Topology measurement device, communication module, metering device and system

Abstract

The present invention provides a device for measuring a topological structure, the device comprising: a switch control circuit and a load circuit; wherein the switch control circuit comprises: a drive circuit for controlling the on and off of a load switch, the drive circuit being provided with a control signal input terminal; the load circuit being composed of a load unit and a load switch connected in series. The device provided by the present invention can be set in any metering node in a substation system, and the load unit can be connected to the power supply circuit by means of an operation command of the substation system, and the substation system can detect the active and / or reactive consumption data of the load by means of meter reading data, and then based on the node information having the same active and / or reactive consumption data, the topological position of the node in the substation system can be measured at a very low cost.

Description

Technical Field

[0001] The present invention relates to electric power measurement technology, and in particular to a topology structure measurement device, a communication module, a metering device and a system. Background Art

[0002] Smart grid can realize automatic meter reading and automatic billing by using the area system including smart meters, so that the power department can save a lot of manpower costs. Figure 1 , this is a schematic diagram of the power grid topology of all metering nodes in a substation system, which is mainly composed of different metering nodes (hereinafter collectively referred to as: nodes) such as the station master meter 100, branch switches 201-222, meter box meters 311-335, and smart meters 411-435; wherein, the station master meter 100 includes a substation concentrator, which is used to measure the total power consumption of the substation and control all metering nodes in the substation area to communicate in a power carrier communication mode, so as to control each metering node to copy the corresponding power data and upload it to the concentrator; under normal circumstances, except for the station master meter 100 which is usually one, the number of other node devices is one or more.

[0003] The automatic meter reading system can usually only read the data such as the amount of electricity, power, voltage and current of each node in the substation system, and these data cannot reflect the hierarchical relationship between the nodes and the overall topological structure of the substation system; for example, it cannot reflect the hierarchical node relationship between the smart meter 411 and the branch switch 211 and the branch switch 201. However, the unclear tree-like topological structure of the substation system makes it extremely difficult to manage the line loss in the substation, and it is very difficult for on-site maintenance electricians to check the line loss, which makes the power department pay huge operating costs due to high line loss for a long time.

[0004] In order to solve the above-mentioned problems, in recent years, a current input method (short-circuit method) has been used to send a short-circuit pulse at any node (for example, smart meter 435), and a current transformer CT is used at the parent node (meter box 335) and other nodes of the node to detect the signal formed by the short-circuit pulse. By using the polarity of the current transformer CT, a positive pulse will be obtained at the parent node (meter box 335) and the grandfather node (branch switch 203), and a negative pulse will be obtained at other nodes, thereby obtaining the superior-subordinate relationship between the above-mentioned node (smart meter 435) and each other node in the substation system. By traversing all the nodes in the entire substation system using the above-mentioned method, the overall topology diagram of the entire substation system including all nodes can be obtained. Based on the obtained topology map, according to the principle that the sum of the power of all nodes under the same parent node is equal to the power of the parent node, the search range of the specific location where line loss occurs in the substation system can be quickly narrowed, and even the specific location where line loss occurs in the substation system can be accurately located. This provides specific guidance information for the on-site inspection work of maintenance electricians, so that related problems can be quickly and properly resolved.

[0005] Although the aforementioned technical solution is available, its use will cause each node in the substation system to increase its cost significantly. Based on the current price level, the average cost of each node will increase by RMB 100. This is undoubtedly a heavy cost burden for a power network with hundreds of thousands of nodes, which makes it difficult to promote and apply this technical solution. Summary of the invention

[0006] The first aspect of the present invention aims to provide a device for measuring topological structure, which can be set at a relatively low cost on any node in a substation system to measure the topological position of the node in the substation system.

[0007] The purpose of the first aspect of the present invention is achieved through the following technical solution: a device for measuring a topological structure is provided, the device comprising: a switch control loop and a load loop; wherein the switch control loop comprises: a drive circuit for controlling the on and off of a load switch, the drive circuit being provided with a control signal input terminal; the load loop is composed of a load unit and a load switch connected in series.

[0008] The device provided in the first aspect of the present invention can be set in any metering node in the substation system, and can connect the load unit to the power supply circuit with the help of the operation command of the substation system. The substation system can detect the active and / or reactive consumption data of the load with the help of meter reading data, and then based on the node information with the same active and / or reactive consumption data, the topological position of the node in the substation system can be measured at an extremely low cost.

