CN111917187B

CN111917187B - Intelligent substation cloud monitored control system

Info

Publication number: CN111917187B
Application number: CN202010784148.4A
Authority: CN
Inventors: 刘硕; 程相旭
Original assignee: Shandong Kehong Electronic Technology Co ltd
Current assignee: Shandong Kehong Electronic Technology Co ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2022-04-22
Anticipated expiration: 2040-08-06
Also published as: CN111917187A

Abstract

The invention provides an intelligent substation cloud monitoring system which comprises a plurality of remote field exchange terminals arranged in a target area of an intelligent substation. The intelligent substation comprises a process layer, a spacer layer and a station control layer; the process layer includes a plurality of remote terminal units connected to a plurality of intelligent primary devices; the spacing layer comprises a plurality of edge computing terminals, the edge computing terminals are communicated with the remote field exchange terminals, and computing results are sent to the station control layer; the station control layer is in wireless communication with a remote cloud monitoring center, receives a scheduling instruction of the remote cloud monitoring center and then sends the scheduling instruction to the spacing layer; the station control layer further comprises an automatic protection device test system, and the automatic protection device test system receives the field device parameters collected by the remote terminal units and the calculation results of the edge calculation terminals and executes automatic tests on the spacing layer and the process layer.

Description

Intelligent substation cloud monitored control system

Technical Field

The invention belongs to the technical field of intelligent substations, and particularly relates to an intelligent substation cloud monitoring system.

Background

With the development of society, the infrastructure of urban buildings and public areas is increased, the demand of people on electric power in China is higher and higher, and the scale of an electric power system is larger and larger. At present, China has entered the third generation power grid era, namely the smart power grid era.

The intelligent substation is taken as an important component of a strong intelligent power grid, is greatly popularized and constructed in China, and intelligent secondary equipment such as an intelligent relay protection device and the like is also widely applied. Compared with the traditional protection device, the new protection device has larger differences in various aspects such as structure, information sharing standard, transmission mode, daily operation maintenance and overhaul and the like, and simultaneously provides higher requirements for the relay protection test technology in the aspects of instantaneity, reliability, accuracy and the like. Therefore, the intelligent substation adopts the IEC61850 standard at present, and all aspects such as the function, the definite value, the interface and the like of the protection device are strictly limited, so that the standardization, the standardization and the unification of the design are realized, and meanwhile, convenience is provided in the aspect of interactive sharing of data.

The intelligent transformer substation is difficult to build and high in construction cost, and the service life of the intelligent transformer substation can be prolonged to the maximum extent by adopting scientific and effective operation and maintenance management, so that the social economic benefit is improved. The cloud computing realizes the integration and sharing of information resources to the maximum extent, and an operation platform is established for various applications and information services through an intelligent substation information center system established by the cloud computing. On the platform consisting of a large number of heterogeneous servers and a virtualized intelligent substation data center, information resources and computer capability can be maximally utilized.

Chinese patent application No. CN201911249799 proposes an intelligent regional substation scheduling system and method based on edge internet of things, where the system takes a substation power supply region as an example and includes: the intelligent substation system comprises an intelligent substation system, a vehicle-mounted data acquisition control system, a charging station management system and a user data acquisition control system. The method is characterized in that edge calculation is adopted at a data acquisition terminal based on edge internet of things, different strategies are made according to different requirements of a power distribution network, and the method is coordinated with an intelligent substation system to make decisions, so that the set temperature of the vehicle-mounted air conditioners of the group electric vehicles is actively pre-adjusted to realize ordered charging and discharging, and the set temperature of the air conditioners in fixed building rooms is actively pre-adjusted to realize ordered power utilization of users. The invention innovatively adopts a cloud-edge cooperative control method, adopts edge calculation at a user side, and jointly decides a dispatching method for stabilizing the overload of the transformer substation with an intelligent transformer substation system; on the basis of the existing limited transmission bandwidth, the data of the user side is transmitted in a differentiated mode, transmission time delay is reduced, and scheduling timeliness is enhanced.

