CN109308389B - Modeling method of subway direct-current traction power supply system based on CIM extended model - Google Patents
Modeling method of subway direct-current traction power supply system based on CIM extended model Download PDFInfo
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Abstract
The invention provides a modeling method of a subway direct-current traction power supply system based on a CIM (common information model) extension model. The method comprises the following steps: establishing an equipment model of the subway direct-current traction power supply system based on the CIM extension model; establishing a static relationship between the equipment models; and collecting the end points of the equipment model to form a topological model of the subway direct-current traction power supply system. According to the method, the equipment model of the subway direct-current traction power supply system is established in the form of an IEC61970 standard CIM extension model, and the incidence relation among the models is formed, so that the topological model of the direct-current traction power supply system is formed, and various advanced applications based on network analysis can be conveniently expanded to the field of subway electric power scheduling; the method provides guidance for modeling of the subway direct-current traction power supply system, and provides technical feasibility for interoperation and mutual integration among different manufacturers in different application scenes.
Description
Technical Field
The invention relates to the field of subway power dispatching, in particular to a subway direct-current traction power supply system modeling method based on a CIM (common information model) extension model.
Background
The IEC61970 series of standards is a standard issued by IEC (International Electrotechnical Commission) that defines the Application Program Interface (API) of the power grid Energy Management System (EMS), which defines the Common Information Model (CIM) that describes the main objects of the power system. The CIM unifies a power grid model, and realizes integration between EMS applications independently developed by different developers or between the whole EMS system independently developed or between the EMS system and other power grid operation systems by a standard method that the CIM displays power system resources and the relationship between the power system resources in an object class and attribute mode.
The subway power dispatching system is also a branch of an Energy Management System (EMS), but a CIM model of the IEC61970 standard does not describe a specific direct-current traction power supply system model in a subway power supply system, so that different developers in the field of subway power dispatching can model the direct-current traction power supply system according to respective private models, and the universality of the models cannot be realized. Because the DC traction power supply system model does not establish a public information model, interaction and integration among different systems and different applications in the field of subway power dispatching are prevented.
Disclosure of Invention
The embodiment of the invention aims to provide a modeling method of a subway direct-current traction power supply system based on a CIM extension model, which aims to overcome the defects in the prior art, establish a general information model of the subway direct-current traction power supply system and facilitate interaction and integration between different applications and different systems.
The embodiment of the invention provides a modeling method of a subway direct-current traction power supply system based on a CIM extended model, which comprises the following steps:
establishing an equipment model of the subway direct-current traction power supply system based on the CIM extended model;
establishing a static relation between the equipment models;
and collecting the end points of the equipment model to form a topological model of the subway direct-current traction power supply system.
Further, the establishing of the equipment model of the subway direct current traction power supply system based on the CIM extension model comprises the following steps:
defining a CIM extension model traction package;
defining a new equipment model of the subway direct-current traction power supply system in the CIM extended model packet;
and the new equipment model and the CIM existing model together establish an equipment model of the subway direct current traction power supply system.
Further, the new device model includes:
the rectifier unit is a model for describing the type and parameters of the rectifier unit;
the inversion feedback unit is a model for describing the type and parameters of the regeneration energy inversion feedback unit;
the contact network is a model for describing the type and parameters of each contact network;
the steel rail is a model for describing the type and parameters of each section of steel rail.
Further, the rectifier unit is associated with three endpoints;
the inversion feedback unit is associated with three endpoints;
the contact network is associated with two endpoints;
the rails are associated with two end points.
Further, the existing model comprises a plant station, an alternating current bus, an alternating current switch, a direct current bus and a direct current switch.
Further, the plant station can be associated with a plurality of rectifier units and the inverter feedback units.
Further, the ac bus is associated with an end point;
the alternating current switch is associated with two end points;
the direct current bus is associated with one end point;
the DC switch is associated with two terminals.
Further, the establishing of the static relationship between the equipment models includes:
establishing a one-to-many incidence relation between a traction substation station of the subway direct-current traction power supply system and the rectifier unit;
establishing a one-to-many incidence relation between the traction substation station and the inversion feedback unit;
establishing a one-to-many incidence relation between the rectifier unit and an end point;
establishing a one-to-many incidence relation between the inversion feedback unit and the end point;
establishing a one-to-many incidence relation between the contact network and the end points;
establishing one-to-many incidence relation between the steel rail and the end point;
establishing a one-to-one incidence relation between the alternating current bus and an end point;
establishing a one-to-many incidence relation between the alternating current switch and an end point;
establishing a one-to-one incidence relation between the direct current bus and an end point;
and establishing one-to-many association relationship between the direct current switch and the end points.
