CN106849075A - TCSC emergency control methods for improving power system transient stability - Google Patents

TCSC emergency control methods for improving power system transient stability Download PDF

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Publication number
CN106849075A
CN106849075A CN201710212263.2A CN201710212263A CN106849075A CN 106849075 A CN106849075 A CN 106849075A CN 201710212263 A CN201710212263 A CN 201710212263A CN 106849075 A CN106849075 A CN 106849075A
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tcsc
check
ins
emergency control
group
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CN106849075B (en
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薛峰
周野
眭仁杰
吴峰
宋晓芳
罗凯明
金涛
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State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Nari Technology Co Ltd
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State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Nari Technology Co Ltd
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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
    • 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
    • H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
    • 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]
    • 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
    • H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
    • 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
    • H02J3/002—Flicker reduction, e.g. compensation of flicker introduced by non-linear load
    • 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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/10—Flexible AC transmission systems [FACTS]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention discloses a kind of TCSC emergency control methods for improving power system transient stability, it is first determined whether starting TCSC emergent controls, order is mended by force if starting and pacify after fault clearance to control to be sent to TCSC, otherwise terminate this method；Calculate equivalent machine rotor angle, angular speed, inertia time constant, electromagnetic power and mechanical output；Calculate the current acceleration energy and deceleration energy for waiting check-in to accumulate；Determine TCSC emergency control policies according to the acceleration energy and deceleration energy of check-in currently accumulation is waited；Judge whether to exit TCSC emergency control policies, the original control strategies of TCSC are recovered if exiting；Otherwise return and TCSC emergent controls are proceeded to next cycle of oscillation；The present invention is used to improve the TCSC emergency control methods of power system transient stability, can not only effectively improve the stability margin of first pendulum in transient process, and the damping control of persistent oscillation after can also realizing quickly calms down generator rotor angle and oscillation of power.

Description

TCSC emergency control methods for improving power system transient stability
Technical field
The invention belongs to power system automation technology field, it is specifically related to a kind of steady for improving electrical power system transient Qualitatively TCSC emergency control methods.
Background technology
In recent years, as the access of extensive new energy, extra-high voltage alternating current-direct current power transmission engineering put into operation and Power Electronic Technique Fast development, China's power network gradually formed worldwide largest, transmission voltage grade highest, complexity highest electricity Net, because the non-linear and Non-Self-Governing of power system is continuously increased, traditional safety and stability measure can not fully meet Modern power network develops and safety, therefore safer, the reasonable and intelligent operation control device of power network needs.Controlled series compensation device (TCSC, Thyristor Controlled Series Compensation) this power electronic equipment is defeated as flexible AC Important a member in power technology, a brand-new stage is extended to by fixed series compensation, and it can continuously, quickly and on a large scale change Become line impedance such that it is able to which flexibly and economically regulation trend, increase circuit conveying capacity, damping system vibrate, and effectively carry Stability of power system high, application prospect is very wide.
The existing many researchs on improving stability of power system using controlled series compensation device both at home and abroad, it is most of be with Avoid unit unstability from only carrying out strong benefit to head pendulum for target to control, control strategy is in the majority with traditional PID control, in TCSC Suppression system vibration aspect, mostly suppresses the research of subsynchronous resonance and low-frequency oscillation.
EEAC application extension homalographic criterion methods are an effectively methods in power system transient stability analysis, EEAC law of equal areas has certain advantage in terms of the transient stability of quantitative evaluation power network, has been widely used in big electricity The quantitative analysis of net transient stability and control, and the follow-up generator rotor angle of conventional few article combination law of equal areas research TCSC suppression, The specific Optimal Control Strategy of oscillation of power.
The content of the invention
Goal of the invention：In order to improve transient stability of the power system under disturbance and overcome conventional security stabilization emergent control Measure accuracy and ageing poor shortcoming, the present invention provide a kind of tight for improving the TCSC of power system transient stability Anxious control method, realizes flexibly and economically increasing circuit conveying capacity, damping system vibration, effectively improves Operation of Electric Systems Stability.
