CN103812137B - A kind of control method to generating set and device - Google Patents
A kind of control method to generating set and device Download PDFInfo
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- CN103812137B CN103812137B CN201210459135.5A CN201210459135A CN103812137B CN 103812137 B CN103812137 B CN 103812137B CN 201210459135 A CN201210459135 A CN 201210459135A CN 103812137 B CN103812137 B CN 103812137B
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Abstract
This application discloses a kind of control method to generating set, for in electricity generation system, described electricity generation system comprises for generation of the generating set of exerting oneself, for controlling the gen-set control system of generating set, and the energy-storage system for coordinating generating set to run; The state coordinating generating set to run is in when described energy-storage system is current, and running status normal time, described method is mainly gen-set control system and judges that can the available regulating power of exerting oneself of described energy-storage system make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set, if so, the governing speed of exerting oneself of generating set is then reduced; Otherwise, improve the governing speed of exerting oneself of generating set.Application the application, effectively make use of generating set and energy-storage system advantage, reduces generating set loss and wearing and tearing, ensure that the object of power dispatching instruction response effect simultaneously, improves unit operation economy, stability and reliability.
Description
Technical field
The present invention relates to technical field of electric power, particularly a kind of control method to generating set and device.
Background technology
Electric power system comprises electrical network, provides the generating set of electric energy and various power consumption equipment.Automatic generation control (AGC) is a basic function in dispatch automated system, guarantee frequency quality of power grid and Tie line Power constant etc. in play vital effect.
Conventional electric power generation unit is due to the restriction of self-characteristic, when responsive electricity grid AGC instruction, usual needs adopt the method changing generator set control pattern to improve the governing speed of exerting oneself of generating set, improve AGC instruction response performance, meet the requirement of dispatching of power netwoks to generating set governing speed.Such as, governing speed of fired power generating unit being exerted oneself restriction improves, strengthen the strength of adjustment of generating set valve and boiler etc., or change unit allocation pattern into constant DP control pattern by the sliding pressure control pattern of efficiency optimization, to improve operating pressure, unit boiler accumulation of heat is utilized to improve unit output governing speed.
Improve generating set governing speed of exerting oneself and can cause negative effect to unit operation, comprising:
Coal consumption increases.Have analysis to show, unit is under fixed pressure operation pattern under comparatively sliding pressure operation pattern, and average coal consumption increases by more than 1%;
Unit operation is unstable.After improving unit output governing speed, easily cause unit actuator to comprise the vibration of boiler, drum, valve etc., cause the vibration of unit operation temperature and pressure to fluctuate;
Actuator's wearing and tearing are accelerated.Such as, under AGC operational mode, improve unit output governing speed, unit actuator can be caused, such as valve, frequent movement, cause unit increased wear, affect unit operation reliability and life-span.
For this reason, enter energy-storage system in the machine termination of generating set, after machine termination enters energy-storage system, energy-storage system can have been utilized to complete response that is a large amount of frequent, fast power dispatch command.So, after the machine end of energy-storage system access generating set, how effective generating set to be controlled, to reduce the requirement of generating set process regulations speed, promote operational efficiency and stability becomes the problem needing solution badly.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of control method to generating set and device, effectively to utilize generating set and energy-storage system advantage, reduces generating set loss and wearing and tearing, the effect of guaranteed output dispatch command response simultaneously.
The invention provides a kind of control method to generating set, for in electricity generation system, described electricity generation system comprises for generation of the generating set of exerting oneself, for controlling the gen-set control system of generating set, and the energy-storage system for coordinating generating set to run; Be in when described energy-storage system is current the state coordinating generating set to run, and when running status is normal, described method comprises:
Gen-set control system received power dispatch command;
Current the exerting oneself of gen-set control system determination generating set, and current to exert oneself and indicated output deviation in described power dispatching instruction;
Gen-set control system obtains the available regulating power of exerting oneself of energy-storage system;
Judge that can the available regulating power of exerting oneself of described energy-storage system make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set, if so, then reduce the governing speed of exerting oneself of generating set; Otherwise, improve the governing speed of exerting oneself of generating set.
Wherein, the step of the current regulating power of exerting oneself of described gen-set control system acquisition energy-storage system comprises:
According to the operating temperature of energy-storage system, judge
If energy-storage system operating temperature is within the scope of normal operating temperature, then the available regulating power of exerting oneself of energy-storage system is P
ess=P
rate;
If energy-storage system operating temperature is higher than normal operating temperature range limit, then the available regulating power of exerting oneself of energy-storage system is P
ess=P
ess=α * P
rate; Wherein, α is adjustment factor;
If energy-storage system operating temperature is higher than the upper limit in normal operating temperature scope, then the available regulating power of exerting oneself of energy-storage system is P
ess=0;
Wherein, P
essto exert oneself for energy-storage system is available regulating power, P
ratefor energy-storage system rated power.
Wherein, judge that can the available regulating power of exerting oneself of described energy-storage system make up current the exerting oneself of described generating set and to comprise with the step of indicated output deviation in described power dispatching instruction:
Determine that energy-storage system present charge state SOC runs charged state deviation SOC with setting
δ=SOC
ref-SOC
ess; Wherein, SOC
reffor energy-storage system present charge state, SOC
essfor the operation charged state of setting, SOC
δit is the deviation of said two devices;
Calculate cluster weight index
Wherein E is the specified stored energy of energy-storage system, P
ratefor energy-storage system rated power, T is time constant; P
δthe current P that exerts oneself of generating set
plantwith the P that exerts oneself indicated in described power dispatching instruction
aGCdeviation;
If cluster weight index K is less than the first predetermined threshold value, then the available regulating power of exerting oneself of energy-storage system can make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set;
If cluster weight index K is more than or equal to the first predetermined threshold value, then the available regulating power of exerting oneself of energy-storage system can not make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set.
