CN103997068A - Interconnected power grid automatic power generation control performance evaluation method under concentrated wind power access - Google Patents
Interconnected power grid automatic power generation control performance evaluation method under concentrated wind power access Download PDFInfo
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Abstract
The invention provides an interconnected power grid automatic power generation control performance evaluation method under concentrated wind power access. The method comprises the following steps: determining the wind power fluctuation regulation responsibility sharing coefficient K<i><+/-> of control areas of an interconnected power grid in the next scheduling period; determining the total wind power control error WCE of the interconnected power grid in the automatic power generation control period; determining the power grid frequency deviation Delta(f) and the area control error ACEi in each control period; and judging whether the control performance of each control area is qualified. The method is used for solving the problem that the automatic power generation control performance evaluation criteria is unfair to AGC control performance evaluation of local control areas with concentrated wind power and the problem of wind curtailment of rich wind power caused by poor regulation ability of a local power grid.
Description
Technical field
The present invention relates to the method in a kind of interconnected network automatic generation control field, specifically relate to a kind of large-scale wind power that adapts to and concentrate and interconnected network automatic generation control method of evaluating performance off the net.
Background technology
Interconnected network refers to electrical network interconnected by interprovincial power networks, independent province electrical network, large-scale Hydro-Thermal Systems base etc. and that form.In the interconnected network of every country, the active power control performance of each partial electric grid operation control area automatic generation control (AGC) is all to be evaluated and specification by its Performance evaluation criterion at present.For example, in the sixties in 20th century, A1, A2 control performance standard (being called for short A standard) that North America adopts the North America electric reliability committee (NERC) to issue always.Operation is put into practice and is shown, the raising that the A of each controlled area controls index can not ensure the frequency quality that interconnected network is good, has obvious deficiency at aspects such as accident support, unit adjustings.1997, NERC proposed new CPS1 and CPS2 standard (being called for short CPS standard), and the effect of the control behavior that is intended to evaluate more objectively each controlled area to interconnected electric power system, ensures the control of interconnected network frequency-interconnection within the limits prescribed.The effect of the control behavior that this standard can be evaluated each control area relatively objectively to interconnected electric power system frequency stabilization is the standard that can meet preferably up to now interconnected electric power system service requirement.
But along with the intermittent power supplys such as wind-powered electricity generation are concentrated access interconnected network on a large scale, the fluctuation of wind-powered electricity generation brings new challenge to peak regulation, the frequency modulation of some partial electric grid of the high infiltration of wind-powered electricity generation.For the partial electric grid scheduling controlling that comprises wind-powered electricity generation, require wind energy turbine set that wind-powered electricity generation prognoses system is installed at present, the short-time rating of energy predict future wind-powered electricity generation, and reporting scheduling control centre.Control centre requires wind energy turbine set according to reporting predicted value to plan generating, wind-powered electricity generation is actual exert oneself and predicted value between deviation automatically rectified a deviation by the AGC unit in partial electric grid.
At present, the precision of prediction of wind-powered electricity generation is on the low side, and short-term forecast worst error a few days ago can reach 20%.Therefore, rely on partial electric grid self in-situ balancing wind-powered electricity generation fluctuating power just to require in partial electric grid, to there is certain quick adjustment resource.But because wind-powered electricity generation is concentrated after access partial electric grid on a large scale, its stochastic volatility makes the frequency adjustment resource of the partial electric grid that comprises this wind-powered electricity generation seem relatively nervous, for example Northeast Area of China, wind-powered electricity generation is concentrated this regional power grid of access on a large scale, the wind-powered electricity generation fluctuating range of exerting oneself winter is large, but because a large amount of units participate in heat supply in winter, cannot participate in peak shaving frequency modulation, this is also to cause electrical network wind-powered electricity generation to abandon one of reason of wind.The shortcoming of the balance wind-powered electricity generation fluctuation ability of partial electric grid self just often needs the power of other partial electric grids in interconnected network to support, and this support realizes by CPS appraisal standards at present, but its support amount is very limited.If still remove the control performance of the controlled area of evaluation regulating power shortcoming, rich wind-powered electricity generation according to CPS standard, often cause this controlled area control performance not conform to lattice point and increase, thereby cause the unfairness of performance evaluation.The regional power grid of these rich wind-powered electricity generations is qualified in order to ensure the evaluation of CPS control performance simultaneously, often adopts some to abandon the means such as wind, causes the waste of wind-resources.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art, the invention provides a kind of wind-powered electricity generation and concentrate and interconnected network automatic generation control method of evaluating performance off the net, the method is evaluated inequitable problem and is caused the wind problem of abandoning of rich wind-powered electricity generation because of partial electric grid regulating power shortcoming the AGC control performance in the concentrated Partial controll region of wind-powered electricity generation for solving automatic generation control Performance evaluation criterion.
