CN104022521A - Renewable energy generating output power automatic stabilization control method and apparatus - Google Patents
Renewable energy generating output power automatic stabilization control method and apparatus Download PDFInfo
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Abstract
The invention provides a renewable energy generating output power automatic stabilization control method and apparatus. In the method, through a "variable load device" carried by a renewable energy power generation system, a special-purpose intelligent analysis controlling device detects and analyzes the change of power generation system output power and the change of an onsite environment in real time, a contrast is made with a preset generating output power (curve) value, and the electric power size of the variable load carried by the power generation system is automatically adjusted and controlled, such that fluctuations are inhibited, and the renewable energy power generation system is stabilized to output power according to the preset output power (curve) value, thus the purpose of consuming renewable energy to the maximum within a fluctuation scope allowed by a power network is realized.
Description
Technical field
The present invention relates to a kind of regenerative resource application, be specially renewable energy power generation power output automatic stabilisation control method and device.
Background technology
Along with national society's economic development, energy demand increases gradually, the environmental consciousness of society constantly increases, country has proposed energy-saving and emission-reduction, has readjusted the energy structure, adhere to the strategy of sustainable development, in national policy aspect, strengthen energetically regenerative resource exploitation and clean energy resource production, strengthen energetically the popularization of energy-conserving and emission-cutting technology.Electric energy is a kind of high-quality, clean secondary energy sources, and under prior art condition, the large-scale application of regenerative resource all needs to convert to electric energy ability.But all there is its intrinsic fluctuation and intermittence in the renewable energy power generation such as wind power generation, photovoltaic generation, itself and assurance electric power netting safe running must have the contradiction between higher stability, have greatly limited electrical network dissolving on a large scale to renewable energy power generation.Take wind-powered electricity generation as example, and by the experience of industrially developed country, the generate output that the ratio of wind power generation accounts for electrical network is generally no more than 8%-10%, but China is the wind-powered electricity generation of dissolving as far as possible, and it is 17% even higher that some electrical network has accounted for, reached the limit that electrical network can bear.However, still have every year and a large amount of abandon wind-powered electricity generation, still have a large amount of wind-powered electricity generation units to surf the Net, cause a large amount of inputs and resources of country can not bring into play due benefit.
Summary of the invention
Goal of the invention: the invention provides a kind of renewable energy power generation power output automatic stabilisation control method and device, its objective is the problem that solution regenerative resource is in the past unstable and source is wasted.
technical scheme: the present invention is achieved through the following technical solutions:
A kind of renewable energy power generation power output automatic stabilisation control method, it is characterized in that: the method detects by renewable energy power generation equipment power output trend detecting element electrical quantity signal and the electrical power tidal current signal that generating equipment is sent line, by power generation site environment weather tester, gathering power generation site wind speed can be also solar irradiation strength signal, and these signals are transferred to intellectual analysis control device by signal transmission device part.Intellectual analysis control device utilizes intellectual analysis control device that output power curve value and allowable fluctuation range can be set in advance, and detect in real time, calculate, analyze power and every electrical quantity that electricity generation system is exported, the variation tendency of judgement site environment meteorology, control this electricity generation system with the electric power size of variable load and the power output that renewable energy power generation is sent line, and then oscillation suppression control renewable energy system by the output power curve value stabilization ground power output of prior setting, variable load device is sent to corresponding operational order simultaneously and gather the electric power value of variable load device.
Renewable energy power generation equipment power output trend detecting element is transducer or detector; Site environment Climate measurement instrument is anemobiagraph and solarimeter.
Renewable energy power generation equipment is sent the electrical quantity signal of line and electrical power tidal current signal and is comprised that renewable energy power generation field or generating set send the signal of the output power value of line and output voltage values, all wave numbers, output current value, and power generation site environment weather signal is wind velocity signal or solar irradiation strength signal.