Technical scheme：To achieve the above object, a kind of TCSC for improving power system transient stability of the invention Emergency control method, the method is comprised the following steps：
Broken down during S1 Operation of Electric Systems, judge whether to start TCSC emergent controls, it is clear in failure if starting Pacify control after removing and send strong benefit order to TCSC, and enter step S2, otherwise terminate this method；
S2 is based on real-time measuring data, and it is normal to calculate equivalent machine rotor angle, angular speed, inertia time according to EEAC methods Number, electromagnetic power and mechanical output, into step S3；
S3 calculates the current acceleration energy and deceleration energy for waiting check-in to accumulate, into step S4；
S4 determines TCSC emergency control policies, into step according to the acceleration energy and deceleration energy that wait check-in currently accumulation Rapid S5；
S5 judges whether to exit TCSC emergency control policies, if exiting, recovers the original control strategies of TCSC, terminates we Method；Otherwise return to step S2, TCSC emergent controls are proceeded to next cycle of oscillation.
Further, the step S1 is comprised the following steps：
S11 determines forecast failure set, is calculated according to off-line simulation, determines what is existed under power system different running method Failure, determines forecast failure set；
Broken down during S12 Operation of Electric Systems, according to the method for operation and failure of power system when breaking down Whether type, it is determined that break down belonging to forecast failure set, starts TCSC emergent controls if belonging to；If be not belonging to, Then terminate this method.
Further, the step S2 is comprised the following steps：
Each unit in multi-computer system is dynamically divided into neck pre-group S and remaining group A, neck pre-group S system by S21 according to EEAC methods The equivalent machine rotor equation of motion of system represents that the remaining group A system equivalent machine rotor equations of motion are represented with formula (2) with formula (1)：
Wherein, δSIt is the rotor angle of the check-ins such as neck pre-group S system, ωSIt is the rotor velocity of the check-ins such as neck pre-group S system, MSIt is the inertia time constant of the check-ins such as neck pre-group S system, PmSIt is the mechanical output of the check-ins such as neck pre-group S system, PeSBefore neck The electromagnetic power of the check-ins such as group's S system, δAIt is the rotor angle of remaining group A system equivalent machines, ωAIt is remaining group A system equivalent machines Rotor velocity, MAIt is the inertia time constant of remaining group A system equivalent machines, PmAIt is the mechanical work of remaining group A system equivalent machines Rate, PeAIt is the electromagnetic power of remaining group A system equivalent machines, t is the time of integration, and each parameter is by measuring direct access；
S22 further makees unit equivalence, defines the one machine infinity bus system equivalence machine rotor equation of motion：
Order：δ=δS-δA；ω=ωS-ωA；Respectively Parameter passes through simple computation direct access；
Wherein, δ is the rotor angle of the check-ins such as one machine infinity bus system, and ω is the rotor angle of the check-ins such as one machine infinity bus system Speed, M is the inertia time constant of the check-ins such as one machine infinity bus system, PmIt is the mechanical work of the check-ins such as one machine infinity bus system Rate, PeIt is the electromagnetic power of the check-ins such as one machine infinity bus system.
Further, the current acceleration energy and deceleration energy for waiting check-in to accumulate, computing formula are calculated in the step S3 It is defined as follows：
It is defined on Pm>PeThe check-ins such as period are acceleration mode, wait check-in accumulation acceleration energy E+Computing formula is：
Wherein, δi1And δi2I-th P is represented respectivelym>PeThe initial time of period and finish time, n represents Pm>PePeriod Accumulation number；
It is defined on Pm<PePeriod equivalence seat in the plane deceleration regime, waits check-in accumulation deceleration ENERGY E_Computing formula is：
Wherein, δi1And δi2I-th P is represented respectivelym<PeThe initial time of period and finish time, n represents Pm<PePeriod Accumulation number.
Further, in the step S4, TCSC emergency control policies are determined by formula (6)：
Beneficial effect：The present invention compared with the prior art, this have the advantage that：
1st, the present invention is based on EEAC, proposes a kind of new safety and stability with reference to conservation of energy principle during single pendulum urgent Control method, quickly calms down generator rotor angle and oscillation of power；
2nd, the present invention improves transient stability of the power system under disturbance, overcomes conventional security stabilization emergent control and arranges Accuracy and ageing poor shortcoming are applied, realizes flexibly and economically increasing line transmission ability, damping system vibration, effectively Improve the stability of Operation of Electric Systems.
