CN105391093B - Small hydropower system is incorporated into the power networks Optimization Scheduling - Google Patents
Small hydropower system is incorporated into the power networks Optimization Scheduling Download PDFInfo
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Abstract
It is incorporated into the power networks Optimization Scheduling the invention discloses a kind of small hydropower system, methods described includes：Predict and analyze the power producing characteristics of current region different type small power station；Credible prediction and mathematical modeling are carried out, show that the space-time power producing characteristics of the small power station, the mechanism of reciprocal effect, typical case are exerted oneself feature；Carry out regional reference load prediction；Complete load optimal；Carry out the independent control of voltage power-less；According to the power producing characteristics of the small power station, the result of the load prediction, by load optimal, using regional power grid the lowest coursing cost as target, using power distribution network safe operating conditions as constraint, scheduling is optimized to whole small power stations and exerted oneself, the space-time for obtaining each small power station is exerted oneself result.The present invention considers the good and bad feature of water storage type and radial-flow type small power station, and reasonably optimizing is exerted oneself, and draws the scheduling result of small hydropower system, makes the grid-connected economical operation of regional power grid.
Description
Technical field
The present invention relates to electric power network technique field, more particularly to a kind of small hydropower system is incorporated into the power networks Optimization Scheduling.
Background technology
When the grid structure of regional power grid is weak, during in face of natural calamity, the fragility of regional power grid is completely exposed, transformer station
Decompression, electrical breakdown has a strong impact on the stabilization of civil order and the quality of life of resident.Disliked herein in part small power station through investigating
Still possess generating capacity under bad natural conditions, but due to lacking scheduling and technological means, it is impossible to it is important to utilize local water power
Load fast power restoration, can only be waited after interconnection repairing recovery, just recovered major network and powered.
The area enriched for small hydropower resources, rationally using green resource, has voltage support idle regional power grid
The significances such as compensation.With the development of hydropower, most power stations are all incorporated into the power networks with bulk power grid, are solved over
The a series of problems brought during the isolated operation of power station, such as power supply reliability are poor, the quality of power supply is poor, carrying load ability difference.Work as area
When domain power network departs from bulk power grid, the power supply of important load can be effectively ensured, there is higher smart than normal areas power network.
As large-scale small hydropower system generates electricity by way of merging two or more grid systems a kind of dispatching method of, it is necessary to which small hydropower system is incorporated into the power networks optimization,
Can be on the premise of quality of voltage be ensured, it is considered to can reduce exerting oneself for firepower electrical plant under economical operation, normal grid-connect mode,
Realize that small hydropower system containing polymorphic type is incorporated into the power networks Optimized Operation, make the low-carbon environment-friendly energy and realize sustainable development.
The content of the invention
To solve existing technical problem, the embodiment of the present invention provides a kind of small hydropower system and is incorporated into the power networks Optimized Operation
Method.
To reach above-mentioned purpose, what the technical scheme of the embodiment of the present invention was realized in：
A kind of small hydropower system is incorporated into the power networks Optimization Scheduling, and methods described includes：
Predict and analyze the power producing characteristics of current region different type small power station；
According to the historical data and the power producing characteristics of each small power station of the prediction and analysis, carry out credible prediction and mathematics is built
Mould, show that the space-time power producing characteristics of the small power station, the mechanism of reciprocal effect, typical case are exerted oneself feature；
Carry out regional reference load prediction；
The different active control strategies of load are constituted using the different active control devices of load, passed sequentially through described
The active control strategy of different loads adjusts load peak determined by the load prediction, completes load optimal；
Carry out the independent control of voltage power-less；
According to the power producing characteristics of the small power station, the result of the load prediction, by load optimal, transported with regional power grid
Row network minimal is target, using power distribution network safe operating conditions as constraint, selection ant group algorithm, genetic algorithm or simulated annealing
Whole small power stations are optimized scheduling and exerted oneself by Algorithm for Solving, and the space-time for obtaining each small power station is exerted oneself result.