Gathering renewable energy power generation equipment sends in the electrical power tidal current signal of line and the process of power generation site ambient signal, electricity generation system output power curve value is first set, to wind generating field or wind generating set, by voltage sensor senses, its magnitude of voltage of sending line also detects the magnitude of voltage of its bus bar or current collection line, by current sensor, detect the current value that it sends line, also the performance number of detection power transmitter, utilizes the size of wind speed detector Test Field air speed value simultaneously and changes; To photovoltaic generation field or generating set, by voltage sensor senses, its magnitude of voltage of sending line also detects the magnitude of voltage of its bus bar or current collection line, by current sensor, detect the current value that it sends line, also the performance number of detection power transmitter, and while is by size and the variation of intensity of solar radiation tester Test Field intensity of solar radiation value.
Variable load device is by the closure of power switch, contactor, and classification, substep are controlled the size of its electric power; Or by power semiconductor device, control and change the size of its electric power.
Variable load device is by intellectual analysis control device, to be controlled and adopted the power device of the control method control of claim 5.
Variable load device is electrolytic aluminium device, sea water desalinating unit or electric heating energy-storage device
The meteorological trend judgement of site environment, wind power generation is pressed method of measurement and the computational methods continuous detecting of < < surface weather observation standard > > defined and calculated its on-the-spot mean wind speed and maximum wind velocity, and automatic decision goes out wind speed increase or the trend reducing and sends corresponding signal; Photovoltaic generation is pressed the method for measurement continuous detecting of < < surface weather observation standard > > defined and calculated its on-the-spot solar radiation value, and the increase of the sunny irradiance of automatic decision or the trend reducing are also sent corresponding signal.
When the field electricity generating device output power value that detects and calculate is greater than the fluctuation range of the output power curve value of prior setting, utilize intellectual analysis control device to variable load device, to send the instruction that adds heavy load; When the field electricity generating device output power value that detects and calculate is less than the fluctuation range of the output power curve value of prior setting, utilize intellectual analysis control device to variable load device, to send the instruction that reduces load; In power output allowable fluctuation range, environment weather trend judgement signal is that command signal is sent one of precondition judgement signal.
Implement the special-purpose renewable energy power generation power output automatic stabilisation control device of above-mentioned renewable energy power generation power output automatic stabilisation control method, it is characterized in that: this device comprises renewable energy power generation equipment power output trend detecting element, site environment tester, intellectual analysis control device and variable load device; Renewable energy power generation equipment power output trend detecting element, site environment Climate measurement instrument and variable load device are all connected to intellectual analysis control device, and intellectual analysis control device is element access electrical network after testing.
advantage and effect:
The invention provides a kind of by renewable energy system with " variable load device ", by special intelligent Analysis Control Unit, detect in real time, analyze the variation of electricity generation system power output and the variation of site environment, and with generating power output (curve) value be set in advance compare, automatically regulate, control this electricity generation system with the electric power size of variable load, and then oscillation suppression stablize renewable energy system by the method for power output (curve) the value power output of setting in advance.To reach the object of the maximized regenerative resource of dissolving in the fluctuation range allowing at electrical network.
accompanying drawing explanation:
Fig. 1 is the schematic block diagram of this invention; ,
Fig. 2 is wherein a kind of power of model wind turbine generator of the present invention.
embodiment:below in conjunction with accompanying drawing, the present invention will be further described:
As shown in Figure 1, the invention provides a kind of renewable energy power generation power output automatic stabilisation control method, the method detects by renewable energy power generation equipment power output trend detecting element electrical quantity signal and the electrical power tidal current signal that generating equipment is sent line, by power generation site environment weather tester, gathering power generation site wind speed can be also solar irradiation strength signal, and these signals are transferred to intellectual analysis control device by signal transmission device part.Intellectual analysis control device utilizes intellectual analysis control device that output power curve value and allowable fluctuation range can be set in advance, and detect in real time, calculate, analyze power and every electrical quantity that electricity generation system is exported, the variation tendency of judgement site environment meteorology, control this electricity generation system with the electric power size of variable load and the power output that renewable energy power generation is sent line, and then oscillation suppression control renewable energy system by the output power curve value stabilization ground power output of prior setting, variable load device is sent to corresponding operational order simultaneously and gather the electric power value of variable load device.
