CN103226650A - Processing method of power grid computational data based on topology analysis - Google Patents

Abstract

The invention discloses a processing method of power grid computational data based on topology analysis. The processing method comprises the steps that (1), a power supply area is generated; (2), the power supply area is folded and unfolded; (3), an equivalent load of the power supply area is acquired; and (4) the equivalent load is allocated to each load point in the power supply area. According to the processing method, the original mode that the computational data is maintained separately is changed to a mode that respective computational data is maintained on one set of data, so that data splicing and integration are eliminated, and the maximization of the maintenance, the management, the quality and the service efficiency of the computational data is achieved.

Description

A kind of disposal route of the electrical network computational data based on topological analysis

Technical field

The invention belongs to power transmission network and power distribution network technical field, be specifically related to a kind of disposal route of the electrical network computational data based on topological analysis.

Background technology

According to the requirement of " power system safety and stability computing technique standard ", the network connection of major network computational data is simplified should follow following principle: 1) the research network generally can only keep the network connection of two step voltages, and low voltage electromagnetic looped network circuit should keep; 2) small power supply in the secondary network that is simplified can be offset with this locality load in principle, and the small power supply bigger to systematic influence can be kept as required.The major network computational data generally all is to defer to the combined calculation data that " power system safety and stability computing technique standard " forms synchronous interconnected network.When the electrical network of needs research certain areas, just need in the computational data to add the lower electric network data of these regional electric pressures, as the 110kV of regional dispatching and the electrical network computational data of following electric pressure.

Economize and transfer when method of operation calculated load data are received money, obtain load and the generating that its scheduling factory stands from regional dispatching, according to the topological structure of regional dispatching electrical network, calculate again by simple plus-minus, form the duty value that waits of power supply transformer station, with the electrical network of simulation regional dispatching.The mesolow electrical network of the general only care of regional dispatching oneself scheduling, electrical network computational data that need this area is detailed is incorporated province into and is transferred the combined calculation data that issue, and could form the computational data that oneself needs; Fall for load cyclization check calculating if relate to transformer station's cyclization in short-term of two area power grids, also need to splice relevant regional data dispatching, it is complicated more that task also can become.

By to economizing the analysis of net and area power grid computational data forming process, can find receipts money arrangement from load, to the splicing of electrical network computational data, each link workload is all very big; Along with the develop rapidly of electrical network, to the raising that operation of power networks requires, the changes of operating modes complexity, the computational analysis degree that becomes more meticulous is also more and more higher to electrical network, and the frequency of Data Update is also more frequent, and the workload that forms computational data is also increasing.Unit is many, personnel are many, versions of data is many because the data maintenance integration relates in addition, and data management is difficult.In today of computer technology and computing power develop rapidly, form the most of the time that computational data has expended method of operation evaluation work, more and more become the key that the restriction work efficiency improves, more and more can not satisfy the demand that mode is calculated personnel.

Summary of the invention

Deficiency at present electrical network computational data maintenance process existence, the present invention proposes a kind of disposal route of the electrical network computational data based on topological analysis, can and economize adjusting data with the regional dispatching data and incorporate a cover computational data, by the network topology analysis, form the power supply area of major network Load Substation, utilize this grouping information of power supply area to realize that the equivalence load of major network transformer station calculates again, adjust and check regional transformer station load, fold and expansion power supply area data, realized providing different computational datas for the various computing demand; This cover disposal route has solved the major network load in collaborative mode and has received the money problem, has reduced the difficulty of computational data management, solves the problem that major network and area power grid form the computational data work efficiency.

The invention provides a kind of disposal route of the electrical network computational data based on topological analysis, its improvements are that described method comprises the steps:

(1) generates power supply area;

(2) folding and expansion power supply area;

(3) obtain the duty value that waits of power supply area;

(4) will wait duty value to share each load point in the power supply area.

Wherein, the step of the described generation power supply area of step (1) comprises:

1) the power supply buses section (node) of needs equivalence is carried out topological analysis;

2), with the node of this electric UNICOM of bus section, busbar section, and this power supply area numbering is set on these nodes in the search method of operation from the power supply buses section;

When 3) searching for transformer,, then forbid this node is added power supply area, and no longer this node is searched for greater than the power supply buses electric pressure as if transformer high-voltage side electric pressure, the major network tie point calculates and adds one.

Wherein, step (2) step folding and the expansion power supply area comprises:

1) power supply area that participates in calculating is launched operation: the non-invalid equipment of power supply area is arranged to effective status, waits duty value to be arranged to folded state, do not participate in calculating, comprised the whole electric network datas of power supply area in the computational data;

2) power supply area of ignoring is carried out folding operation: the effective equipment of power supply area is arranged to folded state, does not participate in calculating, wait duty value to be arranged to effective status, use in the computational data by equivalent load simulation power supply area;

Wherein, step (3) calculate by trend or the mode of statistics obtain power supply area etc. duty value.

