WO2012151720A1

WO2012151720A1 - Plug and play smart grid experiment and training system based on grid architecture

Info

Publication number: WO2012151720A1
Application number: PCT/CN2011/000890
Authority: WO
Inventors: 赵义术; 战杰; 马梦朝; 张彦; 姜亚伟; 韩丽辉; 李晓蕾
Original assignee: 国网技术学院
Priority date: 2011-05-10
Filing date: 2011-05-24
Publication date: 2012-11-15

Abstract

The present invention relates to a plug and play smart grid experiment and training system based on grid architecture. The system includes multiple unit cabinets, and all the unit cabinets compose an m*n array, wherein, m and n are integers. Each unit cabinet is set to have a linear system module, a quadratic measurement and control module, and a communication module; the linear system module is set to have a linear electrical interface by which the unit cabinet is connected with the adjacent unit cabinets and the quadratic measurement and control module; the quadratic measurement and control module is used to measure each circuitry current and bus voltage in the linear system module, control the circuit breaker, transform the current and voltage of the linear system module to the quadratic current and voltage consistent with the actual system, and send the transformed current and voltage to the monitoring center; the communication module is used to implement the real time communication between any two of the monitoring center, unit cabinets, and other linear or quadratic devices by different communication channels, and access the communication network of the system by the standard communication interface of the unit cabinet communication module, thus implementing the communication functions with each unit cabinet, and the monitoring center.

Description

Plug-and-play smart grid experimental training system based on grid architecture

The invention relates to a plug-and-play smart grid experimental training system based on grid architecture.

Background technique

The power system physical simulation system is a physical model based on the principle of similarity and having the same physical properties as the prototype power system. It is mainly composed of analog generators, analog transformers, analog transmission and distribution lines, simulated loads, and related adjustments, controls, and measurements. , protection and other analog devices. The power system physical simulation system has the following characteristics:

1. It is possible to directly observe all the physical processes generated by the research subject in the power system on the model, obtain clear physical concepts, and conveniently conduct qualitative research on the characteristics and processes of the power system.

2. For problems that cannot or cannot be well described by mathematical equations, you can easily use physical simulation to explore the physical nature of the problem, and also verify the rationality and correctness of existing theories and teaching simulations. Theoretical and mathematical models are more complete.

3. For some new types of relay protection and automatic devices, you can directly access the physical simulation system to study. For example, the new relay protection can be connected to a physical simulation system to perform various short-circuit fault tests to evaluate various performances of the protection device.

At present, the types and quantities of equipment in the power system physical simulation system are numerous, subject to site constraints, the network structure is relatively simple, and the adjustment range of structure and parameters is limited. For a more complex prototype power system, some simplification is generally required to carry out physical simulation experiments. With the continuous development of modern power technology, the construction of smart grids is gradually deepening, the requirements of intelligent systems for intelligent operation and control technology are getting higher and higher, the scale of power systems is expanding, the voltage level is gradually increasing, and new technologies and equipment are more Rich, network structure, operation mode and increasingly complex, existing physical simulation technologies and systems can no longer meet the growing simulation needs of modern power systems.

Summary of the invention

In order to overcome the deficiencies of the existing power system physical simulation system, which is difficult to meet the increasingly high simulation requirements of modern power systems, the present invention proposes a plug-and-play smart grid experimental training system based on a grid architecture. The training system is based on the existing physical simulation technology of the power system. The system adopts standardized and modular design components, plug and play, flexible networking and convenient expansion. It is equipped with monitoring center with monitoring, protection, control and management functions. It can easily change the network topology, operation mode and component parameters according to different needs, and provide a platform for physical simulation of distributed generation, microgrid, new energy generation and grid and smart grid. It can carry out various power network structures and parameters. The smart grid physics simulation meets the requirements of conducting technical, skill training and scientific research experiments.

To achieve the above object, the present invention adopts the following technical solutions:

A plug-and-play smart grid experimental training system based on grid architecture, comprising a plurality of unit cabinets, each unit cabinet forming a mX n array, wherein m and n are integers;

Each unit cabinet is provided with a primary system module, a secondary measurement and control module and a communication module;

The unit cabinet is provided with one electrical interface and a secondary electrical interface; the unit cabinet is connected to the adjacent unit cabinet through one electrical interface; 'the primary system module in the unit cabinet is connected to the secondary measurement and control module through the terminal' sub-row, and the primary system module is also A grid analog component module is provided to simulate the power system of different system voltage levels and different line lengths by changing the type and parameters of the grid analog components;

