CN109873453A - A method of improving wind generator system security and stability - Google Patents
A method of improving wind generator system security and stability Download PDFInfo
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- CN109873453A CN109873453A CN201910321646.2A CN201910321646A CN109873453A CN 109873453 A CN109873453 A CN 109873453A CN 201910321646 A CN201910321646 A CN 201910321646A CN 109873453 A CN109873453 A CN 109873453A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The invention discloses a kind of methods for improving wind generator system security and stability, belong to wind generator system field, the following steps are included: S1: measuring and assess to wind energy resources, S2: building wind generator system, the unit that selection matches with surveyed wind energy resources in S1, select suitable landform, S3: idle work optimization is carried out to wind generator system, S4: suitable Reactive Compensation in Wind Farm mode is selected, S5: building energy storage station, S6: trial operation wind generator system, S7: commencement of commercial operation wind generator system.The method of raising wind generator system security and stability of the invention is largely reconnoitred before constructing wind generator system, more excellent Reactive Compensation Mode is selected according to actual needs, simultaneously, the large-scale energy storage station that links carrys out accumulation of energy and selects suitable energy storage mode, it is influenced to solve the unstability of wind to wind generator system bring, improves the stability of wind generator system.
Description
Technical field
The present invention relates to wind generator system technical field, specially a kind of raising wind generator system security and stability
Method.
Background technique
Wind-power electricity generation refers to that the kinetic energy kept watch switchs to electric energy.Wind energy is a kind of to clean non-harmful renewable energy energy
Source is utilized by people very early, is mainly drawn water by windmill, flour milling etc., and present, and interested people are how to utilize
Wind generates electricity.
Wind is one of the energy of not public hazards.And it is inexhaustible.For water shortage, short bunker and traffic
Inconvenient offshore islands, Pastoral Areas, mountain area and plateau band utilizes wind-power electricity generation to adaptation to local conditions, is very suitable to, having greatly can
For.Offshore wind farm is the key areas of Renewable Energy Development, is the important force for pushing wind power technology progress and industrial upgrading,
It is the important measures for promoting Energy restructuring.China's offshore wind energy resource is abundant, accelerates offshore wind farm project construction, for promoting
Into coastal area improvement atmospheric haze, readjusting the energy structure is of great significance with Economic Development Mode Conversion.
But there are some defects for existing wind generator system, firstly, its prospecting before building is not enough, in structure
Security risk is easy to produce after building, secondly, the unstability of wind be easy to cause the unstable of wind generator system, and existing wind
Force generating system does not select more excellent Reactive Compensation Mode according to actual needs, meanwhile, also without the large-scale energy storage that links
It stands and carrys out accumulation of energy and select suitable energy storage mode.
Summary of the invention
The purpose of the present invention is to provide a kind of methods for improving wind generator system security and stability, to solve above-mentioned back
The problem of being proposed in scape technology.
To achieve the above object, the invention provides the following technical scheme: a kind of raising wind generator system security and stability
Method, comprising the following steps:
S1: wind energy resources are measured and are assessed, comprising the following steps:
A: anemometer tower is set up in the position that selection can represent Characteristics of Wind Field；
B: the accurate direction of confirmation anemometer positioning；
C: confirmation prepares the correlation between the wind speed, wind direction and main anemometer tower in cloth machine area；
D: correctness of the confirmation with reference to weather station wind speed, wind direction；
F: wind data is surveyed in confirmation can satisfy the requirement of microcosmic structure software；
S2: building wind generator system, the unit that selection matches with surveyed wind energy resources in S1, selection is suitably
Shape；
S3: to wind generator system idle work optimization, there are two types of the approach of idle work optimization, as follows:
First is that the optimization planning of reactive power compensator；
Second is that effective control of voltage and reactive power optimization；
S4: suitable Reactive Compensation in Wind Farm mode is selected；
S5: building energy storage station, by itself and wind generator system combined operating；
S6: wind generator system trial operation checks operation conditions, and for statistical analysis to operation data；
S7: after confirmation is errorless, commencement of commercial operation wind generator system.
Preferably, wind energy resources are measured seven times in the S1, seven groups of measurement results is removed into highest and minimum
Data take the average value of remaining five groups of data, to assess wind energy resources.
