CN204229391U - Hybrid simulation interface and there is the electric system hybrid real-time simulation equipment of this interface - Google Patents
Hybrid simulation interface and there is the electric system hybrid real-time simulation equipment of this interface Download PDFInfo
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Abstract
A kind of hybrid simulation interface and there is the electric system hybrid real-time simulation equipment of this interface, hybrid simulation interface is connected between real-time electromechanical transient emulation equipment and real-time electromagnetic transient simulation equipment, for carrying out closed loop alternately with real-time electromagnetic transient simulation equipment, real-time electromechanical transient emulation equipment, be provided with the first dynamic equivalent circuit, the second dynamic equivalent circuit and sequential circuit.First dynamic equivalent circuit is Dai Weinan dynamic equivalent circuit, and the second dynamic equivalent circuit is dynamic power source model.Analogue system is provided with real-time electromagnetic transient simulation equipment, real-time electromechanical transient emulation equipment and hybrid simulation interface.This hybrid simulation interface can realize that real-time electromagnetic transient simulation equipment and real-time electromechanical transient emulation equipment are two-way to be connected and data are carried.The utility model energy real-time simulation large scale electric network is the quick electromagnetic transient responded of dynamic electromechanical transient process and local at a slow speed, and structure is simple, result is accurate, applicability is wide.
Description
Technical field
The utility model relates to technical field of power systems, particularly relates to a kind of hybrid simulation interface and has the electric system hybrid real-time simulation equipment of this interface.
Background technology
The interconnected scale of current power system realm is increasingly huge, and interregional association strengthens; Based on the HVDC (High Voltage Direct Current) transmission system of high-power electric and electronic technology and the extensive application of novel flexible AC transmission system FACTS device, make to reflect that the dynamic process of different physical features is interweaved together.The new situations of power system development are had higher requirement to emulation technology, require the interaction temporarily surely between the accurate reflecting regional electrical network of dynamic perfromance, between Iarge-scale system and local system can simulating extensive interacted system in a simulation process on the one hand; On the other hand, local fast response characteristic can be simulated again simultaneously reflect its electromagnetic transient.
And emulator of the prior art, due to some restrictions, can not real-time simulation be carried out.In addition, because the computing method of interface are simple, there is the defect that error is large, be unsuitable for macroreticular simulation study.
Therefore, not enough for prior art, a kind of hybrid simulation interface is provided and there is the electric system hybrid real-time simulation equipment of this interface very necessary to overcome prior art deficiency.
Summary of the invention
The purpose of this utility model is to avoid the deficiencies in the prior art part and provides a kind of hybrid simulation interface and have the electric system hybrid real-time simulation equipment of this interface, Research on Real-time Simulation can be carried out to the characteristic of alternating current-direct current electrical network, and have the advantages that simulation result is accurate, applicability is broad.
Above-mentioned purpose of the present utility model is realized by following technological means.
A kind of hybrid simulation interface, be connected between real-time electromechanical transient emulation equipment and real-time electromagnetic transient simulation equipment, for carrying out closed loop alternately with real-time electromagnetic transient simulation equipment, real-time electromechanical transient emulation equipment, this hybrid simulation interface is provided with the first dynamic equivalent circuit, the second dynamic equivalent circuit and sequential circuit;
Described sequential circuit is connected with described first dynamic equivalent circuit, described second dynamic equivalent circuit respectively;
The ABC phase-splitting controlled voltage source data terminal that input end and the real-time electromechanical transient emulation equipment of described first dynamic equivalent circuit export is connected, and the described output terminal of the first dynamic equivalent circuit is connected with the interface voltage data input pin of electromagnetic transient simulation equipment;
The positive negative zero three sequence interface power data terminal that input end and the real-time electromagnetic transient simulation equipment of described second dynamic equivalent circuit export is connected, and the output terminal of described second dynamic equivalent circuit is connected with the interface power data input pin of real-time electromechanical transient emulation equipment.
Above-mentioned first dynamic equivalent circuit is Dai Weinan dynamic equivalent circuit, and its circuit parameter is specially:
The former network equation of system is
;
Network impedance matrix is
;
Equivalent impedance is
;
Equivalent electromotive force is
;
In formula,
vfor network equation node voltage vector,
pfor network equation node Injection Current vector,
the node-port associations vector of network,
bus admittance matrix,
it is nodal impedance matrix.