The secondary measurement and control module completes the measurement of each line current and bus voltage in the primary system module and the control of the circuit breaker, and converts the voltage and current of the primary system module into secondary voltage and current backward monitoring consistent with the actual system. Center transmission, under the unified control of the monitoring center, complete fault detection and isolation, island detection and operation control, and new energy generation grid-connected control; communication module, realize monitoring center, unit cabinet and other primary and secondary equipment through different communication channels Real-time communication, all unit cabinet communication modules in the system are connected with the communication equipment of the monitoring center, and the group costs the communication network of the physical simulation system, and all the external devices connected to the primary electrical interface of the unit cabinet and the secondary electrical interface. All of them are connected to the communication network of the system through the standard communication interface of the communication unit of the unit cabinet, thereby realizing communication with each unit cabinet and the monitoring center; the monitoring center is mainly composed of workstations and/or servers, and completes management of the entire system. Confirmation The unit cabinet is provided with a J-type shielding layer, wherein the communication module is disposed at the top of the unit cabinet and is also located at the upper part of the J-type shielding layer, and the secondary measurement and control module is disposed on the back side of the unit cabinet and also located on the left side of the J-type shielding layer, thereby Realize one system module, the second measurement and control module and the communication module are isolated; one system module is arranged on the front side of the unit cabinet, and the system module is provided at the bottom of the front part: ^Ψ"Electrical-net model lH-module-block two The system is connected to the analog ffi and the middle 3⁄4 line. In the second-order system, the 3⁄4⁄4 king 7-th system module and the grid analog component module are located on the right side and the bottom of the J-type shield, but the two are connected to the secondary measurement and control module. The J-shield is separated.

The primary system module further includes a neutral line, and the neutral line is divided into a neutral line I section and a neutral line section, and the two ends of the neutral line are respectively connected with the neutral line of the primary electrical interface. ;

An analog ground wire, the two ends of which are respectively connected with the ground wire of the primary electrical interface;

The neutral line I and the neutral line segment and the analog ground line are respectively connected to the neutral line interface and the analog ground line interface of the unit cabinet, and through different connections between the neutral line interface and the analog ground line interface, Achieve a variety of power system neutral point operation mode; busbar module, it is a three-way busbar in the form of single busbar or double busbar, three-phase busbar and voltage transformer primary loop connection, voltage transformer secondary loop through terminal block and two Secondary measurement and control module connection;

At the same time, the busbar module is also connected with k analog lines; the k-2 analog lines are connected to the primary electrical interface through the current transformer and the circuit breaker, and the secondary side of the current transformer and the circuit breaker control loop pass through the terminal block and The second measurement and control module is connected; the remaining two analog lines are also connected with the corresponding current transformers and circuit breakers, and respectively connected to the two ends of the power grid analog component module, wherein the current transformer secondary circuit and the circuit breaker control circuit also pass through the terminal block and The second measurement and control module is connected; one end of the power grid analog component module is connected to the primary electrical interface through a corresponding circuit breaker, and the circuit breaker control loop is connected to the secondary measurement and control module through the terminal block;

The neutral point of the grid analog component module is connected to the neutral line of the primary system module, and the ground wire is terminated to the analog ground of the primary system module.

The grid analog component modules are mainly analog lines or transformers, which are mounted on standardized trolleys and use analog lines of the κ-type centralized parameter model.

The secondary measurement and control module includes a plurality of measurement and control devices and a display panel; the display panel is disposed at the top of the unit cabinet, and the display panel receives and displays information sent by the monitoring center.

The monitoring center is provided with a GPS clock timing device.

The overall structure of the invention adopts a grid structure, which can be composed of mX n (m and n are integer) unit cabinets and a monitoring center, and can be flexibly expanded. The spatial position of each unit cabinet and its interconnection relationship are as shown in FIG. 1 . m and n are constrained by the system design scale and installation site. The smallest system can be constructed by one unit cabinet and one (set) monitoring center.

Each unit cabinet in the system adopts a unified standard and structure, as shown in Figure 2a, Figure 2b, Figure 2c, Figure 2d, and Figure 2e. The unit cabinet is equipped with a standard primary electrical interface, a secondary electrical interface, and multiple communication interfaces. The analog ground interface and the neutral line interface can be easily expanded and connected, and the unit cabinet can be plug and play. Wherein, the primary electrical interface is used for the connection of the unit cabinet, the power supply, the load, and other equipment on the primary side of the power grid (such as SVC, short-circuit fault generating device, etc.); the secondary electrical interface is used to expand the locally installed secondary equipment in the unit cabinet (eg Power quality monitoring, localized protection devices, etc., which need to be installed on the secondary circuit.) Communication interface is used for monitoring center, unit cabinet, power supply, load, other equipment on the primary side of the power grid, and secondary equipment installed locally. The interconnection between the control of the system and the communication system of the controlled device communicates with each other, and the communication mode and communication time satisfy the real-time measurement and control requirements of the system.

