CN103606009A - Distribution network measuring quality evaluation method based on minimum distribution area - Google Patents

Abstract

The invention relates to the field of distribution network measuring quality evaluation and in particular relates to a distribution network measuring quality evaluation method based on a minimum distribution area. The method comprises the following steps: determining a minimum distribution area of a cable and overhead line mixed architecture network, and providing a distribution network parent-child hierarchical model; providing a busbar voltage measuring reliability discrimination rule based on the parent-child hierarchical model, and giving the detailed voltage quality evaluation indexes; analyzing a change rule of switching telemetering data in details according to the characteristics of the distribution network architecture, and giving the detailed switching telemetering quality evaluation indexes; giving the detailed switching remote signaling quality evaluation indexes according to the switching telemetering quality evaluation indexes and the distribution network operating rule. According to the method, the problem of remote signaling and telemetering quality reliability evaluation in the cable and overhead line mixed architecture network can be well solved, a basis can be provided for identification and correction of state estimation data of the distribution network, and a data support is provided for evaluating an operating state of the distribution network.

Description

Power distribution network measuring quality appraisal procedure based on minimum distribution region

Technical field

The present invention relates to power distribution network measuring quality evaluation areas, be specifically related to a kind of power distribution network measuring quality appraisal procedure based on minimum distribution region.

Background technology

In recent years, along with the energetically input of country to power distribution network infrastructure, a collection of distribution network automated pilot project is smoothly by checking and accepting.Electric distribution network data collection scope and scale constantly expand, and the quasi real time access of system such as load management system (CIS), Geographic Information System (AM FM GIS) in addition, makes the practical possibility that becomes of the senior application of power distribution network.

Measuring accurately and is reliably the prerequisite of carrying out the senior computation of power distribution network, and often there is deviation in its accuracy of the measurement collecting in reality, due to the conduction of algorithm, causing being measured by mistake is that senior application result and the actual conditions of foundation are saved as very large deviation.Therefore, determine the confidence level of Real-time Collection remote signalling remote measurement amount, various measurements are carried out to quality reliability assessment, use measurement with a high credibility to calculate, have important practical significance.

Summary of the invention

For solving power distribution network measuring quality reliability assessment in service problem, the present invention, in conjunction with power distribution network feature, provides a kind of power distribution network measuring quality appraisal procedure based on minimum distribution region.

For achieving the above object, the scheme that the present invention adopts is as follows:

A power distribution network measuring quality appraisal procedure based on minimum distribution region, comprises the steps:

(1) divide the minimum distribution region of cable and overhead transmission line hybrid structure network, for the minimum distribution of overhead transmission line region, set up virtual switch; Every the many directly connections of overhead feeder section distribution transforming, the load difference that feeder line section two end switch flow through is its distribution transformer load of being with, for the correct load condition of describing overhead feeder section, distribution transforming under this feeder line section is equivalent to a load, by a virtual switch T, receive in feeder line section.The load that virtual switch flows through is the load difference that feeder line section end points switch flows through.

(2) set up minimum distribution region father and son's hierarchical model:

1) setting up minimum distribution region adjacency list Q, to describe a minimum distribution region as follows:

Q _x＝{x|F _x,C _x}

Wherein, x be minimum distribution region enter domain switch, F _xfor the load in minimum distribution region goes out domain switch set, C _xfor the connection in minimum distribution region goes out domain switch set, be specially:

$\left\{\begin{array}{c}{F}_x=\{{\mathrm{<figure-callout\; id="1"\; label="F"\; filenames="HDA0000433814560000011.png"\; state="\{\{state\}\}">F</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="F"\; filenames="HDA0000433814560000011.png"\; state="\{\{state\}\}">F</figure-callout>}}_2,\&CenterDot;\&CenterDot;\&CenterDot;{,F}_n\}\\ C_x=\{{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HDA0000433814560000011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HDA0000433814560000011.png"\; state="\{\{state\}\}">C</figure-callout>}}_2,\&CenterDot;\&CenterDot;\&CenterDot;,C_m\}\end{array}\right.$

Wherein, n is the contained domain switch number of loading out in minimum distribution region, and to be that minimum distribution region is contained connect domain switch number to m;