Renewable energy power generation equipment power output trend detecting element is transducer or detector; Site environment Climate measurement instrument is anemobiagraph and solarimeter.
Renewable energy power generation equipment is sent the electrical quantity signal of line and electrical power tidal current signal and is comprised that renewable energy power generation field or generating set send the signal of the output power value of line and output voltage values, all wave numbers, output current value, and power generation site environment weather signal is wind velocity signal or solar irradiation strength signal.
Gathering renewable energy power generation equipment sends in the electrical power tidal current signal of line and the process of power generation site ambient signal, electricity generation system output power curve value is first set, to wind generating field or wind generating set, by voltage sensor senses, its magnitude of voltage of sending line also detects the magnitude of voltage of its bus bar or current collection line, by current sensor, detect the current value that it sends line, also the performance number of detection power transmitter, utilizes the size of wind speed detector Test Field air speed value simultaneously and changes; To photovoltaic generation field or generating set, by voltage sensor senses, its magnitude of voltage of sending line also detects the magnitude of voltage of its bus bar or current collection line, by current sensor, detect the current value that it sends line, also the performance number of detection power transmitter, and while is by size and the variation of intensity of solar radiation tester Test Field intensity of solar radiation value.
Variable load device is by the closure of power switch, contactor, and classification, substep are controlled the size of its electric power; Or by power semiconductor device, control and change the size of its electric power.
Variable load device is by intellectual analysis control device, to be controlled and adopted the power device of the control method control of claim 5.
Variable load device is electrolytic aluminium device, sea water desalinating unit or electric heating energy-storage device
The meteorological trend judgement of site environment, wind power generation is pressed method of measurement and the computational methods continuous detecting of < < surface weather observation standard > > defined and calculated its on-the-spot mean wind speed and maximum wind velocity, and automatic decision goes out wind speed increase or the trend reducing and sends corresponding signal; Photovoltaic generation is pressed the method for measurement continuous detecting of < < surface weather observation standard > > defined and calculated its on-the-spot solar radiation value, and the increase of the sunny irradiance of automatic decision or the trend reducing are also sent corresponding signal.
When the field electricity generating device output power value that detects and calculate is greater than the fluctuation range of the output power curve value of prior setting, utilize intellectual analysis control device to variable load device, to send the instruction that adds heavy load; When the field electricity generating device output power value that detects and calculate is less than the fluctuation range of the output power curve value of prior setting, utilize intellectual analysis control device to variable load device, to send the instruction that reduces load; In power output allowable fluctuation range, environment weather trend judgement signal is that command signal is sent one of precondition judgement signal.
Implement the special-purpose renewable energy power generation power output automatic stabilisation control device of above-mentioned renewable energy power generation power output automatic stabilisation control method, it is characterized in that: this device comprises renewable energy power generation equipment power output trend detecting element, site environment tester, intellectual analysis control device and variable load device; Renewable energy power generation equipment power output trend detecting element, site environment Climate measurement instrument and variable load device are all connected to intellectual analysis control device, and intellectual analysis control device is element access electrical network after testing.
1, the fluctuation of renewable energy system
Wind energy, luminous energy are all a kind of natural resourcess, thereby the size of its wind speed is, the power at sunshine
Affected by the factor of natural environment such as geographical position, geographical conditions, Changes in weather, variation round the clock.Adopt the generating equipment of wind power generation and optical energy power, the size that its equipment is exerted oneself be also subject to the impact of natural environment and restriction and present periodically, fluctuation and intermittent feature.
