CN107947152A - A kind of long term dynamics emulation stability strategy modeling method based on virtual power grid - Google Patents
A kind of long term dynamics emulation stability strategy modeling method based on virtual power grid Download PDFInfo
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- CN107947152A CN107947152A CN201711066620.5A CN201711066620A CN107947152A CN 107947152 A CN107947152 A CN 107947152A CN 201711066620 A CN201711066620 A CN 201711066620A CN 107947152 A CN107947152 A CN 107947152A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention discloses a kind of long term dynamics based on virtual power grid to emulate stability strategy modeling method, is related to power system security stability analysis assessment technology field.The long term dynamics emulation stability strategy modeling method based on virtual power grid, by building the virtual power grid being made of the virtual electrical equipment such as virtual circuit, virtual load, virtual synchronous generator, realize that the gap bridge of fault distinguishing condition and control measure signal is transferred in PSD FDS program safety automatics models and stability control strategy model, further complete automatic safety device model and the combination of stability control strategy model is called, realize the modeling and verification to the more criterion stability strategies of complex electric network.
Description
Technical field
The invention belongs to power system security stability analysis assessment technology field, more particularly to it is a kind of based on virtual power grid
Long term dynamics emulate stability strategy modeling method.
Background technology
Power industry is the basic activity of modern society, and the operation of electric system is related to each side of social and economic activities
Face, safety, power supply that is economic, continuing, stablize are the basic demands to work about electric power.Due to the various equipment of electric system,
Including the primary equipments such as generator, transformer, transmission line of electricity, breaker and matched secondary device, difference can all occur
The failure of type, so as to influence electric system normal operation and to user's normal power supply.In order to ensure the safety fortune of electric system
OK, it will usually which in electric system important node, supporting safety and stability control device and system (hereinafter referred to as stable system are set
System), the real-time running state of in-service monitoring power grid, for the various failures that may occur according to the safety and stability pre-set
Tactful (abbreviation stability strategy) implements real-time early warning and dynamic decision, prevents power grid accident from magnifying, and is transported for power system security
Row provides reliable guarantee.
In order to ensure the security and stability of electric system in actual motion, the method that inconvenience is tested using online physical perturbation
Dynamic behaviour to electric system is studied.The main method using power system simulation software off-line calculation is to electric power at present
The dynamic behaviour of system and device carries out simulation study.It can be divided into six major classes for the model of electric system stability strategy:Dress
Put class, monitoring class, pressing plate class, public data class, control measure class and stability control strategy class.Electric power system full dynamic simulation journey
The electromechanical transient of electric system, medium and long term dynamic process can organically be united and carry out numeral by sequence (PSD-FDS)
Simulation, is the currently the only simulation calculation instrument that can implement stability strategy modeling.
PSD-FDS provides automatic safety device model and 2 big class model of stability control strategy model is used for building for stability strategy
Mould.Wherein automatic safety device model includes overload control apparatus model (STAB OL), low-frequency load shedding (off-the-line) model
(STAB LF), low-voltage load sheding (off-the-line) (STAB LV), high-frequency cutting machine (off-the-line) model (STAB HF), cross crush-cutting machine (off-the-line)
(STAB HV) and Out-of-Step Splitting Systems (STAB OS) model, using automatic safety device functional mode (such as STAB LF cards)+control
The pattern of measure model (STAB OUT cards) processed collectively constitutes complete model, can be good at accordingly filling in covering real system
The function of putting.One complete security and stability control Policy model usually by a power plant and substation's information card, some section information cards, cut
Machine order card, cutting load pro rate card, strategy card and control measure card composition.Wherein, if a complete control strategy by
Dry strategy trigger condition card (be between each strategy and logic) and some control measure cards (corresponding different control objects) are realized and controlled
Function processed.Automatic safety device model does not support condition judgment arranged side by side, and the combination of stability control strategy model supports trigger condition is patrolled
Collect and judge；Automatic safety device model and stability control strategy model cootrol measure card function be not also overlapping, and function cannot be covered mutually.
Due to the limitation of function of PSD-FDS programs itself, automatic safety device model and stability control strategy model cannot mix
Use together.The differentiation section N-M failures of stability control strategy trigger condition model (STAB COND) offer, differentiate branch trouble
Type, differentiate that exchange branch throwing stops state, differentiates exchange branch transmission power, differentiates section transmission power and automatic safety device
Fault distinguishing condition (overload, low frequency, low pressure, high frequency, overvoltage) in model is simultaneously misaligned, and automatic safety device model
There is relatively independent control measure card with stability control strategy model, it is impossible to mutually call.In view of in modern power systems actual motion
Stability strategy usually started by multiple strategies and judge that object and a plurality of anti-error criterion are formed with certain logical relation, and implement
Complicated control measure, and the model provided in PSD-FDS be still not enough to be completely covered at present it is complicated stable in real system
Strategy and control action.