[0009] The second aspect of the present invention aims to provide a communication module for measuring power topology structure, wherein the communication module is provided with a low-cost topology structure measuring device for measuring the topological position of the node where the communication module is located in the substation system.

[0010] The purpose of the second aspect of the present invention is achieved through the following technical solution: a communication module is provided, which includes: a control unit, a load power supply and a working power supply; also includes a switch control circuit and a load circuit; wherein the switch control circuit is provided with a drive circuit for controlling the load switch to be connected and disconnected, and the drive circuit is provided with a control signal input terminal; the working power supply is connected to the switch control circuit power supply; the control unit is connected to the control signal input terminal; the load circuit is composed of a load unit and a load switch connected in series, and is connected to the load power supply.

[0011] The communication module provided in the second aspect of the present invention can be set in any metering node in the substation system, and the load unit in the communication module can be connected to the power supply circuit with the help of the operation command of the substation system. The substation system can detect the active and / or reactive consumption data of the load with the help of meter reading data, and then based on the node information with the same active and / or reactive consumption data, the topological position of the node in the substation system can be measured at an extremely low cost.

[0012] The third aspect of the present invention aims to provide a metering device for measuring electric power topology, wherein the metering device is provided with a low-cost topology structure measuring device for measuring the topological position of the metering device in a substation system.

[0013] The purpose of the third aspect of the present invention is achieved through the following technical solution: a metering device is provided, which includes an electric energy metering circuit and a communication module that are connected to each other for communication; the communication module includes a control unit, a load power supply and a working power supply, and also includes a switch control circuit and a load circuit; wherein the switch control circuit includes: a drive circuit for controlling the on and off of the load switch, the drive circuit is provided with a control signal input terminal; the working power supply is connected to the switch control circuit power supply; the control unit is connected to the control signal input terminal; the load circuit is composed of a load unit and a load switch connected in series, and is connected to the load power supply.

[0014] Any metering device provided in the third aspect of the present invention serves as a metering node in a substation system. Since it has the aforementioned communication module, which has a topology structure measuring device, the load unit in the communication module can be connected to the power supply circuit with the help of the operation command of the substation system, and the substation system can detect the active and / or reactive consumption data of the load with the help of meter reading data, and then based on the node information with the same active and / or reactive consumption data, the topological position of the node in the substation system can be measured at an extremely low cost.

[0015] The fourth aspect of the present invention aims to provide a substation system for measuring power topology, which is composed of a metering device having a topology measurement device, and can obtain a topology diagram within the entire substation system at a relatively low cost.

[0016] A fourth aspect of the present invention provides a system having an electric power topology measurement device, comprising: a concentrator, one or more metering devices, and a topology measurement unit corresponding to the metering device; the topology measurement unit is connected to the metering device; the concentrator and the metering device are connected to each other in a tree structure, and the concentrator is arranged at the top of the tree structure;

[0017] The concentrator is composed of a central control unit, a meter reading unit and a topology detection unit connected to each other, wherein the central control unit is in communication connection with the meter reading unit, and the central control unit and the meter reading unit are respectively in communication connection with the topology detection unit;

[0018] The metering device includes an electric energy metering circuit and a communication module that are communicatively connected to each other; the communication module includes a control unit, a load power supply and a working power supply; the communication module also includes a switch control circuit and a load circuit; wherein the switch control circuit includes: a drive circuit for controlling the on and off of the load switch, the drive circuit is provided with a control signal input terminal; the working power supply is connected to the switch control circuit power supply; the control unit is connected to the control signal input terminal; the load circuit is composed of a load unit and a load switch connected in series, and is connected to the load power supply.

[0019] The system provided by the fourth aspect of the present invention, in which any one of the metering devices serves as a metering node in the substation system, has the aforementioned communication module, and the communication module has a topology structure measurement device. Therefore, the load unit in the communication module can be connected to the power supply circuit with the help of the operation command of the substation system, and the substation system can detect the active and / or reactive consumption data of the load with the help of the meter reading data, and then based on the node information with the same active and / or reactive consumption data, the topological position of the node in the substation system can be measured at an extremely low cost.