The shape and size of the unit cabinet can be adjusted according to different system design scales and installation site sizes. When installing the unit cabinet, it should be connected with the grounding wire of the installation site to ensure personal safety. As shown in Figure 2a-e2e, a single unit cabinet consists of a primary system module, a secondary measurement and control module, and a communication module. Effective shielding measures are designed between the modules to avoid electromagnetic interference between each other. among them,

The primary system module consists of busbar modules (including busbars, corresponding lines, circuit breakers and their current transformers), grid analog component modules (power grid analog components that can be flexibly replaced on standardized trolleys, as shown in Figure 3: π-type concentration The analog circuit of the parametric model can realize the power system simulation of different system voltage levels and different line lengths through the change of component parameters to meet different experimental requirements), the standardized primary electrical interface, and one segment connected by the circuit breaker. Neutral Line and analog ground line; specific bus form (such as single bus, double bus, etc.), type of grid analog components and standardized primary electrical interface form can be determined by specific system design requirements; bus through circuit breaker and grid analog components or primary electrical The interfaces are connected; in order to realize the grid-like networking, the two ends of the grid analog component module are connected to the mother through the circuit breaker ^

- The circuit breaker is connected to - one time - electrical interface ^ neutral point is connected to the primary system module neutral line r ground line is terminated to the n system module analog ground line; a two-segment neutral line connected by the circuit breaker, analog ground The wires are respectively connected to the neutral line interface and the analog ground line interface on the side of the unit cabinet, and different power system neutral point operation modes can be realized through different connections between the neutral line interface and the analog ground line interface;

The secondary measurement and control module consists of a measurement and control device, a standardized secondary electrical interface, and a display panel. This layer completes the measurement (with a high sampling rate, high-precision measurement and installation. The measurement includes bus voltage and output current). , state quantity of each circuit breaker, etc.) and control execution (circuit breaker operation, component parameter adjustment) function, and convert the voltage and current of the analog system into secondary voltage and current consistent with the actual system, and then to the main control device (monitoring Center) Transmission, providing input signals for protection, measurement, and control units, enabling fault detection and isolation, island detection and operation control, new energy generation grid-connected control, and other control functions under unified control of the master equipment (monitoring center) The measurement and control device adopts the modular, integrated and multi-functional form (such as Shandong Luneng Intelligent Technology Co., Ltd. LCS-602 measurement and control device), which can install a corresponding number of measurement and control devices according to the quantity measurement and control quantity; Display information sent by the master device (monitoring center) (such as when Pre-electricity price, predicted electricity price in the future, each bus voltage, branch power, fault, alarm, etc.); The secondary electrical interface includes a voltage loop interface connected in parallel to the voltage measurement secondary circuit, and a current loop interface connected in series to the secondary loop of the current measurement. , and the circuit breaker trip circuit, can be connected to the secondary side accessory equipment that needs to be installed locally (unit cabinet).

The communication module is composed of a plurality of (sets) communication devices (such as a fiber-optic Ethernet switch) and a communication interface, and can be adapted to realize real-time communication between the main control device (monitoring center), the unit cabinet, and other secondary devices through different communication channels. The need, all the unit cabinet communication module equipment in the system and the main control equipment (monitoring center) communication equipment are connected through the communication channel, the group costs the physical simulation system communication network, and the primary electrical interface and the secondary electrical interface are connected to the unit cabinet. All external devices on the device can access the communication network of the system through the standard communication interface of the unit cabinet communication module device, thereby realizing real-time communication functions with each unit cabinet, main control and other devices.

The monitoring center consists of workstations, servers and other equipment as well as the integrated monitoring and management software platform. The specific technical solutions are as follows:

The GPS clock timing device and corresponding functions are configured to synchronize the monitoring center time with the GPS time. Under the high reliability requirements of the system, the communication network can be composed of multiple (multi-channel) communication systems, and communication systems of different types or different paths are mutually Independent, simultaneous work, mutual standby, and real-time communication with each device in the network; In the case of low system reliability requirements, the communication network can only use one type of real-time communication to meet the devices in the network. ^ The composition of the communication method.

