CN105808889A - Frequency deviation factor simulation collocation method - Google Patents
Frequency deviation factor simulation collocation method Download PDFInfo
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Abstract
The invention provides a frequency deviation factor simulation collocation method. The method comprises the steps that a data model based on whole-process dynamic simulation and small disturbance and large disturbance fault sets for researching frequency characteristics are built; area natural frequency characteristic factors are calculated; a frequency deviation factor collocation scheme is formed preliminarily; the power grid frequency control ability on the small disturbance condition and power grid frequency recovery and area connecting line power control ability on the large disturbance state are analyzed in a simulation mode; if corresponding conditions are met, is shows that the effect of the frequency deviation factor collocation scheme is good; if not, the collocation scheme is adjusted, and a final frequency deviation factor collocation scheme is determined. The method considers comprehensive factors, is reasonable in scheme, and has good adaptability for different operation conditions and fault modes of a power grid, collocation of the reasonable frequency deviation factor scheme can be guided, and therefore the frequency recovery and connecting line power control ability of a power system under the small disturbance and large disturbance faults can be improved.
Description
Technical field
The present invention relates to field of power, be specifically related to a kind of frequency bias coefficient simulation configurations method.
Background technology
Interconnected electric power system requires that control frequency and interregional Tie line Power maintain planned value, and the technical way realizing this function at present is Automatic Generation Control (AGC).AGC is according to different control model real-time zonings control deviation (ACE), and keep ACE in prescribed limit by regulating meritorious the exerting oneself of each district AGC unit, so that frequency and Tie line Power return to planned value, it is achieved system generating and load balance under scheduled frequency.Control stability and the dynamic response characteristic of AGC are had significant impact by the selection of each control area frequency bias coefficient (B coefficient).
At present, all adopt fixing B coefficient both at home and abroad, and how to select the B coefficient of control area that control effect and the automatization level of system is more reasonable in final conclusion.For system frequency recovery and interregional dominant eigenvalues being controlled effect than Xuan Ge district difference B coefficient, adopt effectiveness and the reasonability of full dynamic simulation systematic analysis checking secular frequency adjustment.
Summary of the invention
For the deficiencies in the prior art, the present invention provides a kind of frequency bias coefficient simulation configurations method, simulation analysis interconnected network secular frequency controls dynamic process, based on the ultimate principle that frequency bias coefficient selects, work out a set of scientific and rational frequency bias coefficient simulation configurations method, thus improving frequency quality and the operational efficiency of whole system.
It is an object of the invention to adopt following technical proposals to realize:
A kind of frequency bias coefficient simulation configurations method, described method comprises the steps:
Step A: set up the data model based on full dynamic simulation；
Step B: set up the research microvariations of frequency characteristic, large disturbances fault set；
Step C: zoning natural frequency characteristic coefficient；
Step D: according to different Automatic Generation Control, preliminarily form the allocation plan of frequency bias coefficient；
Step E: the control ability of mains frequency in simulation analysis microvariations situation, if meeting corresponding conditions, thinks the respond well of this frequency bias coefficient allocation plan；If being unsatisfactory for, then allocation plan is adjusted；
Step F: under simulation analysis large disturbances malfunction, mains frequency recovers and region dominant eigenvalues control ability, if meeting corresponding conditions, thinks that this frequency bias coefficient allocation plan is respond well；If being unsatisfactory for, then allocation plan is adjusted, and determines the final allocation plan of frequency bias coefficient B.
Preferably, in described step A, component models closely-related with mains frequency dynamic response characteristic accurately is built, including Genset governor, AGC, power system stabilizer, load model and direct current frequency limiting control device FLC in based on the data model of full dynamic simulation.
Preferably, in described step B, microvariations fault set, including load fluctuation, dc power plan deviation, load prediction deviation and generation scheduling error；Large disturbances fault set includes, the outlet tripping operation of direct current locking, large-sized unit tripping operation and large power plant.
