Low-voltage user power failure monitoring system based on Internet of Things

Abstract

The invention relates to the technical field of power systems, in particular to a low-voltage user power failure monitoring system based on the Internet of Things, which comprises a central processing unit module, a communication module, a storage module, a supervision module, an alarm module, a power failure monitoring module and a treatment module. Through the arrangement of structures such as the supervision module, the power failure monitoring module and the management module, the operation conditions of an ammeter and a transformer of a user can be monitored factually, the real-time discovery of a low-voltage power grid fault is realized, and a power failure global map in a specified power distribution area is displayed so as to monitor a power failure event; and displaying the monitoring result of the processing process of the power failure event according to the type of the power failure event, so that a decision maker can globally know the power failure event in the power distribution area and the processing process condition of all the power failure events through the power distribution network power failure monitoring system provided by the embodiment of the invention. The power failure event can be monitored and processed in time, and the processing efficiency of the power failure event is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a low-voltage user power outage monitoring system based on the Internet of Things. Background Art

[0002] With the development of society and the advancement of science and technology, the majority of power customers have put forward higher requirements for power supply reliability. For power supply companies, it is crucial to reduce the number of power outages, narrow the scope of power outages and shorten the power outage time.

[0003] In the existing technology, the data platform of the power supply enterprise only collects power outage data of power outage events, and then processes each power outage event individually. It is impossible to globally monitor the power outage events in a certain distribution area. Decision makers cannot understand the power outage events in the distribution area and the processing process of all power outage events from the data platform from a global perspective. Summary of the invention

[0004] The purpose of the present invention is to provide a low-voltage user power outage monitoring system based on the Internet of Things to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: a low-voltage user power outage monitoring system based on the Internet of Things, comprising a central processing unit module, a communication module, a storage module, a supervision module, an alarm module, a power outage monitoring module and a governance module, wherein the central processing unit module is bidirectionally connected with the communication module, the storage module, the supervision module, the power outage monitoring module and the governance module, and the output end of the central processing unit module is connected with the input end of the alarm module; The supervision module includes a collection unit, a processing unit, an analysis unit, a generation unit and an alarm unit; The power outage monitoring module includes a power outage data unit, a power outage display unit and a power outage monitoring unit; The governance module includes a construction unit, a governance unit, a compensation unit, a coordination unit, a supplementation unit and a balance unit.

[0006] Preferably, the collection unit is used to collect user electricity consumption data; The processing unit is used to receive the data collected by the collection unit, identify and process the zero value and the jump value, and eliminate abnormal data; The analysis unit is used to perform topology analysis according to the data situation, locate the fault location and the impact range; The generating unit is used to draw a diagram of the transformer and the power supply range, and generate data with topological analysis capabilities; The alarm unit is used to give a real-time alarm to the fault location and application user located by the analysis unit and to give an alarm through the alarm module, and at the same time send the alarm information to the control terminal through the communication module.

[0007] Preferably, the acquisition unit includes an electric meter data acquisition submodule and a centralization submodule, the electric meter data acquisition submodule is used to acquire, transform and store the electric pulse data of the electric energy meter, and the centralization submodule is used to centrally receive the electric pulse data acquired, transformed and stored by the electric energy data acquisition unit, and send the electric pulse data to the processing unit; The meter data acquisition submodule is connected to a meter data processing subunit and a communication subunit. The meter data processing subunit is connected to the data output end of the electric energy meter and is used to collect, convert and store the electric pulse data output by the electric energy meter. The communication subunit is used to transmit the electric pulse data to the centralized submodule.

[0008] Preferably, the power outage data unit is used to obtain power outage data of a specified power distribution area, the power outage data including the location where the power outage event occurred and the type of the power outage event; The power outage display unit is used to obtain an electronic map of a designated substation, generate a power outage panoramic map according to the location, type and electronic map, and display the power outage panoramic map to monitor the power outage event; The power outage monitoring unit is used to monitor the processing process of the power outage event according to the type of the power outage event in the specified power distribution area, and display the monitoring result.

