CN103532147B - A kind of voltage based on response message and angle stability real time emergency control method - Google Patents
A kind of voltage based on response message and angle stability real time emergency control method Download PDFInfo
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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
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Abstract
The invention provides a kind of voltage based on response message and angle stability real time emergency control method, comprising: step 1, the voltage of the merit angular amount of Real-time Collection generators in power systems and rotating speed amount, receiving-end system important load bus and the magnitude of current; Step 2, simultaneously the angle stability of parallel monitoring system and voltage stabilization, perform step 3 when system loses angle stability, perform step 4, perform step 1 during system stability when system loses voltage stabilization; Step 3, utilizes the retardation area S that the power characteristic computing system of matching should increase
c, determine to cut machine measure amount, perform step 1; Step 4, according to the amplitude of busbar voltage as the foundation of the order of severity judging Voltage Instability, determines bus cutting load amount according to the difference of the order of severity of Voltage Instability, performs step 1.The invention provides a kind of real time emergency control method, adopt the parallel mode judged, form complete power system voltage and angle stability Real-time Emergency Control scheme.
Description
Technical field
The present invention relates to operation and control of electric power system field, be specifically related to a kind of voltage based on response message and angle stability real time emergency control method.
Background technology
Electrical network form is increasingly sophisticated, and operational mode is changeable, and safety and stability problem becomes increasingly conspicuous, how to build safe and reliable electric power system comprehensive defence system, reducing large area blackout risk, guarantee the safe and stable operation of electric power system, is a difficult problem of pendulum in face of electric power research worker.
Ensure that the safety stabilization control system of power network safety operation is the second defence line of the power system safety and stability hierarchy of control (passive security), extensively adopt the control strategy of " off-line decision-making; real-time matching " at present, mainly for failure mode and the operational mode of anticipation, a large amount of calculated off-line is carried out to electric power system and obtains security and stability control Policy Table.This control strategy is mainly deposited not enough both ways: during (1) calculated off-line, operational mode and forecast failure can not be exhaustive, and may there is mismatch phenomenon in actual motion, adaptability is poor, and reply small probability contingency aspect lacks reliability; (2) in calculated off-line process, inevitably there are some deviations in electric network model and parameter, affects the precision of result of calculation to a certain extent, there is the unmatched risk of controlled quentity controlled variable.Therefore study and seem particularly important based on the wide area actual measurement electric power system specificity analysis of response message and security and stability control technology.
In recent years, the WAMS (WideAreaMeasurementSystem, WAMS) developed rapidly is provide new technical conditions based on the electric power system real-time stabilization analysis & control research responded.In the unstability scene that electric power system is a lot, Voltage Instability and merit angle unstability often weave in, be difficult to distinguish in the change at voltage, merit angle from Instability is Voltage Instability or merit angle unstability on earth, and real-time stabilization analysis and emergency control lack artificial off-line analysis, therefore in the power system safety and stability hierarchy of control based on response, needs can distinguish the technology of voltage stabilization and angle stability based on response message, with all-around defense Network Voltage Stability and angle stability problem.
Summary of the invention
The present invention relates to a kind of voltage based on response message and angle stability real time emergency control method, comprising:
Step 1, the voltage of the merit angular amount of Real-time Collection generators in power systems and rotating speed amount, receiving-end system important load bus and the magnitude of current;
Step 2, the simultaneously angle stability of system described in parallel monitoring and voltage stabilization, utilize the data of Real-time Collection in described step 1, judge whether described system loses angle stability according to the rotation speed difference deltan ω of described system and merit angular difference δ, judge whether system loses voltage stabilization according to the equiva lent impedance of load bus in described system and power; Described system performs step 3 when losing angle stability, performs step 4, perform step 1 during system stability when described system loses voltage stabilization;
Step 3, the retardation area S utilizing the power characteristic of matching to calculate described system should to increase
cfor the remaining acceleration area S of system
remainwith the residue retardation area S estimated
ddifference, according to the described retardation area S that should increase
cdetermine to cut machine measure amount, after taking to cut machine measure, perform step 1;