Above-mentioned second dynamic equivalent circuit is dynamic power source model, and in real-time electromechanical transient emulation equipment, the value node such as to arrange is BQ type node.
The time step of above-mentioned sequential circuit is set to 10ms.
A kind of electric system hybrid real-time simulation equipment is provided, is provided with the real-time electromagnetic transient simulation equipment for carrying out real-time EM transient calculation to the power electronics local element part of studied alternating current-direct current electrical network, for carrying out the real-time electromechanical transient emulation equipment of real-time electromechanical Transient calculation and hybrid simulation interface as above to the AC network part of studied alternating current-direct current electrical network;
Described hybrid simulation interface is two-way to be connected between described real-time electromagnetic transient simulation equipment and described real-time electromechanical transient emulation equipment, by dynamic transport after the dynamic data equivalence of AC network part in electromechanical transient system to described real-time electromagnetic transient simulation equipment, and by dynamic transport after the dynamic data equivalence of power electronics local element in real-time electromagnetic transient simulation equipment to described real-time electromechanical transient emulation equipment.
Studied alternating current-direct current electrical network is divided into AC network part and power electronics local element part at HVDC change of current bus or FACTS dedicated transformer place, AC network part is calculated by the capable real-time electromechanical transient emulation of real-time electromechanical transient emulation equipment, and power electronics local element part carries out real-time electromagnetic transient simulation calculating by real-time electromagnetic transient simulation equipment.
onstating real-time electromagnetic transient simulation equipment is RTDS analogue system, and described real-time electromechanical transient emulation equipment is the real-time electromechanical transient emulation equipment based on UDC.
Hybrid simulation interface of the present utility model, be connected between real-time electromechanical transient emulation equipment and real-time electromagnetic transient simulation equipment, for carrying out closed loop alternately with real-time electromagnetic transient simulation equipment, real-time electromechanical transient emulation equipment, this hybrid simulation interface is provided with the first dynamic equivalent circuit, the second dynamic equivalent circuit and sequential circuit; Described sequential circuit is connected with described first dynamic equivalent circuit, described second dynamic equivalent circuit respectively; The ABC phase-splitting controlled voltage source data terminal that input end and the real-time electromechanical transient emulation equipment of described first dynamic equivalent circuit export is connected, and the described output terminal of the first dynamic equivalent circuit is connected with the interface voltage data input pin of electromagnetic transient simulation equipment; The positive negative zero three sequence interface power data terminal that input end and the real-time electromagnetic transient simulation equipment of described second dynamic equivalent circuit export is connected, and the output terminal of described second dynamic equivalent circuit is connected with the interface power data input pin of real-time electromechanical transient emulation equipment.This hybrid simulation interface can realize real-time electromagnetic transient simulation equipment and connect with real-time electromechanical transient emulation equipment is two-way, by dynamic transport after the dynamic data equivalence of AC network part in electromechanical transient system to described real-time electromagnetic transient simulation equipment, and by dynamic transport after the dynamic data equivalence of power electronics local element in real-time electromagnetic transient simulation equipment to described real-time electromechanical transient emulation equipment.Can simulate the transient stability characteristic of extensive interacted system with the interaction between reflecting regional electrical network, between Iarge-scale system and local system in a simulation process, the quick electromagnetic transient response process of partial electric grid or element of also simultaneously simulating is to reflect as HVDC, FACTS device high-speed switch process characteristic.The electromagnetic transient that the large-scale electromechanical transient response of real-time simulation and local respond fast, has the advantages that structure is simple, result is accurate, applicability is wide.
