RU64833U1 - CONTROL INFORMATION RECEIVING AND TRANSMISSION NETWORK FOR CONTROL SYSTEMS - Google Patents

Abstract

The utility model relates to the field of electric power industry and can be used for control systems (CC ARCHM, CRN and PA) of integrated energy systems (ECO). The objective of the utility model is to develop and create an independent, i.e. not included in the OIC automated dispatch control system ASDU, a network for receiving and transmitting control information for control systems necessary for their reliable and efficient operation, performing all the functions of well-known television information networks, but eliminating the disadvantages of these networks, as well as having additional advantages: isolation from the general the amount of information transmitted; information necessary for the management of energy facilities; performance within 1 second; reliability of processing and formation of control actions; the exclusion of the possibility of obtaining false information; the ability to conduct logical processing and analysis of information directly at the control facilities; transferring information in named units; continuous monitoring of the state of communication channels and the time of information transfer. The task is achieved by the fact that at power control facilities (power plants and substations), complexes for receiving and transmitting control information (KPPU) are installed, and at control centers of the ECO, a station for receiving and transmitting control information (SPPU) connected with control systems is installed, and for exchange The data uses the Modbus RTU protocol.

Description

The utility model relates to the field of electric power industry and can be used in centralized systems for automatic regulation of frequency and active power flows (ARCM CS), central voltage regulators (CRC) and emergency control automation (PA) of integrated energy systems (ODE of Siberia, ODE of the East, ODE of the Urals, ODE of the North Caucasus, ODE of the Center, ODE of the North-West, ODE of the Middle Volga).

At present, teleinformation networks (TIS) developed in Soviet times are known for the automatic exchange of teleinformation (TI telemetry, TU television signals, TU telecontrol commands and TR teleregulation channels) between telemechanics (digital and analog communication equipment) between telemechanics ( UTM) installed at power facilities and central transceiver stations (CPSS) of operational information management systems (OIUK) installed at control centers (DC) of remote power systems (OES), as well as for the exchange of TI, TS, TU, TR, operational alphanumeric information (TsBI) between the central control center of dispatch centers of different control levels (Automation of dispatch control in the electric power industry. V.A. Barinov, A.Z. Gamm, Yu.N. Kucherov, V.G. Ornov, Yu.N. Rudenko, V.A.Semenov and others. Under the general editorship of Yu.N. Rudenko and V.A.Semenov. - M .: MEI Publishing House, 2000 G., pp. 57-58.) This information provides the functioning of the subsystems of the automated dispatch control system (ASDU): a centralized automatic control system frequency control and active power flows (CA AGC) and automatic (PA). CA ARCHM is designed to control the modes of integrated power systems.

A variety of UTMs (UTM-1, UTM-7, and TM-512) are used as terminal devices at power facilities, which are used to receive control actions and transmit feedback signals to the upper level of the ARCHM central unit.

The main disadvantages of the considered information network (TIS) are (Automation of dispatch control in the electric power industry. V.A. Barinov, A.Z. Gamm, Yu.N. Kucherov, V.G. Ornov, Yu.N. Rudenko, V.A. Semenov et al. Under the general editorship of Yu.N. Rudenko and V. A. Semenov. - M.: MEI Publishing House, 2000, pp. 57-58.):

a significant number of obsolete morally and physically telemechanical devices (UTM-7, UTC-1, etc.) requiring replacement, as not modernized for more than 30 years;

information delivery time up to 30 s, which is significantly longer than required (1 s);

low noise immunity;

there is no possibility to conduct logical processing and analysis of the received information, which is unacceptable for modern control systems in the electric power industry;

lack of modern programmable telemechanics devices with advanced functions for collecting, processing and transmitting information;

there is no control over the state of communication channels and the time of information transfer.

the use of low-speed channels, which leads to a limitation of the amount of transmitted television information, an increase in the delay time, an increase in the dynamic error at all control levels, the inefficiency of using more modern transmission protocols, etc.

