Equipment power utilization monitoring and reactive power compensation device and equipment power utilization monitoring and reactive power compensation system
By installing reactive power measurement modules and filter capacitor compensation modules at home power circuit breakers, the problem of unbalanced reactive power of household appliances is solved, reactive compensation and power quality improvement are achieved, electricity bills and active losses are reduced, and the development of the power Internet of Things is supported.
Patent Information
- Application Number
- CN202422306305.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In the prior art, the reactive power of household appliances has not achieved in-site balance, which increases the reactive power transmission ratio and active loss in the line, resulting in an increase in electricity bills, and the inductive load generates harmonics, reducing the power quality.
Move the reactive power compensation measurement point to the household power circuit breaker, and realize the reactive power measurement and compensation of household power equipment through built-in reactive power measurement module and filter capacitor compensation module. Integrate the circuit breaker and reactive power measurement module to intensively utilize distribution components to reduce costs.
It realizes the whole house compensation for the reactive power of household appliances, reduces active losses, reduces electricity bills, improves power quality, and supports the construction of the Internet of Things.
Smart Images
Figure CN223166824U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric power, in particular to an equipment power consumption monitoring and reactive power compensation device and an equipment power consumption monitoring and reactive power compensation system. Background Art
[0002] Most household appliances are inductive loads, and inductive loads will inevitably generate reactive power when energized and operating. At present, centralized reactive power compensation is usually implemented on the low-voltage side of the community distribution room or the substation transformer. Although the overall power factor of the system is basically guaranteed, there are still two drawbacks. One is that reactive power is not balanced locally, increasing the proportion of reactive power transmission in the line (between the low-voltage side of the transformer and the main air switch of household electricity). The second is that the reactive power absorbed by household electricity from the power grid increases, resulting in an increase in active power loss, an increase in active power consumption, and then an increase in electricity bills. Content of the Utility Model
[0003] The purpose of the utility model is to provide an equipment power consumption monitoring and reactive power compensation device and an equipment power consumption monitoring and reactive power compensation system to alleviate the above technical problems existing in the prior art.
[0004] In a first aspect, the utility model provides an equipment power consumption monitoring and reactive power compensation device based on a household electricity breaker, including a new household electricity breaker and a filter capacitor compensation module; wherein, a reactive power measurement module is built in the new household electricity breaker, the working power supply of the reactive power measurement module is connected in parallel with the live wire and the neutral wire on the load side of the breaker, and the working current of the reactive power measurement module is obtained through a micro current transformer, and the micro current transformer is sleeved on the live wire on the load side of the breaker;
[0005] The reactive power measurement module is used to measure the total reactive power of household electrical equipment;
[0006] The reactive power measurement module includes a reactive power demand compensation instruction output terminal, and the reactive power demand compensation instruction output terminal is connected to the filter capacitor compensation module to issue corresponding compensation instructions to the filter capacitor compensation module according to the reactive power demand.
[0007] In an optional embodiment, the filter capacitor compensation module includes a plurality of micro filter capacitors with different capacities, a plurality of capacitor zero-crossing switching modules and an instruction receiving module.
[0008] In an optional embodiment, the new household electricity breaker is a single-phase breaker.
[0009] In an optional embodiment, the new household electricity breaker is a three-phase breaker.
[0010] In a second aspect, the present utility model provides a power consumption monitoring and reactive power compensation system for equipment, which includes a household smart meter, a new type of household circuit breaker, and a filter capacitor compensation module; wherein, the filter capacitor compensation module is provided with a 485 wiring terminal;
[0011] The household smart meter is used to transmit a 485 transmission signal to the filter capacitor compensation module;
[0012] The new type of household circuit breaker is internally provided with a reactive power measurement module. The working power supply of the reactive power measurement module is connected in parallel with the live wire and the neutral wire on the load side of the circuit breaker. The working current of the reactive power measurement module is obtained through a micro current transformer, and the micro current transformer is sleeved on the live wire on the load side of the circuit breaker; the new type of household circuit breaker is connected to the household smart meter, and the reactive power measurement module is used to measure the total reactive power of household electrical equipment;
[0013] The 485 wiring terminal is used to receive the 485 transmission signal sent by the household smart meter and read the power factor of household electricity measured in the household smart meter; the filter capacitor compensation module is used to perform capacitor compensation according to the reactive power demand.
[0014] In an optional embodiment, the household smart meter is a single-phase smart meter.
[0015] In an optional embodiment, the household smart meter is a three-phase smart meter.
[0016] In an optional embodiment, a micro filter capacitor is connected in parallel on the incoming line side of the meter.
[0017] In an optional embodiment, a micro filter capacitor is connected in parallel on the outgoing line side of the meter.