[0020] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments of the present invention: BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the topological structure of the substation system of the present invention;

[0022] Figure 2 It is a circuit principle block diagram of the topological structure measuring device of the present invention;

[0023] Figure 3 A circuit diagram of a first specific implementation of a topology structure measuring device according to the present invention;

[0024] Figure 4 A circuit diagram of a second specific implementation of the topology structure measuring device of the present invention;

[0025] Figure 5 A circuit diagram of a third specific implementation mode of a topology structure measuring device of the present invention;

[0026] Figure 6 A circuit diagram of a fourth specific implementation mode of a topology structure measuring device of the present invention;

[0027] Figure 7a Figure 7b and Figure 7c A circuit diagram of a type of load loop in a topology structure measuring device of the present invention;

[0028] Figure 8a Figure 8b Figure 8c and Figure 8d A circuit diagram of another type of load loop in the topology structure measuring device of the present invention;

[0029] Figure 9a , Figure 9b , Fig.9c and Figure 9d A circuit diagram of another type of load loop in the topology structure measuring device of the present invention;

[0030] Fig.10a Fig.10b and Fig.10c A circuit diagram of another type of load loop in the topology structure measuring device of the present invention;

[0031] Fig.11 is a principle block diagram of the communication module of the present invention;

[0032] Fig.12 This is a circuit diagram of a first specific implementation mode of the communication module of the present invention;

[0033] Fig.13This is a circuit diagram of the second specific implementation mode of the communication module of the present invention;

[0034] Fig.14 It is a principle block diagram of a specific implementation mode of the metering device of the present invention;

[0035] Fig.15 This is a principle block diagram of the concentrator of the present invention. DETAILED DESCRIPTION

[0036] See also Figure 2 The topology structure measuring device 50 of the present invention is provided with a switch control circuit 501 and a load circuit 502; wherein the switch control circuit 501 is provided with a drive circuit for controlling the on and off of the load switch, and the drive circuit is provided with a control signal input terminal CTR; the load circuit 502 is composed of a load switch S and a load unit Z connected in series.

[0037] In actual use, the aforementioned control signal input terminal CTR is connected to the control I / O signal output by the upper control device; and the load circuit 502 is connected to the main power circuit of the measured node. For example: in a civil power supply system, the two ends of the load circuit 502 are respectively connected to the live wire UL and the neutral wire UN of the power supply.

[0038] See also Figure 1 and Figure 2 The scheme for using the aforementioned topology structure measurement device to specifically measure the topology structure in a substation system is as follows: the substation system sends a topology measurement command to a specific metering node, such as the smart meter 441, and the command reaches the switch control circuit 501 of the topology structure measurement device in the form of a control signal CTR enable, so that the switch control circuit 501 sends a switch control signal to close the switch S in the load circuit 502 within a specified time period, so that the load Z is connected to the live wire UL and the neutral wire UN of the power supply of the metering node within the given time period; in this way, in this time period, an additional power consumption will be generated between the live wire UL and the neutral wire UN of the power supply, and this additional power consumption will be collected by the smart meter 441 and sent to the concentrator of the substation system using the automatic meter reading system.

[0039] Obviously, based on Figure 1The topological structure of the smart meter 441, the additional power consumption collected by the smart meter 441 will inevitably be reflected in the upper-level metering node 324, the upper-level metering node 222, and the upper-level node 202, until the station master table 100, and will not be reflected in any node of any other topological branch. Using this scheme, all the metering nodes with additional power consumption are traversed, and the direct or indirect upper and lower topological relationship information between all metering nodes on the topological branch where the smart meter 441 is located can be obtained. Further using the aforementioned scheme, all metering nodes in the entire substation system are traversed, and the direct or indirect upper and lower topological relationship information between all metering nodes on all topological branches can be obtained. In this way, the topological relationship diagram of all metering nodes in the entire substation system can be obtained.

[0040] Since the switch circuit and the load circuit in the topology structure measuring device of the present invention can be formed by using cheap semiconductor electronic devices, such as resistors, capacitors, transistors, etc., the price of each topology structure measuring device of the present invention can be extremely low. According to the current price, each topology structure measuring device can be obtained for only a few RMB yuan. Compared with the aforementioned prior art solutions, the application cost is greatly reduced, and it can be widely used on a large scale.

[0041] In the following series of specific implementations of the topology structure measuring device of the present invention, various specific implementation circuits of the topology structure measuring device of the present invention are provided:

[0042] See also Figure 3 , which is a circuit diagram of a specific embodiment of the topology structure measuring device of the present invention. In this circuit, the control signal CTR controls the conduction and cutoff of the transistor Q2a in the switch control loop 501a, so that the current from the power supply VCC is applied to the primary side of the transformer T, or vice versa. In the case of applying current to the primary side of the transformer T, the current is transmitted to its secondary side by the transformer T, and outputted through the rectifier diodes D1a and D3a through the resistor R2a to control the conduction of the thyristor Q1a in the load loop 502a, and the load Z in the load loop 502a is connected between the live line UL and the neutral line UN of the power supply.