Preferably, the unit selected in the S2 is suitble to wind power plant resource characteristics.
Preferably, the optimization planning of reactive power compensator refers to reasonable selection compensation device in the S3, reduces power grid
Grid loss improves the output power quality of power grid, by the idle of capacitor direct compensation load generation, to guarantee power grid
The stability of voltage and power；Effective control of voltage and reactive power optimization: voltage is an important indicator for measuring power quality, matter
The qualified voltage of amount should deviate, voltage fluctuation and flashing, and the mains by harmonics and asymmetrical three-phase of four aspects can satisfy country
Requirement in relation to standard, allowing reasonable reactive power source configuration is the key that guarantee voltage reasonable.
Preferably, wind power plant Reactive Compensation Mode is divided into three kinds in the S4: capacitor grouping is compensated, is based on automatically
The dynamic passive compensation of SVG and the static reactive power compensation based on SVC.
Preferably, the energy storage mode of energy storage station mainly has three kinds of flow battery, lithium battery, supercapacitor shapes in the S5
Formula.
Preferably, the ferrous phosphate lithium battery in the lithium battery is bigger than the volume of other materials, at low cost, is suitble to big
Type energy-storage system.
Preferably, regular check Wind turbines when wind generator system trial operation in the S6 record Wind turbines in spy
Operation conditions under different weather conditions.
Compared with prior art, the beneficial effects of the present invention are: largely being reconnoitred before constructing wind generator system, root
More excellent Reactive Compensation Mode is selected according to actual demand, meanwhile, the large-scale energy storage station that links carrys out accumulation of energy and selects suitable storage
Energy mode improves the stability of wind generator system so that solve the unstability of wind influences to wind generator system bring.
Detailed description of the invention
Fig. 1 is flow diagram of the invention；
Fig. 2 measures and estimation flow schematic diagram wind energy resources to be of the invention；
Fig. 3 is the approach schematic diagram of idle work optimization of the invention；
Fig. 4 is Reactive Compensation Mode schematic diagram of the invention.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Please refer to Fig. 1-4
Embodiment one
The present invention provides a kind of technical solution: a method of wind generator system security and stability being improved, including following
Step:
S1: wind energy resources are measured and are assessed, comprising the following steps:
A: anemometer tower is set up in the position that selection can represent Characteristics of Wind Field；
B: the accurate direction of confirmation anemometer positioning；
C: confirmation prepares the correlation between the wind speed, wind direction and main anemometer tower in cloth machine area；
D: correctness of the confirmation with reference to weather station wind speed, wind direction；
F: wind data is surveyed in confirmation can satisfy the requirement of microcosmic structure software；
Wind energy resources are measured seven times, seven groups of measurement results are removed into highest and minimum data, are taken five groups remaining
The average value of data, to assess wind energy resources；
S2: building wind generator system, the unit that selection matches with surveyed wind energy resources in S1, selection is suitably
The unit of shape, selection is suitble to wind power plant resource characteristics；
S3: to wind generator system idle work optimization, there are two types of the approach of idle work optimization, as follows:
First is that the optimization planning of reactive power compensator；
Second is that effective control of voltage and reactive power optimization；
The optimization planning of reactive power compensator refers to reasonable selection compensation device, reduces the grid loss of power grid, improves electricity
The output power quality of net, by capacitor direct compensation load generate it is idle, with guarantee power grid voltage and power it is steady
It is qualitative；Effective control of voltage and reactive power optimization: voltage is an important indicator for measuring power quality, and up-to-standard voltage is answered
Offset, voltage fluctuation and flashing, the mains by harmonics and asymmetrical three-phase of four aspects, can satisfy wanting for relative national standards
It asks, allowing reasonable reactive power source configuration is the key that guarantee voltage reasonable；
S4: the automatic reactive compensation compensated to Reactive Compensation in Wind Farm, in wind generator system of selection capacitor grouping
It is mainly adjusted by the static capacitors group to concentration, fixed capacity, completes the work of capacitor whole group switching, but wind-force
The main reason of power factor and voltage change is the fluctuation of system loading in electricity generation system, and fixed capacitor group can not basis