Preferably, in described step C, the natural frequency characteristic coefficient in region represents the Primary frequency control ability in region, is made up of following two parts, and its unit is MW/Hz:
β=KL+KG；
Wherein: KLFor the static frequency characteristic of load, KGStatic frequency characteristic for generating set；
β value can be passed through reality and measure and simulation calculation acquisition, considers weight coefficient k according to different electrical network actual demands0、k1、k2、…、kn, the computing formula of β is as follows:
β=k0β0+k1β1+k2β2…+knβn
Wherein, β0、β1、β2、…、βnComputational methods as follows:
β0For actual measured value；
β1By load growth method: the whole network AGC is exited, when simulating area load is according to given pace sustainable growth, field frequency change curve, the increase amount of load, i.e. region beta during recording frequency decline 0.1Hz1Value；
β2、…、βnBy high-power method of perturbation: the whole network AGC is exited, when high-power disturbance occurring in simulating area, field frequency change curve, the ratio of general power variable quantity Yu difference on the frequency calculate region beta respectively2、…、βnValue.
Preferably, in described step D, according to different Automatic Generation Control, preliminarily form frequency bias coefficient allocation plan:
For the power system of asynchronous operation, AGC is generally adopted and determines FREQUENCY CONTROL model F FC to maintain system frequency constant, and the exchange power on interconnection is uncontrolled, and under this control model, the B value of frequency bias coefficient is close and is slightly less than β value；
For comprising the interconnected electric power system of multiple control area, each control partition I1, I2..., IkMiddle AGC adopts and determines order wire frequency deviation control model TBC；In this control mode, the total B value of whole interconnected electric power system is close and is slightly less than β value, and the B value of each control partition configures by load accounting:
Wherein: PiFor the burden with power of control partition i, k is control partition number, BsTotal B value for whole interconnected electric power system.
Preferably, described step E comprises the following steps:
The situation of change of interconnected network frequency under simulation analysis microvariations fault；
Judge whether simulation result during microvariations fault meets corresponding conditions, if meeting, then it is assumed that frequency bias coefficient allocation plan is respond well；If being unsatisfactory for, then frequency bias coefficient being adjusted, in non-hunting of frequency situation, making mains frequency recover to the scope of 50 ± 0.1Hz.
Further, in described step E, the corresponding conditions that simulation result during microvariations fault meets is occurred to include:
Interconnected network steady frequency fsRecover to 50 ± 0.1Hz；And
AGC action starts in frequency retrieval process without hunting of frequency phenomenon；
If being unsatisfactory for above-mentioned condition, the Adjustment principle of frequency bias coefficient is as follows: if interconnected network steady frequency fsDo not recover to 50 ± 0.1Hz, then suitably increase B value；If frequency of occurrences oscillatory occurences therebetween, then suitably reduce B value.
Preferably, in described step F, under simulation analysis large disturbances malfunction, between interconnected network frequency and each control partition, the situation of change of Tie line Power deviation specifically includes: judge whether simulation result during large disturbances fault meets corresponding conditions, if meeting, thinks the respond well of frequency bias coefficient allocation plan；If being unsatisfactory for, then frequency bias coefficient being adjusted, making mains frequency recover to the scope of 50 ± 0.1Hz, and each by stages Tie line Power deviation controls at zone of reasonableness.
The described corresponding conditions judging to occur simulation result during large disturbances fault to meet includes:
1) interconnected network steady frequency fsRecover to the scope of 50 ± 0.1Hz；
2) action is started to frequency retrieval to the time t used by 49.9Hz from AGCαControl at zone of reasonableness；
3) dominant eigenvalues deviation delta PA→B, Δ PB→C... control at zone of reasonableness, and after AGC action, | Δ P | is reducing.
Further, in described step F, the principle that frequency bias coefficient is adjusted includes:
If fsDo not recover to the scope of 50 ± 0.1Hz, then suitably increase B value；If tαBeyond zone of reasonableness, then suitably increase B value；If after there is AGC action, | Δ P | increases phenomenon, then suitably reduce B value.
Further, if AGC adopts the control model of TBC, the configuration of frequency bias coefficient is carried out according to above-mentioned steps D；If AGC adopts FFC pattern, described step F does not consider about the content of Tie line Power deviation between each control partition.
