CN102778874A - Joint optimization regulation system for cascade hydropower stations - Google Patents

Abstract

The invention discloses a cascade hydropower station group joint optimization control system, the system includes: a remote centralized monitoring system, a water transfer automation system, an electric energy measurement system and a remote image monitoring system; the remote centralized monitoring system and the water transfer automation system Connect after safety isolation through hardware firewall to realize logical isolation, message filtering and access control of two areas; RS232 serial port connection between water transfer automation system and electric energy metering system; remote centralized monitoring system, water transfer automation system, power meter The energy metering system is equipped with a WEB publishing subsystem, and the WEB publishing subsystem is connected to the remote image monitoring system through a router with a firewall. The invention can improve system safety, realize centralized and unified management and scheduling, reduce management personnel, and improve cascade joint scheduling benefits.

Description

Joint optimization control system for cascade hydropower station groups

technical field

The invention relates to a cascade hydropower station group joint optimization control system.

Background technique

In recent years, with the formation and development of cascade reservoirs, the integration and compatibility technologies of multi-power stations and multi-application systems have been in-depth research, and the science and technology related to the centralized control automation system of cascade hydropower stations for hydropower development in the basin have also developed rapidly.

In accordance with the State Economic and Trade Commission [2002] Order No. 30 "Regulations on Security Protection of Power Grid and Power Plant Computer Monitoring System and Dispatch Data Network" and "National Power Secondary System Security Protection Overall Plan", the technical requirements of multiple application systems During integration and data interaction, it is necessary to ensure the network security of the remote centralized control system of the hydropower station group in the river basin, resist malicious damage and attacks in the form of hackers, viruses, malicious codes, etc., prevent system crashes or paralysis, and avoid security incidents caused thereby. Moreover, the cascade hydropower station group is faced with the task of flood control and dispatching of various reservoirs. "Centralized management, unified dispatching, and on-site duty" has become a necessary means to concentrate superior forces, solve manpower shortages, and exert the benefits of cascade joint dispatching.

At present, from the analysis of the internal environment and the external environment, the joint optimization and control system of cascade hydropower station groups is still immature, and the current domestic river basin power generation companies are still in the exploratory stage of cascade reservoir dispatching. In response to this situation, there is an urgent need for a complete cascade large-scale hydropower station group joint optimization and control automation system for multiple regulation performances, which can improve the security of the system's network and data transmission, realize centralized and unified management and scheduling, and reduce scheduling management staff. Increase the benefits of cascade joint scheduling.

Contents of the invention

The purpose of the present invention is to provide a joint optimization control system for cascade hydropower station groups, which can improve the security of the system's network and data transmission, realize centralized and unified management and scheduling, reduce scheduling management staff, and increase the benefits of cascade joint scheduling.

In order to solve the above technical problems, the present invention adopts the following technical solutions: a cascade hydropower station group joint optimization control system, including a remote centralized monitoring system, a water transfer automation system, an electric energy metering system and a remote image monitoring system; the system is divided into production The control area and the management information area (safety area III), the production control area includes the real-time control area (safety area I) and the non-control area (safety area II); The water transfer automation systems in the area are connected after safety isolation through a hardware firewall to realize logical isolation, message filtering and access control of the two areas; the water transfer automation system and the electric energy metering system in the safety area II are connected through the RS232 serial port Connection; the remote centralized monitoring system, water transfer automation system, and electric energy metering system are all equipped with WEB publishing subsystems. The above-mentioned WEB publishing subsystems and remote image monitoring systems are all located in the security zone Ⅲ, and the WEB publishing subsystem passes through a router with a firewall. It is connected with the remote image monitoring system; a special one-way safety isolation device for electric power is installed between the production control area and the management information area to realize physical isolation.