The Chinese invention patent application with the application number of CN201510875130 provides an intelligent substation cloud resource monitoring system, wherein a data storage module is connected with a data acquisition module and used for storing data acquired by the data acquisition module; the cloud monitoring management module is connected with the data storage module, calls data of the data storage module for monitoring management, and makes a decision on a monitoring result; the WEB service module is connected with the cloud monitoring management module, receives the decision information sent by the cloud monitoring management module, and performs man-machine interaction with a user. The technical scheme provides a user-oriented cloud resource monitoring solution, and a user customizes a monitoring request and drives a monitoring strategy according to the user request; the WEB service end facing the user is convenient for the user to check the running state of the cloud resource at any time and any place, realizes the monitoring of service and application level and meets the requirement of the service quality of the user.

However, the monitoring systems of the current intelligent substations are all of a closed integrated structure, and the system expandability is insufficient; meanwhile, the service environment is lack of elasticity, and data communication cannot be shared, so that the connection and interaction between services are lack of flexibility, and the information integration capability is insufficient; more importantly, improvements are urgently needed in the aspects of obtaining data to judge validity and executing automatic tests and safety protection.

Disclosure of Invention

In order to solve the technical problem, the invention provides an intelligent substation cloud monitoring system which comprises a plurality of remote field exchange terminals arranged in a target area of an intelligent substation. The intelligent substation comprises a process layer, a spacer layer and a station control layer; the process layer includes a plurality of remote terminal units connected to a plurality of intelligent primary devices; the spacing layer comprises a plurality of edge computing terminals, the edge computing terminals are communicated with the remote field exchange terminals, and computing results are sent to the station control layer; the station control layer is in wireless communication with a remote cloud monitoring center, receives a scheduling instruction of the remote cloud monitoring center and then sends the scheduling instruction to the spacing layer; the station control layer further comprises an automatic protection device test system, and the automatic protection device test system receives the field device parameters collected by the remote terminal units and the calculation results of the edge calculation terminals and executes automatic tests on the spacing layer and the process layer.

Specifically, the intelligent substation system comprises a process layer, a bay layer and a station control layer. The system adopts low-power and compact novel electronic current and voltage transformers to replace conventional current and voltage transformers, adopts advanced electronic devices such as intelligent circuit breakers, adopts an off-speed optical fiber Ethernet to build a data acquisition and transmission system, and realizes information sharing and interoperation between intelligent equipment based on unified modeling of IE C6185O standard.

The process layer comprises a merging unit, intelligent primary equipment and a plurality of remote terminal units connected with the intelligent primary equipment; the remote terminal unit is used for realizing electric quantity detection, state monitoring, operation control, driving and the like. The process layer is connected with a state signal and an actuator of the primary equipment, the working state and the equipment attribute of the primary equipment are digitized through the merging unit and the intelligent terminal, and the process layer is connected with the equipment of the spacer layer through a network formed by a plurality of remote field exchange terminals.

The spacing layer comprises a plurality of edge computing terminals, the edge computing terminals are communicated with the remote field exchange terminals, and computing results are sent to the station control layer.

Through the spacing layer, data acquisition, operation and the like can be realized, and network communication between the process layer and the station control layer is realized.

The station control layer is in wireless communication with a remote cloud monitoring center, receives a scheduling instruction of the remote cloud monitoring center and then sends the scheduling instruction to the spacing layer;

the station control layer further comprises an automatic protection device test system, and the automatic protection device test system receives the field device parameters collected by the remote terminal units and the calculation results of the edge calculation terminals and executes automatic tests on the spacing layer and the process layer.

The station control layer mainly collects the real-time data of each subsystem and continuously refreshes a real-time database; relevant data are sent to scheduling, control and on-line monitoring according to set requirements; receiving control commands in scheduling, controlling and on-line monitoring and sending the control commands to the spacing layer and the process layer for execution; in addition, the station control layer can also realize on-line maintenance, on-line parameter modification and the like on the spacer layer and the process layer equipment, and can automatically test and analyze the faults of the transformer substation.