2) set up minimum distribution region father and son's layering adjacency list G and describe the father and son's hierarchical relational between adjacent minimum distribution region, Yu Qi downstream, minimum distribution region, specifically describe and be:

G(Q _x)＝{Q _C1,Q _C2,…,Q _Cm}

Q wherein _xfor take x as entering the minimum distribution region of domain switch, C1, C2 ..., the connection that Cm is this minimum distribution region goes out domain switch;

3) set up the topological connection relation that sub-island topological adjacency table W describes the sub-island of whole minimum distribution, be specially:

W _i＝{G(Q ₁),G(Q ₂),…,G(Q _N)}

Wherein, i is the sub-island of minimum distribution numbering, and N is the minimum distribution number of regions that the sub-island of minimum distribution comprises, and all minimum distribution region father and son's layering adjacency list has formed the topological model on the sub-island of whole minimum distribution.

(3) rely on minimum distribution region father and son's hierarchical model to determine and evaluate the busbar voltage measuring quality evaluation index that busbar voltage measures confidence level:

First rule that should be satisfied according to busbar voltage is set up respectively evaluation principle:

1) each busbar voltage should be in its range of nominal tension, and it should be less than ceiling voltage, is greater than minimum voltage, now, set up the first busbar voltage measuring quality and evaluate principle, that is: when busbar voltage is in the range of nominal tension, quality evaluation index is certain value K ₁, when not in the range of nominal tension, quality evaluation index is 0;

2) busbar voltage flows to gradually and reduces along trend, be that minimum distribution region voltage is less than the minimum distribution region voltage of his father and is greater than its sub minimum distribution region voltage, minimum distribution region voltage is the voltage of its contained bus, if in minimum distribution region without bus, busbar voltage refers to contained feeder voltage in minimum distribution region, now, set up the second busbar voltage measuring quality and evaluate principle, that is: when minimum distribution region voltage meets subregion voltage limit value and father region voltage limit value condition, quality evaluation index is certain value K ₂, when not meeting constraint condition, quality evaluation index is 0;

Then, according to two kinds of busbar voltage measuring qualities, evaluate principles, with two kinds of quality evaluation indexs and as busbar voltage measuring quality evaluation overall performance.

(4) determine the switch remote measurement quality evaluation index of evaluating switch telemetry confidence level:

First rule that should be satisfied according to each switch remote measurement amount of minimum distribution region is set up respectively evaluation principle:

1) if close a floodgate out in minimum distribution region, domain switch number is greater than 1, this minimum distribution region respectively goes out domain switch remote measurement amount and need be less than it and enter domain switch remote measurement amount, now set up the first switch remote measurement quality assessment principle, that is: when minimum distribution region close a floodgate out domain switch number be greater than 1 and its go out domain switch remote measurement amount and be less than it and enter domain switch remote measurement amount, or the domain switch number that closes a floodgate out equals at 1 o'clock, this goes out domain switch quality evaluation index is certain value K ₃, when minimum distribution region close a floodgate out domain switch number be greater than 1 and its when going out domain switch remote measurement amount and being greater than it and entering domain switch remote measurement amount its evaluation index be 0;

2) in minimum distribution region, enter domain switch remote measurement amount and should substantially equal all summations that go out domain switch remote measurement amount, be that both differences are less than a certain error, now set up the second switch remote measurement quality assessment principle, that is: when minimum distribution region discrepancy domain switch remote measurement amount difference is less than a certain error, the remote measurement quality evaluation index of these all switches in region is certain value K ₄if, do not meet this constraint condition, evaluation index is 0;

Then, according to two kinds of switch remote measurement quality assessment principles, with two kinds of quality evaluation indexs and as switch remote measurement quality assessment overall performance.

(5), according to switch remote measurement quality evaluation index and distribution moving law, determine the remote signalling quality evaluation index of evaluating switch remote signalling data confidence level:

If minimum distribution section switch flows through trend, its switch remote signalling state should be combined floodgate, according to this rule, switch remote signalling quality assessment principle is: when minimum distribution section switch remote measurement quality evaluation index non-zero, and remote measurement amount non-zero, and this switch remote signalling state is when closing a floodgate, its remote signalling quality evaluation index is 1; If switch remote measurement quality evaluation index non-zero, and this switch remote signalling state is separating brake and distant while being measured as zero, its remote signalling quality evaluation index is 1; If switch remote signalling quality evaluation index non-zero, and switch remote signalling state is while being separating brake and remote measurement amount non-zero, its remote signalling quality evaluation index is-1; If switch remote measurement quality evaluation index is zero, this switch remote signalling state is indefinite, and its remote signalling quality evaluation index is 0.