Wherein, the governing speed of exerting oneself of described reduction generating set comprises: described generating set current for sliding pressure control pattern time, maintain current control model, current when being constant DP control pattern at described generating set, switch to sliding pressure control pattern;
The governing speed of exerting oneself of described raising generating set comprises: described generating set current for sliding pressure control pattern time, switch to constant DP control pattern; Current when being constant DP control pattern at described generating set, maintain current control model.
Wherein, the step of the current regulating power of exerting oneself of described gen-set control system acquisition energy-storage system comprises:
According to the present charge state of energy-storage system, judge
Energy-storage system present charge state is within the scope of normal charging condition, then the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, P
discharge,
If energy-storage system present charge state is higher than normal charging condition range limit, then the available regulating power of exerting oneself of energy-storage system is P
ess={ β * P
charge, P
discharge, wherein, β is adjustment factor;
If energy-storage system present charge state is lower than normal charging condition range lower limit, then the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, γ * P
discharge, wherein, γ is adjustment factor;
If energy-storage system present charge state is higher than the upper limit in normal charging condition scope, then the available regulating power of exerting oneself of energy-storage system is P
ess={ 0, P
discharge;
If energy-storage system present charge state is lower than lower limit under normal charging condition scope, then the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, 0};
Wherein, P
chargefor energy-storage system can provide maximum charge power, P
dischargefor energy-storage system can provide maximum discharge power.
Wherein, judge that can the available regulating power of exerting oneself of described energy-storage system make up current the exerting oneself of described generating set and to comprise with the step of indicated output deviation in described power dispatching instruction:
By the P that exerts oneself current for generating set
plantwith the P that exerts oneself indicated in described power dispatching instruction
aGCdeviation P
δcontrast,
If P
δ<min{P
charge, P
discharge, or, min{P
charge, P
discharge<P
δ< ε * min{P
charge, P
discharge, then the available regulating power of exerting oneself of energy-storage system can make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set;
If P
δ> ε * min{P
charge, P
discharge, then the available regulating power of exerting oneself of energy-storage system can not make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set;
Wherein, ε is coefficient, min{P
charge, P
dischargefor getting P
chargewith P
dischargein little value.
Wherein, the governing speed of exerting oneself of described reduction generating set comprises:
At P
δ<min{P
charge, P
dischargetime, keep generating set to exert oneself constant;
At min{P
charge, P
discharge<P
δ<2*min{P
charge, P
dischargetime, setting generating set governing speed of exerting oneself is restricted to the first governing speed V1;
The governing speed of exerting oneself of described raising generating set comprises:
At P
δ>2*min{P
charge, P
dischargetime, setting generating set governing speed of exerting oneself is restricted to the second governing speed V2;
Wherein, described first governing speed V1 is less than described second governing speed V2.
Present invention also offers a kind of control device to generating set, for in electricity generation system, described electricity generation system comprises for generation of the generating set of exerting oneself, for controlling the gen-set control system of generating set, and the energy-storage system for coordinating generating set to run; Be in when described energy-storage system is current the state coordinating generating set to run, and when running status is normal, described device comprises:
Receiving element, for received power dispatch command;
Computing unit, for determining current the exerting oneself of generating set, and current to exert oneself and indicated output deviation in described power dispatching instruction;
Acquiring unit, obtains the available regulating power of exerting oneself of energy-storage system for gen-set control system;
Judging adjustment unit, for judging that can the available regulating power of exerting oneself of described energy-storage system make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set, if so, then reducing the governing speed of exerting oneself of generating set; Otherwise, improve the governing speed of exerting oneself of generating set.
Wherein, described acquiring unit comprises:
First judgment sub-unit, judges for the operating temperature according to energy-storage system,
First obtains subelement, for when energy-storage system operating temperature is within the scope of normal operating temperature, determines that the available regulating power of exerting oneself of energy-storage system is P
ess=P
rate; When energy-storage system operating temperature is higher than normal operating temperature range limit, determine that the available regulating power of exerting oneself of energy-storage system is P
ess=α * P
rate; Wherein α is adjustment factor; In energy-storage system operating temperature higher than the upper limit in normal operating temperature scope, determine that the available regulating power of exerting oneself of energy-storage system is P
ess=0; Wherein, P
essto exert oneself for energy-storage system is available regulating power, P
ratefor energy-storage system rated power;
Described judgement adjustment unit comprises:
Charged state deviation computation subunit, for determining that energy-storage system present charge state SOC runs charged state deviation SOC with setting
δ=SOC
ref-SOC
ess;
Weight calculation subelement, for calculating cluster weight index
wherein E is the specified stored energy of energy-storage system, P
ratefor energy-storage system rated power, T is time constant; P
δthe current P that exerts oneself of generating set
plantwith the P that exerts oneself indicated in described power dispatching instruction
aGCdeviation;
The first ability recognin unit, for when cluster weight index K is less than the first predetermined threshold value, determines that the available regulating power of exerting oneself of energy-storage system can make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set; When cluster weight index K is more than or equal to the first predetermined threshold value, determine that the available regulating power of exerting oneself of energy-storage system can not make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set;
First adjustment subelement, for can make up current the exerting oneself with in described power dispatching instruction during indicated output deviation of described generating set at the available regulating power of exerting oneself of described energy-storage system, reduces the governing speed of exerting oneself of generating set; Otherwise, improve the governing speed of exerting oneself of generating set.