Realizing the solution that above-mentioned purpose adopts is:
Wind-powered electricity generation is concentrated and an interconnected network automatic generation control method of evaluating performance off the net, and its improvements are: said method comprising the steps of:
I, determine that the wind-powered electricity generation fluctuation of the each control area of described interconnected network in next dispatching cycle regulates division of responsibiltiy coefficient
II, determine the wind-powered electricity generation control total deviation WCE in the described interconnected network automatic generation control cycle;
III, determine mains frequency deviation delta f in each control cycle and the control deviation ACE of control area
i;
IV, judge that whether the control performance of each control area is qualified.
Further, described step I comprises the following steps:
S101, obtain the automatic-generation-control unit that participates in stabilizing wind-powered electricity generation power network fluctuation power in described interconnected network;
S102, prediction respectively comprise wind-powered electricity generation in the control area of wind-powered electricity generation and depart from error burst ± Δ P that its plan is exerted oneself
i w ';
S103, the wind-powered electricity generation of determining described interconnected network depart from maximum output error ± Δ P of its plan gross capability
w=Σ Δ P
i w ';
S104, according to described maximum output error+Δ P
w, each automatic-generation-control unit of stabilizing wind-electricity integration fluctuating power regulates unit cost C for subsequent use
iwith constraints one, determine the each automatic-generation-control unit regulatory demand amount that participates in stabilizing wind-electricity integration fluctuating power
make described interconnected network participate in stabilizing the automatic-generation-control unit adjustment cost sum of wind-electricity integration fluctuating power
minimum;
S105, exceed maximum output error+Δ P that exerts oneself of plan for wind-powered electricity generation
w, determine that described interconnected network participates in stabilizing each automatic-generation-control unit adjusting division of responsibiltiy coefficient of wind-electricity integration fluctuating power
S106, acquisition wind-powered electricity generation are exerted oneself and are exceeded the wind-powered electricity generation fluctuation adjusting division of responsibiltiy coefficient of each control area while plan
S107, according to described maximum output error-Δ P
w, each automatic-generation-control unit of stabilizing wind-electricity integration fluctuating power regulates unit cost C for subsequent use
iwith constraints two, determine the each automatic-generation-control unit regulatory demand amount that participates in stabilizing wind-electricity integration fluctuating power
make described interconnected network participate in stabilizing the automatic-generation-control unit adjustment cost sum of wind-electricity integration fluctuating power
minimum;
S108, the maximum output error-Δ P that exerts oneself planning for wind-powered electricity generation deficiency
w, determine that each automatic-generation-control unit that described interconnected network participates in for stabilizing wind-powered electricity generation fluctuation regulates division of responsibiltiy coefficient
When S109, the plan of acquisition wind-powered electricity generation undercapacity, the wind-powered electricity generation fluctuation of each control area regulates division of responsibiltiy coefficient
Further, described constraints one comprises:
A、
B、
C、?
In formula, P
i agcfor automatic-generation-control unit i is at the power initial value that participates in stabilizing before wind-powered electricity generation fluctuation regulates;
for the demand of the downward adjusting of wind-powered electricity generation fluctuation is stabilized in automatic-generation-control unit i participation;
for automatic-generation-control unit i minimum output limit value;
for the downward regulations speed of automatic-generation-control unit i; T is the dispatching of power netwoks cycle;
the vector forming for be used for the demand of the downward adjusting of stabilizing wind-powered electricity generation fluctuating power by the each automatic-generation-control unit of interconnected network;
the vector forming for be used for the demand of the downward adjusting of stabilizing load fluctuation power by the each automatic-generation-control unit of interconnected network; S is that automatic-generation-control unit regulates the sensitivity to interconnected network branch of a network trend;
for interconnected network automatic-generation-control unit participates in stabilizing wind-powered electricity generation and the front branch of a network trend of load fluctuation adjusting; P
tiefor interconnected network branch of a network trend safety limit; γ is interconnected network branch of a network trend margin of safety; N is the automatic-generation-control unit number that participates in stabilizing wind-powered electricity generation fluctuation.