Compared with the prior art, the present invention reaches to provide the benefit that:
1, a kind of frequency bias coefficient simulation configurations method provided by the invention, research interconnected network short-term and the dynamic simulation system of secular frequency adjustment are built, simulation analysis secular frequency controls dynamic process, fully takes into account the AGC important function recovered in microvariations lower frequency adjustment and large disturbances lower frequency and play in the dominant eigenvalues control of region.
2, Consideration of the present invention is comprehensive, scheme rationally, the different operating condition of electrical network and failure mode are had good adaptability.This emulation mode is conducive to instructing the rational frequency bias coefficient scheme of configuration, improves the power system frequency retrieval when microvariations and large disturbances fault and dominant eigenvalues control ability.
Accompanying drawing explanation
Fig. 1 is frequency bias coefficient simulation configurations method flow diagram provided by the invention；
Fig. 2 is the interconnection synchronised grids schematic diagram after extra-high voltage direct-current provided by the invention puts into；
Fig. 3 is that the rich big mode based model for load duration of side provided by the invention increases lower major network frequency variation curve schematic diagram；
Fig. 4 is major network frequency variation curve figure under three kinds of B coefficient allocation plans provided by the invention；In figure, a () major network frequency subtracts direct current in company with step and power plant exerts oneself change curve schematic diagram, b () major network frequency is with load fluctuation change curve schematic diagram, the lower three kinds of scheme major network frequency variation curve schematic diagrams of (c) Guangdong vacancy 5000MW fault, the lower three kinds of scheme Guizhou dominant eigenvalues change curve schematic diagrams of (d) Guangdong vacancy 5000MW fault.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
A kind of frequency bias coefficient simulation configurations method provided by the invention, fully take into account the AGC important function recovered in microvariations lower frequency adjustment and large disturbances lower frequency and play in the dominant eigenvalues control of region, simulation analysis secular frequency controls dynamic process, is conducive to instructing the rational frequency bias coefficient scheme of configuration；As it is shown in figure 1, comprise the steps:
Step A: set up the data model based on full dynamic simulation；Based on the data model of full dynamic simulation should be built component models closely-related with mains frequency dynamic response characteristic accurately in step A, including Genset governor, AGC, power system stabilizer, PSS (PSS), load model and direct current frequency limiting control device (FLC) etc..
Step B: set up the research microvariations of frequency characteristic, large disturbances fault set；In step B, the microvariations fault set of research frequency characteristic, including load fluctuation, dc power plan deviation, load prediction deviation and generation scheduling error etc.；Large disturbances fault set includes, the outlet tripping operation etc. of direct current locking, large-sized unit tripping operation and large power plant.
Step C: zoning natural frequency characteristic coefficient；The natural frequency characteristic coefficient in region represents the Primary frequency control ability in region, is made up of following two parts, and its unit is MW/Hz；
β=KL+KG；
Wherein: KLFor the static frequency characteristic of load, KGStatic frequency characteristic for generating set；
β value can be passed through reality and measure and simulation calculation acquisition, considers weight coefficient k according to different electrical network actual demands0、k1、k2、…、kn, the computing formula of β is as follows:
β=k0β0+k1β1+k2β2…+knβn
Wherein, β0、β1、β2、…、βnComputational methods as follows:
β0For actual measured value；
β1By load growth method: the whole network AGC is exited, when simulating area load is according to given pace sustainable growth, field frequency change curve, the increase amount of load, i.e. region beta during recording frequency decline 0.1Hz1Value；
β2、…、βnBy high-power method of perturbation: the whole network AGC is exited, when high-power disturbance (including direct current locking, large-sized unit tripping operation, large power plant outlet tripping operation, region and outskirt interconnection to cut-off) occurring in simulating area, field frequency change curve, is calculated region beta respectively by the ratio of general power variable quantity Yu difference on the frequency2、…、βnValue.
