CN104319795A - Nuclear power unit excitation and PSS parameter optimization setting method enhancing system damping - Google Patents
Nuclear power unit excitation and PSS parameter optimization setting method enhancing system damping Download PDFInfo
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- CN104319795A CN104319795A CN201410677144.0A CN201410677144A CN104319795A CN 104319795 A CN104319795 A CN 104319795A CN 201410677144 A CN201410677144 A CN 201410677144A CN 104319795 A CN104319795 A CN 104319795A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention relates to a nuclear power unit excitation and PSS parameter optimization setting method enhancing system damping. The method integrates digital-analog hybrid simulation and an on-site test method. Firstly, by means of digital-analog hybrid simulation, frequency domain eigenvalue analysis and time domain disturbance simulation are carried out on a simulation grid, dynamic invariant features and important oscillation information between interconnected network areas are extracted, weight sequencing is carried out on the unit by means of a participation matrix and PF module value, and unit excitation and PSS parameter optimization research is carried out on the nuclear power unit with the largest participation factor; by means of sensitivity analysis, main optimization parameters of an engine excitation system are determined, an optimization interval suitable for AVR and PSS parameters is determined by carrying out simulation research in multiple operation modes, and finally, by means of on-site test research, stability and effectiveness are determined when unit optimization parameters are operated in a power plant are determined. The method can be more suitable for actual grid operation features and can be more suitable for on-site actual units, and guarantees stable operation of a system.
Description
Technical field
The invention belongs to electrical engineering scientific domain, be specifically related to a kind of the nuclear power generating sets excitation and the PSS parameter optimization setting method that strengthen system damping.
Background technology
Power supply and the auxiliary device thereof of supply synchronous generator exciting electric current are referred to as excitation system, are generally made up of field regulator and PSS two parts.Field regulator controls the output of exciting power unit according to input signal and given adjustment criteria, provides exciting current to synchronous generator rotor.Field regulator itself is that a hysteresis unit produces negative damping, and its electromagnetic torque △ Me is projected as negative on △ ω axle.The control mode of PSS is exactly in automatic excitation regulator AVR, divided by voltage deviation △ Ue as outside feedback quantity, draw the auxiliary input of one or several additional signal (being generally two) in rotating speed deviation △ ω, frequency departure △ f, accelerating power deviation △ P, electrical power deviation △ Pe as excitation con-trol again, through certain phasing, produce on the occasion of damping torque, calm down the low-frequency oscillation of motor or electric power system, improve the dynamic stability of system.China achieves significant achievement and great progress in excitation system technical research and application aspect.From late 1970s, China has carried out experimental study that is theoretical and laboratory to excitation and PSS, has carried out dynamic simulation test with the PSS device of independent development.Nineteen eighty-two, the automatic excitation regulator of the band power system stabilizer, PSS of China's designed, designed and manufacture drops into industry park plan in Feng Tan hydroelectric plant, Hunan.The Novel excitation system of independent research in 2004 successfully puts into operation on the 700MW generating set of Three Gorges Hydropower Plant, for ensureing that the dynamic stability of national interconnected network provides technical support and guarantee.
Choose suitable excitation and PSS parameter raising generating set self and power system stability operation level are had great significance.Domesticly at present to have carried out for the conventional electric power generation such as thermoelectricity, water power unit excitation and PSS parameter optimizing research and field test work, but there is not been reported about the excitation of nuclear power generating sets and PSS parameter optimizing research and field test work.Because the excitation system loop design of nuclear power generating sets is different from conventional rack, the optimization method of conventional thermoelectricity, Hydropower Unit can not be adopted to carry out the parameter optimization of nuclear power generating sets.
The domestic relevant report having not yet to see excitation about nuclear power generating sets and PSS parameter optimizing research and field test work, existing nuclear power generating sets parameters of excitation system many employings producer carries parameter, the uncompensated phase frequency hysteresis characteristic of excitation system is measured on this basis by test, adopt advanced-delay component to compensate by PSS, be often difficult to adapt to actual electric network Various Complex mode to unit operation requirement.
Summary of the invention
A kind of nuclear power generating sets excitation of the enhancing system damping solved the problem and PSS parameter is the object of the present invention is to provide to optimize setting method.