In the aforementioned cascade hydropower station group joint optimization control system, each cascade hydropower station is equipped with a computer monitoring system, using redundant data transmission channels combining SDH optical fiber communication and satellite communication, to realize the remote centralized monitoring system of the cascade hydropower station group and the computers of each cascade hydropower station. Connections for data transfer between monitoring systems. With the application of multimedia technology in hydropower stations, voice, animation, visualization, and video functions are applied to computer monitoring systems to better understand the monitoring situation of hydropower stations. Among them, according to the role of computers in the monitoring system of hydropower stations and their relationship with conventional monitoring equipment, there are generally three modes as follows: 1) Conventional control equipment as the main, computer as a supplement; 2) Computer as the main, conventional control equipment Supplementary; 3) cancel the full computer monitoring system of conventional control equipment. According to the installed capacity of the hydropower station, its role in the power grid and their specific conditions, different monitoring systems can be selected. Generally, newly-built power stations and power stations with conditions (capital, technology and power generation permits, etc.) are suitable to choose the third mode, so as to achieve the goal of one-step completion. For the transformation of old-fashioned hydropower stations limited by other conditions, the first and second modes can be considered as transitions.

In the above-mentioned cascade hydropower station group joint optimization control system, the main functions of the water dispatching automation system include: real-time data collection and processing, real-time monitoring, basic information query and maintenance, medium and long-term forecasting subsystem, real-time flood forecasting, flood control dispatching, and power generation dispatching , Flood control and power generation dispatch consultation, water affairs management. Including data subsystem, model subsystem and decision-making and information service subsystem; among them,

(1) The data subsystem includes the following three levels:

1) The information receiving and processing layer is used to complete the receiving and processing of various basic information;

2) The basic database layer is responsible for recording, storing and managing various basic information data;

3) Dedicated database layer, used to establish various special databases, so as to ensure that the application software of multiple developers will not cause damage to the basic database, and ensure the openness and scalability of the system;

(2) The model subsystem includes models and algorithms for forecasting and scheduling decision support;

(3) The decision-making and information service subsystem is based on the database and model library, and establishes and develops an advanced consultation application system to realize reservoir scientific forecasting and scheduling decision-making; establish a public information query and water transfer business management system to realize information sharing and improve Office automation level; through the man-machine interface to control the call of each module in the form of menu, window and dialog box.

In the aforementioned cascade hydropower station group joint optimization control system, each cascade hydropower station is equipped with an automatic water regime monitoring and reporting system, and the telemetry information generated by the water regime automatic monitoring and reporting system passes through a mixed group composed of Inmarsat_C, VHF, GSM, optical fiber and VSAT satellite communication methods. Network channel, transmitted to the water regulation automation system.

In the aforementioned cascade hydropower station group joint optimization control system, the water regime automatic monitoring and reporting system includes a telemetry station, an information transmission channel, and a central control station (referred to as the central station). The telemetry station is used to automatically collect real-time telemetry information of rainfall, water level, equipment voltage and ambient temperature. under human operation. Under the control of the central station, the telemetry information is compiled into a pulse signal, and transmitted to the central station through an information transmission channel; the information transmission channel adopts a wired or wireless mode. The function of the central station is to collect the hydrological data of each telemetry station in the telemetry system, carry out calculation and arrangement, make flood forecast in time, and control the opening and closing of gates, and carry out water conservancy dispatching; the main equipment of the central station includes communication stations and electronic computers, etc. Generally, small and medium microcomputers are used, and peripherals such as monitors, wide-line printers, and disk drives are configured.

In the aforementioned cascade hydropower station group joint optimization control system, the image monitoring system of each hydropower station is equipped with a protocol conversion device, and the collected images are compressed using the MPEG4 standard so that the collected images can be transmitted to the remote image monitoring system through a 2M dedicated transmission circuit. The image monitoring system of each hydropower station adopts IP protocol and multicast mode to transmit images and other related data, and decompresses the software at the back end, that is, in the way of primary compression, avoiding secondary compression of image data to ensure the clarity of images ; Upload two image signals at the same time to ensure the reliability of image acquisition by the remote image monitoring system of cascade hydropower station groups to the image monitoring system of each hydropower station.