Step D: according to different Automatic Generation Control, such as AGC control model；Preliminarily form the allocation plan of frequency bias coefficient (B coefficient)；For the power system of asynchronous operation, AGC is generally adopted and determines FREQUENCY CONTROL model F FC, maintains system frequency constant, and the exchange power on interconnection is uncontrolled, and under this control model, the B value of frequency bias coefficient is close and is slightly less than β value；
For comprising the interconnected electric power system of multiple control area, each control partition I1, I2..., IkMiddle AGC adopts and determines order wire frequency deviation control model TBC；In this control mode, the total B value of whole interconnected electric power system is close and is slightly less than β value, and the B value of each control partition configures by load accounting:
Wherein: PiFor the burden with power of control partition i, k is control partition number, BsTotal B value for whole interconnected electric power system.
Step E: the control ability of mains frequency in simulation analysis microvariations situation, if meeting corresponding conditions, thinks the respond well of this frequency bias coefficient allocation plan；If being unsatisfactory for, then allocation plan is adjusted；
Condition then thinks that this frequency bias coefficient B allocation plan is respond well；If being unsatisfactory for, then allocation plan is adjusted, and determines the final allocation plan of frequency bias coefficient B.
Described step E comprises the following steps:
The situation of change of interconnected network frequency under simulation analysis microvariations fault；
Judge whether simulation result during microvariations fault meets corresponding conditions, including:
Interconnected network steady frequency fsRecover to 50 ± 0.1Hz；
AGC action starts in frequency retrieval process without hunting of frequency phenomenon.
If meeting, then it is assumed that frequency bias coefficient B allocation plan is respond well；If being unsatisfactory for, then frequency bias coefficient B being adjusted, in non-hunting of frequency situation, making mains frequency recover to the scope of 50 ± 0.1Hz.
The Adjustment principle of frequency bias coefficient B is as follows: if interconnected network steady frequency fsDo not recover to 50 ± 0.1Hz, then suitably increase B value；If frequency of occurrences oscillatory occurences therebetween, then suitably reduce B value.
If meeting corresponding conditions, think that this frequency bias coefficient B allocation plan is respond well；If being unsatisfactory for, then allocation plan is adjusted, and determines the final allocation plan of frequency bias coefficient B.Concretely comprise the following steps:
The situation of change of Tie line Power deviation between interconnected network frequency and each control partition under simulation analysis large disturbances malfunction；Judging whether simulation result during large disturbances fault meets corresponding conditions, if meeting, thinking the respond well of frequency bias coefficient (B coefficient) allocation plan；If being unsatisfactory for, then frequency bias coefficient (B coefficient) being adjusted, making mains frequency recover to the scope of 50 ± 0.1Hz, and each by stages Tie line Power deviation controls at zone of reasonableness.
In step F, the corresponding conditions that simulation result during large disturbances fault meets is occurred to include:
1) interconnected network steady frequency fsRecover to the scope of 50 ± 0.1Hz；
2) action is started to frequency retrieval to the time t used by 49.9Hz from AGCαControl at zone of reasonableness；
3) dominant eigenvalues deviation delta PA→B, Δ PB→C... control at zone of reasonableness, and after AGC action, | Δ P | is reducing.
The frequency bias coefficient B principle being adjusted is included:
If fsDo not recover to the scope of 50 ± 0.1Hz, then suitably increase B value；If tαBeyond zone of reasonableness, should suitably increase B value；If after there is AGC action, | Δ P | increases phenomenon, then suitably reduce B value.
If AGC adopts the control model of TBC, carry out the configuration of frequency bias coefficient B according to above-mentioned steps D；If AGC adopts FFC pattern, described step F does not consider about the content of Tie line Power deviation between each control partition.
Embodiment:
" 13 " initial stage Yunnan Power System nets asynchronous interconnection with south host, and forming transmitting terminal Yunnan Power System is a synchronised grids, and Guangxi, Guizhou, Guangdong, Hainan form southern host's net, i.e. receiving terminal synchronised grids.After entering Asynchronous Interconnection pattern, interconnecting owing to only being formed by DC line, all there is bigger change in the system run all right characteristic of Yunnan Power System and south host's net, original each district frequency bias coefficient needs again to adjust.On the south host's net be example, use frequency bias coefficient simulation configurations method provided by the invention, comprise the steps:
Step A: set up whole south electric network emulation data model under rich big mode in 2016, only interconnected by DC line between Yunnan Power System and south host's net.South electric network each province interconnecting relation schematic diagram is as shown in Figure 3.
