CN102664430A - Automatic generation control (AGC) method for generating sets of hydropower station - Google Patents
Automatic generation control (AGC) method for generating sets of hydropower station Download PDFInfo
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Abstract
The invention discloses an automatic generation control (AGC) method for generating sets of a hydropower station. The AGC method is used for controlling the active power output of a plurality of generating sets according to an active power set value of a scheduling instruction, and is characterized by comprising the following steps of: 1) determining the active power adjustable range of the hydropower station when all the generating sets run in a non-oscillation area; 2) if the active power set value is within the active power adjustable range of the hydropower station, allocating the active power output of each generating set on the basis of ensuring that all the generating sets run in the non-oscillation area; and 3) if the active power set value is beyond the active power adjustable range of the hydropower station, enabling the generating sets which run in the non-oscillation area and have the highest priorities to enter an oscillation area for running in turn according to a pre-designed priority strategy. According to the AGC method for the generating sets of the hydropower station, the safety and stability of the generating sets of the hydropower station are ensured, and the safety and stability of a power grid are combined.
Description
Technical field
The invention belongs to power domain, be specifically related to a kind of hydropower generator group AGC control method.
Background technology
Power adjusting device was in groups normally adopted in the hydroelectric station in the past, pressed realization load controlling functions such as flow (or pressing water level) adjusting device.After having adopted computer supervisory control system, the control field has obtained using widely automatic generation control (Automatic Generation Control is called for short AGC) function in the hydroelectric station.
In the load control of hydropower generator group, running into through regular meeting can not Operational Zone, i.e. problem such as the vibration of the hydraulic turbine, cavitation district.Vibrating area: the hydraulic turbine cavitation phenomenons can occur when necessarily exerting oneself section operation, the air flow over blade situation degenerates, and hydraulic turbine power descends, and efficient reduces, and flow passage components form cavitation corrosion, degrade even bore a hole.Be accompanied by the generation of cavitation; Also can produce noise and pressure fluctuation, the pulsation whirlpool band in the draft tube especially, when its frequency in case match with the natural frequency of vibration of associated components; Then must cause resonance; Cause the vibration of unit, the swing of exerting oneself etc., the safe operation of unit in serious threat, and this interval of exerting oneself is called the unit vibration district.The vibrating area of indivedual units even appear at the high efficient area of unit, power station are hidden vibrating area can be according to unit vibration sector number and size, but confirms the operation area of power station load, and obtains between unit Optimal Load and distribute according to keeping away the principle computation optimization of shaking.The vibrating area principle is hidden in the power station generally to be had and avoids unit frequently to pass through vibrating area, avoids the real load set-point that meritorious value assigns with the fastest speed Tracking dispatching of power netwoks etc. of sending out of unit load wide fluctuations and unit.
When the vibrating area of the hydraulic turbine excessive (surpassing unit capacity 2/3rds); Automatic generation control considers to avoid the vibrating area strategy; Can make unit regulate burden with power significantly; Because the governing speed and the performance of each unit are not quite similar, can occurring exerting oneself, the stable cross section trend to electrical network influences bigger situation when increasing and decreasing significantly.Section tidal current: the section in the electrical network is meant the formed interconnection of many branch roads family that connects between two areas; Section tidal current is the trend sum of each bar branch road of forming section, and it has clearly reflected the Power Exchange relation between two areas that section connected.The meritorious trend of supervision and control section can satisfy thermally-stabilised restriction and guarantee the stable and power system transient stability of regional voltage by the bonding branch road, finally guarantees the safety of whole electrical network.Existing hydroelectric station automatic generation control is too single to the strategy design that the hydraulic turbine is avoided vibrating area; Just make unit definitely avoid the vibrating area operation; But do not take into full account the specific (special) requirements of some vibrating area big (surpassing unit capacity 2/3rds) Hydropower Plant; Adopt the strategy of definitely avoiding vibrating area, can make unit increase significantly, subtract and exert oneself, cause the stable cross section trend influence of electrical network bigger.
Based on above problem, need a kind ofly avoid the vibrating area operation in the assurance Hydropower Plant most of the time, the automatic generation control that then allows the unit short time to operate in the vibrating area for some special operation condition realizes.
Summary of the invention
The invention provides a kind of solution of the above problems, a kind of safe and reliable hydropower generator group AGC control method is provided.
