WO2019184609A1

WO2019184609A1 - Flexible domestic power supply system based on renewable energy and mains power supply

Info

Publication number: WO2019184609A1
Application number: PCT/CN2019/074908
Authority: WO
Inventors: 于越
Original assignee: 山东科技大学
Priority date: 2018-03-28
Filing date: 2019-02-13
Publication date: 2019-10-03
Also published as: CN108336732B; CN108336732A

Abstract

Disclosed is a flexible domestic power supply system based on renewable energy and a mains power supply, comprising: a power source controller; a plurality of load controllers having identical structures; a first live wire; and a second live wire. A first control switch unit of the power source controller consists of four switches. The four switches can realize selective access to renewable energy-generated power and mains power, and the first live wire or the second live wire can be selected for conveying said power. There are multiple load controllers. Each load controller is simultaneously connected to the first live wire and the second live wire. A second control switch unit of the load controller consists of two switches which enable selection of the first live wire or the second live wire for receiving power. The load controller can further determine, according to a type of a current load, which type of power is to be preferably selected for power supply. The present invention realizes alternative selection for a power supply and a domestic load, thereby enhancing power supply flexibility and reliability.

Description

A family flexible power supply system based on new energy and mains power supply

[0001] The present invention relates to a home flexible power supply system based on new energy and utility power supply.

Background technique

[0002] With the rapid development of new energy power generation technology, more and more new energy sources such as wind and light are connected to the home power supply system, forming a home microgrid. However, the current new energy access control equipment simply connects the new energy source with the mains power and then supplies power to the household load through a single fire line. This kind of power supply method cannot meet the requirements of diverse power sources in the home power supply system because the new energy power and the city power are not independent of each other. In addition, since the household load has different requirements on the power quality, the above power supply method cannot solve the problem of selecting the power access type by different household loads. In addition, since the new energy energy and the city power are connected together, the harmonics and voltage fluctuations in the new energy grid are likely to cause the power quality of the distribution network to decline, thus affecting the promotion of new energy in the home grid. Summary of invention

technical problem

Problem solution

Technical solution

[0003] The object of the present invention is to propose a home flexible power supply system based on new energy and mains power supply, so as to realize the two-way selection of the power supply and the household load and the standby of the power supply lines, thereby improving the flexibility of the power supply system and reliability.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A flexible home power supply system based on new energy and mains power supply, comprising a power controller, a plurality of load controllers of the same structure, a first fire line and a second fire line; wherein:

[0006] The power controller includes a No. 1 data processing unit, an No. 1 electric signal acquisition unit, and a No. 1 control switch unit; the No. 1 electric signal acquisition unit and the No. 1 control switch unit are respectively connected with the No. 1 data processing unit; [0007] The first control switch unit is composed of a first switch, a second switch, a third switch, and a fourth switch; [0008] a switch No. 1 configured to connect new energy energy to the No. 1 line of fire;

[0009] a switch No. 2 configured to connect new energy energy to the No. 2 line of fire;

[0010] a switch No. 3 configured to connect the utility power to the No. 1 line of fire;

[0011] a switch No. 4 configured to connect the utility power to the No. 2 line of fire;

[0012] The switching states of the first switch, the second switch, the third switch, and the fourth switch are all controlled by the first data processing unit;

[0013] The first electric signal collecting unit is configured to collect load data information of the first electric line and the second hot line when the utility electric energy or the new energy electric energy is supplied;

[0014] a carrier communication unit and/or a wireless communication unit are further connected to the first data processing unit;

[0015] The input ends of the respective load controllers are simultaneously connected to the No. 1 FireWire and the No. 2 FireWire;

[0016] The output of each load controller is connected to a type of load;

[0017] wherein, various types of loads are divided according to the self-characteristics of the load and the requirements of the power source during the running load;

[0018] Each load controller includes a second data processing unit, a second electric signal acquisition unit, and a second control switch unit; the second electric signal acquisition unit and the second control switch unit are respectively connected to the second data processing unit;