Wherein, calculating the step that waits duty value of obtaining power supply area by trend comprises:

1) the electrical network computational data of extraction power supply area is a balance node with power supply transformer station supply node, forms the trend computational data;

2) balance node voltage is set to the magnitude of voltage of this node expectation, as 1pu;

3) start trend and calculate, obtain the equilibrator duty values such as conduct of exerting oneself;

The power supply area of being correlated with all can be exported in the equivalent computational data, calculate by a trend and obtain whole duty value of Denging.

4) judge whether trend restrains, as if not restraining, then the rationality that load is arranged is checked in prompting, the rationality of circuit and transformer parameter in the inspection power supply area.

Wherein, the mode equivalence of loading by statistics is calculated as: as the active power that waits duty value, (the having the user to determine) power factor according to expection calculates equivalent reactive power of loading again with the difference of power supply area load and generating statistical value.

Wherein, step (4) step that will wait duty value to share each load point in the power supply area comprises:

1) according to equivalent point delivery P _SupplierCalculated load is adjusted COEFFICIENT K, and its expression formula is:

$K=\frac{P_{\mathrm{supplier}}-\mathrm{\Σ}{P}_{\mathrm{gload}}+{\mathrm{\ΣP}}_{\mathrm{gen}}}{{\mathrm{\ΣP}}_{\mathrm{load}}};$

In the formula, P _GloadBe station service active power; P _GenBe generator active power; P _LoadBe load;

2) active power and the reactive power of all loads in the power supply area are all amplified K doubly.

Compared with the prior art, beneficial effect of the present invention is:

1. the present invention is by the computational data of originally safeguarding a cover oneself separately, become and on a sets of data, safeguard the computational data of part separately, eliminate data splicing, made things convenient for the use of data, realized the maximization of computational data maintenance, management, quality and service efficiency;

2. the present invention can become integrated work with check with the arrangement of the area power grid method of operation, the receipts money that province transfers load;

3. the present invention makes computational data setup time drop to the shortest under the prerequisite that meets computational data codes and standards and current custom;

4. the present invention falls for the transformer station's cyclization in short-term that relates to two area power grids and provides the active data preparation method for load cyclization check calculating;

5. the present invention selectively considers area power grid by mode folding or that launch, makes the user select electric network model on a sets of data, provides means flexibly for analyzing area power grid to the influence of major network;

6. the present invention adjusts and checks the method for operation by the power supply area that topological analysis dynamically forms, and makes method of operation arrangement rationally more intuitively convenient.

Description of drawings

Fig. 1 is the process flow diagram of the disposal route of the electrical network computational data based on topological analysis provided by the invention.

Embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.

The disposal route of present embodiment proposes a kind of electrical network computational data based on topological analysis, its process flow diagram specifically comprises the steps: as shown in Figure 1

(1) generates power supply area

Its step comprises:

1) will the power power supply buses numbering and the segment number of transformer station numbered as power supply area;

2), with the node of the electric UNICOM of bus, and this power supply area numbering is set on these nodes in the search method of operation from the power supply buses section;

When 3) searching for transformer,, then forbid this node is added power supply area, and no longer this node is searched for greater than the power supply buses electric pressure as if transformer high-voltage side electric pressure, the major network tie point calculates and adds one;

Only the power supply area that links to each other with major network by power supply buses just allows to carry out and folds, launches and calculate equivalent load operation.

(2) folding and expansion power supply area

When not needing to consider the computational data of certain power supply area, need the equipment that this power supply area is whole to stash, use this power supply area of equivalent load simulation; When the needs detailed consideration, can allow this power supply area electric network data all participate in calculating; The data of power supply area can " fold " and " expansion " as required just as yunna spiraea.Just can on a sets of data, realize that with launching to operate this will simplify electrical network computational data maintenance workload greatly for the various computing demand provides different computational datas by folding.

Its step comprises folding or launches:

1) launches operation: the equipment of power supply area non-invalid (effective status and folded state) is arranged to effective status, waits duty value to be arranged to folded state, use detailed electric network data to simulate power supply area in the computational data.

2) folding operation: the effective equipment of power supply area is arranged to folded state, waits duty value to be arranged to effective status, use by the characteristic of equivalent load simulation power supply area electrical network in the computational data.

The invalid equipment that does not participate in calculating is ignored in folding and expansion operation.

(3) obtain the duty value that waits of power supply area

By the electric network data in the power supply area is used trend calculate or the method for statistics obtain the power supply buses section etc. duty value.

The step of using trend to calculate duty values such as obtaining comprises:

1) electric network data of extraction power supply area is a balance node with major network power supply transformer station power supply buses section, forms the trend computational data;

2) setting of balance node voltage defaults to 1pu, and the idle scope of exerting oneself of equilibrator is set to-999 to 999Mvar, to guarantee the correctness of equilibrator calculation of tidal current;

3) use the trend program to calculate, if the equilibrator duty values such as conduct of exerting oneself are obtained in convergence;

The power supply area of being correlated with all can be exported in the equivalent computational data, can obtain all relevant duty value that waits by once calculating like this, improve the equivalent efficient of calculating.