Based on this, the present invention proposes a kind of long term dynamics emulation stability strategy modeling method based on virtual power grid, borrows
Help virtual power grid to build gap bridge circuit, realize the function of intermediate relay, solve automatic safety device model and stability control strategy mould
The problem of type hybrid modeling, expand the scope of application that PSD-FDS realizes the modeling of Complex Power Network stability strategy.
The content of the invention
In view of the deficiencies of the prior art, in order to realize the peace by the complicated stability strategy that multiple criterions form to electric system
Full operating status is assessed, and the present invention provides a kind of long term dynamics emulation stability strategy modeling side based on virtual power grid
Method, by building the virtual power grid being made of the virtual electrical equipment such as virtual circuit, virtual load, virtual synchronous generator, is realized
The gap bridge of fault distinguishing condition and control measure signal turns in PSD-FDS program safety automatics models and stability control strategy model
Connect, further complete automatic safety device model and the combination of stability control strategy model is called, realize stable to the more criterions of complex electric network
The modeling and verification of strategy.
The present invention is to solve above-mentioned technical problem by the following technical solutions：A kind of middle length based on virtual power grid
Phase dynamic simulation stability strategy modeling method, the modeling method are the flow data file * in PSD-FDS mid-long term simulations
.dat the virtual component that the opposite actual emulation power grid of middle addition is not present, structure are used for the virtual power grid for surely controlling signal transmission, borrow
The bridge joint of virtual power grid is helped, realizes interconnecting and mutually calling for automatic safety device model and stability control strategy model.
Further, the virtual component includes virtual circuit, virtual load, virtual synchronous generator.
Further, the operating status of the stability control strategy model inspection actual electric network, implements combinational logic judgement, output
Corresponding control measure；If stability control strategy model meets actual electric network demand, directly to actual electric network output control measure；
If being unsatisfactory for actual electric network constraint judgement and output control condition, to virtual power grid output control measure, change virtual power grid
Operating status, virtual electric network state is further detected by automatic safety device, performing stability control strategy model cannot directly implement
Control measure.The virtual power grid and actual electric network of construction are mutually isolated, and the control output of stability control strategy model does not influence reality
The state of power grid, but triggering automatic safety device can be constructed by varying the operation of circuit, load, generator in virtual power grid
The fault distinguishing condition of action, further acts after automatic safety device model inspection to virtual electric network state changes, implements
Minute wheel time cutting load to actual electric network, cut the control operations such as machine, off-the-line.
Further, the stability control strategy model puts into operation shape according to section N-M failures, branch trouble, exchange branch respectively
State, section transmission power and branch transmission power implement combinational logic judgement, and output cuts machine, cutting load, cut branch, close accordingly
Lock dc bus circuit control measure.
Further, the operating status of the automatic safety device model inspection actual electric network, exports corresponding control and arranges
Apply；If automatic safety device model meets actual electric network demand, directly to actual electric network output control measure；If it is unsatisfactory for
Actual electric network constraint judges and output control condition, then to virtual power grid output control measure, changes the operation shape of virtual power grid
State, further cannot be virtually directly realized by by stability control strategy model inspection with actual electric network state, completion automatic safety device
Combinational logic judges, then exports suitable control measure.The virtual power grid and actual electric network of construction are mutually isolated, safety automation dress
The control output put does not influence the state of actual electric network, but can be by varying the fortune of circuit, load, generator in virtual power grid
OK, the fault distinguishing condition of construction triggering stability control strategy model action, becomes in stability control strategy model inspection to virtual electric network state
Further acted after change, implement cutting branch, cutting load, cut the control operations such as machine, locking DC line to actual electric network.
Further, the automatic safety device model respectively according to overload control apparatus model, low-frequency load shedding model,
Low-voltage load sheding model, high-frequency cutting machine model, cross crush-cutting machine model, Out-of-Step Splitting Systems model progress fault distinguishing, corresponding point of output
Round cuts machine, cutting load, cuts branch, islanding control measure.
Further, the stability strategy combined crosswise of the stability control strategy model and automatic safety device model, is ensureing
Signal realized under the conditions of transmitting logical relation clearly automatic safety device model and stability control strategy model interconnect and phase
Mutually call, realize the support to the complicated stable combinational logic Rule of judgment of actual electric network and output measure.
