CN219936300U

CN219936300U - Power grid simulator and node connection circuit thereof

Info

Publication number: CN219936300U
Application number: CN202320082076.8U
Authority: CN
Inventors: 孙伟; 孟祥志
Original assignee: Sungrow Shanghai Co Ltd
Current assignee: Sungrow Shanghai Co Ltd
Priority date: 2023-01-11
Filing date: 2023-01-11
Publication date: 2023-10-31
Anticipated expiration: 2033-01-11

Abstract

The utility model discloses a power grid simulator and a node connection circuit thereof. The power grid simulator comprises at least two detachable boxes; the node connection circuit includes: at least two controllers respectively arranged in different detachable boxes; the controllers are in communication connection through a communication bus; the controller is divided into a master controller and a slave controller; the slave controller is used for generating operation information according to the operation state of the equipment in the detachable box body; the main controller is used for summarizing the operation information. The main controller of the embodiment of the utility model does not need more IO interfaces, the connection line between the detachable boxes is simple, the wire demand is less, the use cost is low, the disassembly and the assembly are convenient, and the movement and the independent test of the detachable boxes are facilitated; and can realize multiple combination between the removable box, adapt to multiple scene.

Description

Power grid simulator and node connection circuit thereof

Technical Field

The utility model relates to the technical field of power grid simulators, in particular to a power grid simulator and a node connection circuit thereof.

Background

The grid simulator is capable of simulating the output characteristics of a real grid, and is typically used to simulate the steady state and transient performance of the grid. The power grid simulator is often formed by combining detachable boxes such as a plurality of containers, the controller is only provided with one box, the functions in each container are complex, the power equipment is various, and each power equipment needs to be connected with the controller so as to monitor the power equipment.

Based on the above, in the prior art, the connection lines among the containers of the power grid simulator are numerous, the requirements on wires and the IO interface of the controller are large, the use cost is high, and the disassembly and assembly are complex, so that the movement and the independent test of the box body are inconvenient; and the plurality of connecting lines among the containers enable the combination mode among the containers to be single, and the method is suitable for a small number of scenes.

Disclosure of Invention

The utility model provides a power grid simulator and a node connection circuit thereof, which are used for solving the problems that the power grid simulator has various connecting lines among containers, the wire demand and the IO interface demand of a controller are large, the use cost is high, the disassembly and the assembly are complex, and the movement and the independent test of a box body are inconvenient; the combination mode among the containers is single, and the method is suitable for the problem of few scenes.

According to an aspect of the present utility model, there is provided a node connection circuit of a grid simulator, the grid simulator comprising at least two removable boxes; the node connection circuit includes:

at least two controllers respectively arranged in different detachable boxes; the controllers are in communication connection through a communication bus; the controller is divided into a master controller and a slave controller; the slave controller is used for generating operation information according to the operation state of the equipment in the detachable box body; the main controller is used for summarizing the operation information.

Optionally, the controller includes: a first communication interface and a functional interface;

the first communication interface is used for connecting other controllers; the function interface is used for connecting the simulation function module in the power grid simulator.

Optionally, the first communication interface includes at least one of a CAN communication interface and a Modbus communication interface;

and/or, the functional interface comprises: at least one of a serial communication interface, a digital IO interface, an analog IO interface, a temperature sensor interface, and a humidity sensor interface.

Optionally, the hardware of the at least two controllers is identical.

Optionally, the controller includes: at least one of ARM module, DSP module and singlechip module.

Optionally, at least one slave controller is disposed in each of the removable boxes.

Optionally, the slave controllers are divided into a first class of slave controllers and a second class of slave controllers; the first type slave controllers are connected with the master controller through a communication bus; the second type slave controllers are connected with the master controller through the first type slave controllers; the first type slave controllers are used as relay controllers of the second type slave controllers; wherein in a spatial position, the first type of slave controller is located between the master controller and the second type of slave controller.

