CN110460074A - An integrated management and control system for an energy storage power station - Google Patents

Abstract

The invention discloses a comprehensive management and control system for an energy storage power station, comprising: a power station monitoring host, a power station monitoring backup machine and n local monitors; the n local monitors collect detailed information of local equipment in the monitored area, and Perform on-site storage; data exchange between n on-site monitoring and power station monitoring hosts and on-site equipment directly through the 61850 communication protocol; power station monitoring hosts and monitoring standby machines conduct data exchange with on-site monitoring through the Ethernet SOA service bus, The user can access the on-site monitoring screen and database on demand through the power station monitoring host, so as to realize the access and monitoring of the detailed data of the on-site equipment. The invention realizes full data storage, rapid centralized and stable control and remote real-time monitoring of the energy storage power station, ensures the simplification, smoothness and stability of the entire secondary network of the energy storage power station, and solves the core of data storage and real-time control of the energy storage power station. contradiction.

Description

An integrated management and control system for an energy storage power station

technical field

The invention relates to the technical field of power system monitoring, in particular to an integrated management and control system for an energy storage power station.

Background technique

Energy storage is an important part and key supporting technology of smart grids, energy systems with a high proportion of renewable energy, and energy Internet. With the rapid development of the energy storage industry in recent years, energy storage power stations have played an increasingly important role in the power supply side, grid side and load side of the power system. The energy storage system mainly includes monitoring and energy management system (EMS), power conversion system (PCS) and battery storage system (BMS). Among them, the integrated management and control system of the energy storage power station is the brain and interaction center of the energy storage system. It is responsible for the information exchange and scheduling and maintenance operations of users, and is responsible for the charge and discharge management and safety monitoring of the entire energy storage system. , is one of the core key technologies of the energy storage system.

Most of the data in the energy storage power station comes from the BMS, while a large amount of data is non-critical operation and maintenance data. Taking the BMS data of a 1MWh lithium iron phosphate battery as an example, the total amount of BMS data is 11,174, while the key data is only 154. According to the calculation of 20MW/40MWh of conventional medium-scale energy storage stations, the BMS data points of the whole station are about 450,000 points. If PCS equipment and primary and secondary equipment of the whole station are added, the data points are about 460,000 points. Far beyond the data scale of 500kV substations in the power system, conventional monitoring technology cannot meet the needs of practical applications in the field. At present, the existing large-scale energy storage power stations have reached one million levels of information on single battery cells. Therefore, the monitoring platform needs to manage and monitor these energy storage devices in an orderly manner, and the communication and control of the entire power station monitoring system is The system puts forward higher requirements.

The Integrated Management and Control System (IMMS) of energy storage power station is specially developed by NARI Group for energy storage power station. In view of the large amount of data and many control instructions of energy storage power station, it proposes a centralized control system based on hierarchical data storage and energy management. The system architecture of remote access with SOA realizes full data storage, rapid centralized and stable control and remote real-time monitoring of the power station.

As a new energy form emerging in recent years, energy storage power station has the characteristics of huge data, high control precision and fast response speed. higher requirement.

The patent application with the application number of 201410724747.1 proposes to configure a dedicated embedded control host in the monitoring system of the battery energy storage station. The monitoring system network of the battery energy storage station is divided into independent control network and monitoring network.

The patent application with the application number of 201410777996.7 provides a data classification module of an energy storage system, and the data classification module is connected to a protocol application module. From the communication protocol level, the battery cell information of the energy storage power station is separately processed to ensure the integrity of the large-scale energy storage battery information. By classifying and processing all monitoring information of the energy storage power station, the communication between the classified information does not affect each other. , which increases the stability of the monitoring system.

The patent application with the application number of 201410724747.1 proposes to configure a dedicated embedded control host in the monitoring system of the battery energy storage station, and divide the monitoring system network of the energy storage station into independent control network and monitoring network. This method can only monitor a single battery energy storage system with a capacity of 500kW and above. In the face of the current medium and large-scale energy storage stations with dozens of MWh and hundreds of MWh, it cannot be effectively monitored. At the same time, due to the addition of a dedicated embedded host, the monitoring network is divided into independent control network and monitoring network, which makes the network structure too complicated, introduces fault points, increases the design difficulty and engineering cost.

The patent application with the application number of 201410777996.7 provides a data classification module of an energy storage system, and the data classification module is connected to a protocol application module. However, compared with the existing IEC61850 standard protocol for smart substations, as a non-standard communication protocol, it is difficult to be compatible with other equipment in communication, and it is difficult to be promoted at the engineering application level.