[0009] Preferably, the construction unit constructs a voltage over-limit sample data model based on a massive amount of historical data samples through a full investigation and data mining of the low voltage problem in the distribution network, extracts the over-limit features of various over-limit causes, trains a voltage over-limit cause analysis model, and implements artificial intelligence analysis of the voltage over-limit causes. At the same time, based on the artificial intelligence distribution network voltage quality optimal algorithm, local autonomous dynamic optimization is implemented to build an algorithm model; The management unit connects the three-phase voltage bridge inverter with automatic phase-changing function in parallel with the distribution network through a reactor or a transformer through a dynamic reactive power management device, and integrates the intelligent controller and SVG in the same device. The SVG detects current information through an external CT, and then forwards the data to the intelligent controller. The reactive power voltage control device analyzes the three-phase imbalance, reactive power, and harmonic conditions of the current distribution system in real time, and combines the coordinated control strategy between reactive power voltage devices, and then sends a compensation signal to the SVG. Finally, the inverter circuit of the SVG sends a compensation current to achieve low-voltage distribution network power quality management; The compensation unit is used to provide targeted real-time optimization decisions for different optimization needs of low-voltage users. When the grid voltage fluctuates, the capacitive reactive current is output to raise the voltage or the inductive reactive current is output to lower the voltage according to the direction of the voltage fluctuation, and the voltage amplitude is maintained between -5% and +5%. The standard value of the voltage amplitude is 220V or 380V. The line voltage distribution is calculated by measuring the collected voltage, current, reactive power, active power, number of low-voltage lines, length and load distribution, and combining the user load forecast, and then the real-time reactive compensation is directly performed after the optimization decision is made; The coordination unit is used to calculate the amount required to compensate for the unbalanced current of the access point, and to exchange information with the communication bus, to obtain information of other reactive control devices while sending its own information, and to generate a coordination control signal, to realize the control of the unbalanced current by the SVG through the negative sequence current loop and the zero sequence current loop, and to reduce the regulation pressure of other reactive control devices; The said supplementary unit is based on the voltage optimization cooperative control technology coordinated with the time difference and the setting value. When a low voltage problem occurs on the user side, the reactive power control device at the front end of the user's electric meter adjusts the user's voltage according to the setting value. If the user's low voltage is not resolved after the set time difference, the adjacent downstream reactive power control device calculates its remaining capacity and compensates for the insufficient capacity of the upstream. In the control strategy of the dynamic and refined reactive power management device of the balancing unit, the realization of control loops such as the DC voltage loop, the negative sequence current loop and the zero sequence current loop and the calculation of the compensation capacity all adopt dq transformation, which effectively improves the compensation speed of SVG and the coordinated control speed of each reactive power control device. At the same time, the system fully utilizes the compensation capacity of each reactive power control device and comprehensively solves the current imbalance of the distribution transformer and the low voltage problem of the end user.

[0010] Preferably, the dynamic reactive power management device is composed of a refined reactive power compensation device and an intelligent controller, and the dynamic reactive power management device is installed in front of the user's electric meter.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes a low-voltage user power outage monitoring system based on the Internet of Things. By providing structures such as a supervision module, a power outage monitoring module, and a governance module, the system can monitor the operation of user meters and transformers, realize real-time discovery of low-voltage power grid faults, and display a global map of power outages in a specified distribution area to monitor power outage events, as well as display monitoring results of the processing process of power outage events according to the type of power outage events. Decision-makers can understand the power outage events in the distribution area and the processing process of all power outage events from a global perspective through the distribution network power outage monitoring system of the embodiment of the present invention, and can monitor and process power outage events in a timely manner, thereby improving the processing efficiency of power outage events. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the system structure of the present invention.

[0013] Figure 2 It is a schematic diagram of the structure of the supervision module of the present invention.

[0014] Figure 3 It is a schematic diagram of the structure of the acquisition unit of the present invention.

[0015] Figure 4 It is a schematic diagram of the structure of the power outage monitoring module of the present invention.

