CN105527858A - Hardware-in-the-loop simulation system for automatic generation control in smart grid - Google Patents
Hardware-in-the-loop simulation system for automatic generation control in smart grid Download PDFInfo
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Abstract
The invention relates to a hardware-in-the-loop simulation system for automatic generation control in a smart grid. The system comprises: a data acquisition monitoring device, used for acquiring field data from the grid on line; a power system real-time digital simulation device, used for implementing real-time digital simulation of a primary system of the smart grid according to the data acquisition monitoring device; a programmable logic controller, used for generating an automatic generation control algorithm to control the power system real-time digital simulation device; and a TCP/IP (Transmission Control Protocol/Internal Protocol) real-time communication device, used for implementing communication between the power system real-time digital simulation device and the data acquisition monitoring device and between the power system real-time digital simulation device and the programmable logic controller. Compared with the prior art, the system has the advantages of real-time simulation, high adaptability and the like.
Description
Technical field
The present invention relates to electric system hardware in loop simulation technique, especially relate to the hardware-in-loop simulation system of Automatic Generation Control in a kind of intelligent grid.
Background technology
Along with the sustained and rapid development of Chinese national economy, the demand of China to the energy increases day by day, and traditional fossil fuel uses the resource, the environmental pressure that also bring sternness, is unsustainable development based on the energy supply system of traditional fossil fuel.The renewable energy power generation technology being representative with wind-powered electricity generation, photovoltaic has zero carbon emission, efficiency of energy utilization high and being developed rapidly.Wind-powered electricity generation generating is the most ripe, the most potential renewable resource generation technology of current technology, and in worldwide, wind-powered electricity generation permeability is in rapid rising.USDOE has formulated the target that wind-powered electricity generation accounts for the proportion of american energy structure, will reach 20% to the year two thousand thirty, will reach 35% to the year two thousand fifty; European Union has wind-powered electricity generation to account for the target of the ratio of European Union's power demand, will reach 28.5% to the year two thousand thirty, will reach 50% to the year two thousand fifty; There is the target of the ratio of wind-powered electricity generation in power supply architecture in China, will reach 15% to the year two thousand thirty, will reach 26% to the year two thousand fifty.But along with improving constantly of wind-powered electricity generation permeability, randomness and the intermittent safe and stable operation of electrical network of giving of wind-powered electricity generation bring severe challenge.For large-scale wind electricity digestion, the research improving the stability of wind power output power, balanced system generated output and load consumed power just comes into one's own.Integrated gas-steam combined cycle power plant (CCPP, Gas-SteamCombinedCyclePowerPlant) technology has high-level efficiency, low stain, low water consumption, starts feature and the regulating powers of exerting oneself fast such as fast, Large Copacity, and the fluctuation of the Tie line Power brought for smooth wind power power and load in intelligent grid is significant.Therefore, need adopt Automatic Generation Control (AGC, AutomaticGenerationControl) technology, be used for meet scheduling demand and system safety operation.In intelligent grid, Automatic Generation Control needs new emulation tool to carry out simulation study with the research of the operation plan relating to regenerative resource.Existing electric system simulation device can not meet in intelligent grid by oneself to simulation requirements such as system scale, real-time simulation, in-circuit emulation, complicated algorithms, thus need to adopt dissimilar electric system simulation device to carry out hybrid simulation, to form hardware-in-loop simulation platform, realize more efficiently emulation mode in intelligent grid.
Summary of the invention
Object of the present invention be exactly provide to overcome defect that above-mentioned prior art exists a kind of can the hardware-in-loop simulation system of Automatic Generation Control in the high intelligent grid of real-time simulation, adaptability.
Object of the present invention can be achieved through the following technical solutions:
A hardware-in-loop simulation system for Automatic Generation Control in intelligent grid, comprising:
Data acquisition supervising device, for obtaining the field data from electrical network online;
Electric system real-timedigital simulation device, for realizing the real-timedigital simulation of intelligent grid primary system according to described data acquisition supervising device;
Programmable logic controller (PLC), controls described electric system real-timedigital simulation device for generating Automatic Generation Control algorithm;
TCP/IP real-time Communication for Power device, for realizing communicating of electric system real-timedigital simulation device and data acquisition supervising device and programmable logic controller (PLC).
The intelligent grid primary system of described electric system real-timedigital simulation device simulation comprises extensive renewable energy system, conventional power generating systems, combined cycle generation system of fuel gas-steam, transmission and distribution networks and load.
When described electric system real-timedigital simulation device carries out the emulation of intelligent grid primary system, on-line tracing carries out real-time simulation from the real time data of data acquisition supervising device or off-line utilizes the historical data of data acquisition supervising device to carry out history playback emulation.