Described remaining acceleration area S
remaindeduct through the value of retardation area for accelerating area, described in the residue retardation area S that estimates
dfor the value of the residue retardation area of estimation; When described acceleration area is for occurring to failure removal from fault, superfluous torque is to relative angle speed displacement institute work; The retardation area of described system is for brake torque after failure removal is to relative angle speed displacement institute work;
Step 4, according to the amplitude of busbar voltage as the foundation of the order of severity judging Voltage Instability, determines bus cutting load amount according to the difference of the order of severity of described Voltage Instability, performs step 1 after implementing cutting load measure;
In described step 2, judge whether system loses voltage stabilization, comprising according to the equiva lent impedance of load bus in described system and power:
If find, in described system important load bus equiva lent impedance reduce and power does not increase, and voltage magnitude lower than 0.75pu time, then judge that local voltage unstability can occur described system;
Determine that corresponding described bus cutting load amount comprises according to the amplitude of the described busbar voltage of difference in described step 4:
When described busbar voltage amplitude range is 0.75pu ~ 0.70pu, described bus cutting load amount is 30%;
When described busbar voltage amplitude range is 0.70pu ~ 0.65pu, described bus cutting load amount is 40%;
When described busbar voltage amplitude range is 0.65pu ~ 0.60pu, described bus cutting load amount is 50%;
When described busbar voltage amplitude range is 0.60pu ~ 0.55pu, described bus cutting load amount is 60%;
When described busbar voltage amplitude range is 0.55pu ~ 0.50pu, described bus cutting load amount is 70%;
When described busbar voltage amplitude range is 0.50pu ~ 0.00, described bus cutting load amount is 100%.
In first preferred embodiment provided by the invention: judge that the method whether described system loses angle stability is according to the rotation speed difference deltan ω of described system and merit angular difference δ in described step 2:
If described system is multimachine system, after two-shipper equivalence is carried out to described system, turn to one machine infinity bus system;
When described system
when having increase tendency, judge that described system will lose angle stability.
In second preferred embodiment provided by the invention: the described retardation area that should increase
Wherein, ω
0represent rotating speed fiducial value,
represent group of planes speed discrepancy when picking out system unstability, δ
mrepresent the group of planes maximum work angular difference estimated, δ
urepresent group of planes merit angular difference when picking out system unstability, P
mrepresent prime mover mechanical output; P
erepresent generator electromagnetic power.
In 4th preferred embodiment provided by the invention: described system cut acc power Δ P=Δ P
m× M
s× S
base;
Wherein, M
srepresent the total inertia time constant accelerating a group of planes, S
basethe power reference value of expression system, Δ P
mrepresent and cut the mechanical output knots modification that machine needs to reach calculating:
Δ ω
uspeed discrepancy when representing that decision controls, t
delayaction time of delay when controlling to decision when representing decision-making.
The beneficial effect of a kind of voltage based on response message provided by the invention and angle stability real time emergency control method comprises:
1, a kind of voltage based on response message provided by the invention and angle stability real time emergency control method, adopt the parallel mode judged, the simultaneously voltage stabilization of supervisory control system and angle stability problem, form complete power system voltage and angle stability Real-time Emergency Control scheme, can worsen further and even cause massive blackout accident by effectively anti-locking system, enrich electricity net safety stable defense system, improve power system safety and stability operation level.
2, judge system whether Voltage Instability time, consider actual conditions, voltage threshold value be set, make judged result more reliable.
3, when the system of judging will lose angle stability, calculate remaining acceleration area based on the concept of relative kinetic energy in two machine systems, utilize homalographic criterion to calculate and cut machine amount; When judgement system will lose voltage stabilization, take concentrated cutting load measure immediately according to engineering experience.Judgement and control procedure only need utilize the dynamic response curve of system, and adapt to operational mode complicated arbitrarily and failure mode, amount of calculation is little, convenient, flexible.Consider the impact of action time of delay in control decision process, make result of calculation more reliable.
Accompanying drawing explanation
Be illustrated in figure 1 the flow chart of a kind of voltage based on response message provided by the invention and angle stability real time emergency control method;
Be illustrated in figure 2 the flow chart of the embodiment one of a kind of voltage based on response message provided by the invention and angle stability real time emergency control method;
Be illustrated in figure 3 the curve chart at the corresponding merit angle of Hamilton's one machine infinity bus system speed discrepancy in angle stability situation and unstable situation.