Further, described constraints two comprises:
A、
B、
C、?
In formula, P
i agcfor automatic-generation-control unit i participates in stabilizing the power initial value before wind-powered electricity generation fluctuation regulates,
for automatic-generation-control unit i participates in stabilizing the demand upwards regulating of wind-powered electricity generation fluctuation;
for the high output limit value of automatic-generation-control unit i,
for the upwards regulations speed of automatic-generation-control unit i; T is the dispatching of power netwoks cycle;
for the vector being formed for stabilizing the demand upwards regulating of wind-powered electricity generation fluctuating power by the each automatic-generation-control unit of interconnected network;
for the vector being formed for stabilizing the demand upwards regulating of load fluctuation power by the each automatic-generation-control unit of interconnected network; S is that automatic-generation-control unit regulates the sensitivity to interconnected network branch of a network trend;
for interconnected network automatic-generation-control unit participates in stabilizing wind-powered electricity generation and the front branch of a network trend of load fluctuation adjusting; P
tiefor interconnected network branch of a network trend safety limit, γ is interconnected network branch of a network trend margin of safety; N is the automatic-generation-control unit number that participates in stabilizing wind-powered electricity generation fluctuation.
Further, described Step II comprises the following steps:
S201, determine the wind-powered electricity generation control deviation WCE of the each control area in the described interconnected network automatic generation control cycle
i=P
i wa-P
i ws;
In formula, P
i wafor actual the exerting oneself of wind-powered electricity generation of the control area i at current control cycle, P
i wsfor the wind-powered electricity generation plan of the control area i at current control cycle is exerted oneself;
S202, determine the wind-powered electricity generation control total deviation in the described interconnected network automatic generation control cycle
In formula, m is the number of described interconnected network containing the control area of wind-powered electricity generation.
Further, in described Step II I, determine the control deviation ACE of the control area in each control cycle
i=B
iΔ f+ (Σ P
ti-Σ I
0i);
In formula, Δ f=f-f
0, f is the mains frequency actual measured value in current control cycle, f
0for nominal frequency;
B
ifor the frequency deviation of control area i, Σ P
tifor the actual amount measured value sum of all Tie line Power of control area i, interconnection meter Σ I
0ifor the transaction plan sum of control area i and outer controlled area.
Further, in described step IV, carry out control performance evaluation by following evaluation method:
A, exert oneself and exceed plan generating when wind-powered electricity generation is actual:
A1, for the control area that comprises wind-powered electricity generation, meet following formula, it is qualified to control, otherwise defective;
A2, for not containing wind-powered electricity generation control area, meet following formula control qualified, otherwise defective;
B, exert oneself lower than plan generating when wind-powered electricity generation is actual:
B1, for the control area that comprises wind-powered electricity generation, meet following formula control qualified, otherwise defective;
B2, for not containing wind-powered electricity generation control area, meet following formula control qualified, otherwise defective;
In formula,
for regulating division of responsibiltiy coefficient, Δ f is mains frequency deviation, ACE
ifor the control deviation of control area, WCE is wind-powered electricity generation control total deviation, and N is ACE, the WCE in control performance evaluation cycle, the number of samples of Δ f, and ε is the root-mean-square value of the 1min mean value of the deviation of interior interconnected network actual frequency of 1 year period and standard frequency, B
sfor the total frequency departure coefficient B of described interconnected network
s=Σ B
i, B
ifor the frequency departure coefficient of the each regional power grid of described interconnected network.
Compared with prior art, the present invention has following beneficial effect:
1, the relation between method synthesis consideration of regional control deviation provided by the invention, wind-powered electricity generation fluctuation, frequency departure three is carried out performance evaluation, in interconnected network, both can be used for encouraging regulating the regional power grid of resource high-quality to support regulating the regional power grid a little less than resource, support great efforts, consider again the frequency safety of electrical network simultaneously, be conducive to the electrical network wind-powered electricity generation of dissolving more broadly, safely.