3rd, for improving the TCSC emergency control methods of power system transient stability, transient state mistake can not only be effectively improved The stability margin of first pendulum in journey, the damping control of persistent oscillation after can also realizing quickly calms down generator rotor angle and oscillation of power.
Brief description of the drawings
Fig. 1 is the inventive method steps flow chart schematic diagram.
When Fig. 2 is that the disturbed rear equivalence prow of system puts unstability power-angle curve and TCSC installed to power transmission line and implements compensation Power-angle curve schematic diagram.
TCSC lockings or strong added time power-angle curve schematic diagram during the check-in anti-wobble such as Fig. 3 is.
TCSC lockings or strong added time power-angle curve schematic diagram during the check-in such as Fig. 4 is just pendulum.
Fig. 5 is " two-shipper is equivalent " point group's schematic diagram in embodiment of the present invention unified power system.
Fig. 6 is to implement TCSC strings benefit amount schematic diagram during different control strategies in the embodiment of the present invention one.
Fig. 7 (a), (b), (c), (d) four figure be respectively TCSC perform the whole strong benefit of original PSD-BPA control strategies, TCSC, The only first pendulum of TCSC is strong mend and TCSC perform control method of the present invention these four it is tactful when string benefit amount versus time curve figure.
Fig. 8 is to wait check-in power-angle curve figure when implementing different control strategies.
Specific embodiment
The present invention is further described below in conjunction with the accompanying drawings.
Reference picture 1, the present invention proposes a kind of TCSC emergency control methods for improving power system transient stability, Step S1 in Fig. 1：Judge whether to start TCSC emergent controls：Determine first, calculated according to off-line simulation, determine power system not With the uneasy total failure existed under the method for operation, forecast failure set is determined；Broken down during Operation of Electric Systems, according to The method of operation and fault type of power system when breaking down, it is determined that break down whether belong to forecast failure set, if Belong to then startup TCSC emergent controls, control is pacified after fault clearance and sends strong benefit order to forecast failure set TCSC, and entered Step S2；If be not belonging to, terminate the inventive method；
Step S2 in Fig. 1：Based on real-time measuring data, equivalent machine rotor angle, angular speed are calculated according to EEAC methods, is used to Property time constant, electromagnetic power and mechanical output；For complicated multi-computer system, different generators pass through unstable equilibrium point Moment is different, and respective rocking curve also not exclusively coincide, it is difficult to be directly controlled tactful amount using traditional law of equal areas Change and solve.Therefore, based on EEAC by multi-computer system it is equivalent be one machine infinity bus system, equivalent technology is ripe prior art；
Equivalent machine rotor equation of motion is obtained by following steps：
According to EEAC methods, each unit in multi-computer system is dynamically divided into neck pre-group S and remaining group A, neck pre-group S system etc. Check-in equation of rotor motion represents that the remaining group A system equivalent machine rotor equations of motion are represented with formula (2) with formula (1)：
Wherein, δSIt is the rotor angle of the check-ins such as neck pre-group S system, ωSIt is the rotor velocity of the check-ins such as neck pre-group S system, MsIt is the inertia time constant of the check-ins such as neck pre-group S system, PmSIt is the mechanical output of the check-ins such as neck pre-group S system, PesBefore neck The electromagnetic power of the check-ins such as group's S system, δAIt is the rotor angle of remaining group A system equivalent machines, ωAIt is remaining group A system equivalent machines Rotor velocity, MAIt is the inertia time constant of remaining group A system equivalent machines, PmAIt is the mechanical work of remaining group A system equivalent machines Rate, PeAIt is the electromagnetic power of remaining group A system equivalent machines, t is the time of integration, and each parameter is by measuring direct access；
Further make unit equivalent, define the one machine infinity bus system equivalence machine rotor equation of motion：
Order：δ=δS-δA；ω=ωs-ωA；Respectively Parameter passes through simple computation direct access；
Wherein, δ is the rotor angle of the check-ins such as one machine infinity bus system, and ω is the rotor angle of the check-ins such as one machine infinity bus system Speed, M is the inertia time constant of the check-ins such as one machine infinity bus system, PmIt is the mechanical work of the check-ins such as one machine infinity bus system Rate, PeIt is the electromagnetic power of the check-ins such as one machine infinity bus system；
So as to obtain waiting check-in equation of motion formula (3), step S3 in Fig. 1 is subsequently entered；
Step S3 in Fig. 1：The check-in initial times such as each parameter of check-in, calculating to finish time are waited according to what step S2 was obtained During accumulate acceleration energy and deceleration energy, the acceleration energy and deceleration energy of accumulation collectively constitute energy summation；
The current acceleration energy and deceleration energy for waiting check-in to accumulate is calculated in step S3, computing formula is defined as follows：
It is defined on Pm>PeThe check-ins such as period are acceleration mode, wait check-in accumulation acceleration energy E+Computing formula is：
Wherein, δi1And δi2I-th P is represented respectivelym>PeThe initial time of period and finish time, n represents Pm>PePeriod Accumulation number；
It is defined on Pm<PePeriod equivalence seat in the plane deceleration regime, waits check-in accumulation deceleration ENERGY E_Computing formula is：
Wherein, δi1And δi2I-th P is represented respectivelym<PeThe initial time of period and finish time, n represents Pm<PePeriod Accumulation number；The acceleration energy and deceleration energy of accumulation are calculated by formula (4) and formula (5)；
In stable state, perseverance has in addition：E+=E_=0；
The step S4 into Fig. 1；
Step S4 in Fig. 1：According to the acceleration energy and deceleration energy that wait check-in currently accumulation that system-computed is obtained, it is determined that TCSC emergency control policies, peace control to controlled series compensation module issuing it is strong mend and blocking order, wherein controlled series compensation module mend by force or The selection gist of blocking is as follows：
It is theoretical from EEAC, first pendulum unstability after system is disturbed, during its power-angle curve is as shown in Figure 2 shown in dotted line, then There is first pendulum any time perseverance after failure：E+>E_；If installing TCSC to power transmission line and implementing compensation, transmitted power is increased, it is equivalent Electromechanical magnetic power PeIncrease, now power-angle curve such as Fig. 2 is shown in solid, and now acceleration energy is reduced, and acceleration energy increases favourable Stablize in system, therefore just TCSC should be immediately issued after failure generation and mend order by force.
If first pendulum stabilization, when reaching E+=E_During the moment, power-angle curve backswing, the backswing is referred to as anti-wobble process, such as Fig. 3 institutes Show have during anti-wobble：E+<E_；If during anti-wobble TCSC continue it is strong mend, equivalent electromechanics magnetic power as shown by dotted lines in figure 3, if this phase Between TCSC lockings, then equivalent acc power curve such as shown in Fig. 3 realizes, then anti-wobble acceleration energy increases, the reduction of deceleration energy, favorably In the stability of system, therefore TCSC blocking orders should be issued during this period；
When reaching E again+=E_During=0 moment, power-angle curve again backswing to as shown in figure 4, be referred to as positive pendulum process, point Analysis process is similar with first pendulum with conclusion, need to issue TCSC and mend order by force；
In sum, TCSC only needs to switch between strong benefit or two kinds of extremities of locking after failure, it is possible to realize first Pendulum transient stability margin improves the damping control with rear persistent oscillation, and specific control strategy is as follows：
Step S5 in Fig. 1：Judge whether to exit TCSC emergency control policies, if exiting, recover the original control plans of TCSC Slightly, this method is terminated；Otherwise return to step S2, TCSC emergent controls are proceeded to next cycle of oscillation.
Positive pendulum and anti-wobble in oscillatory process is considered as a cycle by the inventive method, is included in this time period in theory Complete oscillating characteristic, therefore the optimal control policy of controlled series compensation in signal period need to be only calculated every time, then by under peace control Hair regulating command, afterwards each cycle repeat this control strategy, you can suppress to be optimal effect in oscillatory process whole, Persistent oscillation quick flat ceases after making system, reaches the purpose for improving power system transient stability.As for the condition for terminating this control strategy Depending on can be by real system complexity and disturbance size, general fixed control pendulum number or the time of setting one.
Embodiment one：
Power system as shown in Figure 5, G1~G8 is synchronous generator, and G1~G6 every active 280MW, G9~G11 are Wind-driven generator is 280MW per Fans active power output；Bus 5 and bus 6 are directly connected to by direct current transportation；TCSC modules are pacified On bus 1 to the second loop line road between bus 2, this section of per unit reactance of circuit is 0.0475, is set according to engineering experience It is this section the 20% of line reactance value to put fixed series compensation, and maximum string is filled and is limited to 60%；0s moment bus 1 is between bus 2 There is three phase short circuit fault in one loop line road, 0.1s disconnects line fault elimination near the place of bus 2；
For above-mentioned failure, reference picture 6, the step of by preceding method S2 can by generating set be divided into Critical Group G1~G6 and Remaining group G7, G8, further carry out unit equivalence and are easily calculated the one machine infinity bus system equivalence machine rotor equation of motion；
The step of by preceding method, S3 can be calculated the transient energy function that different strings are mended under strategy；
Reference picture 7, S4 determines the specific of controlled series compensation according to the energy function for waiting check-in to accumulate the step of by preceding method Control strategy, separately sets three control groups as reference, and (a), (b), (c), (d) four figures are respectively TCSC and perform original in Fig. 7 The only first strong benefits of pendulum of PSD-BPA control strategies, TCSC whole benefit, TCSC by force and TCSC perform this paper control methods, and these four are tactful When go here and there benefit amount versus time curve.
Reference picture 8, S5 the step of by preceding method is the reliability for ensureing equipment, and the condition for exiting control is set as temporarily In preceding four cycles during state in 5 seconds, this emergent control measure is just exited afterwards, it is former control strategy to switch back into.By in Fig. 5 Tactful 4 curves are visible, and compared other several control strategies, and power-angle oscillation is substantially comparatively fast suppressed；It can be seen that, the present invention is calculated The emergency control policy for obtaining is basically identical with theory analysis effect, illustrates effectiveness of the invention and superiority.
The above is only the preferred embodiment of the present invention, it should be pointed out that：Come for those skilled in the art Say, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be regarded as Protection scope of the present invention.

Claims (5)

1. it is used to improve the TCSC emergency control methods of power system transient stability, it is characterised in that comprise the following steps：
Broken down during S1 Operation of Electric Systems, judge whether to start TCSC emergent controls, if starting, after fault clearance Peace control sends strong benefit and orders to TCSC, and enters step S2, otherwise terminates this method；
S2 is based on real-time measuring data, and equivalent machine rotor angle, angular speed, inertia time constant, electricity are calculated according to EEAC methods Magnetic power and mechanical output, into step S3；
S3 calculates the current acceleration energy and deceleration energy for waiting check-in to accumulate, into step S4；
S4 determines TCSC emergency control policies, into step S5 according to the acceleration energy and deceleration energy that wait check-in currently accumulation；
S5 judges whether to exit TCSC emergency control policies, if exiting, recovers the original control strategies of TCSC, terminates this method； Otherwise return to step S2, TCSC emergent controls are proceeded to next cycle of oscillation.
2. the TCSC emergency control methods for improving power system transient stability according to claim 1, its feature It is：
The step S1 is comprised the following steps：
S11 determines forecast failure set, is calculated according to off-line simulation, determines the event existed under power system different running method Barrier, determines forecast failure set；
Broken down during S12 Operation of Electric Systems, according to the method for operation and fault type of power system when breaking down, It is determined that break down whether belonging to forecast failure set, TCSC emergent controls are started if belonging to；If be not belonging to, terminate This method.
3. the TCSC emergency control methods for improving power system transient stability according to claim 1, its feature It is：
The step S2 is comprised the following steps：
Each unit in multi-computer system is dynamically divided into neck pre-group S and remaining group A, neck pre-group S system etc. by S21 according to EEAC methods Check-in equation of rotor motion represents that the remaining group A system equivalent machine rotor equations of motion are represented with formula (2) with formula (1)：
Wherein, δSIt is the rotor angle of the check-ins such as neck pre-group S system, ωSIt is the rotor velocity of the check-ins such as neck pre-group S system, MSFor The inertia time constant of the check-ins such as neck pre-group S system, PmSIt is the mechanical output of the check-ins such as neck pre-group S system, PeSIt is neck pre-group S The electromagnetic power of system equivalent machine, δAIt is the rotor angle of remaining group A system equivalent machines, ωAIt is turning for remaining group A system equivalent machines Sub- angular speed, MAIt is the inertia time constant of remaining group A system equivalent machines, PmAIt is the mechanical output of remaining group A system equivalent machines, PeAIt is the electromagnetic power of remaining group A system equivalent machines, t is the time of integration, and each parameter is by measuring direct access；
S22 makes δ=δS-δA；ω=ωS-ωS； Further make unit equivalent, define the one machine infinity bus system equivalence machine rotor equation of motion：
Wherein, δ is the rotor angle of the check-ins such as one machine infinity bus system, and ω is the rotor angle speed of the check-ins such as one machine infinity bus system Degree, M is the inertia time constant of the check-ins such as one machine infinity bus system, PmIt is the mechanical output of the check-ins such as one machine infinity bus system, Pe It is the electromagnetic power of the check-ins such as one machine infinity bus system.