Optionally, the slave controller has an identification number, and the master controller identifies the slave controller according to the identification number, so as to identify the corresponding detachable box.

Optionally, the analog functional module includes: the high-voltage switch module, the input step-down transformer module, the low-voltage switch module, the multi-winding transformer module, the power unit module, the output transformer module, the high-voltage switch microcomputer protection unit module, the circuit breaker module, the three-station switch module and the sensor unit module.

According to another aspect of the present utility model, there is provided a grid simulator comprising: at least two removable boxes; the at least two detachable boxes employ the node connection circuit described in any of the above embodiments.

The node connection circuit of the power grid simulator provided by the embodiment of the utility model adopts a hierarchical control structure, the slave controller is additionally arranged in the detachable box body, and the slave controller is in communication connection with the master controller, namely, all the nodes can be interconnected. The slave controllers collect and gather the operation state data of the power equipment in the detachable box body and generate operation state information, then the operation state information is sent to the master controller through the communication bus, and the master controller gathers the operation state information sent by each slave controller and generates complete operation state information. Compared with the prior art, the detachable box body is only connected with the communication bus, and a plurality of power lines are not required to be arranged. And the main controller only needs to be provided with a communication interface, and does not need more IO interfaces. In summary, the node connection circuit provided by the utility model has the advantages of simple connection between the detachable boxes, less wire demand, low use cost, convenient disassembly and assembly, and convenience for the movement and independent test of the detachable boxes; and can realize multiple combination between the removable box, adapt to multiple scene.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the utility model or to delineate the scope of the utility model. Other features of the present utility model will become apparent from the description that follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a node connection circuit of a power grid simulator according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a node connection circuit of another grid simulator according to an embodiment of the utility model;

FIG. 3 is a schematic diagram of a controller according to an embodiment of the present utility model;

fig. 4 is a schematic diagram of a node connection circuit of a power grid simulator according to another embodiment of the present utility model.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The embodiment of the utility model provides a node connection circuit of a power grid simulator, which is suitable for the power grid simulator comprising at least two detachable boxes. Fig. 1 is a schematic diagram of a node connection circuit of a power grid simulator according to an embodiment of the present utility model. Referring to fig. 1, the node connection circuit includes:

at least two controllers 100 respectively disposed in different detachable cases 400; the controllers 100 are in communication connection through a communication bus; the controller 100 is divided into a master controller 110 and a slave controller 120; the slave controller 120 is used for generating operation information according to the operation state of the equipment in the detachable case 400; the main controller 110 is used to aggregate the operational information.

Wherein, the detachable box 400 is a box capable of being detached, and the detachable box is at least that the connecting wires between the boxes can be detached; further, the equipment components of the box body can be detached and assembled. Various electric devices can be accommodated in the detachable case 400, and the detachable case 400 may be, for example, a container. The power grid is an integral body formed by power transformation stations and power transmission and distribution lines of various voltages in a power system, the power grid comprises three parts of power transformation, power transmission and power distribution, and each part of the power grid comprises a plurality of power equipment. Therefore, when the power grid is simulated, the power equipment in the power grid simulator is mostly arranged in a plurality of detachable boxes 400, each detachable box 400 is a part of the power grid simulator, and the plurality of detachable boxes 400 form a complete power grid simulator.

Each controller 100 may be considered a circuit node, with master controller 110 being the master node and slave controller 120 being the slave node. The controller 100 can realize functions of collecting, calculating, communicating and the like of operation parameters of the power equipment. The utility model is not limited to the type of controller 100, and optionally, controller 100 includes: at least one of ARM module, DSP module and singlechip module. Illustratively, one master controller 110 and a plurality of slave controllers 120 are provided in the grid simulator, and the number of slave controllers 120 is identical to the number of removable boxes 400 in the grid simulator. Optionally, a main control device 200 may be further disposed in the power grid simulator, the main control device 200 may be used for external interaction of the power grid simulator, and the main controller 110 and the main control device 200 may be disposed in any one of the detachable boxes 400. The power equipment in each removable box 400 is connected to the slave controller 120 in the removable box 400, and the operation state data of the power equipment is uploaded to the slave controller 120.