Further, the aggregating the endpoints of the equipment model to form a topology model of the dc traction power supply system of the subway comprises:
aggregating endpoints of the interconnected device models to a connection point;
aggregating the connection points as topology nodes;
and aggregating all the communicated topological nodes into a topological island to form a topological model of the subway direct current traction power supply system.
Further, the aggregating the connection points is a topology node, wherein,
when the direct current switch is closed, the connection points on the two sides of the direct current switch are gathered into a topological node;
and if the direct current switch is separated, the connection points on two sides of the direct current switch belong to two topological nodes.
According to the technical scheme provided by the embodiment of the invention, the equipment model of the subway direct-current traction power supply system is established in the form of the IEC61970 standard CIM extension model, the incidence relation among the models is formed, and then the topological model of the direct-current traction power supply system is formed, so that various advanced applications based on network analysis can be conveniently expanded to the field of subway power scheduling; the method provides guidance for modeling of the subway direct-current traction power supply system, and provides technical feasibility for interoperation and mutual integration among different manufacturers in different application scenes.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a DC traction power supply system for a subway provided by an embodiment of the present invention;
fig. 2 is a schematic flow chart of a modeling method of a subway dc traction power supply system based on a CIM extended model according to an embodiment of the present invention;
fig. 3A is a schematic diagram of equipment of a subway dc traction power supply system based on a CIM extended model according to an embodiment of the present invention;
fig. 3B is a schematic diagram of equipment of a direct current traction power supply system for a subway based on a CIM extended model according to another embodiment of the present invention;
fig. 4 is a schematic diagram of a class relationship of a subway dc traction power supply system based on a CIM extended model according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, specific embodiments of the technical solutions of the present invention will be described in more detail and clearly below with reference to the accompanying drawings and the embodiments. However, the specific embodiments and examples described below are for illustrative purposes only and are not limiting of the invention. It is intended that the present invention cover only some embodiments of the invention and not all embodiments of the invention, and that other embodiments obtained by various modifications of the invention by those skilled in the art are intended to be within the scope of the invention.
Fig. 1 is a schematic diagram of a dc traction power supply system for a subway according to an embodiment of the present invention.
As shown in fig. 1, the system includes two traction substations, i.e. a traction substation a and a traction substation B, and taking the traction substation a as an example, the system includes an ac bus ACBUSA1, two ac switches ACBKA1 and ACBKA2, a rectifier unit reca 1, an inverter feedback unit FBINVA1, and two dc buses, i.e. a positive bus DCBUSA +, a negative bus DCBUSA-, four dc switches DCBKA1, DCBKA2, DCBKA3, and DCBKA 4.
Equipment in the traction substation B is the same as that in the traction substation A, the two traction substations are connected with two steel rails through two contact networks, namely an uplink contact network CAUP _ AB, a downlink contact network CADOWN _ AB, an uplink steel rail RAILUP _ AB and a downlink steel rail RAILDOWN _ AB; in addition, the traction substation a also has two contact networks and two steel rails connected with the left traction substation (not shown), which are respectively CAUP _ L, CADOWN _ L, RAILUP _ L, RAILDOWN _ L, and the traction substation B also has two contact networks and two steel rails connected with the right traction substation (not shown), which are respectively CAUP _ R, CADOWN _ R, RAILUP _ R, RAILDOWN _ R. The small black dots in the figure are the endpoints of the respective devices.
Fig. 2 is a schematic flow chart of a modeling method of a subway dc traction power supply system based on a CIM extended model according to an embodiment of the present invention, where the method includes the following steps.
In step S110, an equipment model of the subway dc traction power supply system is established based on the CIM extended model. Step S110 includes substeps S111, S112, S113.
And step S111, defining a CIM extension model traction package.
Defining a CIM extension model Traction packet, namely a Traction packet, wherein the type of the Traction packet is related to the subway direct current Traction power supply system
And step S112, defining a new equipment model of the subway direct current traction power supply system in the CIM extension model package.
The new equipment model comprises a rectifier unit, an inversion feedback unit, a contact net and a steel rail.
Rectifier unit, i.e. RectifierUnit. The model is used for describing the type and parameters of the rectifier unit. The model inherits from the acdconverter class in the IEC61970 standard DC package.
And inverting the feedback unit, namely the EnergyFeedbackUnit. The model is used for describing the type and parameters of the regenerative energy inversion feedback unit. The model inherits from the ACDCConverter class in the IEC61970 standard DC package.
Catenary system, i.e. catenary segment. The model is used for describing the type and parameters of each contact net. The model is inherited from a DCLineSegment class in an IEC61970 standard DC package.
The steel rail is RailSegment. The model is used for describing the type and parameters of each section of steel rail. The type is inherited from the DCLineSegment class in the IEC61970 standard DC package.
And S113, establishing an equipment model of the subway direct current traction power supply system by the new equipment model and the CIM existing model.
The existing model comprises a plant station, an alternating current bus, an alternating current switch, a direct current bus and a direct current switch.
As shown in fig. 1, rectifier units rect 1 and rect 1 participate in modeling as a rectifier unit type, inverter feedback units FBINVA1 and FBINVB1 participate in modeling as an energy feedback unit type, contact networks CAUP _ AB, cauda _ AB and CAUP _ L, CADOWN _ L, CAUP _ R, CADOWN _ R participate in modeling as a category segment type, and steel rails ralup _ AB, raldownn _ AB and rallup _ L, RAILDOWN _ L, RAILUP _ R, RAILDOWN _ R participate in modeling as a category segment type.
Fig. 3A is a schematic diagram of equipment of a subway dc traction power supply system based on a CIM extended model according to an embodiment of the present invention. FIG. 3A depicts the inheritance relationship between RectifireUnit, EnergyFeedbackUnit and IEC61970 standard CIM model. Fig. 3B is a schematic diagram of equipment of a metro direct current traction power supply system based on a CIM extended model according to another embodiment of the present invention. FIG. 3B depicts the inheritance relationship between CateranySegment, RailSegment and IEC61970 standard CIM model.
Traction Substation A, traction Substation B, AC buses ACBUSA1, ACBUSB1, AC switches ACBKA1, ACBKA2, ACBKB1, ACBKB2, DC buses DCBUSA +, DCBUSA-, DCBUSB +, DCBUSB-, DC switches DCBKA1, DCBKA2, DCBKA3, DCBKA4, DCBKB1, DCBKB2, DCBKB3 and DCBKB4 are modeled according to an existing CIM model of IEC61970 standard and respectively correspond to a station (Substation), a bus AC (Busbrasaction), an AC switch (Breaker), a DC bus (DCBusbar) and a DC switch (Breaker).
In step S120, a static relationship between the device models of the subway dc traction power supply system is established.
The rectifier unit (rectifierlit) and the inverter feedback unit (EnergyFeedbackUnit) are established under a station type (Substation), and the Substation can associate a plurality of rectifierlit units and energyfeedbackunits. FIG. 4 depicts the relationship between the CIM extension models RectifierUnit, EnergyFeedbackUnit and Substation. One end of the table is 1, and the other end of the table is 0, which represents a one-to-many association relationship. As shown in fig. 4, the Substation is associated with both the rectifierland the engyfeedbackunit in a one-to-many relationship, which means that one Substation can associate multiple rectifierland engyfeedbackunits.
Three terminals (Terminal) are associated with the rectifier block. As shown in fig. 1, taking reca 1 as an example, TA5, TA9 and TA15 are endpoints thereof.
The inversion feedback unit is associated with three terminals. As shown in fig. 1, for FBINVA1, TA7, TA14, and TA17 are endpoints.
The catenary is associated with two endpoints. As shown in fig. 1, taking the case of CAUP _ AB, TA21 and TB20 are endpoints, where TA21 is in traction substation a and TB20 is in traction substation B.
The rails are associated with two end points. As shown in fig. 1, TA23 and TB22 are endpoints of RAILUP _ AB, where TA23 is in traction substation a and TB22 is in traction substation B.