[0018] The power consumption monitoring and reactive power compensation device and the power consumption monitoring and reactive power compensation system provided by the present utility model move the reactive power compensation measurement point to the metering meter, which can realize the whole-house compensation of the reactive power of household appliances; and integrate the circuit breaker and the reactive power measurement module, intensively utilize the distribution components, and reduce the product cost; by reserving a 485 transmission signal receiving and instruction module, it is convenient to build a power Internet of Things, providing convenience for the implementation of interaction of the "source-network-energy storage-load" of the new power system. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0020] Figure 1 This is a schematic structural diagram of a device power consumption monitoring and reactive power compensation device based on a household circuit breaker provided by an embodiment of the present invention;
[0021] Figure 2 This is a schematic structural diagram of a connection structure of a filter capacitor compensation module provided by an embodiment of the present invention;
[0022] Figure 3 This is a schematic structural diagram of a device power consumption monitoring and reactive power compensation system provided by an embodiment of the present invention. Detailed implementation manners
[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.
[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.
[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.
[0027] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.
[0028] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0029] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.
[0030] With the rapid development of the economy and society, people's living standards have continued to improve, and the number, types and power of household appliances have also increased accordingly; and the main loads are inductive loads such as air conditioners, refrigerators, televisions, heating and cooling fans, ventilation fans, smart homes, LED lights, etc.; the above-mentioned inductive loads will inevitably generate reactive power when powered on; taking air conditioners as an example, although the design requires a power factor higher than 0.9, in daily use, due to changes in cooling and heating temperature requirements, its power factor hovers between 0.6-1.0; taking LEDs as an example, although the design requires a power factor higher than 0.9, when used in conjunction with thyristor dimming modules, the power factor often hovers between 0.54-0.7; taking refrigerators as an example, although the design requires a power factor higher than 0.9, when the compressor is running and the stored items change, the power factor often falls below 0.8.
[0031] At present, the power grid does not have rigid reactive power compensation requirements for the reactive power generated by household electricity consumption, and has not established a corresponding assessment mechanism. Instead, it adopts centralized reactive power compensation in the community distribution room or on the low-voltage side of the transformer of the substation. Although the overall power factor of the system is basically guaranteed, there are still three disadvantages. First, the reactive power is not balanced locally, which increases the proportion of reactive power transmission in the line (between the low-voltage side of the transformer and the main circuit breaker for household electricity consumption). Second, the reactive power absorbed by household electricity from the grid increases, resulting in increased active power loss and increased active power, which in turn increases electricity bills. For example, if the power factor is increased from 0.7 to 0.95, the active power loss reduction rate will increase from 46% to 51%. This is where there is room for household electricity consumption to save electricity and save electricity bills. Third, inductive loads generate harmonics, which reduce the quality of electricity.
[0032] Although the total power of a single household electrical appliance is small, the reactive power generated is also small, and the harmonics generated are also small. However, when the reactive powers of all households are superimposed, it is still a very large amount of reactive power, which has a non-negligible impact on the power quality and efficient operation of the power grid.
[0033] At present, there are power savers on the market. Their principle is also to use capacitive reactance to offset inductive reactance. The application method is to plug it into a socket of a certain household electrical appliance to intelligently meet the reactive power compensation of a single electrical appliance. This kind of "power saver" also has a disadvantage: when household electrical appliances are turned off at night, it still generates capacitive reactive power compensation and sends reactive power back to the power grid, which belongs to fixed compensation.
[0034] Embodiment 1
[0035] The present utility model provides a device power consumption monitoring and reactive power compensation device based on a household electrical circuit breaker. Refer to Figure 1 As shown, the device power consumption monitoring and reactive power compensation device based on a household electrical circuit breaker includes a new type of household electrical circuit breaker and a filter capacitor compensation module; wherein, a reactive power measurement module is built in the new type of household electrical circuit breaker. The working power supply of the reactive power measurement module is connected in parallel with the live wire and the neutral wire on the load side of the circuit breaker. The working current of the reactive power measurement module is obtained through a micro current transformer, and the micro current transformer is sleeved on the live wire on the load side of the circuit breaker; the reactive power measurement module is used to measure the total reactive power of household electrical equipment; the reactive power measurement module includes a reactive power demand compensation instruction output terminal, and the reactive power demand compensation instruction output terminal is connected to the filter capacitor compensation module to send corresponding compensation instructions to the filter capacitor compensation module according to the reactive power demand.