For achieving the above object, technical scheme of the present invention is: a kind of nuclear power generating sets excitation and PSS parameter optimization setting method strengthening system damping, comprises the steps,
Step S1: the modal graph analyzing simulated grid oscillation mode, chooses the nuclear power generating sets of parameter to be optimized;
Step S2: the excitation system model analysis of nuclear power generating sets, determines parameter to be optimized;
Step S3: the emulation of excitation system response performance and on-the-spot actual set verification experimental verification.
In embodiments of the present invention, described step S1 is concrete namely: emulated by numerical model analysis, carries out the analysis of frequency domain character value and time domain disturbance emulation, extract the interregional dynamic stability feature of interconnected network and oscillation information to simulated grid.
In embodiments of the present invention, in described step S2, the excitation system of described nuclear power generating sets adopts two machine brushless excitation systems.
In embodiments of the present invention, described step S2 is concrete namely: for the T3/T4 ratio in excitation multiplication factor, exciter saturation coefficient, Kc, Kd numerical value and pid parameter, in analysis excitation system, each parameter is on the sensitivity of the impact of system damping level, and the adjustment of analysis PSS parameter is to the compensation of excitation system hysteresis characteristic, to the influence degree of the damping level of system.
In embodiments of the present invention, described step S3 is concrete namely: after adopting Optimal Parameters, carries out 5% unloaded step simulation calculation, the step response of detection system according to rower to the excitation system after employing Optimal Parameters.
Compared to prior art, the present invention has following beneficial effect:
(1) this programme goes for the excitation of nuclear power generating sets and PSS parameter optimization is adjusted; Be different from the Parameter Optimization of Excitation System Zheng Bangliang of existing traditional thermoelectricity, Hydropower Unit, this motion method has done ad hoc analysis for nuclear power generating sets energized circuit particularity; Meanwhile, the method that the method also directly adopts parameter of dispatching from the factory to carry out default setting parameters of excitation system than existing nuclear power generating sets more can adapt to actual electric network operation characteristic;
(2) the method has merged numerical model analysis emulation and field test two kinds of optimization methods.The method is different from the limitation of the simulation method that existing unit parameter optimizing research is taked more, but numerical model analysis emulation and field test two kinds of methods are merged, first determine unit to be optimized and corresponding parameter by simulation method, then by field test feedback, the validity revising, verify Optimal Parameters; Make proposed method can be applicable to on-the-spot actual set better;
(3) the method effectively can strengthen system damping; By optimizing the parameters of excitation system of crucial nuclear power generating sets in electrical network, not only improving unit homeostasis operation level, and can effectively strengthen system-wide positive damping, safeguards system when high-power conveying to stable operation during various disturbance.
Accompanying drawing explanation
Fig. 1 is the inventive method flow chart.
Fig. 2 is the modal graph of interconnected network oscillation mode.
Fig. 3 is the FS type figure in the corresponding simulated program of excitation system of the present invention.
Fig. 4 is the unloaded 5% step replicating machine terminal voltage response curve of generator of the present invention.
Fig. 5 is generator loading 5% step simulation hair power of motor response curve of the present invention.
Fig. 6 is that the present invention's excitation parameter that dispatches from the factory issues empty load of motor 5% step actual measurement set end voltage response curve.
Fig. 7 is that the present invention optimizes excitation parameter and issues empty load of motor 5% step actual measurement set end voltage response curve.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is specifically described.
As shown in Figure 1, a kind of nuclear power generating sets excitation and PSS parameter optimization setting method strengthening system damping of the present invention, comprises the steps,
Step S1: the modal graph analyzing simulated grid oscillation mode, choose the nuclear power generating sets of parameter to be optimized: emulated by numerical model analysis, the analysis of frequency domain character value and time domain disturbance emulation are carried out to simulated grid, extracts the interregional dynamic stability feature of interconnected network and oscillation information;
Step S2: the excitation system model analysis of nuclear power generating sets, determines parameter to be optimized: the excitation system of described nuclear power generating sets adopts two machine brushless excitation systems; Described step S2 is concrete namely: for the T3/T4 ratio in excitation multiplication factor, exciter saturation coefficient, Kc, Kd numerical value and pid parameter, in analysis excitation system, each parameter is on the sensitivity of the impact of system damping level, and the adjustment of analysis PSS parameter is to the compensation of excitation system hysteresis characteristic, to the influence degree of the damping level of system
Step S3: the emulation of excitation system response performance and on-the-spot actual set verification experimental verification: after adopting Optimal Parameters, carries out 5% unloaded step simulation calculation, the step response of detection system according to rower to the excitation system after employing Optimal Parameters.
