Electrical safety monitoring system

Abstract

The invention discloses an electrical safety monitoring system, which comprises a main monitoring module, a plurality of sub monitoring modules and a human-computer interface, the main monitoring module and the sub monitoring modules have no physical connection relation and signal relevance, and the main monitoring module and the sub monitoring modules are communicated through a wireless network. Voltage signals monitored by the total monitoring module and the sub-modules are completely the same, current signals monitored by the total monitoring module and the sub-monitoring modules are different, and the mathematical sum of the current signals monitored by all the sub-monitoring modules is smaller than or equal to the current signals monitored by the total monitoring module. The sub-monitoring modules automatically execute circuit protection measures corresponding to potential safety hazards such as electric leakage, electric arc and short circuit, corresponding power supply line loads are cut off in a targeted mode, power supply of the whole line is not cut off, the pertinence is high, the user acceptability is high, the user experience can be effectively improved, and meanwhile under the condition that a power supply system is overloaded, the safety of the power supply system is improved. And cutting off power supply of a power supply line corresponding to the sub-monitoring module to stop overload of the power supply system, thereby further ensuring power utilization safety of the user.

Description

Technical Field

[0001] The present application relates to the technical field of power supply, and in particular to an electricity safety monitoring system. Background Art

[0002] With the diversification of residents' lives and travel, the number of household and office appliances is increasing, which also brings safety hazards to electricity use. Some may cause short circuits in wires and fires, endangering personal and property safety. Safety hazards include but are not limited to: circuit overload, line aging, line leakage, electric arc, and circuit short circuit when high-power electrical appliances are used at the same time.

[0003] Currently, there are monitoring systems embedded in air switches on the market, which can be used to control the air switches for air switch protection when safety hazards occur. However, the air switch protection generally controls the entire power supply system. For example, when a vicious load in the living room or a safety threat is detected, the entire power supply system will be controlled to trip, causing the power supply of the entire power supply system to be affected, affecting other normal electricity users and lines. Summary of the invention

[0004] The following is an overview of the topics described in detail in this article.

[0005] The embodiment of the present application provides an electricity safety monitoring system, which can at least ensure that the present application scheme, through a system structure of a general monitoring module, multiple sub-monitoring modules and a human-machine interface, can take circuit protection measures corresponding to safety hazards such as leakage, arc, short circuit, etc. for the power supply line through the sub-monitoring modules, so that when such hazards occur, there is no need to cut off the power supply of the entire power supply system or the entire power supply line, thereby avoiding affecting the normal power consumption of other residents or other power supply lines. At the same time, the general monitoring module is responsible for cutting off the power supply to the power supply line corresponding to the sub-monitoring module when the power supply system is overloaded, thereby improving the user experience while fully ensuring user safety.

[0006] An embodiment of the present invention provides an electricity safety monitoring system, which is applied to a power supply system. The electricity safety monitoring system includes: a general monitoring module, multiple sub-monitoring modules and a human-machine interface. All monitoring modules sample the voltage and current flowing through the module, and calculate the active power and reactive power flowing through the monitoring module based on the sampled voltage and current. The general monitoring module communicates with the sub-monitoring modules through a wireless network, and the sub-monitoring modules upload information such as their active power and reactive power to the general monitoring module through a wireless local area network. The general monitoring module is arranged at the main power switch of the power supply system, and the sub-monitoring modules are arranged inside the power supply line of the power supply system.

[0007] The sub-monitoring module is used to perform circuit protection measures on the power supply line, and the main monitoring module is used to cut off the power supply of the power supply line corresponding to the sub-monitoring module when the power supply system is overloaded, so as to stop the overload of the power supply system;

[0008] The human-machine interface is connected to the general monitoring module via a network and is used for users to set key loads and display load conditions.