Compared with prior art, the long term dynamics emulation stability strategy modeling provided by the present invention based on virtual power grid
Method, has the advantages that：
1st, the virtual component for building virtual network provided bridge signal, realized that stability control strategy model calls automatic safety device
The control measure of model, or automatic safety device model call the control measure of stability control strategy model；
2nd, the virtual component for building virtual network provided bridge signal, realized that stability control strategy model utilizes automatic safety device
The fault distinguishing condition of model, or realize that automatic safety device model calls stability control strategy model to complete trigger condition logical groups
Close；
3rd, virtual network uses a variety of tactful combined crosswises, expands the support scope to the modeling of actual electric network stability strategy,
Complex logic combination undefined in PSD-FDS and control output model can be emulated, reduces the reality of complicated stability strategy modeling
Apply difficulty；
4th, virtual power grid and actual electric network are separate, and virtual power grid only plays the role of the bridge joint of M signal, does not influence
Trend, stabilization, transient state and the long term dynamics simulation calculation of actual electric network；
5th, it can realize the modularization of virtual power grid and combinational logic, accelerate the stability strategy modeling process of actual electric network.
Brief description of the drawings
, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of technical scheme
It is briefly described, it should be apparent that, drawings in the following description are only one embodiment of the present of invention, general for this area
For logical technical staff, without creative efforts, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of structural representation of the long term dynamics emulation stability strategy modeling method based on virtual power grid of the present invention
Figure；
Wherein：1- stability control strategy models, 2- automatic safety device models；
Fig. 2 is the system wiring schematic diagram of the embodiment of the present invention.
Embodiment
With reference to the attached drawing in the embodiment of the present invention, the technical solution in the present invention is clearly and completely described,
Obviously, described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art's all other embodiments obtained on the premise of creative work is not made,
Belong to the scope of protection of the invention.
A kind of as shown in Figure 1, long term dynamics emulation stability strategy modeling based on virtual power grid provided by the present invention
Method, modeling method are that opposite actual emulation power grid is added in the flow data file * .dat of PSD-FDS mid-long term simulations not
The virtual components such as existing virtual circuit, virtual load, virtual synchronous generator, structure are used for the virtual power grid for surely controlling signal transmission,
By the bridge joint of virtual power grid, interconnecting and mutually calling for automatic safety device model 2 and stability control strategy model 1 is realized.
Stability control strategy model 1 detects the operating status of actual electric network, respectively according to section N-M failures, branch trouble, exchange
Put into operation state, section transmission power and branch transmission power of branch implements combinational logic judgement, output is corresponding cut machine, cut it is negative
Lotus, cut branch, locking dc bus circuit control measure；If stability control strategy model 1 meets actual electric network demand, directly to
Actual electric network output control measure；If being unsatisfactory for actual electric network constraint judgement and output control condition, exported to virtual power grid
Control measure, change the operating status of virtual power grid, further detect virtual electric network state by automatic safety device model 2, hold
The control measure that row stability control strategy model 1 cannot directly be implemented.
Automatic safety device model 2 detects the operating status of actual electric network, respectively according to overload control apparatus model, low
Frequency off-load model, low-voltage load sheding model, high-frequency cutting machine model, crush-cutting machine model, Out-of-Step Splitting Systems model excessively carry out fault distinguishing, defeated
Go out corresponding minute wheel cut machine, cutting load, cut branch, islanding control measure；If automatic safety device model 2 meets actual electricity
Net demand, then directly to actual electric network output control measure；If being unsatisfactory for actual electric network constraint judgement and output control condition,
To virtual power grid output control measure, change the operating status of virtual power grid, further by stability control strategy model 1 detect it is virtual and
Actual electric network state, the combinational logic that completing automatic safety device cannot be directly realized by judges, then exports suitable control measure.
The stability strategy combined crosswise of stability control strategy model 1 and automatic safety device model 2, is ensureing signal transmission logic
Relation clearly under the conditions of realize interconnecting and mutually calling for automatic safety device model 2 and stability control strategy model 1, realize
Support to the complicated stable combinational logic Rule of judgment of actual electric network and output measure.
Illustrated by taking the stability strategy of Guangxi region as an example, its wiring schematic diagram is as shown in Figure 2；
Entry condition：Congratulate road I, II line overload, low pressure；
Anti-error criterion：III line of road, He Hui I, II line is congratulated to stop transport；
Policy action：Minute wheel time excision road stone, Huifeng, letter all, Fujian boat station load
, herein must be by increasing relay among virtual since PSD-FDS stability strategies are not supported directly to cut bus load
The mode of device, minute wheel time cutting load is realized using 2 stability strategies, and by increasing virtual grid branch, realizes that low pressure detects
Intermediate relay.