[0016] Figure 5 It is a schematic diagram of the structure of the governance module of the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figures 1 to 5 The present invention provides a technical solution: a low-voltage user power outage monitoring system based on the Internet of Things, including a central processing unit module, a communication module, a storage module, a supervision module, an alarm module, a power outage monitoring module and a governance module, the central processing unit module is bidirectionally connected with the communication module, the storage module, the supervision module, the power outage monitoring module and the governance module, and the output end of the central processing unit module is connected to the input end of the alarm module.

[0019] The supervision module includes a collection unit, a processing unit, an analysis unit, a generation unit and an alarm unit; the collection unit is used to collect user electricity consumption data, and the collection unit includes an electric meter data collection submodule and a centralization submodule. The electric meter data collection submodule is used to collect, transform and store the electric pulse data of the electric energy meter, and the centralization submodule is used to centrally receive the electric pulse data collected, transformed and stored by the electric energy data collection unit, and send the electric pulse data to the processing unit; the electric meter data collection submodule is connected to the electric meter data processing subunit and the communication subunit. The electric meter data processing subunit is connected to the data output end of the electric energy meter, and is used to collect, transform and store the electric pulse data output by the electric energy meter. The communication subunit is used to transmit the electric pulse data to the centralization submodule.

[0020] The processing unit is used to receive the data collected by the acquisition unit, identify and process the zero value and jump value, and eliminate abnormal data; the analysis unit is used to perform topological analysis according to the data situation, locate the fault location and the affected range; the generation unit is used to draw graphics of the transformer and the power supply range, and generate data with topological analysis capabilities; the alarm unit is used to give real-time alarms to the fault location located by the analysis unit and the application user and alarm through the alarm module, and send the alarm information to the control terminal through the communication module.

[0021] The power outage monitoring module includes a power outage data unit, a power outage display unit and a power outage monitoring unit; the power outage data unit is used to obtain the power outage data of the specified distribution area, and the power outage data includes the location where the power outage event occurred and the type of the power outage event; the power outage display unit is used to obtain the electronic map of the specified substation, generate a power outage panoramic map according to the location, type and electronic map, and display the power outage panoramic map to monitor the power outage event; the power outage monitoring unit is used to monitor the processing process of the power outage event according to the type of power outage event in the specified distribution area, and display the monitoring results.

[0022] The governance module includes a construction unit, a governance unit, a compensation unit, a coordination unit, a supplement unit and a balance unit.

[0023] The construction unit conducts comprehensive research and data mining on the low voltage problems in the distribution network, constructs a voltage over-limit sample data model based on massive historical data samples, extracts the over-limit features of various over-limit causes, trains the voltage over-limit cause analysis model, and realizes artificial intelligence analysis of the voltage over-limit causes. At the same time, based on the artificial intelligence-based distribution network voltage quality optimal algorithm, it realizes local autonomous dynamic optimization and constructs an algorithm model.

[0024] The management unit connects the three-phase voltage bridge inverter with automatic phase-changing function in parallel with the distribution network through a reactor or a transformer through a dynamic reactive power management device. The dynamic reactive power management device is composed of a refined reactive power compensation device and an intelligent controller. The dynamic reactive power management device is installed in front of the user's electric meter. At the same time, the intelligent controller and SVG are integrated in the same device. SVG detects current information through an external CT and then forwards the data to the intelligent controller. The reactive power voltage control device analyzes the three-phase imbalance, reactive power, and harmonic conditions of the current distribution system in real time, and combines the coordinated control strategy between reactive power voltage devices, and then sends a compensation signal to SVG. Finally, the inverter circuit of SVG sends a compensation current to achieve low-voltage distribution network power quality management.