Wherein, the described active control device of different loads includes：Electricity price stimulate, enterprise move peak, energy storage, and/or
Rack is reconstructed；Four kinds of active control devices of load are separate.
Wherein, the independent control of the voltage power-less includes：Load tap changer is adjusted and power capacitor switching.
Wherein, the power producing characteristics predicted and analyze current zone different type small power station, including：Pickup area power network
The distributed data and categorical data of interior each small power station, determine small power station's machine set type and capacity, to water storage type small power station and footpath
Streaming small power station carries out initial analysis, analyzes the influence factor and historical factor of small power station, gathers the precipitation character of current region
Data, draw the power producing characteristics for each small hydropower station under all kinds of weather.
Wherein, all kinds of weather include typhoon early warning weather.
Compared with prior art, the small hydropower system of the invention Optimization Scheduling that is incorporated into the power networks has the beneficial effect that：
1st, first by the optimization of water storage type small power station in the schedule of micro-capacitance sensor, for the spy of water storage type small power station energy storage
Point, can effectively utilize the radial-flow type small power station in daily low power consumption period to generate electricity remaining, make full use of the energy；And can with
Give certain electric power support in electric peak period.
2nd, aspect is dispatched in small hydropower system, has taken into full account the proactive mechanisms management of load, reference load is optimized,
Load spatial and temporal distributions are made to be more beneficial for power station scheduling.
3rd, weak for regional power grid, the optimization of the small hydropower station in the regional power grid rich in a large amount of small hydropower systems again is adjusted
Degree, can be effectively ensured the power supply of load, and renewable resource can be effectively utilized again, and energy-conserving and environment-protective reduce operating cost.
Brief description of the drawings
In accompanying drawing (it is not necessarily drawn to scale), similar reference phase described in different views
As part.Similar reference numerals with different letter suffix can represent the different examples of similar component.Accompanying drawing is with example
Unrestricted mode generally shows each embodiment discussed herein.
Fig. 1 is that small hydropower system of the embodiment of the present invention is incorporated into the power networks the flow chart of Optimization Scheduling.
Embodiment
In view of the shortcomings of the prior art, the invention provides a kind of Optimized Operation that is incorporated into the power networks of small hydropower system containing polymorphic type
Method, considers the good and bad feature of water storage type and radial-flow type small power station, and reasonably optimizing is exerted oneself, and draws the scheduling knot of small hydropower system
Really, the grid-connected economical operation of regional power grid is made.
As shown in figure 1, small hydropower system of the present invention is incorporated into the power networks, Optimization Scheduling comprises the following steps：
Step 101：Predict the power producing characteristics of simultaneously analyzed area different type small power station；
Specifically, each small power station in the distribution of each small power station in investigation regional power grid and type, pickup area power network
Distributed data and categorical data；Small power station's machine set type and capacity are determined, to water storage type small power station (adjustable water power of exerting oneself
Stand, equivalent to battery) and radial-flow type small power station (current are exerted oneself with fluctuation with season, weather and time change) enter
Row initial analysis, analysis small power station's influence factor and its historical factor, system summary, collection are carried out to the precipitation character of this area
The precipitation character data of this area, draw the spy that exerts oneself for (including during typhoon early warning) each small hydropower station under all kinds of typical weathers
Property.
Step 2：According to the prediction and analysis of step 101, it is considered to delayed and cumulative effect, carry out credible prediction and model
Calculate, show that the space-time power producing characteristics of region small power station, the mechanism of reciprocal effect, typical case are exerted oneself feature；
Specifically, according to the historical data of step 101 and the power producing characteristics of each small power station, credible prediction is carried out, pin is drawn
To the power curve of (including during typhoon early warning) under all kinds of typical weathers, mathematical modeling is further carried out.
Step 103：The prediction of regional reference load；
Specifically, load prediction generally can be divided into ultra-short term, short-term, medium and long term prediction according to for different target,
Wherein short-term load forecasting refers to the load prediction of following one day to one week, be mainly used in Optimization of Unit Commitment, economic power flowcontrol,
Hydro thermal coordination etc..According to many factors such as the operation characteristic of system, increase-volume decision-making, natural conditions and social influences, one is utilized
The modern Forecasting Methodology based on emerging artificial intelligence subjects theory carries out effective load prediction a bit, mainly there is neutral net reason
By, expert system, fuzzy theory predicted method etc.；For main Load characteristics index, show that the Typical Agricultural load in area is special
Linearity curve, typical commercial load characteristic curve and typical industry load characteristic curve.