Switch remote signalling erroneous judgement will make minimum distribution region father and son's hierarchical model mistake, thereby causes the sub-island of whole minimum distribution topological model mistake, so the identification of switch remote signalling is most important.

Step (1) determines that the division principle in the minimum distribution region of cable and overhead transmission line hybrid structure network is: if block switch is all 2 distant points or 3 distant points, each block switch is all the boundary node in minimum distribution region; If block switch is a distant point or without remote signalling telemetry function, block switch is all the interior point in minimum distribution region entirely; If block switch partly has remote signalling telemetry function, part does not have remote signalling telemetry function, and the block switch that possesses two distant functions can be used as minimum distribution zone boundary node, and the block switch that does not possess two distant functions must be as the interior point in minimum distribution region.Wherein, distant referring to has remote signaling function, and two distant referring to have remote signalling telemetry function, and three distant referring to have remote-detecting remote-controlling function.

Below some terms are described: for open loop operation power distribution network, each minimum distribution region has and only have a trend to flow into switch, is called into domain switch; At least there is one or several trend and flow out switch, be called domain switch; Go out domain switch by switchtype can be divided into load out domain switch be connected domain switch, the domain switch of loading out refers to the switch of direct connection substation transformer, connects domain switch and refers to the common switch that connects adjacent minimum distribution region.Switch remote measurement amount refers to the trend that switch flows through, and comprises active power, reactive power and electric current.

Below the special circumstances of each quality evaluation index are described:

The initial minimum distribution region voltage that in step (3), regulation contains transformer station's outlet switch is substation bus bar voltage, and its quality of voltage evaluation index is 1.

The remote measurement quality evaluation index of stipulating transformer station's outlet switch in step (4) is 1, and this measurement is credible.

Step (4) if in switch is distant is measured as 0, and switch separating brake, its remote measurement quality evaluation index is 1, it is 0 that virtual switch measures initial value, its remote measurement quality evaluation index is 0.

The present invention has determined the minimum distribution region of cable and overhead transmission line hybrid structure network, and distribution father and son hierarchical model proposed, based on this father and son's hierarchical model, propose busbar voltage and measured confidence level decision principle, and provided detailed quality of voltage evaluation index.Meanwhile, according to Distribution Network Frame feature, labor switch telemetry Changing Pattern, proposed switch telemetry confidence level decision principle, and provided detailed switch remote measurement quality evaluation index.According to switch remote measurement quality evaluation index and distribution moving law, provided switch remote signalling data confidence level decision principle, and provided detailed switch remote signalling quality evaluation index.

The present invention can solve cable and remote signalling remote measurement quality reliability assessment problem in overhead transmission line mixing distribution network preferably, can provide foundation for the identification of state of electric distribution network data estimator and correction, also can be the assessment of power distribution network running status data supporting is provided.

Accompanying drawing explanation

Fig. 1 is embodiment of the present invention distribution network figure used.

Embodiment

A power distribution network measuring quality appraisal procedure based on minimum distribution region, comprises the steps:

(1) determine the minimum distribution region of cable and overhead transmission line hybrid structure network, for the minimum distribution of overhead transmission line region, set up virtual switch:

The division principle in minimum distribution region is: if block switch is all 2 distant points or 3 distant points, each block switch is all the boundary node in minimum distribution region.If block switch is a distant point or without remote signalling telemetry function, block switch is all the interior point in minimum distribution region entirely.If block switch partly has remote signalling telemetry function, part does not have remote signalling telemetry function, and the block switch that possesses two distant functions can be used as minimum distribution zone boundary node, and the block switch that does not possess two distant functions must be as the interior point in minimum distribution region.