SUMMARY OF THE INVENTION

Aiming at the characteristics of large amount of data and many control instructions in energy storage power stations, a system architecture based on hierarchical data storage, centralized energy management control and SOA remote access is proposed, which realizes full data storage, rapid centralized and stable control and remote real-time access of power stations. monitor. The technical problem to be solved by the present invention is to provide an integrated management and control system for an energy storage power station, which realizes full data storage, fast centralized and stable control and remote real-time monitoring of the power station, and ensures the simplification and smoothness of the entire secondary network of the energy storage power station. and stability, which solves the core contradiction between storage and real-time control of energy storage power station data.

In order to solve the above technical problems, the present invention provides an integrated management and control system for an energy storage power station, including: a power station monitoring host, a power station monitoring backup machine, and n local monitors; The detailed information is stored on-site; data is directly exchanged between n local monitoring and power station monitoring hosts and on-site equipment through the 61850 communication protocol; Monitoring and data interaction, users can access the on-site monitoring screen and database on demand through the power station monitoring host to realize the viewing and monitoring of detailed data.

Preferably, it also includes a remote motor and a remote dispatch, and the remote motor transfers the data of the energy storage power station to the remote dispatch through the 104 communication protocol.

Preferably, the power station monitoring host also includes an energy management software module, which integrates AGC, AVC and EMS modules.

Preferably, the SOA service bus is based on the "CIM/G, DL476" standard protocol, and with the help of the existing Ethernet network, the integration and unification of the 61850 data communication network and the SOA service network is realized. The screen and database of the local monitoring can be used to realize the viewing and monitoring of the detailed data.

Preferably, the n local monitors use IEC61850 model scd files to complete the model storage, the power station monitoring host establishes a communication link with the n local monitors, and the power station monitoring host initiates a remote access service request, through the remote access process through the SOA service bus Obtain the graphic files and real-time data of the screen at the factory site, and view the screen data of n local monitoring hosts in real time.

The beneficial effects of the present invention are as follows: the present invention adopts the unified IEC61850 communication protocol, and develops a comprehensive management and control system for energy storage power stations based on big data layered storage, energy management centralized control, and remote access technology, and the system realizes The full data storage, fast centralized and stable control and remote real-time monitoring of the power station ensure the simplification, smoothness and stability of the entire secondary network of the energy storage power station, and solve the core contradiction between data storage and real-time control of the energy storage power station. The energy storage monitoring system has obvious advantages, not only can it be applied to independent peak regulation and frequency regulation energy storage power stations; it can also be applied to energy storage power stations in the microgrid, as well as the monitoring system of the entire microgrid; When the power station cluster is connected, it can also act as a remote dispatcher.

Description of drawings

FIG. 1 is a schematic diagram of a layered architecture of the present invention.

FIG. 2 is a schematic structural diagram of an energy management EMS centralized control module of the present invention.

FIG. 3 is a schematic structural diagram of a remote access function module of the present invention.

Detailed ways

As shown in Figure 1, an integrated management and control system for an energy storage power station includes: a power station monitoring host, a power station monitoring backup machine, and n local monitors; n local monitors collect detailed information of local equipment in the monitored area , and perform on-site storage; data exchange between the power station monitoring host, power station monitoring standby machine, and n on-site monitoring and on-site devices is carried out through the 61850 communication protocol; Monitoring and data interaction, users can access the on-site monitoring screen and database on demand through the power station monitoring host to realize the viewing and monitoring of detailed data. It also includes remote motive and remote dispatch. The remote motive transfers the data of the energy storage power station to the remote dispatch through the 104 communication protocol.

The IMMS distributed system architecture is divided into two levels: power station monitoring host and local monitoring. On-site monitoring collects the detailed information of on-site equipment (including PCS, BMS, etc.) in the monitored area (single warehouse, or several units), and stores it on-site; the protection control between on-site equipment and power station monitoring host is the key information, interact directly with the 61850 data main network. The power station monitoring host exchanges data with the local monitoring through the SOA service bus, and the user can access the on-site monitoring screen and database on demand at the monitoring main station, so as to realize the viewing and monitoring of the detailed data.

The IMMS distributed system architecture is recommended to be used in medium and large-capacity energy storage power stations. It solves the contradiction between full data monitoring and key data optimization of large-scale energy storage power stations. While realizing full data monitoring and storage, it reduces the burden of monitoring hosts and key data networks, and improves the operational efficiency and reliability of energy storage monitoring. Recommended application range of IMMS distributed architecture: applications with capacity ≥ 10MWh; data volume ≥ 100,000.

