CN1707276A - Real-time emulation method and apparatus for electric system - Google Patents
Real-time emulation method and apparatus for electric system Download PDFInfo
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- CN1707276A CN1707276A CN 200510018766 CN200510018766A CN1707276A CN 1707276 A CN1707276 A CN 1707276A CN 200510018766 CN200510018766 CN 200510018766 CN 200510018766 A CN200510018766 A CN 200510018766A CN 1707276 A CN1707276 A CN 1707276A
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Abstract
The real-time electric power system simulating method and apparatus has the simulated system divided into two parts including one physical simulating part and one digital simulating part. The digital simulating part is replaced with one equivalent voltage source, which has numerical value equal to the voltage of the digital simulation output and is used as the boundary condition of the physical simulating part. The physical simulating part is replaced with one equivalent current source, which has numerical value equal to the current of the physical simulation output and is used as the boundary condition of the digital simulating part. The present invention has the advantages of both physical simulating and digital simulating, excellent universality and high flexibility, and can meet various simulation requirements of increasingly developed electric power system.
Description
Technical field
The invention belongs to the electric system simulation technical field, the real-time emulation method and the device of particularly a kind of electric system physical simulation and Digital Simulation seamless combination.
Background technology
Electric system simulation is the electromagnetism of research electric system complexity and the important means of electromechanical transient process, the design of optimization Power System Planning and operation control.Existing electric system simulation technology is divided from analogy method and is mainly contained two kinds: physical simulation and Digital Simulation.The Electrical Power System Dynamic physical simulation is to explore unknown physics law, the dynamic behaviour of research practical power systems, the indispensable important means of verification new equipment, have plurality of advantages such as phenomenon is directly perceived, clear physics conception, yet have defectives such as construction investment is huge, parameter change is difficult, simulation precision is not high, simulation precision is limited simultaneously.Along with the expansion day by day of electric system scale and the complexity day by day of the method for operation, traditional simulates requirement with the complicated electric power system equivalence for the dynamic physical simulation method of minority unit has been difficult to satisfy.Along with the fast development of microelectric technique and computer science, electric system real-timedigital simulation technology is maked rapid progress, and emerges such as RTDS (Real-Time Digital Simulator) to have the real-timedigital simulation system that improves simulation capacity.These real-timedigital simulation systems can change the parameter setting flexibly and easily, has stronger versatility, simulate larger, but then simulate effect is not good for the problem of setting up satisfied mathematical model as yet or the very high problem (as the triggering control of HVDC) of real-time continuous, at this moment just must be by means of physical simulation.Therefore, physical simulation and Digital Simulation have his own strong points, also respectively have shortage, and growing electric system requires a kind of more comprehensively emulation technology.
Summary of the invention
The objective of the invention is to two kinds of electric system simulation technology are combined, propose a kind of electric system physics and numeral associating real-time emulation method and device.This associating real-time emulation method and device can be realized the associating real-time simulation to complicated electric power system.
The technical scheme that the present invention improves is: a kind of method of power system real-time simulation, and will simulated electric system and be divided into two parts, a part adopts physical simulation, and another part adopts Digital Simulation; To adopt the part of Digital Simulation to replace with equivalent voltage source, the numerical value of equivalent voltage source equals the voltage of Digital Simulation output, and the simulation to the part that adopts physical simulation is realized as the portion boundary condition that adopts physical simulation in these threshold voltage sources; To adopt the part of physical simulation to replace with equivalent current source, the numerical value of equivalent current source equals the electric current of physical simulation output, and this equivalence current source is realized the simulation to the part that adopts Digital Simulation as the portion boundary condition that adopts Digital Simulation.Physical simulation and Digital Simulation realize the united and coordinating emulation to electric system under the monitoring of monitor supervision platform.