Electric system hybrid real-time simulation equipment of the present utility model, is provided with the real-time electromagnetic transient simulation equipment for carrying out real-time EM transient calculation to the power electronics local element part of studied alternating current-direct current electrical network, for carrying out the real-time electromechanical transient emulation equipment of real-time electromechanical Transient calculation and hybrid simulation interface as above to the AC network part of studied alternating current-direct current electrical network; Described hybrid simulation interface is two-way to be connected between described real-time electromagnetic transient simulation equipment and described real-time electromechanical transient emulation equipment, by dynamic transport after the dynamic data equivalence of AC network part in electromechanical transient system to described real-time electromagnetic transient simulation equipment, and by dynamic transport after the dynamic data equivalence of power electronics local element in real-time electromagnetic transient simulation equipment to described real-time electromechanical transient emulation equipment.Can simulate the transient stability characteristic of extensive interacted system with the interaction between reflecting regional electrical network, between Iarge-scale system and local system in a simulation process, the quick electromagnetic transient response process of partial electric grid or element of also simultaneously simulating is to reflect as HVDC, FACTS device high-speed switch process characteristic.The electromagnetic transient that the large-scale electromechanical transient response of real-time simulation and local respond fast, has the advantages that structure is simple, result is accurate, applicability is wide.
Accompanying drawing explanation
Utilize accompanying drawing to be further described the utility model, but the content in accompanying drawing is not formed any restriction of the present utility model.
Fig. 1 is the structural representation of a kind of electric system hybrid real-time simulation of the utility model equipment.
Fig. 2 is the subnetting interface diagram of the alternating current-direct current electrical network of the utility model research.
Fig. 3 is the utility model electromechanical transient simulation computational mathematics model structure figure.
Fig. 4 is the utility model real-time electromechanical transient state program circuit schematic diagram.
Fig. 5 is that the utility model AC network is at electro-magnetic transient side equivalent circuit schematic diagram.
Embodiment
With the following Examples the utility model is further described.
embodiment 1.
A kind of hybrid simulation interface, as shown in Figure 1, is connected to real-time electromechanical transient emulation equipment and in real time between electromagnetic transient simulation equipment, for real-time electromagnetic transient simulation equipment, that real-time electromechanical transient emulation equipment carries out closed loop is mutual.
This this hybrid simulation interface is provided with the first dynamic equivalent circuit, the second dynamic equivalent circuit and sequential circuit; Sequential circuit is connected with the first dynamic equivalent circuit, described second dynamic equivalent circuit respectively.The ABC phase-splitting controlled voltage source data terminal that input end and the real-time electromechanical transient emulation equipment of the first dynamic equivalent circuit export is connected, and the described output terminal of the first dynamic equivalent circuit is connected with the interface voltage data input pin of electromagnetic transient simulation equipment; The positive negative zero three sequence interface power data terminal that input end and the real-time electromagnetic transient simulation equipment of the second dynamic equivalent circuit export is connected, and the output terminal of described second dynamic equivalent circuit is connected with the interface power data input pin of real-time electromechanical transient emulation equipment.
In the every step for the moment of sequential circuit control, beginning situation and parameter renewal are opened in the work of described real-time electromagnetic transient simulation equipment, real-time electromechanical transient emulation equipment, the first dynamic equivalent circuit and the second dynamic equivalent circuit;
When at each time, step starts, real-time electromagnetic transient simulation equipment, real-time electromechanical transient emulation equipment carry out original state renewal, and the first dynamic equivalent circuit and the second dynamic equivalent circuit carry out parameter renewal simultaneously;
In every step for the moment, first dynamic equivalent circuit receive described real-time electromechanical transient emulation equipment conveying current time step ABC phase-splitting controlled voltage source signal and after carrying out equivalent calculation, the result after equivalent calculation is delivered to described real-time electromagnetic transient simulation equipment as interface voltage, real-time electromagnetic transient simulation equipment carries out current electromagnetic Transient calculation according to the interface voltage of described first dynamic equivalent circuit conveying, and using the real-time electromagnetic transient simulation equipment original state that the described real-time electromagnetic transient simulation equipment of current electromagnetic transient calculation result renewal walked as lower a period of time;
Second dynamic equivalent circuit receives the current positive negative zero three sequence interface power of described real-time electromagnetic transient simulation equipment conveying and after carrying out equivalent calculation, the result after equivalent calculation is delivered to described real-time electromechanical transient emulation equipment as interface power, real-time electromechanical transient emulation equipment carries out current electromechanical transient calculating according to the interface power of described second dynamic equivalent circuit conveying, and upgrades using current electromechanical transient result of calculation the real-time electromechanical transient emulation equipment original state that described real-time electromechanical transient emulation equipment walks as lower a period of time;
Under the control of sequential circuit, the closed loop that real-time electromagnetic transient simulation equipment, real-time electromechanical transient emulation equipment, the first dynamic equivalent circuit and the second dynamic equivalent circuit start step in lower a period of time is mutual, until simulation time terminates, stops mutual.
