CN109274118B - Distribution method of electric energy distribution system based on intelligent electric room - Google Patents
Distribution method of electric energy distribution system based on intelligent electric room Download PDFInfo
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- CN109274118B CN109274118B CN201811191795.3A CN201811191795A CN109274118B CN 109274118 B CN109274118 B CN 109274118B CN 201811191795 A CN201811191795 A CN 201811191795A CN 109274118 B CN109274118 B CN 109274118B
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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- Y—GENERAL 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention provides a distribution method of an electric energy distribution system based on an intelligent electric room, wherein the electric energy distribution system comprises a distributed photovoltaic power station, a factory photovoltaic power station, a step-up transformer, the intelligent electric room and a grid-connected cabinet; a switch electric cabinet, a metering electric cabinet and a collecting electric cabinet are arranged in the intelligent electric room; the distributed photovoltaic power stations comprise a plurality of residential rooftop photovoltaic power stations; the distributed photovoltaic power station, the step-up transformer, the switch electric cabinet and the metering electric cabinet are sequentially and electrically connected, and the factory photovoltaic power station, the metering electric cabinet and the grid-connected cabinet are all electrically connected with the collecting electric cabinet; the collecting electric cabinet is used for collecting and monitoring the generated energy and distributing and conveying the electric quantity to the grid-connected cabinet; the grid-connected cabinet is used for controlling electric energy to be transmitted to electric equipment or a public power grid of a factory according to the power utilization condition of the electric equipment of the factory. The distribution system and the distribution method can make full use of the electricity of the photovoltaic power stations on the roofs of residents around a factory, and can reduce the electricity charge of the factory.
Description
Technical Field
The invention relates to the technical field of power grids, in particular to a distribution method of an electric energy distribution system based on an intelligent electric room.
Background
The electricity consumption of factories in an industrial area is commercial and large in power consumption, so the electricity cost is high, in order to reduce the cost, a plurality of factories can choose photovoltaic power stations to be installed on roofs to reduce the electricity consumption, but under the normal condition, the electricity generation of the photovoltaic power stations cannot meet the requirements of the factories in many times, because the electricity generation of the photovoltaic power stations is influenced by weather and the structures of the roofs and is also influenced by surrounding obstacles to different degrees, although the electricity consumption of the factories to a public power grid is reduced to a great extent, the electricity consumption is not enough for the factories in many times.
With the great trend of energy conservation and emission reduction, more and more common families can install photovoltaic power stations on the roofs of the families, the photovoltaic power stations can play a role in shading and insulating heat and can generate electricity for use, and because the electricity consumption of the common families is not large, redundant electricity can be generated frequently and can enter a public power grid, and the electricity of the photovoltaic power stations can not be fully utilized.
If the factory can utilize the electricity of the photovoltaic power stations on the roofs of the surrounding resident buildings, the electricity charge cost can be further reduced, and the electricity of the photovoltaic power stations on the roofs of the resident buildings can be more fully utilized, so that the current trend of energy conservation and emission reduction is met.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a distribution method for an electric energy distribution system based on an intelligent electric room, which can make full use of the electricity of the photovoltaic power stations on the roofs of residents around a factory and reduce the electric charge of the factory.
In order to achieve the purpose, the invention adopts the following technical scheme:
an electric energy distribution system based on an intelligent electric room comprises a distributed photovoltaic power station, a factory photovoltaic power station, a step-up transformer, the intelligent electric room and a grid-connected cabinet arranged in a factory common electric room; a switch electric cabinet, a metering electric cabinet and a collecting electric cabinet are arranged in the intelligent electric room; the distributed photovoltaic power stations comprise a plurality of residential rooftop photovoltaic power stations; the distributed photovoltaic power station, the step-up transformer, the switch electric cabinet and the metering electric cabinet are sequentially and electrically connected, and the factory photovoltaic power station, the metering electric cabinet and the grid-connected cabinet are all electrically connected with the collecting electric cabinet; the collecting electric cabinet is used for collecting and monitoring the electricity generated by the distributed photovoltaic power stations and the factory photovoltaic power stations and distributing and conveying the electric quantity to the grid-connected cabinet; the grid-connected cabinet is used for controlling electric energy to be transmitted to electric equipment or a public power grid of a factory according to the power utilization condition of the electric equipment of the factory.
In the electric energy distribution system based on the intelligent electric room, the collecting electric cabinet is an intelligent grid-connected cabinet provided with an induction chip, and the induction chip is used for monitoring the change condition of the total electric quantity and controlling the discharge electric quantity to the grid-connected cabinet.
