Intelligent building management system and method based on pulse current

Abstract

The present invention relates to a pulse current-based intelligent building management system and method. Its communication center controller controls meter box monitoring devices to transmit meter box pulse voltage carrier signals one by one, and controls distribution box monitoring devices to transmit distribution box pulse current carrier signals one by one, so as to determine the branch-level topology based on the characteristic information of the meter box pulse voltage carrier signals transmitted by each meter box monitoring device and the distribution box pulse current carrier signals transmitted by each distribution box monitoring device. After determining the branch-level topology, the communication center controller controls adapters to transmit corresponding adapter pulse voltage carrier signals one by one, and determines the meter box-level topology formed by the corresponding connection between the adapter and the corresponding meter box monitoring device based on the adapter pulse voltage carrier signals transmitted by each adapter. The present invention effectively identifies and maintains the DC power distribution topology of a building, improving the intelligent monitoring and reliability of electrical equipment during use.

Description

Technical Field

[0001] The present invention relates to a building management system and method, in particular to an intelligent building management system and method based on pulse current. Background Art

[0002] Currently, integrated building management systems (BMSs) offer limited functionality, typically only monitoring the entire building's power usage from the distribution room or central control room. They are unable to analyze and identify the topological relationships of individual loads across the entire power supply. Automated monitoring of electrical equipment within individual users and rooms is lacking. When equipment experiences overload, short circuits, or open circuits, manual on-site inspection and repair are required, with no immediate monitoring measures. The lack of effective information-based management and control makes it difficult to maintain the topological relationships of individual users' equipment, leading to a significant problem of disorganization.

[0003] In high-end new building designs, most have deployed intelligent integrated monitoring systems. However, due to the influence of various equipment factors, the safety level is low, fault location is inaccurate, and alarm response is not timely enough, which cannot meet today's building safety needs. Transformers and circuit breakers or branch lines are heavily overloaded and lightly unloaded at the same time, and the line load is unbalanced. In severe cases, equipment and lines may burn out, endangering national property and personal safety. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an intelligent building management system and method based on pulse current, which can effectively identify and maintain the DC power distribution topology of a building and improve the intelligence and reliability of monitoring of electrical equipment during use.

[0005] According to the technical solution provided by the present invention, the pulse current-based intelligent building management system includes a communication center controller, a plurality of distribution box monitoring devices for monitoring the power supply status of the distribution box, a plurality of meter box monitoring devices for monitoring the power supply status of the meter box, and a plurality of adapters for monitoring the power consumption status of the electrical equipment, wherein the distribution box monitoring device corresponds one-to-one with the monitored distribution box, and the meter box monitoring device corresponds one-to-one with the monitored meter box, and the communication center controller, the distribution box monitoring device, the meter box monitoring device, and the adapter communicate based on the HPLC network;

[0006] The communication center controller controls the meter box monitoring devices to transmit meter box pulse voltage carrier signals one by one and controls the distribution box monitoring devices to transmit distribution box pulse current carrier signals one by one, so as to determine the branch-level topology formed by the corresponding connections between the communication center controller and all distribution box monitoring devices and all meter box monitoring devices based on the characteristic information of the meter box pulse voltage carrier signals transmitted by each meter box monitoring device and the distribution box pulse current carrier signals transmitted by each distribution box monitoring device;

[0007] After determining the branch-level topology, the communication center controller controls the adapters to transmit corresponding adapter pulse voltage carrier signals one by one, and determines the meter box-level topology formed by the corresponding connection between the adapter and the corresponding meter box monitoring device according to the adapter pulse voltage carrier signal transmitted by each adapter.

[0008] The distribution box monitoring device includes a distribution monitoring circuit breaker device and / or a distribution monitoring detection switch device with HPLC communication capability;

[0009] The meter box monitoring device includes a meter box detection switch device with HPLC communication capability.

[0010] For any distribution box monitoring device, the transmitted distribution box pulse current carrier signal is:

[0011]

[0012] Among them, I t is the pulse current carrier signal, V is the effective value of the mains voltage, f0 is the mains frequency, σ1 is the distribution box monitoring device transmitting the pulse current carrier signal I at frequency f1 t When t is the duty cycle of the corresponding waveform, R is the equivalent load value of the distribution box monitoring device when transmitting the pulse current carrier signal; t is the moment when the current distribution box monitoring device transmits the distribution box pulse current carrier signal.

[0013] When determining the branch-level topology, the communication center controller includes sequentially identifying the branch end-level connection topology and the branch main-level connection topology, wherein the topological connection position status between the meter box monitoring device and the corresponding distribution box monitoring device is determined through the branch end-level connection topology, and the corresponding topological connection position status between the distribution box monitoring devices and between the distribution box monitoring device and the communication center controller is determined through the branch main-level connection topology.

[0014] During the branch final connection topology identification, after any meter box monitoring device generates a meter box pulse voltage carrier signal, the generated meter box pulse voltage carrier signal and the meter box voltage carrier emission time-frequency characteristics of the meter box pulse voltage carrier signal are simultaneously fed into the HPLC network;

[0015] The distribution box monitoring device, which is adapted to be connected to the meter box monitoring device currently generating the meter box pulse voltage carrier signal, receives the meter box pulse voltage carrier signal and the voltage carrier transmission time-frequency characteristics of the meter box pulse voltage carrier signal via the HPLC network, and after receiving the meter box pulse voltage carrier signal, obtains the meter box voltage carrier reception time-frequency characteristics of the meter box pulse voltage carrier signal using Hilbert-Huang extraction, and simultaneously sends the extracted meter box voltage carrier reception time-frequency characteristics and the received meter box voltage carrier transmission time-frequency characteristics to the communication center controller;

[0016] The communication center controller compares the meter box voltage carrier transmission time-frequency characteristics and the meter box voltage carrier reception time-frequency characteristics. When the meter box voltage carrier transmission time-frequency characteristics match the meter box voltage carrier reception time-frequency characteristics, the communication center controller determines the meter box monitoring topology ID of the meter box monitoring device currently transmitting the meter box pulse voltage carrier signal and the corresponding meter box topology connection position status.

