CN103236709A - Method for coordinating and optimizing small-interference and large-disturbance damping of alternating-current and direct-current sending-end unit - Google Patents
Method for coordinating and optimizing small-interference and large-disturbance damping of alternating-current and direct-current sending-end unit Download PDFInfo
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Abstract
The invention provides a method for coordinating and optimizing small-interference and large-disturbance damping of an alternating-current and direct-current sending-tend unit. The method includes steps of (1), constructing a stability analysis model for an alternating-current and direct-current hybrid sending-end power grid; (2), quantitatively evaluating small-interference and large-disturbance oscillation damping characteristics of the hybrid power grid; (3), determining an adjustable range of PSS (power system stabilizer) parameters; (4), analyzing a suppression effect of the PSS parameters to large-disturbance oscillation; and (5), selecting the type of a PSS coordinated with the small-interference and large-disturbance oscillation damping and optimizing the parameters coordinated with the small-interference and large-disturbance oscillation damping. The adjustable range of the PSS parameters meets requirements of small-interference oscillation damping. The method for coordinating and optimizing the small-interference and large-disturbance oscillation damping of the alternating-current and direct-current hybrid sending-end unit by the aid of the PSS has the advantages that the failure impact resistance of a direct-current sending-end system can be improved, and the safe and stable running level of the power grid is improved.
Description
Technical field
The invention belongs to field of power, be specifically related to the little interference of a kind of alternating current-direct current sending end unit and big disturbance damping coordination optimizing method.
Background technology
China's primary energy and load center are reverse distribution, and hydraulic power potentials is mainly concentrated and is distributed in the southwest; Coal resources are the Northwest such as distribution and Shanxi, Shaanxi and Xinjiang mainly; Wind energy and solar energy resources then mainly are distributed in areas such as Gansu, Qinghai, Xinjiang.For satisfy central and east load center sustainable growth with can demand, structure " resource-conserving, environmentally friendly " social requirement and realization stride big area resource and distribute rationally, the selection that is inevitable of development extra-high voltage direct-current large capacity transmission technology.
Exploitation is concentrated in energy base, and by extra-high voltage direct-current electric power is directly sent into load center, is a kind of energy development and mode of movement of economical and efficient.For improving sending end set steady serviceability, it is interconnected that energy base also exchanges major network by weak communication channel and sending end usually.According to " State Grid Corporation of China's power system safety and stability computational rules " requirement, the damping of sending end unit small interference oscillatory should be greater than 0.03, big disturbance oscillation damping should be greater than 0.015, to guarantee electrical network under disturbances in various degree such as load fluctuation and short trouble impact, quick-recovery stable operation soon.Sending end generator configuration power system stabilizer, PSS PSS is the effective means that strengthens disturbed back unit oscillation damping, can satisfy the related request of oscillation damping by rationally adjusting of parameter.
Characteristics such as power transmission capacity is big because extra-high voltage direct-current has, strong nonlinearity and alternating current-direct current coupling correlation degree height, so big disturbance fault such as short circuit impacts down, will there be larger difference in the oscillation damping of alternating current-direct current series-parallel connection sending end unit with the small interference oscillatory damping.Therefore, the PSS parameter configuration not only will satisfy the requirement of small interference oscillatory damping, also should be able to effectively suppress alternating current-direct current reciprocal effect to the adverse effect of the follow-up oscillation damping of big disturbance, ensures that big disturbance oscillation damping is greater than 0.015.
Summary of the invention
For overcoming above-mentioned defective, the invention provides the little interference of a kind of alternating current-direct current sending end unit and big disturbance damping coordination optimizing method, from the little interference of alternating current-direct current series-parallel connection sending end unit and big two angles of disturbance damping, PSS type selecting and the parameter of coordination optimization unit, promote the ability of sending end power grid operation, ensure and stride the smooth implementation that big area resource is distributed rationally.
For achieving the above object, the invention provides a kind of PSS optimization method of coordinating the little interference of alternating current-direct current series-parallel connection sending end unit and big disturbance oscillation damping, its improvements are, said method comprising the steps of:
(1). make up alternating current-direct current series-parallel connection sending end grid stability analytical model;
(2). the little interference of qualitative assessment series-parallel connection electrical network and big disturbance oscillation damping characteristic;
(3). determine to satisfy the PSS parameter adjustable extent of small interference oscillatory damping requirement;
(4) the .PSS parameter is to the inhibition analysis of big disturbance vibration;
(5) PSS type selecting and the parameter optimization of little interference and big disturbance oscillation damping coordination.
In the optimal technical scheme provided by the invention, in described step 1, collect data, make up the model that the little interference of adaptation alternating current-direct current series-parallel connection sending end electrical network and big stability for disturbance are analyzed.
In second optimal technical scheme provided by the invention, data comprise: the data that alternating current-direct current series-parallel connection sending end grid structure, alternating current-direct current passage send electrical power, load level, generator and exciter thereof and speed regulator, DC power transmission system to unify control system.
In the 3rd optimal technical scheme provided by the invention, in described step 2, set up the various typical normal operating modes of alternating current-direct current series-parallel connection sending end electrical network; Utilize little interference frequency domain character root scanning imaging system, calculate the small interference oscillatory damping of series-parallel connection electrical network sending end unit under the different running method; Utilize transient state time-domain-simulation program, calculate the transient state time-domain response under the big disturbance of series-parallel connection electrical network.
In the 4th optimal technical scheme provided by the invention, normal operating mode, comprise little load method of big load method in summer, summer, winter big load method and winter little load method, and overhaul of the equipments mode.
In the 5th optimal technical scheme provided by the invention, the big AC electric quantity fluctuation down of disturbing, the direct current dynamic characteristic will present strong nonlinearity, differing greatly between little interference damping characteristic analysis result and big disturbance oscillation damping, usually owing to the non-linear factor of direct current, the big less interference damping of disturbance damping meeting significantly reduces.
If under the different running method, the damping of alternating current-direct current series-parallel connection sending end unit small interference oscillatory is greater than 0.03, and the oscillation damping after the various big disturbance fault is all greater than 0.015, and then both all meet the demands, and need not PSS pattern and parameter are optimized; Otherwise carry out PSS pattern and Parameter Optimization, make little interference and big disturbance oscillation damping meet the demands simultaneously.
In the 6th optimal technical scheme provided by the invention, in described step 3, equal proportion is regulated gain coefficient, the phase place lead and lag parameter of PSS respectively, draw the characteristic root variation track of sending end unit small interference oscillatory, determine to satisfy damping ratio greater than the 0.03 parameter adjustable extent that requires according to variation track.
In the 7th optimal technical scheme provided by the invention, in described step 4, in PSS parameter adjustable extent, uniformly-spaced select gain coefficient, phase place lead and lag parameter combinations, verify the improvement situation of big disturbance oscillation damping characteristic; If big disturbance oscillation damping can be promoted to 0.015, then this PSS parameter is the PSS coordination optimization scheme of the little interference of alternating current-direct current series-parallel connection sending end unit and big disturbance oscillation damping.
In the 8th optimal technical scheme provided by the invention, in described step 5, if in PSS parameter adjustable extent, still big disturbance oscillation damping can't be promoted to 0.015, then need the pattern of preferred PSS; At the PSS of new selection, repeating step 2 is to step 4, optimizes gain coefficient, the phase place lead and lag parameter of PSS, make little interference damping ratio greater than 0.03 and big disturbance oscillation damping be higher than 0.015; If the damping specific energy satisfies simultaneously, Ci Shi PSS pattern and parameter then is the little interference of alternating current-direct current series-parallel connection sending end unit and the PSS coordination optimization scheme of disturbance oscillation damping greatly; If still can't satisfy the damping ratio requirement, then little interference damping ratio greater than 0.03 parameter adjustable extent in, select one group of relatively large parameter of big disturbance oscillation damping as the coordination optimization scheme, and the corresponding cutter measure of configuration in AC system, with the sending end unit vibration after the big disturbance fault of cooperation inhibition.
In the 9th optimal technical scheme provided by the invention, the pattern of preferred PSS comprises: input signal types and transfer function logical construction.
Compared with the prior art, the little interference of a kind of alternating current-direct current sending end unit provided by the invention and big disturbance damping coordination optimizing method, can be when the sending end unit has stronger little interference damping, effectively suppress big disturbance extra-high voltage direct-current non-linear dynamic characteristic to the adverse effect of oscillation damping, accelerate vibration and calm down.The method that proposes is used for promoting extra-high voltage direct-current sending end power network safety operation level and the big capacity of ultra high voltage steadily send electric energy power.
Description of drawings
Fig. 1 optimizes flow process for the PSS that coordinates the little interference of alternating current-direct current series-parallel connection sending end unit and big disturbance damping.
Fig. 2 is for being the SG type PSS of input with the generator electromagnetic power deviation.
Fig. 3 is for giving the diverging oscillation response under the big disturbance of extra-high voltage direct-current sending end again.
Fig. 4 is that SG type gain coefficient is to the influence of root locus.
Fig. 5 is that the leading parameter of SG type is to the influence of root locus.
Fig. 6 is that SG type lag parameter is to the influence of root locus.
Fig. 7 is that SG type lag parameter is to the influence of root locus.
Fig. 8 is for being combined as the S1 type PSS of input with generator electromagnetic power deviation and rotating speed deviation.
Fig. 9 is that S1 type PSS gain coefficient is to the influence of root locus.
Figure 10 is that S1 type PSS gain is to the influence of big disturbance transient response.
Embodiment
The little interference of a kind of alternating current-direct current sending end unit and big disturbance damping coordination optimizing method are used for suppressing the direct current nonlinear characteristic to the adverse effect of big disturbance oscillation damping, improve big capacity energy base extra-high voltage direct-current sending end set steady operation level.
As shown in Figure 1, the little interference of a kind of alternating current-direct current sending end unit and big disturbance damping coordination optimizing method are guaranteeing under the strongly damped condition of little interference, suppress the direct current non-linear dynamic characteristic to the adverse effect of big disturbance oscillation damping, said method comprising the steps of:
(1). make up alternating current-direct current series-parallel connection sending end grid stability analytical model;
(2). the little interference of qualitative assessment series-parallel connection electrical network and big disturbance oscillation damping characteristic;
(3). determine to satisfy the PSS parameter adjustable extent of small interference oscillatory damping requirement;
(4) the .PSS parameter is to the inhibition analysis of big disturbance vibration;
(5) PSS type selecting and the parameter optimization of little interference and big disturbance oscillation damping coordination.
In described step 1, the related data of collect alternating current-direct current series-parallel connection sending end grid structure, the alternating current-direct current passage sending electrical power, load level, generator and adjuster thereof and DC power transmission system to unify control system makes up the model that the little interference of adaptation alternating current-direct current series-parallel connection sending end electrical network and big stability for disturbance are analyzed.
In described step 2, set up the various typical normal operating modes of alternating current-direct current series-parallel connection sending end electrical network, comprise little load method of big load method in summer, summer, winter big load method and winter little load method, and overhaul of the equipments mode.Utilize little interference frequency domain character root scanning imaging system, calculate the small interference oscillatory damping of series-parallel connection electrical network sending end unit under the different running method; Utilize transient state time-domain-simulation program, calculate the transient state time-domain response under the big disturbance of series-parallel connection electrical network.
The big AC electric quantity fluctuation down of disturbing, the direct current dynamic characteristic will present strong nonlinearity, differing greatly between little interference damping characteristic analysis result and big disturbance oscillation damping, usually owing to the non-linear factor of direct current, the big less interference damping of disturbance damping meeting significantly reduces.
If under the different running method, the damping of alternating current-direct current series-parallel connection sending end unit small interference oscillatory is greater than 0.03, and the oscillation damping after the various big disturbance faults is all greater than 0.015, then both all satisfy " State Grid Corporation of China's power system safety and stability computational rules ", need not PSS pattern and parameter are optimized.Otherwise, need further carry out PSS pattern and Parameter Optimization, make little interference and big disturbance oscillation damping meet the demands simultaneously.
In described step 3, respectively equal proportion is regulated gain coefficient, the phase place lead and lag parameter of PSS, draw the sending end unit little disturb special vibration levy the root variation track, determine to satisfy damping ratio greater than the 0.03 parameter adjustable extent that requires according to variation track.
In described step 4, in PSS parameter adjustable extent, uniformly-spaced select gain coefficient, phase place lead and lag parameter combinations, verify the improvement situation of big disturbance oscillation damping characteristic.If big disturbance oscillation damping can be promoted to 0.015, then this parameter is the PSS coordination optimization scheme of the little interference of alternating current-direct current series-parallel connection sending end unit and big disturbance oscillation damping.
In described step 5, if in PSS parameter adjustable extent, still big disturbance oscillation damping can't be promoted to 0.015, then need the pattern of preferred PSS, comprise input signal types, transfer function logical construction.At the PSS of new selection, repeating step 2 is to step 4, optimizes gain coefficient, the phase place lead and lag parameter of PSS, make little interference damping ratio greater than 0.03 and big disturbance oscillation damping be higher than 0.015.If the damping specific energy satisfies simultaneously, Ci Shi PSS pattern and parameter then is the little interference of alternating current-direct current series-parallel connection sending end unit and the PSS coordination optimization scheme of disturbance oscillation damping greatly.If the damping specific energy satisfies simultaneously, Ci Shi PSS pattern and parameter then is the little interference of alternating current-direct current series-parallel connection sending end unit and the PSS coordination optimization scheme of disturbance oscillation damping greatly; If still can't satisfy the damping ratio requirement, then little interference damping ratio greater than 0.03 parameter adjustable extent in, select one group of relatively large parameter of big disturbance oscillation damping as the coordination optimization scheme, and the corresponding cutter measure of configuration in AC system, with the sending end unit vibration after the big disturbance fault of cooperation inhibition.
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
(1). make up alternating current-direct current series-parallel connection sending end grid stability analytical model
Sending system with Sichuan extra-high voltage direct-current in 2013 is example, collect Sichuan alternating current-direct current series-parallel connection electrical network net source and build sequential, load development level and generator and data such as excitation and governing system model thereof, make up trend computation model and the stability Calculation model of Sichuan and Central China major network interconnected systems.
According to wet season flow of power prediction, each mainly send electric channel or section power to arrange as follows: Sichuan-Chongqing exchanges section 4000MW, Chuan Xi and sends 2000MW, Xiang Jiaba-Shanghai extra-high voltage direct-current 6400MW, silk screen-southern Jiangsu extra-high voltage direct-current 7200MW, Changzhi-Nanyang-Jingmen AC extra high voltage passage " Nan Dianbei send " 5000MW outside.
Because time sequence difference is built in the net source, small stream Luo Du power station unit is ahead of Xi Luodu-West Zhejiang Province extra-high voltage direct-current and puts into operation, be to reduce water power nest capacitance, small stream Luo Du power station will be interconnected by the long distance radial passage of interchange in small stream Luo Du-multiple dragon-Luzhou and major network in 2013, electrical link relatively a little less than.
(2). the little interference of qualitative assessment series-parallel connection electrical network and big disturbance oscillation damping characteristic
To tame dam-Shanghai extra-high voltage direct-current series-parallel connection electrical network sending end Xi Luodu, to tame dam unit, adopt as shown in Figure 2 be the SG type PSS of input signal with the generator electromagnetic power deviation, parameter configuration is as shown in table 1.
The setting of SG type PSS parameter is crossed in table 1 Xiang Jiaba, small stream Lip river
| Parameter | T QV | K QS | T QS | T QPSS | T Q1 | T Q1，， | T Q2 | T Q2，， | T Q3 | T Q3，， | V SMAXPSS |
| The value of setting | 5 | 4.17 | 5 | 5 | 8 | 2 | 0.1 | 0.5 | 0.01 | 0.24 | 0.05 |
Adopt little interference frequency domain character root scanning imaging system, calculate sending end Xi Luodu, to the little interference damping characteristic of Relative Oscillation between tame dam unit and Sichuan major network, and the attenuation characteristic of sending end unit and major network power-angle oscillation under the big disturbed conditions, respectively as table 2 and shown in Figure 3.From result of calculation as can be seen, small interference oscillatory has very large damping ratio, but impacts under the situation of back electric parameters fluctuation in big disturbance catastrophe failure, owing to the alternating current-direct current effect of intercoupling, will be the trend of increasing oscillation between sending end unit and major network.
Table 2 alternating current-direct current series-parallel connection sending end Xi Luodu, to tame dam unit and major network oscillation mode (unit: Hz)
| Oscillation mode | Characteristic root | Frequency of oscillation | Damping ratio |
| Xi Luodu, to the vibration of tame dam and major network | -0.6591+i3.4733 | 0.5528 | 0.1864 |
According to result of calculation as can be seen, the superpower damping of little interference and big disturbance negative resistance character has determined and should sending end unit PSS be optimized from coordinating both damping characteristic angles promotes the big disturbance of sending end unit and impacts the ability of stable operation down.
(3). determine to satisfy the PSS parameter adjustable extent of small interference oscillatory damping requirement
Adopt root-locus method, gain coefficient, phase place lead and lag parameter equal proportion increase and reduce under the situation, the characteristic root variation track of alternating current-direct current series-parallel connection sending end unit and major network vibration, the root locus that wherein corresponding gain, leading parameter and lag parameter change is respectively shown in Fig. 4,5 and 6.
As can be seen from the figure, gain was less than 10 o'clock, and its numerical value increases little interference damping ratio and also increases thereupon; In the time of between 10 to 20, gain increases damping ratio and reduces to some extent; It is less that leading parameter increase damping ratio reduces, lag parameter increases the damping ratio influence.But find out that generally the parameter variation all can not cause little interference damping ratio to drop to below 0.03.Therefore, when investigating the PSS parameter adjustment to the influencing of big disturbance oscillation damping characteristic, gain coefficient, phase place lead and lag parameter all can be in wideer scope values.
(4) the .PSS parameter is to the inhibition analysis of big disturbance vibration
Examine respectively under PSS gain coefficient, the phase place lead and lag parameter change condition, big disturbance alternating current-direct current series-parallel connection sending end electrical network unit power-angle oscillation characteristic, calculating shows, gain coefficient does not have obvious influence to big disturbance damping, the leading parameter of phase place increases then can further worsen big disturbance oscillation damping, increase the phase place lag parameter and then help to promote big disturbance oscillation damping, accelerate vibration and calm down, as shown in Figure 7.Yet, change the short circuit trouble point position, further increase fault to alternating current-direct current series-parallel connection electrical network impact degree, the PSS parameter after the optimization still can't be recovered the follow-up vibrational stabilization of big disturbance.
Therefore, need further from PSS pattern and parameter two aspects, optimize it to the castering action of big disturbance oscillation damping.
(5) PSS type selecting and the parameter optimization of little interference and big disturbance oscillation damping coordination
Only with the SG type PSS of generator electromagnetic power deviation as input signal, its ability of regulation and control relatively a little less than, optimize gain coefficient and phase adjusted parameter, still be not enough to reach the purpose that suppresses big disturbance vibration.For this reason, adopt and import as PSS with generator electromagnetic power deviation and rotating speed deviation composite signal, namely adopt S1 type PSS, as shown in Figure 8, parameter arranges shown in the table 3.
The setting of S1 type PSS parameter is crossed in table 3 Xiang Jiaba, small stream Lip river
| Parameter | T RW | T 5 | T 6 | T 7 | K R | T RP | T W | T W1 | T W2 | K S | T 9 | T 10 | T 11 |
| The value of setting | 0.02 | 5 | 5 | 5 | 0.01444 | 0.02 | 5 | 5 | 5 | 1 | 0.6 | 0.12 | 0.12 |
| Parameter | K P | T 1 | T 2 | T 13 | T 14 | T3 | T4 | V SMAX | V SMIN | ? | ? | ? | ? |
| The value of setting | 15 | 2 | 8 | 0.5 | 0.1 | 0.02 | 0.02 | 0.1 | -0.1 | ? | ? | ? | ? |
Result of calculation shows that though only adopt S1 type PSS can further improve big disturbance alternating current-direct current series-parallel connection sending end electrical network oscillation damping characteristic, vibration still is tending towards constant amplitude, can't decay fast.Therefore, also need further to optimize the relevant parameter of PSS.
Unit configuration S1 type PSS is crossed in Xiang Jiaba, small stream Lip river, and gain coefficient is regulated the influence to little interference characteristic root variation track, as shown in Figure 9.As can be seen, characteristic root is moved to the left with increasing gain, and the small interference oscillatory damping further increases.Big disturbance transient response contrast under the different gains value as shown in figure 10, increases gain as seen from the figure and also can strengthen big disturbance oscillation damping simultaneously, and it is identical with the direction of gain adjustment of big disturbance oscillation damping namely to strengthen little interference.
Analysis-by-synthesis result of calculation, coordinate alternating current-direct current series-parallel connection sending end Xi Luodu, to the PSS prioritization scheme of the little interference of tame dam unit and big disturbance damping be: adopting with generator electromagnetic power deviation and rotating speed deviation composite signal is the S1 type PSS of input, and dispose parameter as shown in table 3, wherein yield value is adjusted into 18.
What need statement is that content of the present invention and embodiment are intended to prove the practical application of technical scheme provided by the present invention, should not be construed as the restriction to protection range of the present invention.Those skilled in the art can do various modifications, be equal to and replace or improve inspired by the spirit and principles of the present invention.But these changes or modification are all in the protection range that application is awaited the reply.
Claims (10)
1. the little interference of an alternating current-direct current sending end unit and big disturbance damping coordination optimizing method is characterized in that, said method comprising the steps of:
(1). make up alternating current-direct current series-parallel connection sending end grid stability analytical model;
(2). the little interference of qualitative assessment series-parallel connection electrical network and big disturbance oscillation damping characteristic;
(3). determine to satisfy the PSS parameter adjustable extent of small interference oscillatory damping requirement;
(4) the .PSS parameter is to the inhibition analysis of big disturbance vibration;
(5) PSS type selecting and the parameter optimization of little interference and big disturbance oscillation damping coordination.