In the electric energy distribution system based on the intelligent electric room, an intelligent valve switch and a regulation and control chip are arranged in the grid-connected cabinet, and the regulation and control chip is used for controlling the intelligent valve switch to be connected with electric equipment or a public power grid of a factory and controlling the opening amount of the intelligent valve switch.
In the electric energy distribution system based on the intelligent electric room, the regulation and control chip is electrically connected with the induction chip.
In the electric energy distribution system based on the intelligent electric room, the regulation and control chip and the induction chip have a memory function, so that the actual electricity consumption of electric equipment in a factory can be recorded, and the electric power transmission can be allocated according to the record.
The electric energy distribution system based on the intelligent electric room further comprises an illumination sensor, and the illumination sensor is electrically connected with the regulation and control chip.
An electric energy distribution method is based on the electric energy distribution system based on the intelligent electric room, and comprises the following steps:
A. accessing a corresponding number of rooftop photovoltaic power stations according to the average power consumption of a factory, the average power generation of the factory photovoltaic power stations and the average power generation of the rooftop photovoltaic power stations, wherein the rooftop photovoltaic power stations form a distributed photovoltaic power station;
B. the electricity generated by the distributed photovoltaic power station is boosted by the boosting transformer and then is transmitted to the switch electric cabinet, the circuit is protected by the switch cabinet, and then the electric quantity is measured by the measuring electric cabinet;
C. electricity generated by the factory photovoltaic power station and electricity generated by the distributed photovoltaic power station are respectively transmitted to the electricity collecting cabinet through two grid-connected points;
D. the control chip controls the intelligent valve switch to be connected with the electric equipment or the public power grid of the factory at corresponding time according to the power consumption-time data and the meteorological data of the electric equipment of the factory, controls the opening amount of the intelligent valve switch and simultaneously sends power consumption information to the induction chip;
E. the induction chip controls the collecting electric cabinet to discharge the grid-connected cabinet with equal electric quantity according to the received power consumption information.
In the step D of the electric energy distribution method, the electricity consumption-time data is a corresponding relationship between electricity consumption and time, and when the electric energy distribution method is used for the first time, the electricity consumption-time data is preset data, and thereafter, the electricity consumption-time data is actual data recorded by the control chip.
In step D of the power distribution method, the meteorological data is data provided by a local meteorological office and/or NASA data.
In the step D of the electric energy distribution method, on-site meteorological data are collected through the illumination sensor and are used for correcting the meteorological data.
Has the advantages that:
the invention provides an electric energy distribution system distribution method based on an intelligent electric room, which accesses a corresponding number of roof photovoltaic power stations according to the average power consumption of a factory, the average power generation amount of the factory photovoltaic power stations and the average power generation amount of the roof photovoltaic power stations to form distributed photovoltaic power stations, the electricity generated by the distributed photovoltaic power stations and the factory photovoltaic power stations is collected by a collecting electric cabinet and then is transmitted to a grid-connected cabinet in a common electric room of the factory, and finally the grid-connected cabinet controls the transmission of the electric energy to electric equipment or a public power grid of the factory according to the electricity utilization condition of the electric equipment. The system and the method can make full use of the electricity of the photovoltaic power station on the roofs of residents around the factory and reduce the electricity charge cost of the factory.
Drawings
Fig. 1 is a schematic diagram of an intelligent electric room-based electric energy distribution system provided by the invention.
Fig. 2 is a control schematic diagram of the intelligent electric room-based electric energy distribution system provided by the invention.
Detailed Description
The invention provides a distribution method of an electric energy distribution system based on an intelligent electric room, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail below by referring to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-2, the electric energy distribution system based on the intelligent electric room provided by the invention comprises a distributed photovoltaic power station 1, a factory photovoltaic power station 2, a step-up transformer 3, an intelligent electric room a and a grid-connected cabinet 4 arranged in a factory common electric room; the intelligent electric room A is internally provided with a switch electric cabinet 5, a metering electric cabinet 6 and a collecting electric cabinet 7; the distributed photovoltaic power stations comprise a plurality of residential rooftop photovoltaic power stations; the distributed photovoltaic power station 1, the step-up transformer 3, the switch electric cabinet 5 and the metering electric cabinet 6 are electrically connected in sequence, and the factory photovoltaic power station 2, the metering electric cabinet 3 and the grid-connected cabinet 4 are electrically connected with the collecting electric cabinet 7; the collecting electric cabinet is used for collecting and monitoring the electricity generated by the distributed photovoltaic power stations and the factory photovoltaic power stations and distributing and conveying the electric quantity to the grid-connected cabinet; the grid-connected cabinet is used for controlling electric energy to be transmitted to electric equipment 90 or a public power grid 91 of a factory according to the power utilization condition of the electric equipment of the factory.
