CN110380516B - Energy storage power station PCS high-synchronization concurrent group control method - Google Patents
Energy storage power station PCS high-synchronization concurrent group control method Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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Abstract
The invention discloses a high-synchronization concurrent group control method for a PCS (power distribution system) of an energy storage power station, which comprises the following steps of: (1) hardware configuration; (2) operating system configuration; (3) installing platform software of the energy storage monitoring system; (4) mounting and communication debugging the energy storage converter PCS; (5) and high concurrent group control of multiple PCS. The beneficial effects of the invention are as follows: on the premise of ensuring the network bearing capacity and the host performance, the invention sends the data in a set; the total-station random converter is simple in structure and low in construction cost through a uniform 61850 protocol; the three-in-one network has no increase of network cost, the dynamic control speed is less than 20ms, and the total station control rate is high.
Description
Technical Field
The invention relates to the technical field of monitoring of new energy storage power stations, in particular to a PCS high-synchronization concurrent group control method for an energy storage power station.
Background
With the expansion of new energy power generation and grid-connected scale, the energy storage technology develops rapidly. The energy storage power station can provide active and reactive support for a power grid, the accepting capacity of a power distribution network to a distributed power source is enhanced, and a huge effect is played in the construction of a smart power grid. The energy storage power station monitoring system realizes dispatching communication and local man-machine interaction on one hand, is responsible for controlling all energy storage converters (PCS) in a power station on the other hand, and is one of key technologies of energy storage.
In a high-capacity energy storage power station, the number of core controlled object energy storage converters (PCS) is large, and the power response characteristic of the whole energy storage power station is directly influenced by the synchronism of control instructions of a plurality of PCS. The existing PCS control uses an independent sequential control technology, and the control of a plurality of PCS is finished one by one respectively, so that the control output time is prolonged, and the adverse effect on the alternating current grid-connected output power of the energy storage power station is generated.
The existing energy storage power station PCS control mode mostly adopts an independent control mode, so that the efficiency is influenced while the reliability is ensured. The real-time PCS control of the energy storage power station can only ensure that a local time section is optimal, but cannot ensure that the effect of fluctuation of an active power difference is absorbed in the whole time period, and the conventional scheduling control mode is shown in figure 1. The individual control of a plurality of PCS requires not only command time but also execution time, and the output power rises in a trapezoidal manner, and cannot reach the rated power output in a short time.
The existing energy storage power station has a complex structure: a complete set of monitoring operating system and energy storage device is required, and configuration by professional personnel is required. Because the technology is complex, the traditional control mode has complicated and non-uniform application protocols, and the total-station synchronous control can be successful after a large amount of joint debugging in the early stage. The existing energy storage power station PCS control mode mostly adopts a single control mode, PCS response time is delayed, and fluctuation influence is generated on grid-connected power of the energy storage power station.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-synchronization concurrent group control method for a PCS (power distribution system) of an energy storage power station, which has the advantages of simple structure, lower construction cost and higher total station control rate, and can transmit data in a data set on the premise of ensuring the network bearing capacity and the host performance.
In order to solve the technical problem, the invention provides a high-synchronization concurrent group control method for a PCS (power distribution system) of an energy storage power station, which comprises the following steps:
(1) hardware configuration;
(2) operating system configuration;
(3) installing platform software of the energy storage monitoring system;
(4) mounting and communication debugging the energy storage converter PCS;
(5) and high concurrency group control of multiple PCS.
Preferably, in the step (1), a main network of the system adopts a single/double 10/100M Ethernet structure, and the SCADA function adopts double-machine hot standby to complete a network data synchronization function; other main network nodes operate in a dual-node standby mode or a multi-node standby mode; the hardware configuration of the monitoring system is specifically as follows: the two station layer monitoring hosts are communicated with the PCS of the n energy storage power stations through a 61850 communication protocol, and are used for acquiring data and issuing instructions; the two telemechanical machines synchronize the monitoring data of the two station layer monitoring hosts and send the monitoring data to the master station through a 103 communication protocol, so that a scheduling unit can conveniently monitor and schedule the monitoring data.
Preferably, in the step (2), the operating system configuration specifically includes: the energy storage monitoring platform based on the 61850 communication architecture supports a plurality of Linux operating systems such as reddat and Debian; the database system adopts a basic binary file library, an SQLite or other commercial databases specified by a user; the system adopts an object-oriented programming method and adopts Visual C + +, GCC, Qt and JAVA development environments.
Preferably, in the step (3), the installation of the platform software of the energy storage monitoring system specifically comprises: the computer monitoring system provides a set of real-time database management system to provide rapid real-time data access, the real-time database management system has a distributed network function and a Client/Server mode, and can manage the distributed databases of the whole network and protect the consistency of the data of the whole network; the real-time database management system is designed in an object-oriented mode and has Client/Server and Producer/Consumer modes.