The undulatory property power supply active power being provided with the meritorious output for following the tracks of regenerative resource in intelligent grid primary system in described electric system real-timedigital simulation device follows the tracks of interface.
Described undulatory property power supply active power is followed the tracks of interface and is comprised dq decoupling controller.
Described electric system real-timedigital simulation device comprises RTDS device.
The Automatic Generation Control algorithm that described programmable logic controller (PLC) generates comprises the scheduling of 3 time scales: scheduling, economic load dispatching and district control deviation regulate a few days ago, and the balance of the generating and load that are realized the intelligent grid primary system emulated in electric system real-timedigital simulation device by the scheduling of described 3 time scales is controlled.
The communication protocol of described TCP/IP real-time Communication for Power device support comprises IEC60870-5-104 agreement.
Compared with prior art, the present invention has the following advantages:
1) electric system real-timedigital simulation device of the present invention realizes the emulation comprising the intelligent grid primary system of extensive renewable energy system, conventional power generating systems, combined cycle generation system of fuel gas-steam, transmission and distribution networks and load etc., the advantage of different electric power simulator can be made full use of, form the hardware-in-loop simulation system meeting intelligent grid emulation demand, intelligent grid emulation can be met to requirements such as system scale, real-time, in-circuit emulation, complicated algorithms, there is adaptability widely.
2) electric system real-timedigital simulation device of the present invention uses RTDS device, have can real-time simulation, the feature of numeral-physical closed-loop flexibly can be formed with external unit.
3) the present invention adopts programmable logic controller (PLC) to generate the operation of Automatic Generation Control algorithm control electric system real-timedigital simulation device, can change Automatic Generation Control strategy neatly, thus improve the efficiency of Automatic Generation Control emulation.
4) electric system real-timedigital simulation device of the present invention emulates according to the data of SCADA system, and SCADA system can obtain field data online, thus utilizes measured data to verify Automatic Generation Control strategy validity.
5) TCP/IP real-time Communication for Power device of the present invention supports IEC60870-5-104 agreement, this agreement has that real-time is good, reliability is high, data traffic is large, be convenient to the features such as quantity of information expansion, network enabled transmission, data band time tag, be used for the bidirectional real-time realized between RTDS and PLC, be beneficial to the exchanges data of Automatic Generation Control emulation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is that undulatory property power supply active power follows the tracks of interface principle figure;
Fig. 3 is the intelligent grid primary system structural drawing of emulation;
Fig. 4 is Automatic Generation Control algorithm principle figure;
Fig. 5 is the illustraton of model that in RTDS, undulatory property power supply active power follows the tracks of interface;
Fig. 6 is that undulatory property power supply active power follows the tracks of interface simulation result curve figure;
Fig. 7 is Automatic Generation Control simulation result curve map.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.The present embodiment is implemented premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, the present embodiment provides the hardware-in-loop simulation system of Automatic Generation Control in a kind of intelligent grid, comprise data acquisition supervising device 1, electric system real-timedigital simulation device 2, programmable logic controller (PLC) 3 and TCP/IP real-time Communication for Power device 4, wherein, data acquisition supervising device 1 is for obtaining the field data from electrical network online; Electric system real-timedigital simulation device 2 is for realizing the real-timedigital simulation of intelligent grid primary system according to data acquisition supervising device; Programmable logic controller (PLC) 3 controls electric system real-timedigital simulation device for generating Automatic Generation Control algorithm; TCP/IP real-time Communication for Power device 4 is for realizing communicating of electric system real-timedigital simulation device and data acquisition supervising device and programmable logic controller (PLC).
In the present embodiment, electric system real-timedigital simulation device 2 adopts RTDS device, and this device has following features:
(1) real-timedigital simulation calculates: namely utilize modern parallel computing, by the ruuning situation of hardware platform real time modelling practical power systems;
(2) network service: namely can support different network communication protocols, can carry out network service, carry out exchanges data with other equipment.
The intelligent grid primary system of electric system real-timedigital simulation device 2 emulation comprises extensive renewable energy system, conventional power generating systems, combined cycle generation system of fuel gas-steam, transmission and distribution networks and load etc.When electric system real-timedigital simulation device carries out the emulation of intelligent grid primary system, on-line tracing carries out real-time simulation from the real time data of data acquisition supervising device or off-line utilizes the historical data of data acquisition supervising device to carry out history playback emulation.