Every the many directly connections of overhead feeder section distribution transforming, the load difference that feeder line section two end switch flow through is its distribution transformer load of being with, for the correct load condition of describing overhead feeder section, distribution transforming under this feeder line section is equivalent to a load, by a virtual switch T, receive in feeder line section.The load that virtual switch flows through is the load difference that feeder line section end points switch flows through.

(2) set up minimum distribution region father and son's hierarchical model:

For open loop operation power distribution network, each minimum distribution region has and only has a trend to flow into switch, is called into domain switch; At least there is one or several trend and flow out switch, be called domain switch; Go out domain switch by switchtype can be divided into load out domain switch be connected domain switch, the domain switch of loading out refers to the switch of direct connection substation transformer, connects domain switch and refers to the common switch that connects adjacent minimum distribution region.

1) setting up minimum distribution region adjacency list Q, to describe a minimum distribution region as follows:

Q _x＝{x|F _x,C _x}

Wherein, x be minimum distribution region enter domain switch, F _xfor the load in minimum distribution region goes out domain switch set, C _xfor the connection in minimum distribution region goes out domain switch set, be specially:

$\left\{\begin{array}{c}{F}_x=\{{\mathrm{<figure-callout\; id="1"\; label="F"\; filenames="HDA0000433814560000011.png"\; state="\{\{state\}\}">F</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="F"\; filenames="HDA0000433814560000011.png"\; state="\{\{state\}\}">F</figure-callout>}}_2,\&CenterDot;\&CenterDot;\&CenterDot;{,F}_n\}\\ C_x=\{{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HDA0000433814560000011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HDA0000433814560000011.png"\; state="\{\{state\}\}">C</figure-callout>}}_2,\&CenterDot;\&CenterDot;\&CenterDot;,C_m\}\end{array}\right.$

Wherein, n is the contained domain switch number of loading out in minimum distribution region, and to be that minimum distribution region is contained connect domain switch number to m.

2) set up minimum distribution region father and son's layering adjacency list G and describe the father and son's hierarchical relational between adjacent minimum distribution region, Yu Qi downstream, minimum distribution region, specifically describe and be:

G(Q _x)＝{Q _C1,Q _C2,…,Q _Cm}

Q wherein _xfor take x as entering the minimum distribution region of domain switch, C1, C2 ..., the connection that Cm is this minimum distribution region goes out domain switch.

3) set up the topological connection relation that sub-island topological adjacency table W describes the sub-island of whole minimum distribution, be specially:

W _i＝{G(Q ₁),G(Q ₂),…,G(Q _N)}

Wherein, i is the sub-island of minimum distribution numbering, and N is the minimum distribution number of regions that the sub-island of minimum distribution comprises, and all minimum distribution region father and son's layering adjacency list has formed the topological model on the sub-island of whole minimum distribution.

(3) rely on minimum distribution region father and son's hierarchical model to determine and evaluate the busbar voltage measuring quality evaluation index that busbar voltage measures confidence level:

For open loop operation power distribution network, each switching station, ring main unit busbar voltage should meet certain rule, and rule that first should be satisfied according to busbar voltage is set up respectively evaluation principle:

1) each busbar voltage should be in its range of nominal tension, and it should be less than ceiling voltage, is greater than minimum voltage, specifically describes to be:

V _down≤V≤V _up

Wherein, V is busbar voltage; V _downfor minimum voltage value; V _upfor maximum voltage value.

According to this rule, set up the first busbar voltage measuring quality and evaluate principle, that is: when busbar voltage is in the range of nominal tension, quality evaluation index is certain value K ₁, when not in the range of nominal tension, quality evaluation index is 0, the busbar voltage quality evaluation index of establishing this principle is S _v1, initial value is 0, this principle specifically describes and is:

${\mathrm{<figure-callout\; id="1"\; label="S\; V"\; filenames="HDA0000433814560000011.png"\; state="\{\{state\}\}">S</figure-callout>}}_V=\left\{\begin{array}{cc}{K}_1& V_{\mathrm{down}}\&le;V\&le;V_{\mathrm{up}}\\ 0& V>V_{\mathrm{up}}\left|\right|V<V_{\mathrm{down}}\end{array}\right..$

2) busbar voltage flows to gradually and reduces along trend, and minimum distribution region voltage is less than the minimum distribution region voltage of his father and is greater than its sub minimum distribution region voltage, and minimum distribution region voltage is the voltage of its contained bus, specifically describes to be

V _Qchild≤V _Q≤V _Qfather

Wherein, V _qfor minimum distribution region magnitude of voltage, V _qchildfor the minimum distribution of son region magnitude of voltage, V _qfatherfor the minimum distribution of father region magnitude of voltage.