Wherein, described acquiring unit comprises:
Second judgment sub-unit, judges for the present charge state according to energy-storage system,
Second obtains subelement, for when energy-storage system present charge state is within the scope of normal charging condition, determines that the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, P
discharge, when energy-storage system present charge state is higher than normal charging condition range limit, determine that the available regulating power of exerting oneself of energy-storage system is P
ess={ β * P
charge, P
discharge, β is adjustment factor; When energy-storage system present charge state is lower than normal charging condition range lower limit, determine that the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, γ * P
discharge, γ is adjustment factor; Prescribe a time limit in normal charging condition scope at energy-storage system present charge state, determine that the available regulating power of exerting oneself of energy-storage system is P
ess={ 0, P
discharge; In limited time lower under energy-storage system present charge state is lower than normal charging condition scope, determine that the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, 0}; Wherein, P
chargefor energy-storage system can provide maximum charge power, P
dischargefor energy-storage system can provide maximum discharge power;
Described judgement adjustment unit comprises:
Contrast subunit, for by the P that exerts oneself current for generating set
plantwith the P that exerts oneself indicated in described power dispatching instruction
aGCdeviation P
δcontrast,
The second ability recognin unit, at P
δ<min{P
charge, P
discharge, or, min{P
charge, P
discharge<P
δ< ε * min{P
charge, P
dischargetime, determine that the available regulating power of exerting oneself of energy-storage system can make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set; At P
δ> ε * min{P
charge, P
dischargetime, determine that the available regulating power of exerting oneself of energy-storage system can not make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set; Wherein, ε is coefficient, min{P
charge, P
dischargefor getting P
chargewith P
dischargein little value;
Second adjustment subelement, for can make up current the exerting oneself with in described power dispatching instruction during indicated output deviation of described generating set at the available regulating power of exerting oneself of described energy-storage system, reduces the governing speed of exerting oneself of generating set; Otherwise, improve the governing speed of exerting oneself of generating set.
The control method to generating set that application the embodiment of the present application provides and device, in generating set and energy-storage system parallel running, based on the different running statuses of generating set, energy-storage system and power dispatching instruction, different control modes is adopted to generating set, reach and effectively utilize generating set and energy-storage system advantage, reduce generating set loss and wearing and tearing, the object of the effect of guaranteed output dispatch command response simultaneously, decrease regulating frequency and the stress of generating set actuator, improve unit operation economy, stability and reliability.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the control method flow chart to generating set according to the embodiment of the present invention;
Fig. 2 is the control device structural representation to generating set according to the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In the existing production system of power plants generating electricity unit, remote terminal unit (RTU, RemoteTerminalUnit) be the tie that factory's net signal connects, automatic generation amount is controlled (AGC by power network dispatching system on the one hand, AutomaticGenerationControl) instruction is issued to power plant RTU according to communication protocol, and power plant RTU is handed down to gen-set control system director data again and exerts oneself to control generating set; On the other hand, power plant RTU carries out acquisition process the creation datas such as force signal that go out of generating set, and transmission feeds back to power network dispatching system, enables power network dispatching system monitor the production status such as to exert oneself of generating set in real time.By above-mentioned closed loop procedure, realize generating set and to exert oneself according to the AGC that power network dispatching system exports effective operation of instruction.
After energy-storage system access Power Plant Side generator end, need the machine of generating set to bring out force signal and energy-storage system to go out force signal and merge according to the electricity electrical system access mode of reality and energy exchange situation, form a reflection generator end overall system actual data-signal of exerting oneself, to exert oneself signal data to replace original generating set feeding back to power network dispatching system of uploading.
The object of access energy-storage system is to utilize energy-storage system to complete response that is a large amount of frequent, fast power dispatch command, significantly to alleviate the conciliation pressure of generating set, under making generating set remain on more economical stable operational mode, increase substantially generating set operational efficiency, thus, control the method for generating set when needing one to be enclosed within energy-storage system access thereupon.
See Fig. 1, it is the control method flow chart to generating set according to the embodiment of the present invention, the present embodiment is used in electricity generation system, described electricity generation system comprises for generation of the generating set of exerting oneself, for controlling the gen-set control system of generating set, and the energy-storage system for coordinating generating set to run; Be in when described energy-storage system is current the state coordinating generating set to run, and when running status is normal, described method comprises:
Step 101, gen-set control system received power dispatch command;
Here, this power dispatching instruction can be directly from the dispatch command of electrical network, also can be the power dispatching instruction of exerting oneself for generating set after being decomposed by the described dispatch command from electrical network;
Step 102, current the exerting oneself of gen-set control system determination generating set, and current to exert oneself and indicated output deviation in described power dispatching instruction;
Concrete, current to exert oneself and indicated output deviation P in described power dispatching instruction
δwhat=generating set was current exert oneself P
plantthe P that exerts oneself indicated in-described power dispatching instruction
aGC;
Step 103, gen-set control system obtains the available regulating power of exerting oneself of energy-storage system;
Step 104, judges that can the available regulating power of exerting oneself of described energy-storage system make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set, if so, then reduces the governing speed of exerting oneself of generating set; Otherwise, improve the governing speed of exerting oneself of generating set.