Step 104：The different active control strategies of load are constituted using the different active control devices of load, successively
Load peak determined by (reduction) step 103 is adjusted by the different active control strategies of load.
Step 105：The independent control of voltage power-less；
Specifically, for transforming plant voltage reactive control be limit value more than one, multiple target optimum control phenomenon, from control
Say mainly there are two methods in means：Load tap changer is adjusted and power capacitor switching.Regional power grid can be according to power network
The change automatic switching capacitor bank of power factor or voltage, makes in the range of power factor maintains a certain adjust, to realize nothing
Work(compensates or finds one group of load tap changer and capacitor group switching quantitative change amount by the method for artificial intelligence so that target
Function has optimal solution, draws a kind of Comprehensive Control result.
Step 106：Micro-capacitance sensor is normally incorporated into the power networks the Optimized Operation of small hydropower system under pattern.
Specifically, the power producing characteristics of the regional power grid Nei Ge small power stations drawn according to step 101~102, and step 103
Load prediction in the regional power grid of gained, the load optimal through step 104, using regional power grid the lowest coursing cost as target,
Using power distribution network safe operating conditions as constraint, selection ant group algorithm, genetic algorithm or simulated annealing are solved, to all small
Water power optimizes scheduling and exerted oneself, and the space-time for obtaining each small power station is exerted oneself result, and then finally gives the scheduling knot of small hydropower system
Really.
Pass through step 101~106 in the embodiment of the present invention, resulting small hydropower system schedule is to consider not
On the premise of same type small power station quality feature (including water storage type and radial-flow type small power station), regional power grid operating cost is caused most
It is small.
Wherein, the active control device of different loads described in step 104 can include any in following four kinds
One or more of combinations：1. electricity price is stimulated；2. enterprise moves peak；3. energy storage；4. rack is reconstructed；The active control hand of four kinds of loads
Section is separate, the direct or indirect change payload of energy, so as to reduce the load peak in typical day load curve.
Specifically, electricity price stimulates to refer to stimulates user power utilization behavior by implementing time-of-use tariffs, load is directly reduced；Enterprise's shifting peak, which refers to, to be passed through
Contract transfer enterprise of enterprise load, directly reduces load；Energy storage refers to by energy storage device in load valley period storage electric energy, height
The peak period discharges electric energy, directly reduces load.Rack is reconstructed, and is the grid structure extended according to determined by step 104, is passed through
Input or excision circuit change trend distribution, and load is reduced indirectly.
Specifically, in step 105 for transforming plant voltage reactive control be limit value more than one, multiple target optimum control show
As mainly having two methods from control device：Load tap changer is adjusted and power capacitor switching.Specifically, its base
This control law is：1) after the upper (lower) tune of depressor tap, voltage will become big (small), idle to become big (small), and power factor diminishes
(big)；2) after input (exiting) capacitor, idle to diminish (big), voltage becomes big (small), and power factor becomes big (small).Practical application
In, regional power grid can maintain power factor according to the change automatic switching capacitor bank with power factor of electric network or voltage
It is a certain adjust in the range of, realize reactive-load compensation or one group of load tap changer and electric capacity found by the method for artificial intelligence
Device group switching quantitative change amount so that object function has optimal solution, draws a kind of Comprehensive Control result.