The station control layer further comprises a control database, and the control database generates control data based on the calculation result of the edge calculation terminal;

the process layer communicates with the spacer layer through the remote field exchange terminal.

The control database stores a substation configuration description file (SCD) of the intelligent substation;

the substation control layer shares the substation configuration description file with the edge computing terminal of the bay layer through the remote field exchange terminal; and based on the shared substation configuration description file, the edge computing terminal performs consistency test on the bay level and the station control level.

The automatic test system for the protection device receives the field device parameters collected by the plurality of remote terminal units and the calculation results of the plurality of edge calculation terminals, and executes automatic tests on the spacer layer and the process layer, specifically comprising:

the automatic test system of the protection equipment comprises a parameter reading layer, a parameter decomposition layer, a parameter judgment fault, an action judgment fault and a topology layer;

the parameter reading layer reads the field device parameters collected by the plurality of remote terminal units;

the parameter decomposition layer decomposes the field equipment parameters to obtain the model, the rated parameter, the protection fixed value of the tested field equipment, and the actually-measured switching value parameter, the actually-measured action parameter or the simulated zero drift performance parameter;

the parameter judgment layer judges whether the switching value parameter, the action value parameter or the simulated zero drift performance parameter is normal or not;

the action judging layer is used for judging whether the real-time action of the field equipment is normal or not when the field equipment parameters are collected;

and the topological layer constructs a process layer network topological structure diagram of the intelligent substation based on the result of the edge calculation.

The topology layer constructs a process layer network topology structure diagram of the intelligent substation based on the result of the edge calculation, and the process layer network topology structure diagram specifically comprises the following steps:

after the edge computing terminal receives the substation configuration description files sent by the remote field switching terminals and the configuration information of each remote field switching terminal, selecting a topology template construction file to generate a remote field switching terminal circulating list;

and based on the remote field switching terminal circulating list, the topological layer circularly acquires the configuration information and generates a process layer network topological structure diagram of the intelligent substation after the configuration information is associated with the substation configuration description file.

The automatic test system of the protection equipment also comprises an alarm value mining system;

inputting the model, the rated parameter, the protection fixed value, the actually measured switching value parameter, the actually measured action parameter or the simulated zero drift performance parameter of the measured field equipment obtained by the parameter decomposition layer into the warning value mining system;

the warning value mining system performs warning value mining based on the input data and outputs at least one warning parameter value;

and the parameter judgment layer is combined with the warning parameter value to judge whether the switching value parameter, the action quantity parameter or the simulated zero drift performance parameter is normal.

The station control layer is in wireless communication with the remote cloud monitoring center, receives the scheduling instruction of the remote cloud monitoring center, and then sends the scheduling instruction to the spacing layer, and the method specifically comprises the following steps:

and the remote cloud monitoring center claims the scheduling instruction after performing performance evaluation on the intelligent substation based on the data sent by the station control layer, and updates the control database.

Further advantages of the invention will be apparent in the detailed description section in conjunction with the drawings attached hereto.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a block diagram of a cloud monitoring system of an intelligent substation according to an embodiment of the present invention

FIG. 2 is a diagram illustrating the structure of an automatic test system for protection devices in the system of FIG. 1

FIG. 3 is a diagram illustrating the system of FIG. 1 parsing an SCD file

FIG. 4 is a schematic diagram of the system of FIG. 1 generating a process level network topology map of the intelligent substation

Fig. 5 is a schematic diagram of the circular list of the remote field switching terminals according to the present invention.

Detailed Description

The invention is further described with reference to the following drawings and detailed description.

Referring to fig. 1, a module composition diagram of an intelligent substation cloud monitoring system according to an embodiment of the present invention is shown.

Fig. 1 shows an intelligent substation cloud monitoring system, which includes a plurality of remote field switching terminals arranged in a target area of the intelligent substation.