First dynamic equivalent circuit is Dai Weinan dynamic equivalent circuit, adopts ABC phase-splitting voltage source model, each mutual time step upgrade every phase voltage source amplitude, phase place and internal impedance real part, imaginary part.
Its circuit parameter is specially:
If the former network equation of system is
:
Network impedance matrix is
;
Equivalent impedance is
;
Equivalent electromotive force is
;
In formula,
vfor network equation node voltage vector,
pfor network equation node Injection Current vector,
the node-port associations vector of network,
bus admittance matrix,
it is nodal impedance matrix.
Second dynamic equivalent circuit is dynamic power source model, adopt three sequence amount injection methods, upgrade the interface power amount of this time step participation electromechanical transient equation calculating in each mutual sequential, the utility model employing instantaneous value calculates the quick transmission that three sequence power can realize interface data conversion.
Second dynamic equivalent circuit is dynamic power source model, and in electromechanical transient network, the value node such as to arrange is BQ type node.As shown in Figure 5, the first dynamic equivalent circuit and the second dynamic equivalent circuit lay respectively at the equivalent circuit as this side analogue system in offside analogue system.Thevenin's equivalence circuit is in parallel with TSA AC network frequency dependence equivalent circuit (FDNE), can reflect the high frequency response characteristic of AC network to circuit 0-2000Hz during EMT electromagnetism side calculation of fault.
The mutual sequential control of interface data is undertaken by sequential circuit, control the interface node voltage magnitude that calculated by electromechanical transient in each electromechanical transient Time step finish time and transmission of phase to electro-magnetic transient side, the interface node bus of EM transient calculation injection active power and reactive power are transferred to electromechanical transient side simultaneously
Concrete, the time step of sequential circuit is set to 10ms.
Concrete, the Thevenin's equivalence impedance that electromechanical transient side (TSA) will often walk (10ms) for the moment and calculate
with equivalent electromotive force
send electro-magnetic transient side (EMT) to.Electro-magnetic transient side (EMT) exchanges three sequence quantity of power by the interface that first-harmonic three sequence amount transfer algorithm calculates and sends into electromechanical transient side (TSA) simultaneously.
When electromechanical transient computation process carries out the next one after obtaining interface and exchanging three sequence power amount information, the electromechanical transient simulation of step calculates.EM transient calculation process is after the Thevenin's equivalence electromotive force obtaining electromechanical transient network and equivalent impedance simultaneously, and the electromagnetic transient simulation carrying out step during the next one calculates.
After mutual from electromechanical transient side (TSA) and electro-magnetic transient side (EMT) closed loop, every 10ms constantly repeats above reciprocal process until emulate and terminate.
Before emulation terminates, electromechanical transient side (TSA) and electro-magnetic transient side (EMT) can repeat to do various symmetric fault, asymmetric fault.
This hybrid simulation interface can realize real-time electromagnetic transient simulation equipment and connect with real-time electromechanical transient emulation equipment is two-way, by dynamic transport after the dynamic data equivalence of AC network part in electromechanical transient system to described real-time electromagnetic transient simulation equipment, and by dynamic transport after the dynamic data equivalence of power electronics local element in real-time electromagnetic transient simulation equipment to described real-time electromechanical transient emulation equipment.Can simulate the transient stability characteristic of extensive interacted system with the interaction between reflecting regional electrical network, between Iarge-scale system and local system in a simulation process, the quick electromagnetic transient response process of partial electric grid or element of also simultaneously simulating is to reflect as HVDC, FACTS device high-speed switch process characteristic.The electromagnetic transient that the large-scale electromechanical transient response of real-time simulation and local respond fast, has the advantages that structure is simple, result is accurate, applicability is wide.
embodiment 2.
A kind of electric system hybrid real-time simulation equipment, there is hybrid simulation interface as described in Example 1, as shown in Figure 1, the real-time electromagnetic transient simulation equipment for carrying out real-time EM transient calculation to the power electronics local element part of studied alternating current-direct current electrical network is provided with, for carrying out the real-time electromechanical transient emulation equipment of real-time electromechanical Transient calculation and hybrid simulation interface as above to the AC network part of studied alternating current-direct current electrical network.