In the aforementioned cascade hydropower station group joint optimization control system, the electric energy metering system adopts an open, networked, and function-distributed architecture, including the main station of the electric energy metering system, electric energy collection devices, and electric energy meters at metering points. The electric energy collection device is connected with the main station of the electric energy metering system through the PCM through the optical fiber channel and through the Modem pool through the telephone channel. The number of energy meters at metering points is very large, and it is required to be stable and reliable in operation, high in precision, long in service life, reliable in communication, and easy to install and maintain. The data collected by the energy meters include: forward active power, reverse active power, forward reactive power, Events such as reverse reactive time-sharing electric energy meter code, maximum demand and occurrence time, instantaneous power, instantaneous voltage and current of each phase, and ammeter loss of voltage alarm. After the electric energy collection device collects the meter code value from the electric energy meter of each metering point, the main station of the electric energy metering system collects data from the electric energy system of each hydropower station according to the IEC870-5-102 protocol. The main station of the electric energy metering system can be composed of one or multiple computers and peripherals forming a network, responsible for managing the entire system, sending various instructions for data collection, storage, analysis, and management through the communication network; reading and receiving electric energy meters at regular intervals or at any time The power data, set the communication parameters and operating parameters for the concentrator, and after networking with the power business network of the power supply company, functions such as power energy calculation, bill printing, and statistical reports can be realized.

The communication system for electric energy collection and management of hydropower stations can generally be divided into three levels:

(1) System application layer, based on the data transmission platform to establish an electric energy collection system, or load monitoring system, GSM/SMS SMS meter reading software, etc., to realize the seamless combination of multiple systems;

(2) Network transport layer, responsible for processing various communication channels, including wireless GPRS/CDMA, wired PSTN telephone, 230M wireless private network, GSM mobile, China Unicom SMS gateway, which can convert various communication channels into a unified network communication channel , thus simplifying the complex application of different channels;

(3) The data transmission layer establishes an electric energy data transmission service center to provide customers with a unified communication interface, and the customer application system uses this interface to send and receive data.

In the aforementioned cascade hydropower station group joint optimization control system, each cascade hydropower station is equipped with a fire monitoring system that communicates asynchronously with the computer monitoring system, and is used as a detector (smoke, temperature, infrared flame, ultraviolet, cable temperature sensor) When a fire is detected, it will automatically send an alarm to the centralized alarm controller in the central control room through the system bus. After the centralized alarm controller receives the alarm, after information processing, the alarm controller displays the location of the fire in digital display mode, and through the serial communication interface, it automatically displays the location of the fire on the CRT of the fire monitoring system of the hydropower station. The part number and the floor plan of the floor indicate the fire handling measures. At the same time, according to the part where the fire occurs, after confirmation and delay, the fire prevention and smoke exhaust equipment and fire extinguishing equipment of the part and related parts are automatically or manually checked. Corresponding control, implementation of fire extinguishing and other measures. All fire information is sent to the computer monitoring system after information processing by the host computer of the fire monitoring system of the hydropower station. At the same time, the system can realize the control of ventilation, fire prevention and smoke exhaust equipment, carbon dioxide fire extinguishing system and water spray fire extinguishing system.

Compared with the prior art, the present invention divides the system into 3 safety areas based on the principle of "safe partition, dedicated network, horizontal isolation, and vertical authentication", remote centralized monitoring system, water transfer automation system, electric energy metering system and remote Horizontal isolation and vertical authentication between image monitoring systems, sub-systems are set up in each cascade hydropower station, and a dedicated network is used to communicate with the centralized control center, which can improve the security of the system's network and data transmission, realize centralized and unified management and scheduling, and reduce management It is a complete cascade large-scale hydropower station group joint optimization control automation system for multiple adjustment performances.

The remote centralized monitoring system has the functions of telemetry, remote control, remote signaling, and remote adjustment (that is, "four remotes"); developed data communication software compatible with computer monitoring systems from different manufacturers, and realized seamless connection between systems from different manufacturers. DL476-92 communication protocol's communication data packet length, permanent link, and command anti-calibration mechanism have been studied and optimized to ensure the real-time performance of massive information transmission of each power station and the security of remote control commands. Optimize control priority and system backup functions.