The undulatory property power supply active power being provided with the meritorious output for following the tracks of regenerative resource in intelligent grid primary system in electric system real-timedigital simulation device 2 follows the tracks of interface 21.Utilize controllable voltage source to replace the undulatory property power supply such as wind park, photovoltaic power plant in electric system real-timedigital simulation device 2, and utilize dq Uncoupling Control Based to follow the tracks of interface to realize undulatory property power supply active power, make controllable voltage source have identical external characteristic with renewable energy power generation factory.Undulatory property power supply active power follows the tracks of the principle of interface 21 as shown in Figure 2.First obtain three-phase voltage, electric current from grid side, obtain dq shaft voltage, electric current by park transforms, dq axle reference current can be calculated by dq shaft voltage and actual renewable energy power generation power:
Utilize current feed-forward uneoupled control:
The control voltage of dq axle can be obtained, finally by Parker's inverse transformation, get back to three-phase static coordinate system, obtain three-phase voltage control signal, be used for control voltage source.
Data acquisition supervising device 1 (SCADA, SupervisoryControlAndDataAcquisition) can adopt SIMATICWinCC.
The Automatic Generation Control algorithm that programmable logic controller (PLC) 3 generates comprises the scheduling of 3 time scales: scheduling, economic load dispatching and district control deviation regulate a few days ago, and the balance of the generating and load that are realized the intelligent grid primary system emulated in electric system real-timedigital simulation device by the scheduling of 3 time scales is controlled.Programmable logic controller (PLC) 3 can adopt BECKHOFFPLC, first in MATLAB/Simulink environment, build and test the realistic model of Automatic Generation Control algorithm, then TwinCAT3 software is utilized seamlessly to integrate Simulink model, finally in BECKHOFFPLC, perform Automatic Generation Control algorithm, adopt programmable logic controller (PLC), Automatic Generation Control strategy can be changed neatly, thus improve the efficiency of Automatic Generation Control emulation.
The communication protocol that TCP/IP real-time Communication for Power device 4 is supported comprises IEC60870-5-104 agreement.TCP/IP real-time Communication for Power device 4 comprises the GTNET card of RTDS device, and as communication slave station, SCADA and PLC is as communication main station.IEC60870-5-104 agreement is the network service based on TCP/IP, having that real-time is good, reliability is high, data traffic is large, be convenient to the advantages such as quantity of information expansion, network enabled transmission, data band time tag, is in the widely used communication protocol of field of power.RTDS is communicated with SCADA, PLC by GTNET card.RTDS can obtain the data of renewable energy power generation factory from SCADA server and load online, also can playback history data.By IEC60870-5-104 agreement, the data needed for Automatic Generation Control algorithm are issued PLC by RTDS, and control command is fed back to RTDS by PLC, achieves the bidirectional real-time of RTDS and PLC, constitutes hardware-in-loop simulation.
Below with Chongming Island electrical network for example carries out hardware-in-loop simulation, specific as follows:
1) electric system real-timedigital simulation device
The structural drawing of the intelligent grid primary system emulated in RTDS as shown in Figure 3.Chongming Island electrical network comprises large-scale wind electricity factory, gas-steam combined cycle power plant, transformer station and equivalent load, is connected with Shanghai Power Network, Jiangsu Power Grid by interconnection.By integrating the generating plant, load etc. on Chongming Island, Chongming Island can be participated in system call as an equivalent generating plant.Build analogue system as shown in Figure 3 in draft in RSCAD, wherein load controllable burden represents, wind park controllable voltage source replaces, and follows the tracks of interface by undulatory property power supply active power and follow the tracks of the actual of wind park and exert oneself.
2) programmable logic controller (PLC)
The schematic diagram of the Automatic Generation Control algorithm emulated in BECKHOFFPLC as shown in Figure 4.First build in MATLAB/Simulink environment and test control algolithm as shown in Figure 4, then embedding in BECKHOFFPLC, in PLC, run control strategy.Automatic Generation Control algorithm of the present invention comprises the scheduling of 3 time scales: scheduling a few days ago, economic load dispatching, district control deviation (ACE, AreaControlError) regulate.By being optimized calculating to operation plan, ultra-short term, wind power prediction a few days ago, Real-Time Scheduling signal can be obtained; Real-Time Scheduling make use of up-to-date wind power prediction value, and considers the operating cost of gas-steam combined cycle power plant, duration of startup and shutdown and the restriction of climbing rate.The object that ACE regulates is Real-time Balancing generating and load.AGC signal sends to RTDS in every 6 seconds, changes exerting oneself of gas-steam combined cycle power plant.
3) based on the real-time Communication for Power of TCP/IP
RTDS carries out network service by GTNET card and other equipment, by IEC60870-5-104 agreement, and GTNET card support 1024 digital state amounts, 512 digital controlled quentity controlled variables, 500 emulation mode amounts, 100 analogue enlargement amounts, GTNET is slave station; SCADA and PLC is main website, needs to carry out communications setting according to GTNET, thus can communicate with GTNET.In addition, in RTDS, also to define one " some table " to mate with the data of main website.