Take wind power generation as example: because being subject to the impact of natural environment, wind-driven generator exert oneself be unsettled, there is fluctuation, Fig. 2 is a kind of power curve of model wind turbine generator:
From curve chart, can find out, its incision wind speed is that 4 meters, rated wind speed are 15, excision wind speed is 25 meters, as we can see from the figure, its generated output can increase along with the enhancing of wind speed, just reach after rated wind speed and no longer increase or along with wind speed strengthens and declines to some extent, curve chart is presented in the scope of wind speed 4-25 rice, and the electrical power of its output can become the significantly variation of tens times at tens kilowatts along with the variation of wind speed in the scope of hundreds of kilowatt.
The stability requirement generating set power output of operation of power networks and bearing power must keep a kind of dynamic balance, the wind-powered electricity generation of dissolving if as much as possible, with regard to require its load-carrying electric power not only want to change and to change along with the power of wind-powered electricity generation unit, and the two also will match as much as possible, but the load of electrical network can not change along with the variation of wind power.Therefore, wind-powered electricity generation set grid-connection a large amount of, infinity, fluctuation will cause the fluctuation of electrical network, and electrical network cannot be born, more have a strong impact on electrical network with the normal use of power consumption equipment.So national departments concerned has all been done strict regulation to the fluctuation range of public electric wire net and grid connected wind power.So wind-powered electricity generation, this intrinsic fluctuation of photovoltaic electric, seriously restricted regenerative resource in wider application.
If but can find a kind of method, under equal conditions, in electrical network official hour section, each field, renewable energy power generation field or generating set are reduced to the words of half to the fluctuating range of public electric wire net power output, within the scope of the power network fluctuation of national regulation, increase wind energy turbine set that just can be at double or the online capacity of wind-powered electricity generation unit, just can allow whole country and society use more clean energy resource and regenerative resource.
2, scheme principle
The renewable energy power generation equipment power output ASCS consisting of variable load device is by variable load device, renewable energy power generation equipment power output trend detecting element (or transducer, detector), site environment (wind speed or luminous intensity) tester, the common system forming of corresponding signal transmission device part and special-purpose special intelligent Analysis Control Unit.
Wind power generation take below as example, its operation principle be described:
Fig. 1 is one the " renewable energy power generation consisting of variable load device is installed
Equipment power output ASCS " wind energy turbine set schematic diagram.
We know that wind farm grid-connected is mainly the power fluctuation by wind energy turbine set on the impact of electrical network
Causing, is the effective ways that solve wind energy turbine set access scale so suppress the random fluctuation of Power Output for Wind Power Field.
Regulate " variable load device " electric power size major control signal be that wind energy turbine set can be also between wind turbine generator and electrical network, to send the electrical power tidal current signal of line, special intelligent control device is by detecting the size of this signal, direction and voltage, cycle, the signals such as electric current, and the parameter such as on-the-spot wind speed, contrast with generating power output (curve) value of prior setting, analyze, the size of judgement variable load device electric power, and variable load device is sent to corresponding adjustment operation instruction, gather the performance number of variable load device reality simultaneously.Control device adopts electronic technology, and its system response time calculates with millisecond.Although the wind speed of wind energy turbine set changes very fast, but wind-powered electricity generation unit is comparatively mild and limited in the amplitude of variation in time in seconds, wind turbine generator is a mechanical system generally simultaneously, in response speed, also cannot compare with electronic system speed.Therefore, wind energy turbine set with variable load device, when the fluctuation of wind-powered electricity generation unit emergent power or variation, can be in very short time inner equilibrium wind energy turbine set the fluctuation electrical power of the overwhelming majority, the fluctuating power forming because of power adjustments response lag between wind energy turbine set and electrical network also can be very little, so also can be very little on the impact of electrical network.
Variable load device is as the load of wind energy turbine set, the size of its electric power, be subject to wind energy turbine set to send the power output of line and the control of power output (curve) value that arranges in advance changing with the variation of its reduced value, the external power output of load side stable electric generation from electricity generation system, these stable technical conditions that provide that are maximized assurance electrical network, can, in electrical network can fluctuation range that allow, identical, reach the object of the wind-powered electricity generation of dissolving substantially.