Technical scheme of the present invention provides a kind of hydropower generator group AGC control method, and it is the meritorious method of exerting oneself of meritorious several generating sets of set point control according to dispatch command, and it is characterized in that: it may further comprise the steps:
1) the meritorious adjustable extent in definite power station when all said generating sets all are in the operation of non-vibration district;
2) if when said meritorious set point is positioned at the meritorious adjustable extent in said power station, then guaranteeing that all said generating sets all are on the basis of non-vibration district operation, distribute the meritorious of each said generating set to exert oneself; Distribute the meritorious method of exerting oneself of each said generating set can select the following method of salary distribution one of them: mean allocation, by unit capacity equal proportion algorithm assigns, etc. little gaining rate algorithm assigns or dynamic programming algorithm distribution etc.
3), then, let the highest said generating set of priority that is in the operation of non-vibration district get into the vibrating area operation in turn according to the priority policy of design in advance if when said meritorious set point exceeds the meritorious adjustable extent in said power station.
Preferably, in the said step 3), said generating set is no more than 10 minutes in the time of said vibrating area operation.
Preferably; In the said step 3); Require said generating set must surpass 10 minutes if satisfy the scheduling of said meritorious set point, then give the alarm and manually the said generating set of vibrating area operation is adjusted vibrating area by the operations staff in the time of said vibrating area operation.
Preferably, in the said step 3), said priority policy is for being the priority Rule of judgment with all said generating sets in the cumulative time of vibrating area operation, and the priority of the said generating set that the cumulative time is minimum is the highest.
Preferably, in the said step 3), said priority policy is that the staff sets priority separately for all said generating sets in advance.
A kind of hydropower generator group AGC control method of the present invention preferentially makes unit avoid the vibrating area operation; In addition when increase and decrease is exerted oneself significantly; Then allow the unit short time to operate in the vibrating area for some special operation condition, thereby can avoid the special circumstances of electrical network section tidal current fluctuation.A kind of hydropower generator group AGC control method of the present invention had both guaranteed the safety and stability of Hydropower Plant, had taken into account the safety and stability of electrical network again.
Description of drawings
Fig. 1 is the program sequential chart of a kind of hydropower generator group AGC control method of the present invention.
Fig. 2 is the schematic diagram of a kind of hydropower generator group AGC control method of the present invention.
Embodiment
Following specific embodiments of the invention is described in further detail.
As shown in Figure 1, a kind of hydropower generator group AGC control method of the present invention can be controlled several generating sets of all generating sets of full factory or appointment, is the example explanation with all units of full factory below.The present invention adopts the program sequential chart of conventional automatic generation control.At first configuration file is read in the initialization data storehouse, and COM1 is set, initial message formation, received communication data then, refresh.Get into pretreatment module, main reading of data from message queue, from the logical source reading of data, from the multicast reading of data and deal with data.Get into distribution module at last, mainly carry out LOAD FREQUENCY control and calculate, multicast packet, the transmission value of establishing letter literary composition, formation curve.As shown in Figure 2, in sharing of load and the control of avoiding vibrating area operation, adopted following strategy:
Issue meritorious set point and be positioned within the meritorious adjustable extent in power station when the higher level dispatches mechanism, carry out burden apportionment, guarantee that the governing speed of the full AGC of factory reaches the scheduling requirement by keeping away the optimisation strategy of shaking normally.
Issue meritorious set point and be positioned at power station associating vibrating area (being outside the meritorious adjustable extent in power station) when the higher level dispatches mechanism; Then consider to get into the vibrating area operation by the separate unit unit; Other unit operations guarantee the flatness of adjusting in the non-vibration district, thereby reduce the influence to stabilization of power grids section tidal current.
Participate in the unit of AGC and take to take turns the way that flows into the vibrating area operation.
According to the length that operates in vibrating area unit accumulated time, the preferential entering vibrating area operation that the operation cumulative time is short; Perhaps set the priority that each unit gets into the vibrating area operation, the preferential entering vibrating area operation that priority is high by the operations staff.
Forbid that unit long-time (10 minutes) operates in vibrating area, surpasses 10 minutes and causes the unit fault easily.
When dispatching the meritorious set point of mechanism, the higher level rests on when surpassing 10 minutes in the full factory vibrating area and possibly influence unit safety; Power station AGC withdraws from automatically; The alarm operations staff notes simultaneously, and manually the unit output of vibrating area operation is adjusted vibrating area by the operations staff.
