The invention relates to the technical field of photovoltaic power generation metering equipment, and relates to a photovoltaic power generation computer metering control device.

Background technique

Photovoltaic power generation exists as a new energy source, which greatly improves resource reuse and helps save resources and energy. Due to the distributed characteristics of photovoltaic power generation, it is very necessary to monitor photovoltaic power generation, especially the instability of photovoltaic power consumption, which leads to the inconvenience of monitoring and measurement between photovoltaic power consumption and power generation, and the supervision office cannot accurately obtain measurement data, and Real-time monitoring is not possible. At present, the electricity consumption of household users is usually measured by directly checking the meter or using a digital chip card for metering. In the specific operation, the on-site meter reading work is labor-intensive and quite inconvenient; there are also some shortcomings in the use of digital chip card card measurement. , which has high requirements for cards and has a certain cost of card production, which is not applicable in some places.

Contents of the invention

The invention provides a photovoltaic power generation computer metering control device, which overcomes the shortcomings of the above-mentioned prior art, and can effectively solve the inconvenience of monitoring and metering existing in photovoltaic power generation and photovoltaic power consumption, and the supervisory office cannot accurately obtain metering data, and The problem of not being able to monitor in real time.

The technical solution of the present invention is achieved through the following measures: a photovoltaic power generation computer metering control device, including a metering control center, at least one photovoltaic power grid and at least one user power grid, each photovoltaic power grid is connected to at least one User grid, each user grid is electrically connected with a smart meter that can detect current value, voltage value and power consumption, and can output the detected data through wireless signals; each photovoltaic power grid is electrically connected with at least one photovoltaic power grid Power generation measuring instruments, each photovoltaic power grid corresponds to at least one concentrator capable of sending wireless signals, and the signal output terminals of each photovoltaic power generation measuring instrument are electrically connected to the signal input terminals of the corresponding concentrators through the data bus; The control center is equipped with a metering wireless communication module that can respectively send and receive wireless signals with the smart meter and the concentrator.

Below is the further optimization or/and improvement to above-mentioned technical scheme of the invention:

The above metering control center can also be equipped with data processing control server, communication interface, memory, control input module, power supply module, GPRS communication module, LED display, clock circuit and pulse output, communication interface, memory, metering wireless communication module, control The input module, the power supply module, the GPRS communication module, the LED display, the clock circuit and the pulse output are respectively electrically connected with the data processing control server.

An integrated metering chip can also be electrically connected to the above-mentioned data processing control server, and a voltage divider circuit and an instrument current transformer are electrically connected between the integrated metering chip and the user grid.

A detection unit, a data processing unit, and a wireless communication module of the electric meter may be arranged in the above-mentioned smart electric meter. The signal input terminals of the electric meter are electrically connected together; the wireless communication module of the electric meter is a GPRS module.

The above-mentioned photovoltaic power generation measuring instrument can be provided with a main control chip, an Ethernet interface and a transparent forwarding module. The Ethernet interface and the transparent forwarding module are electrically connected to the main control chip respectively. Query the display screen, and the Ethernet interface is also electrically connected to the data bus through the firewall; the transparent forwarding module is electrically connected to an inverter chromatography analyzer, an intelligent DC screen, a voltmeter and a GPRS communication module.

The above-mentioned data bus can be an RS-485 bus, and the concentrator is built with a W77E58 single-chip microcomputer and a TC35 wireless communication module.

The invention has a reasonable and compact structure and is easy to use. It can obtain the power generation of all photovoltaic power grids and the power consumption of all user power grids in real time through the metering control center, so as to realize real-time monitoring and metering of the power generation and power consumption process, so as to facilitate Based on this, it can realize system scheduling and deployment when necessary, so as to ensure the stability of the user's power grid; it adopts distributed configuration to achieve optimal resource allocation, and can improve the accuracy of load prediction and line loss prediction, and can Realize remote control, which can monitor the power generation and equipment status of multiple photovoltaic power stations. At the same time, it is convenient to monitor the user's power grid, and can perform balance control when necessary, which helps to improve the effective monitoring of photovoltaic power grid power generation and power consumption. and system usage effects.