[0019] The second control switch unit is composed of a fifth switch and a sixth switch; wherein:

[0020] a switch No. 5 configured to access electrical energy on the first line of fire and to supply power to the corresponding load;

[0021] a switch No. 6, configured to access power of the No. 2 line and to supply power to the corresponding load;

[0022] The switch states of the fifth switch and the sixth switch are all controlled by the second data processing unit;

[0023] The second electric signal collecting unit is configured to collect data information of a load connected to the current load controller;

[0024] A carrier communication unit and/or a wireless communication unit are also connected to the second data processing unit.

[0025] Preferably, a keyboard and a display unit are further connected to the first data processing unit.

[0026] Preferably, a keyboard and a display unit are further connected to the second data processing unit.

[0027] Preferably, the electric signal collecting unit No. 1 comprises a voltage collecting unit and/or a current collecting unit.

[0028] Preferably, the second electric signal collecting unit comprises a voltage collecting unit and/or a current collecting unit. [0029] Preferably, the output of each load controller is connected to a type of load;

[0030] Among them, various types of loads are divided according to the characteristics of the load and the requirements of the power supply during the running load.

[0031] Preferably, the new energy energy includes wind energy or solar energy.

Advantageous effects of the invention

Beneficial effect

[0032] There are two fire lines in the present invention, namely, the first fire wire and the second fire wire, and the power controller has one. The first control switch unit of the power controller is composed of four switches, and can be realized by four switches. The new energy energy and the mains power are selected for access, and the connected power can also be selected through the No. 1 FireWire or the No. 2 FireWire. There are a plurality of load controllers in the present invention, and each load controller is simultaneously connected to the first fire line and the second hot line, and the second control switch unit of the load controller is composed of two switches, which can be selected by two switches. It is received from the No. 1 hot line or the No. 2 hot line. Of course, the load controller can also supply power according to the type of current load. The invention realizes the two-way selection between the two power supply sources and the power load and the standby of the power supply lines. Since the new energy and the commercial power in the present invention are independent of each other and do not interfere with each other, the requirements for the diverse power supply of the home power supply system are greatly satisfied. In addition, different power loads can be flexibly selected according to the required power quality. In addition, since the new energy is separated from the commercial power in the present invention, harmonics and voltage fluctuations in the new energy grid do not cause a decline in the power quality of the distribution network, and promote the promotion and application of new energy in the home power grid.

Brief description of the drawing

DRAWINGS

1 is a structural block diagram of a home flexible power supply system based on new energy and mains power supply according to an embodiment of the present invention;

2 is a structural block diagram of a power controller in an embodiment of the present invention;

3 is a structural block diagram of a load controller according to an embodiment of the present invention.

Invention embodiment

Embodiments of the invention [0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Embodiment 1

[0038] In combination with FIG. 1, a flexible home power supply system based on new energy and mains power supply includes a power controller, a plurality of load controllers, a first fire line L1, a second fire line L2, and a zero. Line N and a ground line E.

[0039] The function of the power controller is to select the access type of the power, for example, the new energy power access or the utility power access, and the power controller can also select whether the power accessed is the first fire line L1 or two. Fire line L2.

[0040] The new energy energy in the embodiment of the invention includes wind energy or solar energy and the like.

[0041] The following is a description of the necessity of two fire lines in this embodiment:

[0042] If there is only one live line in the home power supply system, since the new energy energy and the commercial power are independent of each other in the embodiment of the present invention, only one of the electric energy can be selected for power supply.

[0043] Since the household load has different quality requirements for electric energy, if the connected electric energy is new energy electric energy, all the whole hot lines go are new energy electric energy, and the high quality load of computers and printers can only select new ones. Energy supply, and harmonics, voltage fluctuations, etc. in the new energy grid will inevitably affect the normal operation of computers and printers.