2, method of the present invention, ensure the favourable and adverse effect that interconnected network has wind-powered electricity generation controlled area and calm electric control district shared wind-powered electricity generation to fluctuate to mains frequency quality, solved existing automatic generation control Performance evaluation criterion the AGC control performance in the concentrated Partial controll region of wind-powered electricity generation is evaluated to inequitable problem.
3, method provided by the invention, in the time that the concentrated control area wind-powered electricity generation fluctuation of wind-powered electricity generation has worsened mains frequency quality, encourages the adjusting resource in non-wind-powered electricity generation centralized control district to support the concentrated control area of wind-powered electricity generation; In the time that the concentrated controlled area wind-powered electricity generation fluctuation of wind-powered electricity generation strengthens mains frequency quality, encourage the adjusting resource of the concentrated control area of wind-powered electricity generation to go to support the concentrated control area of non-wind-powered electricity generation.
4, method provided by the invention can be given full play to the complementarity of exerting oneself between wind-powered electricity generation control area, the control area that makes to have the wind-powered electricity generation fluctuation that benefits frequency retrieval helps to exist the wind-powered electricity generation fluctuation control area that is unfavorable for frequency retrieval, has embodied the interconnected spirit of helping each other of the each control area of interconnected network.
5, method provided by the invention encourages to transfer the fluctuation that the whole network regulates resource to remove to stabilize wind-powered electricity generation, has promoted the dissolve ability of electrical network to wind-powered electricity generation.
6, method provided by the invention is convenient to electrical network and is selected the good unit of cost performance to participate in stabilizing of wind-powered electricity generation fluctuation, has reduced the cost of stabilizing wind-powered electricity generation fluctuation of electrical network, has promoted the economy of operation of power networks.
Brief description of the drawings
Fig. 1 is that method of the present invention is to the structured flowchart that carries out control performance evaluation containing the control area of wind-powered electricity generation;
Fig. 2 is the structured flowchart that carries out control performance evaluation to not containing the control area of wind-powered electricity generation in method of the present invention;
Fig. 3 is method flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
As shown in Figure 3, the flow chart that Fig. 3 is method of the present invention, wind-powered electricity generation provided by the invention is concentrated and interconnected network automatic generation control method of evaluating performance off the net comprises the following steps:
Step 1, in current dispatching cycle, determine that the wind-powered electricity generation fluctuation of the each control area of described interconnected network in next dispatching cycle regulates division of responsibiltiy coefficient
;
Step 2, determine the wind-powered electricity generation control total deviation WCE in the described interconnected network automatic generation control cycle;
Step 3, determine mains frequency deviation delta f and Region control deviation ACE in each control cycle
i;
Step 4, judge that whether the control performance of each control area is qualified.
In the present embodiment, in step 1, within each dispatching of power netwoks cycle, (in the present embodiment, provide 15min), the maximum output and the minimum load that likely occur within next dispatching cycle for wind-powered electricity generation respectively, determine that the wind-powered electricity generation fluctuation of the each control area of interconnected network in next dispatching cycle regulates division of responsibiltiy COEFFICIENT K
i, specifically comprise the following steps:
S101, determine automatic generation control (AGC) unit that participates in stabilizing wind-electricity integration fluctuating power in described interconnected network;
S102, for each control area that comprises wind-powered electricity generation, prediction respectively comprises wind-powered electricity generation in the control area of wind-powered electricity generation and departs from error burst ± Δ P that its plan is exerted oneself
i w '; Comprise the following steps:
In S1021, current dispatching cycle, predict predicted value and the minimum load predicted value of the maximum output of next dispatching cycle;
S1022, obtain the planned value of next dispatching cycle;
S1023, by predicted value deduct planned value obtain wind-powered electricity generation depart from the error burst that its plan is exerted oneself;