In the embodiment illustrated in fig. 1, the remote field switch terminals comprise a plurality of industrial switch terminals.

The intelligent substation comprises a process layer, a spacer layer and a station control layer;

the process layer includes a plurality of intelligent primary devices and a plurality of remote terminal units connected to the plurality of intelligent primary devices.

A Remote Terminal Unit (RTU), which is a special computer measurement and control Unit with a modular structure designed for long communication distance and severe industrial field environment.

The RTU can be implemented in a variety of different hardware and software depending on the nature of the controlled site, site environmental conditions, system complexity, requirements for data communication, real-time alarm reporting, analog signal measurement accuracy, condition monitoring, regulatory control of the device, and on-off control. Because the data transmission protocol, information structure and error detection technology adopted by each manufacturer are different, each manufacturer generally produces a special RTU matched with the SCADA system.

The RTU of this embodiment is the measurement and control module who is exclusively used in intelligent substation data monitoring.

Specifically, the remote terminal unit obtains a plurality of real-time state parameters of the intelligent primary device at different time intervals, wherein the plurality of real-time state parameters include a switching value parameter, an action parameter and a simulated null shift performance parameter.

The spacing layer comprises a plurality of edge computing terminals, the edge computing terminals are communicated with the remote field exchange terminals, and computing results are sent to the station control layer;

the edge computing means that an open platform integrating network, computing, storage and application core capabilities is adopted at one side close to an object or a data source to provide nearest-end service nearby. The application program is initiated at the edge side, so that a faster network service response is generated, and the basic requirements of the industry in the aspects of real-time business, application intelligence, safety, privacy protection and the like are met. The edge computation is between the physical entity and the industrial connection, or on top of the physical entity.

The edge computing terminal is a terminal device which is arranged on the remote site and used for the intelligent substation to achieve edge computing on the local site, can avoid data blockage, and can be matched with cloud computing.

On the basis of fig. 1, referring to fig. 2, it is a schematic structural content diagram of an automatic test system for protection devices in the system of fig. 1.

In one embodiment, the automatic test system for the protection device integrates the MMS protocol into the test system, so that the real-time automatic reading and writing of the protection device constant value, the setting of the test parameters, the switching on and off of the device soft pressing plate in the test process can be realized to match with the current test item, and the whole test process is automatically completed.

More specifically, the parameter judgment layer judges whether the switching value parameter, the motion value parameter, or the simulated null shift performance parameter is normal, and specifically includes:

setting the switching value parameter collected by the remote terminal unit for the ith time as K_iThe last acquired switching value parameter is K_i-1，

If it is

The switching value parameter K acquired at the ith time_iNormal; v_cur、V_preAre all in directionsAn amount;

wherein the content of the first and second substances,

T_L、T_Hthe method comprises the following steps of (1) setting an upper limit value and a lower limit value in advance; i > 2.

Although not specifically written, a similar method may be used for other parameters for determining whether the motion quantity parameter or the simulated null shift performance parameter is normal.

It should be noted that, the above-mentioned determination method fully considers the overall relevance of the performance data of the intelligent substation and the influence of the preceding and following periods, and is one of the creative effects of the present invention.

In the above embodiment, the control database stores a substation configuration description file (SCD) of the intelligent substation; the substation control layer shares the substation configuration description file with the edge computing terminal of the bay layer through the remote field exchange terminal; and based on the shared substation configuration description file, the edge computing terminal performs consistency test on the bay level and the station control level.

The Substation Configuration Description (SCD) file describes, through a Substation Configuration Description language scl (Substation Configuration Description language), communication parameters, instance configurations, communication configurations between devices, signal connection lines, and other relevant information of all intelligent Electronic devices ied (intelligent Electronic devices) in the Substation. Therefore, the functional parameters, the connection mode, the general object-oriented substation event (GOOSE) and the Sampling Value (SV) service parameters of the to-be-tested protection device can be obtained through the substation configuration file. The premise that the consistency of the information of the substation configuration description file and the information of the to-be-tested protection device is ensured is automatic analysis and intelligent monitoring.