If, without bus, busbar voltage refers to contained feeder voltage in minimum distribution region in minimum distribution region.When more than one of the subregion in minimum distribution region, V _qchildvalue is the maximal value of all subregion magnitudes of voltage, when its subregion does not exist, and V _qchildbe 0.

According to this rule, set up the second busbar voltage measuring quality and evaluate principle, that is: when minimum distribution region voltage meets subregion voltage limit value and father region voltage limit value condition, quality evaluation index is certain value K ₂, when not meeting constraint condition, quality evaluation index is 0, the busbar voltage quality evaluation index of establishing this principle is S _v2, initial value is 0, this principle specifically describes and is:

${\mathrm{<figure-callout\; id="2"\; label="S\; V"\; filenames="HDA0000433814560000011.png"\; state="\{\{state\}\}">S</figure-callout>}}_V=\left\{\begin{array}{cc}{K}_2& V_{\mathrm{Qchild}}\&le;V_Q\&le;V_{\mathrm{Qfather}}\\ 0& V_Q>V_{\mathrm{Qfather}}\left|\right|V_Q<V_{\mathrm{Qchild}}\end{array}\right..$

Then, according to two kinds of busbar voltage measuring qualities, evaluate principles, with two kinds of quality evaluation indexs and as busbar voltage measuring quality evaluation overall performance, be specially:

S _V＝S _V1+S _V2

Wherein, S _vfor busbar voltage measuring quality is evaluated overall performance value, K ₁, K ₂∈ (0,1), K ₁+ K ₂=1.

(4) determine the switch remote measurement quality evaluation index of evaluating switch telemetry confidence level:

Switch remote measurement amount refers to the trend that switch flows through, and comprises active power, reactive power and electric current that switch flows through, and for minimum distribution region, its switch remote measurement amount need meet certain rule.First rule that should be satisfied according to each switch remote measurement amount of minimum distribution region is set up respectively evaluation principle:

1) if close a floodgate out in minimum distribution region, domain switch number is greater than 1, and this minimum distribution region respectively goes out domain switch remote measurement amount and need be less than it and enter domain switch remote measurement amount, specifically describes to be:

PQI _i≤PQI _x

Wherein, PQI _xfor minimum distribution region enters the trend (active power, reactive power, electric current) that domain switch flows through, i ∈ G (Q _x) for minimum distribution region, go out domain switch, PQI _ithe trend (active power, reactive power, electric current) flowing through for going out domain switch i.

According to this rule, set up the first switch remote measurement quality assessment principle, that is: when minimum distribution region close a floodgate out domain switch number be greater than 1 and its go out domain switch remote measurement amount and be less than it and enter domain switch remote measurement amount, or the domain switch number that closes a floodgate out equals at 1 o'clock, this goes out domain switch quality evaluation index is certain value K ₃, when minimum distribution region close a floodgate out domain switch number be greater than 1 and its when going out domain switch remote measurement amount and being greater than it and entering domain switch remote measurement amount its evaluation index be 0, the switch remote measurement quality evaluation index of establishing this principle is S _b1, initial value is 0, this principle specifically describes and is:

Wherein, k is the minimum distribution region domain switch number that closes a floodgate out; The remote measurement quality evaluation index of stipulating transformer station's outlet switch is 1, and this measurement is credible.

2) in minimum distribution region, enter domain switch remote measurement amount and should substantially equal all summations that go out domain switch remote measurement amount, both differences are less than a certain error, specifically describe to be:

$|{\mathrm{POI}}_x-\underset{i=1}{\overset{n+m}{\mathrm{\&Sigma;}}}{\mathrm{PQI}}_i|\&le;\mathrm{\&epsiv;}$

Wherein ε is minimum distribution region error in measurement, can be by experience value.