S103, the wind-powered electricity generation of determining described interconnected network depart from maximum output error ± Δ P of its plan gross capability
w=Σ Δ P
i w ';
S104, exceed maximum output error+Δ P of plan for wind-powered electricity generation
w, each automatic-generation-control unit of stabilizing wind-electricity integration fluctuating power according to color jade regulates unit cost C for subsequent use
iwith constraints one, determine the each AGC unit regulatory demand amount that participates in stabilizing wind-electricity integration fluctuating power
make to participate in stabilizing in interconnected network the AGC unit adjustment cost sum of wind-electricity integration fluctuating power
minimum;
S105, exceed maximum output error+Δ P of plan for wind-powered electricity generation
w, as shown in the formula determining that described interconnected network participates in stabilizing each AGC unit adjusting division of responsibiltiy COEFFICIENT K of wind-electricity integration fluctuating power
i+:
S106, the automatic-generation-control unit that each control area is participated in stabilize respectively wind-electricity integration fluctuating power regulate division of responsibiltiy COEFFICIENT K
i+the summation that adds up, the wind-powered electricity generation fluctuation of the each control area when obtaining wind-powered electricity generation and exceeding plan generating regulates division of responsibiltiy coefficient
S107, exceed maximum output error-Δ P of plan for wind-powered electricity generation
w, each automatic-generation-control unit of stabilizing wind-electricity integration fluctuating power according to participation regulates unit cost C for subsequent use
iwith following constraints two, determine the each automatic-generation-control unit regulatory demand amount that participates in stabilizing wind-electricity integration fluctuating power
make interconnected network participate in stabilizing the automatic-generation-control unit adjustment cost sum of wind-electricity integration fluctuating power
minimum;
S108, the maximum output error-Δ P planning for wind-powered electricity generation deficiency
w, as shown in the formula determining that each automatic-generation-control unit that described interconnected network participates in for stabilizing wind-powered electricity generation fluctuation regulates division of responsibiltiy COEFFICIENT K
i-:
S109, the automatic-generation-control unit that each control area is participated in stabilize respectively wind-electricity integration fluctuating power regulate division of responsibiltiy COEFFICIENT K
i-the summation that adds up, the wind-powered electricity generation fluctuation of the each control area while obtaining the not enough plan generating of wind-powered electricity generation regulates division of responsibiltiy coefficient
Described division of responsibiltiy coefficient refers to that the regulated quantity of stabilizing wind-powered electricity generation fluctuation that this control area need to bear accounts for the percentage of the adjusting total amount of stabilizing wind-powered electricity generation fluctuation of bearing all control areas.
In the present embodiment, constraints one comprises:
A, the AGC unit self-technique constraint that participates in stabilizing wind-electricity integration fluctuating power:
Meet:
In formula, P
i agcfor automatic-generation-control unit i is at the power initial value that participates in stabilizing before wind-powered electricity generation fluctuation regulates;
for the demand of the downward adjusting of wind-powered electricity generation fluctuation is stabilized in automatic-generation-control unit i participation;
for AGC unit i minimum output limit value;
for the downward regulations speed of automatic-generation-control unit i; T is the dispatching of power netwoks cycle;
The Internet Transmission constraint of B, electrical network:
Meet:
In formula,
the vector forming for be used for the demand of the downward adjusting of stabilizing wind-powered electricity generation fluctuating power by the each AGC unit of interconnected network,
the vector forming for be used for the demand of the downward adjusting of stabilizing load fluctuation power by the each AGC unit of interconnected network, S is that AGC unit regulates the sensitivity to interconnected network branch of a network trend,
for interconnected network AGC unit participates in stabilizing wind-powered electricity generation and the front branch of a network trend of load fluctuation adjusting, P
tiefor interconnected network branch of a network trend safety limit, γ is interconnected network branch of a network trend margin of safety;
C, Constraints of Equilibrium:
Meet:
In formula,
for the demand of the downward adjusting of wind-powered electricity generation fluctuation is stabilized in AGC unit i participation; N is the AGC unit number that participates in stabilizing wind-powered electricity generation fluctuation.