Fig. 3 is a schematic diagram illustrating the principle of parsing the SCD file to achieve consistency.

Based on the shared substation configuration description file, the edge computing terminal performs consistency test on the bay level and the station control level, and specifically includes:

decomposing the substation configuration description file to obtain a Header part, a Communication part and an Inputs part;

encoding rows m and columns n of the Header, Communication and Inputs, and assigning values to m, n and a check quantity Zmn;

and checking the m, n and Zmn values of each part, acquiring the checking result of each part, and judging whether the consistency test passes or not.

Meanwhile, a message carrying data content and a communication relationship which are configured in advance in the process layer communication network can be encapsulated in a System Configuration Description (SCD) of the total station, and the monitoring System of the intelligent substation needs to acquire a preset process layer network topology structure through the SCD so as to be used for verification and realize network monitoring and fault location.

The remote field switching terminal takes a switch as a main form, and a schematic diagram of a circular list of the remote field switching terminals is shown in figure 4.

Fig. 5 is a schematic diagram of the system of fig. 1 generating a process level network topology structure diagram of the intelligent substation.

Although not shown, in the above embodiment, the protection device automatic test system further includes an alert value mining system;

The station control layer network structure mode has two types of star and ring, wherein the star network structure is the most common, the network communication nodes of the star network form a cascade star network through a concentrator or a switch, the station control layer network mainly processes data communication among all units in the spacing layer, simultaneously carries out information exchange with the information integration platform and carries out bidirectional exchange with the provincial level network, and the station control layer also realizes the access of the electric power data network. The network platform communicates by means of a network mode integrating MMS and GOOS, and functions of total station information gathering, misoperation-preventive locking and the like are achieved.

In summary, the invention provides a cloud monitoring system under an intelligent substation information support system architecture, which is an open three-dimensional system architecture and is composed of a platform layer, a sensing layer, an application layer and a network layer. It is worth noting that the intelligent processing and computing power in the whole network is embodied in the four levels: the system comprises an enabling control layer of a network layer, an intelligent processing layer in an application layer, a gateway layer of a perception layer and a platform layer big data intelligent analysis and PAAS public service layer. The framework of the open system realizes the balanced deployment of the capacity of the whole system, and ensures that the framework has the characteristics of free expansion, clearness, standardization and future orientation through the mutual association and intelligent distribution of four layers. On the basis of the sub-framework, an environment capable of deleting and adding services freely can be suggested, and the elastic service environment can ensure the connection and interaction among the services.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an intelligent substation cloud monitored control system, cloud monitored control system is including arranging in a plurality of remote on-the-spot exchange terminal in the intelligent substation target area, its characterized in that:

the process layer comprises a plurality of intelligent primary devices and a plurality of remote terminal units connected with the plurality of intelligent primary devices;

the station control layer further comprises an automatic protection device test system, the automatic protection device test system receives the field device parameters collected by the remote terminal units and the calculation results of the edge calculation terminals, and executes automatic tests on the spacer layer and the process layer;

2. The intelligent substation cloud monitoring system of claim 1, characterized in that:

the remote terminal unit obtains a plurality of real-time state parameters of the intelligent primary equipment at different time periods, wherein the plurality of real-time state parameters comprise switching value parameters, action quantity parameters and simulated zero drift performance parameters.

3. The intelligent substation cloud monitoring system of claim 1, characterized in that:

4. The intelligent substation cloud monitoring system of claim 3, characterized in that:

the control database stores a substation configuration description file of the intelligent substation;

the substation control layer shares the substation configuration description file with the edge computing terminal of the bay layer through the remote field exchange terminal;

and based on the shared substation configuration description file, the edge computing terminal performs consistency test on the bay level and the station control level.

5. The intelligent substation cloud monitoring system of claim 1, characterized in that: