Middle and low voltage network Fault Locating Method

Middle and low voltage network Fault Locating Method

  • CN 106,124,935 B
  • Filed: 07/18/2016
  • Issued: 05/07/2019
  • Est. Priority Date: 07/18/2016
  • Status: Active Grant
First Claim
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1. a kind of middle and low voltage network Fault Locating Method characterized by comprisingStep 1:

  • passing through power information acquisition system, distribution line on-line monitoring system, residual current action protector monitoring systemSystem, dispatch automated system, distribution automation system and production management system obtain middle and low voltage network power information,And middle and low voltage network power information is modified by trend distribution, improve middle and low voltage network topological relation;

    Power information acquisition system is for acquiring distribution transformer, electric energy meter operation information, voltage, electric current and information on load;

    MatchElectric line on-line monitoring system is for acquiring fault detector short circuit, ground connection warning information;

    Residual current action protector monitoringSystem is for acquiring total security locking warning information;

    Dispatch automated system is for acquiring switch failure separating brake warning information and protectionAction message;

    Distribution automation system is for acquiring switch changed position and fault trip information;

    Production management system is for obtainingMiddle and low voltage network relevant device parameter, feeder line electrical single-line diagram, topological relationship information and Distribution Network Equipment scheduled outageWith fault outage information;

    Step 2;

    middle and low voltage network topological relation is based on according to the power loss information in middle and low voltage network power information,It studies and judges algorithm progress failure by corresponding failure to study and judge, determining faulty equipment and analyzing power failure influences equipment and influence to useFamily, meanwhile, generating to have a power failure in conjunction with grid equipment and the geographical location information of power grid user influences geographic area,Power loss information in the middle and low voltage network power information is low-voltage circuit power loss, distribution transformer power loss, branchRoute power loss or basic routing line power loss;

    Middle and low voltage network Fault Locating Method is when carrying out failure and studying and judging, first according to the supply path of power loss equipment, byDown toward upper progress power supply point retrospect, faulty equipment is determined, then by faulty equipment carry out Network topology from top to bottom and determine to stopFilm rings equipment, alternatively, according to collected switch trip information, then Network topology is carried out from top to bottom, it determines and has a power failureInfluence equipment;

    Last basis is studied and judged as a result, combining battalion with the structuring address information and access point correspondence in perforation platformInformation, generating to have a power failure influences geographic area and has a power failure to influence customer information, improves fault location and scope of power outage judgement precision;

    If the power loss information in the step 2 is low-voltage circuit power loss, failure studies and judges algorithm are as follows;

    opens according to low pressure branch lineTripping or low pressure collector power loss warning information are closed, power supply point is carried out from lower to upper according to middle and low voltage network topological relation and chases afterIt traces back, obtains the common low pressure branch wiretap and interconnection switch status information under the same period, then carry out topology point from top to bottomAnalysis, determining to have a power failure influences equipment, once the low pressure branch line switch trip or low pressure collector power loss warning information number reported and submitted existIt within the scope of preset permission rate of false alarm, then studies and judges as the common low pressure branch line failure, and generates the influence of branch line failurePower supply interrupted district otherwise study and judge as this low pressure branch line or low pressure collector failure;

    If the power loss information in the step 2 is distribution transformer power loss, failure studies and judges algorithm are as follows;

    according to distribution transformerPower loss warning information carries out power supply point retrospect according to middle and low voltage network topological relation from lower to upper, obtains under the same periodThe public branch wiretap information of multiple distribution transformers, further according to branch'"'"'s wiretap and interconnection switch status information, from up toLower carry out topological analysis, determining to have a power failure influences equipment, once the power loss distribution transformer quantity reported and submitted is in preset permissionWithin the scope of rate of false alarm, then the branch line power loss is judged, and generate the power supply interrupted district of branch line power loss influence, otherwise, study and judge as thisDistribution transformer failure;

    Alternatively, according to low-voltage circuit power loss warning information, according to middle and low voltage network topological relation from it is lower towardUpper progress power supply point retrospect, obtains the affiliated distribution transformer of the low-voltage circuit, using the distribution transformer as starting point from top to bottom intoRow topological analysis determines that the influence equipment that has a power failure then is studied and judged such as low-pressure line-outgoing power loss all under the distribution transformer as this distributionTransformer power loss;

    Studying and judging result for two kinds can be used as the foundation mutually verified, and be able to achieve the merging for studying and judging result;

    If the power loss information in the step 2 is branched line power loss, failure studies and judges algorithm are as follows;

    switchs according to branched lineTrip information, according to middle and low voltage network topological relation, in conjunction with interconnection switch running state information, carries out topology from top to bottomAnalysis generates the power supply interrupted district that failure influences;

    Alternatively, being matched according to multiple distribution transformer power loss warning information according to mesolowElectric network topological relation carries out power supply point retrospect from lower to upper, obtains the public branch of multiple distribution transformers under the same periodLine switching, further according to branched line switch and interconnection switch status information, using public branch line switching as starting point, from up toLower carry out topological analysis, determining to have a power failure influences equipment, once the power loss distribution transformer quantity reported and submitted is in preset permissionIt within the scope of rate of false alarm, then studies and judges as the branched line power loss, and generates the power supply interrupted district of branched line power loss influence, otherwise study and judgeFor distribution transformer failure;

    Studying and judging result for two kinds can be used as the foundation mutually verified, and be able to achieve the merging for studying and judging result;

    If the power loss information in the step 2 is basic routing line power loss, failure studies and judges algorithm are as follows;

    switchs according to basic routing lineTrip information, according to middle and low voltage network topological relation, in conjunction with interconnection switch running state information, carries out topology from top to bottomAnalysis generates the power supply interrupted district that failure influences;

    Alternatively, according to a plurality of branched line power loss warning information, according to mesolow distributionNetwork topology carries out power supply point retrospect from lower to upper, obtains public trunk belonging to a plurality of branched line under the same periodLine switching status information is switched for starting point, from top to bottom in conjunction with interconnection switch running state information with public basic routing lineTopological analysis is carried out, determining to have a power failure influences equipment, once the basic routing line inferior division line switching tripping quantity reported and submitted is pre-Within the scope of the permission rate of false alarm first set, then studies and judges as basic routing line failure, otherwise study and judge as branch line failure;

    Two kinds are studied and judged knotFruit can be used as the foundation mutually verified, and be able to achieve the merging for studying and judging result;

    In the step 2, if power loss information simultaneously include basic routing line power loss, branched line power loss, distribution transformer power loss andTwo or more in low-voltage circuit power loss, then failure study and judge sequence according to power grid topological relation from top to bottom successively intoRow.

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