It should be noted that, can energy-storage system operating state signal be passed through, know that energy-storage system is current and whether be in the state coordinating generating set to run, and whether running status is normal.Described energy-storage system operating state signal, by obtaining with the communication of energy-storage system, also can be obtained by overlayer monitors system or other modes.Here, the mode obtaining energy-storage system operating state signal is not limited.If current not being in of energy-storage system coordinates generating set running status, then setting machine end energy-storage system in parallel can provide regulating power scope of exerting oneself to be 0.
After energy-storage system access machine end, by changing the control to generating set, under making generating set remain on more economical stable operational mode, increase substantially generating set operational efficiency, reduce generating set coal consumption, decrease regulating frequency and the stress of generating set actuator, reduce the running wastage of generating set, improve unit operation stability and reliability.
Embodiment one:
When a kind of possible, if machine end energy-storage system in parallel is not in coordinate generating set running status, then setting machine end energy-storage system in parallel can provide regulating power scope of exerting oneself to be P
ess=0; If energy-storage system is current be in the state coordinating generating set to run, and running status is normal, then
In above-mentioned steps 103, the step of the current regulating power of exerting oneself of gen-set control system acquisition energy-storage system comprises:
According to the operating temperature of energy-storage system, judge
If energy-storage system operating temperature is within the scope of normal operating temperature, then the available regulating power of exerting oneself of energy-storage system is P
ess=P
rate;
If energy-storage system operating temperature is higher than normal operating temperature range limit, then the available regulating power of exerting oneself of energy-storage system is P
ess=α * P
rate; Wherein, α is adjustment factor; The concrete value of α can be determined according to actual condition, and in a possible embodiment, above-mentioned adjustment factor α is 0.5;
If energy-storage system operating temperature is higher than the upper limit in normal operating temperature scope, then the available regulating power of exerting oneself of energy-storage system is P
ess=0;
Wherein, P
essto exert oneself for energy-storage system is available regulating power, P
ratefor energy-storage system rated power.
Now, judge in above-mentioned steps 104 that can the available regulating power of exerting oneself of described energy-storage system make up current the exerting oneself of described generating set and to comprise with the step of indicated output deviation in described power dispatching instruction:
Determine that energy-storage system present charge state SOC runs charged state deviation SOC with setting
δ=SOC
ref-SOC
ess; Wherein, SOC
reffor energy-storage system present charge state, SOC
essfor the operation charged state of setting, SOC
δit is the deviation of said two devices;
Calculate cluster weight index
Wherein E is the specified stored energy of energy-storage system, P
ratefor energy-storage system rated power, T is time constant, preferably, and T=240s; P
δthe current P that exerts oneself of generating set
plantwith the P that exerts oneself indicated in described power dispatching instruction
aGCdeviation;
Such as, if cluster weight index K is less than the first predetermined threshold value, K<2, then the available regulating power of exerting oneself of energy-storage system can make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set;
Such as, if cluster weight index K is more than or equal to the first predetermined threshold value, K >=2, then the available regulating power of exerting oneself of energy-storage system can not make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set.
In these cases, the governing speed of exerting oneself reducing generating set in aforementioned abovementioned steps 104 comprises: described generating set current for sliding pressure control pattern time, maintain current control model, current when being constant DP control pattern at described generating set, switch to sliding pressure control pattern; The governing speed of exerting oneself of aforementioned raising generating set comprises: described generating set current for sliding pressure control pattern time, switch to constant DP control pattern; Current when being constant DP control pattern at described generating set, maintain current control model.
So far, the control model by changing generating set reduces or improves the governing speed of exerting oneself of generating set.
Embodiment two:
When another kind is possible, if machine end energy-storage system in parallel is not in coordinate generating set running status, then setting machine end energy-storage system in parallel can provide regulating power scope of exerting oneself to be P
ess={ 0,0}; If energy-storage system is current be in the state coordinating generating set to run, and running status is normal, then
In above-mentioned steps 103, the step of the current regulating power of exerting oneself of gen-set control system acquisition energy-storage system comprises:
According to the present charge state of energy-storage system, judge
Energy-storage system present charge state is within the scope of normal charging condition, then the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, P
discharge,
If energy-storage system present charge state is higher than normal charging condition range limit, then the available regulating power of exerting oneself of energy-storage system is P
ess={ β * P
charge, P
discharge; Wherein, β is adjustment factor; The concrete value of β can be determined according to actual condition, and in a possible embodiment, above-mentioned adjustment factor β is 0.5;
If energy-storage system present charge state is lower than normal charging condition range lower limit, then the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, γ * P
discharge; Wherein, γ is adjustment factor; The concrete value of γ can be determined according to actual condition, and in a possible embodiment, above-mentioned adjustment factor γ is 0.5, and certainly, the value of β and γ can be the same or different;
If energy-storage system present charge state is higher than the upper limit in normal charging condition scope, then the available regulating power of exerting oneself of energy-storage system is P
ess={ 0, P
discharge;
If energy-storage system present charge state is lower than lower limit under normal charging condition scope, then the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, 0};
Wherein, P
chargefor energy-storage system can provide maximum charge power, P
dischargefor energy-storage system can provide maximum discharge power.