Preferably, in the step (4), the energy storage converter PCS installation and communication debugging specifically comprises: the communication between the PCS and the monitoring background is carried out through IEC61850, and the communication program is communicated and then information is sent to the main station; the real-time communication bus is based on a TCP/UDP communication technology, and realizes high-speed sharing of information in the system by providing a standard interface.
Preferably, in the step (5), the high concurrent group control of multiple PCS specifically includes: the group control instruction is based on a 61850 communication protocol and is completed through a fixed downward communication program according to the configuration file; dispatching gives peak-shaving and valley-shaving instructions to the energy storage power station, the energy storage power station monitoring background gives high concurrent instructions to multiple PCS through a 61850 communication protocol, and rapidly increases/decreases power through a group control mode; after the instruction is issued, the output power of the grid-connected energy storage power station is detected through the measurement and control protection device, compared with the instruction requirement, and issued again after the group control instruction is adjusted, so that the output power load requirement is ensured.
The invention has the beneficial effects that: on the premise of ensuring the network bearing capacity and the host performance, the invention sends the data in a set; the total-station random converter is simple in structure and low in construction cost through a uniform 61850 protocol; the three-in-one network has no increase of network cost, the dynamic control speed is less than 20ms, and the total station control rate is high.
Drawings
Fig. 1 is a schematic diagram of an existing energy storage power station operation scheduling.
Fig. 2 is a schematic diagram of the group control strategy according to the present invention.
Fig. 3 is a schematic diagram of the distribution of the energy storage power station communication architecture of the present invention.
Fig. 4 is a schematic diagram of a group control process according to the present invention.
Detailed Description
A high-synchronization concurrent group control method for a PCS (Power System) of an energy storage power station comprises the following steps:
the method comprises the following steps: and (4) hardware configuration. The system main network adopts a single/double 10/100M Ethernet structure and adopts an international standard network protocol. The SCADA function adopts dual-computer hot standby to complete the network data synchronization function. And other main network nodes select a dual-node standby mode or a multi-node standby mode to operate according to importance and application requirements. The hardware configuration of the monitoring system comprises a SCADA service station, an operator workstation, a preposed communication workstation, a data gateway machine and the like. The specific architecture diagram is shown in fig. 3. The two station layer monitoring hosts are communicated with the PCS of the n energy storage power stations through a 61850 communication protocol, and are used for acquiring data and issuing instructions; the two telemechanical machines synchronize the monitoring data of the two station layer monitoring hosts and send the monitoring data to the master station through a 103 communication protocol, so that a scheduling unit can conveniently monitor and schedule the monitoring data.
Step two: and (4) configuring an operating system. The high concurrency group control method is based on a 61850 communication framework energy storage monitoring platform and supports a plurality of Linux operating systems such as redhat and Debian. The database system may employ a basic binary library, SQLite, or other commercial database specified by the user. The system adopts an object-oriented programming method and adopts Visual C + +, GCC, Qt and JAVA development environments.
Step three: and installing platform software of the energy storage monitoring system. In order to meet the requirement of real-time performance, a computer monitoring system must provide a set of real-time database management system to provide rapid real-time data access, and the real-time database management system must have a distributed network function and a Client/Server mode, and can manage a whole network distributed database and protect the consistency of whole network data. The real-time database management system is designed to be object-oriented, has Client/Server and Producer/Consumer modes, has extremely fast real-time responsiveness, can well meet the real-time requirement of a power system, and is a network database management system which can manage all distributed databases distributed on each node in a network, so that the system can be flexibly configured and the functions can be randomly combined.
Step four: and (3) installing and debugging a power storage converter (PCS). And the PCS and the monitoring background communicate through IEC61850, and the communication program is communicated to send information to the main station. The real-time communication bus is based on a TCP/UDP communication technology, and realizes high-speed sharing of information in the system by providing a standard interface. The real-time communication bus shields the implementation details of the bottom layer communication socket and reduces the burden of a user. According to the requirements of an integrated platform, the real-time communication bus is in a one-to-one and one-to-many communication model.
Step five: and high concurrency group control of multiple PCS. The energy storage power station high-concurrency group control comprises wiring between the detection device and the energy storage grid-connected system, communication between the background and the main station, group communication between the PCS and the monitoring background and the like, and a plurality of PCS is a group control flow chart shown in figure 2. The group control instruction is based on a 61850 communication protocol and is completed through a fixed downward communication program according to a configuration file; dispatching gives peak-shaving and valley-shaving instructions to the energy storage power station, the energy storage power station monitoring background gives high concurrent instructions to multiple PCS through a 61850 communication protocol, and rapidly increases/decreases power through a group control mode; after the instruction is issued, the output power of the grid-connected energy storage power station is detected through the measurement and control protection device, the output power is compared with the instruction requirement, the group control instruction is adjusted and then issued again, and the output power load requirement is ensured.