Communication buses are provided between the detachable boxes 400, and the slave controller 120 in each detachable box 400 communicates through the communication buses provided between the detachable boxes 400. Therefore, the embodiment of the utility model does not need to provide complex connecting wires between the detachable boxes 400, and simplifies the connecting mode between the detachable boxes 400.

The node connection circuit is illustratively operated by summarizing the operation status data of the electrical devices in the detachable case 400 from the controller 120 and generating operation information. However, the power plant operating information at this time is incomplete with respect to the overall grid simulator. The slave controller 120 transmits the operation information to the master controller 110 through a communication bus. The main controller 110 receives the operation information transmitted from the controller 120 and generates complete operation state information in a summary manner, and may transmit the complete operation state information to the main control device 200.

The node connection circuit of the power grid simulator provided by the embodiment of the utility model adopts a hierarchical control structure, the slave controller 120 is additionally arranged in the detachable box 400, and the slave controller 120 is in communication connection with the master controller 110, namely, all the nodes can be interconnected. The slave controllers 120 collect and collect the operation state data of the power equipment in the detachable case 400 and generate operation state information, and then the operation state information is transmitted to the master controller 110 through the communication bus, and the master controller 110 collects and generates complete operation state information of the operation state information transmitted from each slave controller 120. Compared with the prior art, only a communication bus is connected between the detachable boxes 400 in the embodiment of the utility model, and a plurality of power lines are not required to be arranged. And, the main controller 110 only needs to be provided with a communication interface, and does not need more IO interfaces. In summary, the node connection circuit provided by the utility model has the advantages of simple connection between the detachable boxes 400, less wire demand, low use cost, convenient disassembly and assembly, and convenience for the movement and independent test of the detachable boxes 400; and various combinations can be realized among the detachable boxes 400, so that the detachable boxes are suitable for various scenes.

Fig. 2 is a schematic diagram of a node connection circuit of another power grid simulator according to an embodiment of the present utility model. Fig. 3 is a schematic structural diagram of a controller according to an embodiment of the present utility model. Optionally, in combination with fig. 2 and 3, the controller 100 may optionally include: a communication interface and a functional interface; the communication interface is used for connecting other controllers 100; the functional interface is used to connect the analog functional module 300 in the grid simulator.

Optionally, the communication interface includes at least one of a CAN communication interface and a Modbus communication interface; and/or, the functional interface comprises: at least one of a serial communication interface, a digital IO interface, an analog IO interface, a temperature sensor interface, and a humidity sensor interface.

Specifically, the CAN communication interface is configured to receive CAN communication messages, where CAN communication includes serial data communication with integrity, provides real-time support, has a high transmission rate, and has 11-bit addressing and error detection capabilities. The Modbus communication interface is used for realizing a Modbus communication protocol, and the Modbus protocol is a serial communication protocol and is a common connection mode between industrial electronic devices at present. Each functional interface is used for connecting power equipment and a sensor. Illustratively, table 1 gives the classification of the partial function interfaces and the signals accessed.