The water transfer automation system requires system information such as computer monitoring, electric energy, satellite cloud images, weather forecasts, and short-term flood forecasts of each cascade hydropower station. The powerful middleware technology is adopted in the data exchange process between the system and the external network, which makes the data exchange stable and reliable, and ensures the stable operation of the system. The transparent monitoring method without IP address is adopted to completely cut off the TCP connection, realizing reliable security isolation, and rationally planning the internal and external network functions of water regulation. A small computer cluster system is selected as the reservoir dispatching information processing server to realize the synchronous processing of massive data of cascade reservoir dispatching. Relying on the water dispatching automation system, it is possible to realize the joint optimal dispatch of the cascade hydropower station group, optimize the operation mode of each hydropower station, reduce the water consumption rate of the unit for power generation, reduce water abandonment, and increase power generation; real-time monitoring of water regime changes in the basin, and forecasting of the water regime in the basin According to the changing trend of the power market, make a reasonable and scientific dispatching plan to obtain the maximum power generation benefit; optimize the operating conditions of the generator sets of each power plant in real time, prolong the life of the unit, and improve the operating efficiency of the equipment; reduce dispatching management staff , improve work efficiency; it can provide real-time analysis and decision-making basis for the designated dispatching plan for enterprise managers and dispatching managers, improve the rapid response ability of enterprises to changes in the power market, adapt to the commercial operation of the power market, and improve the competitiveness of cascade hydropower stations , At the same time, it also provides protection for the safety of people's life and property downstream.

The remote image monitoring system is an important means of modern management and monitoring. Its main purpose is to reflect the actual information of the monitored object in a timely and true and accurate manner, so as to provide a basis for decision-making. With the aid of the auxiliary monitoring function of the computer monitoring system, the monitoring personnel of each cascade hydropower station can safely control and operate the equipment after seeing the real situation, which can greatly improve the safety of remote operation of the equipment, the efficiency of production management and the level of automation. It plays a role of security to a certain extent.

The electric energy metering system is an automated system that integrates automatic energy collection, transmission, and statistical settlement to better serve the entire system.

Putting this system into the optimal dispatch of the cascade hydropower station group in the Wujiang River Basin has resulted in an annual optimization benefit of about 183.5 million yuan, which has achieved very large economic benefits.

Description of drawings

Fig. 1 is a system schematic diagram of an embodiment of the present invention;

Fig. 2 is a schematic diagram of the network structure of the remote centralized monitoring system of the embodiment of the present invention;

Fig. 3 is the structural representation of the automatic water adjustment system of the embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a remote image monitoring system according to an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of an electric energy metering system according to an embodiment of the present invention.

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

Detailed ways

Embodiment of the present invention: a cascade hydropower station group joint optimization control system, as shown in Figure 1, includes a remote centralized monitoring system, a water transfer automation system, an electric energy metering system, and a remote image monitoring system; area and management information area (safety area III), the production control area includes real-time control area (safety area I) and non-control area (safety area II); the remote centralized monitoring system in safety area I and the The water dispatching automation system is connected after safety isolation through a hardware firewall to realize logical isolation, message filtering and access control of the two areas; the water dispatching automation system is connected to the electric energy metering system located in the safety zone II through the RS232 serial port; The remote centralized monitoring system, water dispatching automation system, and electric energy metering system are all equipped with WEB publishing subsystems. The above-mentioned WEB publishing subsystems and remote image monitoring systems are all located in the security zone Ⅲ. The WEB publishing subsystem communicates with the remote The image monitoring system is connected; the production control area and the management information area are equipped with a special one-way safety isolation device for electric power to realize physical isolation. The system has been put into use in the cascade hydropower station group in the Wujiang River Basin.