[0009] According to the power safety monitoring system of the embodiment of the present invention, at least the following beneficial effects are achieved: the power safety monitoring system of the present application comprises: a general monitoring module, a plurality of sub-monitoring modules and a human-machine interface, the general monitoring module is arranged at the main power switch of the power supply system, the sub-monitoring module is arranged inside the power supply line of the power supply system, the general monitoring module and the sub-monitoring module have no physical connection relationship, but have signal correlation, and the general monitoring module and the sub-monitoring module communicate through a wireless network. The voltage signals monitored by the general monitoring module and the sub-module are exactly the same, the current signals monitored by the general monitoring module and the sub-monitoring module are different, and the mathematical sum of the current signals monitored by all the sub-monitoring modules is less than or equal to the current signal monitored by the general monitoring module. The sub-monitoring module automatically executes circuit protection measures corresponding to safety hazards such as leakage, arc, and short circuit, and specifically cuts off the corresponding power supply line load instead of cutting off the power supply of the entire line, which has high user acceptance. At the same time, when the power supply system is overloaded, the power supply of the corresponding power supply line of the sub-monitoring module is cut off to further ensure user safety.

[0010] In some embodiments, the sub-monitoring module is used to perform circuit protection measures on the power supply line according to power consumption information of the power supply line, and send the power consumption information to the main monitoring module.

[0011] In some embodiments, the main monitoring module is used to obtain power usage information corresponding to multiple sub-monitoring modules, and determine the target power supply line from the power supply lines corresponding to multiple sub-monitoring modules based on the power usage information, and control the sub-monitoring modules to cut off power supply to the target power supply line.

[0012] In some embodiments, the electricity usage information includes load information corresponding to the current power supply line.

[0013] In some embodiments, the circuit protection measures include leakage protection, arc protection and short circuit protection.

[0014] In some embodiments, the general monitoring module is used to identify malicious loads from the load information, and determine the power supply line corresponding to the malicious load as the target power supply line. Malicious loads are prone to cause fires, mainly referring to purely resistive direct heating appliances (electric soldering irons, water boiling rods, electric stoves, electric frying pans, hair dryers, hairpins, etc.). The power characteristics of malicious loads are resistive. The identification of malicious loads is determined according to the following two rules: 1. Load active power P>P X , P X According to the user's power supply system settings, P X Less than the total capacity of the power supply system; 2. The load power factor φ>0.95, that is, the load reactive power is small and the load is resistive.

[0015] In some embodiments, the general monitoring module is used to distinguish the load information into critical loads and non-critical loads according to a preset load identification table. Critical loads are loads that need to maintain power supply for as long as possible. Critical loads are set according to actual conditions, such as computers, etc. Computer identification is determined according to the following rules: 1. Load apparent power S Y , S Y Selected according to the user's computer type, S Y etc. Computer adapter rated power; 2.|(load real-time apparent power - average apparent power) / average apparent power|>30%, that is, the power fluctuation is relatively large; 3. The load harmonic distortion rate is >30%, and the load harmonic content is relatively large.

[0016] In some embodiments, the key load can also be set by the user through the human-machine interface, and the set characteristic values ​​include load power, power peak factor, power factor, current harmonic content, current 3rd, 5th, 7th, 9th, 11th, 13th harmonic content, current crest factor, transient waveform characteristics during start-stop process, etc. The overall monitoring module can identify the key load according to the characteristic values ​​set by the user.

[0017] In some embodiments, the overall monitoring module is used to control the sub-monitoring modules corresponding to the non-critical loads to cut off the power supply of the corresponding power supply lines when the power supply system is overloaded. The power supply system overload is determined according to the following two rules: 1. The active power monitored by the total monitoring module P>P N , P N Equal to the total capacity of the power supply system; 2. The active power monitored by the total monitoring module P>P N , lasting longer than 1 minute.

[0018] ​In some embodiments, the overall monitoring module is used to control the sub-monitoring modules corresponding to the critical loads to ensure power supply to the corresponding power supply lines when the power supply system is overloaded.

[0019] In some embodiments, the overall monitoring module is used to upload the load information to a database, and according to the priorities corresponding to the load information according to a preset load priority list (critical load priority > non-critical load > vicious load), determine the power supply line corresponding to the load information with the lowest priority as the target power supply line.