4) judge whether trend restrains, as if not restraining, then the rationality that load is arranged is checked in prompting, the rationality of circuit and transformer parameter in the inspection power supply area.

Use that statistical method is obtained and wait duty value: with the difference of power supply area load and generating statistical value as etc. the active power of duty value, calculate etc. the reactive power of duty value again according to the power factor (as 0.95) of expecting.

Calculate the method for duty values such as obtaining with trend and compare, this method efficient height, speed is fast, and owing to ignoring network loss and the idle reasons such as error of estimation, computational data launches and can there be certain difference in folded state neap stream result calculated.

(4) etc. duty value is shared each load point in the power supply area

According to the load of major network transformer station prediction or the load of SCADA collection, under the situation of considering power supply area self power supply, with each load point that waits duty value to share this transformer station's power supply area, the approximate calculation method of employing is as follows:

A) according to equivalent point delivery P _SupplierCalculated load is adjusted COEFFICIENT K, and its expression formula is:

$K=\frac{P_{\mathrm{supplier}}-\mathrm{\Σ}{P}_{\mathrm{gload}}+{\mathrm{\ΣP}}_{\mathrm{gen}}}{{\mathrm{\ΣP}}_{\mathrm{load}}};$

In the formula, P _GloadFor station service is gained merit; P _GenExert oneself for generator is meritorious; P _LoadBe load;

B) the meritorious and idle of load value with load point in all power supply areas all amplifies K doubly;

Because power supply area comprises that electric pressure is lower, the R/X of circuit is bigger, and may there be some difference in equivalence and original loads that the load of sharing down calculates by trend, if necessary can be according to the P such as duty value such as grade under the initial load _EquThe correction factor K' of calculating K, its expression formula is:

$K^{\′}=\frac{P_{\mathrm{equ}}}{({\mathrm{\ΣP}}_{\mathrm{load}}-{\mathrm{\ΣP}}_{\mathrm{gen}}+{\mathrm{\ΣP}}_{\mathrm{gload}})}{\left(\frac{P_{\mathrm{supplier}}}{P_{\mathrm{equ}}}\right)}^2.$

Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement the specific embodiment of the present invention, and do not break away from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (7)

1. the disposal route based on the electrical network computational data of topological analysis is characterized in that described method comprises the steps:

(1) generates power supply area;

(2) folding and expansion power supply area;

(3) obtain the duty value that waits of power supply area;

(4) will wait duty value to share each load point in the power supply area.

2. disposal route as claimed in claim 1 is characterized in that, the step of the described generation power supply area of step (1) comprises:

1) the power supply buses section of needs equivalence is carried out topological analysis;

2), with the node of this electric UNICOM of bus section, busbar section, and this power supply area numbering is set on described node in the search method of operation from the power supply buses section;

When 3) searching for transformer,, then forbid this node is added power supply area, and this node is not searched for greater than the power supply buses electric pressure as if transformer high-voltage side electric pressure, the major network tie point calculates and adds one.

3. disposal route as claimed in claim 1 is characterized in that, step (2) step folding and the expansion power supply area comprises:

1) power supply area that participates in calculating is launched operation: the non-invalid equipment of power supply area is arranged to effective status, waits duty value to be arranged to folded state, comprised the whole electric network datas of power supply area in the computational data;

2) power supply area of ignoring is carried out folding operation: the effective equipment of power supply area is arranged to folded state, waits duty value to be arranged to effective status, use by equivalent load simulation power supply area in the computational data.

4. disposal route as claimed in claim 1 is characterized in that, step (3) is calculated by trend or the mode of statistics obtain power supply area etc. duty value.

5. disposal route as claimed in claim 4 is characterized in that, calculates the step that waits duty value of obtaining power supply area by trend and comprises:

1) the electrical network computational data of extraction power supply area is a balance node for goddess of lightning's line segment, forms the trend computational data;

2) balance node voltage is set to the magnitude of voltage of this bus section, busbar section expectation;

3) start trend and calculate, obtain the equilibrator duty values such as conduct of exerting oneself;

4) judge whether trend restrains, as if not restraining, the rationality of circuit and transformer parameter in the then rationality of pointing out inspection to load and arrange, or the inspection power supply area.

6. disposal route as claimed in claim 4, it is characterized in that, the mode equivalence of loading by statistics is calculated as: the difference of power supply area load and generating statistical value as the active power that waits duty value, is calculated equivalent reactive power of loading according to the power factor of expection again.

7. disposal route as claimed in claim 1 is characterized in that, the step that step (4) will wait duty value to share each load point in the power supply area comprises:

1) according to equivalent point delivery P _SupplierCalculated load is adjusted COEFFICIENT K, and its expression formula is:

In the formula, P _GloadBe station service active power; P _GenBe generator active power; P _LoadBe load;

2) active power and the reactive power of all loads in the power supply area are all amplified K doubly.

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