As shown in Figure 2, the seven cascade hydropower stations (power stations at the centralized control level) of Hongjiadu, Dongfeng, Suofengying, Wujiangdu, Goupitan, Silin, and Shatuo in the Wujiang River Basin are all equipped with computer monitoring systems. The remote centralized monitoring system adopts two mutually redundant economic dispatching server hosts, two redundant real-time data servers and two redundant historical data servers on the centralized control side, aiming at the centralized control dispatching data network of 7 centralized control level power stations Connect to the power data network and satellite channel, realize the dual network and satellite channel routing function of the power data network through the centralized control dispatching data network, and realize the connection of data transmission between the remote centralized monitoring system of the cascade hydropower station group and the computer monitoring system of each cascade hydropower station . With the application of multimedia technology in hydropower stations, voice, animation, visualization, and video functions are applied to computer monitoring systems to better understand the monitoring situation of hydropower stations. Among them, according to the role of computers in the monitoring system of hydropower stations and their relationship with conventional monitoring equipment, there are generally three modes as follows: 1) Conventional control equipment as the main, computer as a supplement; 2) Computer as the main, conventional control equipment Supplementary; 3) cancel the full computer monitoring system of conventional control equipment. According to the installed capacity of the hydropower station, its role in the power grid and their specific conditions, different monitoring systems can be selected. Generally, newly-built power stations and power stations with conditions (capital, technology and power generation permits, etc.) are suitable to choose the third mode, so as to achieve the goal of one-step completion. For the transformation of old-fashioned hydropower stations limited by other conditions, the first and second modes can be considered as transitions.

Each cascade hydropower station is equipped with a fire monitoring system that communicates asynchronously with the computer monitoring system. The system bus automatically sends an alarm to the centralized alarm controller in the central control room. After the centralized alarm controller receives the alarm, after information processing, the alarm controller displays the location of the fire in digital display mode, and through the serial communication interface, it automatically displays the location of the fire on the CRT of the fire monitoring system of the hydropower station. The part number and the floor plan of the floor indicate the fire handling measures. At the same time, according to the part where the fire occurs, after confirmation and delay, the fire prevention and smoke exhaust equipment and fire extinguishing equipment of the part and related parts are automatically or manually checked. Corresponding control, implementation of fire extinguishing and other measures. All fire information is sent to the computer monitoring system after information processing by the host computer of the fire monitoring system of the hydropower station. At the same time, the system can realize the control of ventilation, fire prevention and smoke exhaust equipment, carbon dioxide fire extinguishing system and water spray fire extinguishing system.

As shown in Figure 3, the water regulation automation system is mainly divided into water regulation internal network and water regulation external network, database cluster, satellite terminal, GSM terminal, serial port server, optimization computing server, application server and functions of scheduling, consultation, training, Clients for maintenance and other functions are all located in the internal network of the water regulation; the database and communication server, WEB server, and satellite cloud image server are located in the external network of the water regulation; there are forward and reverse isolation devices between the internal and external networks of the water regulation, and the water regulation Both internal and external networks are equipped with forward and reverse gateways. Its main functions include: real-time data collection and processing, real-time monitoring, basic information query and maintenance, medium and long-term forecasting subsystem, real-time flood forecasting, flood control scheduling, power generation scheduling, flood control and power generation scheduling consultation, and water management. It includes data subsystem, model subsystem and decision-making and information service subsystem; among them,

(1) The data subsystem includes the following three levels:

1) The information receiving and processing layer is used to complete the receiving and processing of various basic information;

2) The basic database layer is responsible for recording, storing and managing various basic information data;

3) Dedicated database layer, used to establish various special databases, so as to ensure that the application software of multiple developers will not cause damage to the basic database, and ensure the openness and scalability of the system;

(2) The model subsystem includes models and algorithms for forecasting and scheduling decision support;

(3) The decision-making and information service subsystem is based on the database and model library, and establishes and develops an advanced consultation application system to realize reservoir scientific forecasting and scheduling decision-making; establish a public information query and water transfer business management system to realize information sharing and improve Office automation level; through the man-machine interface to control the call of each module in the form of menu, window and dialog box.

