CN112821436A - Operation control method and system for flexible interconnection system of transformer area - Google Patents
Operation control method and system for flexible interconnection system of transformer area Download PDFInfo
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- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 2
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
- H02J13/00017—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/008—Circuit arrangements for ac mains or ac distribution networks involving trading of energy or energy transmission rights
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/14—Energy storage units
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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Abstract
The invention discloses an operation control method and system for a flexible interconnection system of a transformer area, and belongs to the technical field of operation control of power distribution systems. The method comprises the following steps: carrying out layered control on the flexible interconnection system of the transformer area, and when the flexible interconnection system of the transformer area is at the optimal control layer; controlling the operation action of the flexible interconnection system of the platform area in real time according to the logical operation result; and the control equipment layer carries out local response control according to the reference voltage and the power command received by the outer ring. The invention has the advantages of advancement in real-time power control, lower construction cost and advancement in advanced application on the premise of realizing the application of the same function.
Description
Technical Field
The invention relates to the technical field of operation control of power distribution systems, in particular to an operation control method and system for a flexible interconnection system of a transformer area.
Background
The grid-connected access of large-scale distributed photovoltaic, the wide popularization of power distribution and novel loads represented by electric energy replacing loads such as electric automobiles and electric heating directly influence the electric energy quality and operation control of the existing power distribution area, and the large-scale disordered access also causes the problem of insufficient capacity of the power distribution area and a power line, and needs to invest a large amount of funds to increase the capacity and expand the capacity.
On the other hand, the problem of large load difference of the transformer areas caused by inconsistent economic structures in the same area is that the access public variable capacity is gradually increased along with the promotion of the electrification engineering of countryside construction by governments, so that a large number of transformer areas have heavy load risks and cannot be solved by increasing capacity and distribution point investment, and the transformer areas with light loads and capacity not fully utilized also exist in the same area.
Therefore, the load balancing and energy optimizing capacity of the station intervals can be improved to a certain extent by mutually supplying the station intervals in the same area through interconnection, and the pressure of upgrading and transforming a power grid is relieved. At present, methods based on topology reconstruction, switch combination state switching and the like are mostly adopted for inter-platform area interconnection and mutual power supply, but in the interconnection and mutual power supply process in the traditional alternating current mode, due to the characteristics of closed-loop design and open-loop operation of an alternating current power grid, a bus connection switch between platform areas is always in a cold standby state when a system is in normal operation, and the mutual power controllability and the load balancing capability of the bus connection switch are not enough to support the requirements of rapid development of source and load two ends in the current platform area.
Disclosure of Invention
In order to solve the above problems, the present invention provides an operation control method for a flexible interconnection system in a distribution room, including:
carrying out layered control on the flexible interconnection system of the platform area;
when the flexible interconnection system of the transformer area is in the optimal control layer, determining a multi-time scale optimization instruction of a current control plan of the flexible interconnection system of the transformer area by using the local monitoring master station according to different time scale predicted values, and controlling the transformer area to run to a control target according to the multi-time scale optimization instruction;
when the flexible interconnection system of the transformer area is at the unified control layer, a central controller is used for collecting state quantity and analog quantity of an equipment layer, carrying out logic operation on the state quantity and the analog quantity to obtain a logic operation result, and carrying out real-time control on the operation action of the flexible interconnection system of the transformer area according to the logic operation result;
when the flexible interconnection system of the transformer area is positioned at the local control layer, the control equipment layer carries out local side response control according to the reference voltage and the power instruction received by the outer ring.
Optionally, the control target includes at least one of: the load balancing, peak clipping and valley filling, VPP and/or power supply reliability between the station areas meet preset requirements.
Optionally, the running action includes at least one of: the method comprises the steps of power flow controller start-stop action, power flow controller cascade coordination action, system cooperation action and/or system operation action.
Optionally, the local side response control includes: selecting a control operation mode to perform ground side response control according to the arrangement and combination result of the platform area triggering conditions;
wherein different operation modes map different cooperative control strategies and sequential control logic.