Graphical integrated monitoring and management software platform adopts object-oriented technology and modular technology design and development. The system is open, easy to expand and maintain the system, friendly interface, easy for human-computer interaction; for various devices in the system, in the monitoring system Each of them defines its corresponding class (including attributes and operations); any device in the physical simulation system exists in the form of the object of the corresponding class in the monitoring center software. Each unit cabinet and other equipment becomes a specific object with specific attributes and operations.

In order to realize the fast switching of the smart grid operation mode under different operation modes, the graphic model integrated monitoring and management software platform adopts the file management mode of the operation mode and the integrated mode. As shown in Fig. 3c, the setting process mainly has three steps: , to create a graphical file containing the experimental object, to configure the object properties; the second step, configure the experimental system relay protection function, and add other method modules related to the purpose of the experiment (including but not limited to electricity price management, intelligent power management, Historical roadshow, frequency control, economic dispatch, reactive power regulation control, islanding detection, grid-connected control, standby self-injection control, smart grid black start, self-healing control, online real-time analysis), configuration of master control equipment (monitoring center) to unit The information pushed by the cabinet display; The third step is to perform the "operation mode setting" operation, and the system automatically performs the safety check. After the safety check is successful, it will be configured according to the first step to automatically operate the circuit breaker and establish the corresponding network. Structure, complete the corresponding method settings, and implement changes according to the topology Dynamically generate a system wiring diagram. Among them, the configuration map created in the first step and the second step can be saved as a file, which can be loaded and used in the next experiment.

For example, a physical simulation system consisting of 32 unit cabinets, in which only 6 unit cabinets are used in a certain operation mode, and Fixed connection relationship, in the integrated mode of file management, the first step, you can create a graphical file corresponding to the operation mode, and add the required 6 unit cabinet objects and their access in the file. For other power supply, load and other objects, establish a corresponding system connection diagram according to the primary side connection mode of the smart grid, and use the "enable setting" to shield the target unit cabinet.

- The measurement and control list used by Zhongzhu - Yuan H - (----------------------------------------------------------------------------------------------------------------------------------------- The telemetry, remote signaling, remote control, and remote adjustment information transmission are not related to the purpose of the experiment, and the communication mode and alarm signal of the corresponding unit cabinet are set; the second step is to configure the experimental system relay protection function after the setting of each object attribute is completed. And add other method modules related to the purpose of the test (such as self-healing control); The third step is to perform the "run mode setting" operation, after the software platform system security verification is successful, under the software platform remote control, the physical simulation system will automatically Establish a network structure corresponding to the file settings, and generate a corresponding system wiring diagram, which can display all kinds of telemetry and remote signaling information of interest during the experiment. If the "Enable Setting" is not performed in the first step, the unit cabinet will transmit all telemetry and remote signaling by default (the status of each circuit breaker', the voltage of the bus, the current flowing through the line, and its active and reactive power. , electricity consumption, power generation, etc.), the graphic integrated monitoring and management software platform can store, query, display, print and output the above data, and can output in charts and texts, can store the past period of time ( For example, 1 year) of running data, and rolling updates in real time.

For different research needs or experimental purposes, the graphical integrated file management has a unit cabinet grouping function, which manages views by region (or by function, or by device membership). In the system consisting of six unit cabinets as described above, two unit cabinets are connected together to form a sub-view system management, or to facilitate the completion of a certain function in which all power generating units are assigned to the same sub-view system management.

The graphical integrated monitoring and management software platform has user management functions, including adding and deleting software system users, password settings, modifications, login and operation history records and viewing (prohibition of modification).

The graphical integrated monitoring and management software platform has historical roadshow and offline analysis functions, that is, the functions of offline playback and various offline analysis of the experimental process using various types of data stored in the experimental process.

The present invention has the following advantages and positive effects:

The system design adopts modular, integrated and object-oriented technology, which realizes plug-and-play, flexible networking and various operation modes. The customization and modification of the network topology are realized by the monitoring center software, which is convenient and flexible, and supports system expansion. According to the requirements of the simulated system, the required unit cabinet, power supply, load and other power system components can be selected and connected, and the connection of the above components can be conveniently realized to form a smart grid simulation system that meets the needs; DC line, DC load, etc., only need to replace the model in the unit cabinet with the DC system model, replace the DC circuit breaker with the AC circuit breaker, and replace the measurement and control equipment with the DC measurement and control equipment;

The physical simulation of various voltage level AC power system networks is conveniently implemented using a low voltage network;