TISs are also known that ensure the exchange of information via telemechanics channels (digital and analog communication equipment) with the upper level of the ARCHM CA, in which at the control centers

power systems are also used by the central control center of the integrated control system, which are part of the automated control system, but instead of UTM (UTK-1, UTM-1, TM-512, etc.), power plants use a digital unscheduled load adjuster (CEC) of a power plant based on SMART-KP telemechanics equipment CJSC “RTSoft” (RNMogilko “Digital unscheduled load generator of a power plant based on telemetry equipment SMART-KP”, “Computer Automation World” magazine (ICA) No. 6, 2002).

The central power plant central station is built on the basis of SMART-KP telemechanics equipment, which is an intelligent device based on the programmable logic controller (PLC) SMART - I / O from PEP Modular Computers (Germany).

The central element of the central locking center is the SMART-BASE processor unit, which performs computing and communication functions. And the input-output modules that are part of the DSPC provide interface between the controller and external circuits. The operator’s console solves the visualization of the regulatory process, manual control of the central heating and ventilation unit, as well as monitoring and diagnosing the software and hardware complex (PTK).

The central station of the power plant performs the following functions:

reception of the control action from the upper level of the ARCHM CA (in the form of an unscheduled task of the power of the power plant), in accordance with the protocol of the UTK-1 telemechanics equipment, transmitted in the form of an 8-bit telecontrol signal and 4 tele-signals of the TV disconnect and television connection;

scaling the received control action code in accordance with a given linear scale characteristic;

working out and memorizing the adopted control action (integral component) with the help of a tracking system consisting of an integrator covered by negative feedback (OOS);

the issuance of the integral and proportional components of the control action to the station power control system through two separate independent output circuits;

input and development of signals from manual control elements;

displaying the necessary information and signaling about the operation and status of the central heating and ventilation center and its protection for station duty personnel;

collecting the necessary information about the operation of the power plant under the control of the ARCHM CA, generating generalized signals about the operation and condition of the central control center and transmitting this information to the upper level of the ARCHM CA through telemechanics channels in accordance with the protocol of telemechanics equipment TM-512;

protection against improper operation of the device or damage to hardware.

The disadvantages of the networks using the central heating and ventilation equipment on the basis of SMART-KP telemechanics equipment at power facilities are due to the fact that outdated protocols of the UTK-1 telemechanics equipment are used for receiving and transmitting control information for the ARCHM CA. These disadvantages include:

significant delays in the reception and transmission of control information, during which there is no control over the state of communication channels and the time of information transfer;

lack of ability to conduct logical processing and analysis of received information;

information from the sensors comes in the form of an eight-bit code, which causes a large discreteness in the values of power flows.

The presence of these shortcomings is unacceptable to ensure the reliable operation of control systems in the electric power industry (CC ARCHM, CRN and PA).

The objective of the utility model is to create an independent network for receiving and transmitting control information for control systems in the electric power industry (CC ARCHM, CRN and PA), necessary for their reliable and

effective work, performing all the functions of well-known television information networks, but eliminating the disadvantages of these networks, as well as having additional advantages that provide:

reliability, i.e. completely duplicated and fault tolerant architectures;

allocation of information necessary for managing information from the total amount of information from management objects;

performance within 1 second;

logical processing and diagnostics of information directly at the control objects;

reliability of processing and formation of control actions, which excludes the possibility of obtaining false information;

information transfer in named units (megawatts, kilovolts, amperes, etc.);

constant monitoring of the state of communication channels and the time of information transfer;

The problem is achieved in that the network for receiving and transmitting control information for control systems, including telemechanics channels (digital and analog communication equipment), telemechanics equipment based on industrial logic controllers (PLCs) and installed on power plants of the ECO (power plants and substations) , which are the complexes of reception and transmission of control information (KPPU), differs from known analogues in that:

is independent because not included in the operational information complex (DEC) of the automated dispatch control system (ASDU);

at the control centers of the integrated power systems (DP OES) instead of the central transmitting and receiving stations of the centralized traffic control center of the OIC

the control information receiving-transmitting stations (SPPU) are installed, made on the basis of the PLC;

instead of the outdated protocols for the exchange of data of telemechanics devices (UTK-1, TM-512), Modbus RTU protocols are used.

