CN111274303B - Real-time data modification interface method based on intelligent power grid dispatching technology system - Google Patents

Abstract

The real-time data modification interface method based on the intelligent power grid dispatching technology system comprises the following steps: step 1: setting a message bus module, adopting a message bus mechanism based on communication among all application processes of the intelligent power grid platform, wherein the message bus mechanism firstly needs to comprise a header file functional block packaged by a basic platform; step 2: accessing a real-time database; the power plant unit system of the intelligent power grid dispatching platform comprises all data real-time databases of units, and the AGC database is to be accessed, so that the real-time databases are required to be accessed first; a set of data access interfaces based on C99 standard are provided by a real-time database system of the platform, and local access and network access functions are provided at the same time; step 3: history library access: the client database accesses the history library by calling interface DCI, and the actual application of the intelligent power grid dispatching technology support system is developed by combining the application on the basis of packaging the DCI of the domestic commercial database.

Description

Real-time data modification interface method based on smart grid dispatching technology system

Technical field

The invention relates to a data modification interface method, in particular to a real-time data modification interface method based on a smart grid dispatching technology system.

Background technique

With the continuous social and economic development of my country's power grid, the scale of the power grid continues to increase, so the management of power grid-related enterprises must be continuously improved to better serve the majority of users. In view of the intelligent and integrated management model of the power grid, focusing on the integration of regulation is one of the important measures to achieve this goal; the State Grid further emphasizes the degree of integration in the integrated management of source and network, in order to ensure the safety of the power grid. Operation, special attention is paid to the configuration of related automation systems and equipment of grid-connected power plants. As an important part of the automation system and equipment of thermal power units, the automatic generation control device (AGC) is one of the important systems that stabilizes the influence of the source side on the power grid. In February 2008, the State Grid Dispatch Center launched the research on the smart grid dispatch control system, including an integrated technical support system basic platform as well as energy management system (EMS), dispatch plan (OPS), and safety check (SCS). and some advanced platform-based applications such as scheduling management (OMS). The smart grid dispatching technology system has the characteristics of standard, open, reliable, safe and adaptable. At present, the smart grid dispatching technology system has been officially launched in many scientific research institutions and power system dispatching centers. It is controlled by remote generating units through the unique supporting function of the smart grid dispatching technology system, the remote signaling information monitoring and management system.

Currently, data modifications in the real-time database require manual input, and there is no supporting module for the real-time database provided to users.

Contents of the invention

In view of the above status quo, the present invention mainly improves the modification of the real-time database in the smart grid dispatching technology system, and develops an interface module that can realize real-time modification of the AGC unit table in the AGC database under the remote signaling table.

A real-time data modification interface method based on a smart grid dispatching technology system. The technical solution is as follows: It includes the following steps:

Step 1: Set up the message bus module. Communication between application processes based on the smart grid platform uses the message bus mechanism. First, it needs to include the header file function block encapsulated by the basic platform.

Step: 2: Access to the real-time database; the power plant unit system of the smart grid dispatching platform contains the real-time database of data for all units. To access the AGC database, you first need to access the real-time database. The platform's real-time database system provides a set of data access interfaces based on the C99 standard, providing both local access and network access functions.

Step 3: History database access: The client database accesses the history database by calling the interface class DCI. It is developed based on the actual application of the smart grid dispatching technology support system and the DCI encapsulation of the domestic commercial database.

Beneficial effects: Real-time modification of the AGC unit table in the AGC database in the remote signaling table in the smart grid dispatching technology system can help researchers analyze the impact on the grid frequency when the unit adjusts the ramp rate, and change the impact on the AGC at different times. The operation mode reduces human participation and makes the simulation scene close to the actual power grid. It is affected by the regulation rate of the generator unit.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the real-time data modification interface method based on the smart grid dispatching technology system.

Figure 2 is a schematic functional structure diagram of the non-detailed simulation generator power frequency adjustment control module based on the real-time data modification interface method of the smart grid dispatch technology system.

Figure 3 is an example diagram of a non-detailed simulation generator interface module based on the real-time data modification interface method of the smart grid dispatching technology system.

Figure 4 is an example diagram of a detailed simulation generator interface module based on the real-time data modification interface method of the smart grid dispatching technology system.

Detailed ways

This embodiment is a preferred example of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the principle scope of this embodiment shall be included in the protection scope of the present invention.