As shown in Fig. 2, energy management (EMS) is an important software module. The present invention adopts the concept of modular programming and integrates modules such as AGC, AVC, and EMS. By accepting remote commands, local commands or planning curves, etc., real-time monitoring of the safety information boundary of the battery, real-time control of the power output of the energy storage converter (PCS), and safe and stable operation of the entire energy storage power station. In addition, the system can realize the SOC maintenance function of the battery system; participate in special functions such as power grid frequency regulation, balanced power output, planning curve, electricity price management, etc. application.

The IMMS adopts the unified control of remote commands and local commands, and realizes remote/local mode management through switching logic; unified command control realizes the coupling of power station fault blocking (including battery SOC fault) and AGC commands. Energy management is mainly divided into active power control and reactive power control. Based on the model of multiple grid connection points and single grid connection point, the commands are subdivided uniformly. At the same time, IMMS supports generation plan curve mode and local plan curve input mode.

As shown in Figure 3, based on the SOA service bus, the IMMS on-site monitoring and the master station can realize the remote access function without the need for a protocol. The SOA service bus is based on the "CIM/G, DL476" standard protocol, and realizes the functions of security authentication, screen acquisition and data refresh.

The local device IEC61850 model scd file that realizes remote access completes the model storage, the master station establishes a communication link with the local monitoring, the master station initiates a remote access service request, and obtains the plant-side graphics through the SOA service bus through the remote access process. Real-time data of files and pictures, real-time viewing of the picture data of the local monitoring host. While completing the full data storage of the power station and the rapid control of core data, it ensures the streamlining, smoothness and stability of the entire secondary network of the energy storage power station, and solves the core contradiction between data storage and real-time control of the energy storage power station.

Because IMMS is based on NARI NS5000 intelligent substation monitoring technology platform, it not only supports remote access between energy storage power station monitoring and local monitoring, but also supports remote access between remote dispatch master station and energy storage power station monitoring through reasonable configuration. When multiple energy storage power station clusters are connected, the present invention can also act as a remote dispatching role.

In view of the huge amount of data in the energy storage power station and the need for rapid control, there is a contradiction between its full data storage and the rapid control of core data. In order to avoid the occurrence of a large amount of operation and maintenance data occupying the valuable real-time data network, for different application scenarios, the present invention adopts the unified IEC61850 communication protocol. The integrated management and control system of energy storage power station with centralized control of energy management and remote access technology. This system realizes full data storage, fast centralized and stable control and remote real-time monitoring of the power station, ensuring the simplification and smoothness of the entire secondary network of the energy storage power station. and stability, which solves the core contradiction between storage and real-time control of energy storage power station data.

Claims (5)

1. a kind of energy-accumulating power station comprehensive management and control system characterized by comprising monitoring power station host, monitoring power station are standby Machine and n monitor on the spot；N on the spot details of equipment on the spot in monitoring collection institute monitor area, and stored on the spot； N monitoring and monitoring power station host and between equipment directly carries out data interaction by 61850 communications protocol on the spot on the spot；Power station Monitoring host computer, monitoring standby host carry out data interaction by Ethernet SOA service bus and monitoring on the spot, and user passes through monitoring power station Host has access to the picture and database monitored on the spot on demand, realizes and monitors to the access of detailed data.

2. energy-accumulating power station comprehensive management and control system as described in claim 1, which is characterized in that further include telecontrol device and remote Energy-accumulating power station data are given to remote dispatching by 104 communications protocol by side's scheduling, telecontrol device.

3. energy-accumulating power station comprehensive management and control system as described in claim 1, which is characterized in that monitoring power station host also wraps Energy management software module is included, AGC, AVC and EMS module are integrated with.

4. energy-accumulating power station comprehensive management and control system as described in claim 1, which is characterized in that SOA service bus with " CIM/G, DL476 " standard agreement is technical foundation, realizes that 61850 data communication networks and merging for SOA service network are unified, user The picture and database monitored on the spot can be had access on demand by monitoring power station host, realize and the access of detailed data is monitored.

5. energy-accumulating power station comprehensive management and control system as described in claim 1, which is characterized in that n monitoring uses on the spot IEC61850 model scd file completes model storage, and monitoring power station host and n monitor on the spot establishes communication linkage, power station prison Control host initiation remotely has access to service request, by remotely having access to graphic file of the process through SOA service bus acquisition plant stand end With picture real time data, the picture data of a monitoring host computer on the spot of real time inspection n.