Each cascade hydropower station (Hongjiadu, Dongfeng, Suofengying, Wujiangdu, Goupitan, Silin, Shatuo) is equipped with an automatic water regime forecasting system, and the telemetry information generated by the water regime automatic forecasting system is passed by Inmarsat_C, VHF , GSM, optical fiber and VSAT satellite communication methods to form a mixed networking channel, which is transmitted to the water dispatching automation system.

The water regime automatic monitoring and reporting system includes telemetering stations, information transmission channels and central control stations (abbreviated as central stations). Set up 134 telemetry stations in the Wujiang River Basin. The telemetry stations are used to automatically collect real-time telemetry information of rainfall, water level, equipment voltage and ambient temperature. The instruments and equipment of the telemetry stations include rain gauges, water level gauges, encoders, digital transmitters, and radio stations. And power supply equipment, etc., are generally carried out under the condition that someone manages and no one operates. Under the control of the central station, the telemetry information is compiled into a pulse signal, and transmitted to the central station through an information transmission channel; the information transmission channel includes two methods: wired and wireless. The function of the central station is to collect the hydrological data of each telemetry station in the telemetry system, carry out calculation and arrangement, make flood forecast in time, and control the opening and closing of gates, and carry out water conservancy dispatching; the main equipment of the central station includes communication stations and electronic computers, etc. Generally, small and medium microcomputers are used, and peripherals such as monitors, wide-line printers, and disk drives are configured.

As shown in Figure 4, Wujiangdu and Dongfeng adopt the image monitoring system provided by Beijing Mingpeng Electric Power Equipment Co., Ltd., the front end adopts American pelco9740 video matrix controller, and the back end adopts AXIS 2401 image encoder; Suofengying and Hongjiadu The image monitoring system provided by Zhejiang Dahua Company is adopted. The front end also adopts the American pelco9760 video matrix controller, and the rear end adopts APELCO NET4001A series IP video codec. Each hydropower station of the cascade hydropower station group adopts different image monitoring systems, so the remote image The monitoring system center must integrate image monitoring systems from different manufacturers.

In order to solve the above problems, the image monitoring system of each hydropower station is equipped with protocol conversion equipment, and the collected images are compressed by MPEG4 standard, so that the collected images can be transmitted to the remote image monitoring system through a 2M dedicated transmission circuit. The image monitoring system of each hydropower station adopts IP protocol and multicast mode to transmit images and other related data, and decompresses the software at the back end, that is, in the way of primary compression, avoiding secondary compression of image data to ensure the clarity of images ; Upload two image signals at the same time to ensure the reliability of image acquisition by the remote image monitoring system of cascade hydropower station groups to the image monitoring system of each hydropower station.

As shown in Figure 5, the electric energy metering system adopts an open, networked, and function-distributed architecture, including the main station of the electric energy metering system, electric energy collection devices, and electric energy meters at metering points. The electric energy collection devices of cascade hydropower stations pass through The PCM is connected with the main station of the electric energy metering system through the optical fiber channel and the modem pool through the telephone channel. The number of energy meters at metering points is very large, and it is required to be stable and reliable in operation, high in precision, long in service life, reliable in communication, and easy to install and maintain. The data collected by the energy meters include: forward active power, reverse active power, forward reactive power, Events such as reverse reactive time-sharing electric energy meter code, maximum demand and occurrence time, instantaneous power, instantaneous voltage and current of each phase, and ammeter loss of voltage alarm. After the electric energy collection device collects the meter code value from the electric energy meter of each metering point, the main station of the electric energy metering system collects data from the electric energy system of each hydropower station according to the IEC870-5-102 protocol. The main station of the electric energy metering system can be composed of one or multiple computers and peripherals forming a network, responsible for managing the entire system, sending various instructions for data collection, storage, analysis, and management through the communication network; reading and receiving electric energy meters at regular intervals or at any time The power data, set the communication parameters and operating parameters for the concentrator, and after networking with the power business network of the power supply company, functions such as power energy calculation, bill printing, and statistical reports can be realized.