The variation of the reactive requirement of real system, power factor and system voltage at any time adjusts the reactive compensation capacity of electric system
Whole, this automatic compensation way is easy to operate, and operating cost is low, and maintenance is more convenient, but not to the voltage fluctuation of wind power plant
It can be carried out timely adjustment, while having higher requirements to capacitor grouping, fling-cut switch is to electronic original part performance requirement ratio thereon
It is higher；
S5: the energy storage mode of itself and wind generator system combined operating, energy storage station is selected flow battery by building energy storage station
Form, flow battery or oxidation, reduction liquid accumulating system are inclusive in solid-state anode with the active material of usual battery
Or it is different within cathode, the active material of flow battery exists in liquid form, is both electrode active material and electrolyte is molten
Liquid, it is dissolvable in water in the solution for being divided in two big fluid reservoirs, so that solution is flowed through flow battery by each pump, in amberplex
Reduction and oxidation reaction, this battery occurs on the electrode of two sides respectively does not have solid-state reaction, and electrode substance structure shape does not occur
The change of state has apparent advantage compared with other conventional batteries, and the stored energy capacitance of flow battery holds depending on electrolyte
Amount and density, quite flexible, which need to only increase electrolyte volume and concentration, in configuration can increase stored energy capacitance, and can carry out
Depth charge and discharge；
S6: wind generator system trial operation checks operation conditions, and, wind for statistical analysis to operation data
Regular check Wind turbines when force generating system trial operation record operation conditions of Wind turbines under the conditions of special climate；
S7: after confirmation is errorless, commencement of commercial operation wind generator system.
Please refer to Fig. 1-4
Embodiment two
The present invention provides a kind of technical solution: a method of wind generator system security and stability being improved, including following
Step:
S1: wind energy resources are measured and are assessed, comprising the following steps:
A: anemometer tower is set up in the position that selection can represent Characteristics of Wind Field；
B: the accurate direction of confirmation anemometer positioning；
C: confirmation prepares the correlation between the wind speed, wind direction and main anemometer tower in cloth machine area；
D: correctness of the confirmation with reference to weather station wind speed, wind direction；
F: wind data is surveyed in confirmation can satisfy the requirement of microcosmic structure software；
Wind energy resources are measured seven times, seven groups of measurement results are removed into highest and minimum data, are taken five groups remaining
The average value of data, to assess wind energy resources；
S2: building wind generator system, the unit that selection matches with surveyed wind energy resources in S1, selection is suitably
The unit of shape, selection is suitble to wind power plant resource characteristics；
S3: to wind generator system idle work optimization, there are two types of the approach of idle work optimization, as follows:
First is that the optimization planning of reactive power compensator；
Second is that effective control of voltage and reactive power optimization；
The optimization planning of reactive power compensator refers to reasonable selection compensation device, reduces the grid loss of power grid, improves electricity
The output power quality of net, by capacitor direct compensation load generate it is idle, with guarantee power grid voltage and power it is steady
It is qualitative；Effective control of voltage and reactive power optimization: voltage is an important indicator for measuring power quality, and up-to-standard voltage is answered
Offset, voltage fluctuation and flashing, the mains by harmonics and asymmetrical three-phase of four aspects, can satisfy wanting for relative national standards
It asks, allowing reasonable reactive power source configuration is the key that guarantee voltage reasonable；
S4: dynamic passive compensation of the selection based on SVG will by transformer or reactor to Reactive Compensation in Wind Farm, SVG
It is connected in parallel on power grid from commutation bridge circuit, the phase and amplitude of the output voltage of bridge circuit exchange side can be adjusted at any time,
Directly by the electric current of control exchange side, circuit device is enabled to absorb or issue the reactive current met the requirements, realized dynamic
State reactive compensation, this mode compensation process be by the ac voltage rectifier of system direct current and be saved in DC capacitor, then
By inverter, by this DC voltage, inversion is required alternating voltage again, is connected finally by reactor with power grid,
Using in characteristic, this mode may be implemented accurately to compensate to dynamic reactive reacting condition fast speed, realize real-time response.
