JP2014011863A - Photovoltaic power generation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photovoltaic power generation system which makes it possible to easily add a system facility to be monitored to electric apparatuses which are classified into respective systems in a house, as the number of system facilities increases; and shows how much and at which place power is consumed, so as to be easily understood.SOLUTION: A photovoltaic power generation system comprises: a solar cell module unit; a power conditioner device unit comprising a function for converting DC output from a solar cell module to AC; and a distribution board for connecting a power conditioner device and a system from an electric power company and connecting a domestic load which is an electric appliance in the house with the power conditioner device and the system from the electric power company. The photovoltaic power generation system also comprises: a detection sensor and detection device which can be added when necessary; and a display device which can display and confirm power consumption for each system in the house when the detection device is added.

Description

  The present invention relates to a solar power generation system, and more particularly to a solar power generation system including a display device that displays a power generation amount, a power usage amount, a power sale amount, a power purchase amount, and the like.

  In recent years, the trend of all-electric homes, which electrify all home appliances, is becoming prominent. And as part of this, there is a flow of private power generation by a solar power generation system.

  A conventional solar power generation system is a display monitor installed indoors, and can understand the total power generation amount, the total power usage amount, the power sale amount, the power purchase amount, and the like.

  Further, in Patent Document 1, in a distribution board to which a power conditioner and a commercial power supply are connected, a sensor unit for detecting power and an interface device for wireless transmission to a display device such as a personal computer are arranged in the distribution board. It is. In addition, a wireless module with a built-in detection sensor is installed in a household outlet, and by connecting an electrical device, the power of the device is individually transmitted to the display device and displayed.

JP 2001-268801 A

  In general household distribution boards, breakers for earth leakage and overcurrent protection are provided for each system in the home, such as living rooms, kitchens, air conditioners, and the first and second floors. However, the contents displayed on the display device of the conventional solar system are the total power generation amount of the solar module, the total power consumption consumed by the entire household, and the power sales value (the amount of power sold, The amount of power used for each system is not displayed.

  In addition, in Patent Document 1, although the power of each device can be confirmed individually by using a wireless module with a built-in detection sensor in each outlet, this purpose is to confirm the power consumption of each individual device. Although it is possible to install all outlets, it is very expensive.

  This invention is made in view of the above subject, and it aims at enabling it to distinguish and display the power consumption of each system | strain on the display apparatus of a photovoltaic power generation system.

  The above-described problems include a solar cell module that receives light and outputs DC power, a power conditioner that converts DC power into AC power, and AC power from the power conditioner or AC power from a commercial power supply. A distribution board for supplying the home load, a plurality of sensors for measuring the current flowing to each of the plurality of home loads, a detection device to which outputs of the plurality of sensors are input, and the plurality of sensors It solves by the solar power generation system provided with the display apparatus which displays the power consumption of each household load calculated based on the output from.

  ADVANTAGE OF THE INVENTION According to this invention, the power consumption of each system | strain can be distinguished and displayed on the display apparatus of a photovoltaic power generation system.

It is a figure explaining the structure of the solar energy power generation system of one Example. It is a figure explaining the detailed structure of the electricity distribution panel of one Example. It is the example 1 of a display of the display apparatus of one Example. It is the example 2 of a display of the display apparatus of one Example.

  Embodiments of the present invention will be described below with reference to FIGS.

  FIG. 1 shows a configuration diagram of the photovoltaic power generation system of this embodiment. In FIG. 1, reference numeral 1 denotes a solar cell module that receives light and outputs DC power. Reference numeral 3 denotes a power conditioner having an inverter function for converting DC power into AC power. A connection device 2 connects the solar cell module 1 and the power conditioner 3. Reference numeral 4 denotes a distribution board that supplies AC power from the power conditioner 3 or the commercial power source 9 to the home load 7 provided with the outlet 10. The distribution board 4 is connected to a plurality of detection devices 5 (5a to 5x) that detect power consumption of a plurality of home loads 7 (7a to 7x). In addition, although the example provided with the household load 7a-7x and the detection apparatuses 5a-5x was shown here, as mentioned later, these do not need to be the same number. Reference numeral 6 denotes a display device that performs data communication with the detection device 5 wirelessly. A power meter 8 connects the commercial power supply 9 and the distribution board 4.

  The detection device 5 and the display device 6 each have a built-in wireless communication device that performs data communication, and the data transmitted from the detection device 5 can be received by the display device 6 at a remote location. Moreover, the detection apparatus 5 can be expanded (5a-5x) according to the number of systems in the house.

  FIG. 2 shows a detailed configuration of the distribution board 4. The distribution board 4 includes a power conditioner 3, a plurality of detection devices 5, a home load 7a (to home appliance 1 in the living room), 7b (home appliance 2 to the first-floor air conditioner), 7c (home appliance 3 in the bathroom) F), 7d (to home appliance 42 second floor air conditioner), 7e (to home appliance 52 second floor room), and connection of power meter 8 are aggregated. Further, the distribution board 4 is provided with protective breakers such as a main breaker 21, an in-home main breaker 22, an interconnection breaker 23, in-home load breakers 24a to 24e, and the in-home load breakers 24a to 24e The domestic loads 7a to 7e can be disconnected individually.