Step B: set up the research microvariations of frequency characteristic, large disturbances fault set.Microvariations fault set includes: Guizhou, Guangdong, Guangxi load fluctuate in succession；Cattle reduces 100MW from dc power；Direct current is adjusted and reduced in synchronization, power plant exerts oneself.Large disturbances fault set includes: Chu Sui DC bipolar block, cattle from DC bipolar block, machine 2000MW is fallen in Guangdong, machine 2400MW is fallen in Guizhou, machine 1000MW is fallen in Guangxi.
Step C: calculate south host net natural frequency characteristic coefficient β.
(1) load growth method:
Major network AGC is exited by emulation, by the speed sustainable growth according to 1%/min of the major network load, major network frequency curve is as shown in Figure 3, it can thus be appreciated that under rich big mode, when load growth to 2689MW, major network frequency is dropped to 49.90Hz by 50.00Hz, therefore can assess and obtain the power versus frequency factor-beta of major network under rich big mode and be about 2689MW/0.1Hz.
(2) high-power method of perturbation:
Under rich big mode, the frequency simulation result under large disturbances power shortage is as shown in table 1:
Frequency result of calculation under the rich big mode large disturbances power shortage of table 1
| Fault type | Power shortage (MW) | Quasi-steady state recovers frequency (Hz) | β(MW/0.1Hz) |
| Permanent benefit Power Plant falls machine | 600 | 49.97 | 2000 |
| Little unconcerned Power Plant falls machine | 1000 | 49.97 | 3333 |
| Cattle is from one pole locking | 1600 | 49.95 | 3200 |
| General emigrant's one pole locking | 2500 | 49.91 | 2778 |
| Chu Sui one pole locking | 2500 | 49.91 | 2778 |
| Cattle is from bipolar locking | 3200 | 49.87 | 2462 |
| Chu Sui bipolar locking | 5000 | 49.81 | 2632 |
| Cattle is from+general emigrant two receipt locking | 4100 | 49.83 | 2412 |
| Chu Sui+general emigrant two receipt locking | 5000 | 49.81 | 2632 |
Step D: Zong Tiao main force's hydroelectric machine adopts determines FREQUENCY CONTROL pattern (FFC), always adjusting other directly to adjust unit to adopt and determine interconnection and frequency bias control pattern (TBC), in Guangdong, Guangxi, Guizhou, provinces and regions, Hainan four, straightening adjusts unit employing to determine interconnection and frequency bias control pattern (TBC).Based on the simulation analysis of step C, the natural frequency characteristic coefficient β of major network is between 2500～2800MW/0.1Hz.The B coefficient of AGC as far as possible close to β value, should consider that AGC possesses certain less stress condition simultaneously, so that AGC will not frequently adjust repeatedly, and forming frequency deviation factor (B coefficient) allocation plan B1:
Table 2 frequency bias coefficient (B coefficient) allocation plan B1
| Scheme | Total straightening is adjusted | Guangdong | Guangxi | Guizhou | Hainan |
| B1 | 110 | 1500 | 106 | 170 | 25 |
Step E: the control ability of mains frequency in simulation analysis microvariations situation.Simulation result shows, in the microvariations situations such as load fluctuation, direct current plan deviation, and allocation plan B1The control effect of systematic steady state frequency can be met, by south major network FREQUENCY CONTROL in the scope of 50 ± 0.1Hz, and the problem of non-frequency of occurrences vibration.
Step F: under simulation analysis large disturbances fault, mains frequency recovers and region dominant eigenvalues control ability.