The present invention also provides a kind of electric system physics and numeral associating real-time simulation apparatus, comprise the dynamic physical simulation part that constitutes by electric system physical model and physics supervisory control and data acqui sition system, by the real-timedigital simulation part that mathematical models of power system and digital supervision and data acquisition system (DAS) constitute, dynamic physical simulation part, real-timedigital simulation are partly by comprising that the physical simulation interface is connected with the interconnecting interface of Digital Simulation interface; The Digital Simulation interface is made of A/D converter, photoelectric isolating circuit and current sensor, the electric current output of the electric system physical model of dynamic physical simulation part is connected with the input of current sensor, the output of current sensor is connected with the input of photoelectric isolating circuit, the output of photoelectric isolating circuit is connected with the input of A/D converter, and the output of A/D converter is connected with the input of the mathematical models of power system of real-timedigital simulation part; The physical simulation interface is made of power amplification circuit, photoelectric isolating circuit and D/A converter, the economize on electricity voltage output of the mathematical models of power system of Digital Simulation part is connected with the input of D/A converter, the output of D/A converter is connected with the input of photoelectric isolating circuit, the output of photoelectric isolating circuit is connected with the input of power amplification circuit, and the output of power amplification circuit is connected with the input of the electric system physical model of dynamic physical simulation part; Be provided with the monitor supervision platform of forming by associative simulation global control module, database and man-machine Switching Module, the associative simulation global control module is connected with database with data acquisition system (DAS) with physics supervisory control and data acqui sition system, digital supervision respectively by data exchange ways, and man-machine Switching Module is connected with database with the associative simulation global control module respectively by data exchange ways.
Power amplification circuit in the above-mentioned physical simulation interface adopts the structure of convertor circuit back-to-back of dc capacitor coupling, the convertor circuit structure comprises three-phase alternating-current supply back-to-back, isolating transformer, rectifying part, DC coupling electric capacity and inversion part, the former limit of the output of three-phase alternating-current supply and isolating transformer links, the secondary of isolating transformer and the input of the three-phase of rectifying part link, the input of the output of rectifying part and DC coupling electric capacity links, the input of the output of DC coupling electric capacity and inversion part links, and the voltage input of the output of inversion part and electric system physical model links.
The theoretical foundation that this associative simulation method and apparatus is realized is: physical simulation and Digital Simulation have been reproduced electric system uniformly by differential---the described physical process of Algebraic Equation set, and therefore as if can finishing to united and coordinating combined simulation for physical simulation and Digital Simulation System form suitable boundary condition respectively to electric system.
The theoretical foundation that boundary condition forms is that circuit substitutes equivalent theorem.According to substituting theorem: the circuit of port one side can equal the current source of port current or voltage source that numerical value equals port voltage substitutes by numerical value, and does not influence the physical process of port opposite side circuit.
The theoretical foundation of dynamic physical simulation system is the principle of similitude.Based on the principle of similitude, physical simulation is adopted by the mock-up of certain principle design and is simulated electric system.
The kernel software of real-timedigital simulation system is electromagnetic transient state procedure EMTP, and EMTP at first by trapezoidal integration, is converted to an equivalent computational grid of being made up of resistance and current source with electric power networks when finding the solution electric power networks, then by nodal method U=Y
-1I finds the solution this equivalence computational grid, and wherein Y is the network node admittance matrix, and I is a node injection current source vector.
Based on the calculating principle of above-mentioned Digital Simulation, Digital Simulation partly adopts the equivalent circuit of current source form to form boundary condition, adopts the equivalent current source digital model of controlled injection to realize; The physical simulation part then adopts the equivalent circuit of voltage source form to form boundary condition, adopts based on the high-precision power amplifying circuit with quick response of back-to-back converter structure and realizes.
The present invention has the following advantages and good effect
To substitute theorem is that theoretical foundation forms interconnecting interface, physical simulation and Digital Simulation organically can be combined, and finishes electric system associating real time modelling under the monitoring of software platform.Electric system physics is united the advantage that Real-time Simulation System has merged physical simulation and two kinds of methods of Digital Simulation with numeral, has great general applicability and dirigibility, can satisfy the growing various simulation requirements that electric system proposed.