[0036] In an optional embodiment, the filter capacitor compensation module includes a plurality of micro filter capacitors with different capacities, a plurality of capacitor zero-crossing switching modules and an instruction receiving module. Among them, each micro filter capacitor is connected to a corresponding capacitor zero-crossing switching module, and the capacitor zero-crossing switching module is connected to the instruction receiving module. For the connection structure of the filter capacitor compensation module, refer to Figure 2 As shown. The reactive power demand compensation instruction output terminal is connected to the instruction receiving module of the filter capacitor compensation module. The filter capacitor compensation module is used to, when the capacitor over-switching module receives the compensation, send an instruction to put in or cut off the capacitor to the micro filter capacitor based on the compensation instruction, so as to control the corresponding connected micro filter capacitor to perform corresponding capacitor putting in or capacitor cutting off.
[0037] The capacities of the above-mentioned plurality of micro filter capacitors with different capacities can be set to 100 microfarads, 200 microfarads, 300 microfarads, 500 microfarads, etc. In actual application, the capacity size can be set according to the actual situation. Here is only an example and no specific limitation is made.
[0038] The above-mentioned zero-crossing switching module for capacitors is used to connect or disconnect the micro-filter capacitors. That is, when the reactive power measurement module detects reactive power, the corresponding filter capacitors are switched in, and when the reactive power measurement module does not detect reactive power, the corresponding filter capacitors are switched out.
[0039] The above-mentioned instruction receiving module is used to receive the capacitor compensation or switching instructions sent by the reactive power measurement module. This module is at the front stage of the "zero-crossing switching module for capacitors", and the processing sequence is to receive the instructions first and then decide whether to switch.
[0040] To enhance the diversity setting of the device power consumption monitoring device based on the household circuit breaker, in an alternative embodiment, the above-mentioned new household circuit breaker is a single-phase circuit breaker.
[0041] In another alternative embodiment, the above-mentioned new household circuit breaker can also be a three-phase circuit breaker.
[0042] The selection of the above-mentioned new household circuit breaker can be made between single-phase and three-phase according to actual needs.
[0043] Embodiment 2
[0044] The present utility model provides a device power consumption monitoring and reactive power compensation system, as shown in Figure 3 including a household smart meter, a new household circuit breaker, and a filter capacitor compensation module; wherein, the filter capacitor compensation module is provided with 485 wiring terminals;
[0045] The household smart meter is used to transmit 485 transmission signals to the filter capacitor compensation module;
[0046] The new household circuit breaker is internally provided with a reactive power measurement module. The working power supply of the reactive power measurement module is connected in parallel with the live wire and the neutral wire on the load side of the circuit breaker. The working current of the reactive power measurement module is obtained through a micro current transformer, and the micro current transformer is sleeved on the live wire on the load side of the circuit breaker; the new household circuit breaker is connected to the household smart meter, and the reactive power measurement module is used to measure the total reactive power of household electrical equipment;
[0047] The 485 wiring terminals are used to receive the 485 transmission signals sent by the household smart meter and read the power factor of household electricity measured in the household smart meter; the filter capacitor compensation module is used to perform capacitor compensation according to the reactive power demand.
[0048] The above 485 terminal is used to receive the 485 transmission signal sent by the household smart meter and read the household power factor measured in the household smart meter. The 485 transmission signal is used to transmit the power factor value of the meter. In one example, if the power factor transmitted by the smart meter is 0.38 at this time (that is, when it is less than 1), then after receiving the signal, the filter capacitor compensation module starts to input one or more groups of compensation; when the power factor transmitted by the meter is greater than 1, the filter capacitor compensation module cuts off one or more groups of capacitors after receiving the signal, aiming to always stabilize the household power factor at 1.
[0049] In one implementation, the above filter capacitor module further includes a "target power factor preset function", through which the power factor of the meter can be received. In one example, assuming that the power factor received from the meter is 0.8 and the preset target is 0.98, then the capacitor zero-crossing switching module can perform switching according to the target power factor.
[0050] Optionally, after the filter capacitor module receives the power factor of the meter, it can make its own judgment. If it is less than 1, it automatically inputs the capacitor; if it is greater than 1, it automatically cuts off the capacitor.
[0051] To enhance the diversity setting of the device power consumption monitoring and reactive power compensation device based on the household circuit breaker, in an optional implementation, the household smart meter is a single-phase smart meter or a three-phase smart meter. In actual applications, the device can be selected according to actual needs or cost requirements.
[0052] In one implementation, when measuring reactive power, the switch for measuring reactive power can be placed either inside or outside the meter. That is, in actual applications, the micro filter capacitor can be connected in parallel on the incoming line side of the meter or on the outgoing line side of the meter.
[0053] The above switch for measuring reactive power refers to the device power consumption monitoring and reactive power compensation device in this solution, and the meter is the smart meter. Before the meter (that is, outside the meter) means connecting this device in parallel on the incoming line of the meter, indicating that this device can be installed by the grid investment; after the meter (that is, inside the meter) means connecting this device in parallel on the outgoing line of the meter, indicating that this device is installed by the user investment; inside and outside the meter is the property boundary point.