The electric energy distribution system can access a corresponding number of roof photovoltaic power stations according to the average power consumption of a factory, the average power generation of the factory photovoltaic power stations and the average power generation of the roof photovoltaic power stations to form a distributed photovoltaic power station, here, the roof photovoltaic power stations can be accessed in a redeeming mode (namely, electricity of installed resident roof photovoltaic power stations is purchased through the price lower than commercial power consumption), the electricity of the distributed photovoltaic power stations is boosted through a boosting transformer and then input into a switch cabinet for circuit protection, then input into a metering cabinet for metering the electric quantity so as to determine that the electric quantity purchased from the distributed photovoltaic power stations is convenient to charge, the electricity generated by the distributed photovoltaic power stations and the factory photovoltaic power stations is collected through a collecting cabinet and then transmitted to a grid-connected cabinet in a common electric room of the factory, and finally the grid-connected cabinet controls the electric energy to be transmitted to electric equipment or a public power grid of the factory according to the electricity utilization condition of the electric equipment (the redundant electricity input into the public power grid is used for power grid-connected cabinet Corresponding cost can be obtained), the system can make full use of the electricity of the photovoltaic power stations on the roofs of residents around the factory, and simultaneously can reduce the electricity cost of the factory.
Step-up transformer, the cabinet that is incorporated into the power networks, the electric cabinet of switch, the electric cabinet of measurement and the electric cabinet that gathers are prior art, can directly purchase from the market as required and obtain, do not describe its structure here in detail. As a general knowledge, the distributed photovoltaic power plant 1 and the factory photovoltaic power plant 2 are provided with inverters for converting direct current into alternating current, so that electricity to be supplied in the present electric power distribution system is alternating current.
Further, the electric collecting cabinet 7 is an intelligent grid-connected cabinet provided with an induction chip, and the induction chip is used for monitoring the change condition of the total electric quantity and controlling the discharge electric quantity to the grid-connected cabinet. The induction chip can be a single chip microcomputer, an MCU controller and the like. The electric cabinet that gathers can be according to the actual power consumption condition control electric quantity that discharges of the consumer of mill.
Furthermore, an intelligent valve switch and a regulation and control chip are arranged in the grid-connected cabinet 4, and the regulation and control chip is used for controlling the intelligent valve switch to be connected with electric equipment or a public power grid of a factory and controlling the opening amount of the intelligent valve switch. When power is required to be supplied to the electric equipment, the intelligent valve switch is controlled to switch on the electric equipment, and the opening amount of the intelligent valve switch is controlled according to the power consumption, so that the larger the power consumption of the electric equipment in a factory is, the larger the opening amount of the intelligent valve switch is, and the generated electric energy is ensured to be fully utilized. Here, the control chip may be a single chip microcomputer, an MCU controller, or the like, the opening amount refers to the amount of current that can flow through the intelligent valve switch under a certain transmission voltage, and the intelligent valve switch may be a bidirectional thyristor (e.g., a BTA41-600B bidirectional thyristor, a BTA41-700B bidirectional thyristor, a BTA41-800B bidirectional thyristor), or another control device having a current regulation function.
In this embodiment, the control chip is electrically connected to the sensing chip. The regulation and control chip can send power consumption information to the response chip, and the response chip gathers the electric quantity that discharges of electricity cabinet according to the control of received power consumption information, makes the electric quantity that discharges and power consumption equivalent, further improves the utilization ratio of electric energy.
Preferably, the regulation and control chip and the induction chip both have a memory function, and can record the actual power consumption of the electric equipment in a factory and allocate power transmission according to the record. The electric quantity output is controlled by utilizing the latest actual electricity utilization condition of the electric equipment, so that the electric quantity control is more accurate, and the electricity generated by the photovoltaic power station can be utilized to the maximum extent, and the self-consumption capacity is improved. In order to realize the memory function of the regulation chip and the induction chip, EEROM, FLASH and other memory memories which can not depend on electricity can be arranged on the regulation chip and the induction chip.