The smart grid dispatching technology system is developed and implemented based on the open source system Linux, which provides users with a lot of convenience in later development, and its program references are mainly based on the Power Dispatch Automation Management Regulations (DL/T 516-2006) and Power System Dispatch Automation Technical Regulations (DL/T 5003-2005), State Grid Regulation [2009] No. 1162 "Smart Grid Dispatch Technical Support System Construction Framework (2009 Edition)", etc. Therefore, when writing its interface, it is necessary to follow the power system database general access interface specification. First, establish a writing environment on the workstation of the smart grid dispatching technology system, and then start writing in the environment based on the communication interface specifications provided by the system, including the message bus mechanism, real-time database access, historical database access, and real-time database modification.

1) Message bus module

The communication between application processes based on the smart grid platform uses the message bus mechanism, which first needs to include the header file function block encapsulated by the basic platform.

2) Access to real-time database

The power plant unit system of the smart grid dispatching platform contains the real-time database of data for all units. To access the AGC database, you first need to access the real-time database. The platform's real-time database system provides a set of data access interfaces based on the C99 standard, providing both local access and network access functions.

3)History database access

The client database accesses the history database by calling the interface class DCI. It is developed based on the actual application of the smart grid dispatching technology support system and the DCI encapsulation of the domestic commercial database.

5.2 Specific implementation steps

By modifying the real-time data of the smart grid dispatching technology system, and thus through the data interaction between the grid-side RTDS software data channel and the grid-side RTDS simulation system, the intelligent control of the AGC is realized through the modification of real-time data based on the smart grid dispatching technology system. The AGC The instructions are transmitted to RTDS through the data transmission channel, thereby achieving the effect of intelligent AGC intelligent control of thermal power units and reducing human influence.

The modeling of this experiment is based on the dynamic characteristics of different power supplies and the known parameters related to the generator provided in the BPA data file. The power supply models that can be simulated based on RTDS are different, such as thermal power, which can be combined with excitation systems, stabilizers, and regulation. parameters and control logic related to the speed reducer system, and build a consistent generator model on the RTDS platform. The following is a classification and description of the grid connection methods of thermal power units.

The thermal power unit model built on the RTDS platform can be refined into two types, one is a non-detailed simulation generator module, which directly responds to the control instructions from the dispatching side, and the other is a detailed simulation generator module, which receives and forwards the control instructions from the dispatching side. Control instructions are given to the source-side smart grid dispatching technology system.

In order to facilitate the explanation of the real-time simulation measurement transmission of the power grid model and the issuance, reception and forwarding of control instructions, the description is given here in conjunction with the dispatch EMS system. As shown in Figure 1, a detailed model of the thermal power unit is established on the source-side smart grid dispatching technology system server. Through the automatic input of this design interface, the data channel is connected to the RTDS grid-side system, and the thermal power simulation is accurately reflected in RTDS. Real-time power ramp changes of the machine. A non-detailed thermal power unit simulation model is established on RTDS and connected to the RTDS power grid model. The power grid model is connected to the smart grid dispatching technology system. At this time, real-time data is uploaded through the implementation channel, so that the effectiveness of the interface development can be verified. The automated operation including joint simulation of thermal power units, RTDS power grid and smart grid dispatching technology system is realized, and combined with the EMS system to form a closed-loop control, thereby meeting the application in the source grid load simulation control system.

A non-detailed simulation generator power frequency adjustment control module is built on RTDS. The simulation objects include the coordination control system module, speed regulation system module, boiler module, and steam turbine module. The relationship between each part is shown in Figure 2. In the figure, ω is the generator rotor speed, ω0 is the generator rotor rated speed, PM is the actual active power output of the generator, TD is the output command of the steam turbine main controller, BD is the output command of the boiler main controller, and CV is the steam turbine door opening command. , pT is the main steam pressure of the boiler, SF is the steam flow rate, and TM is the mechanical torque output by the steam turbine.

Build an interface control module between the RTDS power grid and the non-detailed simulation generator in RTDS, and manually control whether the non-detailed simulation generator accepts the dispatch of the AGC system. If it accepts the dispatch of the AGC system, the EMS will be sent to the AGC of the RTDS power grid simulation module. The command is input into the non-detailed simulation generator power frequency adjustment control module, and its output mechanical torque (per unit value) is connected to the corresponding non-detailed simulation generator body module. An example diagram of the non-detailed simulation generator interface module is shown in Figure 3.