According to this rule, set up the second switch remote measurement quality assessment principle, that is: when minimum distribution region discrepancy domain switch remote measurement amount difference is less than a certain error, the remote measurement quality evaluation index of these all switches in region is certain value K ₄if, do not meet this constraint condition, evaluation index is 0, the switch remote measurement quality evaluation index of establishing this principle is S _b2, initial value is 0, this principle specifically describes and is:

${\mathrm{<figure-callout\; id="2"\; label="S\; B"\; filenames="HDA0000433814560000011.png"\; state="\{\{state\}\}">S</figure-callout>}}_B=\left\{\begin{array}{cc}{\mathrm{<figure-callout\; id="4"\; label="K"\; filenames="HDA0000433814560000011.png"\; state="\{\{state\}\}">K</figure-callout>}}_4& |{\mathrm{PQI}}_x-\underset{i=1}{\overset{n+m}{\mathrm{\&Sigma;}}}{\mathrm{PQI}}_i|\&le;\mathrm{\&epsiv;}\\ 0& |{\mathrm{PQI}}_x-\underset{i=1}{\overset{n+m}{\mathrm{\&Sigma;}}}{\mathrm{PQI}}_i|>\mathrm{\&epsiv;}\end{array}\right..$

Then, according to two kinds of switch remote measurement quality assessment principles, with two kinds of quality evaluation indexs and as switch remote measurement quality assessment overall performance, be specially:

S _B＝S _B1+S _B2

Wherein, S _bfor switch remote measurement quality assessment overall performance, K ₃, K ₄∈ (0,1), K ₃+ K ₄=1;

If switch remote measurement value is 0, and switch separating brake, its remote measurement quality evaluation index is 1.It is 0 that virtual switch measures initial value, and remote measurement quality index is 0.

(5), according to switch remote measurement quality evaluation index and distribution moving law, determine the remote signalling quality evaluation index of evaluating switch remote signalling data confidence level:

If minimum distribution section switch flows through trend, its switch remote signalling state should be combined floodgate, according to this rule, switch remote signalling quality assessment principle is: when minimum distribution section switch remote measurement quality evaluation index non-zero, and remote measurement amount non-zero, and this switch remote signalling state is when closing a floodgate, its remote signalling quality evaluation index is 1; If switch remote measurement quality evaluation index non-zero, and this switch remote signalling state is separating brake and distant while being measured as zero, its remote signalling quality evaluation index is 1; If switch remote signalling quality evaluation index non-zero, and switch remote signalling state is while being separating brake and remote measurement amount non-zero, its remote signalling quality evaluation index is-1; If switch remote measurement quality evaluation index is zero, this switch remote signalling state is indefinite, and its remote signalling quality evaluation index is 0, and establishing switch remote signalling quality evaluation index is S _bS, initial value is, specifically describes to be:

Wherein, S _bfor switch remote measurement quality assessment overall performance, B _sfor switch remote signalling state, B _s=1 for closing a floodgate, B _s=0 is separating brake, and η is switch telemetry errors, can be by experience value.

Below in conjunction with an object lesson, specific operation process of the present invention is described:

If in power distribution network, on-load switch A2 has two distant functions shown in Fig. 1, A1, A3 are without two distant functions, V1, V2 are virtual switch, each switching current and busbar voltage are as shown in the figure, switch top numerical value is busbar voltage, and unit is kV, and switch below numerical value is switching current, unit is A, and band " * " is labeled as suspicious gauge point.Get K ₁, K ₃be 0.6, K ₂, K ₄be 0.4.Rated voltage 10.5kV.

By described in step (1), the feeder line that the S2 of take is power switch is cable distribution network, and the division in its minimum distribution region is as shown in table 1:

The minimum distribution of cable system region in table 1 Fig. 1

The feeder line that the S1 of take is power switch is overhead feeder and cable feeder line mixing distribution network, establishes A1, A3 and does not possess two distant functions, and A2 possesses two distant functions, and the division in its minimum distribution region is as shown in table 2:

The minimum distribution of hybrid network region in table 2 Fig. 1

Wherein, V1, V2 are virtual switch node, and overhead transmission line block switch A2 is owing to having two distant functions, therefore it can be used as the boundary node in minimum distribution region, and A1, A3 do not possess two distant functions, can only be as the interior point in minimum distribution region.Due to the direct-connected distribution transforming of overhead feeder section, so need to increase by two virtual switches.