When the meritorious set point that the higher level dispatches mechanism was positioned at power station associating vibrating area, Mathematical Modeling was following:
In the formula: Δ P gets into the power station associating load difference that vibrating area produced for the higher level dispatches the meritorious set point of mechanism,
P
VimaxBe the preferential rated output that gets into the unit i of vibrating area operation; ∑ P
iSend out for all units are real sum meritorious; I=1,2 ..., n; P
UNiHBe the power station associating vibrating area l upper limit; P
UNiLBe power station associating vibrating area l lower limit.
Constraints is: P
Gimin≤P
IAGC≤P
Gimax
Above embodiment is merely the present invention's a kind of execution mode wherein, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with accompanying claims.
Claims (6)
1. hydropower generator group AGC control method, it is the meritorious method of exerting oneself of meritorious several generating sets of set point control according to dispatch command, it is characterized in that: it may further comprise the steps:
1) the meritorious adjustable extent in definite power station when all said generating sets all are in the operation of non-vibration district;
2) if when said meritorious set point is positioned at the meritorious adjustable extent in said power station, then guaranteeing that all said generating sets all are on the basis of non-vibration district operation, distribute the meritorious of each said generating set to exert oneself;
3), then, let the highest said generating set of priority that is in the operation of non-vibration district get into the vibrating area operation in turn according to the priority policy of design in advance if when said meritorious set point exceeds the meritorious adjustable extent in said power station.
2. a kind of hydropower generator group AGC control method according to claim 1 is characterized in that: in the said step 3), said generating set is no more than 10 minutes in the time of said vibrating area operation.
3. a kind of hydropower generator group AGC control method according to claim 2; It is characterized in that: in the said step 3); Require said generating set must surpass 10 minutes if satisfy the scheduling of said meritorious set point, then give the alarm and manually the said generating set of vibrating area operation is adjusted vibrating area by the operations staff in the time of said vibrating area operation.
4. a kind of hydropower generator group AGC control method according to claim 1; It is characterized in that: in the said step 3); Said priority policy is for being the priority Rule of judgment with all said generating sets in the cumulative time of vibrating area operation, and the priority of the said generating set that the cumulative time is minimum is the highest.
5. a kind of hydropower generator group AGC control method according to claim 1 is characterized in that: in the said step 3), said priority policy is that the staff sets priority separately for all said generating sets in advance.
6. a kind of hydropower generator group AGC control method according to claim 1 is characterized in that: distribute the meritorious method of exerting oneself of each said generating set to comprise said step 2): mean allocation, by unit capacity equal proportion algorithm assigns, etc. little gaining rate algorithm assigns or dynamic programming algorithm distribute.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013170597A1 (en) * | 2012-05-15 | 2013-11-21 | 国网电力科学研究院 | Hydraulic power station surge shaft agc control method |
| CN103499459A (en) * | 2013-09-23 | 2014-01-08 | 国家电网公司 | Collision and grinding fault early-warning method of water turbine |
| CN104538993A (en) * | 2015-01-16 | 2015-04-22 | 华中科技大学 | Cascaded automatic generation control method for hydropower station group |
| CN104617603A (en) * | 2015-01-23 | 2015-05-13 | 云南电网有限责任公司电力科学研究院 | Method for preventing hydropower station AGC (Automatic Generation Control) power from fluctuating |
| CN105870979A (en) * | 2016-05-19 | 2016-08-17 | 华能澜沧江水电股份有限公司 | Hydropower station AGC active allocation method based on unit commitment output model |
| CN106056236A (en) * | 2016-05-19 | 2016-10-26 | 华能澜沧江水电股份有限公司 | Hydropower station AGC combined output model and combined operation region calculation method |