In the present embodiment, constraints two comprises:
A, the constraint of AGC unit self-technique:
Meet:
In formula, P
i agcfor AGC unit i is at the power initial value that participates in stabilizing before wind-powered electricity generation fluctuation regulates,
for AGC unit i participates in stabilizing the demand upwards regulating of wind-powered electricity generation fluctuation;
for the high output limit value of AGC unit i,
for the upwards regulations speed of AGC unit i; T is the dispatching of power netwoks cycle;
The Internet Transmission constraint of B, electrical network:
Meet:
In formula,
for the vector being formed for stabilizing the demand upwards regulating of wind-powered electricity generation fluctuating power by the each AGC unit of interconnected network,
for the vector being made up of for stabilizing the demand upwards regulating of load fluctuation power the each AGC unit of interconnected network, S is that AGC unit regulates the sensitivity to interconnected network branch of a network trend,
for interconnected network AGC unit participates in stabilizing wind-powered electricity generation and the front branch of a network trend of load fluctuation adjusting, P
tiefor interconnected network branch of a network trend safety limit, γ is interconnected network branch of a network trend margin of safety;
C, Constraints of Equilibrium:
Meet:
In formula,
for AGC unit i participates in stabilizing the demand upwards regulating of wind-powered electricity generation fluctuation; N is the AGC unit number that participates in stabilizing wind-powered electricity generation fluctuation.
In the present embodiment, in step 2, at each AGC control cycle, calculate respectively the wind-powered electricity generation control deviation of each control area that comprises wind-powered electricity generation and the wind-powered electricity generation control deviation summation of all control areas that comprise wind-powered electricity generation, specifically comprise the following steps:
S201, as shown in the formula the wind-powered electricity generation control deviation WCE that determines the each control area in the described interconnected network automatic generation control cycle
i: WCE
i=P
i wa-P
i ws;
In formula, P
i wafor actual the exerting oneself of wind-powered electricity generation of the control area i at current control cycle, P
i wsfor the wind-powered electricity generation plan of the control area i at current control cycle is exerted oneself;
S202, as shown in the formula the wind-powered electricity generation control total deviation WCE determining in the described interconnected network automatic generation control cycle:
In formula, m is the number of described interconnected network containing the control area of wind-powered electricity generation.
In the present embodiment, in step 3, as shown in the formula the mains frequency deviation delta f and the Region control deviation ACE that determine in each control cycle
i:
ACE
i＝B
iΔf+(ΣP
ti-ΣI
0i)；
In formula, Δ f=f-f
0, f is the mains frequency actual measured value in current control cycle, f
0for nominal frequency;
B
ifor the frequency deviation of control area i, Σ P
tifor the actual amount measured value sum of all Tie line Power of control area i, interconnection meter Σ I
0ifor the transaction plan sum of control area i and outer controlled area.
Described transaction plan refers to send, be subject to electrical power plan between Yu Wai control area, this control area.
In the present embodiment, in step 4, according to wind-powered electricity generation fluctuation share the wind-powered electricity generation control deviation of coefficient, each controlled area that comprises wind-powered electricity generation, wind-powered electricity generation control deviation summation, electrical network frequency difference and the Region control deviation of controlled area that comprises wind-powered electricity generation carried out control performance evaluation, if Fig. 1 and 2 Fig. 1 is to carrying out the block diagram of control performance evaluation and the control area containing wind-powered electricity generation not being carried out, as shown in the block diagram of control performance evaluation, carry out control performance evaluation by following evaluation method containing the control area of wind-powered electricity generation:
A, exert oneself and exceed plan generating when wind-powered electricity generation is actual:
A1, for the controlled area that comprises wind-powered electricity generation: meet lower two formulas, it is qualified to control, otherwise defective;
A2, for not containing wind-powered electricity generation controlled area, meet lower two formulas control qualified, otherwise defective;
B, exert oneself lower than plan generating when wind-powered electricity generation is actual:
B1, for the controlled area that comprises wind-powered electricity generation: meet lower two formulas control qualified, otherwise defective;
B2, for not containing wind-powered electricity generation controlled area, meet lower two formulas control qualified, otherwise defective;
In formula,
for regulating division of responsibiltiy coefficient, Δ f is mains frequency deviation, ACE
ifor the control deviation of control area, WCE is wind-powered electricity generation control total deviation, N is ACE, the WCE in control performance evaluation cycle, the number of samples of Δ f, and ε is the root-mean-square value of the 1min mean value of the deviation of interior interconnected network actual frequency of 1 year period and standard frequency (being 50Hz in the present embodiment); B
sfor the total frequency departure coefficient B of interconnected network
s=Σ B
i; B
ifor the frequency departure coefficient of the each control area of described interconnected network.The frequency departure coefficient of each control area can adopt fixed value, annual setting once, and the analysis of the frequency response characteristic when to the disturbance for several times of control area system peak period, gets its mean value and sets.