Increase dummy node HEZHOUV5 and 5 virtual circuits in flow data file * .dat, before configuration 3 it is virtual
The impedance of circuit is respectively 0.00002,0.00002 and 0.00001, is triggered after first policy action and cuts small virtual of impedance
Circuit 3, and cause an other virtual circuit 1 overload to realize cutting load.Related description is as follows：
1st, the current ratio that setting impedance makes to flow through virtual circuit is 1：1：2, then cut virtual circuit 1 after virtual circuit 3,
2 current doubles, then cut later 1 electric current of virtual circuit of virtual circuit 2 and double again.
2nd, dummy node is increased, virtual load 0.1MW on node.
B HEZHOUV5525.N10.1
3rd, No. 1 virtual circuit, impedance 0.00002, bridging line balance nodes BJZ500 and dummy node are increased.
L BJZ500 525.HEZHOUV5525.1.01 .00002
4th, No. 2 virtual circuits, impedance 0.00002, bridging line balance nodes BJZ500 and dummy node are increased.
L BJZ500 525.HEZHOUV5525.2.01 .00002
5th, No. 3 virtual circuits, impedance 0.00001, bridging line balance nodes BJZ500 and dummy node are increased.
L BJZ500 525.HEZHOUV5525.3.01 .00001
6th, low-voltage variation LV gap bridge circuits are increased, low-voltage variation, which is jumped, detects fault-free jump in virtual circuit 4 and 5, PSD-FDS
3 phase of virtual circuit realizes condition judgment arranged side by side.
7th, No. 4 virtual circuits, impedance 99999., bridging line balance nodes BJZ500 and dummy node are increased.
L BJZ500 525.HEZHOUV5525.4.01 99999.
8th, No. 5 virtual circuits, impedance 99999., bridging line balance nodes BJZ500 and dummy node are increased.
L BJZ500 525.HEZHOUV5525.5.01 99999.
9th, 4 and No. 5 virtual circuits are detected for low pressure, only play intermediate relay, and excision is front and rear to virtual network
Trend is without influence.
Since balance nodes can be considered as infinitely great power supply, dummy node HEZHOUV5 connects without other again with actual electric network
Connect, therefore its dynamic process and actual electric network dynamic process can be considered as 2 mutually independent processes, i.e. virtual circuit and node
Add and actual electric network is calculated without influence.
Using STAB LV automatic safety device strategies, judge to congratulate road I, II line low pressure, and be delivered to No. 4 and No. 5 respectively
Virtual circuit, cut-offs state by judge virtual circuit, you can to realize the judgement to congratulating road I, II line low pressure.Corresponding plan
Slightly it is embodied as：
1st, low-voltage variation LV gap bridge circuits are increased, low-voltage variation jumps virtual circuit, and fault-free is detected in stability control strategy and is jumped
Three-phase realizes condition judgment arranged side by side.
2nd, judge to congratulate I line low pressure of road, cut No. 4 virtual circuits
3rd, judge to congratulate II line low pressure of road, cut No. 5 virtual circuits
In stability control strategy using STAB COND D 0 detect 4 and No. 5 virtual circuits cut-off condition adjudgement whether low pressure, make
Realize that relative strategy is realized as follows according to overload degree minute wheel time cutting load with 2 strategies：
STAB SIF A roads stone station normal mode
Realized using 2 strategies according to overload degree minute wheel time cutting load
III line of road, He Hui I, II line is congratulated to stop transport
Road I, II line low pressure are congratulated
I line of road overload is congratulated
II line of road overload is congratulated
Cut virtual network circuit 3 realize triggering time excision road stone, Huifeng, letter all, Fujian boat station load
III line of road, He Hui I, II line is congratulated to stop transport
Road I, II line low pressure are congratulated
I line of road overload is congratulated
II line of road overload is congratulated
Cut virtual network circuit 2 and 3 realize minute wheel time excision road stone, Huifeng, letter all, Fujian boat station load
By cutting off No. 2 and No. 3 virtual circuits respectively, it is possible to achieve the trend of No. 1 virtual circuit, its gear are flowed through in control
Respectively 0.025MW, 0.0333MW, 0.05MW, 0.1MW.Configured according to line impedance, individually cut off virtual circuit 3, then virtually
The trend of circuit 1 is changed into 0.05MW, individually cuts off virtual circuit 2, then the trend of virtual circuit 1 is changed into 0.0333MW, cuts at the same time
Except virtual circuit 2 and 3, then the trend of virtual circuit 1 is changed into 0.1MW.During 3 virtual circuit paired runnings, the tide of virtual circuit 1
Flow for 0.025MW.First strategy causes the trend of virtual circuit 1 to be changed into 0.05MW, and Article 2 strategy causes virtual circuit 1
Trend be changed into 0.1MW.