Optionally, the operation mode includes:
the method comprises the following steps of (1) an economic operation mode, wherein the triggering conditions of the economic operation mode are as follows: when the load rates of the transformer areas are lower than 60%, controlling the batteries of the transformer areas to charge and discharge according to the peak-valley electricity prices of the places where the transformer areas are located, enabling the AC/DC and the DC/DC of the transformer areas to operate in a constant power control mode, and evenly dividing the stored energy charge and discharge power;
a balanced load operation mode 1, wherein the trigger conditions of the balanced load operation mode 1 are as follows: when the load rate of any one of the transformer areas is greater than 60%, the rest transformer areas jointly store energy for load balancing, the transformer areas with the load rate greater than 60% are subjected to load balancing, the AC/DC of any one of the rest transformer areas is selected as a voltage source to perform a constant DC side voltage control mode, the AC/DC and the DC/DC of any one of the rest transformer areas are selected to operate in a constant power control mode, and the AC/DC of the transformer areas with the load rate greater than 60% operates in the constant power control mode;
a balanced load operation mode 2, wherein the trigger conditions of the balanced load operation mode 2 are as follows: when the load rate of any one of the transformer areas is less than 60%, the residual transformer area combined energy storage is uniformly loaded, the transformer area AC/DC with the load rate less than 60% is controlled to be used as a voltage source to operate in a constant direct current side bus voltage control mode, the DC/DC operates in a constant power control mode, and the residual transformer area AC/DC operates in a constant power control mode;
the power-off switching operation mode 1 comprises the following triggering conditions: when one of the transformer areas loses power, the remaining transformer areas jointly store energy to supply power to the power-losing transformer areas, the AC/DC of any one of the remaining transformer areas is selected as a voltage source to operate in a constant direct current side bus voltage control mode, the DC/DC and the other AC/DC operate in a constant power control mode, and the power-losing transformer areas AC/DC operate in a VF control mode;
before the power is supplied to the power-losing station area in the VF control mode, whether a feeder load is cut off or not is judged according to a moment load rate on the power-losing station area;
a power-off switching operation mode 2, wherein the triggering conditions of the power-off switching operation mode 2 are as follows:
when any one of the transformer areas is not in power loss, the rest transformer areas jointly store energy to supply power to the power loss transformer area, the AC/DC of the rest transformer areas as a voltage source operates in a constant direct current bus voltage control mode, the stored DC/DC operates in a constant power control mode, and the power loss transformer area AC/DC operates in a VF control mode;
a shutdown mode, wherein the triggering conditions of the shutdown mode are as follows: when the power of the transformer area is lost, the system is shut down.
Optionally, the hierarchical control includes: the system comprises an optimal control system, a unified control system and an in-place control system, wherein the optimal control system maps a local monitoring master station of a flexible interconnection system of a platform area, the unified control system maps a central controller of the flexible interconnection system of the platform area, and the in-place control system maps an equipment layer of the flexible interconnection system of the platform area.
The invention also provides an operation control system for the flexible interconnection system of the transformer area, which comprises the following components:
the mapping unit is used for carrying out hierarchical control on the flexible interconnection system of the transformer area;
the first hierarchical control unit is used for determining that when the flexible interconnection system of the transformer area is in the optimal control layer, controlling the local monitoring master station to determine a multi-time scale optimization instruction of a current control plan of the flexible interconnection system of the transformer area according to different time scale predicted values, and controlling the transformer area to operate to a control target according to the multi-time scale optimization instruction;
the second hierarchical control unit is used for controlling the central controller to acquire the state quantity and the analog quantity of the equipment layer, performing logical operation on the state quantity and the analog quantity to acquire a logical operation result and controlling the operation action of the flexible interconnection system of the transformer area in real time according to the logical operation result when the flexible interconnection system of the transformer area is in the unified control layer;
and the third hierarchical control unit is used for determining that when the flexible interconnection system of the transformer area is positioned at the local control layer, the control equipment layer is used for carrying out local response control according to the reference voltage and the power instruction received by the outer ring.
Optionally, the control target of the first hierarchical control unit includes at least one of: the load balancing, peak clipping and valley filling, VPP and/or power supply reliability between the station areas meet preset requirements.
Optionally, the operation action of the second hierarchical control unit includes at least one of the following: the method comprises the steps of power flow controller start-stop action, power flow controller cascade coordination action, system cooperation action and/or system operation action.
Optionally, the local side response control of the third hierarchical control unit includes: selecting a control operation mode to perform ground side response control according to the arrangement and combination result of the platform area triggering conditions;
wherein different operation modes map different cooperative control strategies and sequential control logic.