| CN108039734A (en) * | 2018-01-10 | 2018-05-15 | 云南电网有限责任公司电力科学研究院 | A kind of renewable energy power generation power cluster control system, method |
| CN108732985A (en) * | 2018-05-21 | 2018-11-02 | 泰豪科技股份有限公司 | A method of control unit first puts into first off-the-line |
| CN110188994A (en) * | 2019-04-29 | 2019-08-30 | 贵州乌江水电开发有限责任公司 | Running priority grade assessment method in a kind of Hydropower Unit factory |
| CN111461502A (en) * | 2020-03-13 | 2020-07-28 | 四川华能宝兴河水电有限责任公司 | Calculation and control method for equivalent vibration area of power station |
| CN112068511A (en) * | 2020-08-11 | 2020-12-11 | 四川能投云电科技有限公司 | Small hydropower station automatic control water level and pressure signal data identification and screening method |
| CN113809759A (en) * | 2021-09-14 | 2021-12-17 | 中国长江电力股份有限公司 | Method for enabling single-vibration-area hydroelectric generating set to rapidly pass through vibration area through AGC |
| CN114597963A (en) * | 2022-02-15 | 2022-06-07 | 中国长江电力股份有限公司 | Method for hydropower station start-up and shut-down unit to quickly pass through vibration area through AGC |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013170597A1 (en) * | 2012-05-15 | 2013-11-21 | 国网电力科学研究院 | Hydraulic power station surge shaft agc control method |
| CN103499459A (en) * | 2013-09-23 | 2014-01-08 | 国家电网公司 | Collision and grinding fault early-warning method of water turbine |
| CN103499459B (en) * | 2013-09-23 | 2015-10-21 | 国家电网公司 | Hydraulic turbine Rubbing faults method for early warning |
| CN104538993A (en) * | 2015-01-16 | 2015-04-22 | 华中科技大学 | Cascaded automatic generation control method for hydropower station group |
| CN104538993B (en) * | 2015-01-16 | 2016-08-24 | 华中科技大学 | A kind of Hydropower Stations automatic power generation control method |
| CN104617603A (en) * | 2015-01-23 | 2015-05-13 | 云南电网有限责任公司电力科学研究院 | Method for preventing hydropower station AGC (Automatic Generation Control) power from fluctuating |
| CN106056236B (en) * | 2016-05-19 | 2019-10-01 | 华能澜沧江水电股份有限公司 | It is a kind of towards the multimachine compositional modeling method with more Operational Zone Hydropower Units |
| CN105870979A (en) * | 2016-05-19 | 2016-08-17 | 华能澜沧江水电股份有限公司 | Hydropower station AGC active allocation method based on unit commitment output model |
| CN106056236A (en) * | 2016-05-19 | 2016-10-26 | 华能澜沧江水电股份有限公司 | Hydropower station AGC combined output model and combined operation region calculation method |
| CN105870979B (en) * | 2016-05-19 | 2018-08-21 | 华能澜沧江水电股份有限公司 | A kind of active distribution method of AGC of Hydropower Stations based on Unit Combination output model |
| CN108039734B (en) * | 2018-01-10 | 2021-08-06 | 云南电网有限责任公司电力科学研究院 | Renewable energy power generation power cluster control system and method |
| CN108039734A (en) * | 2018-01-10 | 2018-05-15 | 云南电网有限责任公司电力科学研究院 | A kind of renewable energy power generation power cluster control system, method |
| CN108732985A (en) * | 2018-05-21 | 2018-11-02 | 泰豪科技股份有限公司 | A method of control unit first puts into first off-the-line |
| CN110188994A (en) * | 2019-04-29 | 2019-08-30 | 贵州乌江水电开发有限责任公司 | Running priority grade assessment method in a kind of Hydropower Unit factory |
| CN110188994B (en) * | 2019-04-29 | 2023-07-21 | 贵州乌江水电开发有限责任公司 | Method for evaluating running priority in hydropower unit plant |
| CN111461502A (en) * | 2020-03-13 | 2020-07-28 | 四川华能宝兴河水电有限责任公司 | Calculation and control method for equivalent vibration area of power station |
| CN112068511A (en) * | 2020-08-11 | 2020-12-11 | 四川能投云电科技有限公司 | Small hydropower station automatic control water level and pressure signal data identification and screening method |
| CN113809759A (en) * | 2021-09-14 | 2021-12-17 | 中国长江电力股份有限公司 | Method for enabling single-vibration-area hydroelectric generating set to rapidly pass through vibration area through AGC |
| CN113809759B (en) * | 2021-09-14 | 2023-08-08 | 中国长江电力股份有限公司 | Method for single vibrating area hydroelectric generating set to quickly pass through vibrating area through AGC |
| CN114597963A (en) * | 2022-02-15 | 2022-06-07 | 中国长江电力股份有限公司 | Method for hydropower station start-up and shut-down unit to quickly pass through vibration area through AGC |
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