Now, judge in above-mentioned steps 104 that can the available regulating power of exerting oneself of described energy-storage system make up current the exerting oneself of described generating set and to comprise with the step of indicated output deviation in described power dispatching instruction:
By the P that exerts oneself current for generating set
plantwith the P that exerts oneself indicated in described power dispatching instruction
aGCdeviation P
δcontrast,
If P
δ<min{P
charge, P
discharge, or, min{P
charge, P
discharge<P
δ< ε * min{P
charge, P
discharge, then the available regulating power of exerting oneself of energy-storage system can make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set;
If P
δ> ε * min{P
charge, P
discharge, then the available regulating power of exerting oneself of energy-storage system can not make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set;
Wherein, ε is coefficient; The concrete value of ε can be determined according to actual condition, and in a possible embodiment, above-mentioned adjustment factor ε is 2, min{P
charge, P
dischargefor getting P
chargewith P
dischargein little value.
In these cases, the governing speed of exerting oneself reducing generating set in step 104 comprises:
At P
δ<min{P
charge, P
dischargetime, keep generating set to exert oneself constant;
At min{P
charge, P
discharge<P
δ<2*min{P
charge, P
dischargetime, setting generating set governing speed of exerting oneself is restricted to the first governing speed V1;
The governing speed of exerting oneself improving generating set in step 104 comprises: at P
δ>2*min{P
charge, P
dischargetime, setting generating set governing speed of exerting oneself is restricted to the second governing speed V2;
Wherein, described first governing speed V1 is less than described second governing speed V2.
So far, the governing speed parameter by changing generating set reduces or improves the governing speed of exerting oneself of generating set.
It should be noted that, the application focuses on, judge the available regulating power of exerting oneself of energy-storage system can make up generating set current exert oneself with in power dispatching instruction during indicated output deviation, extra regulatory function of exerting oneself is provided without the need to generating set, economy and the preferential control mode of stability can be adopted, therefore can reduce the governing speed of exerting oneself of generating set; Otherwise, adopt the control mode that power instruction response effect is preferential, need generating set with governing speed of exerting oneself faster, with the deviation reduced and between power dispatching instruction, avoid because system regulating power deficiency of exerting oneself causes impact on power dispatching instruction trace effect.
In above-mentioned two possible embodiments, it is the governing speed of exerting oneself reducing or improve generating set by changing the control model of generating set or governing speed parameter, certainly, also other control method can be adopted to reduce or improve the governing speed of exerting oneself of generating set, such as, control the fluctuation of steam turbine pressure, carry out temperature limiting etc.In a word, the application does not limit the specific implementation of the governing speed of exerting oneself reducing or improve generating set, and any possible implementation can be applied in the application.
The control method to generating set that application the embodiment of the present application provides, in energy-storage system access power management and running situation, generating set reduces regulations speed requirement of exerting oneself, and improves operational efficiency and stability, thus improves economy and the reliability of generating set operation; Otherwise then generating set improves regulations speed requirement of exerting oneself, and improves the response effect to power instruction, meets operation of power networks requirement.By the control to generating set, optimize the performance objective under different operating condition, reach and improve operational effect, improve the object running income, especially under the clear condition of energy-storage system access power management and running, can significantly reduce unit operation coal consumption, reduce and run stress, reduce actuator's wearing and tearing.
See Fig. 2, it is the control device structural representation to generating set according to the embodiment of the present invention, device described in Fig. 2 is used in electricity generation system, described electricity generation system comprises for generation of the generating set of exerting oneself, for controlling the gen-set control system of generating set, and the energy-storage system for coordinating generating set to run; Be in when described energy-storage system is current the state coordinating generating set to run, and when running status is normal, described device comprises:
Receiving element 201, for received power dispatch command;
Computing unit 202, for determining current the exerting oneself of generating set, and current to exert oneself and indicated output deviation in described power dispatching instruction;
Acquiring unit 203, obtains the available regulating power of exerting oneself of energy-storage system for gen-set control system;
Judging adjustment unit 204, for judging that can the available regulating power of exerting oneself of described energy-storage system make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set, if so, then reducing the governing speed of exerting oneself of generating set; Otherwise, improve the governing speed of exerting oneself of generating set.
In a kind of possible embodiment,
Wherein, described acquiring unit 203 can comprise:
First judgment sub-unit (not shown), judges for the operating temperature according to energy-storage system,
First obtains subelement (not shown), for when energy-storage system operating temperature is within the scope of normal operating temperature, determines that the available regulating power of exerting oneself of energy-storage system is P
ess=P
rate; When energy-storage system operating temperature is higher than normal operating temperature range limit, determine that the available regulating power of exerting oneself of energy-storage system is P
ess=α * P
rate; Wherein, α is adjustment factor; In energy-storage system operating temperature higher than the upper limit in normal operating temperature scope, determine that the available regulating power of exerting oneself of energy-storage system is P
ess=0; Wherein, P
essto exert oneself for energy-storage system is available regulating power, P
ratefor energy-storage system rated power.
Described judgement adjustment unit 204 can comprise:
Charged state deviation computation subunit (not shown), for determining that energy-storage system present charge state SOC runs charged state deviation SOC with setting
δ=SOC
ref-SOC
ess;
Weight calculation subelement (not shown), for calculating cluster weight index
wherein E is the specified stored energy of energy-storage system, P
ratefor energy-storage system rated power, T is time constant; P
δthe current P that exerts oneself of generating set
plantwith the P that exerts oneself indicated in described power dispatching instruction
aGCdeviation;
The first ability recognin unit (not shown), for when cluster weight index K is less than the first predetermined threshold value, determine that the available regulating power of exerting oneself of energy-storage system can make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set; When cluster weight index K is more than or equal to the first predetermined threshold value, determine that the available regulating power of exerting oneself of energy-storage system can not make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set;
First adjustment subelement (not shown), for can make up current the exerting oneself with in described power dispatching instruction during indicated output deviation of described generating set at the available regulating power of exerting oneself of described energy-storage system, reduce the governing speed of exerting oneself of generating set; Otherwise, improve the governing speed of exerting oneself of generating set.