Table 3 allocation plan B1Major network system response under corresponding different capacity vacancy
By the simulation result of table 3 it can be seen that allocation plan B1In frequency retrieval, under Chu Sui DC bipolar block fault, (major network power shortage is 5000MW) major network frequency can not return to 49.9Hz；In tie--line control, contact section tidal current value added is in equal tolerance interval.For the problem that Chu Sui DC bipolar block fault major network frequency can not return to 49.9Hz, it is considered to increase B value, form allocation plan B2。
Table 4 frequency bias coefficient (B coefficient) allocation plan B2
| Scheme | Total straightening is adjusted | Guangdong | Guangxi | Guizhou | Hainan |
| B2 | 110 | 1500 | 384 | 580 | 25 |
Simulation analysis allocation plan B2Recover and region dominant eigenvalues control ability for mains frequency under microvariations and large disturbances fault.In microvariations situation, allocation plan B2The control effect of systematic steady state frequency can be met, by south major network FREQUENCY CONTROL in the scope of 50 ± 0.1Hz, and the problem of non-frequency of occurrences vibration.Under large disturbances fault, allocation plan B2The control effect of systematic steady state frequency can be met, but Guizhou send Guangxi contact section tidal current to continue to increase after AGC participates in, it is considered to B value should be reduced, form allocation plan B3。
Table 5 frequency bias coefficient (B coefficient) allocation plan B3
| Scheme | Total straightening is adjusted | Guangdong | Guangxi | Guizhou | Hainan |
| B3 | 110 | 1500 | 245 | 295 | 25 |
To allocation plan B3Carrying out Adaptability Analysis, simulation result shows, allocation plan B under microvariations and large disturbances fault3Take into account frequency retrieval value and the effect (three kinds of allocation plan comparison charts of B coefficient are as shown in Figure 4) of dominant eigenvalues control.Therefore, major network AGC recommends allocation plan B3, i.e. the whole network 2150MW/0.1Hz, 110MW/0.1Hz, Guangdong 1500MW/0.1Hz, Guangxi 245MW/0.1Hz, Guizhou 295MW/0.1Hz, Hainan 25MW/0.1Hz are adjusted in total straightening.
A kind of frequency bias coefficient simulation configurations method provided above, is conducive to instructing and configures rational frequency bias coefficient scheme, not only possesses the advantages such as strong adaptability, Consideration be comprehensive, and has higher practical value and good market prospect.Finally should be noted that: above example is only in order to illustrate that technical scheme is not intended to limit, although the present invention being described in detail with reference to above-described embodiment, those of ordinary skill in the field are it is understood that still can modify to the specific embodiment of the present invention or equivalent replacement, and without departing from any amendment of spirit and scope of the invention or equivalent replace, it all should be encompassed in the middle of scope of the presently claimed invention.
Claims (10)
1. a frequency bias coefficient simulation configurations method, it is characterised in that described method comprises the steps:
Step A: set up the data model based on full dynamic simulation；
Step B: set up the research microvariations of frequency characteristic, large disturbances fault set；
Step C: zoning natural frequency characteristic coefficient；
Step D: according to different Automatic Generation Control, preliminarily forms frequency bias coefficient allocation plan；
Step E: the control ability of mains frequency in simulation analysis microvariations situation, if meeting corresponding conditions, thinks the respond well of this frequency bias coefficient allocation plan；If being unsatisfactory for, then allocation plan is adjusted；
Step F: the mains frequency under simulation analysis large disturbances malfunction recovers and region dominant eigenvalues control ability, if meeting corresponding conditions, thinks that this frequency bias coefficient allocation plan is respond well；If being unsatisfactory for, then allocation plan is adjusted, and determines the final allocation plan of frequency bias coefficient.
2. method according to claim 1, it is characterized in that, in described step A, component models closely-related with mains frequency dynamic response characteristic accurately is built, including Genset governor, AGC, power system stabilizer, load model and direct current frequency limiting control device FLC in based on the data model of full dynamic simulation.
3. method according to claim 1, it is characterised in that in described step B, microvariations fault set includes, load fluctuation, dc power plan deviation, load prediction deviation and generation scheduling error；Large disturbances fault set includes, the outlet tripping operation of direct current locking, large-sized unit tripping operation and large power plant.