Description of drawings

Accompanying drawing 1 is the circuit block diagram of the preferred embodiment of the present invention.

The codes in the drawings are: 1 is the metering control center, 2 is the photovoltaic power grid, 3 is the user power grid, 4 is the smart meter, 5 is the photovoltaic power meter, 6 is the concentrator, 7 is the metering wireless communication module, 8 is the data processing control server, 9 is the communication interface, 10 is the memory, 11 is the control input module, 12 is the GPRS communication module, 13 is the LED display, 14 is the clock circuit, 15 is the pulse output, 16 is the integrated metering chip, 17 is Voltage divider circuit, 18 is an instrument current transformer, 19 is a detection unit, 20 is a data processing unit, 21 is a meter wireless communication module, 22 is a main control chip, 23 is an Ethernet interface, 24 is a transparent forwarding module, 25 26 is a power query display screen, 27 is a firewall, 28 is an inverter chromatography analyzer, 29 is an intelligent DC screen, 30 is a voltmeter, 31 is a W77E58 single-chip microcomputer, and 32 is a TC35 wireless communication module , 33 is a power module, and 34 is a data bus.

detailed description

The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.

Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:

As shown in Figure 1, the photovoltaic power generation computer metering control device includes a metering control center 1, at least one photovoltaic power generation grid 2 and at least one user power grid 3, each photovoltaic power generation power grid 2 is connected to at least one user power grid 3, Each user grid 3 is electrically connected to a smart meter 4 that can detect current values, voltage values, and power consumption, and can output the detected data through wireless signals; each photovoltaic power grid 2 is electrically connected to at least one photovoltaic power grid. Each photovoltaic power generation grid 2 corresponds to at least one concentrator 6 capable of sending wireless signals, and the signal output ends of each photovoltaic power generation meter 5 are connected to the signal input ends of the corresponding concentrator 6 through the data bus 34 Electrically connected together; the metering control center 1 is equipped with a metering wireless communication module 7 capable of transmitting and receiving wireless signals with the smart meter 4 and the concentrator 6 respectively. During use, the power consumption of each user grid 3 will be collected by the smart meter 4 and transmitted to the metering control center 1 through wireless signals, and the power generation of each photovoltaic power grid 2 will also be collected by the photovoltaic power meter 5, And send a wireless signal to the metering control center 1 through the concentrator 6, so that the metering control center 1 can obtain the power generation of all photovoltaic power grids 2 and the power consumption of all user power grids 3 in real time, so as to realize the power generation and power consumption process. Real-time monitoring and metering, so that it can realize system scheduling and deployment when necessary, so as to ensure the stability of the user grid 3 . According to requirements, the smart meter 4 can adopt the existing known technology; the photovoltaic power generation meter 5 and the concentrator 6 can adopt a one-to-one or many-to-one correspondence. The present invention adopts distributed configuration to realize optimal resource configuration, and can improve the accuracy of load prediction and line loss prediction, and can realize remote control, which can monitor the power generation and equipment status of multiple photovoltaic power stations , and at the same time, it is convenient to monitor the user grid 3, and balance control can be performed when necessary, which helps to improve the effective monitoring of photovoltaic grid power generation and power consumption and system use effects.

According to actual needs, the above-mentioned photovoltaic power generation computer metering control device can be further optimized or/and improved:

As shown in accompanying drawing 1, also be provided with data processing control server 8, communication interface 9, memory 10, control input module 11, power supply module 33, GPRS communication module 12, LED display 13, clock circuit 14 and Pulse output 15, communication interface 9, memory 10, measurement wireless communication module 7, control input module 11, power supply module 33, GPRS communication module 12, LED display 13, clock circuit 14 and pulse output 15 are connected with data processing control server 8 respectively connected. When in use, the data processing control server 8 can realize two-way data transmission between the metering wireless communication module 7 or/and GPRS communication module 12, the concentrator 6 and the smart meter 4, thereby obtaining the power generation data of the photovoltaic power grid 2 and the user grid 3, and then through the data analysis and calculation of the data processing control server 8 and the integrated metering chip 16, the relevant information will be displayed on the LED display 13. According to requirements, the measurement wireless communication module 7 can be a TC35 module, and the data processing control server 8 can be a PC. The TC35 module supports a standard RS-232 interface. When it is connected to a PC, the TC35 module can be connected to The CMOS level of the PC is converted into the RS-232 level of the PC and then connected to the serial port of the PC to communicate with the PC normally.