[0025] The compensation unit is used to provide targeted real-time optimization decisions for different optimization needs of low-voltage users. When the grid voltage fluctuates, the output capacitive reactive current raises the voltage or the output inductive reactive current lowers the voltage according to the direction of the voltage fluctuation, maintaining the voltage amplitude between -5% and +5%. The standard value of the voltage amplitude is 220V or 380V. The line voltage distribution is calculated by measuring the collected voltage, current, reactive power, active power, number of low-voltage lines, length and load distribution, and combining the user load forecast to calculate the line voltage distribution. After making an optimization decision, real-time reactive compensation is directly performed; the calculation formula for the reactive compensation capacity configuration is as follows: I = MAX [(I max -I ave ),(I ave -I min )],I max ,I min They are the maximum and minimum values ​​of the three-phase apparent current respectively.

[0026] The coordination unit is used to calculate the amount required to compensate for the unbalanced current at the access point and exchange information with the communication bus. It obtains information from other reactive control devices while sending its own information and generates a coordinated control signal. It controls the unbalanced current of the SVG through the negative-sequence current loop and the zero-sequence current loop, while reducing the regulation pressure on other reactive control devices.

[0027] The compensation unit adopts voltage optimization collaborative control technology based on time difference and set value. When low voltage problem occurs on the user side, the reactive power control device at the front end of the user's meter adjusts the user voltage according to the set value. If the user's low voltage is not resolved after the set time difference, the adjacent downstream reactive power control device calculates its remaining capacity and compensates for the insufficient capacity upstream.

[0028] In the control strategy of the dynamic and refined reactive power management device of the balancing unit, the realization of control loops such as the DC voltage loop, negative sequence current loop and zero sequence current loop and the calculation of compensation capacity all adopt dq transformation, which effectively improves the compensation speed of SVG and the coordinated control speed of various reactive power control devices. At the same time, the system makes full use of the compensation capacity of each reactive power control device and comprehensively solves the current imbalance of distribution transformers and low voltage problems of end users.

[0029] In actual use, by setting up structures such as the supervision module, the power outage monitoring module, and the governance module, the operation of user meters and transformers can be monitored in reality, and real-time discovery of low-voltage power grid faults can be achieved. It is realized that a global map of power outages in a specified distribution area can be displayed to monitor power outage events, and the monitoring results of the processing process of power outage events can be displayed according to the type of power outage event. Through the distribution network power outage monitoring system of the embodiment of the present invention, decision makers can understand the power outage events in the distribution area and the processing process of all power outage events from a global perspective, and can monitor and process power outage events in a timely manner, thereby improving the processing efficiency of power outage events.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-voltage user power outage monitoring system based on the Internet of Things, characterized by: It includes a central processing unit module, a communication module, a storage module, a supervision module, an alarm module, a power outage monitoring module and a management module. The central processing unit module is bidirectionally connected with the communication module, the storage module, the supervision module, the power outage monitoring module and the management module. The output end of the central processing unit module is connected to the input end of the alarm module. The supervision module includes a collection unit, a processing unit, an analysis unit, a generation unit and an alarm unit; The power outage monitoring module includes a power outage data unit, a power outage display unit and a power outage monitoring unit; The governance module includes a construction unit, a governance unit, a compensation unit, a coordination unit, a supplementation unit and a balance unit.

2. According to the Internet of Things-based low-voltage user power outage monitoring system of claim 1, it is characterized by: The collection unit is used to collect user electricity consumption data; The processing unit is used to receive the data collected by the collection unit, identify and process the zero value and the jump value, and eliminate abnormal data; The analysis unit is used to perform topology analysis according to the data situation, locate the fault location and the impact range; The generating unit is used to draw a diagram of the transformer and the power supply range, and generate data with topological analysis capabilities; The alarm unit is used to give a real-time alarm to the fault location and application user located by the analysis unit and to give an alarm through the alarm module, and at the same time send the alarm information to the control terminal through the communication module.

3. According to the Internet of Things-based low-voltage user power outage monitoring system of claim 1, it is characterized by: The acquisition unit includes an electric meter data acquisition submodule and a centralization submodule. The electric meter data acquisition submodule is used to acquire, transform and store the electric pulse data of the electric energy meter. The centralization submodule is used to centrally receive the electric pulse data acquired, transformed and stored by the electric energy data acquisition unit, and send the electric pulse data to the processing unit. The meter data acquisition submodule is connected to a meter data processing subunit and a communication subunit. The meter data processing subunit is connected to the data output end of the electric energy meter and is used to collect, convert and store the electric pulse data output by the electric energy meter. The communication subunit is used to transmit the electric pulse data to the centralized submodule.