Each unit cabinet contains multiple components and equipment such as power system components or component equivalent models (such as lines), transformers, circuit breakers, bus bars, measurement and control units, and communication units. The parameters of the equipment/model can be adjusted within a certain range. Or directly replace the equipment/model, which can flexibly match the parameters of the transmission and distribution lines, and directly access the components and equipment with larger volume through one electrical interface;

The external fault setting circuit can realize the simulation of single-phase short circuit, two-phase short circuit, two-phase ground short circuit and three-circuit short-circuit short-circuit fault in each unit. The short-circuit fault realization system can choose whether the fault occurs through the resistor. The overall protection of the entire system configuration is realized by the protection workstation of the monitoring center. Each unit cabinet can be optionally equipped with a local protection system, and the protection setting can be modified by the remote monitoring center;

Each unit cabinet can be equipped with multiple communication modes, which can realize real-time communication between monitoring centers, unit cabinets and other access devices, which are mutually standby and have high reliability;

The networked new energy can be reliably supplied to local loads (such as a home, or a community), and is convenient and reliable. For example, the minimum system size can be achieved with a single unit cabinet, enabling new energy generation and intelligent power management within a home. It can be concluded that the market demand of the system is broad, and it is easy to realize the industrialization promotion and application;

The system provides hardware and software platforms for the development of advanced applications of smart grids, device testing and trial production, technical skills training, and competition. . DRAWINGS

Fig.1 Schematic diagram of the plug-and-play smart grid experimental training system based on grid architecture

Figure 2a is a front cross-sectional view of the unit cabinet;

Figure 2b Rear view of the unit cabinet 7

Figure 2c Left cabinet view of the unit cabinet;

Figure 2d right side view of the unit cabinet;

Figure 2e is a cross-sectional view of the right side of the unit cabinet;

Figure 3 is an electrical schematic diagram of a system module;

Figure 3a is a connection diagram of a system module;

Figure 4 is a structural diagram of the secondary measurement and control module;

Figure 5 shows the process of establishing a new operation mode in the integrated file management of the graphic model;

Figure 6 is a schematic diagram of the primary electrical main wiring (including 6 unit cabinets, 2 power supplies, 4 loads);

Figure 7 is a network diagram of a simulated radial structure;

Figure 8 is a network of simulated hand-in-hand ring structures;

Figure 9 shows the analog dual-ended power structure network.

Among them, 1 unit cabinet, 2 monitoring center, 3 - system module, 4 secondary measurement and control module, 5 communication module, 6-time electrical interface, 7 grid analog component module, 8 secondary electrical interface, 9J shielding layer, 10 Analog ground, 11 neutral, 12 neutral I, 13 neutral II, 14 three-phase bus, 15 voltage transformer, 16 terminal block, 17 current transformer I, 18 circuit breaker I, 19 current Transformer II, 20 circuit breaker II, 21 circuit breaker III, 22 measurement and control device, 23 display panel, 24 power supply, 25 communication front-end, 26 display interface, 27 communication interface, 28 circuit breaker IV, 29 current transformer III, 30 analog ground interface, 31 neutral interface.

detailed description

The invention will be further described below in conjunction with the drawings and embodiments.

In Fig. 1, a plug-and-play smart grid experimental training system based on grid architecture, comprising a plurality of unit cabinets 1, each unit cabinet 1 is composed of a mX n array, wherein m and n are integers;

Each unit cabinet 1 is provided with a primary system module 3, a secondary measurement and control module 4 and a communication module 5;

The unit cabinet 1 is provided with a primary electrical interface 6 and a secondary electrical interface 8. The unit cabinet 1 is connected to the adjacent unit cabinet 1 and the secondary measurement and control module 4 through a primary electrical interface 6, and the primary system module 3 is also provided with a grid analog component module 7 , power system simulation of different system voltage levels and different line lengths through changes in component types and parameters;

The secondary measurement and control module 4 completes the measurement and control execution function, and converts the voltage and current of the primary system module 3 into a secondary voltage and current consistent with the actual system, and then transmits it to the monitoring center, which is completed under the unified control of the monitoring center. Fault detection and isolation, island detection and operation control, and new energy generation grid-connected control;

The communication module 5 realizes real-time communication between the monitoring center, the unit cabinet and other primary and secondary devices through different communication channels, and all the communication modules 5 of the unit cabinet 1 in the system are connected with the communication devices of the monitoring center 2, and the group cost physical The communication network of the analog system connects all the external devices connected to the primary electrical interface 6 and the secondary electrical interface 8 of the unit cabinet 1 through the standard communication interface of the communication module 5 of the unit cabinet 1 to access the communication network of the system, thereby Unit cabinet 1, monitoring center 2 realizes communication function;

The monitoring center 2 is mainly composed of workstations and/or servers to complete the management of the entire system.