2. method according to claim 1 is characterized in that, in described step 1, collects data, makes up the model that the little interference of adaptation alternating current-direct current series-parallel connection sending end electrical network and big stability for disturbance are analyzed.
3. method according to claim 2 is characterized in that, data comprise: the data that alternating current-direct current series-parallel connection sending end grid structure, alternating current-direct current passage send electrical power, load level, generator and exciter thereof and speed regulator, DC power transmission system to unify control system.
4. method according to claim 1 is characterized in that, in described step 2, sets up the various typical normal operating modes of alternating current-direct current series-parallel connection sending end electrical network; Utilize little interference frequency domain character root scanning imaging system, calculate the small interference oscillatory damping of series-parallel connection electrical network sending end unit under the different running method; Utilize transient state time-domain-simulation program, calculate the transient state time-domain response under the big disturbance of series-parallel connection electrical network.
5. method according to claim 4 is characterized in that, normal operating mode, comprise little load method of big load method in summer, summer, winter big load method and winter little load method, and overhaul of the equipments mode.
6. method according to claim 4, it is characterized in that, the big AC electric quantity fluctuation down of disturbing, the direct current dynamic characteristic will present strong nonlinearity, differing greatly between little interference damping characteristic analysis result and big disturbance oscillation damping, usually owing to the non-linear factor of direct current, the big less interference damping of disturbance damping meeting significantly reduces.
If under the different running method, the damping of alternating current-direct current series-parallel connection sending end unit small interference oscillatory is greater than 0.03, and the oscillation damping after the various big disturbance fault is all greater than 0.015, and then both all meet the demands, and need not PSS pattern and parameter are optimized; Otherwise carry out PSS pattern and Parameter Optimization, make little interference and big disturbance oscillation damping meet the demands simultaneously.
7. method according to claim 1, it is characterized in that, in described step 3, equal proportion is regulated gain coefficient, the phase place lead and lag parameter of PSS respectively, draw the characteristic root variation track of sending end unit small interference oscillatory, determine to satisfy damping ratio greater than the 0.03 parameter adjustable extent that requires according to variation track.
8. method according to claim 1 is characterized in that, in described step 4, in PSS parameter adjustable extent, uniformly-spaced selects gain coefficient, phase place lead and lag parameter combinations, verifies the improvement situation of big disturbance oscillation damping characteristic; If big disturbance oscillation damping can be promoted to 0.015, then this PSS parameter is the PSS coordination optimization scheme of the little interference of alternating current-direct current series-parallel connection sending end unit and big disturbance oscillation damping.
9. method according to claim 1 is characterized in that, in described step 5, if in PSS parameter adjustable extent, still big disturbance oscillation damping can't be promoted to 0.015, then needs the pattern of preferred PSS; At the PSS of new selection, repeating step 2 is to step 4, optimizes gain coefficient, the phase place lead and lag parameter of PSS, make little interference damping ratio greater than 0.03 and big disturbance oscillation damping be higher than 0.015; If the damping specific energy satisfies simultaneously, Ci Shi PSS pattern and parameter then is the little interference of alternating current-direct current series-parallel connection sending end unit and the PSS coordination optimization scheme of disturbance oscillation damping greatly; If still can't satisfy the damping ratio requirement, then little interference damping ratio greater than 0.03 parameter adjustable extent in, select one group of relatively large parameter of big disturbance oscillation damping as the coordination optimization scheme, and the corresponding cutter measure of configuration in AC system, with the sending end unit vibration after the big disturbance fault of cooperation inhibition.
10. method according to claim 9 is characterized in that, the pattern of preferred PSS comprises: input signal types and transfer function logical construction.
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| CN108054767B (en) * | 2017-12-08 | 2019-11-22 | 囯网河北省电力有限公司电力科学研究院 | Consider the PSS parameter setting method of multi-operating condition dynamic stability demand |
| CN110610024A (en) * | 2019-08-09 | 2019-12-24 | 国网河北省电力有限公司电力科学研究院 | PSS parameter damping effect optimization method and device |
| CN110610024B (en) * | 2019-08-09 | 2023-04-07 | 国网河北省电力有限公司电力科学研究院 | PSS parameter damping effect optimization method and device |
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