3, variable load device
Variable load device is the important part of renewable energy power generation power output ASCS.The principle of variable load device work is according to the instruction of special intelligent analyzer-controller, by the closure of the switching devices such as power switch, A.C. contactor, classification, step by step, minute gradient controls the size of its electric power; Also can, by controlling as the angle of flow of the power semiconductor devices such as thyristor, duty ratio etc., control and change the size of its electric power.
Much power consumption equipment high-power, highly energy-consuming can adopt said method to be become the load device of power variable.As electrolytic aluminium device, according to relevant expert, study, in the production process of electrolytic aluminium, the size of electrical power and changing the quality of electrolytic aluminium product without any impact, the equipment such as sea water desalinating unit and electric heating energy-storage device are also same reasons, as long as design the device parameters such as electrical power excursion, on the use of equipment without any impact.
A renewable energy system can be with one or more variable load device, by same special intelligent control device in this electricity generation system, is controlled.During actual use, should consider its requirement etc. of the generating field of controlling or the capacity of installed generator of generating set and the size of fluctuating range, control precision, match well the maximum electric power of variable load, and the parameter such as the adjusting range of power, cadence and gradient.
4, special intelligent control device
Special intelligent Analysis Control Unit is comprised of the respective sensor (or detector), wind speed tester, signal transmission component, computer and the special-purpose software that detect the electromotive power output trend of generating field or generating set, and generating power output (curve) value can be set in advance.Take wind-powered electricity generation as example: by detecting the electrical power tidal current signal of sending line between wind energy turbine set and electrical network, as wind energy turbine set bus bar magnitude of voltage, all wave numbers, send the signals (can be also the signal of corresponding power transmitter) such as line current value and direction, the special-purpose software of installing in machine is as calculated analyzed, is calculated, and compare with power (curve) value of prior setting, simultaneously after the analysis of the wind farm wind velocity signal to Real-time Collection, situation of change and the variable quantity of judgement electrical power trend, and variable load device is sent to corresponding operational order.Transfer of data can adopt wired mode, also can adopt wireless mode.
In actual installation when application,, because distinguishing to some extent as the case may be, flexible Application.As while controlling wind generating field or wind generating set, should pass through magnitude of voltage, all wave numbers of its bus bar of voltage sensor senses (current collection line), by current sensor, detecting it, to send line current value can be also the current value at step-up transformer high-low pressure two ends, simultaneously by the size of wind speed detector Test Field air speed value and change; When photovoltaic generation field or generating set are controlled, should be by voltage sensor senses its magnitude of voltage of sending line also can detect the magnitude of voltage of its bus bar (or current collection line), by current sensor, detect the current value that it sends line, and the while is by size and the variation of luminous intensity tester Test Field illumination intensity value.
5, this programme feature
Existing renewable energy system is not needed to do larger adjustment; The cost of realizing
Lower, many large power-consuming equipments all can be realized variable load through transformation; By adopting a kind of straightforward procedure of mature technology to solve the problem of renewable energy source power difficulty.
Claims (10)
1. a renewable energy power generation power output automatic stabilisation control method, it is characterized in that: the method detects by renewable energy power generation equipment power output trend detecting element electrical quantity signal and the electrical power tidal current signal that generating equipment is sent line, by power generation site environment weather tester, gathering power generation site wind speed can be also solar irradiation strength signal, and these signals are transferred to intellectual analysis control device by signal transmission device part.
2. intellectual analysis control device utilizes intellectual analysis control device that output power curve value and allowable fluctuation range can be set in advance, and detect in real time, calculate, analyze power and every electrical quantity that electricity generation system is exported, the variation tendency of judgement site environment meteorology, control this electricity generation system with the electric power size of variable load and the power output that renewable energy power generation is sent line, and then oscillation suppression control renewable energy system by the output power curve value stabilization ground power output of prior setting, variable load device is sent to corresponding operational order simultaneously and gather the electric power value of variable load device.