In embodiment possible in another,
Above-mentioned acquiring unit 203 can comprise:
Second judgment sub-unit (not shown), judges for the present charge state according to energy-storage system,
Second obtains subelement (not shown), for when energy-storage system present charge state is within the scope of normal charging condition, determines that the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, P
discharge, when energy-storage system present charge state is higher than normal charging condition range limit, determine that the available regulating power of exerting oneself of energy-storage system is P
ess={ β * P
charge, P
discharge, β is adjustment factor; When energy-storage system present charge state is lower than normal charging condition range lower limit, determine that the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, γ * P
discharge, γ is adjustment factor; Prescribe a time limit in normal charging condition scope at energy-storage system present charge state, determine that the available regulating power of exerting oneself of energy-storage system is P
ess={ 0, P
discharge; In limited time lower under energy-storage system present charge state is lower than normal charging condition scope, determine that the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, 0}; Wherein, P
chargefor energy-storage system can provide maximum charge power, P
dischargefor energy-storage system can provide maximum discharge power.
Above-mentioned judgement adjustment unit 204 can comprise:
Contrast subunit (not shown), for by the P that exerts oneself current for generating set
plantwith the P that exerts oneself indicated in described power dispatching instruction
aGCdeviation P
δcontrast,
The second ability recognin unit (not shown), at P
δ<min{P
charge, P
discharge, or, min{P
charge, P
discharge<P
δ< ε * min{P
charge, P
dischargetime, determine that the available regulating power of exerting oneself of energy-storage system can make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set; At P
δ> ε * min{P
charge, P
dischargetime, determine that the available regulating power of exerting oneself of energy-storage system can not make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set; Wherein, ε is coefficient, min{P
charge, P
dischargefor getting P
chargewith P
dischargein little value;
Second adjustment subelement (not shown), for can make up current the exerting oneself with in described power dispatching instruction during indicated output deviation of described generating set at the available regulating power of exerting oneself of described energy-storage system, reduce the governing speed of exerting oneself of generating set; Otherwise, improve the governing speed of exerting oneself of generating set.
The control device to generating set that application the embodiment of the present application provides, in generating set and energy-storage system parallel running, based on the different running statuses of generating set, energy-storage system and power dispatching instruction, different control modes is adopted to generating set, reach and effectively utilize generating set and energy-storage system advantage, reduce generating set loss and wearing and tearing, the object of the effect of guaranteed output dispatch command response simultaneously, decrease regulating frequency and the stress of generating set actuator, improve unit operation economy, stability and reliability.
For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
It should be noted that, the generating set in the embodiment of the present application can be fired power generating unit, Hydropower Unit, wind turbine generator, gas turbine set etc.
It should be noted that, energy-storage system in the embodiment of the present application can be applied in the power dispatching class application of various active power and/or reactive power, and as comprised AGC application, frequency modulation application, wind turbine generator power output is smoothly applied, unit output error compensation is applied, rotate back-up application etc.
It should be noted that, the energy-storage system in the embodiment of the present application can be made up of all types of battery energy storage system, as being lithium battery, sodium-sulphur battery, flow battery etc., or, can also be made up of flywheel energy storage system.In this application, do not limit number and the kind of energy-storage system, in above-mentioned any embodiment, described energy-storage system can be made up of an energy storage device, or by many groups, the parallel connection of polymorphic type energy storage device forms.
It should be noted that, before generating set being adopted to the control method described in the embodiment of the present application, the different control methods that other are feasible can be adopted.Its target is when energy-storage system accesses and coordinates generating set to run, generating set adopts with the optimum control mode for target of operational efficiency, when the non-access power management and running of energy-storage system, generating set adopts with the optimum control mode for target of governing speed, thus reaches the optimized operation effect under different conditions.
It should be noted that, generating set in above-described embodiment can be one also can be multiple stage, same, above-mentioned energy-storage system also can be made up of an energy storage device, also can be by many groups, the parallel connection of polymorphic type energy storage device forms, the compound mode of generating set and energy-storage system is not limited in the application.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
One of ordinary skill in the art will appreciate that all or part of step realized in said method execution mode is that the hardware that can carry out instruction relevant by program has come, described program can be stored in computer read/write memory medium, here the alleged storage medium obtained, as: ROM/RAM, magnetic disc, CD etc.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (10)
1. the control method to generating set, it is characterized in that, for in electricity generation system, described electricity generation system comprises for generation of the generating set of exerting oneself, for controlling the gen-set control system of generating set, and the energy-storage system for coordinating generating set to run; Be in when described energy-storage system is current the state coordinating generating set to run, and when running status is normal, described method comprises:
Gen-set control system received power dispatch command; Wherein, described power dispatching instruction is: from the dispatch command of electrical network, or, the power dispatching instruction of exerting oneself for generating set after the dispatch command from electrical network is decomposed;
Current the exerting oneself of gen-set control system determination generating set, and current to exert oneself and indicated output deviation in described power dispatching instruction;
Gen-set control system obtains the available regulating power of exerting oneself of energy-storage system;
Judge that can the available regulating power of exerting oneself of described energy-storage system make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set, if so, then reduce the governing speed of exerting oneself of generating set; Otherwise, improve the governing speed of exerting oneself of generating set.