TABLE 1

The setting mode of the functional interfaces can be set according to the type and the number of the analog functional modules 300, and the analog functional modules 300 are composed of power equipment, such as a high-voltage switch microcomputer protection module, a step-down transformer temperature controller, a high-voltage circuit breaker, a three-station switch and a circuit breaker. In addition, the analog functional module 300 is further provided with sensors such as a temperature sensor, a humidity sensor, a smoke sensor, a door position sensor, a step-down transformer temperature sensor, a high-voltage belt sensor, a transformer heat radiation fan, a heater, and a box body external belt warning lamp; and the slave controller 120 also receives alarm information of the high voltage switchgear and fault information of the high voltage switchgear through the functional interface. Specifically, as can be seen from table 1, the serial communication interface can be used for accessing the signal of the high-voltage switch crisis protection module and the signal of the step-down transformer temperature controller; the temperature sensor interface is used for accessing signals of the temperature sensor; the humidity sensor interface is used for accessing signals of the humidity sensor; the digital IO interface (DI) is used for accessing a smoke sensor signal, a door position sensor signal, a step-down transformer temperature sensor signal, a high-voltage circuit breaker signal, a three-station switch signal, alarm information of a high-voltage switch cabinet, fault information of the high-voltage switch cabinet and an emergency stop signal; the digital IO interface (DO) is used for outputting a breaker closing signal, a breaker opening signal, a three-position switch closing signal, a three-position switch breaking signal, a three-position switch grounding signal, a transformer cooling fan starting and stopping signal, a heater starting signal and a box body external electrified alarm lamp signal.

Based on the above embodiments, the controller 100 is optionally provided with at least two communication interfaces. The advantage of this is that when the grid simulator has a plurality of controllers 100, two communication interfaces of the controllers 100 can be connected to different controllers 100, respectively, so as to interconnect the controllers 100. The communication interfaces of the controller 100 can perform bidirectional communication, and the arrangement of a plurality of communication interfaces of the controller 100 is beneficial to the external expansion of the power grid simulator. For example, when the grid simulator needs to additionally add the removable box 400, the controller 100 in the removable box 400 can be connected between any two controllers 100.

Optionally, on the basis of the above embodiment, hardware of at least two controllers is identical. Specifically, each controller 100 is differentiated only in the setting position at the time of actual application, and is configured to realize different functions by performing functional configuration. It will be appreciated that in some cases, master controller 110 and slave controller 120 may be interchanged. In other cases, the connection relationship between different slave controllers 120 may vary depending on the applicable scenario. For example, in one scenario, a first type of slave controller is directly connected to the master controller 110; the second type slave controller is connected to the master controller 110 through the first type slave controller. In another scenario, only the master controller 110 and the first type of slave controllers are provided, i.e. the slave controller 120 is directly connected to the master controller 110. The arrangement of the embodiment reduces the application cost of the node connection circuit of the power grid simulator, and is beneficial to being suitable for various application scenes.

Fig. 4 is a schematic diagram of a node connection circuit of a power grid simulator according to another embodiment of the present utility model. Alternatively, on the basis of the above embodiment, referring to fig. 4, the analog functional module 300 includes: the high-voltage switch module, the input step-down transformer module, the low-voltage switch module, the multi-winding transformer module, the power unit module, the output transformer module, the high-voltage switch microcomputer protection unit module, the circuit breaker module, the three-station switch module and the sensor unit module.

Alternatively, on the basis of the above-described embodiment, with continued reference to fig. 4, the slave controller 120 is divided into a first-type slave controller 121 and a second-type slave controller 122; the first type slave controller 121 is connected with the master controller 110 through a communication bus; the second type slave controller 122 is connected to the master controller 110 through the first type slave controller 121; the first-type slave controller 121 serves as a relay controller of the second-type slave controller 122; wherein in a spatial position, a first type of slave controller 121 is located between the master controller 110 and a second type of slave controller 122.

