CN107341570B - Reservoir filling phase runoff grading control power generation dispatching method under the conditions of a kind of random water - Google Patents

Reservoir filling phase runoff grading control power generation dispatching method under the conditions of a kind of random water Download PDF

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CN107341570B
CN107341570B CN201710493290.1A CN201710493290A CN107341570B CN 107341570 B CN107341570 B CN 107341570B CN 201710493290 A CN201710493290 A CN 201710493290A CN 107341570 B CN107341570 B CN 107341570B
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CN107341570A (en
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周建中
谢蒙飞
欧阳文宇
何中政
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Huazhong University of Science and Technology
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Abstract

The invention belongs to optimizing scheduling of reservoir field, the reservoir filling phase runoff grading control power generation dispatching method in the case of a kind of random water is disclosed.First, water storage phase two Phase flow is divided into two stages of period and remaining phase long duration that face, analysis reservoir history two Phase flow data for many years, the transition probability matrix between statistics obtains the current runoff of water storage phase day part and remaining phase long duration is averaged runoff.Then discrete water storage phase day part reservoir operating level and reservoir inflow, obtain the combination of day part reservoir level and reservoir inflow.For each combination, the remaining phase various stochastic averaginas of long duration, which are obtained, according to transition probability matrix enters flow valuve probability, being calculated makes present period and the remaining maximum decision flow value of phase long duration generated energy desired value, and combination, which is worked out, after calculating water storage phase all periods obtains runoff level control table (LCT).The method of the present invention can improve reservoir filling phase water provenance and generated energy in the case where looking to the future period water randomness.