The inventive utility model is illustrated in the drawing, which shows a block diagram of a network for receiving and transmitting control information for control systems (for example, CA ARCHM).

The network for receiving and transmitting control information for control systems consists of:

a station for receiving and transmitting control information (SPPU) 1, installed on the DP of the OES and consisting of two programmable logic controllers (PLCs) 2 and 3;

a complex for receiving transmission of control information installed at electrical substations (KPPU PS) 4;

a complex for receiving transmission of control information installed at power plants (KPPU ES) 5;

two-channel communication equipment 6, including equipment and telemechanical communication channels (digital or analog) that connect SPPU 1 to KPPU PS 4 and KPPU ES 5;

control system (CC ARCHM) 7;

control network controller Link (CLK) 8, which interconnects PLC 2 and 3 with the control system 7.

The operation of the network for receiving and transmitting control information for control systems in the electric power industry consists in the fact that information about the state of control objects (power plants and substations) is collected and processed at KPPU 4 and 5 and then automatically transmitted through communication equipment 6 to SPPU 1 installed on the power supply ECO, to process information received from all energy management facilities, and via the Controlltr Link 8 control network, is automatically transmitted to the control system (CC ARCHM) 7, which, in its

the queue, based on the information received, generates control actions for the control objects and automatically translates them in reverse order (feedback) through the control network CLK 8 to SPPU 1 then through communication equipment 6 to KPPU 4 and 5, which control the group regulators of active and reactive power at power plants and actuators at substations.

The complexes of reception and transmission of control information (KPPU PS) 4 and (KPPU ES) 5, made on the basis of programmable logic controllers (PLC) and installed on control objects (ES and ES) are designed to receive and transmit control information, i.e. provide information exchange with the upper level of control systems in the electric power industry (CC ARCHM, CRN and PA).

Depending on the tasks performed, KPPU 4 and 5 can be equipped with various modules:

communication modules of exchange on the RS-232 / RS-422 / RS-485, Ethernet, Profibus, Controller Link interface;

modules of analog or discrete input-output.

The configuration of KPPU 4 and 5 modules can be easily changed, supplemented depending on the necessary control tasks, as well as on the types and number of connected group active power controllers (GRAM), which allows the information necessary for control to be extracted from the general stream transmitted from control objects ECO power facilities.

To communicate with SPPU 1, a modern reliable and simple Modbus RTU data exchange protocol is used, which is very important in control tasks.

Functionality of KPPU 4 and 5:

collection of discrete (television signals) and analog (telemetry) information necessary for controlling information from electrical equipment

energy management objects (ES and PS) and the transfer of this information to the upper level of control systems;

receiving control actions from the upper level of control systems (in the form of an unscheduled task of power of a power plant, etc.) in accordance with the Modbus RTU data exchange protocol transmitted in 16-bit words;

perform diagnostics of the reliability of the received information and generate an average value for analog parameters in 1 second;

to perform the functions of an unscheduled power master (HWM) and voltage settings (UN) for group regulators of power plants;

receive control commands from SPPU 1, which allow you to change operating modes (transfer to commissioning mode, the degree of smoothing of analog parameters, setting the permissible rate of change of unplanned power, etc.) and the speed of working with SPPU 1 through communication equipment.

Thus, KPPU 4 and 5 significantly expand the capabilities of managing power facilities in terms of the volume and quality of information, completely replace the functions of existing obsolete telemetry devices of UTM and eliminate all the shortcomings associated with their work.

A control information reception and transmission station (SPPU) 1, made on the basis of two PLCs 2 and 3, whose main function is to collect information about the state of energy objects of the ECO control and transfer control actions from control systems (CC ARCHM, TsRN and PA) to control objects.

The composition of each PLC 2 and 3 SPPU 1 includes:

Power Supply;

processor module;

communication modules (each with two RS-232 ports);

Ethernet module

Controller Link module.

Controller Link modules are designed for fast automatic exchange of control information between PLC 2 and 3 of SPPU 1 and control systems (ARCHM central control system, central control center and automated control system).