And establishing a one-to-many incidence relation between the traction substation station and the rectifier unit. And establishing a one-to-many incidence relation between the traction substation station and the inversion feedback unit. And establishing a one-to-many association relationship between the rectifier units and the endpoints. And establishing a one-to-many incidence relation between the inversion feedback unit and the end point. And establishing a one-to-many incidence relation between the contact network and the end points. And establishing one-to-many association relationship between the steel rail and the end point. FIG. 4 depicts the relationship of the RectisierUnit, EnergyFeedbackUnit, CaterarySegment, RailSegment, and Terminal described above. One end of the table is 1, and the other end of the table is 0, which represents a one-to-many association relationship. As shown in fig. 4, each of the rectifierlit, engyfeedbackunit, CatenarySegment, rainsegment, and Terminal has a one-to-many relationship, which indicates that the rectifierlit, enggnedbackunit, CatenarySegment, and rainsegment can be associated with a plurality of endpoints, i.e., a plurality of terminals.
The ac bus bussbarsection is associated with an end point (Terminal). As shown in FIG. 1, ACBUSA1 is taken as an example, and TA1 is its endpoint.
The ac switch Breaker is connected to two terminals (Terminal). As shown in fig. 1, ACBKA1 is taken as an example, and TA2 and TA4 are endpoints thereof.
The dc bus DCBusbar is associated with an end point (Terminal). As shown in FIG. 1, for example, DCBUSA +, TA11 is its endpoint.
The dc breaker is connected to two terminals (Terminal). As shown in fig. 1, DCBKA1 is taken as an example, and TA8 and TA24 are endpoints thereof.
And establishing one-to-one association relationship between the alternating current bus and the end points. And establishing one-to-many association relationship between the alternating current switch and the end points. And establishing one-to-one association relationship between the direct current bus and the end points. And establishing one-to-many association relationship between the direct current switch and the end points. FIG. 4 depicts the relation between the CIM standard models DCBusbar, DCBreaker and Terminal. The DCBusbar, the DCswitch and the Terminal are also in a one-to-many association relationship, and in a subway direct current traction power supply system, one Terminal is generally associated with the DCBusbar.
In step S130, the endpoints of the equipment model are aggregated to form a topology model of the dc traction power supply system of the subway. Step S130 includes substeps S131, S132, S133.
Step S131, aggregating the end points of the interconnected equipment models in the DC traction power supply system to a connection point.
And establishing one-to-many association relationship between the connection point and the endpoint. The connected end points (Terminal) are grouped together into a connection point (ConnectivityNode). As shown in fig. 2, TA1 to TA3 aggregate to CNODE _ a1, TA4 and TA5 aggregate to CNODE _ a2, TA6 and TA7 aggregate to CNODE _ A3, TA8 to TA14 aggregate to CNODE _ A4, TA20 aggregate to CNODE _ a5, TA21 aggregate to CNODE _ A6, TA24 aggregate to CNODE _ a7, TA25 aggregate to CNODE _ A8, TA15 to TA19, TA22, TA23, TA26 and TA27 aggregate to CNODE _ A9.
Fig. 4 depicts a relationship of Terminal aggregation to connectivtynode, which 0..1 indicates that Terminal can exist independently without aggregation to connectivtynode; multiple terminals can also be aggregated into 1 connectitvinode.
Step S132, the aggregation connection points are topological nodes.
It is determined which connection points (connectivities) can be grouped into topology nodes (topologic nodes) according to the switch on/off state. The connectivitynodes on both sides of the switch may be grouped into one topologic node if the switch is in a closed state. If the switch is in the off state, the connectivitynodes on both sides of the switch belong to two topologic nodes.
As shown in fig. 1, assuming that the ac switches ACBKA1 and ACBKA2 are both in the closed state, the CNODE _ a1 to CNODE _ A3 are gathered as the topology node TNODE _ a 1. Assuming that the dc switches DCBKA1, DCBKA2, DCBKA3, and DCBKA4 are all in a closed state, the CNODE _ a4 to CNODE _ A8 are gathered as a topology node TNODE _ a 1. CNODE _ a9 is aggregated into topology node TNODE _ A3;
similarly, assuming that the ac switch and the dc switch of the traction substation B are both in a closed state, the traction substation B also forms three topologic nodes, which are assumed to be TNODE _ B1-TNODE _ B3.
Fig. 4 illustrates a relationship in which the connectitive nodes are aggregated into the topologic node, and 0..1 indicates that the connectitive nodes may exist independently, may not be aggregated into the topologic node, or may be aggregated into one topologic node by a plurality of connectitive nodes.