Description

Reservoir filling phase runoff grading control power generation dispatching method under the conditions of a kind of random water
Technical field
The invention belongs to optimizing scheduling of reservoir field, a kind of be related in the case of random water reservoir filling phase runoff classification Control power generation dispatching method.
Background technology
Based on existing reservoir filling phase power generation dispatching theoretical research is mostly dispatched with deterministic optimization, the following water as Know, and due to Runoff Forecast precision problem, deterministic optimization scheduling achievement is difficult to be applied.
Reservoir capacity adjustment figure independent of Runoff Forecast, become current reservoir filling phase actual motion scheduling it is main according to According to.The routine dispactching figure drawn out according to typical low water annual discharge series are chosen, main purpose are to ensure that reservoir can smoothly store It is full.There is the reservoir of flood control task for flood season, the reservoir refill phase is shorter, preferable by scheduling graph operating effect.And for flood season without Flood control task reservoir, the water storage phase is especially long, is easy to store too early completely in most of time by traditional scheduler figure output division operation, after It can make later stage generation is more to abandon water if phase water is larger, reduce the generated energy and water provenance of all the period of time.
Therefore, a kind of more practicality and general reservoir filling phase progress control method are formulated to realizing reservoir filling phase hair Electrically optimized scheduling is significant.
Invention content
For the disadvantages described above or Improvement requirement of the prior art, the present invention provides the reservoirs in the case of a kind of random water Water storage phase runoff grading control power generation dispatching method, it is intended that formulating a kind of more practical and general reservoir filling phase Progress control method realizes the scheduling of reservoir filling phase generation optimization, improves the generated energy and water profit of all the period of time to the greatest extent With rate.
To achieve the above object, according to one aspect of the present invention, reservoir filling under the conditions of a kind of random water is provided Phase runoff grading control power generation dispatching method, includes the following steps：
Step 1：Water storage phase two Phase flow is divided into two stages of period and remaining phase long duration that face, analysis reservoir is gone through History two Phase flow data, the transition probability between statistics obtains the current runoff of water storage phase day part and remaining phase long duration is averaged runoff Matrix,
Step 2：To each period in the reservoir filling phase, the discretization period operating water level and reservoir inflow obtain water Whole combinations of the discrete operating water level of library day part and reservoir inflow,
Step 3：It is combined for each of water storage phase day part water level value and two Phase flow value, using turning in step 1 Move probability matrix and obtain and remain the phase various stochastic averaginas of long duration and enter flow valuve probability, the initial last water level of fixed schedule, to it is current when Section decision flow value is traversed, and optimization obtains making present period and the remaining maximum decision stream of phase long duration generated energy desired value Magnitude,
Step 4：Optimization calculates the decision stream under water storage phase all periods, all water level sections and reservoir inflow interval combinations Magnitude, combination establishment obtain runoff level control table (LCT), for controlling power station water storage phase generator operation.
Further, the transition probability matrix for acquisition being counted in step 1 is：
In formula, pij(QIt is remaining=qj|Qt=qi) represent t period diameter flow valuves QtFor qiAnd remaining phase long duration average diameter flow valuve QIt is remainingFor qjProbability.
Further, in step 2, to water storage phase all scheduling slots, by reservoir level it is discrete in range of operation be more A section [Hn,Hn+1], n=1,2 ..., N,
Wherein, n represents n-th of discrete operating water level, and N indicates discrete operating water level number,
Similarly for reservoir inflow, multiple section [Q are also separated within the scope of actual capabilitiesm,Qm+1], m=1,2 ..., M；M represents m-th of discrete reservoir inflow, and M indicates discrete reservoir inflow number,
Step 3：Median is taken to discrete water level section and the section that becomes a mandarin, for water storage phase day part water level value and storage Each combination of diameter flow valuve, the randomness for the water that looks to the future,
The remaining phase various stochastic averaginas of long duration, which are obtained, according to the transition probability matrix in step 1 enters flow valuve probability, it is fixed The first last water level of schedule periods, traverses present period decision flow value, optimization obtains different water level sections and reservoir inflow grade Under other, make present period and the maximum each decision flow value of remaining phase long duration generated energy desired value,
Step 4：Using the method in step 3, optimization calculates water storage phase all periods, all water level sections and reservoir inflow Decision flow value under interval combinations, combination establishment obtain runoff level control table (LCT), and the runoff level control table (LCT) is as follows,
Wherein, [Hn,Hn+1] indicate that n-th of discrete operating water level section, N indicate discrete operating water level number, [Qm,Qm+1] Indicate that m-th of discrete reservoir inflow section, M indicate that discrete reservoir inflow number, t indicate that t-th of period, T indicate total period Number, QTt,n,mIndicate that t-th of period water level is in n-th of section, aerial drainage under decision when reservoir inflow is in m-th of section Magnitude.
Further, the remaining phase long duration refers to the cumulative duration from second period to the water storage end of term.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show Beneficial effect：
The method of the present invention estimates the following various possible water scenes according to water storage phase present period two Phase flow size, if The Rational Decision flow and reservoir storage for having counted present period obtain different decision streams by being directed to present period difference runoff size Magnitude carries out runoff grading control scheduling to the water storage phase, can efficiently reduce the water storage phase and abandon water, improve water provenance, increase Generated energy.The runoff hierarchical control method proposed considers the randomness of the following water, has more practicability.
Description of the drawings