[0017] By determining the meter box monitoring topology IDs and meter box topology connection position states of all meter box monitoring devices, the communication center controller determines the branch final level connection topology formed by the corresponding connections between the meter box monitoring devices and the distribution box monitoring devices.

[0018] During the branch main level connection topology identification, after any distribution box monitoring device generates a distribution box pulse current carrier signal, the generated distribution box pulse current carrier signal and the distribution box current carrier emission time-frequency characteristics of the distribution box pulse current carrier signal are simultaneously fed into the HPLC network;

[0019] The communication center controller or the distribution box monitoring device that is adaptively connected to the distribution box monitoring device that currently generates the distribution box current carrier signal receives the distribution box pulse current carrier signal and the distribution box pulse current carrier transmission time-frequency characteristics through the HPLC network, and after receiving, uses the Hilbert-Huang transform to extract the distribution box current carrier reception time-frequency characteristics of the received distribution box pulse current carrier signal;

[0020] The communication center controller compares the time-frequency characteristics of the distribution box current carrier transmission and the time-frequency characteristics of the distribution box current carrier reception. When the time-frequency characteristics of the distribution box current carrier transmission match the time-frequency characteristics of the distribution box current carrier reception, the distribution monitoring topology ID of the distribution box monitoring device currently transmitting the distribution box pulse current carrier signal and the corresponding distribution box topology connection position status are determined;

[0021] By determining the distribution monitoring topology IDs of all distribution box monitoring devices and the distribution box connection position states, the communication center controller determines the branch main-level connection topology formed by the corresponding connections of all distribution box monitoring devices.

[0022] After determining the meter box level topology, a meter box monitoring device also transmits a topology verification voltage. After transmitting the topology verification voltage, the meter box level topology connection position status of the meter box monitoring device that transmits the topology verification voltage is verified and confirmed based on Kirchhoff's current law.

[0023] For any meter box monitoring device, the transmitted meter box pulse voltage carrier signal is:

[0024] V t =A·cos(2πf0t)·(0.5σ2+0.5)

[0025] Among them, V t is the pulse voltage carrier signal, A is the signal amplitude, σ2 is the duty cycle of the corresponding waveform when the distribution box monitoring device transmits the meter box pulse voltage carrier signal at frequency f2, and t is the meter box pulse voltage carrier signal V t The launch time.

[0026] The power status parameters of the power-consuming device monitored by the adapter include voltage, current and / or power factor.

[0027] A pulse current-based intelligent building management method includes a communication center controller, several distribution box monitoring devices for monitoring the power supply status of distribution boxes, several meter box monitoring devices for monitoring the power supply status of meter boxes, and several adapters for monitoring the power consumption status of electrical equipment. The distribution box monitoring devices correspond one-to-one with the monitored distribution boxes, and the meter box monitoring devices correspond one-to-one with the monitored meter boxes. The communication center controller, the distribution box monitoring devices, the meter box monitoring devices, and the adapters communicate with each other based on an HPLC network.

[0028] The communication center controller controls the meter box monitoring devices to transmit meter box pulse voltage carrier signals one by one and controls the distribution box monitoring devices to transmit distribution box pulse current carrier signals one by one, so as to determine the branch-level topology formed by the corresponding connections between the communication center controller and all distribution box monitoring devices and all meter box monitoring devices based on the characteristic information of the meter box pulse voltage carrier signals transmitted by each meter box monitoring device and the distribution box pulse current carrier signals transmitted by each distribution box monitoring device;

[0029] After determining the branch-level topology, the communication center controller controls the adapters to transmit corresponding adapter pulse voltage carrier signals one by one, and determines the meter box-level topology formed by the corresponding connection between the adapter and the corresponding meter box monitoring device according to the adapter pulse voltage carrier signal transmitted by each adapter.

[0030] The advantages of the present invention are as follows: the communication center controller controls the meter box monitoring devices to transmit meter box pulse voltage carrier signals one by one and controls the distribution box monitoring devices to transmit distribution box pulse current carrier signals one by one, so as to determine the branch-level topology formed by the corresponding connections between the communication center controller and all distribution box monitoring devices and all meter box monitoring devices based on the characteristic information of the meter box pulse voltage carrier signals transmitted by each meter box monitoring device and the distribution box pulse current carrier signals transmitted by each distribution box monitoring device;

[0031] After determining the branch-level topology, the communication center controller controls the adapters to transmit corresponding adapter pulse voltage carrier signals one by one. The meter box-level topology formed by the corresponding connection between the adapter and the corresponding meter box monitoring device is determined based on the adapter pulse voltage carrier signal transmitted by each adapter. This can effectively identify and maintain the DC distribution topology of the building, and improve the intelligence and reliability of monitoring of electrical equipment during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the principle of the present invention.

[0033] Figure 2 This is a schematic diagram of the present invention using a meter box positioning device to perform meter box level topology identification.

[0034] Figure 3 A schematic diagram of an implementation of the present invention for identifying and determining a building power distribution topology.

[0035] Figure 4 This is a workflow diagram for identifying building power distribution topology according to the present invention. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to specific drawings and embodiments.

[0037] like Figure 1 As shown: In order to effectively identify and maintain the DC power distribution topology of a building and improve the intelligent and reliable monitoring of electrical equipment during use, the present invention includes a communication center controller, a plurality of distribution box monitoring devices for monitoring the power supply status of distribution boxes, a plurality of meter box monitoring devices for monitoring the power supply status of meter boxes, and a plurality of adapters for monitoring the power consumption status of electrical equipment. Among them, the distribution box monitoring devices correspond one-to-one with the monitored distribution boxes, and the meter box monitoring devices correspond one-to-one with the monitored meter boxes. The communication center controller, the distribution box monitoring devices, the meter box monitoring devices, and the adapters communicate based on an HPLC network.

