CN104362617B - The distribution method of regional power grid control zone spare capacity - Google Patents

The distribution method of regional power grid control zone spare capacity Download PDF

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CN104362617B
CN104362617B CN201410557587.6A CN201410557587A CN104362617B CN 104362617 B CN104362617 B CN 104362617B CN 201410557587 A CN201410557587 A CN 201410557587A CN 104362617 B CN104362617 B CN 104362617B
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control zone
standby
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risks
reserve
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CN104362617A (en
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周良才
刘林林
史济全
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East China Grid Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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    • G06—COMPUTING; CALCULATING OR COUNTING
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    • G06Q50/06—Energy or water supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/003—Load forecast, e.g. methods or systems for forecasting future load demand

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Abstract

Embodiments provide the distribution method of a kind of regional power grid control zone spare capacity, comprise the following steps: be multiplied by the first proportionality coefficient according to the largest anticipated load of this control zone and obtain the internal risks of this control zone and reserve standby；Deduct the described internal risks of all control zones in this electrical network and reserve standby sum according to the whole network is always standby and obtain a difference, and be multiplied by the second proportionality coefficient according to this difference and obtain the Outer risks of this control zone and reserve standby；Outer risks according to control zone of being obstructed reserve standby, maximum can transmission power, that interconnection unscheduled power and the 3rd proportionality coefficient obtain the superposition without control zone of being obstructed is standby；Reserve standby, Outer risks in conjunction with the described internal risks of this control zone and reserve standby and the distribution of this control zone of the standby acquisition of superposition standby total amount.The invention has the beneficial effects as follows: propose a kind of science more, rationally, meet the spare capacity of the reality distribution method in the dimension of region, it is ensured that the fast quick-recovery of network system frequency.

Description

The distribution method of regional power grid control zone spare capacity
Technical field
The present invention relates to field of power, the distribution method of especially a kind of regional power grid control zone spare capacity.
Background technology
Why power system needs spare capacity, and the feature mainly produced by power industry and the lack of uniformity of user power utilization determine.The production of electric energy, conveying and consumption almost carry out simultaneously, electric energy can not mass storage, the electricity consumption of user also has the feature such as randomness and lack of uniformity.So, electrical network very likely stand equipment stop transport at random, the disturbance such as load fluctuation.In order to ensure the safe and reliable operation of power system, it is ensured that frequency is in the scope of regulation, it is to avoid the even large-area power-cuts of extensive cascading failure occurs, it is necessary to arrange enough operation reserve capacities.Specifically, East China is typical large receiving-end grid, and outside district, incoming call exceedes the 10% of East China load.If there is the accidents such as DC bipolar block, then system frequency can be brought great impact, even up to beyond the scope that generating set frequency anomaly allows.Therefore, sufficient standby total amount and rational standby distribution, could control system low-limit frequency and frequency retrieval time in qualified scope, the ability of repeatedly accident disturbance is resisted in raising.
Run standby referring to and ensure electric power netting safe running, in order to balance the power shortage that tracking load prediction deviation, unit tripping or power grid accident etc. cause.Run and standby include spinning reserve and load is standby.Reasonably configure reserve capacity of power grid, be the basic assurance of power grid security, high-quality operation.