4. method according to claim 1, it is characterised in that in described step C, the natural frequency characteristic coefficient β in region represents the Primary frequency control ability in region, is made up of following two parts, and its unit is MW/Hz；
β=KL+KG；
Wherein: KLFor the static frequency characteristic of load, KGStatic frequency characteristic for generating set；
β value can be passed through reality and measure and simulation calculation acquisition, considers weight coefficient k according to different electrical network actual demands0、k1、k2、…、kn, the computing formula of β is as follows:
β=k0β0+k1β1+k2β2…+knβn
Wherein, β0、β1、β2、…、βnComputational methods as follows:
β0For actual measured value；
β1By load growth method: the whole network AGC is exited, when simulating area load is according to given pace sustainable growth, field frequency change curve, the increase amount of load, i.e. region beta during recording frequency decline 0.1Hz1Value；
β2、…、βnBy high-power method of perturbation: the whole network AGC is exited, when high-power disturbance occurring in simulating area, field frequency change curve, the ratio of general power variable quantity Yu difference on the frequency calculate region beta respectively2、…、βnValue.
5. method according to claim 1, it is characterised in that in described step D, according to different Automatic Generation Control, preliminarily forms frequency bias coefficient allocation plan and includes:
For the power system of asynchronous operation, AGC is generally adopted and determines FREQUENCY CONTROL model F FC to maintain system frequency constant, and the exchange power on interconnection is uncontrolled, and under this control model, the B value of frequency bias coefficient is close and is slightly less than β value；
For comprising the interconnected electric power system of multiple control area, each control partition I1, I2..., IkMiddle AGC adopts and determines order wire frequency deviation control model TBC；In this control mode, the total B value of whole interconnected electric power system is close and is slightly less than β value, and the B value of each control partition configures by load accounting:
Wherein: PiFor the burden with power of control partition i, k is control partition number, BsTotal B value for whole interconnected electric power system.
6. method according to claim 1, it is characterised in that described step E comprises the following steps:
The situation of change of interconnected network frequency under simulation analysis microvariations fault；
Judge whether simulation result during microvariations fault meets corresponding conditions, if meeting, then it is assumed that frequency bias coefficient allocation plan is respond well；If being unsatisfactory for, then frequency bias coefficient being adjusted, in non-hunting of frequency situation, making mains frequency recover to the scope of 50 ± 0.1Hz.
7. method according to claim 6, it is characterised in that in described step E, occurs the corresponding conditions that simulation result during microvariations fault meets to include:
Interconnected network steady frequency fsRecover to 50 ± 0.1Hz；And
AGC action starts in frequency retrieval process without hunting of frequency phenomenon；
If being unsatisfactory for above-mentioned condition, the Adjustment principle of frequency bias coefficient is as follows: if interconnected network steady frequency fsDo not recover to 50 ± 0.1Hz, then suitably increase B value；If frequency of occurrences oscillatory occurences therebetween, then suitably reduce B value.
8. method according to claim 1, it is characterized in that, in described step F, under simulation analysis large disturbances malfunction, between interconnected network frequency and each control partition, the situation of change of Tie line Power deviation specifically includes: judge whether simulation result during large disturbances fault meets corresponding conditions, if meeting, thinks the respond well of frequency bias coefficient allocation plan；If being unsatisfactory for, then frequency bias coefficient being adjusted, making mains frequency recover to the scope of 50 ± 0.1Hz, and each by stages Tie line Power deviation controls at zone of reasonableness.
The described corresponding conditions judging to occur simulation result during large disturbances fault to meet includes:
1) interconnected network steady frequency fsRecover to the scope of 50 ± 0.1Hz；
2) action is started to frequency retrieval to the time t used by 49.9Hz from AGCαControl at zone of reasonableness；
3) dominant eigenvalues deviation delta PA→B, Δ PB→C... control at zone of reasonableness, and after AGC action, | Δ P | is reducing.
9. method according to claim 8, it is characterised in that in described step F, the principle that frequency bias coefficient is adjusted includes:
If fsDo not recover to the scope of 50 ± 0.1Hz, then suitably increase B value；If tαBeyond zone of reasonableness, then suitably increase B value；If after there is AGC action, | Δ P | increases phenomenon, then suitably reduce B value.