Finally should be noted that: above embodiment is only for illustrating the application's technical scheme but not restriction to its protection range; although the application is had been described in detail with reference to above-described embodiment; those of ordinary skill in the field are to be understood that: those skilled in the art still can carry out all changes, revise or be equal to replacement to the embodiment of application after reading the application; but these change, revise or be equal to replacement, within the claim protection range all awaiting the reply in application.
Claims (7)
1. wind-powered electricity generation is concentrated and an interconnected network automatic generation control method of evaluating performance off the net, it is characterized in that: said method comprising the steps of:
I, determine that the wind-powered electricity generation fluctuation of the each control area of described interconnected network in next dispatching cycle regulates division of responsibiltiy coefficient
II, determine the wind-powered electricity generation control total deviation WCE in the described interconnected network automatic generation control cycle;
III, determine mains frequency deviation delta f in each control cycle and the control deviation ACE of control area
i;
IV, judge that whether the control performance of each control area is qualified.
2. the method for claim 1, is characterized in that: described step I comprises the following steps:
S101, obtain the automatic-generation-control unit that participates in stabilizing wind-powered electricity generation power network fluctuation power in described interconnected network;
S102, prediction respectively comprise wind-powered electricity generation in the control area of wind-powered electricity generation and depart from error burst ± Δ P that its plan is exerted oneself
i w ';
S103, the wind-powered electricity generation of determining described interconnected network depart from maximum output error ± Δ P of its plan gross capability
w=Σ Δ P
i w ';
S104, according to described maximum output error+Δ P
w, each automatic-generation-control unit of stabilizing wind-electricity integration fluctuating power regulates unit cost C for subsequent use
iwith constraints one, determine the each automatic-generation-control unit regulatory demand amount that participates in stabilizing wind-electricity integration fluctuating power
make described interconnected network participate in stabilizing the automatic-generation-control unit adjustment cost sum of wind-electricity integration fluctuating power
minimum;
S105, exceed maximum output error+Δ P that exerts oneself of plan for wind-powered electricity generation
w, determine that described interconnected network participates in stabilizing each automatic-generation-control unit adjusting division of responsibiltiy coefficient of wind-electricity integration fluctuating power
S106, acquisition wind-powered electricity generation are exerted oneself and are exceeded the wind-powered electricity generation fluctuation adjusting division of responsibiltiy coefficient of each control area while plan
S107, according to described maximum output error-Δ P
w, each automatic-generation-control unit of stabilizing wind-electricity integration fluctuating power regulates unit cost C for subsequent use
iwith constraints two, determine the each automatic-generation-control unit regulatory demand amount that participates in stabilizing wind-electricity integration fluctuating power
make described interconnected network participate in stabilizing the automatic-generation-control unit adjustment cost sum of wind-electricity integration fluctuating power
minimum;
S108, the maximum output error-Δ P that exerts oneself planning for wind-powered electricity generation deficiency
w, determine that each automatic-generation-control unit that described interconnected network participates in for stabilizing wind-powered electricity generation fluctuation regulates division of responsibiltiy coefficient
When S109, the plan of acquisition wind-powered electricity generation undercapacity, the wind-powered electricity generation fluctuation of each control area regulates division of responsibiltiy coefficient
3. method as claimed in claim 2, is characterized in that: described constraints one comprises:
A、
B、
C、
In formula, P
i agcfor automatic-generation-control unit i is at the power initial value that participates in stabilizing before wind-powered electricity generation fluctuation regulates;
for the demand of the downward adjusting of wind-powered electricity generation fluctuation is stabilized in automatic-generation-control unit i participation;
for automatic-generation-control unit i minimum output limit value;
for the downward regulations speed of automatic-generation-control unit i; T is the dispatching of power netwoks cycle;
the vector forming for be used for the demand of the downward adjusting of stabilizing wind-powered electricity generation fluctuating power by the each automatic-generation-control unit of interconnected network;
the vector forming for be used for the demand of the downward adjusting of stabilizing load fluctuation power by the each automatic-generation-control unit of interconnected network; S is that automatic-generation-control unit regulates the sensitivity to interconnected network branch of a network trend;
for interconnected network automatic-generation-control unit participates in stabilizing wind-powered electricity generation and the front branch of a network trend of load fluctuation adjusting; P
tiefor interconnected network branch of a network trend safety limit; γ is interconnected network branch of a network trend margin of safety; N is the automatic-generation-control unit number that participates in stabilizing wind-powered electricity generation fluctuation.