Each electrical network is different to running standby regulation, such as North America electric reliability committee (NERC) proposes the concept that frequency modulation is standby, New England's Power Pool (NEPOOL) and North America PJM Utilities Electric Co. and also spare capacity is finely divided and plans.East China Power Grid is in conjunction with the practical experience of China's " power system technology directive/guide " and daily operation of power networks, it is as follows that regulation runs standby total amount: standby total amount should be not less than the maximum single-machine capacity of tracking and the maximum DC bipolar rated power sum that East China Power Grid is run, wherein spinning reserve capacity is not less than the 2% of the whole network prediction maximum load, and reserve capacity for load variation in power deducts East China the whole network spinning reserve capacity equal to the whole network operation reserve capacity.The operation of power networks that regional power grid company and Utilities Electric Co. of provinces and cities must reserve requirement in dispatching of power netwoks running is standby, and the feature reasonable layout according to respective electrical network.And according to the principle of " United Dispatching, administration by different levels ", standby unified arrangement, point province's configuration, Centralized Monitoring, the whole network are shared.After the standby total amount of operation of power networks is determined, how to carry out reasonable distribution key issue especially in each control zone of regional power grid.Standby distribution should take into full account safety, economy, feasibility, and the actual characteristic in conjunction with electrical network is determined.The standby distribution of traditional operation is usually to be estimated according to control zone the factors such as peak load, control zone total installation of generating capacity, the maximum single-machine capacity in control zone to draw after accounting for the whole network ratio weighted average again according to each factor.Under traditional approach, the standby allocation proportion in each control zone whole year is changeless, it does not have considers the factors such as control zone load variations, actual adjustable spare capacity, does not more account for the practical situation such as power system operating mode and electricity grid network constraint.
Summary of the invention
It is an object of the invention to provide a kind of distribution method considering that the power grid control district of the practical situations such as control zone load variations, actual adjustable spare capacity, power system operating mode, power system operating mode and electricity grid network constraint runs standby total amount.
In order to achieve the above object, the invention provides the distribution method of a kind of regional power grid control zone spare capacity, comprise the following steps:
Largest anticipated load according to this control zone is multiplied by the first proportionality coefficient and obtains the internal risks of this control zone and reserve standby, and described first proportionality coefficient is be more than or equal to 2%, and less than or equal to 100%；
Deduct the described internal risks of all control zones in this electrical network and reserve standby sum according to the whole network is always standby and obtain a difference, and be multiplied by the second proportionality coefficient according to this difference and obtain the Outer risks of this control zone and reserve standby, described second proportionality coefficient is the adjustable adjustable sum of exerting oneself of self installing exerted oneself divided by control zones all in this electrical network of self installation of this control zone；
Described internal risks in conjunction with this control zone reserves the standby standby total amount reserving the distribution of this control zone of standby acquisition with Outer risks.
Further, adjustable the exerting oneself of self installing of described control zone deducts the difference after maintenance capacity, disabled capacity successively for maximum installed capacity.
Further, reserve standby and Outer risks according to the described internal risks of this control zone and reserve standby total amount that is standby and that obtain the distribution of this control zone.
Further, distribution standby total amount in described control zone is:
Wherein, PiFor the standby total amount of i-th control zone distribution, m%*LimaxReserving standby for described i-th control zone internal risks, m% is described first proportionality coefficient, LimaxFor the largest anticipated load of i-th control zone,Outer risks for described i-th control zone is reserved standby, PAlwaysAlways standby for the whole network, n is control zone sum, GiSelf installation for i-th control zone adjustable is exerted oneself,For described second proportionality coefficient.
Further, described first proportionality coefficient is 2%.
Present invention also offers the distribution method of a kind of regional power grid control zone spare capacity, comprise the following steps:
Largest anticipated load according to this control zone is multiplied by the first proportionality coefficient and obtains the internal risks of this control zone and reserve standby, and described first proportionality coefficient is be more than or equal to 2%, and less than or equal to 100%；
Deduct the described internal risks of all control zones in this electrical network and reserve standby sum according to the whole network is always standby and obtain a difference, and be multiplied by the second proportionality coefficient according to this difference and obtain the Outer risks of this control zone and reserve standby, described second proportionality coefficient is the adjustable adjustable sum of exerting oneself of self installing exerted oneself divided by control zones all in this electrical network of self installation of this control zone；
Described control zone includes existing the standby control zone and without being obstructed control zone of being obstructed of being obstructed, Outer risks according to described control zone of being obstructed is reserved and standby, maximum transmission power and interconnection unscheduled power can be obtained it and be obstructed standby, obtaining without the superposition of control zone of being obstructed standby according to described standby the 3rd proportionality coefficient that is multiplied by that is obstructed, described 3rd proportionality coefficient is that a nothing is obstructed that self installation of control zone is adjustable exerts oneself divided by the institute's self adjustable sum that is that exert oneself of installation with or without control zone of being obstructed；
Reserve standby, Outer risks in conjunction with the described internal risks of this control zone and reserve standby and the distribution of this control zone of the standby acquisition of superposition standby total amount.