2. method according to claim 1, is characterized in that, the step that described gen-set control system obtains the current regulating power of exerting oneself of energy-storage system comprises:
According to the operating temperature of energy-storage system, judge
If energy-storage system operating temperature is within the scope of normal operating temperature, then the available regulating power of exerting oneself of energy-storage system is P
ess=P
rate;
If energy-storage system operating temperature is higher than normal operating temperature range limit, then the available regulating power of exerting oneself of energy-storage system is P
ess=P
ess=α * P
rate; Wherein, α is adjustment factor;
If energy-storage system operating temperature is higher than the upper limit in normal operating temperature scope, then the available regulating power of exerting oneself of energy-storage system is P
ess=0;
Wherein, P
essto exert oneself for energy-storage system is available regulating power, P
ratefor energy-storage system rated power.
3. method according to claim 2, is characterized in that, judges that can the available regulating power of exerting oneself of described energy-storage system make up current the exerting oneself of described generating set and to comprise with the step of indicated output deviation in described power dispatching instruction:
Determine that energy-storage system present charge state SOC runs charged state deviation SOC with setting
δ=SOC
ref-SOC
ess; Wherein, SOC
reffor energy-storage system present charge state, SOC
essfor the operation charged state of setting, SOC
δit is the deviation of said two devices;
Calculate cluster weight index
Wherein E is the specified stored energy of energy-storage system, P
ratefor energy-storage system rated power, T is time constant; P
δthe current P that exerts oneself of generating set
plantwith the P that exerts oneself indicated in described power dispatching instruction
aGCdeviation;
If cluster weight index K is less than the first predetermined threshold value, then the available regulating power of exerting oneself of energy-storage system can make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set;
If cluster weight index K is more than or equal to the first predetermined threshold value, then the available regulating power of exerting oneself of energy-storage system can not make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set.
4. method according to claim 3, is characterized in that,
The governing speed of exerting oneself of described reduction generating set comprises: described generating set current for sliding pressure control pattern time, maintain current control model, current when being constant DP control pattern at described generating set, switch to sliding pressure control pattern;
The governing speed of exerting oneself of described raising generating set comprises: described generating set current for sliding pressure control pattern time, switch to constant DP control pattern; Current when being constant DP control pattern at described generating set, maintain current control model.
5. method according to claim 1, is characterized in that, the step that described gen-set control system obtains the current regulating power of exerting oneself of energy-storage system comprises:
According to the present charge state of energy-storage system, judge
Energy-storage system present charge state is within the scope of normal charging condition, then the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, P
discharge,
If energy-storage system present charge state is higher than normal charging condition range limit, then the available regulating power of exerting oneself of energy-storage system is P
ess={ β * P
charge, P
discharge, wherein, β is adjustment factor;
If energy-storage system present charge state is lower than normal charging condition range lower limit, then the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, γ * P
discharge, wherein, γ is adjustment factor;
If energy-storage system present charge state is higher than the upper limit in normal charging condition scope, then the available regulating power of exerting oneself of energy-storage system is P
ess={ 0, P
discharge;
If energy-storage system present charge state is lower than lower limit under normal charging condition scope, then the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, 0};
Wherein, P
chargefor energy-storage system can provide maximum charge power, P
dischargefor energy-storage system can provide maximum discharge power.
6. method according to claim 5, is characterized in that, judges that can the available regulating power of exerting oneself of described energy-storage system make up current the exerting oneself of described generating set and to comprise with the step of indicated output deviation in described power dispatching instruction:
By the P that exerts oneself current for generating set
plantwith the P that exerts oneself indicated in described power dispatching instruction
aGCdeviation P
δcontrast,
If P
δ<min{P
charge, P
discharge, or, min{P
charge, P
discharge<P
δ< ε * min{P
charge, P
discharge, then the available regulating power of exerting oneself of energy-storage system can make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set;
If P
δ> ε * min{P
charge, P
discharge, then the available regulating power of exerting oneself of energy-storage system can not make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set;
Wherein, ε is coefficient, min{P
charge, P
dischargefor getting P
chargewith P
dischargein little value.
7. method according to claim 6, is characterized in that,
The governing speed of exerting oneself of described reduction generating set comprises:
At P
δ<min{P
charge, P
dischargetime, keep generating set to exert oneself constant;
At min{P
charge, P
discharge<P
δ<2*min{P
charge, P
dischargetime, setting generating set governing speed of exerting oneself is restricted to the first governing speed V1;
The governing speed of exerting oneself of described raising generating set comprises:
At P
δ>2*min{P
charge, P
dischargetime, setting generating set governing speed of exerting oneself is restricted to the second governing speed V2;
Wherein, described first governing speed V1 is less than described second governing speed V2.
8. the control device to generating set, it is characterized in that, for in electricity generation system, described electricity generation system comprises for generation of the generating set of exerting oneself, for controlling the gen-set control system of generating set, and the energy-storage system for coordinating generating set to run; Be in when described energy-storage system is current the state coordinating generating set to run, and when running status is normal, described device comprises:
Receiving element, for received power dispatch command; Wherein, described power dispatching instruction is: from the dispatch command of electrical network, or, the power dispatching instruction of exerting oneself for generating set after the dispatch command from electrical network is decomposed;
Computing unit, for determining current the exerting oneself of generating set, and current to exert oneself and indicated output deviation in described power dispatching instruction;
Acquiring unit, obtains the available regulating power of exerting oneself of energy-storage system for gen-set control system;
Judging adjustment unit, for judging that can the available regulating power of exerting oneself of described energy-storage system make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set, if so, then reducing the governing speed of exerting oneself of generating set; Otherwise, improve the governing speed of exerting oneself of generating set.