Meanwhile this employing mode compensation output current harmonics content is small, is not required to additional filter, avoids system resonance, low pressure property is good,
It is the currently the only compensation way with low voltage ride-through function；
S5: the energy storage mode of itself and wind generator system combined operating, energy storage station is selected ferrous phosphate by building energy storage station
The unit price of lithium battery form, ferrousphosphate lithium material is not high, and cost is minimum, and right in several battery materials
Environmental nonpollution, and ferrous phosphate lithium battery is bigger than the volume of other materials, it is at low cost, it is suitble to large size energy-storage system；
S6: wind generator system trial operation checks operation conditions, and, wind for statistical analysis to operation data
Regular check Wind turbines when force generating system trial operation record operation conditions of Wind turbines under the conditions of special climate；
S7: after confirmation is errorless, commencement of commercial operation wind generator system.
Please refer to Fig. 1-4
Embodiment three
The present invention provides a kind of technical solution: a method of wind generator system security and stability being improved, including following
Step:
S1: wind energy resources are measured and are assessed, comprising the following steps:
A: anemometer tower is set up in the position that selection can represent Characteristics of Wind Field；
B: the accurate direction of confirmation anemometer positioning；
C: confirmation prepares the correlation between the wind speed, wind direction and main anemometer tower in cloth machine area；
D: correctness of the confirmation with reference to weather station wind speed, wind direction；
F: wind data is surveyed in confirmation can satisfy the requirement of microcosmic structure software；
Wind energy resources are measured seven times, seven groups of measurement results are removed into highest and minimum data, are taken five groups remaining
The average value of data, to assess wind energy resources；
S2: building wind generator system, the unit that selection matches with surveyed wind energy resources in S1, selection is suitably
The unit of shape, selection is suitble to wind power plant resource characteristics；
S3: to wind generator system idle work optimization, there are two types of the approach of idle work optimization, as follows:
First is that the optimization planning of reactive power compensator；
Second is that effective control of voltage and reactive power optimization；
The optimization planning of reactive power compensator refers to reasonable selection compensation device, reduces the grid loss of power grid, improves electricity
The output power quality of net, by capacitor direct compensation load generate it is idle, with guarantee power grid voltage and power it is steady
It is qualitative；Effective control of voltage and reactive power optimization: voltage is an important indicator for measuring power quality, and up-to-standard voltage is answered
Offset, voltage fluctuation and flashing, the mains by harmonics and asymmetrical three-phase of four aspects, can satisfy wanting for relative national standards
It asks, allowing reasonable reactive power source configuration is the key that guarantee voltage reasonable；
S4: to Reactive Compensation in Wind Farm, Static Var Compensator refers to quick static reactive power compensation of the selection based on SVC
The electronic switch (such as thyristor) of movement replaces mechanical switch, is mainly used for adjusting the device of reactive power, device is without machinery
Transmission parts have the function of phase modifier, are a kind of quick, smooth, controllable reactive power compensation devices, with power electronics
The development of technology, phase control techniques, pulse width modulating technology increasingly progressive for the dynamic control of harmonic wave and reactive power device
And four-quadrant alternating-current technique has also obtained preferable development, above situation is provides centainly using Static VAR Compensation
External condition, this compensation method no matter in theoretical calculation and practical application it is ideal, compensation effect is good, reaction
Speed is fast, but the disadvantage that there is also output harmonic waves is big, fundamental wave loss is high, occupied area is wide；
S5: the energy storage mode of itself and wind generator system combined operating, energy storage station is selected super capacitor by building energy storage station
Device form, supercapacitor can be described as capacitor with super capacity, double layer capacitor, (Huang) gold capacitor, storage capacitor or method again
Draw capacitor, chemical cell is to generate faraday's electric charge transfer to store charge by electrochemical reaction, and supercapacitor
Charge storage occur electrode electrolyte formation electric double layer on and electrode surface carry out underpotential deposition, electrochemistry
The migration for the charge that adsorption and desorption and redox generate, compared with traditional capacitor and secondary cell, supercapacitor
Specific power is 10 times of battery or more, and the ability for storing charge is higher than ordinary capacitor, and have charge/discharge speed it is fast, to environment
Temperature that is pollution-free, having extended cycle life, use limits the features such as range is wide, is incorporated to super capacitor in wind generator system DC bus side
Device can not only store energy as battery, and energy fluctuation caused by stabilizing due to wind-force fluctuation, can also play adjusting has
The effect that function is idle, but costly due to supercapacitor, it is chiefly used in the short time in the power system, powerful load is put down
Sliding and power quality is adjusted, such as the starting of high power DC electric machine supports dynamic electric voltage to restore, dry in Voltage Drop and transient state
Power supply level is improved when disturbing；
S6: wind generator system trial operation checks operation conditions, and, wind for statistical analysis to operation data
Regular check Wind turbines when force generating system trial operation record operation conditions of Wind turbines under the conditions of special climate；
S7: after confirmation is errorless, commencement of commercial operation wind generator system.