The small hydropower system of the present invention is incorporated into the power networks Optimization Scheduling, first by the optimization of water storage type small power station in micro-capacitance sensor
In schedule, the characteristics of for the energy storage of water storage type small power station, it can effectively utilize the radial-flow type in daily low power consumption period small
Water power generates electricity remaining, makes full use of the energy；And certain electric power support can be given in peak times of power consumption.In small hydropower system scheduling
Aspect, has taken into full account the proactive mechanisms management of load, reference load is optimized, load spatial and temporal distributions is more beneficial for electricity
Stand scheduling.It is weak for regional power grid, the Optimized Operation for the small hydropower station being rich in again in the regional power grid of a large amount of small hydropower systems, both
The power supply of load can be effectively ensured, renewable resource can be effectively utilized again, energy-conserving and environment-protective reduce operating cost, produced well
Economic benefit and social benefit.Dispatching method is easy to grasp and operated, and beneficial reference is provided for dispatcher.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (4)
- The Optimization Scheduling 1. a kind of small hydropower system is incorporated into the power networks, it is characterised in that methods described includes：Predict and analyze the power producing characteristics of current region different type small power station；According to the historical data and the power producing characteristics of each small power station of the prediction and analysis, credible prediction and mathematical modeling are carried out, Show that the space-time power producing characteristics of the small power station, the mechanism of reciprocal effect, typical case are exerted oneself feature；Carry out regional reference load prediction；The different active control strategies of load are constituted using the different active control devices of load, the difference is passed sequentially through The active control strategy of load adjust load peak determined by the load prediction, complete load optimal；Carry out the independent control of voltage power-less；According to the power producing characteristics of the small power station, the result of the load prediction, by load optimal, with regional power grid running cost Minimum target is used, using power distribution network safe operating conditions as constraint, selection ant group algorithm, genetic algorithm or simulated annealing Solve, scheduling is optimized to whole small power stations and exerted oneself, the space-time for obtaining each small power station is exerted oneself result；Wherein, the power producing characteristics predicted and analyze current zone different type small power station, including：In pickup area power network The distributed data and categorical data of each small power station, determine small power station's machine set type and capacity, to water storage type small power station and radial-flow type Small power station carries out initial analysis, analyzes the influence factor and historical factor of small power station, gathers the precipitation character data of current region, Draw the power producing characteristics for each small hydropower station under all kinds of weather.
- 2. according to the method described in claim 1, it is characterised in that the described active control device of different loads includes： Electricity price is stimulated, enterprise moves peak, energy storage, and/or rack and reconstructed；Four kinds of active control devices of load are separate.
- 3. according to the method described in claim 1, it is characterised in that the independent control of the voltage power-less includes：Transformer point Joint is adjusted and power capacitor switching.
- 4. according to the method described in claim 1, it is characterised in that all kinds of weather include typhoon early warning weather.
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| CN106447134B (en) * | 2016-11-04 | 2019-10-15 | 贵州电网有限责任公司电力科学研究院 | A kind of small power station's classification short term power prediction technique |
| CN106485369B (en) * | 2016-11-04 | 2019-08-09 | 贵州电网有限责任公司电力科学研究院 | A kind of radial-flow type small power station short term power weight predicting method |
| CN106529718B (en) * | 2016-11-04 | 2019-11-05 | 贵州电网有限责任公司电力科学研究院 | A kind of non-radial-flow type small power station short term power weight predicting method |
| CN107093910B (en) * | 2017-05-09 | 2020-02-18 | 南京软核科技有限公司 | Multi-mode microgrid controller under new energy access containing small hydropower stations |
| CN107171322B (en) * | 2017-06-19 | 2020-04-14 | 国网重庆市电力公司电力科学研究院 | Planning method for power distribution network containing small hydropower stations |
| CN107769268B (en) * | 2017-10-10 | 2021-03-09 | 三峡大学 | Method for predicting provincial supply load day by day in regional dispatching range containing small hydropower stations |
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Address after: 570100 Hairuihou Road, Longhua District, Haikou City, Hainan Province, 23 Co-patentee after: Nanjing Soft Core Technology Co., Ltd. Patentee after: Hainan Electric Power Grid Co., Ltd. Electric Power Research Institute Address before: 571400 Xinheng Building, 123-8 Binhai Avenue, Haikou City, Hainan Province, 13 stories Co-patentee before: Nanjing Soft Core Technology Co., Ltd. Patentee before: Hainan Power Technology Research Institute |