Description of drawings
Fig. 1 is electric system associating real-time simulation apparatus structure of the present invention and fundamental diagram;
Fig. 2 is the embodiment block diagram of ring texture interconnecting interface.
Embodiment
An application example below in conjunction with this power system real-time simulation device: the research external electrical network is further described the present invention the influence of certain local power system stability.
Suppose that the A of this local power system comprises power plant, main transformer, circuit, load, FACTS equipment and novel excitation, speed governing, protective relaying device.External electrical network B is the electrical network of in large scale, structure and method of operation complexity.
At first, according to problem of being studied and object, because need the performance of physical phenomenon such as power-angle oscillation in the research local power A of system and FACTS equipment and novel excitation, protection, protective relaying device, and need the external electrical network structure and the method for operation thereof of emulation complexity simultaneously, so be studied electric system and be divided into two parts whole, a part is that the A of local power system, a part are external electrical network B; The A of local power system adopts physical simulation, external electrical network B to adopt Digital Simulation.
Once more, build physical simulation subsystem and Digital Simulation subsystem respectively according to the structure of A and B.
Then, form the boundary condition of each simulation subsystem: the electric current output of physical simulation subsystem links to each other with the input of WB potline current sensor, the output of current sensor links to each other with the input that the light of RTDS is isolated analog/digital conversion card OADC, OADC comprises photoelectric isolating circuit and A/D converter two parts, the output of photoelectric isolating circuit is connected with the input of A/D converter, the input of OADC is the input of optically coupled isolation circuit, the output of OADC is the output of A/D converter, the output of OADC links to each other with the Digital Simulation subsystem, has so just formed the boundary condition of Digital Simulation subsystem; The economize on electricity voltage output of the mathematical models of power system of Digital Simulation subsystem links to each other with the input that the light of RTDS is isolated digital-to-analog transition card ODAC, ODAC comprises D/A converter and photoelectric isolating circuit, the input of ODAC is the input of D/A converter, the output of ODAC is the output of photoelectric isolating circuit, the output of D/A converter is connected with the input of photoelectric isolating circuit, the output of OADC is connected with the input of power amplification circuit, the output of power amplification circuit is connected with the input of the electric system physical model of dynamic physical simulation part, has so just formed the boundary condition of physical simulation subsystem.
At last, start the associative simulation device, implement real-time associative simulation.
Referring to Fig. 1, Fig. 2, real-time simulation apparatus of the present invention is as follows: device comprises the dynamic physical simulation part 1 that is made of electric system physical model 1.1 and physics supervisory control and data acqui sition system 1.2, by the real-timedigital simulation part 2 that mathematical models of power system 2.1 and digital supervision and data acquisition system (DAS) 2.2 constitute, and dynamic physical is simulated part 1, real-timedigital simulation part 2 is connected by the interconnecting interface 3 that comprises physical simulation interface and Digital Simulation interface; The Digital Simulation interface is made of A/D converter, photoelectric isolating circuit and current sensor, the electric current output of the electric system physical model 1.1 of dynamic physical simulation part 1 is connected with the input of current sensor, the output of current sensor is connected with the input of photoelectric isolating circuit, the output of photoelectric isolating circuit is connected with the input of A/D converter, and the output of A/D converter is connected with the input of the mathematical models of power system 2.1 of real-timedigital simulation part 2; The physical simulation interface is made of power amplification circuit, photoelectric isolating circuit and D/A converter, the economize on electricity voltage output of the mathematical models of power system 2.1 of Digital Simulation part is connected with the input of D/A converter, the output of D/A converter is connected with the input of photoelectric isolating circuit, the output of photoelectric isolating circuit is connected with the input of power amplification circuit, and the output of power amplification circuit is connected with the input of the electric system physical model 1.1 of dynamic physical simulation part; Be provided with the monitor supervision platform of forming by associative simulation global control module 4.1, database 4.2 and man-machine Switching Module 4.3, associative simulation global control module 4.1 is connected with database 4.2 with data acquisition system (DAS) 2.2 with physics supervisory control and data acqui sition system 1.2, digital supervision respectively by data exchange ways, and man-machine Switching Module 4.3 is connected with database 4.2 with associative simulation global control module 4.1 respectively by data exchange ways.