Optionally, the operation mode includes:
the method comprises the following steps of (1) an economic operation mode, wherein the triggering conditions of the economic operation mode are as follows: when the load rates of the transformer areas are lower than 60%, controlling the batteries of the transformer areas to charge and discharge according to the peak-valley electricity prices of the places where the transformer areas are located, enabling the AC/DC and the DC/DC of the transformer areas to operate in a constant power control mode, and evenly dividing the stored energy charge and discharge power;
a balanced load operation mode 1, wherein the trigger conditions of the balanced load operation mode 1 are as follows: when the load rate of any one of the transformer areas is greater than 60%, the rest transformer areas jointly store energy for load balancing, the transformer areas with the load rate greater than 60% are subjected to load balancing, the AC/DC of any one of the rest transformer areas is selected as a voltage source to perform a constant DC side voltage control mode, the AC/DC and the DC/DC of any one of the rest transformer areas are selected to operate in a constant power control mode, and the AC/DC of the transformer areas with the load rate greater than 60% operates in the constant power control mode;
a balanced load operation mode 2, wherein the trigger conditions of the balanced load operation mode 2 are as follows: when the load rate of any one of the transformer areas is less than 60%, the residual transformer area combined energy storage is uniformly loaded, the transformer area AC/DC with the load rate less than 60% is controlled to be used as a voltage source to operate in a constant direct current side bus voltage control mode, the DC/DC operates in a constant power control mode, and the residual transformer area AC/DC operates in a constant power control mode;
the power-off switching operation mode 1 comprises the following triggering conditions: when one of the transformer areas loses power, the remaining transformer areas jointly store energy to supply power to the power-losing transformer areas, the AC/DC of any one of the remaining transformer areas is selected as a voltage source to operate in a constant direct current side bus voltage control mode, the DC/DC and the other AC/DC operate in a constant power control mode, and the power-losing transformer areas AC/DC operate in a VF control mode;
before the power is supplied to the power-losing station area in the VF control mode, whether a feeder load is cut off or not is judged according to a moment load rate on the power-losing station area;
a power-off switching operation mode 2, wherein the triggering conditions of the power-off switching operation mode 2 are as follows:
when any one of the transformer areas is not in power loss, the rest transformer areas jointly store energy to supply power to the power loss transformer area, the AC/DC of the rest transformer areas as a voltage source operates in a constant direct current bus voltage control mode, the stored DC/DC operates in a constant power control mode, and the power loss transformer area AC/DC operates in a VF control mode;
a shutdown mode, wherein the triggering conditions of the shutdown mode are as follows: when the power of the transformer area is lost, the system is shut down.
Optionally, the hierarchical control of the mapping unit includes: the system comprises an optimal control system, a unified control system and an in-place control system, wherein the optimal control system maps a local monitoring master station of a flexible interconnection system of a platform area, the unified control system maps a central controller of the flexible interconnection system of the platform area, and the in-place control system maps an equipment layer of the flexible interconnection system of the platform area.
The invention has the advantages of advancement in real-time power control, lower construction cost and advancement in advanced application on the premise of realizing the application of the same function.
Drawings
Fig. 1 is a flowchart of an operation control method for a flexible interconnection system of a transformer district according to the present invention;
fig. 2 is a geographical diagram of an embodiment of an operation control method for a flexible interconnection system of a platform area according to the present invention;
FIG. 3 is a system diagram of an embodiment of an operation control method for a flexible interconnection system of a distribution room according to the present invention;
fig. 4 is a block diagram of an operation control system for a flexible interconnection system of a station area according to the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
The invention provides an operation control method for a flexible interconnection system of a transformer area, which comprises the following steps as shown in figure 1:
carrying out hierarchical control on the flexible interconnection system of the platform area, wherein the hierarchical control comprises the following steps: the system comprises an optimal control, a unified control and an in-place control, wherein the optimal control maps a local monitoring master station of a flexible interconnection system of a platform area, the unified control maps a central controller of the flexible interconnection system of the platform area, and the in-place control maps an equipment layer of the flexible interconnection system of the platform area;
when the flexible interconnection system of the transformer area is in the optimal control layer, determining a multi-time scale optimization instruction of a current control plan of the flexible interconnection system of the transformer area by using the local monitoring master station according to different time scale predicted values, and controlling the transformer area to run to a control target according to the multi-time scale optimization instruction;
when the flexible interconnection system of the transformer area is at the unified control layer, a central controller is used for collecting state quantity and analog quantity of an equipment layer, carrying out logic operation on the state quantity and the analog quantity to obtain a logic operation result, and carrying out real-time control on the operation action of the flexible interconnection system of the transformer area according to the logic operation result;
when the flexible interconnection system of the transformer area is positioned at the local control layer, the control equipment layer carries out local side response control according to the reference voltage and the power instruction received by the outer ring.