[0038] The communication center controller controls the meter box monitoring devices to transmit meter box pulse voltage carrier signals one by one and controls the distribution box monitoring devices to transmit distribution box pulse current carrier signals one by one, so as to determine the branch-level topology formed by the corresponding connections between the communication center controller and all distribution box monitoring devices and all meter box monitoring devices based on the characteristic information of the meter box pulse voltage carrier signals transmitted by each meter box monitoring device and the distribution box pulse current carrier signals transmitted by each distribution box monitoring device;

[0039] After determining the branch-level topology, the communication center controller controls the adapters to transmit corresponding adapter pulse voltage carrier signals one by one, and determines the meter box-level topology formed by the corresponding connection between the adapter and the corresponding meter box monitoring device according to the adapter pulse voltage carrier signal transmitted by each adapter.

[0040] Specifically, the communication center controller can adopt the existing commonly used form. Generally, the communication center controller can be set on the outgoing line side of the building substation. The communication center controller has the ability of HPLC network communication. The specific form of the communication center controller can be selected according to needs, based on whether it can meet the management requirements of the communication center controller. It will not be repeated here.

[0041] When identifying the DC distribution topology, the communication center controller, distribution box monitoring device, meter box monitoring device and adapter are all located in the same area. The distribution box monitoring device can monitor the power supply status of the distribution box, the meter box monitoring device can monitor the power supply status of the meter box, and the adapter can monitor the power consumption parameters of the electrical equipment required to be monitored in the room.

[0042] In specific implementations, the distribution box monitoring device corresponds one-to-one with the distribution boxes within the building, meaning that one distribution box monitoring device is used to monitor the power supply status of one distribution box. This monitoring includes monitoring the power supply status of the distribution box or shutting off the power supply to the distribution box, and the specific options can be selected based on actual needs. The distribution box monitoring device can utilize a distribution monitoring circuit breaker device and / or a distribution monitoring detection switch device with HPLC (broadband power line carrier) communication capabilities. For example, the distribution monitoring circuit breaker can utilize an existing commonly used molded case circuit breaker, and the distribution monitoring detection switch device can utilize an existing commonly used intelligent detection switch. Generally, the molded case circuit breaker can be used to shut off the power supply to the distribution box.

[0043] The meter box monitoring device is used to monitor the power supply status of the meter boxes in a building. Of course, there is a one-to-one correspondence between the meter box monitoring device and the meter box in the building. The meter box specifically refers to the power supply box that enters the building. The meter box monitoring device also uses a meter box detection switch device with HPLC communication capabilities. Similarly, the adapter can use an existing form factor that can monitor electrical equipment and also needs to have HPLC communication capabilities.

[0044] The distribution box monitoring device, the meter box monitoring device, the adapter and the communication center controller all have HPLC communication capabilities, that is, they can form an HPLC network when working. After the HPLC network is formed, the communication center controller can control the distribution box monitoring device to transmit the distribution box pulse current carrier signal, and can control the meter box monitoring device to transmit the meter box pulse voltage carrier signal, and control the adapter to transmit the adapter buried layer voltage carrier signal. The distribution box monitoring device can adopt the commonly used technical means in this technical field to realize the transmission of the distribution box pulse current carrier signal; the meter box monitoring device and the adapter can adopt the commonly used technical means in this technical field to realize the transmission of the corresponding meter box pulse voltage carrier signal and adapter pulse voltage carrier signal. The specific method and process of transmitting the distribution box pulse current carrier signal, the meter box pulse voltage carrier signal and the adapter pulse voltage carrier signal can be selected according to actual needs, so as to meet the topology identification requirements.

[0045] In the embodiment of the present invention, the communication center controller first determines the branch-level topology, and after determining the branch-level topology, can identify the meter box-level topology. Figure 3 Figure 2 shows a schematic diagram of the entire building DC distribution topology after determining the branch-level topology and meter-box-level topology. COO is the communication center controller, PCO1, PCO2, and PCO3 are distribution box monitoring devices, and STA1 to STA9 are meter box monitoring devices or adapters.

[0046] Furthermore, when determining the branch-level topology, the communication center controller includes sequentially identifying the branch end-level connection topology and the branch main-level connection topology, wherein the topological connection position status between the meter box monitoring device and the corresponding distribution box monitoring device is determined through the branch end-level connection topology, and the corresponding topological connection position status between the distribution box monitoring devices and between the distribution box monitoring device and the communication center controller is determined through the branch main-level connection topology.

[0047] In an embodiment of the present invention, the branch-level topology generally includes a branch-level final-level connection topology and a branch-level main-level connection topology, wherein the topological connection position status between the meter box monitoring device and the corresponding distribution box monitoring device is determined by the branch final-level connection topology, and the corresponding topological connection position status between the distribution box monitoring devices and between the distribution box monitoring device and the communication center controller is determined by the branch main-level connection topology.

[0048] Furthermore, when identifying the branch final connection topology, after any meter box monitoring device generates a meter box pulse voltage carrier signal, the generated meter box pulse voltage carrier signal and the meter box voltage carrier transmission time-frequency characteristics of the meter box pulse voltage carrier signal are simultaneously fed into the HPLC network;

[0049] The distribution box monitoring device, which is adapted to be connected to the meter box monitoring device currently generating the meter box pulse voltage carrier signal, receives the meter box pulse voltage carrier signal and the voltage carrier transmission time-frequency characteristics of the meter box pulse voltage carrier signal via the HPLC network, and after receiving the meter box pulse voltage carrier signal, obtains the meter box voltage carrier reception time-frequency characteristics of the meter box pulse voltage carrier signal using Hilbert-Huang extraction, and simultaneously sends the extracted meter box voltage carrier reception time-frequency characteristics and the received meter box voltage carrier transmission time-frequency characteristics to the communication center controller;

[0050] The communication center controller compares the meter box voltage carrier transmission time-frequency characteristics and the meter box voltage carrier reception time-frequency characteristics. When the meter box voltage carrier transmission time-frequency characteristics match the meter box voltage carrier reception time-frequency characteristics, the communication center controller determines the meter box monitoring topology ID of the meter box monitoring device currently transmitting the meter box pulse voltage carrier signal and the corresponding meter box topology connection position status.