9. device according to claim 8, is characterized in that,
Described acquiring unit comprises:
First judgment sub-unit, judges for the operating temperature according to energy-storage system,
First obtains subelement, for when energy-storage system operating temperature is within the scope of normal operating temperature, determines that the available regulating power of exerting oneself of energy-storage system is P
ess=P
rate; When energy-storage system operating temperature is higher than normal operating temperature range limit, determine that the available regulating power of exerting oneself of energy-storage system is P
ess=α * P
rate; Wherein α is adjustment factor; In energy-storage system operating temperature higher than the upper limit in normal operating temperature scope, determine that the available regulating power of exerting oneself of energy-storage system is P
ess=0; Wherein, P
essto exert oneself for energy-storage system is available regulating power, P
ratefor energy-storage system rated power;
Described judgement adjustment unit comprises:
Charged state deviation computation subunit, for determining that energy-storage system present charge state SOC runs charged state deviation SOC with setting
δ=SOC
ref-SOC
ess; Wherein, SOC
reffor energy-storage system present charge state, SOC
essfor the operation charged state of setting, SOC
δit is the deviation of said two devices;
Weight calculation subelement, for calculating cluster weight index
wherein E is the specified stored energy of energy-storage system, P
ratefor energy-storage system rated power, T is time constant; P
δthe current P that exerts oneself of generating set
plantwith the P that exerts oneself indicated in described power dispatching instruction
aGCdeviation;
The first ability recognin unit, for when cluster weight index K is less than the first predetermined threshold value, determines that the available regulating power of exerting oneself of energy-storage system can make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set; When cluster weight index K is more than or equal to the first predetermined threshold value, determine that the available regulating power of exerting oneself of energy-storage system can not make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set;
First adjustment subelement, for can make up current the exerting oneself with in described power dispatching instruction during indicated output deviation of described generating set at the available regulating power of exerting oneself of described energy-storage system, reduces the governing speed of exerting oneself of generating set; Otherwise, improve the governing speed of exerting oneself of generating set.
10. device according to claim 8, is characterized in that,
Described acquiring unit comprises:
Second judgment sub-unit, judges for the present charge state according to energy-storage system,
Second obtains subelement, for when energy-storage system present charge state is within the scope of normal charging condition, determines that the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, P
discharge, when energy-storage system present charge state is higher than normal charging condition range limit, determine that the available regulating power of exerting oneself of energy-storage system is P
ess={ β * P
charge, P
discharge, β is adjustment factor; When energy-storage system present charge state is lower than normal charging condition range lower limit, determine that the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, γ * P
discharge, γ is adjustment factor; Prescribe a time limit in normal charging condition scope at energy-storage system present charge state, determine that the available regulating power of exerting oneself of energy-storage system is P
ess={ 0, P
discharge; In limited time lower under energy-storage system present charge state is lower than normal charging condition scope, determine that the available regulating power of exerting oneself of energy-storage system is P
ess={ P
charge, 0}; Wherein, P
chargefor energy-storage system can provide maximum charge power, P
dischargefor energy-storage system can provide maximum discharge power;
Described judgement adjustment unit comprises:
Contrast subunit, for by the P that exerts oneself current for generating set
plantwith the P that exerts oneself indicated in described power dispatching instruction
aGCdeviation P
δcontrast,
The second ability recognin unit, at P
δ<min{P
charge, P
discharge, or, min{P
charge, P
discharge<P
δ< ε * min{P
charge, P
dischargetime, determine that the available regulating power of exerting oneself of energy-storage system can make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set; At P
δ> ε * min{Pcharge, during Pdischarge}, determines that the available regulating power of exerting oneself of energy-storage system can not make up current the exerting oneself and indicated output deviation in described power dispatching instruction of described generating set; Wherein, ε is coefficient, min{P
charge, P
dischargefor getting P
chargewith P
dischargein little value;
Second adjustment subelement, for can make up current the exerting oneself with in described power dispatching instruction during indicated output deviation of described generating set at the available regulating power of exerting oneself of described energy-storage system, reduces the governing speed of exerting oneself of generating set; Otherwise, improve the governing speed of exerting oneself of generating set.
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| CN107872071B (en) * | 2016-09-27 | 2020-02-11 | 北京睿能世纪科技有限公司 | Power generation method and device for supplying power to power grid |
| CN111244976B (en) * | 2020-03-09 | 2021-10-22 | 北京泓慧国际能源技术发展有限公司 | Power generation adjusting method and device based on flywheel energy storage |
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| CN101931241A (en) * | 2010-09-21 | 2010-12-29 | 许继集团有限公司 | Wind farm grid-connected coordination control method |
| CN202172301U (en) * | 2011-09-02 | 2012-03-21 | 北京航空航天大学 | Topology connection structure of energy storage battery and aero-generator |
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| CN101931241A (en) * | 2010-09-21 | 2010-12-29 | 许继集团有限公司 | Wind farm grid-connected coordination control method |
| CN202172301U (en) * | 2011-09-02 | 2012-03-21 | 北京航空航天大学 | Topology connection structure of energy storage battery and aero-generator |
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Application publication date: 20140521 Assignee: Beijing Haibo Sichuang Technology Co.,Ltd. Assignor: RAY POWER SYSTEMS CO.,LTD. Contract record no.: X2022990000842 Denomination of invention: A control method and device for generator set Granted publication date: 20160427 License type: Common License Record date: 20221028 |