4. method as claimed in claim 2, is characterized in that: described constraints two comprises:
A、
B、
C、
In formula, P
i agcfor automatic-generation-control unit i participates in stabilizing the power initial value before wind-powered electricity generation fluctuation regulates,
for automatic-generation-control unit i participates in stabilizing the demand upwards regulating of wind-powered electricity generation fluctuation;
for the high output limit value of automatic-generation-control unit i,
for the upwards regulations speed of automatic-generation-control unit i; T is the dispatching of power netwoks cycle;
for the vector being formed for stabilizing the demand upwards regulating of wind-powered electricity generation fluctuating power by the each automatic-generation-control unit of interconnected network;
for the vector being formed for stabilizing the demand upwards regulating of load fluctuation power by the each automatic-generation-control unit of interconnected network; S is that automatic-generation-control unit regulates the sensitivity to interconnected network branch of a network trend;
for interconnected network automatic-generation-control unit participates in stabilizing wind-powered electricity generation and the front branch of a network trend of load fluctuation adjusting; P
tiefor interconnected network branch of a network trend safety limit, γ is interconnected network branch of a network trend margin of safety; N is the automatic-generation-control unit number that participates in stabilizing wind-powered electricity generation fluctuation.
5. the method for claim 1, is characterized in that: described Step II comprises the following steps:
S201, determine the wind-powered electricity generation control deviation WCE of the each control area in the described interconnected network automatic generation control cycle
i=P
i wa-P
i ws;
In formula, P
i wafor actual the exerting oneself of wind-powered electricity generation of the control area i at current control cycle, P
i wsfor the wind-powered electricity generation plan of the control area i at current control cycle is exerted oneself;
S202, determine the wind-powered electricity generation control total deviation in the described interconnected network automatic generation control cycle
In formula, m is the number of described interconnected network containing the control area of wind-powered electricity generation.
6. the method for claim 1, is characterized in that: in described Step II I, determine the control deviation ACE of the control area in each control cycle
i=B
iΔ f+ (Σ P
ti-Σ I
0i);
In formula, Δ f=f-f
0, f is the mains frequency actual measured value in current control cycle, f
0for nominal frequency;
B
ifor the frequency deviation of control area i, Σ P
tifor the actual amount measured value sum of all Tie line Power of control area i, interconnection meter Σ I
0ifor the transaction plan sum of control area i and outer controlled area.
7. the method for claim 1, is characterized in that: in described step IV, carry out control performance evaluation by following evaluation method:
A, exert oneself and exceed plan generating when wind-powered electricity generation is actual:
A1, for the control area that comprises wind-powered electricity generation, meet following formula, it is qualified to control, otherwise defective;
A2, for not containing wind-powered electricity generation control area, meet following formula control qualified, otherwise defective;
B, exert oneself lower than plan generating when wind-powered electricity generation is actual:
B1, for the control area that comprises wind-powered electricity generation, meet following formula control qualified, otherwise defective;
B2, for not containing wind-powered electricity generation control area, meet following formula control qualified, otherwise defective;
In formula,
for regulating division of responsibiltiy coefficient, Δ f is mains frequency deviation, ACE
ifor the control deviation of control area, WCE is wind-powered electricity generation control total deviation, and N is ACE, the WCE in control performance evaluation cycle, the number of samples of Δ f, and ε is the root-mean-square value of the 1min mean value of the deviation of interior interconnected network actual frequency of 1 year period and standard frequency, B
sfor the total frequency departure coefficient B of described interconnected network
s=Σ B
i, B
ifor the frequency departure coefficient of the each control area of described interconnected network.
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