Power amplification circuit in the physical simulation interface adopts the structure of convertor circuit back-to-back of dc capacitor coupling, the convertor circuit structure comprises three-phase alternating-current supply 3.1.8 back-to-back, isolating transformer 3.1.10, rectifying part 3.1.4, DC coupling electric capacity 3.1.9 and inversion part 3.1.6, the former limit of the output of three-phase alternating-current supply 3.1.8 and isolating transformer 3.1.10 links, the three-phase input of the secondary of isolating transformer 3.1.10 and rectifying part 3.1.4 links, the input of the output of rectifying part 3.1.4 and DC coupling electric capacity 3.1.9 links, the input of the output of DC coupling electric capacity 3.1.9 and inversion part 3.1.6 links, and the output of inversion part 3.1.6 and the input of the voltage of electric system physical model 1.1 link.
Claims (3)
1. the method for a power system real-time simulation is characterized in that: will simulated electric system and be divided into two parts, part employing physical simulation, another part employing Digital Simulation; To adopt the part of Digital Simulation to replace with equivalent voltage source, the numerical value of equivalent voltage source equals the voltage of Digital Simulation output, and the simulation to the part that adopts physical simulation is realized as the portion boundary condition that adopts physical simulation in these threshold voltage sources; To adopt the part of physical simulation to replace with equivalent current source, the numerical value of equivalent current source equals the electric current of physical simulation output, and this equivalence current source is realized the simulation to the part that adopts Digital Simulation as the portion boundary condition that adopts Digital Simulation.
2. an electric system physics is united real-time simulation apparatus with numeral, comprise that it is characterized in that: dynamic physical is simulated part (1), real-timedigital simulation part (2) is connected by the interconnecting interface (3) that comprises physical simulation interface and Digital Simulation interface by the dynamic physical simulation part (1) of electric system physical model (1.1) and physics supervisory control and data acqui sition system (1.2) formation, by the real-timedigital simulation part (2) of mathematical models of power system (2.1) and digital supervision and data acquisition system (DAS) (2.2) formation; The Digital Simulation interface is made of A/D converter, photoelectric isolating circuit and current sensor, the electric current output of the electric system physical model (1.1) of dynamic physical simulation part (1) is connected with the input of current sensor, the output of current sensor is connected with the input of photoelectric isolating circuit, the output of photoelectric isolating circuit is connected with the input of A/D converter, and the output of A/D converter is connected with the input of the mathematical models of power system (2.1) of real-timedigital simulation part (2); The physical simulation interface is made of power amplification circuit, photoelectric isolating circuit and D/A converter, the economize on electricity voltage output of the mathematical models of power system (2.1) of Digital Simulation part is connected with the input of D/A converter, the output of D/A converter is connected with the input of photoelectric isolating circuit, the output of photoelectric isolating circuit is connected with the input of power amplification circuit, and the output of power amplification circuit is connected with the input of the electric system physical model (1.1) of dynamic physical simulation part; Be provided with the monitor supervision platform of forming by associative simulation global control module (4.1), database (4.2) and man-machine Switching Module (4.3), associative simulation global control module (4.1) is connected with database (4.2) with data acquisition system (DAS) (2.2) with physics supervisory control and data acqui sition system (1.2), digital supervision respectively by data exchange ways, and man-machine Switching Module (4.3) is connected with database (4.2) with associative simulation global control module (4.1) respectively by data exchange ways.
3. device according to claim 2, it is characterized in that: the power amplification circuit in the physical simulation interface adopts the structure of convertor circuit back-to-back of dc capacitor coupling, the convertor circuit structure comprises three-phase alternating-current supply back-to-back, isolating transformer, rectifying part, DC coupling electric capacity and inversion part, the former limit of the output of three-phase alternating-current supply and isolating transformer links, the secondary of isolating transformer and the input of the three-phase of rectifying part link, the input of the output of rectifying part and DC coupling electric capacity links, the input of the output of DC coupling electric capacity and inversion part links, and the voltage input of the output of inversion part and electric system physical model (1.1) links.