2a-2e, the unit cabinet 1 is provided with a J-type shielding layer 9, wherein the communication module 5 is disposed at the top of the unit cabinet 1 and also at the upper portion of the J-type shielding layer 9, thereby being associated with the primary system module 3 and the second The measurement and control module 4 is isolated; a system module 3 is provided on the front side of the unit cabinet 1, and a grid analog component module 7 in the system module 3 is provided on the front bottom, and the two are electrically connected, and the analog ground 10 and the neutral line 11 interface Set on the unit cabinet 1; behind the unit cabinet 1 is provided with a secondary measurement and control module 4, the primary system module 3, the grid analog component module 7 is located on the same side of the J-type shielding layer 9, but the former two and the secondary measurement and control module 4 Separated by a J-type shield layer 9.

In FIG. 3 and FIG. 3a, the primary system module 3 further includes a neutral line 11 which is divided into a neutral line I section 12 and a neutral line II section 13 by a circuit breaker IV28, the neutral line. The two ends of the 11 are respectively connected to the neutral line of the primary electrical interface 6; An analog ground line 10, the two ends of which are respectively connected to the ground line of the primary electrical interface 6; the neutral line I section 12 and the neutral-line II section 13 and the analog ground line 10 are respectively connected to the neutral of the unit cabinet 1 The line interface 31 and the analog ground interface 30 realize different neutral operation modes of the power system through different connections between the neutral line interface 31 and the analog ground interface 30.

- Busbar mode - block - using - single busbar or double busbar - shape - type - three - phase busbar - Π, - three - phase mother - line 14 and - Cffil sensor 1 connection, secondary circuit of voltage transformer 15 Connected to the secondary measurement and control module 4 through the terminal block 16;

At the same time, the three-phase bus 14 is also connected to k lines, wherein the k-2 lines are provided with a current transformer 117 and a circuit breaker 118 and then connected to the primary electrical interface 6; the secondary circuit of the current transformer 117, the circuit breaker 118 The control loop is connected to the secondary measurement and control module 4 through the terminal block 16; the remaining two lines are connected to the corresponding current transformer ΙΠ9 and the circuit breaker 1120, respectively, and are respectively connected to the two ends of the grid analog component module 7, wherein the current transformer 1119 is two The secondary circuit and the circuit breaker 1120 control circuit are connected to the secondary measurement and control module 4 through the terminal block 16; one end of the power supply analog component module 4 is connected to the primary electrical interface 6 through the corresponding current transformer ΙΠ29 and the circuit breaker III21, and the circuit breaker III21 passes through the terminal The row 16 is connected to the secondary measurement and control module 4, the neutral point of the grid analog component module 7 is connected to the neutral line 11 of the primary system module 3, and the ground line is terminated to the analog ground line 10 of the primary system module 3.

In Fig. 3b, the grid analog component module 7 is mainly an analog line or a transformer, which is mounted on a standardized trolley and uses an analog line of a π-type concentrated parameter model.

In FIG. 4, the secondary measurement and control module 4 includes a plurality of measurement and control devices 22, a display panel 23, a power supply 24, and a communication front-end machine 25; a display panel 23 is disposed on the top of the unit cabinet 1, and the display interface 26 and the communication front-end machine are provided. 25, the display panel 23 receives and displays the information transmitted by the monitoring center 2; each of the measurement and control devices 22 is connected to the communication front-end unit 25 and then connected to the communication module 5 via the communication interface 27. The secondary electrical interface 8 includes a voltage loop interface connected in parallel with the voltage measurement secondary circuit, a current loop interface connected in series with the secondary circuit of the current measurement, and a circuit breaker control loop interface for connecting the secondary side accessory device to be installed locally or the unit cabinet. . The communication interface 27 is connected to the communication module 5 or the communication front-end unit 25.

The monitoring center 2 is provided with a GPS clock timing device.

Now take a 3x3 unit cabinet array mode system as an example, as shown in Figure 6, illustrating a specific embodiment of the present invention - due to the complexity of the specific operation mode of the power grid, in this example only the most common three modes of operation (ie, radiation) The realization of the operation mode of the grid structure smart grid physical simulation system proposed by the present invention is illustrated by the implementation of the network structure, the hand-in-hand ring structure network, and the double-ended power structure network.