Be below specific embodiments of the invention.
As shown in Figure 1, the nuclear power generating sets excitation of enhancing system damping of the present invention and PSS parameter optimize setting method, and implementation procedure is as follows,
Step one: the modal graph (as shown in Figure 2) analyzing simulated grid oscillation mode, chooses the nuclear power generating sets of parameter to be optimized.Analyze major network according to the modal graph of simulated grid oscillation mode and participate in the participation factors of the unit of vibration and right characteristic vector, specifically as shown in table 1, list the nuclear power generating sets that participation factors in oscillation mode is larger.
According to participation factors sequencing table, nuclear power generating sets participation factors being greater than the sequence number 1 ~ sequence number 8 of 0.5 screen, and are optimized the parameter of its unit.
Step 2: the excitation system model analysis of nuclear power generating sets, determines parameter to be optimized.Nuclear power generating sets excitation adopts two machine brushless excitations.FS type in the corresponding simulated program of this excitation system as shown in Figure 3.Survey according to nuclear power generating sets excitation parameter of dispatching from the factory, the parameter value corresponding to FS type fills in following table 2.
For four aspects such as the T3/T4 ratios in excitation multiplication factor, exciter saturation coefficient, Kc, Kd numerical value and pid parameter, in analysis excitation system, different parameters is on the sensitivity of the impact of system damping level, and result is as shown in table 3.
Can find out according to table 3, the T3/T4 ratio in the pid parameter of adjustment nuclear power generating sets excitation system, the damping level for system has comparatively significantly to be affected, and damping ratio improves 0.007.One group of Optimal Parameters is provided, in table 4 based on research above.
Due to the change of excitation parameter, the change of the uncompensated frequency characteristic of excitation system can be caused, also need the parameter of corresponding adjustment PSS with the hysteresis characteristic of good compensated excitation system, improve the damping level of system.According to the uncompensated frequency characteristic of parameters of excitation system after optimizing, one group of new PSS parameter is proposed, in table 5.
Step 3: the emulation of excitation system response performance and on-the-spot actual set verification experimental verification.After adopting Optimal Parameters, according to rower, 5% unloaded step simulation calculation is carried out to the excitation system after employing Optimal Parameters, obtain generator terminal voltage response curve as shown in Figure 4.Response curve indices meets rower requirement.
To the emulation of generator loading step, verify the validity of new PSS parameter, simulation curve as shown in Figure 5.
As can be seen from upper figure, the new PSS parameter of proposition has good phase compensation for excitation parameter after optimization, suppresses power oscillation successful, can provide enough dampings after disturbance.
Adopt Optimal Parameters and genuine parameter to carry out 5% step response respectively at nuclear power generating sets scene, waveform respectively as shown in Figure 6,7.According to power industry standard DL/T843-2003 " large turbo-type generator AC exciter excitation system technical conditions " the 5.10th article, the unloaded step response performance index request of generator: generator voltage overshoot is no more than 30% of step amount, the number of oscillation is no more than 3 times, regulation time is no more than 10 seconds, and voltage rising time is no more than 0.8 second.
As can be seen from Fig. 6,7 and table 6, adopt raw parameter and Optimal Parameters, unloaded 5% step response curve of generator all can meet service requirement.Compared with employing raw parameter, the excitation system response speed of Optimal Parameters is adopted to be further enhanced, the rise time of set end voltage response curve is reduced to 0.43s by 0.526s, and regulation time is reduced to 0.53s by 2.2s simultaneously, and excitation system can enter stable operation sooner.
Be more than preferred embodiment of the present invention, all changes done according to technical solution of the present invention, when the function produced does not exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.
Claims (5)
1. the nuclear power generating sets excitation and the PSS parameter that strengthen system damping optimize a setting method, it is characterized in that: comprise the steps,
Step S1: the modal graph analyzing simulated grid oscillation mode, chooses the nuclear power generating sets of parameter to be optimized;
Step S2: the excitation system model analysis of nuclear power generating sets, determines parameter to be optimized;
Step S3: the emulation of excitation system response performance and on-the-spot actual set verification experimental verification.