According to the described method of step (3), each region busbar voltage quality evaluation index of the feeder line that the S1 of take is power switch is as shown in table 3:

Each region busbar voltage measuring quality evaluation index in table 3 Fig. 1

According to the described method of step (4), each switch remote measurement quality evaluation index is as shown in table 4:

Each switch remote measurement quality evaluation index of table 4 Fig. 1

According to the described method of step (5), the remote signalling quality evaluation index of switch F3 is-1, and the remote signalling quality evaluation index of other switches is 1.

Claims (6)

1. the power distribution network measuring quality appraisal procedure based on minimum distribution region, is characterized in that comprising the steps:

(1) divide the minimum distribution region of cable and overhead transmission line hybrid structure network, for the minimum distribution of overhead transmission line region, set up virtual switch;

(2) set up minimum distribution region father and son's hierarchical model:

1) setting up minimum distribution region adjacency list Q, to describe a minimum distribution region as follows:

Q _x＝{x|F _x,C _x}

Wherein, x be minimum distribution region enter domain switch, F _xfor the load in minimum distribution region goes out domain switch set, C _xfor the connection in minimum distribution region goes out domain switch set, be specially:

$\left\{\begin{array}{c}{F}_x=\{F_1,F_2,\&CenterDot;\&CenterDot;\&CenterDot;{,F}_n\}\\ C_x=\{C_1,C_2,\&CenterDot;\&CenterDot;\&CenterDot;,C_m\}\end{array}\right.$

Wherein, n is the contained domain switch number of loading out in minimum distribution region, and to be that minimum distribution region is contained connect domain switch number to m;

2) set up minimum distribution region father and son's layering adjacency list G and describe the father and son's hierarchical relational between adjacent minimum distribution region, Yu Qi downstream, minimum distribution region, specifically describe and be:

G(Q _x)＝{Q _C1,Q _C2,…,Q _Cm}

Q wherein _xfor take x as entering the minimum distribution region of domain switch, C1, C2 ..., the connection that Cm is this minimum distribution region goes out domain switch;

3) set up the topological connection relation that sub-island topological adjacency table W describes the sub-island of whole minimum distribution, be specially:

W _i＝{G(Q ₁),G(Q ₂),…,G(Q _N)}

Wherein, i is the sub-island of minimum distribution numbering, and N is the minimum distribution number of regions that the sub-island of minimum distribution comprises, and all minimum distribution region father and son's layering adjacency list has formed the topological model on the sub-island of whole minimum distribution;

(3) rely on minimum distribution region father and son's hierarchical model to determine and evaluate the busbar voltage measuring quality evaluation index that busbar voltage measures confidence level:

First rule that should be satisfied according to busbar voltage is set up respectively evaluation principle:

1) each busbar voltage should be in its range of nominal tension, and it should be less than ceiling voltage, is greater than minimum voltage, now, set up the first busbar voltage measuring quality and evaluate principle, that is: when busbar voltage is in the range of nominal tension, quality evaluation index is certain value K ₁, when not in the range of nominal tension, quality evaluation index is 0;

2) busbar voltage flows to gradually and reduces along trend, be that minimum distribution region voltage is less than the minimum distribution region voltage of his father and is greater than its sub minimum distribution region voltage, minimum distribution region voltage is the voltage of its contained bus, if in minimum distribution region without bus, busbar voltage refers to contained feeder voltage in minimum distribution region, now, set up the second busbar voltage measuring quality and evaluate principle, that is: when minimum distribution region voltage meets subregion voltage limit value and father region voltage limit value condition, quality evaluation index is certain value K ₂, when not meeting constraint condition, quality evaluation index is 0;

Then, according to two kinds of busbar voltage measuring qualities, evaluate principles, with two kinds of quality evaluation indexs and as busbar voltage measuring quality evaluation overall performance;

(4) determine the switch remote measurement quality evaluation index of evaluating switch telemetry confidence level:

First rule that should be satisfied according to each switch remote measurement amount of minimum distribution region is set up respectively evaluation principle:

1) if close a floodgate out in minimum distribution region, domain switch number is greater than 1, this minimum distribution region respectively goes out domain switch remote measurement amount and need be less than it and enter domain switch remote measurement amount, now set up the first switch remote measurement quality assessment principle, that is: when minimum distribution region close a floodgate out domain switch number be greater than 1 and its go out domain switch remote measurement amount and be less than it and enter domain switch remote measurement amount, or the domain switch number that closes a floodgate out equals at 1 o'clock, this goes out domain switch quality evaluation index is certain value K ₃, when minimum distribution region close a floodgate out domain switch number be greater than 1 and its when going out domain switch remote measurement amount and being greater than it and entering domain switch remote measurement amount its evaluation index be 0;

2) in minimum distribution region, enter domain switch remote measurement amount and should substantially equal all summations that go out domain switch remote measurement amount, be that both differences are less than a certain error, now set up the second switch remote measurement quality assessment principle, that is: when minimum distribution region discrepancy domain switch remote measurement amount difference is less than a certain error, the remote measurement quality evaluation index of these all switches in region is certain value K ₄if, do not meet this constraint condition, evaluation index is 0;

Then, according to two kinds of switch remote measurement quality assessment principles, with two kinds of quality evaluation indexs and as switch remote measurement quality assessment overall performance;

(5), according to switch remote measurement quality evaluation index and distribution moving law, determine the remote signalling quality evaluation index of evaluating switch remote signalling data confidence level:

If minimum distribution section switch flows through trend, its switch remote signalling state should be combined floodgate, according to this rule, switch remote signalling quality assessment principle is: when minimum distribution section switch remote measurement quality evaluation index non-zero, and remote measurement amount non-zero, and this switch remote signalling state is when closing a floodgate, its remote signalling quality evaluation index is 1; If switch remote measurement quality evaluation index non-zero, and this switch remote signalling state is separating brake and distant while being measured as zero, its remote signalling quality evaluation index is 1; If switch remote signalling quality evaluation index non-zero, and switch remote signalling state is while being separating brake and remote measurement amount non-zero, its remote signalling quality evaluation index is-1; If switch remote measurement quality evaluation index is zero, this switch remote signalling state is indefinite, and its remote signalling quality evaluation index is 0.

2. the power distribution network measuring quality appraisal procedure based on minimum distribution region according to claim 1, it is characterized in that: step (1) determines that the division principle in the minimum distribution region of cable and overhead transmission line hybrid structure network is: if block switch is all 2 distant points or 3 distant points, each block switch is all the boundary node in minimum distribution region; If block switch is a distant point or without remote signalling telemetry function, block switch is all the interior point in minimum distribution region entirely; If block switch partly has remote signalling telemetry function, part does not have remote signalling telemetry function, and the block switch that possesses two distant functions can be used as minimum distribution zone boundary node, and the block switch that does not possess two distant functions must be as the interior point in minimum distribution region.

3. the power distribution network measuring quality appraisal procedure based on minimum distribution region according to claim 1, is characterized in that: for open loop operation power distribution network, each minimum distribution region has and only have a trend to flow into switch, is called into domain switch; At least there is one or several trend and flow out switch, be called domain switch; Go out domain switch by switchtype can be divided into load out domain switch be connected domain switch, the domain switch of loading out refers to the switch of direct connection substation transformer, connects domain switch and refers to the common switch that connects adjacent minimum distribution region.

4. the power distribution network measuring quality appraisal procedure based on minimum distribution region according to claim 1, it is characterized in that: the initial minimum distribution region voltage that in step (3), regulation contains transformer station's outlet switch is substation bus bar voltage, and its quality of voltage evaluation index is 1.

5. the power distribution network measuring quality appraisal procedure based on minimum distribution region according to claim 1, is characterized in that: the remote measurement quality evaluation index of stipulating transformer station's outlet switch in step (4) is 1, and this measurement is credible.

6. the power distribution network measuring quality appraisal procedure based on minimum distribution region according to claim 5, it is characterized in that: step (4) if in switch is distant is measured as 0, and switch separating brake, its remote measurement quality evaluation index is 1, it is 0 that virtual switch measures initial value, and its remote measurement quality evaluation index is 0.

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