Further, adjustable the exerting oneself of self installing of described control zone deducts the difference after maintenance capacity, disabled capacity successively for maximum installed capacity.
Further, reserve standby and Outer risks according to the described internal risks of this control zone and reserve standby total amount that is standby and that obtain the distribution of this control zone.
Further, distribution standby total amount in described control zone is:
Wherein, kth control zone be described in be obstructed control zone, it is obstructed and standby is:
I-th is standby without control zone superposition of being obstructed is:
P k r × G i / Σ i = 1 , i ≠ k n G i ,
For described 3rd proportionality coefficient, Fkmax, FkrFor interconnection is maximum can transmission power, interconnection unscheduled power.
Further, described first proportionality coefficient is 2%.
Embodiments provide the distribution method of a kind of regional power grid control zone spare capacity, the deficiency of standby allocation strategy is run for tradition, take into full account factors such as causing the classification of risks of power shortage, control zone actual power ability, electricity grid network constraint, propose a kind of science more, rationally, meet the spare capacity of the reality distribution method in the dimension of region, it is ensured that the fast quick-recovery of network system frequency.
Accompanying drawing explanation
The logic chart of the distribution method of the regional power grid control zone spare capacity that Fig. 1 provides for the embodiment of the present invention；
The logic chart of distribution method in spare capacity with network constraint time domain power grid control district spare capacity that Fig. 2 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with schematic diagram, the specific embodiment of the present invention is described in more detail.According to description below and claims, advantages and features of the invention will be apparent from.It should be noted that, accompanying drawing all adopts the form simplified very much and all uses non-ratio accurately, only in order to convenience, the purpose aiding in illustrating the embodiment of the present invention lucidly.
Operation of power networks is standby to be mainly used in taking precautions against owing to unit tripping, load expected deviation and district's external power such as lose at the power shortage caused.For single control zone: internal unit tripping, this control zone load expected deviation belong to internal risks, should be undertaken by control zone self, and the power shortage that outside district, DC Line Fault or transregional power transmission extra-high-voltage alternating current fault cause belongs to Outer risks, should by each control zone shared.Therefore the standby total amount that each control zone (provinces and cities and directly manage on behalf of another) undertake should be reply internal risks with Outer risks needed for standby sum.
As it is shown in figure 1, embodiments provide the distribution method of a kind of regional power grid control zone spare capacity, comprise the following steps:
Largest anticipated load according to this control zone is multiplied by the first proportionality coefficient and obtains internal risks and reserves standby, and described first proportionality coefficient is be more than or equal to 2%, and less than or equal to 100%；
Deduct the described internal risks of all control zones in this electrical network and reserve standby sum according to the whole network is always standby and obtain a difference, and be multiplied by the second proportionality coefficient according to this difference and obtain the Outer risks of this control zone and reserve standby, described second proportionality coefficient is the adjustable adjustable sum of exerting oneself of self installing exerted oneself divided by control zones all in this electrical network of self installation of this control zone；
Described internal risks in conjunction with this control zone reserves the standby standby total amount reserving the distribution of this control zone of standby acquisition with Outer risks.
Adjustable the exerting oneself of self installing of described control zone deducts the difference after maintenance capacity, disabled capacity successively for maximum installed capacity.
Described internal risks according to this control zone is reserved standby and Outer risks and is reserved standby total amount that is standby and that obtain the distribution of this control zone.