Hybrid simulation interface is two-way to be connected between described real-time electromagnetic transient simulation equipment and described real-time electromechanical transient emulation equipment, by dynamic transport after the dynamic data equivalence of AC network part in electromechanical transient system to described real-time electromagnetic transient simulation equipment, and by dynamic transport after the dynamic data equivalence of power electronics local element in real-time electromagnetic transient simulation equipment to described real-time electromechanical transient emulation equipment.
As shown in Figure 2, studied alternating current-direct current electrical network is divided into AC network part and power electronics local element part at HVDC change of current bus or FACTS dedicated transformer place, AC network part is calculated by the capable real-time electromechanical transient emulation of real-time electromechanical transient emulation equipment, and power electronics local element part carries out real-time electromagnetic transient simulation calculating by real-time electromagnetic transient simulation equipment.
Real-time electromagnetic transient simulation equipment is RTDS emulator, and real-time electromechanical transient emulation equipment is the real-time electromechanical transient emulation equipment based on UDC.
Carried out the method emulated by above-mentioned electric system hybrid real-time simulation equipment, carry out in the following way,
(1) emulation prepares the moment, and real-time electromagnetic transient simulation equipment and real-time electromechanical transient emulation equipment separately independent operating are stablized, and start hybrid simulation;
(2) described real-time electromagnetic transient simulation equipment, real-time electromechanical transient emulation equipment and hybrid simulation interface carry out original state renewal;
(3) dynamic data in real-time electromechanical transient emulation equipment is by being delivered to described real-time electromagnetic transient simulation equipment after the process of hybrid simulation interface equivalence, real-time electromechanical transient emulation equipment carries out current electromagnetic Transient calculation, and using the real-time electromagnetic transient simulation equipment original state that the described real-time electromagnetic transient simulation equipment of current electromagnetic transient calculation result renewal walked as lower a period of time; Dynamic data simultaneously in electromagnetic transient simulation system is by being delivered to described real-time electromechanical transient emulation equipment after the process of hybrid simulation interface equivalence, described real-time electromechanical transient emulation equipment carries out current electromechanical transient calculating, and upgrades using current electromechanical transient result of calculation the real-time electromechanical transient emulation equipment original state that described real-time electromechanical transient emulation equipment walks as lower a period of time;
The exchange process of continuous repetition above-mentioned steps (2) to (3), until simulation time terminates, stops mutual.
This technology is a kind of electric system hybrid real-time simulation equipment, is made up of real-time electromagnetic transient simulation equipment, real-time electromechanical transient emulation equipment and hybrid simulation interface.Studied alternating current-direct current electrical network is divided into AC network part and power electronics local element part at HVDC change of current bus or FACTS dedicated transformer place, AC network part is placed in real-time electromechanical transient emulation equipment and carries out the calculating of real-time electromechanical transient emulation, and power electronics local element part (HVDC or FACTS) is placed in real-time electromagnetic transient simulation equipment and carries out real-time electromagnetic transient simulation calculating.Hybrid simulation interface (IF) realizes the dynamic equivalent in AC network part electromechanical transient side TSA to electro-magnetic transient side EMT, and the dynamic equivalent in power electronics local element electro-magnetic transient side EMT to electromechanical transient side TSA.Can simulate the transient stability characteristic of extensive interacted system with the interaction between reflecting regional electrical network, between Iarge-scale system and local system in a simulation process, the quick electromagnetic transient response process of partial electric grid or element of also simultaneously simulating is to reflect as HVDC, FACTS device high-speed switch process characteristic.The electromagnetic transient that the large-scale electromechanical transient response of real-time simulation and local respond fast, has the advantages that structure is simple, result is accurate, applicability is wide.
Real-time electromechanical transient emulation equipment, the expression formula of whole electric system comprises Synchronous generator, the exciter control system relevant to Synchronous generator and prime mover and governing system, transformer and power transmission line AC network, load, other dynamic elements, as shown in Figure 3, electromechanical transient equation solution comprises the differential equation (1) and network algebra equation (2):
……（1）；
……（2）；
Differential equation group (1) comprising:
(1) differential equation of each synchronous generator transient state and time transient potential Changing Pattern is described.