3. renewable energy power generation power output automatic stabilisation control method according to claim 1, is characterized in that: renewable energy power generation equipment power output trend detecting element is transducer or detector; Site environment Climate measurement instrument is anemobiagraph and solarimeter.
4. renewable energy power generation power output automatic stabilisation control method according to claim 1, it is characterized in that: renewable energy power generation equipment is sent the electrical quantity signal of line and electrical power tidal current signal and comprised that renewable energy power generation field or generating set send the signal of the output power value of line and output voltage values, all wave numbers, output current value, and power generation site environment weather signal is wind velocity signal or solar irradiation strength signal.
5. renewable energy power generation power output automatic stabilisation control method according to claim 1, it is characterized in that: gather renewable energy power generation equipment and send in the electrical power tidal current signal of line and the process of power generation site ambient signal, electricity generation system output power curve value is first set, to wind generating field or wind generating set, by voltage sensor senses, its magnitude of voltage of sending line also detects the magnitude of voltage of its bus bar or current collection line, by current sensor, detect the current value that it sends line, also the performance number of detection power transmitter, utilize the size of wind speed detector Test Field air speed value simultaneously and change, to photovoltaic generation field or generating set, by voltage sensor senses, its magnitude of voltage of sending line also detects the magnitude of voltage of its bus bar or current collection line, by current sensor, detect the current value that it sends line, also the performance number of detection power transmitter, and while is by size and the variation of intensity of solar radiation tester Test Field intensity of solar radiation value.
6. renewable energy power generation power output automatic stabilisation control method according to claim 1, is characterized in that: variable load device is by the closure of power switch, contactor, and classification, substep are controlled the size of its electric power; Or by power semiconductor device, control and change the size of its electric power.
7. renewable energy power generation power output automatic stabilisation control method according to claim 5, is characterized in that: variable load device is by intellectual analysis control device, to be controlled and adopted the power device of the control method control of claim 5.
8. renewable energy power generation power output automatic stabilisation control method according to claim 6, is characterized in that: variable load device is electrolytic aluminium device, sea water desalinating unit or electric heating energy-storage device
Renewable energy power generation power output automatic stabilisation control method according to claim 1, it is characterized in that: the meteorological trend judgement of site environment, wind power generation is pressed method of measurement and the computational methods continuous detecting of < < surface weather observation standard > > defined and calculated its on-the-spot mean wind speed and maximum wind velocity, and automatic decision goes out wind speed increase or the trend reducing and sends corresponding signal; Photovoltaic generation is pressed the method for measurement continuous detecting of < < surface weather observation standard > > defined and calculated its on-the-spot solar radiation value, and the increase of the sunny irradiance of automatic decision or the trend reducing are also sent corresponding signal.
9. renewable energy power generation power output automatic stabilisation control method according to claim 1, it is characterized in that: when the field electricity generating device output power value that detects and calculate is greater than the fluctuation range of the output power curve value of prior setting, utilize intellectual analysis control device to variable load device, to send the instruction that adds heavy load; When the field electricity generating device output power value that detects and calculate is less than the fluctuation range of the output power curve value of prior setting, utilize intellectual analysis control device to variable load device, to send the instruction that reduces load; In power output allowable fluctuation range, environment weather trend judgement signal is that command signal is sent one of precondition judgement signal.
10. implement the claims the special-purpose renewable energy power generation power output automatic stabilisation control device of renewable energy power generation power output automatic stabilisation control method described in 1, it is characterized in that: this device comprises renewable energy power generation equipment power output trend detecting element, site environment tester, intellectual analysis control device and variable load device; Renewable energy power generation equipment power output trend detecting element, site environment Climate measurement instrument and variable load device are all connected to intellectual analysis control device, and intellectual analysis control device is element access electrical network after testing.
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