  Each detection device 5 is provided with a plurality of terminals for connecting the sensor 25. For example, the detection device 5a receives the output of the sensor 25a that detects the trading current with the commercial power supply 9 and the output of the sensor 25b that detects the generated current of the power conditioner 3, and the power conditioner 3 is output from the outputs of both sensors. And the power sold or purchased to the commercial power source 9 are calculated. Moreover, the output of the sensors 25c-25e which detect the electric current to the household loads 7a-7c is input into the detection apparatus 5b, and the power consumption of the household loads 7a-7c can be calculated. Furthermore, the detection device 5c receives the outputs of the sensors 25f and 25g that detect currents to the home loads 7d and 7e, and can calculate the power consumption of the home loads 7d and 7e. Although the configuration using three detection devices 5 has been described here, it is needless to say that a desired number of detection devices 5 can be used according to the number of sensors 25.

  Various types of power information obtained by calculation by the detection device 5 are transmitted to the display device 6 by wireless communication. 3 and 4 show display examples of the display device 6. As described above, the detection device 5 calculates the power of each system, and the data is finally periodically transmitted to the display device 6 by wireless communication. In the display example of FIG. 3, the power generation amount of the power conditioner 3 is 2.5 kW, the total power consumption of the household is 1.5 kW, the state due to the surplus of power is the power selling state, and the power selling power amount is 1.0 kW. It is an example.

  Further, according to the function of the display device 6, the specification is such that other monitoring data is displayed on and after the next page. In the display example of FIG. 4, the power consumption of the household load 7a (to home equipment 1 to the living room) is 0.1 kW, the power consumption of the home load 7b (home equipment 2 to the first floor air conditioner) is 1.0 kW, the home The internal load 7c (to home appliance 3 in the washroom) is 0.0 kW, and the power usage status of each system can be seen at a glance. In the example of FIG. 4, the power consumption of the three home loads 7a to 7c is displayed on one page. However, by displaying the power consumption of the home loads 7d and 7e on the next page, Even if the number of systems further increases, the power consumption of all systems can be displayed.

  In this embodiment, the communication specification between the detection device 5 and the display device 6 is wireless communication, but the same effect can be obtained even if it is implemented by wired communication. Further, each power is calculated by the detection device 5 from the detected current consumption value by the sensor 25 and the output voltage from the power conditioner 3, but the detected data is transmitted to the display device 6 as it is and the display device 6 Even if the calculation is performed and the display is performed, the same effect can be obtained.

  According to the present embodiment described above, the detection equipment can be easily added to the electrical equipment divided for each system in the home, even if the number of system facilities to be monitored increases. Since the display device 6 individually displays how much electricity is being used, the customer can easily understand the usage status of electricity and become more eco-friendly.

DESCRIPTION OF SYMBOLS 1 Solar cell module 2 Connection apparatus 3 Power conditioner 4 Distribution board 5, 5a-5x Detection apparatus 6 Display apparatus 7, 7a-7x Home load 8 Electric power meter 9 Commercial power supply 10 Outlet 21 Main breaker 22 Main breaker 23 for home use System breakers 24a-24e Home load breakers 25a-25g Sensors

Claims (5)

A solar cell module that receives light and outputs DC power;
A power conditioner that converts DC power into AC power;
AC power from the power conditioner, or a distribution board that supplies AC power from a commercial power source to a plurality of home loads,
A plurality of sensors for measuring current flowing to each of the plurality of home loads;
A detection device to which outputs of the plurality of sensors are input;
A photovoltaic power generation system comprising: a display device that displays power consumption of each household load calculated based on outputs from the plurality of sensors. In the photovoltaic power generation system according to claim 1,
The photovoltaic power generation system characterized in that the power consumption of each household load is calculated by the detection device or the display device. In the photovoltaic power generation system according to claim 1,
A photovoltaic power generation system comprising a plurality of the detection devices. In the photovoltaic power generation system according to claim 1,
The solar power generation system characterized in that the display device displays the power consumption of a plurality of household loads on each page and displays the power consumption of each household load over a plurality of pages. A solar cell module part in which a plurality of solar cell modules are formed in series and in parallel;
A power conditioner unit having a function of converting direct current output from the solar cell module into alternating current;
In a photovoltaic power generation system having a distribution board that connects a power conditioner and a system from an electric power company, and connects a household load that is an electric appliance in the home to a system from the power conditioner and the electric power company,
It is connected to the distribution board, is provided with a detection unit for detecting output voltage and output current consisting of solar power generation, and detecting current consumption as power selling power or power purchasing power on the system side. A solar power generation system.