Wherein the control target includes: the load balancing, peak clipping and valley filling, VPP and/or power supply reliability between the station areas meet preset requirements.
Wherein the operation action comprises: the method comprises the steps of power flow controller start-stop action, power flow controller cascade coordination action, system cooperation action and/or system operation action.
Wherein, the response control of the local side comprises the following steps: selecting a control operation mode to perform ground side response control according to the arrangement and combination result of the platform area triggering conditions;
wherein different operation modes map different cooperative control strategies and sequential control logic.
Wherein, the operation mode includes:
the method comprises the following steps of (1) an economic operation mode, wherein the triggering conditions of the economic operation mode are as follows: when the load rates of the transformer areas are lower than 60%, controlling the batteries of the transformer areas to charge and discharge according to the peak-valley electricity prices of the places where the transformer areas are located, enabling the AC/DC and the DC/DC of the transformer areas to operate in a constant power control mode, and evenly dividing the stored energy charge and discharge power;
a balanced load operation mode 1, wherein the trigger conditions of the balanced load operation mode 1 are as follows: when the load rate of any one of the transformer areas is greater than 60%, the rest transformer areas jointly store energy for load balancing, the transformer areas with the load rate greater than 60% are subjected to load balancing, the AC/DC of any one of the rest transformer areas is selected as a voltage source to perform a constant DC side voltage control mode, the AC/DC and the DC/DC of any one of the rest transformer areas are selected to operate in a constant power control mode, and the AC/DC of the transformer areas with the load rate greater than 60% operates in the constant power control mode;
a balanced load operation mode 2, wherein the trigger conditions of the balanced load operation mode 2 are as follows: when the load rate of any one of the transformer areas is less than 60%, the residual transformer area combined energy storage is uniformly loaded, the transformer area AC/DC with the load rate less than 60% is controlled to be used as a voltage source to operate in a constant direct current side bus voltage control mode, the DC/DC operates in a constant power control mode, and the residual transformer area AC/DC operates in a constant power control mode;
the power-off switching operation mode 1 comprises the following triggering conditions: when one of the transformer areas loses power, the remaining transformer areas jointly store energy to supply power to the power-losing transformer areas, the AC/DC of any one of the remaining transformer areas is selected as a voltage source to operate in a constant direct current side bus voltage control mode, the DC/DC and the other AC/DC operate in a constant power control mode, and the power-losing transformer areas AC/DC operate in a VF control mode;
before power is supplied to a power-losing station area in a VF control mode, whether a feeder load is cut off or not is judged according to a moment load rate on the power-losing station area;
a power-off switching operation mode 2, wherein the triggering conditions of the power-off switching operation mode 2 are as follows:
when any one of the transformer areas is not in power loss, the rest transformer areas jointly store energy to supply power to the power loss transformer area, the AC/DC of the rest transformer areas as a voltage source operates in a constant direct current bus voltage control mode, the stored DC/DC operates in a constant power control mode, and the power loss transformer area AC/DC operates in a VF control mode;
a shutdown mode, wherein the triggering conditions of the shutdown mode are as follows: when the power of the transformer area is lost, the system is shut down.
The invention is further illustrated by the following examples:
the distribution transformer area system of two lion villages in Ningbo North Lun is explained below, and the geographical diagram is shown in FIG. 2, wherein 20 users (average load rate 20%) are accessed to the No. 1 area, 200 users (average load rate 54%) are accessed to the No. 2 area, and 80 users (average load rate 20%) are accessed to the No. 5 area.
In geographical position, about No. 2 platform district and No. 5 platform district distance 150 meters, about 800 meters in No. 1 platform district distance two preceding platform districts, No. 1, No. 2 and No. 5 platform become on the post, and platform becomes, switch, concentrator, platform become terminal, SVG all integrate to in the JP cabinet.