As shown in FIG. 1 , the data processing control server is also electrically connected to an integrated metering chip 16 , and a voltage divider circuit 17 and an instrument current transformer 18 are electrically connected between the integrated metering chip 16 and the user grid 3 . In actual use, except for the error of the smart meter, which can be adjusted to the minimum error at the load point, the errors of other measurement values are related to the actual operating parameters of the secondary circuit; according to the errors of current and voltage transformers, a reasonable combination Pairing, so that the combined error of the transformer is as small as possible; the principle of matching is to use the current transformer and the voltage transformer as much as possible. It can be neglected, and the comprehensive error of the metering device can be reduced to the greatest extent only by adjusting according to the secondary voltage drop error of the transformer and the error of the electric energy meter itself; the voltage used can be measured through the voltage divider circuit 17 . According to requirements, both the voltage divider circuit 17 and the instrument current transformer 18 can adopt existing known technologies.

As shown in accompanying drawing 1, be provided with detection unit 19, data processing unit 20 and ammeter wireless communication module 21 in smart meter 4, the signal output end of detection unit 19 is electrically connected with the signal input end of data processing unit 20, data The signal output end of the processing unit 20 is electrically connected with the signal input end of the electric meter wireless communication module 21; the electric meter wireless communication module 21 is a GPRS module. In this way, two-way communication can be realized between photovoltaic users and the metering control center 1 . According to requirements, the wireless communication module 21 of the electric meter can also be other existing known technologies.

As shown in Figure 1, the photovoltaic power generation measuring instrument 5 is provided with a main control chip 22, an Ethernet interface 23 and a transparent forwarding module 24, and the Ethernet interface 23 and the transparent forwarding module 24 are respectively electrically connected to the main control chip 22, The Ethernet interface 23 is electrically connected to the workstation 25 and the power query display screen 26, and the Ethernet interface 23 is also electrically connected to the data bus 34 through the firewall 27; the transparent forwarding module 24 is electrically connected to the inverter chromatographic analysis Instrument 28, intelligent DC panel 29, voltmeter meter 30 and GPRS communication module 12. Among them, the GPRS communication module 12 can be used as a spare wireless signal transmission module of the photovoltaic power generation meter 5. When the concentrator 6 fails and cannot send wireless signals, the GPRS communication module 12 can be directly enabled, thereby ensuring uninterrupted data transmission and simple operation. It is easy to use, and thus when collecting the power generation data of the photovoltaic power grid 2 , the relevant data can be directly displayed on site, which is convenient for the two places to read relevant information separately. According to requirements, the photovoltaic power generation measuring instrument 5 can adopt a 32-bit embedded system as the main control chip 22, and use Intel's network chip to process 100M Ethernet information; the photovoltaic power generation measuring instrument 5 is installed on the photovoltaic equipment operation site, and its main function is to The data collected by various photovoltaic devices (such as inverter chromatography analyzer 28, intelligent DC screen 29, voltmeter 30, etc.) adopts transparent forwarding technology, and transmits real-time information through 100M Ethernet or other auxiliary transmission networks (such as GPRS module) The photovoltaic power generation measuring instrument 5 supports NAT address forwarding, which can solve the problem of insufficient IP addresses of network equipment; it has a firewall 27 function, which can prevent network data from intruding; Sending back information returned by smart devices, in addition to configuring the basic communication information of each device; the built-in NAT firewall 27 filters the information of the upper network, and the NAT address forwarding module can automatically assign IP addresses to smart devices with Ethernet interfaces 23 to solve IP problems. The problem of address occupation; the user can configure and manage the parameters of the photovoltaic power generation meter 5 through the built-in WEB service of the device.