Furthermore, the electric energy distribution system based on the intelligent electric room further comprises an illumination sensor 8, and the illumination sensor is electrically connected with the regulation and control chip. The control chip regulates the working time of the intelligent valve switch (namely the time for supplying power to the power utilization equipment of a factory and transmitting power to a public power grid) according to the local actual solar illumination condition, the actual solar illumination condition is from meteorological data and/or NASA meteorological data provided by a local meteorological bureau, and the data usually has errors with the local actual condition, so that the meteorological data can be corrected through the data collected by the illumination sensor, the control accuracy can be further improved, and the electric energy can be more fully utilized.
The invention also provides an electric energy distribution method based on the intelligent electric room-based electric energy distribution system, which comprises the following steps:
A. and accessing a corresponding number of rooftop photovoltaic power stations according to the average power consumption of the factory, the average power generation of the factory photovoltaic power stations and the average power generation of the rooftop photovoltaic power stations, wherein the rooftop photovoltaic power stations form the distributed photovoltaic power station.
Specifically, the roof photovoltaic power station can be accessed in a redeeming mode, namely electricity of the installed resident roof photovoltaic power station is purchased at a price lower than commercial electricity, and compared with electricity using a public power grid, the electricity cost is lower.
B. The electricity that distributed photovoltaic power plant sent carries to the electric cabinet of switch after step up through step up transformer, protects the circuit through the switch cabinet, then carries out the electric quantity measurement through the electric cabinet of measurement.
Carry out the electric quantity measurement through measurement electricity cabinet, can confirm the electric quantity of purchasing from distributed photovoltaic power plant, conveniently charge.
C. The electricity generated by the factory photovoltaic power station and the electricity generated by the distributed photovoltaic power station are respectively transmitted to the electricity collecting cabinet through two grid-connected points.
The grid-connected point of the factory photovoltaic power station refers to an output point of the photovoltaic power station, and the grid-connected point of the distributed photovoltaic power station refers to an output point of the boosting transformer.
All set up independent point of being connected to before merging into intelligent electricity room respectively, the purpose of doing so is when the condition such as in order to appear tripping operation or trouble at one side, can carry out quick investigation work under the condition that does not influence normal power consumption, also can avoid simultaneously because the complicated condition of a series of influence circuit power consumptions such as tripping operation or short circuit that thunderstorm weather, circuit scheduling problem lead to can be better clear the reason that leads to breaking down is distributed photovoltaic power plant circuit or mill photovoltaic power plant circuit.
D. The control chip controls the intelligent valve switch to be connected with the electric equipment or the public power grid of the factory at corresponding time according to the power consumption-time data and the meteorological data of the electric equipment of the factory, controls the opening amount of the intelligent valve switch and simultaneously sends power consumption information to the induction chip.
The electricity consumption-time data is a corresponding relation between electricity consumption and time, when the electricity consumption-time data is used for the first time, the electricity consumption-time data is preset data, and then the electricity consumption-time data is actual data recorded by the control chip. The intelligent valve can be controlled to work by using the electric quantity-time data recorded in the previous day as the electric quantity-time data in the current day, and the intelligent valve can be controlled to work by using the average value of the electric quantity-time data recorded in the previous day as the electric quantity-time data in the current day, so that the control accuracy is improved.
The meteorological data is data and/or NASA data provided by a local meteorological office, and mainly refers to the change situation of sunlight illumination along with time, so that the time for switching on the electric equipment and the public power grid by the intelligent valve switch is controlled according to the sunlight illumination situation.
To improve the accuracy of the on-time control, on-site meteorological data may be collected by an illumination sensor and used to modify the meteorological data. And taking the collected actual solar illumination data as a reference value, and when the error between the meteorological data and the reference value exceeds a certain value, taking the reference value as a control basis for control.
E. The induction chip controls the collecting electric cabinet to discharge the grid-connected cabinet with equal electric quantity according to the received power consumption information.
Referring to fig. 2, the control process of the regulation chip, the induction chip and the intelligent valve switch is as follows:
1) the induction chip reads the total electric quantity data collected by the collecting electric cabinet;
2) the regulation and control chip analyzes and counts the collected total electric quantity data in combination with the power consumption-time data and the meteorological data;
3) the regulation chip derives the electric quantity consumption proportion according to the obtained data;
4) the regulation chip feeds data back to the induction chip for the induction chip to control the discharge electric quantity;
5) the control chip controls the intelligent valve to be switched on and switched off according to the obtained data so as to realize the step 6) or the step 7);
6) supplying power to the electric equipment of the factory according to the derived electric quantity consumption proportion to realize spontaneous self-use output;
7) and transmitting power to the public power grid according to the derived electric quantity consumption proportion and the corresponding time, and realizing the surplus power on-line output.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the protective scope of the present invention.