[0020] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a module diagram of a power safety monitoring system provided by an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of a monitoring module provided in another embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the characteristics, operations or features described in the specification can be combined in any appropriate manner to form various implementation methods. At the same time, the steps or actions in the method description can also be replaced or adjusted in order in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the accompanying drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a necessary sequence, unless otherwise specified that a certain sequence must be followed.

[0024] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] In the relevant technologies, with the diversification of residents' lives and travel, the number of household appliances is increasing, which also brings safety hazards to household electricity use. Some may cause short circuits and fires in wires, endangering personal and property safety. The safety hazards include but are not limited to: circuit overload, line aging, line leakage, electric arc, and circuit short circuit when high-power electrical appliances are used at the same time; currently, there are monitoring systems embedded in air switches on the market, which control the air switches to perform air switch protection when safety hazards occur, but the air switch protection generally controls an entire line. For example, if a malicious load in the living room or a safety threat is detected, the power supply system or the entire line will be controlled to trip, which will cause the power supply of the power supply system or the entire line to be affected, and affect other normal electricity users and lines, and residents have low acceptance.

[0028] In order to at least solve the problems existing in the above-mentioned technologies, the present application proposes an electricity safety monitoring system, which can at least ensure that the present application scheme adopts a system structure of a general monitoring module, multiple sub-monitoring modules and a human-machine interface, and through the sub-monitoring modules, targeted circuit protection measures corresponding to safety hazards such as leakage, arc, short circuit, etc. are taken for the power supply lines, so that when such hazards occur, there is no need to cut off the power supply of the entire power supply system or the entire power supply line, thereby avoiding affecting the normal power consumption of other residents or other power supply lines. At the same time, the general monitoring module is responsible for cutting off the power supply to the power supply line corresponding to the sub-monitoring module when the power supply system is overloaded, thereby improving the user experience while fully ensuring user safety.

[0029] The present application is described in detail below with reference to the accompanying drawings.

[0030] refer to Figure 1 , Figure 1It is a module diagram of the electricity safety monitoring system provided by an embodiment of the present invention. The present application proposes an electricity safety monitoring system, which is applied to the power supply system. The electricity safety monitoring system includes: a general monitoring module, multiple sub-monitoring modules and a human-machine interface. The human-machine interface communicates with the general monitoring module through a network, and the general monitoring module communicates with the sub-monitoring modules through a wireless network. The general monitoring module is arranged at the main power supply switch of the power supply system, and the sub-monitoring module is arranged inside the power supply line of the power supply system. The sub-monitoring module is used to perform circuit protection measures on the power supply line. The general monitoring module is used to cut off the power supply of the power supply line corresponding to the sub-monitoring module when the power supply system is overloaded, so as to stop the power supply system from overloading.

[0031] It is worth noting that identifying the load on the power supply line and performing circuit safety protection on the power supply line are both existing technologies. What this application wants to protect is this power safety monitoring system structure of a general monitoring module and multiple sub-monitoring modules, wherein the sub-monitoring modules are used to control the safety hazards of line aging, leakage, arcing, short circuit, etc., which do not require cutting off the entire power supply line, and a single sub-monitoring module corresponds to a single power supply line. The sub-monitoring module only regulates the output power at the power supply line through relevant protection circuits and structures to resolve safety hazards, thereby avoiding the situation in the prior art where, when the above-mentioned security threats are detected, the entire power supply system will be controlled to trip or the entire power line will be cut off, seriously affecting the use of other normal power lines or power supply lines, thereby improving the user's power experience.

[0032] At the same time, when the total load of the power supply system is overloaded, since each sub-monitoring module is only responsible for the corresponding power supply line, the main monitoring module that obtains the power consumption (load information) of each sub-monitoring module through the wireless network controls the power supply line with load to cut off power supply to ensure the safety of the power supply system.