[0043] See also Figure 4 , which is a circuit diagram of another specific embodiment of the topology structure measuring device of the present invention. In this circuit, the control signal CTR controls the on and off of the transistor Qb in the switch control loop 501b, so that the current from the power supply VCC flows through the coil MC of the relay J, or vice versa. When the current is applied to the coil MC of the relay J, the normally open contact JC of the relay J is closed, thereby connecting the load Z in the load loop 502b between the live line UL and the neutral line UN of the power supply.

[0044] See also Figure 5 , which is a circuit diagram of another specific embodiment of the topological structure measuring device of the present invention. In this circuit, the control signal CTR controls the on and off of the transistor Q2c in the switch control loop 501c, so that the current from the power supply VCC is applied to the light source loop of the photocoupler U1, or vice versa. When the current is applied to the light source loop of the photocoupler U1, the photosensitive transistor in the photocoupler U1 works, and the thyristor Q1c in the load loop 502c is controlled to turn on through the resistor R2c, and the load Z in the load loop 502c is connected between the live wire UL and the neutral wire UN of the power supply.

[0045] See also Figure 6 , which is a circuit diagram of another specific implementation of the topology structure measuring device of the present invention. In this circuit, the control signal CTR controls the conduction and disconnection of the transistor Q2d in the switch control loop 501d, so that the current from the power supply VCC controls the switch transistor Q1d in the load loop 502d to be turned on via the resistor R2d, and the load Z in the load loop 502d is connected between the live wire UL and the neutral wire UN of the power supply. In addition, the switch transistor Q1d in the aforementioned circuit can also be replaced by a field effect transistor (Field Effect Transistor, abbreviated as: FET) or an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, abbreviated as: IGBT). Regardless of whether a field effect transistor or an IGBT transistor is used to replace the aforementioned switch transistor Q1d, its switch control loop can adopt the switch control loop 501d in this specific implementation. Therefore, the specific topology structure measuring device using a field effect transistor or an IGBT transistor will not be given separately. Based on the teachings of the specification of the present invention and in combination with their familiar knowledge of electronic technology, a person of ordinary skill in the art can use a field effect transistor or an IGBT transistor to replace the switching transistor Q1d in the circuit of this specific implementation scheme without any creative work.

[0046] It should be further explained that: in the load loop 502d of the circuit in this specific implementation manner, a magnetic bead Ld is also connected in series, which is usually used to increase the stability of the signal; but in the actual circuit, this magnetic bead can also be omitted like the aforementioned several topology structure measurement device circuits.

[0047] In all the above-mentioned specific embodiments of the present invention, the load Z in the load loop 502d can have various types of load network structures; see Figure 7a , the load Z can be composed of a single resistor R. When the resistor R is connected between the live wire UL and the neutral wire UN of the power supply, it consumes the active power of the power supply; see Figure 7b or Figure 7c , the load Z can also be a separate capacitor C or inductor L. When the capacitor C or inductor L is connected between the live wire UL and the neutral wire UN of the power supply, it consumes the reactive power of the power supply. Whether it is active power or reactive power, it can be collected by the corresponding metering nodes.

[0048] The load Z in the load loop 502d may be composed of a single resistor, capacitor or inductor, or a resistor, capacitor and / or inductor connected in series, in parallel or in series.

[0049] See also Figure 8a , Figure 8b , Figure 8c and Figure 8d , they show that the load Z is composed of a resistor R and a capacitor C in series, or a resistor R and an inductor L in series, or a capacitor C and an inductor L in series, or a resistor R and a capacitor C and an inductor L in series.

[0050] See also Figure 9a , Figure 9b , Fig.9c and Figure 9d , which show that the load Z is respectively composed of a resistor R and a capacitor C in parallel, or a resistor R and an inductor L in parallel, or a capacitor C and an inductor L in parallel, or a resistor R, a capacitor C and an inductor L in parallel.

[0051] See also Fig.10a , Fig.10b and Fig.10c , which show that the load Z is respectively composed of a resistor R and a capacitor C in parallel and then in series with an inductor L, or a resistor R and an inductor L in parallel and then in series with the capacitor C, or a capacitor C and an inductor L in parallel and then in series with the resistor R.