Claims (7)
1. A distribution method of an electric energy distribution system based on an intelligent electric room comprises a distributed photovoltaic power station, a factory photovoltaic power station, a step-up transformer, the intelligent electric room and a grid-connected cabinet arranged in a factory common electric room; a switch electric cabinet, a metering electric cabinet and a collecting electric cabinet are arranged in the intelligent electric room; the distributed photovoltaic power stations comprise a plurality of residential rooftop photovoltaic power stations; the distributed photovoltaic power station, the step-up transformer, the switch electric cabinet and the metering electric cabinet are sequentially and electrically connected, and the factory photovoltaic power station, the metering electric cabinet and the grid-connected cabinet are all electrically connected with the collecting electric cabinet; the collecting electric cabinet is used for collecting and monitoring the electricity generated by the distributed photovoltaic power stations and the factory photovoltaic power stations and distributing and conveying the electric quantity to the grid-connected cabinet; the grid-connected cabinet is used for controlling electric energy to be transmitted to electric equipment or a public power grid of a factory according to the power utilization condition of the electric equipment of the factory; the collecting electric cabinet is an intelligent grid-connected cabinet provided with an induction chip; an intelligent valve switch and a regulation and control chip are arranged in the grid-connected cabinet; the method is characterized by comprising the following steps:
A. accessing a corresponding number of rooftop photovoltaic power stations according to the average power consumption of a factory, the average power generation of the factory photovoltaic power stations and the average power generation of the rooftop photovoltaic power stations, wherein the rooftop photovoltaic power stations form a distributed photovoltaic power station;
B. the electricity generated by the distributed photovoltaic power station is boosted by the boosting transformer and then is transmitted to the switch electric cabinet, the circuit is protected by the switch cabinet, and then the electric quantity is measured by the measuring electric cabinet;
C. electricity generated by the factory photovoltaic power station and electricity generated by the distributed photovoltaic power station are respectively transmitted to the electricity collecting cabinet through two grid-connected points;
D. the control chip controls the intelligent valve switch to be connected with the electric equipment or the public power grid of the factory at corresponding time according to the power consumption-time data and the meteorological data of the electric equipment of the factory, controls the opening amount of the intelligent valve switch and simultaneously sends power consumption information to the induction chip;
E. the induction chip controls the collecting electric cabinet to discharge the grid-connected cabinet with equal electric quantity according to the received power consumption information.
2. The distribution method of the intelligent electric room-based electric energy distribution system according to claim 1, wherein the control chip is electrically connected with the sensing chip.
3. The distribution method of the electric energy distribution system based on the intelligent electric room as claimed in claim 2, wherein the control chip and the sensing chip have a memory function, and can record the actual power consumption of the electric equipment in the factory and allocate the electric power transmission according to the record.
4. The distribution method of the intelligent electric room-based electric energy distribution system according to claim 3, further comprising an illumination sensor electrically connected to the control chip.
5. The distribution method of the electric energy distribution system based on the intelligent electric room as claimed in claim 1, wherein in the step D, the electricity consumption-time data is a corresponding relation between electricity consumption and time, the electricity consumption-time data is preset data when the electric room is used for the first time, and the electricity consumption-time data is actual data recorded by the control chip.
6. The distribution method of the intelligent electric room-based electric energy distribution system according to the claim 1, wherein in the step D, the meteorological data is data provided by a local meteorological office and/or NASA data.
7. The distribution method of the intelligent electric room-based electric energy distribution system according to the claim 6, wherein in the step D, the on-site meteorological data is collected by the illumination sensor and is used for correcting the meteorological data.
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| CN109904851A (en) * | 2019-04-15 | 2019-06-18 | 广西大学 | A kind of photovoltaic DC distribution system and its electrical power distribution method |
| CN110611311B (en) * | 2019-09-26 | 2020-11-24 | 国核电力规划设计研究院有限公司 | Power distribution method and device for electric valve |
| CN110635512B (en) * | 2019-11-08 | 2024-01-30 | 广东德恒龙焱能源科技有限公司 | Building self-generating photovoltaic power station residual electricity internet construction system |
| CN111082462B (en) * | 2020-01-21 | 2022-02-25 | 南方电网科学研究院有限责任公司 | Standardized new forms of energy management system that is incorporated into power networks |
| CN113437758B (en) * | 2021-06-25 | 2022-07-26 | 安徽海螺建材设计研究院有限责任公司 | Photovoltaic grid-connected system and metering method for cement plant |
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