(2) what describe the motion of each synchronous generator rotor waves equation.
(3) differential equation of excitation control system dynamic perfromance in Synchronous generator is described.
(4) differential equation of Synchronous generator prime mover and dynamic characteristic of governing system thereof is described.
(5) differential equation of each induction motor and synchronous motor dynamic load characteristic is described.
Network algebra system of equations (2) comprising:
(1) electric power networks equation, is namely described in common parameter coordinate system
relation between lower node voltage and node Injection Current.
(2) each synchronous generator stator voltage equation equation (is based upon respective
under coordinate system) and
coordinate system with
transformation equation between coordinate system.
Real-time electromechanical transient emulation flow process as described in Figure 4, specifically comprises the steps:
First raw data is inputted, mainly comprise the requirement (as simulation step length, emulation T.T. etc.) etc. of system element model (as generator adopts the model etc. of model order, speed governing exciter control system), parameter (comprising Load flow calculation and the required each amount of multilayer output feedback network, as line parameter circuit value, generator parameter etc.), network topological information (mainly circuit two ends node number/title etc.), stability analysis.
Carry out the Load flow calculation of system whole-network according to the parameter information of input, obtain the trend distributed intelligence of the voltage of each node, phase angle and the whole network, for multilayer output feedback network is below ready.
Electrical network bus admittance matrix is in the steady state formed according to network element parameter and network topology.By generator transient admittance Y
gy equivalent with constant conductance part in load
lbe incorporated in the admittance matrix of system.This step mainly forms T
nall variable initial values needed for moment network multilayer output feedback network are also prepare for system transient modelling afterwards calculates.
Judge whether system has disturbance or fault to occur (comprising circuit, the three-phase fault of node and unbalanced fault etc.).If had, then revise current network admittance matrix and the differential equation according to failure condition or excitation parameter, then again solve network equation to calculate each node voltage.If undisturbed or fault occur, then directly proceed to step
.
Step in figure
it is the core of Transient calculation.Time-domain simulation method according to adopting carries out T
nto T
n+1time step calculating, ask for T
n+1time the quantity of state of etching system and algebraic quantity.Differential equation part can adopt implicit trapezoid method, improved Euler method etc., and Algebraic Equation set and the differential equation both can adopt simultaneous solution also can adopt the method for iterative.
After the calculating walked when completing one, judge whether emulation has arrived emulation T.T. T.T., if arrived, proceed to
do the process such as Output rusults, emulation terminates; If not, judge whether system is stablized, if unstability, proceed to equally
do the process such as Output rusults.If simulation time does not arrive and system is still stable, show that the transient emulation of system calculates and also should continue, update time, axle, proceeded to next step calculating
.
Hybrid simulation interface is provided with the first dynamic equivalent circuit, the second dynamic equivalent circuit and sequential circuit.
In the every step for the moment of sequential circuit control, beginning situation and parameter renewal are opened in the work of described real-time electromagnetic transient simulation equipment, real-time electromechanical transient emulation equipment, the first dynamic equivalent circuit and the second dynamic equivalent circuit;
When at each time, step starts, real-time electromagnetic transient simulation equipment, real-time electromechanical transient emulation equipment carry out original state renewal, and the first dynamic equivalent circuit and the second dynamic equivalent circuit carry out parameter renewal simultaneously;
In every step for the moment, first dynamic equivalent circuit receive described real-time electromechanical transient emulation equipment conveying current time step ABC phase-splitting controlled voltage source signal and after carrying out equivalent calculation, the result after equivalent calculation is delivered to described real-time electromagnetic transient simulation equipment as interface voltage, described real-time electromagnetic transient simulation equipment carries out current electromagnetic Transient calculation according to the interface voltage of described first dynamic equivalent circuit conveying, and using the real-time electromagnetic transient simulation equipment original state that the described real-time electromagnetic transient simulation equipment of current electromagnetic transient calculation result renewal walked as lower a period of time,
Second dynamic equivalent circuit receives the current positive negative zero three sequence interface power of described real-time electromagnetic transient simulation equipment conveying and after carrying out equivalent calculation, the result after equivalent calculation is delivered to described real-time electromechanical transient emulation equipment as interface power, described real-time electromechanical transient emulation equipment carries out current electromechanical transient calculating according to the interface power of described second dynamic equivalent circuit conveying, and upgrades using current electromechanical transient result of calculation the real-time electromechanical transient emulation equipment original state that described real-time electromechanical transient emulation equipment walks as lower a period of time;
Under the control of sequential circuit, the closed loop that described real-time electromagnetic transient simulation equipment, real-time electromechanical transient emulation equipment, the first dynamic equivalent circuit and the second dynamic equivalent circuit start step in lower a period of time is mutual, until simulation time terminates, stops mutual.