Standby total amount is distributed in described control zone:
Wherein, PiFor the standby total amount of i-th control zone distribution, m%*LimaxReserving standby for described i-th control zone internal risks, m% is described first proportionality coefficient, LimaxFor the largest anticipated load of i-th control zone,Outer risks for described i-th control zone is reserved standby, reserves standby for Outer risks, by spare shared principle, undertakes according to the ratio of the maximum tunability in control zone, PAlwaysAlways standby for the whole network, n is control zone sum, GiAdjustable exerting oneself for self installation of i-th control zone, representative is the generating capacity that can call of control zone reality,For described second proportionality coefficient.
In the present embodiment, described first proportionality coefficient is preferably 2%.
The acquisition of the standby total amount of above-mentioned control zone distribution does not consider the situation of network constraint, namely when being left out network constraint, the standby total amount of control zone distribution is made up of two parts, namely undertakes reserved standby (internal risks is reserved standby) of internal risks responsibility and undertakes reserved standby (Outer risks is reserved standby) sum of Outer risks obligation.
And in practice for Outer risks part, it being often subject to the constraint of dominant eigenvalues limit, the standby of control zone can not support the whole network completely.Because there is network constraint, so there is spare capacity to recall the problem being obstructed, now, the distribution method of described regional power grid control zone spare capacity is further comprising the steps of:
Described control zone includes existing the standby control zone and without being obstructed control zone of being obstructed of being obstructed, Outer risks according to described control zone of being obstructed is reserved and standby, maximum transmission power and interconnection unscheduled power can be obtained it and be obstructed standby, obtaining without the superposition of control zone of being obstructed standby according to described standby the 3rd proportionality coefficient that is multiplied by that is obstructed, described 3rd proportionality coefficient is that a nothing is obstructed that self installation of control zone is adjustable exerts oneself divided by the institute's self adjustable sum that is that exert oneself of installation with or without control zone of being obstructed；
Reserve standby, Outer risks in conjunction with the described internal risks of this control zone and reserve standby and the distribution of this control zone of the standby acquisition of superposition standby total amount.Standby total amount is distributed in described control zone:
Wherein, kth control zone be described in be obstructed control zone, it is obstructed and standby is:
For other without being obstructed control zone, be obstructed and standby should again redistribute by maximum adjustable exerting oneself in kth control zone, then i-th is standby without control zone of being obstructed (i is not equal to k) superposition is:
P k r × G i / Σ i = 1 , i ≠ k n G i ,
For described 3rd proportionality coefficient, FkmaxAnd FkrRespectively interconnection is maximum can transmission power and interconnection unscheduled power.
It can be seen that consider in network constraint situation, control zone is shared spare capacity and is made up of three parts, namely undertake internal risks responsibility reserve standby, undertake Outer risks obligation and reserve other control zone standby and superposition and be obstructed standby (superposition is standby), namely, when considering network constraint, the distribution method of regional power grid control zone spare capacity includes step as shown in Figure 2.
The above-mentioned distribution method not considering network constraint and consideration network constraint time domain power grid control district spare capacity of basic of distribution carrying out regional power grid operation reserve capacity control zone in East China Power Grid peak summer in 2013 expectation maximum load mode obtains related data as shown in table 1.
Table 1
As shown in table 1, (related data is with reference to year mode data for related data, non-grid truthful data) unit be ten thousand kilowatts, wherein: the whole network is always standby by 7,400,000 kilowatts of considerations (giving 1,000,000 kilowatts of the maximum unit of direct current maximum delivery power 6,400,000 kilowatts+one under summer means again).When considering network constraint, being obstructed of In Fujian Province is standby for negative standby, it is specially-38.42 ten thousand kilowatts, distribution method according to regional power grid control zone provided by the invention spare capacity, Shanghai, Jiangsu, Zhejiang, Anhui can be obtained and directly manage on behalf of another (in the present embodiment, be the region that East China Power Grid is directly managed on behalf of another) standby respectively 4.4,15.46,9.37,5.32 and 3.87 ten thousand kilowatts of superposition, and then can obtain and share standby total amount accordingly.