[0052] The aforementioned Figure 8a-Figure 10c The specific circuits of the 11 loads Z consume both active power and reactive power.

[0053] It should be noted that: in addition to the specific circuit of the load Z specifically given in the present invention, those skilled in the art can also provide a more complex circuit structure of the load Z, but no matter how complex it is, it can be equivalently transformed into the above Figure 7a-Figure 10c Therefore, the present invention will not elaborate on the more complicated circuit structure.

[0054] All the above-mentioned specific implementations of the present invention can be used as a discrete circuit to form an independent topology structure measurement device, or can be a component of the metering node of the present invention and integrated into a chip, a unit or a module of the metering node; how to implement it specifically can be designed by those skilled in the art according to specific engineering requirements, and the present invention does not make any specific limitation on this.

[0055] As mentioned above, the metering node usually has an important part in addition to the part with metering function, that is, the communication module. In the existing metering nodes, the role of the communication module is mainly to communicate with the concentrator of the substation system in the form of power carrier, receive the meter reading commands and other operation instructions issued by the concentrator, and send the metering data collected by the metering unit of the metering node to the concentrator. In order to conveniently obtain the aforementioned access to an additional load at a metering node, it can be considered to set the aforementioned topology measurement device in a communication module so that the communication module has the function of supporting topology measurement.

[0056] See also Fig.11 In one embodiment of the communication module of the present invention, a communication module 60 having the topology structure measurement device in the above-mentioned various specific embodiments is provided. The communication module 60 is provided with a control unit, a load power supply and a working power supply, wherein the load power supply and the working power supply are both output through a wiring port 601; in order to realize the topology structure measurement, the wiring port 601 is also connected to the switch control loop 501 and the load loop 502 respectively. Figure 2-Figure 6 , the switch control loop 501 and the load loop 502 together constitute the topology structure measuring device 50 as described above. The power supply VCC in the connection port 601 supplies power to the switch control loop 501, and the control signal CTR is connected to the control signal input terminal of the switch control loop 501 driving circuit. The live wire UL and the neutral wire UN of the power supply are provided to the load loop for the load Z to connect to generate an additional load. For the specific structure of the switch control loop 501 and the load loop 502 in the communication module 60 of the present invention, please refer to the various specific embodiments of the topology structure measuring device 50 of the present invention, which will not be repeated here.

[0057] See also Fig.12In the first specific implementation of the communication module of the present invention, a communication module 60 having the topology structure measuring device 50 in the above-mentioned various specific implementations is provided. The communication module 60 is internally provided with a connection port 601, a control unit 602, a carrier modulation and demodulation unit 603, a carrier signal processing unit 604 and a working power supply 605; wherein the working power supply 605 provides a power supply VCC to the connection port 601; the control unit 602 provides a control signal CTR to the connection port 601; and the carrier signal processing unit 604 is connected to the live wire UL and the neutral wire UN of the power supply of the connection port. The power supply VCC in the connection port 601 supplies power to the above-mentioned switch control loop 501, and the control signal CTR is connected to the control signal input end of the switch control loop 501 driving circuit, and the live wire UL and the neutral wire UN of the power supply are provided to the load loop for the load Z to connect to generate an additional load. As in the above-mentioned specific implementation, the specific structure of the switch control loop 501 and the load loop 502 in the above-mentioned communication module 60 of the present invention can be referred to the above-mentioned various specific implementations of the topology structure measuring device 50 of the present invention, which will not be repeated here.

[0058] See also Fig.12 In the second specific implementation manner of the communication module of the present invention, a circuit structure that is almost identical to the first specific implementation manner mentioned above is provided; the difference from the first specific implementation manner mentioned above is that: in this specific implementation manner, a data cache unit 606 for temporarily storing metering data of the metering node is added, and the data cache unit 606 and the control unit 602.

[0059] As is known to all, when reading meters, the existing substation system often only needs to collect metering data once for all metering nodes in the substation system. However, for some substation systems with too many metering nodes, it may take a long time to collect data by traversing all metering nodes in the entire substation system, and it is difficult to collect data from all metering nodes in a relatively short time period. Therefore, it may be necessary to make all metering nodes collect metering data multiple times in a relatively sufficient time period, and then upload them to the concentrator for analysis. Therefore, the communication module in the original metering node needs to add a data cache unit 606 to store the metering data collected multiple times for the metering node where the communication module is located in the aforementioned time period. In addition, as with the aforementioned specific implementation, the various components and connection structures in the aforementioned communication module 60 of the present invention, as well as the specific composition of the switch control loop 501 and the load loop 502, can be referred to the aforementioned various specific implementations of the topology structure measurement device 50 of the present invention, which will not be repeated here.