Ethernet modules are used for user access to PLC data 2 and 3 within the local area network (LAN) or for developers to download programs to the PLC 2 and 3 via the network, as well as to monitor the operation of PLC 2 and 3. Monitoring the operation of SPPU 1 and archiving is performed LAN SCADA-program installed on a personal computer (PC) telemechanics. Archives can be organized on flash memory installed in PLC 2 and 3, and transmitted by e-mail.

The exchange of control information between SPPU 1 and KPPU 4 and 5 is carried out via the RS-232 interface through communication equipment using the standard data exchange protocol based on Modbus RTU. The two-byte checksum used in this protocol for checking the reliability practically reduces to zero the possibility of obtaining false information. SPPU 1 is the main one in the organization of the exchange of management information with KPPU 4 and 5 installed at power facilities. SPPU 1 controls the operating modes of KPPU 4 and 5, and also controls the working hours of the exchange on each communication channel.

A necessary and sufficient condition for reliable operation of the network for receiving and transmitting control information for control systems, i.e. communication of SPPU 1 with KPPU 4 and 5, there is a two-channel data exchange between SPPU 1 and KPPU 4 and 5. In this case, both channels are constantly in working condition, and SPPU 1 automatically selects which channel will be used as the main one and which one as a backup. Each channel KPPU 4 and 5 is associated with two PLCs 2 and 3 SPPU 1. If one of the two PLCs fails and the second PLC automatically continues to work.

Data reception and transmission is carried out in 16-bit words, which allows you to receive and transmit data in named units (megawatts, kilovolts, amperes, etc.) in the range of values from -32768 to +32768.

The interaction between SPPU 1 and control systems 7 (ARCHM central control system, CRN and PA) is carried out by the controller Link 8 control network, which integrates programmable logic controllers 2 and 3 of SPPU 1 and control systems 7 for fast automatic data exchange.

The use of SPPU 1 made it possible to change the approach to organizing the model of control systems in the electric power industry. It became possible to separate the function of collecting and transmitting information for technological problems with the function of direct calculation of control actions, which allowed to increase the speed of transmission of control information (1 second)

With the introduction of SPPU 1, control systems 7 (ARCHM central control system, etc.) implements only the algorithm for calculating control actions, and SPPU 1 collects information about the state of energy objects of ECO control and transfers control actions from control systems to control objects (power plants and substations).

The proposed utility model completely replaces the functions of well-known television information networks, eliminates their shortcomings and has advantages that provide reliable and efficient operation of control systems 7 (CC ARCHM, CRN and PA), namely:

independence, i.e. It does not depend on the work of the OIC and other information systems of the automated control system, although in principle it has the ability to connect to them

allocation of information necessary for managing information from the total amount of information from management objects;

the reliability of the received and transmitted control information;

reliability, i.e. fully duplicated fault tolerant architecture;

guaranteed speed of obtaining control information within one second (1 s);

logical processing and diagnostics of information directly at the control objects;

information transfer in named units (megawatts, kilovolts, amperes, etc.);

smoothness and accuracy of regulation - up to 1 MW, 1 kV;

monitoring the state of communication channels and the transmission time of control information.

The network for receiving and transmitting control information generally complies with the requirements of the “Rules for the Installation of Electrical Installations”, “the Rules for the Technical Operation of Electric Stations and Networks of the Russian Federation”, “The Interindustry Rules for Labor Protection in the Operation of Electrical Installations” and the “Concept for the Development of Automatic Frequency Control and Active Power Transmission Systems of UES ", And is designed for long-term operation.

Claims (1)

A network for receiving and transmitting control information for control systems, including telemechanics channels (digital and analog communication equipment), telemechanics equipment made on the basis of industrial logic controllers (PLCs) and installed on power plants of the ECO (power plants and substations), which are the reception complexes transmission of control information (KPPU), characterized in that it is independent because not included in the operational information complex (DEC) of the automated dispatch control system (ASDU); at control centers of the integrated power systems (DP OES), instead of the central transceiver stations of the CPSS OIC, control information reception and transmission stations (SPPUs) based on the PLC are installed; instead of outdated protocols for the exchange of data of telemechanics devices (UTK-1, TM-512, etc.), Modbus RTU protocols are used.