Be illustrated in figure 4 Power Systems voltage curve;
Be illustrated in figure 5 Power system stability Real-time Emergency Control decision-making schematic diagram;
Be illustrated in figure 6 the system configuration schematic diagram of the embodiment of real time emergency control method provided by the invention application;
Be illustrated in figure 7 each unit power-angle curve figure before implementing cutting load measure in embodiment two provided by the invention;
Be illustrated in figure 8 in embodiment two provided by the invention and implement system busbar voltage curve before cutting load measure;
Be illustrated in figure 9 in embodiment two provided by the invention and implement phase plane movement locus figure before cutting load measure;
Be before implementing cutting load measure in embodiment two provided by the invention as shown in Figure 10
change curve;
As shown in figure 11 for implementing bus 15 load impedance and apparent power figure before cutting load measure in embodiment two provided by the invention;
As shown in figure 12 for implementing bus 18 load impedance and apparent power figure before cutting load measure in embodiment two provided by the invention;
Be each unit power-angle curve figure after implementing cutting load measure in embodiment two provided by the invention as shown in figure 13;
As shown in figure 14 for implementing system busbar voltage curve after cutting load measure in embodiment two provided by the invention;
Be after implementing cutting load measure in embodiment two provided by the invention as shown in figure 15
change curve;
As shown in figure 16 for implementing bus 15 load impedance and apparent power figure after cutting load measure in embodiment two provided by the invention.
Embodiment
With reference to the accompanying drawings the specific embodiment of the present invention is described in further detail below.
The invention provides a kind of voltage based on response message and angle stability real time emergency control method, as shown in Figure 1, as shown in Figure 1, the method comprises its method flow:
Step 1, the voltage of the merit angular amount of Real-time Collection generators in power systems and rotating speed amount, receiving-end system important load bus and the magnitude of current.
Step 2, the simultaneously angle stability of parallel monitoring system and voltage stabilization, utilize the data of Real-time Collection in step 1, judge whether system loses angle stability according to the rotation speed difference deltan ω of system and merit angular difference δ, judge whether system loses voltage stabilization according to the equiva lent impedance of load bus in system and power, system performs step 3 when losing angle stability, performs step 4, perform step 1 during system stability when system loses voltage stabilization.
Step 3, utilizes the retardation area S that the power characteristic computing system of matching should increase
cfor the remaining acceleration area S of system
remainwith the residue retardation area S estimated
ddifference, according to the retardation area S that this should increase
cdetermine to cut machine measure amount, after taking to cut machine measure, perform step 1.
From fault occur to failure removal during this period of time, generator amature is subject to superfluous torque and accelerates, and this, superfluous torque equaled the increase of rotor kinetic energy in relative motion to relative angle speed displacement institute work time period, was the acceleration area of system.
After failure removal, generator amature slows down at braking procedure, and after failure removal, brake torque equals the minimizing of rotor kinetic energy in braking procedure to relative angle speed displacement institute work, is the retardation area of system.
When judging system jam, system have passed through the deceleration of a period of time, remaining acceleration area S
remainbe acceleration area to deduct through the value of retardation area, the residue retardation area S estimated
dbe the value of the residue retardation area of estimation, S
remainwith S
ddifference be the system slowdown area that increase, can determine to cut machine measure amount according to this amount, implement cut machine measure after perform step 1.
Step 4, according to the amplitude of busbar voltage as the foundation of the order of severity judging Voltage Instability, determines different bus cutting load amounts according to the difference of the order of severity of Voltage Instability, performs step 1 after implementing cutting load measure.
Embodiment one:
The invention provides the flow chart of the embodiment one of a kind of voltage based on response message and angle stability real time emergency control method as shown in Figure 2,
Judge that the method whether system loses angle stability is according to the rotation speed difference deltan ω of system and merit angular difference δ in step 2: if system is multimachine system, after two-shipper equivalence is carried out to system, turn to one machine infinity bus system; When system
when having increase tendency, judge that this system will lose angle stability.
From the energy point of view of system; can the amount of unbalance injected during what whether electric power system can keep angle stability to reflect in fact be the system failure digested; so can system maintain synchronous operation; be the uneven energy accumulated during can it receive transient state; so can system maintain synchronous operation; be the uneven energy accumulated during can it receive transient state, the movement locus of synchronous operation in (δ-Δ ω) phase plane can be kept to shift to an earlier date and embody to some extent.