Fig. 1 is central diameter stream grading control power generation dispatching method implementing procedure figure of the embodiment of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not For limiting the present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below that Conflict is not constituted between this to can be combined with each other.
In the method for the present invention, water storage phase two Phase flow is divided into faces two ranks of period and remaining phase long duration first Section analyzes reservoir history two Phase flow data for many years, and statistics obtains the current runoff of water storage phase day part and remaining phase long duration is flat Transition probability matrix between equal runoff.Then reservoir level and reservoir inflow are separated into multiple areas within the scope of actual capabilities Between, each of all water level sections of water storage phase day part and reservoir inflow section are combined, obtained according to transition probability matrix It obtains the following remaining various stochastic averaginas of phase long duration and enters flow valuve probability, optimization, which is calculated, makes present period and remaining phase long duration The maximum decision flow value of generated energy desired value, combination establishment obtain runoff level control table (LCT), which can be used as the reservoir filling phase The foundation of power generation dispatching.
Fig. 1 is central diameter stream grading control power generation dispatching method implementing procedure figure of the embodiment of the present invention, as seen from the figure, the present invention Method specifically comprises the following steps：
Step 1：Water storage phase two Phase flow is divided into two stages of period and remaining phase long duration that face, analysis reservoir is more Year history two Phase flow data, the transfer between statistics obtains the current runoff of water storage phase day part and remaining phase long duration is averaged runoff Probability matrix, matrix P are as follows：
In formula, pij(QIt is remaining=qj|Qt=qi) represent t period diameter flow valuves QtFor qiAnd remaining phase long duration average diameter flow valuve QIt is remainingFor qjProbability.Described refers to the time for having hydrology historical records for many years, the remaining phase long duration refer to from second when Section arrives all periods in the water storage end of term, for example, it is assumed that the water storage phase is 10 days, 1 day period, facing the period refers to the 1st day, is left 9 days are the remaining phase.
Step 2：It is to water storage phase all scheduling slots, reservoir level is discrete for multiple section [H in range of operationn, Hn+1], n=1,2 ..., N；N represents n-th of discrete operating water level, and N indicates discrete operating water level number.It is flowed similarly for storage Amount, is also separated into multiple section [Q within the scope of actual capabilitiesm,Qm+1], m=1,2 ..., M；M represents m-th of discrete storage stream Amount, M indicate discrete reservoir inflow number.
Step 3：Median is taken to discrete water level section and the section that becomes a mandarin, for water storage phase day part water level value and storage It is long to obtain the phase of remaining according to the transition probability matrix in step 1 for each combination of diameter flow valuve, the randomness for the water that looks to the future Period various stochastic averaginas enter flow valuve probability, and the initial last water level of fixed schedule traverses present period decision flow value, excellent Change obtains under different water level sections and reservoir inflow rank, keeps present period and remaining phase long duration generated energy desired value maximum Each decision flow value.
Step 4：Using the method in step 3, optimization calculates water storage phase all periods, all water level sections and reservoir inflow Decision flow value under interval combinations, combination establishment obtain runoff level control table (LCT) to control power station water storage phase power generation fortune Row.
Runoff level control table (LCT) is as shown in table 1, in table 1, [Hn,Hn+1] indicate that n-th of discrete operating water level section, N indicate Discrete operating water level number, [Qm,Qm+1] indicate that m-th of discrete reservoir inflow section, M indicate discrete reservoir inflow number, t tables Show that t-th of period, T indicate total period number, QTt,n,mIndicate that t-th of period water level is in n-th of section, at reservoir inflow Decision letdown flow value when m-th of section.
Table 1 is runoff level control table (LCT)
The method of the present invention is described as follows with a specific embodiment below：
Step 1：By taking certain power station as an example, the water storage phase is 10 days, is the minimum period with day, and flow is from 3900m3/ s is extremely 17400m3/ s discrete is 9 sections.It is currently first period, the phase that remains is 9 days, analyzes reservoir history two Phase flow data, The transition probability matrix that statistics obtains water storage phase current runoff and the remaining phase is averaged between runoff is：
Step 2：Current level be 560 meters, scheduling end of term water level be 580 meters, by reservoir level between 560 to 580 meters from It dissipates for 200 sections, discrete precision is 0.1 meter.Similarly for reservoir inflow, in 3900m3/ s to 17400m3Discrete between/s is 9 A section, discrete precision are 1500m3/s。
Step 3：To first water level section and flow rate zone, water level is in section [560,560.1] rice, current reservoir inflow In section [3900,5400] m3/ s obtains remaining phase long duration mean inflow in section [3900,5400] m3The probability of/s is 0.48, in section [5400,6900] m3The probability of/s is 0.39, in section [6900,8400] m3The probability of/s is 0.1, in section [8400,9900]m3The probability of/s is 0.03.By this method, median is taken to simplify meter in reservoir inflow section and water level section It calculates, traverses present period decision flow value, optimization obtains keeping present period and remaining phase long duration generated energy desired value maximum Decision flow value is 2000m3/s。
And so on, it is combined for each of water storage phase day part water level value and two Phase flow value, being all calculated makes Present period and the maximum each decision flow value of remaining phase long duration generated energy desired value.
Step 4：Using the method in step 3, optimization calculates water storage phase all periods, all water level sections and reservoir inflow Decision flow value under interval combinations, combination establishment obtain runoff level control table (LCT) to control power station water storage phase power generation fortune Row.The runoff level control table (LCT) actually obtained is as shown in table 2.
Table 2 is runoff grading control table example
In the above chart, some decision flow values have been dispensed.Above embodiment is designed solely for the purpose of illustration the present invention The core idea of method does not need to provide specific runoff level control table (LCT) comprehensively.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include Within protection scope of the present invention.