First dynamic equivalent circuit is Dai Weinan dynamic equivalent circuit, adopts ABC phase-splitting voltage source model, each mutual time step upgrade every phase voltage source amplitude, phase place and internal impedance real part, imaginary part.
Its circuit parameter is specially:
If the former network equation of system is
:
Network impedance matrix is
;
Equivalent impedance is
;
Equivalent electromotive force is
;
In formula,
vfor network equation node voltage vector,
pfor network equation node Injection Current vector,
the node-port associations vector of network,
bus admittance matrix,
it is nodal impedance matrix.
Second dynamic equivalent circuit is dynamic power source model, adopt three sequence amount injection methods, upgrade the interface power amount of this time step participation electromechanical transient equation calculating in each mutual sequential, the utility model employing instantaneous value calculates the quick transmission that three sequence power can realize interface data conversion.
Second dynamic equivalent circuit is dynamic power source model, and in electromechanical transient network, the value node such as to arrange is BQ type node.As shown in Figure 5, the first dynamic equivalent circuit and the second dynamic equivalent circuit lay respectively at the equivalent circuit as this side analogue system in offside analogue system.Thevenin's equivalence circuit is in parallel with TSA AC network frequency dependence equivalent circuit (FDNE), can reflect the high frequency response characteristic of AC network to circuit 0-2000Hz during EMT electromagnetism side calculation of fault.
The mutual sequential control of interface data is undertaken by sequential circuit.
Concrete, the Thevenin's equivalence impedance that electromechanical transient side (TSA) will often walk (10ms) for the moment and calculate
with equivalent electromotive force
send electro-magnetic transient side (EMT) to.Electro-magnetic transient side (EMT) exchanges three sequence quantity of power by the interface that first-harmonic three sequence amount transfer algorithm calculates and sends into electromechanical transient side (TSA) simultaneously.
When electromechanical transient computation process carries out the next one after obtaining interface and exchanging three sequence power amount information, the electromechanical transient simulation of step calculates.EM transient calculation process is after the Thevenin's equivalence electromotive force obtaining electromechanical transient network and equivalent impedance simultaneously, and the electromagnetic transient simulation carrying out step during the next one calculates.
After mutual from electromechanical transient side (TSA) and electro-magnetic transient side (EMT) closed loop, every 10ms constantly repeats above reciprocal process until emulate and terminate.
Before emulation terminates, electromechanical transient side (TSA) and electro-magnetic transient side (EMT) can repeat to do various symmetric fault, asymmetric fault.
The utility model can simulate the transient stability characteristic of extensive interacted system with the interaction between reflecting regional electrical network, between Iarge-scale system and local system in a simulation process, and the quick electromagnetic transient response process of partial electric grid or element of also simultaneously simulating is to reflect as HVDC, FACTS device high-speed switch process characteristic.The electromagnetic transient that the large-scale electromechanical transient response of real-time simulation and local respond fast, has the advantages that structure is simple, result is accurate, applicability is wide.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model but not restriction to the utility model protection domain; although be explained in detail the utility model with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to the technical solution of the utility model or equivalent replacement, and not depart from essence and the scope of technical solutions of the utility model.