[0051] By determining the meter box monitoring topology IDs and meter box topology connection position states of all meter box monitoring devices, the communication center controller determines the branch final level connection topology formed by the corresponding connections between the meter box monitoring devices and the distribution box monitoring devices.

[0052] In specific implementation, for any meter box monitoring device, the meter box pulse voltage carrier signal emitted is:

[0053] V t =A·cos(2πf0t)·(0.5σ2+0.5)

[0054] Among them, V t is the meter box pulse voltage carrier signal, A is the signal amplitude, σ2 is the duty cycle of the corresponding waveform when the distribution box monitoring device transmits the meter box pulse voltage carrier signal at frequency f2, and t is the meter box pulse voltage carrier signal V t The launch time.

[0055] In embodiments of the present invention, the meter box monitoring device is typically installed in the smallest unit of a building, such as a meter box in a household or room. Its incoming line is connected to the main distribution box on the corresponding floor, and its outgoing line is connected to the incoming line of the room's circuit. The meter box monitoring device also needs to be capable of transmitting the meter box pulse voltage carrier signal. The specific method for transmitting the meter box pulse voltage carrier signal can be selected as needed, with the ability to achieve this transmission being the primary consideration.

[0056] As can be seen from the above description, the meter box pulse voltage carrier signal emitted by the meter box monitoring device is fed into the connected power line. Because each meter box monitoring device transmits the meter box pulse voltage carrier signal at a different time t, a corresponding meter box pulse voltage carrier signal can be obtained.

[0057] In practice, the meter box pulse voltage carrier signal, based on the load impedance distribution characteristics of the actual circuit, generates a pulse current signal with identical frequency domain characteristics, which flows to each electrical branch. Specifically, these electrical branches are nodes formed by the connected distribution box monitoring device. Therefore, although the meter box monitoring device generates a pulse current carrier signal, the distribution box monitoring device connected to it still receives a current signal.

[0058] In an embodiment of the present invention, after generating a meter box pulse voltage carrier signal, the meter box monitoring device may determine the meter box voltage carrier transmission time-frequency characteristics of the meter box pulse voltage carrier signal using methods such as DFT transformation. The specific method and process for determining the meter box voltage carrier transmission time-frequency characteristics can be selected as needed. Of course, in a specific implementation, the meter box monitoring device will simultaneously feed the meter box pulse voltage carrier signal and the meter box voltage carrier transmission time-frequency characteristics of the meter box pulse voltage carrier signal into the HPLC network.

[0059] Generally, meter-box-level monitoring devices are physically connected to corresponding distribution box monitoring devices. Therefore, the meter box pulse voltage carrier signal and the meter box voltage carrier transmission time-frequency characteristics of the meter box monitoring device are received by all distribution box monitoring devices within the same branch network. Upon reception, the distribution box monitoring device extracts the meter box voltage carrier reception time-frequency characteristics of the meter box pulse voltage carrier signal using Hilbert-Huang extraction. After extracting the meter box voltage carrier reception time-frequency characteristics, the distribution box monitoring device simultaneously transmits the extracted meter box voltage carrier reception time-frequency characteristics and the received meter box voltage carrier transmission time-frequency characteristics to the communication center controller for comparison.

[0060] In the communication center controller, the meter box voltage carrier transmission time-frequency characteristics are compared with the meter box voltage carrier reception time-frequency characteristics to determine whether the meter box voltage carrier transmission time-frequency characteristics match the meter box voltage carrier reception time-frequency characteristics. Matching here specifically means that the frequency and amplitude in the current carrier transmission time-frequency characteristics are consistent with the frequency and amplitude in the current carrier reception time-frequency characteristics, or the corresponding difference is within an allowable range. The allowable range can be set and determined as needed and will not be detailed here. When matching, the meter box monitoring device and all distribution box monitoring devices that receive the meter box pulse voltage carrier signal are located in the same branch network.

[0061] During specific implementation, the meter box monitoring topology ID of the meter box monitoring device that is currently transmitting the meter box pulse voltage carrier signal and the corresponding meter box topology connection position status are determined. Generally, the meter box monitoring topology ID of each meter box monitoring device is pre-stored in the communication center controller. According to the meter box monitoring topology ID of the meter box monitoring device, the communication center controller can control the meter box monitoring device to transmit the meter box pulse voltage carrier signal one by one, thereby determining the meter box monitoring topology ID and the meter box topology connection position status of all meter box monitoring devices. Generally, the meter box monitoring topology ID of the meter box monitoring device corresponds to the room where it is located, and the ID of the corresponding room can be obtained. . The meter box topology connection position status specifically refers to the connection status between the meter box monitoring device that is currently transmitting the meter box pulse voltage carrier signal and the corresponding distribution box monitoring device in the same branch network.

[0062] In an embodiment of the present invention, by determining the meter box monitoring topology ID and meter box topology connection position status of all meter box monitoring devices, the communication center controller determines the branch final level connection topology formed by the corresponding connection between the meter box monitoring device and the distribution box monitoring device.