4. According to the Internet of Things-based low-voltage user power outage monitoring system of claim 1, it is characterized by: The power outage data unit is used to obtain power outage data of a specified power distribution area, the power outage data including the location where the power outage event occurred and the type of the power outage event; The power outage display unit is used to obtain an electronic map of a designated substation, generate a power outage panoramic map according to the location, type and electronic map, and display the power outage panoramic map to monitor the power outage event; The power outage monitoring unit is used to monitor the processing process of the power outage event according to the type of the power outage event in the specified power distribution area, and display the monitoring result.

5. The low-voltage user power outage monitoring system based on the Internet of Things according to claim 1 is characterized by: The construction unit constructs a voltage over-limit sample data model based on a large amount of historical data samples through a full investigation and data mining of the low voltage problem in the distribution network, extracts the over-limit features of various over-limit causes, trains a voltage over-limit cause analysis model, and implements artificial intelligence analysis of the voltage over-limit causes. At the same time, based on the artificial intelligence distribution network voltage quality optimal algorithm, local autonomous dynamic optimization is achieved to build an algorithm model; The management unit connects the three-phase voltage bridge inverter with automatic phase-changing function in parallel with the distribution network through a reactor or a transformer through a dynamic reactive power management device, and integrates the intelligent controller and SVG in the same device. The SVG detects current information through an external CT, and then forwards the data to the intelligent controller. The reactive power voltage control device analyzes the three-phase imbalance, reactive power, and harmonic conditions of the current distribution system in real time, and combines the coordinated control strategy between reactive power voltage devices, and then sends a compensation signal to the SVG. Finally, the inverter circuit of the SVG sends a compensation current to achieve low-voltage distribution network power quality management; The compensation unit is used to provide targeted real-time optimization decisions for different optimization needs of low-voltage users. When the grid voltage fluctuates, the capacitive reactive current is output to raise the voltage or the inductive reactive current is output to lower the voltage according to the direction of the voltage fluctuation, and the voltage amplitude is maintained between -5% and +5%. The standard value of the voltage amplitude is 220V or 380V. The line voltage distribution is calculated by measuring the collected voltage, current, reactive power, active power, number of low-voltage lines, length and load distribution, and combining the user load forecast, and then the real-time reactive compensation is directly performed after the optimization decision is made; The coordination unit is used to calculate the amount required to compensate for the unbalanced current of the access point, and to exchange information with the communication bus, to obtain information of other reactive control devices while sending its own information, and to generate a coordination control signal, to realize the control of the unbalanced current by the SVG through the negative sequence current loop and the zero sequence current loop, and to reduce the regulation pressure of other reactive control devices; The said supplementary unit is based on the voltage optimization cooperative control technology coordinated with the time difference and the setting value. When a low voltage problem occurs on the user side, the reactive power control device at the front end of the user's electric meter adjusts the user's voltage according to the setting value. If the user's low voltage is not resolved after the set time difference, the adjacent downstream reactive power control device calculates its remaining capacity and compensates for the insufficient capacity of the upstream. In the control strategy of the dynamic and refined reactive power management device of the balancing unit, the realization of control loops such as the DC voltage loop, the negative sequence current loop and the zero sequence current loop and the calculation of the compensation capacity all adopt dq transformation, which effectively improves the compensation speed of SVG and the coordinated control speed of each reactive power control device. At the same time, the system fully utilizes the compensation capacity of each reactive power control device and comprehensively solves the current imbalance of the distribution transformer and the low voltage problem of the end user.

6. The low-voltage user power outage monitoring system based on the Internet of Things according to claim 5 is characterized by: The dynamic reactive power management device is composed of a refined reactive power compensation device and an intelligent controller, and the dynamic reactive power management device is installed in front of the user's electric meter.

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