To sum up, embodiments provide a kind of regional power grid control zone spare capacity distribution method in the dimension of region, will result in the risk of power shortage and be divided into internal risks and Outer risks two class, take into full account the standby responsibility in each control zone and obligation, principle according to " internal risks undertakes self; Outer risks the whole network shared ", set the standby total amount that each control zone undertakes should be reply internal risks with Outer risks needed for standby sum.In addition, consider the actual standby deficiency in control zone or the standby situation that cannot effectively support the whole network because of reasons such as network constraints, reallocate to control zone is standby, with the adjustable maximum installed capacity of replacement of exerting oneself of reality, take into full account control zone be subject to TV university little with the factor of being obstructed on standby impact, finally give standby allocation strategy, for instructing each control zone to run standby foundation as minimum reservation.
Embodiments provide the distribution method of a kind of regional power grid control zone spare capacity, the deficiency of standby allocation strategy is run for tradition, take into full account factors such as causing the classification of risks of power shortage, control zone actual power ability, electricity grid network constraint, propose a kind of science more, rationally, meet the spare capacity of the reality distribution method in the dimension of region, it is ensured that the fast quick-recovery of network system frequency.
Above are only the preferred embodiments of the present invention, the present invention is not played any restriction effect.Any person of ordinary skill in the field; without departing from the scope of technical scheme; the technical scheme that the invention discloses and technology contents are made the variations such as any type of equivalent replacement or amendment; all belong to the content without departing from technical scheme, still fall within protection scope of the present invention.

Claims (5)

1. the distribution method of a regional power grid control zone spare capacity, it is characterised in that the distribution method of described regional power grid control zone spare capacity comprises the following steps:
Largest anticipated load according to this control zone is multiplied by the first proportionality coefficient and obtains the internal risks of this control zone and reserve standby, and described first proportionality coefficient is be more than or equal to 2%, and less than or equal to 100%；
Deduct the described internal risks of all control zones in this electrical network and reserve standby sum according to the whole network is always standby and obtain a difference, and be multiplied by the second proportionality coefficient according to this difference and obtain the Outer risks of this control zone and reserve standby, described second proportionality coefficient is the adjustable adjustable sum of exerting oneself of self installing exerted oneself divided by control zones all in this electrical network of self installation of this control zone；
Described control zone includes existing the standby control zone and without being obstructed control zone of being obstructed of being obstructed, Outer risks according to described control zone of being obstructed is reserved and standby, maximum transmission power and interconnection unscheduled power can be obtained it and be obstructed standby, obtaining without the superposition of control zone of being obstructed standby according to described standby the 3rd proportionality coefficient that is multiplied by that is obstructed, described 3rd proportionality coefficient is that a nothing is obstructed that self installation of control zone is adjustable exerts oneself divided by the institute's self adjustable sum that is that exert oneself of installation with or without control zone of being obstructed；
Reserve standby, Outer risks in conjunction with the described internal risks of this control zone and reserve standby and the distribution of this control zone of the standby acquisition of superposition standby total amount.
2. the distribution method of regional power grid control zone as claimed in claim 1 spare capacity, it is characterised in that adjustable the exerting oneself of self installing of described control zone deducts the difference after maintenance capacity, disabled capacity successively for maximum installed capacity.
3. the distribution method of regional power grid control zone as claimed in claim 2 spare capacity, it is characterised in that reserve standby and Outer risks according to the described internal risks of this control zone and reserve standby total amount that is standby and that obtain the distribution of this control zone.
4. the distribution method of regional power grid control zone as claimed in claim 3 spare capacity, it is characterised in that described control zone is distributed standby total amount and is:
Wherein, kth control zone be described in be obstructed control zone, it is obstructed and standby is:
I-th is standby without control zone superposition of being obstructed is:
P k r × G i / Σ i = 1 , i ≠ k n G i ,
For described 3rd proportionality coefficient, Fkmax, FkrFor interconnection is maximum can transmission power, interconnection unscheduled power.
5. the distribution method of regional power grid control zone as claimed in claim 4 spare capacity, it is characterised in that described first proportionality coefficient is 2%.
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