[0063] Furthermore, when identifying the branch main level connection topology, after any distribution box monitoring device generates a distribution box pulse current carrier signal, the generated distribution box pulse current carrier signal and the distribution box current carrier transmission time-frequency characteristics of the distribution box pulse current carrier signal are simultaneously fed into the HPLC network;

[0064] The communication center controller or the distribution box monitoring device that is adaptively connected to the distribution box monitoring device that currently generates the distribution box current carrier signal receives the distribution box pulse current carrier signal and the distribution box pulse current carrier transmission time-frequency characteristics through the HPLC network, and after receiving, uses the Hilbert-Huang transform to extract the distribution box current carrier reception time-frequency characteristics of the received distribution box pulse current carrier signal;

[0065] The communication center controller compares the time-frequency characteristics of the distribution box current carrier transmission and the time-frequency characteristics of the distribution box current carrier reception. When the time-frequency characteristics of the distribution box current carrier transmission match the time-frequency characteristics of the distribution box current carrier reception, the distribution monitoring topology ID of the distribution box monitoring device currently transmitting the distribution box pulse current carrier signal and the corresponding distribution box topology connection position status are determined;

[0066] By determining the distribution monitoring topology IDs of all distribution box monitoring devices and the distribution box connection position states, the communication center controller determines the branch main-level connection topology formed by the corresponding connections of all distribution box monitoring devices.

[0067] In specific implementation, for any distribution box monitoring device, the distribution box pulse current carrier signal emitted is:

[0068]

[0069] Among them, I t is the distribution box pulse current carrier signal, V is the effective value of the mains voltage, f0 is the mains frequency, σ1 is the distribution box monitoring device transmitting the distribution box pulse current carrier signal I at frequency f1 t When t is the duty cycle of the corresponding waveform, R is the equivalent load value of the distribution box monitoring device when transmitting the distribution box pulse current carrier signal; t is the moment when the current distribution box monitoring device transmits the distribution box pulse current carrier signal.

[0070] In the embodiment of the present invention, the effective value V of the mains voltage is generally 220V, and the mains frequency f0 is generally 50Hz. In addition to having the HPLC communication capability, the distribution box monitoring device also needs to have the ability to transmit the distribution box pulse current carrier signal. Specifically, the existing commonly used technical means can be used to achieve the transmission of the distribution box pulse current carrier signal, so as to meet the transmission of the distribution box pulse current carrier signal. For a specific distribution box monitoring device, when transmitting the distribution box pulse current carrier signal I t When , the switching frequency f1, duty cycle σ1 and equivalent load value R can be specifically determined.

[0071] As can be seen from the above description, the communication center controller needs to control the distribution box monitoring device to transmit the distribution box pulse current carrier signal one by one, that is, to control the distribution box monitoring device to generate a corresponding distribution box pulse current carrier signal, and the generated distribution box pulse current carrier signal is fed into the HPLC network, that is, fed into the connected power line. Using the distribution box pulse current carrier signal as a carrier, information transmission can be achieved. During specific implementation, after the distribution box monitoring device generates the pulse current carrier signal, it is also necessary to determine the distribution box current carrier emission time-frequency characteristics of the distribution box pulse current carrier signal. The specific method of determining the current carrier emission time-frequency characteristics of the distribution box pulse current carrier signal can be selected according to needs, such as using the DFT (discrete Fourier transform) method to determine the circuit carrier emission time-frequency characteristics of the distribution box pulse current carrier signal.

[0072] In the embodiment of the present invention, the distribution box monitoring device simultaneously feeds the distribution box pulse current carrier signal and the distribution box current carrier transmission time-frequency characteristics of the distribution box pulse current carrier signal into the HPLC network. It can be seen from the position of the distribution box monitoring device in the topology that the distribution box pulse circuit carrier signal and the distribution box current carrier transmission time-frequency characteristics fed into the HPLC network are received by the communication center controller or the upper-level distribution box monitoring device, which is specifically related to the position of the distribution box monitoring device currently transmitting the distribution box pulse current carrier signal, such as Figure 3As shown. Whether it is the communication center controller or the distribution box monitoring device in the same branch network, after receiving the distribution box pulse current carrier signal, the distribution box current carrier receiving time-frequency characteristics of the received distribution box pulse current carrier signal are obtained by extracting the received distribution box current carrier signal based on the Hilbert-Huang transform. The use of Hilbert-Huang transform to extract the distribution box current carrier receiving time-frequency characteristics of the received distribution box pulse current carrier signal specifically refers to obtaining the frequency and amplitude of the distribution box pulse current carrier signal. The specific calculation process of using the Hilbert-Huang transform to extract the distribution box current carrier receiving time-frequency characteristics is consistent with the existing ones and will not be repeated here.

[0073] When the communication center controller directly receives the distribution box pulse current carrier signal and the distribution box current carrier transmission time-frequency characteristics, the communication center controller directly compares the distribution box current carrier transmission time-frequency characteristics with the distribution box current carrier reception time-frequency characteristics; and when a distribution box monitoring device receives the distribution box pulse current carrier signal and the distribution box current carrier transmission time-frequency characteristics, the distribution box monitoring device will simultaneously transmit the extracted distribution box current carrier reception time-frequency characteristics and the received distribution box current carrier transmission time-frequency characteristics to the communication center controller.

[0074] The communication center controller can compare the time-frequency characteristics of the distribution box current carrier transmission and the time-frequency characteristics of the distribution box current carrier reception. When the time-frequency characteristics of the distribution box current carrier transmission and the time-frequency characteristics of the distribution box current carrier reception match, the distribution monitoring topology ID of the distribution box monitoring device currently transmitting the distribution box pulse current carrier signal and the corresponding distribution box topology connection position status are determined.

[0075] Generally, before topology identification, the communication center controller needs to assign a corresponding unique distribution monitoring topology ID to each distribution box monitoring device, that is, before topology identification, the communication center controller stores the distribution monitoring topology IDs of all distribution box monitoring devices. In specific implementation, the above-mentioned communication center controller needs to control the distribution box monitoring devices to transmit the distribution box pulse current carrier signal one by one. Specifically, it means that the communication center controller controls the distribution box monitoring devices to transmit the distribution box pulse current carrier signal one by one according to the specific order of the distribution monitoring topology ID of the distribution box monitoring device, so that for any distribution box monitoring device that transmits the distribution box pulse current carrier signal, the communication center controller can determine the distribution monitoring topology ID of the current distribution box monitoring device. Therefore, the communication center controller can adopt a roll call method for all distribution box monitoring devices to control the distribution box monitoring devices one by one to generate concurrent distribution box pulse current carrier signals.