[0054] In one embodiment, the above-mentioned filter capacitor compensation module further includes a 485 wiring terminal, which is used to receive the 485 transmission signal of the smart meter and read the household power factor measured in the smart meter. The filter capacitor compensation module can operate in two modes. When the power grid allows data sharing, it can operate in the power factor mode, and perform reactive power compensation according to the real-time power factor and target power factor. If the power grid data has not been shared in the short term, it can operate in the reactive power mode, and perform reactive power compensation through the reactive power demand compensation instruction output terminal in the reactive power measurement module.
[0055] The above-mentioned equipment power consumption monitoring and reactive power compensation system moves the reactive power compensation measurement point to the metering meter, which can realize the whole-house compensation of the reactive power of household appliances; and integrates the circuit breaker and the reactive power measurement module, intensively utilizes the distribution components, and reduces the product cost; by reserving the 485 transmission signal receiving and instruction module, it is convenient to build the power Internet of Things, and provides convenience for the implementation of the interaction of "source, grid, storage, and load" in the new power system.
[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. An equipment power consumption monitoring and reactive power compensation device based on a household electricity breaker, characterized in that, It includes a new type of household circuit breaker and a filter capacitor compensation module; among them, a reactive power measurement module is built in the new type of household circuit breaker, the working power supply of the reactive power measurement module is connected in parallel with the live wire and the neutral wire on the load side of the circuit breaker, the working current of the reactive power measurement module is obtained through a micro current transformer, and the micro current transformer is sleeved on the live wire on the load side of the new type of household circuit breaker; The reactive power measurement module is used to measure the total reactive power of household electrical equipment; The reactive power measurement module includes a reactive power demand compensation instruction output terminal, and the reactive power demand compensation instruction output terminal is connected to the filter capacitor compensation module to send corresponding compensation instructions to the filter capacitor compensation module according to the reactive power demand; The filter capacitor compensation module includes a plurality of micro filter capacitors with different capacities, a plurality of capacitor zero-crossing switching modules and an instruction receiving module. Each micro filter capacitor is connected to a corresponding capacitor zero-crossing switching module, the capacitor zero-crossing switching module is connected to the instruction receiving module, and the reactive power demand compensation instruction output terminal is connected to the instruction receiving module of the filter capacitor compensation module; the filter capacitor compensation module is used to, when the capacitor overswitching module receives the compensation, based on the compensation instruction, send an instruction to the micro filter capacitor to put in or cut off the capacitor, so as to control the corresponding connected micro filter capacitor to perform corresponding capacitor putting in or capacitor cutting off.
2. The equipment power consumption monitoring and reactive power compensation device based on a household electricity circuit breaker according to claim 1, wherein The new type of household circuit breaker is a single-phase circuit breaker.
3. The equipment power consumption monitoring and reactive power compensation device based on a household electricity circuit breaker according to claim 1, characterized in that, The new type of household circuit breaker is a three-phase circuit breaker.
4. A power consumption monitoring and reactive power compensation system for equipment, characterized in that, It includes a household smart meter, a new type of household circuit breaker and a filter capacitor compensation module; among them, the filter capacitor compensation module is provided with 485 wiring terminals; The household smart meter is used to transmit 485 transmission signals to the filter capacitor compensation module; A reactive power measurement module is built in the new type of household circuit breaker, the working power supply of the reactive power measurement module is connected in parallel with the live wire and the neutral wire on the load side of the circuit breaker, the working current of the reactive power measurement module is obtained through a micro current transformer, and the micro current transformer is sleeved on the live wire on the load side of the circuit breaker; the new type of household circuit breaker is connected to the household smart meter, and the reactive power measurement module is used to measure the total reactive power of household electrical equipment; The 485 wiring terminal is used to receive the 485 transmission signal sent by the household smart meter and read the power factor of household electricity measured in the household smart meter; the filter capacitor compensation module is used to perform capacitor compensation according to the reactive power demand.
5. The device power consumption monitoring and reactive power compensation system according to claim 4, characterized in that, The household smart meter is a single-phase smart meter.
6. The device power consumption monitoring and reactive power compensation system according to claim 4, characterized in that The household smart meter is a three-phase smart meter.
7. The device power consumption monitoring and reactive power compensation system according to claim 4, characterized in that, The micro filter capacitor is connected in parallel on the incoming line side of the meter.
8. The device power consumption monitoring and reactive power compensation system according to claim 4, characterized in that, The micro filter capacitor is connected in parallel on the outgoing line side of the meter.