[0044] Conversely, if the connected electrical energy is the mains electrical energy, if there is only one live wire, the new energy energy cannot be well utilized for some loads that are not of high quality for the electrical energy.

[0045] It can be seen that a fire line obviously cannot realize the flexible power supply requirements of new energy power and city power.

[0046] Based on this, it is very necessary for the present invention to select two live wires in order to realize flexible power supply of the power supply system.

As shown in FIG. 2, the power controller includes a data processing unit No. 1, an electric signal acquisition unit No. 1, and a control switch unit No. 1. The first electric signal acquisition unit and the first control switch unit are respectively connected to the first data processing unit.

[0048] The first control switch unit in the embodiment of the present invention is composed of four switches, which are a first switch, a second switch, a third switch, and a fourth switch. among them:

[0049] The first switch is configured to connect the new energy energy to the first fire line L1.

[0050] The second switch is configured to connect the new energy energy to the second fire line L2.

[0051] The third switch is configured to connect the utility power to the first fire line L1. [0052] The fourth switch is configured to connect the utility power to the second fire line L2.

[0053] The switching states of the No. 1 switch, the No. 2 switch, the No. 3 switch, and the No. 4 switch are all controlled by the No. 1 data processing unit.

[0054] By setting the above-mentioned No. 1 control switch unit, the selective access of the new energy electric energy and the commercial electric energy is realized, and in addition, which of the connected electric energy is transmitted through the hot line can also be flexibly selected.

[0055] For example, the present invention can realize simultaneous access of new energy electric energy and commercial electric energy through the above-mentioned No. 1 control switch unit, and the new energy electric energy and the commercial electric energy are respectively transported from one of the hot wires.

[0056] Of course, through the above-mentioned No. 1 control switch unit, only the access of the new energy energy can be realized, and the newly-connected new energy energy can be transported from the No. 1 FireWire L1 or the No. 2 FireWire L2.

[0057] The new energy energy that is connected can also be transported from both the first fire line L1 and the second fire line L2.

[0058] Through the above-mentioned No. 1 control switch unit, it is also possible to realize only the access of the mains electric energy, and the connected mains electric energy can be transported from the No. 1 FireWire L1 or the No. 2 FireWire L2.

[0059] The connected mains power can also be transmitted from the first line of fire line L1 and the second line of fire line L2.

[0060] The above-mentioned No. 1 control switch unit cooperates with two FireWires to ensure that the new energy source is not normal or has no mains access, and the home power supply network is not or substantially unaffected, thereby improving power supply flexibility.

[0061] The first electric signal collecting unit is configured to collect load data information on the first electric line L1 and the second hot line L2 when the mains electric energy or the new energy electric energy is supplied.

[0062] The electric signal acquisition unit of the first one may be a voltage collection unit or a current collection unit. Of course, the voltage collection unit and the current collection unit may also be included, as shown in FIG. 1 .

[0063] By collecting the voltage, current, and other power information on the first fire line L1 and the second fire line L2, the load data information connected to the first fire line L1 and the second fire line L2 is collected.

[0064] Of course, a keyboard and a display unit are also connected to the first data processing unit. The user can input a running command or query information to the power controller through the keyboard and the display unit.

[0065] A carrier communication unit is also connected to the first data processing unit. After the data information is processed by the No.1 data processing unit, it is used for switching control and monitoring protection of the power supply on the one hand, and data information is transmitted to each load controller through the carrier communication unit on the other hand, so that each load controller selects from the No. 1 fire line. Take power on L1 or No. 2 FireWire L2. [0066] Of course, a wireless communication unit, such as a Wifi unit or a Zigbee unit, is also connected to the No. 1 data processing unit. The data information is processed and sent to each load controller wirelessly.

[0067] In the embodiment of the present invention, the carrier communication unit and/or the wireless communication unit are used to facilitate different forms of networking between the power controller and each load controller, thereby facilitating the transmission of data information.

[0068] Based on this, in the first embodiment of the present invention, the first data processing unit controls the first switch, the second switch, the third switch, and the fourth switch, and the user has set, according to the collected current, voltage data information or communication. Three instructions.