And step S133, aggregating all the communicated topological nodes into a topological island to form a topological model of the subway direct-current traction power supply system.
As shown in fig. 1, when all the ac switches and the dc switches are in the closed state, TNODE _ a1 to TNODE _ A3 and TNODE _ B1 to TNODE _ B3 are grouped into one topological Island (topologic Island), which is named Island 1.
Fig. 4 illustrates the relationship of the topologic nodes grouped into the topologic island, wherein 1.. 0.. 1. indicates that the topologic nodes can exist independently, not grouped into the topologic island, or a plurality of topologic nodes grouped into one topologic island, and one topologic island is formed by at least one topologic node.
By analogy, a topological model of the whole subway line direct-current traction power supply system can be established.
It should be noted that the above-mentioned embodiments described with reference to the drawings are only intended to illustrate the present invention and not to limit the scope of the present invention, and it should be understood by those skilled in the art that modifications and equivalent substitutions can be made without departing from the spirit and scope of the present invention. Furthermore, unless the context indicates otherwise, words that appear in the singular include the plural and vice versa. Additionally, all or a portion of any embodiment may be utilized with all or a portion of any other embodiment, unless stated otherwise.
Claims (6)
1. A modeling method of a subway direct-current traction power supply system based on a CIM extension model comprises the following steps:
establishing an equipment model of the subway direct-current traction power supply system based on the CIM extended model;
establishing a static relationship between the equipment models;
collecting the end points of the equipment model to form a topological model of the subway direct-current traction power supply system; wherein
The equipment model for establishing the subway direct-current traction power supply system based on the CIM extension model comprises the following steps:
defining a CIM extension model traction package;
defining a new equipment model of the subway direct-current traction power supply system in the CIM extended model packet, wherein the new equipment model comprises a rectifier unit, an inverter feedback unit, a contact network and a steel rail;
the new equipment model and a CIM existing model are used for establishing an equipment model of the subway direct-current traction power supply system, wherein the CIM existing model comprises a station, an alternating-current bus, an alternating-current switch, a direct-current bus and a direct-current switch;
the establishing of the static relation between the equipment models comprises the following steps:
establishing a one-to-many incidence relation between a traction substation station of the subway direct-current traction power supply system and the rectifier unit;
establishing a one-to-many incidence relation between the traction substation station and the inversion feedback unit;
establishing a one-to-many incidence relation between the rectifier unit and an end point;
establishing a one-to-many incidence relation between the inversion feedback unit and the end points;
establishing a one-to-many incidence relation between the contact network and the end points;
establishing one-to-many incidence relation between the steel rail and the end point;
establishing a one-to-one incidence relation between the alternating current bus and an end point;
establishing a one-to-many incidence relation between the alternating current switch and an end point;
establishing a one-to-one incidence relation between the direct current bus and an end point;
establishing a one-to-many incidence relation between the direct current switch and an end point;
the gathering of the end points of the equipment model to form a topology model of the subway direct current traction power supply system comprises the following steps:
aggregating the endpoints of the interconnected device models to a connection point;
aggregating the connection points as topology nodes;
and aggregating all the communicated topological nodes as topological islands to form a topological model of the subway direct-current traction power supply system.
2. The method of claim 1,
the rectifier unit is a model for describing the type and parameters of the rectifier unit;
the inversion feedback unit is a model for describing the type and parameters of the regenerative energy inversion feedback unit;
the contact net is a model for describing the type and parameters of each contact net section;
the steel rail is a model used for describing the type and parameters of each section of steel rail.
3. The method of claim 1,
the rectifier set is associated with three endpoints;
the inversion feedback unit is associated with three endpoints;
the overhead line system is associated with two endpoints;
the rail is associated with two end points.
4. The method of claim 1, wherein the plant can associate a plurality of the rectifier units and the inverter feedback units.
5. The method of claim 1,
the alternating current bus is associated with one end point;
the alternating current switch is associated with two end points;
the direct current bus is associated with an end point;
the direct current switch is associated with two end points.
6. The method according to claim 1, wherein the aggregating the connection points is a topology node, wherein,
when the direct current switch is closed, the connection points on the two sides of the direct current switch are gathered into a topological node;
and if the direct current switch is separated, the connection points on the two sides of the direct current switch belong to two topological nodes.
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