Be illustrated in figure 3 the curve chart at the corresponding merit angle of Hamilton's one machine infinity bus system speed discrepancy in angle stability situation and unstable situation, as shown in Figure 3, in Hamilton's one machine infinity bus system, if system stability, in phase plane, movement locus of generator will through transverse axis, when rotation speed difference deltan ω arrives zero
be tending towards negative infinite, merit angular difference δ no longer increases, and starts backswing process; If system is unstable, then generator speed is replied less than synchronous speed, and movement locus can not arrive transverse axis, when arriving unstable equilibrium point
equalling zero, for transporting merit track minimum point after fault clearance, after this starting to move upward.After multimachine system carries out two-shipper equivalence,
have become main trend time and merit angular difference increase transform electromagnetic energy can not make speed discrepancy accelerate reduce, judge that this system will lose angle stability, in this, as the entry condition of step 3 angle stability emergency control.
Judge that the method whether system loses voltage stabilization is according to the equiva lent impedance of load bus in system and power in step 2:
If in discovery system, the equiva lent impedance of important load bus reduces, and the power of this important load does not increase, then judge that local voltage unstability can occur system.
The voltage stability of electric power system refers under given initial operating state, and after electric power system suffers disturbance, in system, all buses maintain the ability of burning voltage.Voltage stabilization mainly reflects that workload demand and system keep the/ability that balances of recovery voltage when powering to load.
Transient voltage unstability is the systemic problem that system transport capacity can not meet workload demand and causes, be illustrated in figure 4 Power Systems voltage curve figure, in Fig. 4, when system operating point is positioned at PV power voltage curve the first half, system is in voltage stabilization state, shows as load can meet self power demand by the form reducing direct impedance increase load current; When system operating point is positioned at PV power voltage curve the latter half, system is in spread of voltage state, even if load reduces direct impedance increase the power demand that load current also cannot meet self.Therefore can by Real-time Collection to response quautity carry out the voltage stabilization situation of surveillance important load bus, when load reduces self equiva lent impedance, the power of load can not be made to improve, namely judge system voltage unstability, that is:
Z
lDt> Z
lDt+1, and S
lDt> S
lDt+1.Z
lDtand Z
lDt+1represent the equiva lent impedance of t and t+1 moment load respectively, S
lDtand S
lDt+1represent the power of t and t+1 moment load respectively.
By the impact of load self-characteristic and system performance, system enters spread of voltage region and not necessarily can cause uncontrollable voltage collapse sometimes, therefore can arrange voltage threshold value, when voltage magnitude is lower than thinking during 0.75pu that system loses voltage stabilization.
The content of step 3 is the processes starting the measure of angle stability emergency control after judging merit angle unstability, is illustrated in figure 5 Power system stability Real-time Emergency Control decision-making schematic diagram, in Fig. 5, and δ
0the corresponding moment for system failure generation, δ
cthe corresponding moment for system failure excision, δ
uthe corresponding moment for picking out system unstability, δ
mthe corresponding generation moment corresponding for the group of planes maximum work angular difference estimated, A1 represents the residue retardation area estimated according to fitting power characteristic curve, because residue retardation area is not enough, need to increase retardation area, A2 represents the retardation area that should increase after enforcement controls.
Wherein,
ω
0represent rotating speed fiducial value,
represent group of planes speed discrepancy when picking out system unstability, δ
mrepresent the group of planes maximum work angular difference estimated, δ
urepresent group of planes merit angular difference when picking out system unstability, P
mrepresent prime mover mechanical output; P
erepresent generator electromagnetic power.Therefore the retardation area S that in step 3, computing system should increase
cmethod as formula (1):
Consider the time delay of control action, namely the actual act time is not the moment picking out system unstability, when implementing emergency control, remains in retardation area, and rotation speed difference deltan ω also can continue to reduce, and can utilize Δ ω
u× t
delayrepresent that control lag angle is too conservative in theory, Δ ω
uspeed discrepancy when representing that decision controls, t
delayaction time of delay when controlling to decision when representing decision-making, meet the requirement of Stable Control Strategy.Cut the mechanical output knots modification Δ P that machine needs to reach calculating
mtime, for conservative principle, because the machine of cutting in real system is not reduce merely prime mover to exert oneself, after cutting machine, the change of source impedance can reduce power characteristic, the impact of this part can be considered, only utilize rectangular area to calculate, obtain more reasonably cutting machine amount, adopt formula (2):
Obtain cutting acc power Δ P by formula (3) again:
ΔP＝ΔP
m×M
S×S
base(3)
Wherein, M
srepresent the total inertia time constant accelerating a group of planes, S
basethe power reference value of expression system.