Claims (4)

1. reservoir filling phase runoff grading control power generation dispatching method under the conditions of a kind of random water, which is characterized in that including such as Lower step：
Step 1：Water storage phase two Phase flow is divided into two stages of period and remaining phase long duration that face, analysis reservoir history enters Library diameter flow data, the transition probability square between statistics obtains the current runoff of water storage phase day part and remaining phase long duration is averaged runoff Battle array,
Step 2：To each period in the reservoir filling phase, it is each to obtain reservoir for the discretization period operating water level and reservoir inflow Whole combinations of period discrete operating water level and reservoir inflow,
Step 3：It is combined for each of water storage phase day part water level value and two Phase flow value, it is general using the transfer in step 1 Rate matrix obtains the remaining phase various stochastic averaginas of long duration and enters flow valuve probability, and the initial last water level of fixed schedule determines to present period Plan flow value is traversed, and optimization obtains making present period and the remaining maximum decision flow of phase long duration generated energy desired value Value,
Step 4：Optimization calculates the decision flow under water storage phase all periods, all water level sections and reservoir inflow interval combinations Value, combination establishment obtain runoff level control table (LCT), for controlling power station water storage phase generator operation.
2. the method as described in claim 1, which is characterized in that the transition probability matrix for counting acquisition in step 1 is：
In formula, pij(QIt is remaining=qj|Qt=qi) represent t period diameter flow valuves QtFor qiAnd remaining phase long duration average diameter flow valuve QIt is remainingFor qjProbability.
3. method as claimed in claim 2, which is characterized in that in step 2, to water storage phase all scheduling slots, by reservoir water It is multiple section [H that position is discrete in range of operationn,Hn+1], n=1,2 ..., N,
Wherein, n represents n-th of discrete operating water level, and N indicates discrete operating water level number,
Similarly for reservoir inflow, multiple section [Q are also separated within the scope of actual capabilitiesm,Qm+1], m=1,2 ..., M；M generations M-th of discrete reservoir inflow of table, M indicate discrete reservoir inflow number,
Step 3：Median is taken to discrete water level section and the section that becomes a mandarin, for water storage phase day part water level value and two Phase flow Each combination of value, the randomness for the water that looks to the future,
The remaining phase various stochastic averaginas of long duration, which are obtained, according to the transition probability matrix in step 1 enters flow valuve probability, fixed schedule Initial end water level, traverses present period decision flow value, optimization obtains under different water levels and reservoir inflow rank, makes to work as Preceding period and the maximum each decision flow value of remaining phase long duration generated energy desired value,
Step 4：Using the method in step 3, optimization calculates water storage phase all periods, all water level sections and reservoir inflow section Decision flow value under combination, combination establishment obtain runoff level control table (LCT), and the runoff level control table (LCT) is as follows：
Wherein, [Hn,Hn+1] indicate that n-th of discrete operating water level section, N indicate discrete operating water level number, [Qm,Qm+1] indicate M-th of discrete reservoir inflow section, M indicate that discrete reservoir inflow number, t indicate that t-th of period, T indicate total period number, QTt,n,mIndicate that t-th of period water level is in n-th of section, reservoir inflow is in decision letdown flow value when m-th of section.
4. the method as described in claim 1, which is characterized in that the remaining phase long duration refers to from second period to water storage All periods in the end of term.
CN201710493290.1A 2017-06-26 2017-06-26 Reservoir filling phase runoff grading control power generation dispatching method under the conditions of a kind of random water Active CN107341570B (en)

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