[0069] The structure of each load controller is the same. The input terminals of each load controller are simultaneously connected to the first line of fire line L1 and the second line of fire line L2, and the output of each load controller is connected with a load.

[0070] Preferably, a type of load is connected at the output of each load controller.

[0071] Among them, various types of loads are divided according to the self-characteristics of the load and the requirements of the power source during the running load.

[0072] For example, the household load is divided according to the self-characteristics of the load and the requirements of the power load during the operation load, and the household load is divided into four categories by classification, namely, A, B, C, and D;

[0073] Class A load is a high demand for the power quality of the power source and a household load that is not frequently used;

[0074] Class B load is a household load that requires long-term operation;

[0075] Class C load is a household load of an electric water heater;

[0076] The Class D load is a household load that has a small load during standby but a large load during operation.

[0077] There are four load controllers, which are defined as load controllers No. 1, No. 2, No. 3 and No. 4.

[0078] wherein, the first load controller is connected with a type A load; the second load controller is connected with a class B load; the third load controller is connected with a class C load; and the fourth load controller is connected with a class D load.

[0079] Network communication is also performed wirelessly between the load controllers.

[0080] As shown in FIG. 3, each load controller includes a second data processing unit, a second electric signal collecting unit, and a second control switch unit; a second electric signal collecting unit and a second control switch unit respectively and two No. Data processing unit is connected.

[0081] The second control switch unit is composed of a fifth switch and a sixth switch. among them:

[0082] A switch No. 5 is configured to access power on the first fire line L1 and to supply power to the corresponding load.

[0083] The sixth switch is configured to access the electrical energy on the second live line L2 and to supply power to the corresponding load. [0084] The switch states of the fifth switch and the sixth switch are all controlled by the second data processing unit.

[0085] The second electrical signal acquisition unit is configured to collect data information of the load connected to the current load controller.

[0086] Taking the load controller No. 1 as an example, the load controller No. 1 is connected with a class A load.

[0087] When the Class A load is running, the No. 1 load controller can select the power from the No. 1 FireWire L1 or the No. 2 FireWire L2 according to the time period and the quality of the Class A load to the power demand, thereby realizing the new energy and the city. Flexible access to electricity.

[0088] For example, during the daytime, since the household electricity is not at a peak, at this time, as much household load as possible (the quality of the electric energy required) can be connected to the new energy, so as to fully utilize the new energy.

[0089] At the peak of the household power consumption at night, the load with certain power quality requirements can be connected to the utility power.

[0090] The No. 2 electric signal collecting unit can collect load data information of the Class A load during operation.

[0091] wherein the second electric signal collecting unit can be a voltage collecting unit or a current collecting unit, of course

It can also include a voltage acquisition unit and a current acquisition unit, as shown in Figure 3.

[0092] By collecting information about the voltage, current, and the like, the data collection of the Class A load operation data is realized.

[0093] Of course, a keyboard and a display unit are also connected to the second data processing unit. The user can input a running command or query information to the load controller through the keyboard and the display unit.

[0094] A carrier communication unit is further connected to the second data processing unit. After the data information is processed by the second data processing unit, on the one hand, it is used for switching control of the power supply, and on the other hand, the data communication information is transmitted to the other load controllers and the power controller through the carrier communication unit, so that each load controller selects one from one. Take power on L1 or FireWire L2.

[0095] Of course, a wireless communication unit, such as a Wifi unit or a Zigbee unit, is also connected to the second data processing unit. The data information is processed and sent wirelessly to the power controller and other individual load controllers.

[0096] In the embodiment of the present invention, the carrier communication unit and/or the wireless communication unit are used to facilitate different forms of networking between the power controller and each load controller, thereby facilitating the transmission of data information.

[0097] The above networking mode facilitates different types of loads according to requirements for power quality and time requirements. Flexible choice between new energy and utility power improves the flexibility and reliability of the home power supply system.