The intelligent energy storage system based intelligent energy storage system regulation and control platform NS5000/IMMS has the characteristics of integrated management of a master station model and a slave station model and the like, and greatly improves the level of interaction with a dispatching master station and local monitoring. The energy storage system integrates an all-station Energy Management (EMS) module, comprises functions of AGC, AVC, SOC maintenance and the like, and is mainly used for energy storage application occasions such as power grid auxiliary services (peak regulation, frequency modulation and the like), new energy centralized grid connection, distributed power generation, micro-grids and the like.
The NS5000E/IMMS distributed system framework is suggested to be applied to medium and large capacity energy storage power stations, and solves the contradiction between full data monitoring and key data rapid control of large energy storage power stations. When the full data monitoring and storage are realized, the burden of a monitoring host and a key data network is reduced, and the operating efficiency and the reliability of energy storage monitoring are improved. Based on abundant industrial-level communication protocols and interfaces, comprehensive system integration can be realized, effective management and control are provided for an energy storage and microgrid system, an upper IEC104 protocol is supported, a station control layer is networked through an IEC61850 protocol, and a dual-machine dual-network mode is supported. The NS5000E/IMMS is based on an integrated platform, can integrate functions of scheduling interaction, PCS monitoring, BMS monitoring and maintenance, protection, measurement and control and metering device access, environment management, new energy expansion access and the like, and can be flexibly applied to various power system application occasions.
In a high-capacity energy storage power station, the number of core controlled object energy storage converters (PCS) is large, and the power response characteristic of the whole energy storage power station is directly influenced by the synchronism of control instructions of a plurality of PCS. NS5000E and IMMS realize the arrival synchronism of the group control instructions of multiple PCS (personal communications systems) in 5ms through a multi-thread synchronization concurrency technology compatible with a 61850 model; reasonable expenditure of platform resources is realized by starting and stopping intelligent management threads; the overall power output characteristic of the energy storage power station is ensured.
The high concurrency group control configuration is completed through an xml configuration file and is realized through a 61850 protocol, a group control flow chart is shown in fig. 4, and the specific configuration file format is as follows:
if the configuration file indicates that PCS1-PCS20 need synchronous group control, the IED names of the 20 devices are filled in the same group, and the control command of the group one is simultaneously issued to the 20 devices, so that the command and execution time required when the remote control command is independently issued are reduced. In the same way, a plurality of devices can be set into a plurality of group control groups, and the instructions are uniformly issued and uniformly executed to the lower programs through communication, so that the quick response capability of the energy storage power station PCS group is improved, and the stability of the output power is improved. The control command can be sent by an operation operator, and also can be sent automatically by an active automatic regulating function and a voltage reactive regulating function, or sent by remote dispatching.
Claims (1)
1. A high-synchronization concurrent group control method for a PCS (Power conversion System) of an energy storage power station is characterized by comprising the following steps:
(1) hardware configuration; the main network of the system adopts a single/double 10/100M Ethernet structure, and the SCADA function adopts double-machine hot standby to complete the network data synchronization function; other main network nodes operate in a dual-node standby mode or a multi-node standby mode; the hardware configuration of the monitoring system is specifically as follows: the two station layer monitoring hosts are communicated with the PCS of the n energy storage power stations through a 61850 communication protocol, and are used for acquiring data and issuing instructions; the two telecontrol machines synchronize the monitoring data of the two station-level monitoring hosts and send the monitoring data to the master station through a 103 communication protocol, so that a scheduling unit can conveniently monitor and schedule the monitoring data;
(2) operating system configuration; the energy storage monitoring platform based on the 61850 communication architecture supports a Linux operating system of reddat and Debian; the database system adopts a basic binary file library, an SQLite or other commercial databases specified by a user; the system adopts an object-oriented programming method and adopts Visual C + +, GCC, Qt and JAVA development environments;
(3) installing platform software of the energy storage monitoring system; the computer monitoring system provides a set of real-time database management system to provide rapid real-time data access, the real-time database management system has a distributed network function and a Client/Server mode, and can manage the distributed databases of the whole network and protect the consistency of the data of the whole network; the real-time database management system is designed in an object-oriented mode and has Client/Server and Producer/Consumer modes;
(4) mounting and communication debugging of the energy storage converter PCS; the communication between the PCS and the monitoring background is carried out through IEC61850, and the communication program is communicated and then information is sent to the main station; the real-time communication bus is based on a TCP/UDP communication technology, and realizes high-speed sharing of information in the system by providing a standard interface;
(5) high concurrent group control of multiple PCS; the group control instruction is based on a 61850 communication protocol and is completed through a fixed downward communication program according to a configuration file; dispatching gives peak-shaving and valley-shaving instructions to the energy storage power station, the energy storage power station monitoring background gives high concurrent instructions to multiple PCS through a 61850 communication protocol, and rapidly increases/decreases power through a group control mode; after the instruction is issued, the output power of the grid-connected energy storage power station is detected through the measurement and control protection device, the output power is compared with the instruction requirement, the group control instruction is adjusted and then issued again, and the output power load requirement is ensured.
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