Using automatic safety device STAB OL strategies, judge No. 1 virtual circuit overload, utilize mistake on virtual circuit 1
Load of machinery systems difference cuts different proportion load, minute wheel time excision road stone, Huifeng, letter all, Fujian boat station load.Corresponding strategy is realized
For：
Virtual circuit is cut, adjusts data demand：Point falls STAB OUT F A, and He Prefecture stability strategy is failure to actuate, removes and move
Make
STAB OL B BJZ500 525.HEZHOUV5525.1.1 20.01.04 0.01 20.01.07 0.01
The first round excision road stone, Huifeng, letter all, 50% load of Fujian boat station, each switch motion time of standing is different
The second round excision road stone, Huifeng, letter all, 100% load of Fujian boat station, each switch motion time of standing is different
The 1 overload threshold of virtual circuit of 2 wheels action is respectively set to 0.04MW and 0.07MW, and is switched by setting
Different zones load is cut off when actuation time realizes different, the cutting load ratio of 2 rounds is respectively 50% and 100%.
Above disclosed is only the embodiment of the present invention, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, change or modification can be readily occurred in, all
It is covered by the protection scope of the present invention.
Claims (7)
- A kind of 1. long term dynamics emulation stability strategy modeling method based on virtual power grid, it is characterised in that the modeling side Method be added in the flow data file * .dat of PSD-FDS mid-long term simulations opposite actual emulation power grid be not present it is virtual Element, structure is used for the virtual power grid for surely controlling signal transmission, by the bridge joint of virtual power grid, realize automatic safety device model and Stability control strategy model interconnecting and mutually calling.
- 2. the long term dynamics emulation stability strategy modeling method based on virtual power grid, its feature exist as claimed in claim 1 In the virtual component includes virtual circuit, virtual load, virtual synchronous generator.
- 3. the long term dynamics emulation stability strategy modeling method based on virtual power grid as claimed in claim 1 or 2, its feature It is, the operating status of the stability control strategy model inspection actual electric network, implements combinational logic judgement, exports corresponding control and arrange Apply；If stability control strategy model meets actual electric network demand, directly to actual electric network output control measure；If it is unsatisfactory for reality Power constraint judges and output control condition, then to virtual power grid output control measure, changes the operating status of virtual power grid, into One step detects virtual electric network state by automatic safety device, performs the control measure that stability control strategy model cannot directly be implemented.
- 4. the long term dynamics emulation stability strategy modeling method based on virtual power grid, its feature exist as claimed in claim 3 Put into operation state, section transmission power according to section N-M failures, branch trouble, exchange branch respectively in, the stability control strategy model Implement combinational logic judgement with branch transmission power, output cuts machine, cutting load, cuts branch, locking dc bus circuit accordingly Control measure.
- 5. the long term dynamics emulation stability strategy modeling method based on virtual power grid as claimed in claim 1 or 2, its feature It is, the operating status of the automatic safety device model inspection actual electric network, exports corresponding control measure；If safety is certainly Dynamic mounted cast meets actual electric network demand, then directly to actual electric network output control measure；If it is unsatisfactory for actual electric network constraint Judge and output control condition, then to virtual power grid output control measure, change the operating status of virtual power grid, further by steady Policy model detection is controlled virtually with actual electric network state, the combinational logic that completing automatic safety device cannot be directly realized by judge, Suitable control measure are exported again.
- 6. the long term dynamics emulation stability strategy modeling method based on virtual power grid, its feature exist as claimed in claim 5 In, the automatic safety device model respectively according to overload control apparatus model, low-frequency load shedding model, low-voltage load sheding model, High-frequency cutting machine model, cross crush-cutting machine model, Out-of-Step Splitting Systems model carries out fault distinguishing, export corresponding minute wheel cut machine, cut it is negative Lotus, cut branch, islanding control measure.
- 7. the long term dynamics emulation stability strategy modeling method based on virtual power grid, its feature exist as claimed in claim 1 In the stability strategy combined crosswise of the stability control strategy model and automatic safety device model, realizes automatic safety device model Interconnecting and mutually call with stability control strategy model.
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