Calculate after all cutting acc power, distribute according to situation of exerting oneself in an acceleration group of planes and cut machine amount.
The content of step 4 is when Voltage Instability may occur in the system some areas of picking out, and for avoiding voltage problem to expand deterioration further, needs to take the measure of concentrated cutting load emergency control immediately.Now the ability to transmit electricity of system to this bus load reaches capacity, must cut-out load, makes system reenter voltage stabilization region.When judging that Voltage Instability may occur in some areas, according to the amplitude of busbar voltage as the reflection of the Voltage Instability order of severity, empirical value in employing engineering, as Emergency Control Strategy, is set up and is concentrated cutting load corresponding amount, specifically as table 1 is concentrated shown in cutting load scheme table.
Cutting load scheme table concentrated by table 1
In order to more tally with the actual situation, consider the time delay in control procedure, mainly comprising 3 parts, control decision computing time, data and control command transmission time, working control device operate time.Suppose control action time 50ms, control decision calculates 10ms, transfer of data 40ms, altogether 100ms.
Embodiment two:
The specific embodiment that the embodiment two that the invention provides a kind of voltage based on response message and angle stability real time emergency control method is applied for this real time emergency control method, be illustrated in figure 6 the system configuration schematic diagram of the embodiment of real time emergency control method provided by the invention application, as shown in Figure 6, this system is New England 10 machine 39 node system, all generators all adopt classical time transient Model, consider excitation system effect.There is instantaneity three-phase ground short trouble in bus 24, fault life period 0.1s, and the circuit between bus 15 to bus 16, due to switch misoperation, excises when 0.1s, emulates the system responses curve obtained now.
The first step: gather the merit angular amount of generators in power systems and rotating speed amount, the voltage of receiving-end system heavy load bus and the magnitude of current;
Second step: synchronous supervision power system voltage stabilization and angle stability problem.When 0.1s removes fault, Fig. 7 is each unit power-angle curve figure before implementing cutting load measure in embodiment two provided by the invention, as can be seen from the domain simulation eur in Fig. 7,33,34,35 and No. 36 units accelerate a group of planes, but system does not lose angle stability.Fig. 9 and Figure 10 be respectively in embodiment two provided by the invention to implement before cutting load measure phase plane movement locus figure and
change curve, after carrying out two-shipper equivalence to system, in phase plane, movement locus and first derivative variation tendency thereof are as shown in Figures 9 and 10.But, can find out system in fact Voltage Instability from the system busbar voltage curve Fig. 8, the subject matter that namely system exists is Voltage-stabilizing Problems.As Figure 11 and Figure 12 is respectively bus 15 and bus 18 load impedance and apparent power figure, important load bus is monitored, find that bus 15 equivalent load impedance when 0.28s reduces, and its power does not increase, also start on the contrary to reduce, and now voltage magnitude is 0.573pu, illustrates that local voltage unstability situation may occur bus 15, concentrated cutting load control measure should be taked immediately.
3rd step: corresponding cutting load measure table, determine excision bus 15 with 60% load.Because control action life period postpones, actual cutting load action occurs in 0.38s.Figure 13 shows that the generator's power and angle curve of whole procedures system, Figure 13 shows that and implement each busbar voltage curve after cutting load measure, can find out that system busbar voltage obtains recovery after implementing concentrated cutting load emergency control.Figure 15 is angle stability monitoring result, can find that whole procedures system does not monitor angle stability problem.The complete result of Figure 16 process voltage Stability Monitoring for this reason, when local voltage unstability may occur discovery bus 15, after taking urgent cutting load to control, system reenters voltage stabilization region, avoids voltage collapse phenomenon.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (4)
1., based on voltage and the angle stability real time emergency control method of response message, it is characterized in that, described method comprises:
Step 1, the voltage of the merit angular amount of Real-time Collection generators in power systems and rotating speed amount, receiving-end system important load bus and the magnitude of current;
Step 2, the simultaneously angle stability of system described in parallel monitoring and voltage stabilization; Utilize the data of Real-time Collection in described step 1, judge whether described system loses angle stability according to the rotation speed difference deltan ω of described system and merit angular difference δ, judge whether system loses voltage stabilization according to the equiva lent impedance of load bus in described system and power; Described system performs step 3 when losing angle stability, performs step 4, perform step 1 during system stability when described system loses voltage stabilization;