2. the nuclear power generating sets excitation of enhancing system damping according to claim 1 and PSS parameter optimize setting method; it is characterized in that: described step S1 is concrete namely: emulated by numerical model analysis; the analysis of frequency domain character value and time domain disturbance emulation are carried out to simulated grid, extracts the interregional dynamic stability feature of interconnected network and oscillation information.
3. the nuclear power generating sets excitation of enhancing system damping according to claim 1 and PSS parameter optimize setting method, and it is characterized in that: in described step S2, the excitation system of described nuclear power generating sets adopts two machine brushless excitation systems.
4. the nuclear power generating sets excitation of enhancing system damping according to claim 1 and PSS parameter optimize setting method, it is characterized in that: described step S2 is concrete namely: for the T3/T4 ratio in excitation multiplication factor, exciter saturation coefficient, Kc, Kd numerical value and pid parameter, in analysis excitation system, each parameter is on the sensitivity of the impact of system damping level, and the adjustment of analysis PSS parameter is to the compensation of excitation system hysteresis characteristic, to the influence degree of the damping level of system.
5. the nuclear power generating sets excitation of enhancing system damping according to claim 1 and PSS parameter optimize setting method, it is characterized in that: described step S3 is concrete namely: after adopting Optimal Parameters, according to rower, 5% unloaded step simulation calculation is carried out, the step response of detection system to the excitation system after employing Optimal Parameters.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104730936A (en) * | 2015-03-05 | 2015-06-24 | 国家电网公司 | Electromechanical transient model actual measuring and modeling method for nuclear power unit 39-phase self-excitation brushless excitation system |
| CN106383974A (en) * | 2016-11-08 | 2017-02-08 | 广西电网有限责任公司电力科学研究院 | Method for establishing simulation model of excitation system |
| CN106935115A (en) * | 2015-12-29 | 2017-07-07 | 中国电力科学研究院 | A kind of method for building up of generator excited system load module |
| CN107769229A (en) * | 2017-12-07 | 2018-03-06 | 国网河北省电力有限公司电力科学研究院 | A kind of multimachine PSS parameter optimization setting method for adapting to power network multi-operating condition |
| 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 |
| CN112748667A (en) * | 2020-12-22 | 2021-05-04 | 国网山东省电力公司电力科学研究院 | Method for on-line checking model parameters of automatic voltage regulator by using terminal voltage response curve |
| CN113013900A (en) * | 2021-03-26 | 2021-06-22 | 大唐国际发电股份有限公司北京高井热电厂 | Excitation regulator PSS2A model parameter configuration method |
| CN114725957A (en) * | 2022-04-22 | 2022-07-08 | 南方电网科学研究院有限责任公司 | Method and device for setting parameters of power system stabilizer |
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| CN104730936A (en) * | 2015-03-05 | 2015-06-24 | 国家电网公司 | Electromechanical transient model actual measuring and modeling method for nuclear power unit 39-phase self-excitation brushless excitation system |
| CN104730936B (en) * | 2015-03-05 | 2017-04-26 | 国家电网公司 | Electromechanical transient model actual measuring and modeling method for nuclear power unit 39-phase self-excitation brushless excitation system |
| CN106935115A (en) * | 2015-12-29 | 2017-07-07 | 中国电力科学研究院 | A kind of method for building up of generator excited system load module |
| CN106383974A (en) * | 2016-11-08 | 2017-02-08 | 广西电网有限责任公司电力科学研究院 | Method for establishing simulation model of excitation system |
| CN106383974B (en) * | 2016-11-08 | 2019-12-17 | 广西电网有限责任公司电力科学研究院 | Method for establishing simulation model of excitation system |
| CN107769229A (en) * | 2017-12-07 | 2018-03-06 | 国网河北省电力有限公司电力科学研究院 | A kind of multimachine PSS parameter optimization setting method for adapting to power network multi-operating condition |
| 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 |
| CN112748667A (en) * | 2020-12-22 | 2021-05-04 | 国网山东省电力公司电力科学研究院 | Method for on-line checking model parameters of automatic voltage regulator by using terminal voltage response curve |
| CN113013900A (en) * | 2021-03-26 | 2021-06-22 | 大唐国际发电股份有限公司北京高井热电厂 | Excitation regulator PSS2A model parameter configuration method |
| CN114725957A (en) * | 2022-04-22 | 2022-07-08 | 南方电网科学研究院有限责任公司 | Method and device for setting parameters of power system stabilizer |
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