[0060] See also Figure 1In the substation system involved in the present invention, the metering nodes may be the station master meter 100, the branch switches 201-222, the meter box meters 311-335 and the smart meters 411-435; except that the station master meter 100 is usually integrated with the concentrator, there is no need to report metering data, and no communication module is required, all other types of metering nodes need to be provided with a communication module to realize the metering data collection and reporting functions. Therefore, the present invention provides a metering device for topological structure measurement, and the metering nodes formed by the device, whether they are branch switches, meter box meters, or smart meters, can achieve the purpose of topological structure measurement.

[0061] See also Fig.14 , which is a principle block diagram of a specific implementation method of the metering device of the present invention; the metering device 70 includes an electric energy metering circuit 701 and a communication module 60 that are connected to each other for communication; the communication module 60 includes a control unit, a load power supply and a working power supply; the communication module 60 also includes a switch control circuit 501 and a load circuit 602.

[0062] For the specific structure of the communication module 60, please refer to Fig.11 , Fig.12 and Fig.13 The specific implementations of various communication modules shown and the corresponding descriptions above. In the overall implementation of the communication module of the present invention, a communication module 60 having the topology structure measurement device in the above-mentioned various specific implementations is provided. The communication module 60 is provided with a control unit, a load power supply and a working power supply, wherein the load power supply and the working power supply are both output through a wiring port 601; in order to realize the topology structure measurement, the wiring port 601 is also connected to the switch control loop 501 and the load loop 502 respectively. See Figure 2-Figure 6 The switch control loop 501 and the load loop 502 together constitute the aforementioned topology structure measurement device 50. The power supply VCC in the connection port 601 supplies power to the aforementioned switch control loop 501, and the control signal CTR is connected to the control signal input terminal of the switch control loop 501 drive circuit, and the live line UL and the neutral line UN of the power supply are provided to the load loop for the load Z to connect to generate an additional load.

[0063] See also Fig.12In the first specific implementation manner of the communication module of the present invention, a communication module 60 having the topology structure measuring device 50 of the aforementioned specific implementation manner is provided. The communication module 60 is internally provided with a connection port 601, a control unit 602, a carrier modulation and demodulation unit 603, a carrier signal processing unit 604 and a working power supply 605; wherein the working power supply 605 provides power supply VCC to the connection port 601; the control unit 602 provides a control signal CTR to the connection port 601; and the carrier signal processing unit 604 is connected to the live wire UL and the neutral wire UN of the power supply of the connection port. The power supply VCC in the connection port 601 supplies power to the aforementioned switch control loop 501, and the control signal CTR is connected to the control signal input terminal of the switch control loop 501 drive circuit, and the live wire UL and the neutral wire UN of the power supply are provided to the load loop for the load Z to connect to generate an additional load. See. Fig.12 In the second specific implementation of the communication module of the present invention, a circuit structure almost identical to the first specific implementation is provided; the difference from the first specific implementation is that in this specific implementation, a data cache unit 606 for temporarily storing metering data of the metering node is added, and the data cache unit 606 and the control unit 602. In addition, as in the above specific implementation, the various components and connection structures of the communication module 60 of the present invention, as well as the specific construction of the switch control loop 501 and the load loop 502, can be referred to the above specific implementations of the topology structure measurement device 50 of the present invention, and will not be repeated here.

[0064] In fact, the aforementioned meter box meter and smart meter are basically the same in terms of electric energy metering and communication functions, except for the difference in the measured electric energy reading range; the same is true for each branch switch, except for the difference in the measured electric energy reading range and the current passing capacity of the switch, the electric energy metering and communication functions are basically the same, and compared with the meter box meter and smart meter, the branch switch is basically the same in terms of electric energy metering and communication functions, except for the difference in the measured electric energy reading range. Therefore, the aforementioned metering device of the present invention is applicable to any metering node in the present invention. See Fig.14 , the difference between each metering node is also limited to the external unit 702. For example, for a branch switch, the external unit 702 is connected to a circuit used to control the on and off of the main circuit switch. Of course, the external unit 702 can also be directly connected to the communication port 607 of the communication module 60, and the communication port 607 directly sends out the external unit to perform operations other than metering.