In FIG. 7, the radial structure of the network: the monitoring center by the first array cell counter 1 ₁ 1 # 2 remote control closure system, 2tt, 5 #, 6 # breakers, a ₁₂ second # 1, # 2 , 1 5tt, 6 1 circuit breaker in the first _¾1 lft 3 #, 5 #, 6 # breakers, of a ₂₁ 1 #, 3 # breakers, in the _second, 5ft, 6 # breaker, In the _2nd , the 1# and 2# circuit breakers and the other position circuit breakers are all in the opening position. As shown in Fig. 7, a radial structure network can be constructed, and the primary system main wiring diagram is a radial structure.

In Fig. 8, the ring structure network is hand-in-hand: In the system, the 1#, 2#, 3#, 5#, 6 in the a _uth unit cabinet 1 shown in Fig. 8 is closed by the monitoring center 2 remotely. # breaker, a ₁₂ second # 1, # 2, # 5, # 6 circuit breaker, of a ₂₁ 1 #, 3 # # 5, # 6 circuit breaker, the second a ₃₁ 2 #, 4 #, # 6 circuit breaker, the _second of the # 2, # 5 circuit breaker 61, the position of the other circuit breaker is in the OFF position, shown in Figure 8, to constitute a ring network structure hand in hand, the switch handle For the 1# circuit breaker in a ₃₂ , the main system wiring diagram of the primary system is hand-in-hand ring structure.

In Fig. 9, the double-ended power supply structure network: In the system shown in Fig. 6, the remote control of the monitoring center 2 closes the 1#, 2#, 5#, 6# in the _a- th unit cabinet 1 shown in Fig. 9. Circuit breaker, 1#, 2H, 5#, 6ίί circuit breaker in the a _12th , 1#, 3ίί circuit breaker in the a ₂₁ , 2#, 3#, 4#, 6# in the a _:!1 Circuit breaker, ₂ 2#, 5#, 6# circuit breakers in the 2nd, all other circuit breakers are in the opening position, which can form a double-ended power structure network, as shown in Figure 9, its primary system master The wiring diagram is. Double-ended power supply structure.

In FIG. 5, the working condition of the graphic integrated monitoring and management software platform of the present invention is described:

Use the user management function of the integrated monitoring and management software platform to set up users with four permissions: administrator, super user, normal user and visitor. Among them, the administrator has the highest authority of the system, and the super user has all the rights except the user management. The ordinary user only has the right to obtain data in real time and analyze online or offline in the background of the login workstation. Only have access to some open data. During the daily experiment training of the platform, only one user with the permission of the super user is allowed to log in.

Take Figure 8 as an example of a hand-operated ring network. The operation process is as follows:

— Super-level—Use ³ "^-land" 3⁄4fT "This allows only one user with the permission of the super user to log in), and create a new operation mode according to the process shown in Figure 5. First step, in the graphical interface, join The required an, a ₁₂ , a ₂₁ , a ₃₁ , a ₃₂ total of five unit cabinet objects , and power supply , load , fault occurrence device and other corresponding objects , and set the operation of each circuit breaker according to the operation mode to be established Mode (normally open / normally closed, valid / invalid), communication mode (such as three sets of communication systems used at the same time); the second step, define the protection function, self-healing control function and other methods, configure the monitoring center to push to the unit cabinet display The third part, the "run mode setting" operation, the system automatically performs the verification, after the verification is successful, the corresponding normally closed node will be automatically closed, and the corresponding system wiring diagram and telemetry and remote information list will be generated. (For circuit breakers that are set to be invalid, the system defaults to no longer transmitting their corresponding telemetry and remote signaling information.) After the list is generated, it can be manually modified as needed. While the step is in progress, the new run mode file can be saved or saved at any time.

Next, according to the preset operation ticket of the network system hand-in-hand power supply ring network startup, the whole system can be started; the server will transmit a picture of the system to other ordinary users who log in on the network and related Real-time data, ordinary users can use the real-time data of the experimental system received, perform various background analysis in the computer they log in (these analysis does not need to send control or adjustment instructions to the physical simulation system); User-set data that is open to visitors.

If the fault test is needed, the fault occurrence device can be connected to the electrical interface of the corresponding unit in the predetermined fault location, and the super user can realize the setting and occurrence of the fault type through remote operation.

All data and operations during the experiment can be recorded and saved in the server (a separate data storage server can be set up). After the end of the experiment, according to the previously set operation ticket of the network system hand-in-hand power supply ring network startup, the whole system can be stopped.