[0076] The matching of the distribution box current carrier transmission time-frequency characteristics and the distribution box current carrier reception time-frequency characteristics can be specifically referred to the specific description of the meter box voltage carrier transmission time-frequency characteristics and the meter box voltage carrier reception time-frequency characteristics. The matching method of the two is consistent and will not be repeated here.

[0077] The topological connection position status of the distribution box specifically refers to the connection status between the distribution box monitoring device that transmits the distribution box pulse current carrier signal and the distribution box monitoring device that extracts the receiving time-frequency characteristics of the distribution box current carrier, or the connection status between the distribution box monitoring device that transmits the buried layer current carrier signal of the distribution box and the communication center controller. Generally, the distribution box monitoring device that extracts the receiving time-frequency characteristics of the distribution box current carrier is the upper level of the distribution box monitoring device that transmits the pulse current carrier signal, and the two are physically connected, that is, they are in the same branch network.

[0078] Generally, the pulse current carrier signals transmitted by distribution box monitoring devices at the same level have the same current amplitude, but are transmitted in different time slots, with no overlap. However, the amplitudes of the pulse current carrier signals transmitted by distribution box monitoring devices at different levels vary. The hierarchy specifically refers to the connection position in the topology. Generally, a distribution box monitoring device closer to the communication center controller is the upper level relative to a distribution box monitoring device farther away from the communication center controller.

[0079] Furthermore, after determining the meter box level topology, a meter box monitoring device also transmits a topology verification voltage. After transmitting the topology verification voltage, the meter box level topology where the meter box monitoring device that transmits the topology verification voltage is located is verified and confirmed based on Kirchhoff's current law.

[0080] like Figure 2 As shown, smart monitoring switch A and smart monitoring switch B are two meter box monitoring devices. When verifying and confirming the topology, the topology verification voltage fed into the power line by smart monitoring switch A will generate current signals I1 to I5 of the same frequency at each branch. The same frequency current generated by the branch is specifically the node current corresponding to the incoming and outgoing lines of each room. Specifically, according to Kirchhoff's law:

[0081] I1=I2+I3

[0082] I3=I4+I5

[0083] Kirchhoff's law indicates that the characteristic current I1 detected by intelligent monitoring switch A is always greater than the characteristic current I5 detected by intelligent monitoring switch B. In other words, by detecting and quantifying this characteristic current at the incoming line end of each room, the topology identification results can be verified using the "maximum pulse current principle within the same room." Generally, the topology verification voltage can be the aforementioned pulse voltage carrier signal.

[0084] During specific implementation, the smart monitoring switch A and the smart monitoring switch B are topologically connected to the same distribution box monitoring device. After the branch-level topology is identified, the topology verification voltage fed into the smart monitoring switch A or the smart monitoring switch B is used to determine whether the smart monitoring switch A and the smart monitoring switch B are in the same room.

[0085] Furthermore, the power status parameters of the electrical device monitored by the adapter include voltage, current and / or power factor.

[0086] In an embodiment of the present invention, the adapter is connected to the key monitored electrical equipment through the power line, and uses the built-in metering chip to monitor the status of the electrical equipment in real time, obtaining electrical parameters such as voltage, current, and power factor. For example, electricity consumption information can be collected every 15 minutes, and 96 data points can be collected every day.

[0087] The adapter also needs to have HPLC communication interaction capabilities and the ability to transmit adapter pulse voltage carrier signals. When there are multiple adapters, the communication center controller also needs to control the adapters to transmit adapter pulse voltage carrier signals one by one. The adapter pulse voltage carrier signal transmitted by the adapter can refer to the specific situation of the meter box pulse voltage carrier signal transmitted by the above-mentioned meter box monitoring device. The adapter is generally located in the room, and the adapter is generally physically connected to the corresponding meter box monitoring device, that is, it forms a corresponding topological connection relationship with the meter box monitoring device, that is, the meter box level topology. The communication center controller identifies the meter box level of the adapter and the corresponding meter box monitoring device. Specifically, you can refer to the method and process of the branch terminal connection topology between the meter box monitoring device and the corresponding distribution box monitoring device. For details, please refer to the above description and will not be repeated here.

[0088] The adapter monitors the status of one or more connected electrical devices and automatically initiates a fault alarm if it detects abnormal power parameters. After generating a fault alarm, the communication center controller uses the branch-level topology to locate the specific branch end, that is, the specific meter box monitoring device. It then uses the meter box-level topology to locate the room where the fault occurs, and further locates the specific electrical device based on the adapter's ID address, thus enabling status monitoring of electrical devices in the building.

[0089] Specifically, the specific circumstances of abnormal power parameters can be determined based on the actual monitoring scenario, ensuring compliance with actual power monitoring requirements. As can be seen from the above description, the communication center controller can determine the adapter topology ID of any adapter, the meter box monitoring topology ID of the meter box monitoring device, and the corresponding topological connection location status. Therefore, after initiating a fault alarm, the communication center controller can identify the specific meter box monitoring device and the adapter connected to it that detected the abnormality.

[0090] In summary, a pulse current-based intelligent building management method can be obtained. Specifically, a communication center controller, several distribution box monitoring devices for monitoring the power supply status of distribution boxes, several meter box monitoring devices for monitoring the power supply status of meter boxes, and several adapters for monitoring the power consumption status of electrical equipment are provided. Among them, the distribution box monitoring devices correspond one-to-one with the monitored distribution boxes, and the meter box monitoring devices correspond one-to-one with the monitored meter boxes. The communication center controller, the distribution box monitoring devices, the meter box monitoring devices, and the adapters communicate based on an HPLC network.