[0065] Based on all the above technical solutions of the present invention, on the basis of the existing technology, if the metering unit with the above topological measurement technical solution of the present invention is replaced in the substation system, it can bring extremely convenient and accurate topological measurement function with extremely low cost investment, and provide extremely convenient material basis and technical means for line loss fault finding, line equipment repair / maintenance and transformation in the substation system. For this purpose, see Figure 1 , Fig.14 and Fig.15 , the following specific implementation of the present invention also provides a system with a power topology measurement device, including: a concentrator 80, and more than one metering device 70; the concentrator 80 and the metering device 70 are connected to each other in a tree structure, and the concentrator 80 is arranged at the top position of the tree structure;

[0066] See also Fig.15 , the central control unit 801 of the concentrator 80 is respectively connected to the meter reading unit 802 via the communication interface 811, and the meter reading unit 802 is connected to the topology detection unit 803 via the communication interface 812. The topology detection unit 803 is actually a unit specially used to control each metering node in the entire substation system for the purpose of detecting the internal topology structure of the substation system; when the topology structure detection operation needs to be performed, the circuit inside the topology detection unit 803 will cut off the communication connection between the central control unit 801 and the meter reading unit 802; thereafter, the topology detection unit 803 will traverse the metering nodes of the various specific implementation methods of the present invention in the entire substation system, and finally obtain the meter reading data of all metering nodes, and based on these meter reading data, after calculation and processing, finally obtain the topology structure information of the entire substation system. After completing the topology detection work, the topology detection unit 803 reopens the communication connection between the central control unit 801 and the meter reading unit 802, so that the concentrator 80 is restored to the existing meter reading process.

[0067] Regarding the aforementioned metering device 70, see Figure 11-14 , which is composed of an electric energy metering circuit 70 and a communication module 60 connected to each other in communication; the communication module 60 is internally provided with a connection port 601, a control unit 602, a carrier modulation and demodulation unit 603, a carrier signal processing unit 604 and a working power supply 605; wherein the working power supply 605 provides a power supply VCC to the connection port 601; the control unit 602 provides a control signal CTR to the connection port 601; the carrier signal processing unit 604 is connected to the live wire UL and the neutral wire UN of the power supply of the connection port. The power supply VCC in the connection port 601 supplies power to the aforementioned switch control loop 501, the control signal CTR is connected to the control signal input terminal of the drive circuit of the switch control loop 501, and the live wire UL and the neutral wire UN of the power supply are provided to the load loop for the load Z to connect to generate an additional load.

[0068] For the various components and connection structures of the communication module 60 of the present invention, as well as the specific structures of the switch control circuit 501 and the load circuit 502, please refer to the various specific implementation methods of the topology structure measuring device 50 of the present invention, which will not be repeated here.

[0069] Finally, it should be noted that the above specific embodiments of the present invention are only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.

Claims

1. A system having a power topology measurement device, comprising: concentrator, more than one metering device; The concentrator and the metering device are connected to each other in a tree structure, and the concentrator is arranged at the top of the tree structure; The central control unit of the concentrator is communicatively connected to the meter reading unit, and the central control unit and the meter reading unit are communicatively connected to the topology detection unit respectively; The metering device includes an electric energy metering circuit and a communication module that are connected to each other for communication; the communication module includes a control unit, a load power supply and a working power supply; the communication module also includes a switch control circuit and a load circuit; wherein, The switch control circuit includes: a drive circuit for controlling the on and off of the load switch, the drive circuit is provided with a control signal input terminal; the working power supply is connected to the switch control circuit power supply; the control unit is connected to the control signal input terminal; The load circuit is composed of a load unit and a load switch connected in series and connected to a load power supply; The load unit comprises: a composite impedance circuit formed by resistors, capacitors and inductors connected in series and / or in parallel.

2. The system according to claim 1, characterized in that The load switch includes: a relay and / or a transistor; and / or the drive circuit includes: a relay drive circuit and / or a semiconductor drive circuit.

3. The system according to claim 1, characterized in that: The control unit is also connected to a data cache unit.

4. The system according to claim 1, characterized in that: The topology detection unit is provided with a switching circuit for closing the communication between the central control unit and the meter reading unit according to the instruction issued by the central control unit.

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