10. method according to claim 1 or 5, it is characterised in that if AGC adopts the control model of TBC, carry out the configuration of frequency bias coefficient according to above-mentioned steps D；If AGC adopts FFC pattern, described step F does not consider about the content of Tie line Power deviation between each control partition.
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| CN107749631A (en) * | 2017-10-25 | 2018-03-02 | 国电南瑞科技股份有限公司 | Unit Primary frequency control ability predictor method |
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| CN109950905A (en) * | 2019-04-23 | 2019-06-28 | 国电南瑞科技股份有限公司 | A kind of network load statistical method |
| CN110417031A (en) * | 2019-07-05 | 2019-11-05 | 国电南瑞科技股份有限公司 | A kind of automatic electricity generation control system frequency bias coefficient segmentation setting method |
| CN110854852A (en) * | 2019-11-29 | 2020-02-28 | 中国南方电网有限责任公司 | Method for configuring key parameters of AGC (automatic gain control) master station in high-proportion hydropower region |
| CN112186777A (en) * | 2020-09-03 | 2021-01-05 | 中国南方电网有限责任公司 | AGC frequency deviation coefficient adjusting method, system and device for inhibiting frequency oscillation |
| CN112821383A (en) * | 2021-01-04 | 2021-05-18 | 国网重庆市电力公司 | Power system natural frequency characteristic coefficient interval prediction method based on deep learning |
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| CN106908660B (en) * | 2017-02-27 | 2019-07-12 | 国家电网公司 | Mains frequency static characteristic coefficient testing method under the conditions of non-grid large disturbances |
| CN106908660A (en) * | 2017-02-27 | 2017-06-30 | 国家电网公司 | Mains frequency static characteristic coefficient testing method under the conditions of non-grid large disturbances |
| CN107749631A (en) * | 2017-10-25 | 2018-03-02 | 国电南瑞科技股份有限公司 | Unit Primary frequency control ability predictor method |
| CN107749631B (en) * | 2017-10-25 | 2020-10-30 | 国电南瑞科技股份有限公司 | Unit primary frequency modulation capability pre-estimating method |
| CN108988359A (en) * | 2018-08-01 | 2018-12-11 | 深圳供电局有限公司 | Non-linear automatic power generation control method, device, equipment and medium |
| CN109950905A (en) * | 2019-04-23 | 2019-06-28 | 国电南瑞科技股份有限公司 | A kind of network load statistical method |
| CN109950905B (en) * | 2019-04-23 | 2022-08-26 | 国电南瑞科技股份有限公司 | Power grid load statistical method |
| CN110417031B (en) * | 2019-07-05 | 2021-06-11 | 国电南瑞科技股份有限公司 | Method for sectionally setting frequency deviation coefficient of automatic power generation control system |
| CN110417031A (en) * | 2019-07-05 | 2019-11-05 | 国电南瑞科技股份有限公司 | A kind of automatic electricity generation control system frequency bias coefficient segmentation setting method |
| CN110854852A (en) * | 2019-11-29 | 2020-02-28 | 中国南方电网有限责任公司 | Method for configuring key parameters of AGC (automatic gain control) master station in high-proportion hydropower region |
| CN110854852B (en) * | 2019-11-29 | 2023-12-29 | 中国南方电网有限责任公司 | Configuration method of key parameters of AGC main station in high-proportion hydropower area |
| CN112186777B (en) * | 2020-09-03 | 2022-03-15 | 中国南方电网有限责任公司 | AGC frequency deviation coefficient adjusting method, system and device for inhibiting frequency oscillation |
| CN112186777A (en) * | 2020-09-03 | 2021-01-05 | 中国南方电网有限责任公司 | AGC frequency deviation coefficient adjusting method, system and device for inhibiting frequency oscillation |
| CN112821383A (en) * | 2021-01-04 | 2021-05-18 | 国网重庆市电力公司 | Power system natural frequency characteristic coefficient interval prediction method based on deep learning |
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