Claims (5)
1. a hybrid simulation interface, be connected between real-time electromechanical transient emulation equipment and real-time electromagnetic transient simulation equipment, for carrying out closed loop alternately with real-time electromagnetic transient simulation equipment, real-time electromechanical transient emulation equipment, it is characterized in that: be provided with the first dynamic equivalent circuit, the second dynamic equivalent circuit and sequential circuit;
Described sequential circuit is connected with described first dynamic equivalent circuit, described second dynamic equivalent circuit respectively;
The ABC phase-splitting controlled voltage source data terminal that input end and the real-time electromechanical transient emulation equipment of described first dynamic equivalent circuit export is connected, and the described output terminal of the first dynamic equivalent circuit is connected with the interface voltage data input pin of electromagnetic transient simulation equipment;
The positive negative zero three sequence interface power data terminal that input end and the real-time electromagnetic transient simulation equipment of described second dynamic equivalent circuit export is connected, and the output terminal of described second dynamic equivalent circuit is connected with the interface power data input pin of real-time electromechanical transient emulation equipment;
Described first dynamic equivalent circuit is Dai Weinan dynamic equivalent circuit, and its circuit parameter is specially:
The former network equation of system is
;
Network impedance matrix is
;
Equivalent impedance is
;
Equivalent electromotive force is
;
In formula,
vfor network equation node voltage vector,
pfor network equation node Injection Current vector,
the node-port associations vector of network,
bus admittance matrix,
it is nodal impedance matrix;
Described second dynamic equivalent circuit is dynamic power source model, and in real-time electromechanical transient emulation equipment, the value node such as to arrange is BQ type node.
2. hybrid simulation interface according to claim 1, is characterized in that: the time step of described sequential circuit is set to 10ms.
3. an electric system hybrid real-time simulation equipment, is characterized in that: be provided with the real-time electromagnetic transient simulation equipment for carrying out real-time EM transient calculation to the power electronics local element part of studied alternating current-direct current electrical network, for carrying out the real-time electromechanical transient emulation equipment of real-time electromechanical Transient calculation and the hybrid simulation interface as described in claim 1 or 2 any one to the AC network part of studied alternating current-direct current electrical network;
Described hybrid simulation interface is two-way to be connected between described real-time electromagnetic transient simulation equipment and described real-time electromechanical transient emulation equipment, by dynamic transport after the dynamic data equivalence of AC network part in electromechanical transient system to described real-time electromagnetic transient simulation equipment, and by dynamic transport after the dynamic data equivalence of power electronics local element in real-time electromagnetic transient simulation equipment to described real-time electromechanical transient emulation equipment.
4. electric system hybrid real-time simulation equipment according to claim 3, it is characterized in that: studied alternating current-direct current electrical network is divided into AC network part and power electronics local element part at HVDC change of current bus or FACTS dedicated transformer place, AC network part is calculated by the capable real-time electromechanical transient emulation of real-time electromechanical transient emulation equipment, and power electronics local element part carries out real-time electromagnetic transient simulation calculating by real-time electromagnetic transient simulation equipment.
5. electric system hybrid real-time simulation equipment according to claim 4, is characterized in that: described real-time electromagnetic transient simulation equipment is RTDS analogue system, and described real-time electromechanical transient emulation equipment is the real-time electromechanical transient emulation equipment based on UDC.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259781A (en) * | 2015-09-25 | 2016-01-20 | 上海交通大学 | Electric power system mixed simulation system for different types of real-time digital simulation apparatuses |
| CN110909468A (en) * | 2019-11-22 | 2020-03-24 | 清华大学 | Thermoelectric interface interaction method for dynamic hybrid simulation of comprehensive energy network |
| CN113110099A (en) * | 2021-03-04 | 2021-07-13 | 清华大学 | Multi-mode integrated hybrid real-time simulation platform |
-
2014
- 2014-06-18 CN CN201420323566.3U patent/CN204229391U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259781A (en) * | 2015-09-25 | 2016-01-20 | 上海交通大学 | Electric power system mixed simulation system for different types of real-time digital simulation apparatuses |
| CN110909468A (en) * | 2019-11-22 | 2020-03-24 | 清华大学 | Thermoelectric interface interaction method for dynamic hybrid simulation of comprehensive energy network |
| CN110909468B (en) * | 2019-11-22 | 2021-04-23 | 清华大学 | Thermoelectric interface interaction method for dynamic hybrid simulation of comprehensive energy network |
| CN113110099A (en) * | 2021-03-04 | 2021-07-13 | 清华大学 | Multi-mode integrated hybrid real-time simulation platform |
| CN113110099B (en) * | 2021-03-04 | 2023-03-14 | 清华大学 | Multi-mode integrated mixed real-time simulation platform |
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