4. the TCSC emergency control methods for improving power system transient stability according to claim 3, its feature It is：
The current acceleration energy and deceleration energy for waiting check-in to accumulate is calculated in the step S3, computing formula is defined as follows：
It is defined on Pm>PeThe check-ins such as period are acceleration mode, wait check-in accumulation acceleration energy E+Computing formula is：
Wherein, δi1And δi2I-th P is represented respectivelym>PeThe initial time of period and finish time, n represents Pm>PeThe accumulation of period Number；
It is defined on Pm<PePeriod equivalence seat in the plane deceleration regime, waits check-in accumulation deceleration ENERGY E-Computing formula is：
Wherein, δi1And δi2I-th P is represented respectivelym<PeThe initial time of period and finish time, n represents Pm<PeThe accumulation of period Number.
5. the TCSC emergency control methods for improving power system transient stability according to claim 4, its feature It is：
In the step S4, TCSC emergency control policies are determined by formula (6)：
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108110782A (en) * 2017-12-21 2018-06-01 国电南瑞科技股份有限公司 A kind of flexible direct current power transmission system control strategy optimization method for improving Transient angle stability
CN108599230A (en) * 2018-01-09 2018-09-28 天津大学 A method of joint crowbar circuit improves power system transient stability with energy storage device
CN109274098A (en) * 2018-11-16 2019-01-25 陕西理工大学 Consider the simple power system emergency control method of damping
CN109494718A (en) * 2018-11-16 2019-03-19 陕西理工大学 Damping-considered emergency control method for complex power system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102403721A (en) * 2011-11-23 2012-04-04 昆明理工大学 Method for adjusting super real-time coincidence time sequence based on transient power angle stability margin
CN102624013A (en) * 2012-04-06 2012-08-01 湖北省电力公司 Phase compensation principle-based design method for energy storage damping controller
CN103606952A (en) * 2013-11-19 2014-02-26 国家电网公司 Cutter control measure quantification method based on system acceleration energy
CN104809512A (en) * 2014-12-18 2015-07-29 国电南瑞科技股份有限公司 Rapid assessment method for performance indexes of different emergency control measures in electric power system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102403721A (en) * 2011-11-23 2012-04-04 昆明理工大学 Method for adjusting super real-time coincidence time sequence based on transient power angle stability margin
CN102624013A (en) * 2012-04-06 2012-08-01 湖北省电力公司 Phase compensation principle-based design method for energy storage damping controller
CN103606952A (en) * 2013-11-19 2014-02-26 国家电网公司 Cutter control measure quantification method based on system acceleration energy
CN104809512A (en) * 2014-12-18 2015-07-29 国电南瑞科技股份有限公司 Rapid assessment method for performance indexes of different emergency control measures in electric power system

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CN108110782A (en) * 2017-12-21 2018-06-01 国电南瑞科技股份有限公司 A kind of flexible direct current power transmission system control strategy optimization method for improving Transient angle stability
CN108110782B (en) * 2017-12-21 2020-11-17 国电南瑞科技股份有限公司 Flexible direct current transmission system control strategy optimization method for improving transient power angle stability
CN108599230A (en) * 2018-01-09 2018-09-28 天津大学 A method of joint crowbar circuit improves power system transient stability with energy storage device
CN109274098A (en) * 2018-11-16 2019-01-25 陕西理工大学 Consider the simple power system emergency control method of damping
CN109494718A (en) * 2018-11-16 2019-03-19 陕西理工大学 Damping-considered emergency control method for complex power system
CN109274098B (en) * 2018-11-16 2023-04-07 陕西理工大学 Simple power system emergency control method considering damping

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