As shown in Figure 1, the data bus 34 is an RS-485 bus, and the concentrator 6 is equipped with a W77E58 single-chip microcomputer 31 and a TC35 wireless communication module 32. According to requirements, the TC35 wireless communication module 32 can be produced by Siemens.

The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and non-essential technical features can be increased or decreased according to actual needs to meet the needs of different situations.

Claims (10)

1. a photovoltaic generation Computer amount control device, it is characterized in that comprising measure control center, at least one photovoltaic generation electrical network and at least one consumer networks, each photovoltaic generation electrical network all has access at least one consumer networks, each consumer networks is all electrically connected with and can detects current value, magnitude of voltage and power usage and the intelligent electric meter that exported by wireless signal of the data that can be detected; Each photovoltaic generation electrical network is all electrically connected with at least one photovoltaic generation gauge, each photovoltaic generation electrical network is all to the concentrator that at least one should be had to send wireless signal, and the signal output part of each photovoltaic generation gauge is all electrically connected by the signal input part of data/address bus with corresponding concentrator; In measure control, intracardiac being provided with can carry out the metering wireless communication module of wireless signal transmitting-receiving with intelligent electric meter and concentrator respectively.

2. photovoltaic generation Computer amount control device according to claim 1, it is characterized in that intracardiacly in measure control being also provided with data processing and control server, communication interface, memory, control inputs module, power module, GPRS communication module, light-emitting diode display, clock circuit and pulse export, communication interface, memory, metering wireless communication module, control inputs module, power module, GPRS communication module, light-emitting diode display, clock circuit and pulse export and are electrically connected with data processing and control server respectively.

3. photovoltaic generation Computer amount control device according to claim 2, it is characterized in that data processing and control server is also electrically connected with integrating metrology chip, between integrating metrology chip and consumer networks, be electrically connected with voltage branch circuit and instrument current transformer.

4. the photovoltaic generation Computer amount control device according to claim 1 or 2 or 3, it is characterized in that in intelligent electric meter, being provided with detecting unit, data processing unit and ammeter wireless communication module, the signal output part of detecting unit and the signal input part of data processing unit are electrically connected, and the signal output part of data processing unit and the signal input part of ammeter wireless communication module are electrically connected; Ammeter wireless communication module is GPRS module.

5. the photovoltaic generation Computer amount control device according to claim 1 or 2 or 3, it is characterized in that in photovoltaic generation gauge, being provided with Master control chip, Ethernet interface and transparent forwarding module, Ethernet interface and transparent forwarding module are electrically connected with Master control chip respectively, Ethernet interface is electrically connected with station machine and electricity quantity inquiring display screen, and Ethernet interface is also electrically connected by fire compartment wall and data/address bus; Transparent forwarding module is electrically connected with inverter chromatograph, intelligent d. c screen, voltmeter meter and GPRS communication module.

6. photovoltaic generation Computer amount control device according to claim 4, it is characterized in that in photovoltaic generation gauge, being provided with Master control chip, Ethernet interface and transparent forwarding module, Ethernet interface and transparent forwarding module are electrically connected with Master control chip respectively, Ethernet interface is electrically connected with station machine and electricity quantity inquiring display screen, and Ethernet interface is also electrically connected by fire compartment wall and data/address bus; Transparent forwarding module is electrically connected with inverter chromatograph, intelligent d. c screen, voltmeter meter and GPRS communication module.

7. the photovoltaic generation Computer amount control device according to claim 1 or 2 or 3, is characterized in that data/address bus is RS-485 bus, and concentrator is built-in with W77E58 type single-chip microcomputer and TC35 type wireless communication module.

8. photovoltaic generation Computer amount control device according to claim 4, is characterized in that data/address bus is RS-485 bus, and concentrator is built-in with W77E58 type single-chip microcomputer and TC35 type wireless communication module.

9. photovoltaic generation Computer amount control device according to claim 5, is characterized in that data/address bus is RS-485 bus, and concentrator is built-in with W77E58 type single-chip microcomputer and TC35 type wireless communication module.

10. photovoltaic generation Computer amount control device according to claim 6, is characterized in that data/address bus is RS-485 bus, and concentrator is built-in with W77E58 type single-chip microcomputer and TC35 type wireless communication module.