[0033] It is worth noting that the main monitoring module can directly control the main power supply switch to disconnect the entire line corresponding to the switch, and then cut off the power supply of the power supply line corresponding to the sub-monitoring module, so that the power supply system exits the overload state to ensure the safety of the power supply system. The sub-monitoring module can also be controlled to cut off the power supply of the corresponding power supply line. In this application, the main monitoring module sorts the power consumption (load information) sent by the sub-monitoring module according to the load information sorting rules (critical load priority > non-critical load > vicious load), and cuts off the power supply of the power supply line corresponding to the sub-monitoring module in turn according to the sorting until the power supply system exits the overload state.

[0034] In some embodiments, the sub-monitoring module is used to perform circuit protection measures on the power supply line according to the power consumption information of the power supply line, and send the power consumption information to the main monitoring module.

[0035] In some embodiments, the overall monitoring module is used to obtain power usage information corresponding to multiple sub-monitoring modules, and determine a target power supply line from the power supply lines corresponding to the multiple sub-monitoring modules based on the power usage information, and control the sub-monitoring modules to cut off power supply to the target power supply line.

[0036] In some embodiments, the electricity usage information includes load information corresponding to the current power supply line.

[0037] In some embodiments, circuit protection measures include leakage protection, arc protection and short circuit protection. It can be imagined that common circuit protection structures or control logic such as leakage protection, arc protection and short circuit protection are well known to technical personnel in this field. This type of safety protection measures that do not involve circuit overload and do not involve load identification of the power supply system are executed by the sub-monitoring module itself to avoid affecting the power supply of the entire line, thereby improving the residents' acceptance and allowing the main monitoring module to only perform the operation of cutting off power supply when overloaded. The main monitoring module and multiple sub-monitoring modules have a reasonable division of labor to simply and effectively ensure user safety and usage experience.

[0038] In some embodiments, the overall monitoring module is used to identify malicious loads from load information and determine the power supply line corresponding to the malicious load as the target power supply line. It can be imagined that a malicious load is a malicious load, and a malicious load represents a load with a step power greater than a pre-set load. The sub-monitoring module corresponding to the malicious load is determined through the load identification algorithm in the prior art, so that when the sub-monitoring module receives the relevant control signal sent by the overall monitoring module, the power supply of the power supply line is cut off to ensure the safety of the power supply system.

[0039] At the same time, it is worth noting that there are methods in the prior art for identifying loads through a single monitoring module, and many load distinctions are listed, but the superposition of loads is not considered. For example, two computer loads may be the same as an electric bicycle charging load, and the current waveforms are basically the same. In this way, the recognition accuracy will be greatly reduced. Under the structure of the present application, a single power supply line has a corresponding sub-monitoring module, and the sub-monitoring module can be implanted with an existing recognition algorithm, which can greatly reduce the problem of reducing the recognition accuracy after the superposition of multiple loads, and effectively improve the accuracy of the recognition algorithm applied in the present application.

[0040] In some embodiments, the overall monitoring module is used to distinguish load information into critical loads and non-critical loads according to a preset load identification table. When the power supply system is overloaded, the overall monitoring module is used to control the sub-monitoring modules corresponding to the non-critical loads to cut off the power supply of the corresponding power supply lines. When the power supply system is overloaded, the overall monitoring module is used to control the sub-monitoring modules corresponding to the critical loads to ensure the power supply of the corresponding power supply lines. It can be imagined that the identification of critical loads and non-critical loads are also existing technologies, and technical personnel in related fields can make settings according to specific application scenarios.

[0041] In some embodiments, the overall monitoring module is used to upload the load information to a database, and determine the power supply line corresponding to the load information with the lowest priority as the target power supply line according to the priority corresponding to the load information in a preset load priority list.

[0042] It is conceivable that, in some embodiments, the sub-monitoring module sends information to the main monitoring module, the main monitoring module identifies relatively fixed loads outside the power supply line, comprehensively records the information of each load, sorts the importance of each online load, and uploads the data to the database. When overloaded, instructions are sent to the sub-modules to cut off the loads with the lowest importance in turn. The database can be set up by technical personnel in related fields according to specific application scenarios.