After the end of the experiment, if you need to analyze the data in the experimental process of the system, you can use the super user to call up the corresponding data for analysis, and can perform historical replay operations.

If the test is still needed next time, the saved operation mode configuration file can be directly opened by the super user, and the "run mode setting" operation can be performed.

Claims

A plug-and-play smart grid experimental training system based on a grid structure, characterized in that it comprises a plurality of units 3⁄4, each unit cabinet constitutes a mX n array, wherein m and n are integers;

– a primary system module, a secondary JS block and a communication module;

The unit cabinet has one electrical interface and a secondary electrical interface. The unit cabinet is connected to the adjacent unit cabinet through one electrical interface. The primary system module in the unit cabinet is connected to the secondary measurement and control module through the terminal block, and the system module also has a power grid. Analog component module, which simulates power system simulations of different system voltage levels and different line lengths through changes in the type and parameters of the grid analog components;

The secondary measurement and control module completes the measurement of each line current and bus voltage in the primary system module and the control of the circuit breaker, and converts the voltage and current of the primary system module into secondary voltage and current backward monitoring consistent with the actual system. Center transmission, under the unified control of the monitoring center, complete fault detection and isolation, island detection and operation control, and new energy generation grid-connected control; communication module, realize monitoring center, unit cabinet and other primary and secondary equipment through different communication channels Real-time communication, all unit cabinet communication modules in the system are connected with the communication equipment of the monitoring center, and the group costs the communication network of the physical simulation system, and all the external devices connected to the primary electrical interface of the unit cabinet and the secondary electrical interface. All of them are connected to the communication network of the system through the standard communication interface of the communication unit of the unit cabinet, thereby realizing communication with each unit cabinet and the monitoring center; the monitoring center is mainly composed of workstations and/or servers, and completes management of the entire system.

2 . The grid-based plug-and-play smart grid experimental training system according to claim 1 , wherein the unit cabinet is provided with a J-type shielding layer, wherein the communication module is disposed at the top of the unit cabinet. Also located in the upper part of the J-type shielding layer, the secondary measurement and control module is placed on the back of the unit cabinet and also on the left side of the J-type shielding layer, thereby realizing the isolation of the primary system module, the secondary measurement and control module and the communication module; There is a system module, and the power supply analog component module in the system module is provided at the bottom of the front, and the two are electrically connected; the analog ground and neutral interface are set on the primary system module; the primary system module and the power supply analog component module are located at J. The right side of the shield is below and below, but the two are separated from the secondary monitoring module by a J-shield.

The grid-based plug-and-play smart grid experimental training system according to claim 1 or 2, wherein the primary system module further comprises a neutral line, and the neutral line is disconnected. The device is divided into a neutral line I segment and a neutral line segment II, and the two ends of the neutral line are respectively connected with the neutral line of the primary electrical interface;

The neutral line I segment and the neutral line segment II and the analog ground line are respectively connected to the neutral line interface and the analog ground line interface of the unit cabinet, and are realized by different connections between the neutral line interface and the analog ground line interface. A variety of power system neutral point operation mode; busbar module, using single busbar or double busbar form three-phase busbar, three-phase busbar and voltage transformer primary loop connection, voltage transformer secondary loop through terminal block and secondary measurement and control module Connection

At the same time, the busbar module is also connected with k analog lines; wherein the k-2 analog lines are connected to the primary electrical interface through the current transformer and the circuit breaker, and the secondary side of the current transformer and the circuit breaker control loop pass through the terminal block and The second measurement and control module is connected; the remaining two analog lines are also connected with the corresponding current transformer and circuit breaker, and respectively connected to the two ends of the power grid analog component module, wherein the current transformer secondary return 'circuit and circuit breaker control loop also pass through the terminal block Connected to the secondary measurement and control module; one end of the power supply analog component module is connected to the primary electrical interface through a corresponding circuit breaker, and the circuit breaker control loop is connected to the secondary measurement and control module through the terminal block;

4. The grid-based plug-and-play smart grid experimental training system according to claim 1 or 2 or 3, wherein the grid analog component modules are mainly analog lines or transformers, and Installed on the ^^ quasi-car. +

The grid-based plug-and-play smart grid experimental training system according to claim 1 or 2 or 3, wherein the secondary measurement and control module comprises a plurality of measurement and control devices and a secondary electrical interface. , display panel; display panel is set at the top of the unit cabinet, the display panel receives and displays the information sent by the monitoring center.

6 . The grid-based plug-and-play smart grid experimental training system according to claim 1 , wherein The monitoring center is equipped with a GPS clock timing device.