With continued reference to fig. 4, specifically, the grid simulator is provided with three removable boxes 400, and a high-voltage switch and an input step-down transformer module are provided in the 1# removable box 400, wherein the high-voltage switch and the input step-down transformer module are both connected with a second type of slave controller 122 (connection line not shown) provided in the 1# removable box 400; the main controller 110, the main control device 200, the low-voltage switch module, the multi-winding transformer module and the power unit module are arranged in the 2# detachable box 400, wherein the low-voltage switch module, the multi-winding transformer module and the power unit module are connected with the first type of slave controllers 121 (connection wiring diagrams are not shown) arranged in the 2# detachable box 400; an output transformer module is provided in the 3# detachable case 400, wherein the output transformer module is connected to the first type slave controller 121 (connection line not shown) provided in the 3# detachable case 400. In addition, the slave controllers 120 disposed in the respective detachable cases 400 are connected to the master controller 110 by direct or indirect means, wherein the second-type slave controllers 122 disposed in the # 1 detachable case 400 are connected to the master controller 110 through the first-type slave controllers 121 disposed in the # 2 detachable case 400, and the first-type slave controllers 121 disposed in the # 2 detachable case 400 and the first-type slave controllers 121 disposed in the # 3 detachable case 400 are directly connected to the master controller 110. Note that, the expressions of # 1, # 2, and # 3 for the removable case 400 in this embodiment are only used to distinguish different removable cases 400.

Alternatively, on the basis of the above embodiment, the slave controller 120 has an identification number, and the master controller 110 recognizes the slave controller 120 according to the identification number, thereby recognizing the corresponding detachable case 400.

In the above embodiment, a detachable case 400 is exemplarily shown with a slave controller 120 disposed therein, which is not a limitation of the present utility model. In other embodiments, two or more slave controllers 120 may be provided within the removable housing 400. It can be appreciated that when there are more analog functional modules 300 in the detachable case 400 or more power devices in the analog functional modules 300, the demand for the functional interfaces of the slave controllers 120 is greater, and at this time, a plurality of slave controllers 120 are disposed in the detachable case 400 to satisfy the use demands of the analog functional modules 300. When a plurality of slave controllers 120 are provided in the detachable case 400, the plurality of slave controllers 120 in the detachable case 400 are also connected by a communication bus.

The embodiment of the utility model also provides a power grid simulator, which comprises: at least two removable boxes; the node connection circuit provided by any embodiment is adopted by at least two detachable boxes, and the technical principle and the produced effect are similar and are not repeated.

It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present utility model may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present utility model are achieved, and the present utility model is not limited herein.

The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.

Claims

1. A node connection circuit of a power grid simulator, wherein the power grid simulator comprises at least two detachable boxes; the node connection circuit includes:

2. The grid simulator node connection circuit of claim 1, wherein the controller comprises: a first communication interface and a functional interface;

3. The node connection circuit of the grid simulator of claim 2, wherein the first communication interface comprises at least one of a CAN communication interface and a Modbus communication interface;

4. The grid simulator node connection circuit of claim 1, wherein the hardware of the at least two controllers is identical.

5. The grid simulator node connection circuit of claim 1, wherein the controller comprises: at least one of ARM module, DSP module and singlechip module.

6. The grid simulator node connection circuit of claim 1, wherein at least one of the slave controllers is disposed within each of the removable boxes.

7. The node connection circuit of a grid simulator according to claim 6, wherein the slave controllers are divided into a first class of slave controllers and a second class of slave controllers; the first type slave controllers are connected with the master controller through a communication bus; the second type slave controllers are connected with the master controller through the first type slave controllers; the first type slave controllers are used as relay controllers of the second type slave controllers; wherein in a spatial position, the first type of slave controller is located between the master controller and the second type of slave controller.

8. The grid simulator node connection circuit of claim 6, wherein the slave controllers have identification numbers, and the master controller identifies the slave controllers based on the identification numbers, thereby identifying the corresponding removable boxes.

9. The node connection circuit of a grid simulator according to claim 2, wherein the simulation functional module comprises: the high-voltage switch module, the input step-down transformer module, the low-voltage switch module, the multi-winding transformer module, the power unit module, the output transformer module, the high-voltage switch microcomputer protection unit module, the circuit breaker module, the three-station switch module and the sensor unit module.

10. A grid simulator, comprising: at least two removable boxes; the at least two removable boxes employ a node connection circuit as claimed in any one of claims 1 to 9.