[0091] The communication center controller controls the meter box monitoring devices to transmit meter box pulse voltage carrier signals one by one and controls the distribution box monitoring devices to transmit distribution box pulse current carrier signals one by one, so as to determine the branch-level topology formed by the corresponding connections between the communication center controller and all distribution box monitoring devices and all meter box monitoring devices based on the characteristic information of the meter box pulse voltage carrier signals transmitted by each meter box monitoring device and the distribution box pulse current carrier signals transmitted by each distribution box monitoring device;

[0092] After determining the branch-level topology, the communication center controller controls the adapters to transmit corresponding adapter pulse voltage carrier signals one by one, and determines the meter box-level topology formed by the corresponding connection between the adapter and the corresponding meter box monitoring device according to the adapter pulse voltage carrier signal transmitted by each adapter.

[0093] Specifically, the specific conditions of the communication center controller, the distribution box monitoring device, the meter box monitoring device, and the specific process of coordinating to determine the branch-level topology and the meter box-level topology can be referred to the above description and will not be repeated here.

[0094] Depend on Figure 4 From the above description, we can get the specific topology identification process of the present invention:

[0095] Step 1: The communication center controller uses existing common technical means to collect power distribution box monitoring devices, meter box monitoring devices (recording meter power usage information), and power equipment monitoring information recorded by the adapter (not recording meter power usage information, but recording power usage information of power equipment). For example, the monitored information can be communicated and interacted with the communication center controller via an HPLC network;

[0096] Step 2: The communication center controller clears the received historical pulse current carrier signal pulse current I t Through the above steps 1 and 2, the topology recognition process can be initialized.

[0097] Step 3: The communication center controller calls out the designated distribution box monitoring devices to transmit pulse current carrier signals sequentially, ensuring that each distribution box monitoring device transmits its corresponding pulse current carrier signal sequentially without temporal overlap. The data carried by the pulse current carrier signal includes the distribution monitoring topology ID. Each distribution box monitoring device has a unique distribution monitoring topology ID, which is uniformly assigned by the communication center controller.

[0098] Step 4: The communication center controller queries the received characteristic information set in sequence and saves it. The characteristic information set specifically refers to the current carrier transmission time-frequency characteristics and the current carrier reception time-frequency characteristics. The specific situation of the characteristic information set can be referred to the above description and will not be repeated here.

[0099] Step 5: The communication center controller determines the previous connection node of each distribution box monitoring device to determine the branch level topology

[0100] Step 6: The communication center controller calls out the designated meter box monitoring devices to transmit pulse voltage carrier signals in sequence, ensuring that each meter box monitoring device transmits the pulse voltage carrier signal one by one in sequence so that the pulse voltage carrier signals do not overlap in time.

[0101] Step 7: The upper-level distribution box monitoring device performs Hilbert-Huang transform feature extraction on the current determined by the pulse voltage carrier signal to determine the meter-box-level topology. Kirchhoff's law is used to calculate the current at each room's incoming and outgoing line nodes, and the "maximum pulse current principle within the same room" is used to verify the "meter-box-level topology relationship identification."

[0102] Step 8: The adapter uses the built-in metering chip to monitor the status of the electrical equipment in real time, obtain electrical parameters such as voltage, current, and power factor, collect power consumption information every 15 minutes, and upload it to the communication center controller.

[0103] Step 9: The communication center controller analyzes and identifies the room ID to which the electrical device monitored by the adapter belongs. For details on identifying the room ID to which the adapter belongs, please refer to the above description and will not be repeated here.

Claims

1. An intelligent building management system based on pulse current, characterized by: It includes a communication center controller, several distribution box monitoring devices for monitoring the power supply status of the distribution box, several meter box monitoring devices for monitoring the power supply status of the meter box, and several adapters for monitoring the power consumption status of the electrical equipment. The distribution box monitoring devices correspond one-to-one with the monitored distribution boxes, and the meter box monitoring devices correspond one-to-one with the monitored meter boxes. The communication center controller, the distribution box monitoring devices, the meter box monitoring devices, and the adapters communicate based on the HPLC network. The communication center controller controls the meter box monitoring devices to transmit meter box pulse voltage carrier signals one by one and controls the distribution box monitoring devices to transmit distribution box pulse current carrier signals one by one, so as to determine the branch-level topology formed by the corresponding connections between the communication center controller and all distribution box monitoring devices and all meter box monitoring devices based on the characteristic information of the meter box pulse voltage carrier signals transmitted by each meter box monitoring device and the distribution box pulse current carrier signals transmitted by each distribution box monitoring device; After determining the branch-level topology, the communication center controller controls the adapters to transmit corresponding adapter pulse voltage carrier signals one by one, and determines the meter box-level topology formed by the corresponding connection between the adapter and the corresponding meter box monitoring device according to the adapter pulse voltage carrier signal transmitted by each adapter.

2. The intelligent building management system based on pulse current according to claim 1 is characterized in that: The distribution box monitoring device includes a distribution monitoring circuit breaker device and / or a distribution monitoring detection switch device with HPLC communication capability; The meter box monitoring device includes a meter box detection switch device with HPLC communication capability.

3. The intelligent building management system based on pulse current according to claim 1 is characterized in that: For any distribution box monitoring device, the transmitted distribution box pulse current carrier signal is: Among them, I t is the pulse current carrier signal, V is the effective value of the mains voltage, f0 is the mains frequency, σ1 is the distribution box monitoring device transmitting the pulse current carrier signal I at frequency f1 t When t is the duty cycle of the corresponding waveform, R is the equivalent load value of the distribution box monitoring device when transmitting the pulse current carrier signal; t is the moment when the current distribution box monitoring device transmits the distribution box pulse current carrier signal.