The communication system for electric energy collection and management of hydropower stations can generally be divided into three levels:

(1) System application layer, based on the data transmission platform to establish an electric energy collection system, or load monitoring system, GSM/SMS SMS meter reading software, etc., to realize the seamless combination of multiple systems;

(2) Network transport layer, responsible for processing various communication channels, including wireless GPRS/CDMA, wired PSTN telephone, 230M wireless private network, GSM mobile, China Unicom SMS gateway, which can convert various communication channels into a unified network communication channel , thus simplifying the complex application of different channels;

(3) The data transmission layer establishes an electric energy data transmission service center to provide customers with a unified communication interface, and the customer application system uses this interface to send and receive data.

Claims (8)

1. The utility model provides a step hydropower station group unites optimization regulation and control system which characterized in that: the system comprises a remote centralized monitoring system, a water regulation automation system, an electric energy metering system and a remote image monitoring system; the remote centralized monitoring system is connected with the water dispatching automation system after being safely isolated by a hardware firewall, so that the logical isolation, the message filtering and the access control of two areas are realized; the water regulation automation system is connected with the electric energy metering system through an RS232 serial port; the remote centralized monitoring system, the water dispatching automation system and the electric energy metering system are all provided with a WEB release subsystem, and the WEB release subsystem is connected with the remote image monitoring system through a router with a firewall.

2. The cascaded hydropower station group combined optimization and regulation system according to claim 1, wherein: each cascade hydropower station is provided with a computer monitoring system, and data transmission between the remote centralized monitoring system of the cascade hydropower station group and the computer monitoring system of each cascade hydropower station is realized by adopting a redundant data transmission channel combining SDH optical fiber communication and satellite communication.

3. The cascaded hydropower station group combined optimization and regulation system according to claim 1, wherein: the water dispatching automation system comprises a data subsystem, a model subsystem and a decision and information service subsystem; wherein,

(1) The data subsystem includes:

1) the information receiving and processing layer is used for receiving and processing various basic information;

2) the basic database layer is used for recording, storing and managing various basic information data;

3) the special database layer is used for establishing various special databases;

(2) the model subsystem comprises a model and an algorithm which are supported by forecasting and scheduling decisions;

(3) the decision and information service subsystem establishes and develops a high-level consultation application system and a public information and water dispatching service management system on the basis of a database and a model library.

4. The cascaded hydropower station group combined optimization and regulation system according to claim 1, wherein: each hydropower station of the cascade is provided with an automatic water regime measuring and reporting system, and telemetering information generated by the automatic water regime measuring and reporting system is transmitted to the automatic water regulation system through a mixed networking channel formed by Inmarsat _ C, VHF, GSM, optical fibers and VSAT satellite communication modes.

5. The cascaded hydropower station group joint optimization regulation and control system of claim 4, wherein: the automatic water regime measuring and reporting system comprises a remote measuring station, an information transmission channel and a central control station; the remote sensing station is used for automatically acquiring real-time remote sensing information of rainfall, water level, equipment voltage and environment temperature, and the remote sensing information is organized into pulse signals under the control of the central station and is transmitted to the central station through an information transmission channel; the information transmission channel adopts a wired or wireless mode.

6. The cascaded hydropower station group combined optimization and regulation system according to claim 1, wherein: protocol conversion equipment is arranged in the image monitoring system of each hydropower station of the cascade, and the acquired images are compressed by adopting the MPEG4 standard, so that the acquired images are transmitted to the remote image monitoring system through a 2M special transmission circuit.

7. The cascaded hydropower station group combined optimization and regulation system according to claim 1, wherein: the electric energy metering system comprises an electric energy metering system main station, an electric energy acquisition device and metering point electric energy meters, wherein the electric energy acquisition device acquires meter code values from each metering point electric energy meter and is connected with the electric energy metering system main station through an optical fiber data network and an electric power telephone network.

8. The cascade hydropower station group joint optimization regulation and control system according to claim 1 or 2, wherein: and each hydropower station of the cascade is provided with a fire-fighting monitoring system which is in asynchronous communication with the computer monitoring system, and when the detector detects a fire, the fire information is processed by a host of the fire-fighting monitoring system of the hydropower station and then is sent to the computer monitoring system.

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