By the way that above-mentioned three groups of embodiments are compared, it can be deduced that wind generator system can be improved in three groups of embodiments
Stability, wherein the effect and cost of embodiment two are more excellent, and the present invention is largely surveyed before constructing wind generator system
It examines, selects more excellent Reactive Compensation Mode according to actual needs, meanwhile, the large-scale energy storage station that links carrys out accumulation of energy and selects properly
Energy storage mode, thus solve wind unstability give wind generator system bring influence, improve the steady of wind generator system
It is qualitative.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of method for improving wind generator system security and stability, which comprises the following steps:
S1: wind energy resources are measured and are assessed, comprising the following steps:
A: anemometer tower is set up in the position that selection can represent Characteristics of Wind Field；
B: the accurate direction of confirmation anemometer positioning；
C: confirmation prepares the correlation between the wind speed, wind direction and main anemometer tower in cloth machine area；
D: correctness of the confirmation with reference to weather station wind speed, wind direction；
F: wind data is surveyed in confirmation can satisfy the requirement of microcosmic structure software；
S2: building wind generator system, the unit that selection matches with surveyed wind energy resources in S1 select suitable landform；
S3: to wind generator system idle work optimization, there are two types of the approach of idle work optimization, as follows:
First is that the optimization planning of reactive power compensator；
Second is that effective control of voltage and reactive power optimization；
S4: suitable Reactive Compensation in Wind Farm mode is selected；
S5: building energy storage station, by itself and wind generator system combined operating；
S6: wind generator system trial operation checks operation conditions, and for statistical analysis to operation data；
S7: after confirmation is errorless, commencement of commercial operation wind generator system.
2. a kind of method for improving wind generator system security and stability according to claim 1, it is characterised in that: described
Wind energy resources are measured seven times in S1, seven groups of measurement results are removed into highest and minimum data, take remaining five groups of data
Average value, to assess wind energy resources.
3. a kind of method for improving wind generator system security and stability according to claim 1, it is characterised in that: described
The unit selected in S2 is suitble to wind power plant resource characteristics.
4. a kind of method for improving wind generator system security and stability according to claim 1, it is characterised in that: described
The optimization planning of reactive power compensator refers to reasonable selection compensation device in S3, reduces the grid loss of power grid, improves power grid
Power quality is exported, by the idle of capacitor direct compensation load generation, to guarantee the voltage of power grid and the stability of power；
Effective control of voltage and reactive power optimization: voltage is an important indicator for measuring power quality, and up-to-standard voltage should deviate,
Voltage fluctuation and flashing, the mains by harmonics and asymmetrical three-phase of four aspects, can satisfy the requirement of relative national standards, allow
Reasonable reactive power source configuration is the key that guarantee voltage reasonable.
5. a kind of method for improving wind generator system security and stability according to claim 1, it is characterised in that: described
Wind power plant Reactive Compensation Mode is divided into three kinds in S4: capacitor grouping it is automatic compensate, dynamic passive compensation and base based on SVG
In the static reactive power compensation of SVC.
6. a kind of method for improving wind generator system security and stability according to claim 1, it is characterised in that: described
The energy storage mode of energy storage station mainly has three kinds of flow battery, lithium battery, supercapacitor forms in S5.
7. a kind of method for improving wind generator system security and stability according to claim 6, it is characterised in that: described
Ferrous phosphate lithium battery in lithium battery is bigger than the volume of other materials, at low cost, is suitble to large size energy-storage system.
8. a kind of method for improving wind generator system security and stability according to claim 1, it is characterised in that: described
Regular check Wind turbines when wind generator system trial operation in S6 record operation shape of Wind turbines under the conditions of special climate
Condition.
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| CN102377189A (en) * | 2011-11-28 | 2012-03-14 | 山东电力集团公司潍坊供电公司 | Optimal configuration and operation method for reactive compensation of wind farm |
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