Step 3, the retardation area S utilizing the power characteristic of matching to calculate described system should to increase
cfor the remaining acceleration area S of system
remainwith the residue retardation area S estimated
ddifference, according to the described retardation area S that should increase
cdetermine to cut machine measure amount, after taking to cut machine measure, perform step 1;
Described remaining acceleration area S
remaindeduct through the value of retardation area for accelerating area, described in the residue retardation area S that estimates
dfor the value of the residue retardation area of estimation; When described acceleration area is for occurring to failure removal from fault, superfluous torque is to relative angle speed displacement institute work; The retardation area of described system is for brake torque after failure removal is to relative angle speed displacement institute work;
Step 4, according to the amplitude of busbar voltage as the foundation of the order of severity judging Voltage Instability, determines bus cutting load amount according to the difference of the order of severity of described Voltage Instability, performs step 1 after implementing cutting load measure;
In described step 2, judge whether system loses voltage stabilization, comprising according to the equiva lent impedance of load bus in described system and power:
If find, in described system important load bus equiva lent impedance reduce and power does not increase, and voltage magnitude lower than 0.75pu time, then judge that local voltage unstability can occur described system;
Determine that corresponding described bus cutting load amount comprises according to the amplitude of the described busbar voltage of difference in described step 4:
When described busbar voltage amplitude range is 0.75pu ~ 0.70pu, described bus cutting load amount is 30%;
When described busbar voltage amplitude range is 0.70pu ~ 0.65pu, described bus cutting load amount is 40%;
When described busbar voltage amplitude range is 0.65pu ~ 0.60pu, described bus cutting load amount is 50%;
When described busbar voltage amplitude range is 0.60pu ~ 0.55pu, described bus cutting load amount is 60%;
When described busbar voltage amplitude range is 0.55pu ~ 0.50pu, described bus cutting load amount is 70%;
When described busbar voltage amplitude range is 0.50pu ~ 0.00, described bus cutting load amount is 100%.
2. the method for claim 1, is characterized in that, judges that the method whether described system loses angle stability is in described step 2 according to the rotation speed difference deltan ω of described system and merit angular difference δ:
If described system is multimachine system, after two-shipper equivalence is carried out to described system, turn to one machine infinity bus system;
When described system
when having increase tendency, judge that described system will lose angle stability.
3. the method for claim 1, is characterized in that, the described retardation area that should increase
Wherein, ω
0represent rotating speed fiducial value,
represent group of planes speed discrepancy when picking out system unstability, δ
mrepresent the group of planes maximum work angular difference estimated, δ
urepresent group of planes merit angular difference when picking out system unstability, P
mrepresent prime mover mechanical output; P
erepresent generator electromagnetic power.
4. method as claimed in claim 3, is characterized in that,
Described system cut acc power Δ P=Δ P
m× M
s× S
base;
Wherein, M
srepresent the total inertia time constant accelerating a group of planes, S
basethe power reference value of expression system, Δ P
mrepresent and cut the mechanical output knots modification that machine needs to reach calculating:
Δ ω
uspeed discrepancy when representing that decision controls, t
delayaction time of delay when controlling to decision when representing decision-making.
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| CN103855727B (en) * | 2014-03-18 | 2016-01-20 | 西安交通大学 | The system of selection in POWER SYSTEM EMERGENCY CONTROL place |
| CN104022512B (en) * | 2014-05-16 | 2016-01-20 | 西安交通大学 | Based on the POWER SYSTEM EMERGENCY CONTROL method of response message |
| US9979192B2 (en) * | 2014-07-29 | 2018-05-22 | General Electric Company | System and method for controlling a power distribution network |
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| CN108599230B (en) * | 2018-01-09 | 2021-03-16 | 天津大学 | Method for improving transient stability of system by combining crowbar circuit and energy storage device |
| CN108462169B (en) * | 2018-03-19 | 2021-03-02 | 昆明理工大学 | Generator tripping load calculation method for improving transient stability of power system |
| CN108667009A (en) * | 2018-04-28 | 2018-10-16 | 中国电力科学研究院有限公司 | A kind of high-speed secure stable control method and system |
| CN109494718B (en) * | 2018-11-16 | 2022-05-13 | 陕西理工大学 | Damping-considered emergency control method for complex power system |
| CN110514953B (en) * | 2019-03-25 | 2021-11-05 | 中国电力科学研究院有限公司 | Power angle and voltage aliasing-based power grid fault simulation identification method and system |
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