4) undulatory property power supply active power follows the tracks of interface
Utilize the CBuilder assembly in RTDS can follow the tracks of interface to undulatory property power supply active power to encapsulate, as shown in Figure 5.Build in MATLAB/Simulink environment and follow the tracks of interface with the undulatory property power supply active power shown in test pattern 2, and generate c code, CBuilder imports c code and generates packaging model.The wind power that final packaging model is input as grid side three-phase voltage, electric current, needs are followed the tracks of, Output rusults is three-phase voltage control signal, is used for control voltage source.
5) simulation result
A, undulatory property power supply active power follow the tracks of interface tracking effect
Undulatory property power supply active power follows the tracks of interface tracking effect as shown in Figure 6.In figure, red curve Pord is actual wind power, and black curve Pm is the wind power data followed the tracks of, the wind power of known tracking and the result of actual wind power basically identical, therefore wind park can be replaced with controllable voltage source, follow the tracks of the actual of wind park by undulatory property power supply active power tracking interface module and exert oneself.
B, Automatic Generation Control effect
Actual dominant eigenvalues trace scheduling Dependence Results as shown in Figure 7.In figure, blue solid lines is planned dispatching curve, and red dotted line is actual dominant eigenvalues, and the probability of dominant eigenvalues deviation within 1% is 99.42%, during known extensive regenerative resource access intelligent grid, Automatic Generation Control strategy successful, meets electric power system dispatching requirement.
Automatic Generation Control strategy validity during in order to study extensive regenerative resource access intelligent grid, the invention provides the hardware-in-loop simulation method of Automatic Generation Control in a kind of intelligent grid, simulation result shows Automatic Generation Control strategy validity when the present invention utilizes hardware-in-loop simulation technique study extensive regenerative resource access intelligent grid, the present invention can meet intelligent grid emulation to requirements such as system scale, real-time, in-circuit emulation, complicated algorithms, has adaptability widely.
Claims (8)
1. the hardware-in-loop simulation system of Automatic Generation Control in intelligent grid, is characterized in that, comprising:
Data acquisition supervising device, for obtaining the field data from electrical network online;
Electric system real-timedigital simulation device, for realizing the real-timedigital simulation of intelligent grid primary system according to described data acquisition supervising device;
Programmable logic controller (PLC), controls described electric system real-timedigital simulation device for generating Automatic Generation Control algorithm;
TCP/IP real-time Communication for Power device, for realizing communicating of electric system real-timedigital simulation device and data acquisition supervising device and programmable logic controller (PLC).
2. the hardware-in-loop simulation system of Automatic Generation Control in intelligent grid according to claim 1, it is characterized in that, the intelligent grid primary system of described electric system real-timedigital simulation device simulation comprises extensive renewable energy system, conventional power generating systems, combined cycle generation system of fuel gas-steam, transmission and distribution networks and load.
3. the hardware-in-loop simulation system of Automatic Generation Control in intelligent grid according to claim 1, it is characterized in that, when described electric system real-timedigital simulation device carries out the emulation of intelligent grid primary system, on-line tracing carries out real-time simulation from the real time data of data acquisition supervising device or off-line utilizes the historical data of data acquisition supervising device to carry out history playback emulation.
4. the hardware-in-loop simulation system of Automatic Generation Control in intelligent grid according to claim 1, it is characterized in that, the undulatory property power supply active power being provided with the meritorious output for following the tracks of regenerative resource in intelligent grid primary system in described electric system real-timedigital simulation device follows the tracks of interface.
5. the hardware-in-loop simulation system of Automatic Generation Control in intelligent grid according to claim 4, is characterized in that, described undulatory property power supply active power is followed the tracks of interface and comprised dq decoupling controller.
6. the hardware-in-loop simulation system of Automatic Generation Control in intelligent grid according to claim 1, it is characterized in that, described electric system real-timedigital simulation device comprises RTDS device.
7. the hardware-in-loop simulation system of Automatic Generation Control in intelligent grid according to claim 1, it is characterized in that, the Automatic Generation Control algorithm that described programmable logic controller (PLC) generates comprises the scheduling of 3 time scales: scheduling, economic load dispatching and district control deviation regulate a few days ago, and the balance of the generating and load that are realized the intelligent grid primary system emulated in electric system real-timedigital simulation device by the scheduling of described 3 time scales is controlled.
8. the hardware-in-loop simulation system of Automatic Generation Control in intelligent grid according to claim 1, it is characterized in that, the communication protocol of described TCP/IP real-time Communication for Power device support comprises IEC60870-5-104 agreement.
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| CN111488687A (en) * | 2020-04-14 | 2020-08-04 | 南方电网科学研究院有限责任公司 | AGC test method based on RTDS real-time simulation and related device |
| CN111488687B (en) * | 2020-04-14 | 2023-02-28 | 南方电网科学研究院有限责任公司 | AGC test method based on RTDS real-time simulation and related device |
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Application publication date: 20160427 |