The construction of the detailed simulation generator interface module is to send the detailed simulation generator of thermal power to the generator outlet switch opening and closing instructions (0/1), mechanical power reference value (nominal value), and synchronization signal (0/ 1) As an input quantity, build the interface control module of RTDS power grid and thermal power detailed simulation generator in RTDS. The synchronization signal is represented by the digital quantity 0/1. 0 means that the RTDS power grid and thermal power detailed simulation machine are running independently, and 1 means that they are running synchronously. When the synchronization signal is 1, the thermal power outlet switch status is controlled by the thermal power detailed simulator; the mechanical power reference value is converted into mechanical torque (per unit value) and connected to the generator module of the corresponding unit of the thermal power detailed simulator. The detailed simulation generator interface module example diagram is shown in Figure 4.

Manual control button When the signal is 0, the generator does not accept the dispatch of the AGC system. The active power setting value of the slider is used to adjust the active power output of the generator. The generator outlet switch command uses the initial value; when the signal is 1, The generator receives the AGC command from the dispatch system and converts it into a per unit value and then feeds it into the power frequency adjustment control module (shown in Figure 3). The calculation result is fed into the generator module in Figure 4. The generator outlet switch is sent from the dispatch system. remote control command.

In Figure 4, SYNDH1R is the synchronization signal sent from the thermal power detailed simulation machine on the power side. The initial value of this synchronization signal is 0. When the synchronization signal is 0, the generator uses the calculation results of the excitation system and the speed control system built in RTDS to adjust the reactive power and active power output of the generator. The outlet circuit breaker of the generator is controlled by the value of the switch. When the synchronization signal is 1, the generator uses the mechanical power reference value sent by the thermal power detailed simulation machine on the power supply side and converts it into a per unit value and connects it to the generator body module to adjust the active output of the generator. The outlet of the generator is open circuit. The generator is controlled by the value of the generator outlet switch opening and closing command sent from the thermal power detailed simulation machine on the power side.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and descriptions is only the principle of the present invention. The present invention may also have various modifications without departing from the spirit and scope of the present invention. changes and improvements that fall within the scope of the claimed invention. The scope of protection required for the present invention is defined by the appended claims and their equivalents.

Claims (1)

1. A real-time data modification interface method based on a smart grid dispatching technology system, including the following steps: Step 1: Set up the message bus module. Communication between application processes based on the smart grid platform uses the message bus mechanism. First, it needs to include the header file function block encapsulated by the basic platform; Step: 2: Access to the real-time database; the power plant unit system of the smart grid dispatching platform contains the real-time database of data for all units. To access the automatic power generation control device database, you first need to access the real-time database; the real-time database system of the platform provides a A set of data access interfaces based on the C99 standard, providing both local access and network access functions; Step 3: History database access: The client database accesses the history database by calling the interface class DCI. It is developed based on the actual application of the smart grid dispatching technology support system and the DCI encapsulation of the domestic commercial database; Based on the dynamic characteristics of different power supplies and the known parameters related to the generator provided in the BPA data file, the power supply models that can be simulated by RTDS are different, and a consistent generator model is built on the RTDS platform; the thermal power unit model is built on the RTDS platform It is divided into two types, one is the non-detailed simulation generator module, which directly responds to the control instructions from the dispatching side, and the other is the detailed simulation generator module, which receives and forwards the control instructions from the dispatching side to the source-side smart grid dispatching technology system; A detailed model of the thermal power unit is established on the source-side smart grid dispatching technology system server. Through the automatic input of the design interface, the data channel is connected to the RTDS grid-side system, and the real-time power ramping changes of the thermal power simulator are accurately reflected in the RTDS; in the RTDS Establish a non-detailed thermal power unit simulation model on the Internet and connect it to the RTDS power grid model. The power grid model is connected to the smart grid dispatching technology system. Real-time data is uploaded through the implementation channel to verify whether the development of the interface is effective; it realizes the integration of thermal power units and RTDS. The automated operation of the joint simulation of the power grid and the smart grid dispatching technology system is combined with the EMS system to form a closed-loop control, thereby meeting the application in the source-grid-load simulation control system.