[0043] It should be noted that the load classification described above can be set by the user or by default. According to the set load type, the load characteristics are extracted, and the characteristic values ​​include load power, power peak factor, power factor, current harmonic content, current 3rd, 5th, 7th, 9th, 11th, and 13th harmonic content, current peak factor, transient waveform characteristics during start-stop process, etc.

[0044] refer to Figure 2 , Figure 2 It is a schematic diagram of the structure of a total monitoring module and a sub-monitoring module of an electricity safety monitoring system in an embodiment of the present invention. The device includes: a relay normally open contact 101, a relay control coil 102, a sampling resistor 103, a voltage conditioning circuit 104, a current conditioning circuit 105, a microprocessor 106 and a wireless communication module 107.

[0045] In some embodiments, the structural schematics of the main monitoring module and the sub-monitoring module are the same, but the component parameters may be different. For example, the rated power of the normally open contact 101 of the relay is different and needs to be selected according to actual conditions; depending on the actual current size, the sampling resistor and the conditioning circuit may also be different.

[0046] In some embodiments, the relay normally open contact 101 and the relay control coil 102 can be replaced with other actuators that can disconnect the circuit, such as a solid-state switch.

[0047] In some embodiments, the monitoring module can be encapsulated in a socket or a circuit breaker to form a power supply entity with the socket or the circuit breaker.

[0048] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network nodes. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0049] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present application. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A power safety monitoring system, applied to a power supply system, characterized in that: The electricity safety monitoring system comprises: a general monitoring module, a plurality of sub-monitoring modules and a human-machine interface, the general monitoring module and the sub-monitoring modules communicate with each other through a wireless network, the general monitoring module is arranged at the main power switch of the power supply system, the sub-monitoring modules are arranged inside the power supply line of the power supply system, the general monitoring module and the sub-monitoring modules have no physical connection relationship, but have signal correlation, the voltage signals monitored by the general monitoring module and the sub-modules are exactly the same, the current signals monitored by the general monitoring module and the sub-monitoring modules are different, and the mathematical sum of the current signals monitored by all the sub-monitoring modules is less than or equal to the current signal monitored by the general monitoring module; The sub-monitoring module is used to perform circuit protection measures on the power supply line, and the main monitoring module is used to cut off the power supply of the power supply line corresponding to the sub-monitoring module when the power supply system is overloaded, so as to stop the overload of the power supply system.

2. The power safety monitoring system according to claim 1, characterized in that: The sub-monitoring module is used to perform circuit protection measures on the power supply line according to the power consumption information of the power supply line, and send the power consumption information to the main monitoring module.

3. The power safety monitoring system according to claim 2, characterized in that: The overall monitoring module is used to obtain power usage information corresponding to the plurality of sub-monitoring modules, and determine a target power supply line from the power supply lines corresponding to the plurality of sub-monitoring modules according to the power usage information, and control the sub-monitoring modules to cut off power supply of the target power supply line.

4. The power safety monitoring system according to claim 3, characterized in that: The power usage information includes load information corresponding to the current power supply line.

5. The power safety monitoring system according to claim 4, characterized in that: The overall monitoring module is used to identify a malicious load from the load information, and determine the power supply line corresponding to the malicious load as the target power supply line.

6. The power safety monitoring system according to claim 4, characterized in that: The general monitoring module is used to classify the load information into critical load, non-critical load, and malignant load according to a preset load identification table, and determine the priority level as critical load>non-critical load>malignant load.

7. The power safety monitoring system according to claim 6, characterized in that: The main monitoring module is used to control the sub-monitoring modules corresponding to the low priority levels to cut off the power supply of the corresponding power supply lines according to the priority levels when the power supply system is overloaded, until the main monitoring module is not overloaded, thereby ensuring that the power supply to critical loads is not affected.

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