Based on this, the means for controlling the fifth switch and the sixth switch in the second data processing unit in the first embodiment of the present invention has three types of user setting, according to collected current, voltage data information or communication command.

Example 2

[0100] Embodiment 2 describes a home load access control method based on new energy and mains power supply, which is based on the home flexible power supply system based on new energy and mains power supply in the above-described Embodiment 1.

[0101] Specifically, the home load access control method based on the new energy and the mains power supply includes the following steps:

[0102] si. According to the self-characteristics of the load and the requirements of the power supply during the operation load, the household load is divided, and the household load is divided into four categories, namely, A, B, C, and D; ;

[0103] Class A load is a high demand for the power quality of the power source and a household load that is not frequently used;

[0104] Class B load is a household load that requires long-term operation;

[0105] Class C load is a household load of an electric water heater;

[0106] The class D load is a household load having a small load during standby but a large load at the time of operation.

[0107] There are four load controllers, which are defined as load controllers No. 1, No. 2, No. 3 and No. 4;

[0108] wherein, the load controller No. 1 is connected with a type A load; the second load controller is connected with a class B load; the third load controller is connected with a class C load; and the fourth load controller is connected with a class D load.

[0109] Each load controller performs network communication by carrier or wireless mode (hereinafter, wireless networking is taken as an example)

^' , .

[0110] s2. When various types of loads are put into operation, follow the steps below to select to access new energy or commercial power:

[0111] s2.1. Calculate the output power of the current new energy energy according to the load data information collected by the electric signal acquisition unit in each load controller, and record the output power of the current new energy energy SP

[0112] The maximum allowable output power defining the new energy energy is P _n-ax , the power SP _A defining the class A load, the power defining the class B load is P _B , the power defining the class C load is P _c , defining the class D The power of the load is P _D .

[0113] Wherein, the power of the class D load herein refers to the power of the class D load during operation (the standby power is negligible)

[0114] s2. 2. If the Class A load is to be put into operation, the No. 1 load controller first determines whether there is utility power access:

[0115] If there is utility power access, the utility power is preferentially accessed; [0116] If there is no utility power access, then judge? _+? Is it less than or equal to P _ _max:

[0117] If the condition is met, the No. 1 load controller connects the new energy energy into the Class A load power supply;

[0118] If the condition is not met, the information is transmitted to the No. 3 load controller and the No. 4 load controller through the wireless network, and the C and D loads that have been connected to the new energy are sequentially disconnected in order, until the condition is met. So far

[0119] At this time, the No. 1 load controller connects the new energy power into the Class A load power supply.

[0120] s2. 3. If the Class B load is to be put into operation, the No. 2 load controller first determines whether the new energy energy is normal:

[0121] If the new energy energy is not normal, the No. 2 load controller connects the Class B load to the utility power;

[0122] If the new energy is normal, then judge? Is _+P _B less than or equal to? :

[0123] If the condition is met, the No. 2 load controller connects the Class B load to the new energy source;

[0124] If the condition is not met, the information is transmitted to the No. 3 load controller and the No. 4 load controller through the wireless network, and the C and D loads that have been connected to the new energy are sequentially disconnected in sequence until the condition is met. So far, at this time, the No. 2 load controller connects the new energy power into the Class B load.

[0125] s2.4. If the Class C load is to be put into operation, the No. 3 load controller is first linked with the No. 4 load controller, and it is judged whether or not the Class D load is connected to the new energy source:

[0126] If there is a class D load and full SP _-P _D +P _c ^P _ _max , then the class C load is connected to the new energy power input operation when the class D load is in the standby state, when the class D load is at Disconnect the Class C load from the new energy source during operation;

[0127] If there is no Class D load in the new energy energy, the Bay judges whether _+P _c is less than or equal to P _n-ax:

[0128] If the condition is met, the load controller No. 3 connects the class C load to the new energy source;

[0129] If the condition is not met, the load controller No. 3 connects the Class C load to the utility power.