4. The intelligent building management system based on pulse current according to any one of claims 1 to 3, characterized in that: When determining the branch-level topology, the communication center controller includes sequentially identifying the branch end-level connection topology and the branch main-level connection topology, wherein the topological connection position status between the meter box monitoring device and the corresponding distribution box monitoring device is determined through the branch end-level connection topology, and the corresponding topological connection position status between the distribution box monitoring devices and between the distribution box monitoring device and the communication center controller is determined through the branch main-level connection topology.

5. The intelligent building management system based on pulse current according to claim 4 is characterized in that: During the branch final connection topology identification, after any meter box monitoring device generates a meter box pulse voltage carrier signal, the generated meter box pulse voltage carrier signal and the meter box voltage carrier emission time-frequency characteristics of the meter box pulse voltage carrier signal are simultaneously fed into the HPLC network; The distribution box monitoring device, which is adapted to be connected to the meter box monitoring device currently generating the meter box pulse voltage carrier signal, receives the meter box pulse voltage carrier signal and the voltage carrier transmission time-frequency characteristics of the meter box pulse voltage carrier signal via the HPLC network, and after receiving the meter box pulse voltage carrier signal, obtains the meter box voltage carrier reception time-frequency characteristics of the meter box pulse voltage carrier signal using Hilbert-Huang extraction, and simultaneously sends the extracted meter box voltage carrier reception time-frequency characteristics and the received meter box voltage carrier transmission time-frequency characteristics to the communication center controller; The communication center controller compares the meter box voltage carrier transmission time-frequency characteristics and the meter box voltage carrier reception time-frequency characteristics. When the meter box voltage carrier transmission time-frequency characteristics match the meter box voltage carrier reception time-frequency characteristics, the communication center controller determines the meter box monitoring topology ID of the meter box monitoring device currently transmitting the meter box pulse voltage carrier signal and the corresponding meter box topology connection position status. By determining the meter box monitoring topology IDs and meter box topology connection position states of all meter box monitoring devices, the communication center controller determines the branch final level connection topology formed by the corresponding connections between the meter box monitoring devices and the distribution box monitoring devices.

6. The intelligent building management system based on pulse current according to claim 5 is characterized in that: During the branch main level connection topology identification, after any distribution box monitoring device generates a distribution box pulse current carrier signal, the generated distribution box pulse current carrier signal and the distribution box current carrier emission time-frequency characteristics of the distribution box pulse current carrier signal are simultaneously fed into the HPLC network; The communication center controller or the distribution box monitoring device that is adaptively connected to the distribution box monitoring device that currently generates the distribution box current carrier signal receives the distribution box pulse current carrier signal and the distribution box pulse current carrier transmission time-frequency characteristics through the HPLC network, and after receiving, uses the Hilbert-Huang transform to extract the distribution box current carrier reception time-frequency characteristics of the received distribution box pulse current carrier signal; The communication center controller compares the time-frequency characteristics of the distribution box current carrier transmission and the time-frequency characteristics of the distribution box current carrier reception. When the time-frequency characteristics of the distribution box current carrier transmission match the time-frequency characteristics of the distribution box current carrier reception, the distribution monitoring topology ID of the distribution box monitoring device currently transmitting the distribution box pulse current carrier signal and the corresponding distribution box topology connection position status are determined; By determining the distribution monitoring topology IDs of all distribution box monitoring devices and the distribution box connection position states, the communication center controller determines the branch main-level connection topology formed by the corresponding connections of all distribution box monitoring devices.

7. The intelligent building management system based on pulse current according to claim 6 is characterized in that: After determining the meter box level topology, a meter box monitoring device also transmits a topology verification voltage. After transmitting the topology verification voltage, the meter box level topology connection position status of the meter box monitoring device that transmits the topology verification voltage is verified and confirmed based on Kirchhoff's current law.

8. The intelligent building management system based on pulse current according to any one of claims 1 to 3, characterized in that: For any meter box monitoring device, the transmitted meter box pulse voltage carrier signal is: V t =A·cos(2πf0t)·(0.5σ2+0.5) Among them, V t is the pulse voltage carrier signal, A is the signal amplitude, σ2 is the duty cycle of the corresponding waveform when the distribution box monitoring device transmits the meter box pulse voltage carrier signal at frequency f2, and t is the meter box pulse voltage carrier signal V t The launch time.

9. The intelligent building management system based on pulse current according to any one of claims 1 to 3, characterized in that: The power status parameters of the power-consuming device monitored by the adapter include voltage, current and / or power factor.

10. A method for intelligent building management based on pulse current, characterized by: Provide a communication center controller, several distribution box monitoring devices for monitoring the power supply status of distribution boxes, several meter box monitoring devices for monitoring the power supply status of meter boxes, and several adapters for monitoring the power consumption status of electrical equipment. The distribution box monitoring devices correspond one-to-one with the monitored distribution boxes, and the meter box monitoring devices correspond one-to-one with the monitored meter boxes. The communication center controller, the distribution box monitoring devices, the meter box monitoring devices, and the adapters communicate based on an HPLC network. The communication center controller controls the meter box monitoring devices to transmit meter box pulse voltage carrier signals one by one and controls the distribution box monitoring devices to transmit distribution box pulse current carrier signals one by one, so as to determine the branch-level topology formed by the corresponding connections between the communication center controller and all distribution box monitoring devices and all meter box monitoring devices based on the characteristic information of the meter box pulse voltage carrier signals transmitted by each meter box monitoring device and the distribution box pulse current carrier signals transmitted by each distribution box monitoring device; After determining the branch-level topology, the communication center controller controls the adapters to transmit corresponding adapter pulse voltage carrier signals one by one, and determines the meter box-level topology formed by the corresponding connection between the adapter and the corresponding meter box monitoring device according to the adapter pulse voltage carrier signal transmitted by each adapter.

Images