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| CN101975901A (en) * | 2010-10-09 | 2011-02-16 | 国网电力科学研究院 | Comprehensive test method of electric energy quality and energy-saving device |
| CN102156272A (en) * | 2011-03-16 | 2011-08-17 | 重庆电力科学试验研究院 | Electric energy metering verification method, device and system |
| CN102402187A (en) * | 2011-11-23 | 2012-04-04 | 浙江大学 | Semi-physical simulation method amplified by space division equipment |
| CN102609598A (en) * | 2012-03-27 | 2012-07-25 | 天津大学 | Method for performing electromagnetic transient-state simulation to large power system |
| CN103021241A (en) * | 2012-12-12 | 2013-04-03 | 山东大学 | Dynamic simulation system of low voltage electric power system |
| CN103400523A (en) * | 2013-07-08 | 2013-11-20 | 山东大学 | Open micro dynamic simulation and monitoring system for power system |
| CN103499731A (en) * | 2013-08-27 | 2014-01-08 | 广东电网公司电力科学研究院 | Supply voltage qualified rate comprehensive analysis method |
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| CN101975901A (en) * | 2010-10-09 | 2011-02-16 | 国网电力科学研究院 | Comprehensive test method of electric energy quality and energy-saving device |
| CN102156272A (en) * | 2011-03-16 | 2011-08-17 | 重庆电力科学试验研究院 | Electric energy metering verification method, device and system |
| CN102402187A (en) * | 2011-11-23 | 2012-04-04 | 浙江大学 | Semi-physical simulation method amplified by space division equipment |
| CN102402187B (en) * | 2011-11-23 | 2013-06-05 | 浙江大学 | Semi-physical simulation method amplified by space division equipment |
| CN102609598A (en) * | 2012-03-27 | 2012-07-25 | 天津大学 | Method for performing electromagnetic transient-state simulation to large power system |
| CN102609598B (en) * | 2012-03-27 | 2014-05-21 | 天津大学 | Method for performing electromagnetic transient-state simulation to large power system |
| CN103021241A (en) * | 2012-12-12 | 2013-04-03 | 山东大学 | Dynamic simulation system of low voltage electric power system |
| CN103400523B (en) * | 2013-07-08 | 2014-10-08 | 山东大学 | Open micro dynamic simulation and monitoring system for power system |
| CN103400523A (en) * | 2013-07-08 | 2013-11-20 | 山东大学 | Open micro dynamic simulation and monitoring system for power system |
| CN103499731A (en) * | 2013-08-27 | 2014-01-08 | 广东电网公司电力科学研究院 | Supply voltage qualified rate comprehensive analysis method |
| CN103499731B (en) * | 2013-08-27 | 2016-08-24 | 广东电网公司电力科学研究院 | A kind of comprehensive analysis method of supply voltage qualification rate |
| CN103500529A (en) * | 2013-09-30 | 2014-01-08 | 国家电网公司 | Power electronic digital-analog hybrid system for technical skill training |
| CN103809465B (en) * | 2014-02-27 | 2016-04-20 | 华北电力大学 | The communication interface of a kind of thermoelectricity and Hydropower Unit replicating machine and RTDS |
| CN103809465A (en) * | 2014-02-27 | 2014-05-21 | 华北电力大学 | Simulation machine of thermal power generating unit and hydroelectric power generating unit and communication interface of real time digital simulator (RTDS) |
| CN105550385A (en) * | 2015-09-18 | 2016-05-04 | 中国电力科学研究院 | Small step transient simulation method and system for distribution network including distributed power supply |
| CN109523859A (en) * | 2018-12-19 | 2019-03-26 | 南京南瑞继保电气有限公司 | A kind of track traffic synthetic monitoring mixing Training Simulation System and method |
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