[0130] s2.5. If the Class D load is to be put into operation, the No. 4 load controller judges _+?. Whether it is less than or equal to P _n-ax

[0131] If the condition is met, the load controller No. 4 connects the class D load to the new energy source;

[0132] If the condition is not met, the load controller No. 4 connects the class D load to the mains power.

[0133] The method controls the household load by classification, and gives an optimized access control mode for different loads, so that the electric energy generated by the new energy in the home power grid is used as much as possible within the household range, and the method is reduced. Refueling power to the distribution network, reducing harmonics, voltage fluctuations, etc. in new energy Problems such as the decline in power quality of the distribution network.

The above description is only the preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and should be described by any person skilled in the art under the teaching of the present specification. All equivalent substitutes and obvious modifications are intended to be within the scope of the present invention and are intended to be protected by the present invention.

Claims

Claim

[Claim 1] A home flexible power supply system based on new energy and mains power supply, comprising: a power controller, a plurality of load controllers having the same structure, a first fire line, and a second fire line; :

The power controller comprises a data processing unit No. 1 , an electric signal acquisition unit No. 1 and a control switch unit No. 1; an electric signal acquisition unit No. 1 and a control switch unit No. 1 are respectively connected with the No. 1 data processing unit;

The first control switch unit is composed of a first switch, a second switch, a third switch, and a fourth switch;

Switch No. 1 is configured to connect the new energy to the No. 1 line of fire; Switch No. 2 is configured to connect the new energy to the No. 2 line; No. 3 switch, configured to use To connect the utility power to the No. 1 fire line;

Switch No. 4, configured to connect utility power to the No. 2 line of fire;

The switch states of the first switch, the second switch, the third switch, and the fourth switch are all controlled by the first data processing unit;

The No. 1 electric signal collecting unit is configured to collect load data information of the No. 1 FireWire and the No. 2 FireWire when the utility power or the new energy power is supplied;

A carrier communication unit and/or a wireless communication unit are further connected to the first data processing unit; the input ends of the respective load controllers are simultaneously connected to the first hot line and the second hot line; the output of each load controller is connected with a load ;

Each load controller includes a second data processing unit, a second electric signal acquisition unit, and a second control switch unit; the second electric signal acquisition unit and the second control switch unit are respectively connected to the second data processing unit;

The second control switch unit is composed of a fifth switch and a sixth switch;

Switch No. 5 is configured to connect the power on the No. 1 line and supply the corresponding load to the No. 6 switch, which is configured to connect the power on the No. 2 line and supply power to the corresponding load.

H The switch states of the fifth switch and the sixth switch are controlled by the second data processing unit;

The second electrical signal acquisition unit is configured to collect data information of a load connected to the current load controller;

A carrier communication unit and/or a wireless communication unit are also connected to the second data processing unit.

[Claim 2] The home flexible power supply system based on the new energy source and the mains power supply according to claim 1, wherein the first data processing unit is further connected with a keyboard and a display unit.

[Claim 3] A flexible home power supply system based on new energy and mains power supply according to claim 1, wherein a keyboard and a display unit are further connected to the second data processing unit.

[Claim 4] A home flexible power supply system based on new energy and mains power supply according to claim 1, wherein the electric signal acquisition unit No. 1 comprises a voltage collection unit and/or a current collection unit. .

[Claim 5] The home flexible power supply system based on new energy and mains power supply according to claim 1, wherein the second electric signal collecting unit comprises a voltage collecting unit and/or a current collecting unit .

[Claim 6] A home power supply system based on new energy and mains power supply according to claim 1, wherein each load controller is connected to a load of a type of load; wherein, each type of load is According to the characteristics of the load and the load of the power supply, the requirements of the power supply are divided.

[Claim 7] A home energy supply system based on a new energy source and a mains power supply according to any one of claims 1 to 6, wherein the new energy source energy comprises wind energy or solar energy.