The platform transformers are 1 path of 10kV incoming lines and 3 paths of 400V feeder lines, wherein the platform transformer No. 1, the platform transformer No. 2 and the platform transformer No. 5 only use 2 paths of feeder lines, 1 path of feeder line is reserved for standby, and only 2 feeder line holes are formed in the JP cabinet body;
no. 3 platform becomes and No. 4 platform becomes that 3 way feeder has used, and 10kV inlet wire is furnished with the zero gram switch, and 400V low pressure main inlet wire is furnished with the switch, and 3 way feeder outlet sides are furnished with the nothing and open, and 5 platform become terminal information acquisition resolution all 15 minutes at present.
A set of flexible platform area interconnection system is built among platform areas No. 1, 2 and 5 in Ningbo North Lun, as shown in figure 3, 3 250kW bidirectional DC/AC converters are contained in a flexible interconnection container, an alternating current incoming line switch is embedded in each converter, 3 platform areas are collected into a direct current switch cabinet through respective DC/AC converters to form a wiring mode of a common direct current bus, the direct current switch cabinet is 3-in and 3-out, 1 line of 3 outgoing lines is connected into an energy storage system, the other 2 lines are connected into a fast charging pile in a standby mode, and the incoming line switch and the outgoing line switch in the direct current switch cabinet are integrated with a fast protection function.
The energy storage capacity of the lithium iron phosphate battery is 300kWh, the lithium iron phosphate battery is accessed into a direct current switch cabinet through 200kW bidirectional DC/DC, 1 central controller and 1 set of local monitoring master station are configured in the secondary aspect, the central controller and the local monitoring master station are used for monitoring and controlling the running state of the transformer area interconnection system in real time, and meanwhile, an optimized scheduling instruction is assigned to the interconnection system based on prediction data. Meanwhile, a plurality of auxiliary devices such as rapid protection, metering, direct current screens and cables are configured, so that the flexible interconnected container system can work normally.
The flexible interconnected container is characterized in internal secondary communication:
1) the central controller is respectively communicated with K11, K12, K13, K14, K21, K22, K23, K24, K51, K52, K53 and K54 in 3 JP cabinets in a mode of converting RS-485 optical fibers into RS-485, so that the remote control functions of remote signaling, remote measuring and remote control are realized;
2) the central controller is communicated with 3 DC/AC respectively in an RS-485 mode to obtain the state quantity and the analog quantity of the converter, and simultaneously, the control mode and the start and stop of the converter are remotely controlled, and the output power of the converter is remotely measured to realize the four-remote function;
3) the central controller communicates with the direct-current switch cabinet in an RS-485 mode to acquire the state quantity of the direct-current incoming and outgoing line switches, and simultaneously remotely controls the direct-current incoming and outgoing line switches to realize a two-remote function;
4) the central controller communicates with the local monitoring master station in an Ethernet mode, on one hand, the local monitoring master station acquires real-time operation information of the platform area interconnection system from the central controller, on the other hand, the central controller receives optimization instructions of the local master station in different time scales, and sends each terminal device after verification;
5) and the central controller uploads partial data of the flexible interconnection system of the partial station area to the master station of the IV area in a wireless mode through hard encryption of a chip and soft encryption of an I-type network management.
The present invention also provides an operation control system 200 for a flexible interconnection system of a platform region, as shown in fig. 4, including:
the mapping unit 201 performs hierarchical control on the flexible interconnection system of the transformer area, where the hierarchical control includes: the system comprises an optimal control, a unified control and an in-place control, wherein the optimal control maps a local monitoring master station of a flexible interconnection system of a platform area, the unified control maps a central controller of the flexible interconnection system of the platform area, and the in-place control maps an equipment layer of the flexible interconnection system of the platform area;
the first hierarchical control unit 202 is used for determining that when the flexible interconnection system of the transformer area is in the optimal control layer, controlling the local monitoring master station to determine a multi-time scale optimization instruction of a current control plan of the flexible interconnection system of the transformer area according to different time scale predicted values, and controlling the transformer area to operate to a control target according to the multi-time scale optimization instruction;
the second hierarchical control unit 203 is used for determining that when the flexible interconnection system of the transformer area is in the unified control layer, controlling the central controller to collect the state quantity and the analog quantity of the equipment layer, performing logical operation on the state quantity and the analog quantity to obtain a logical operation result, and performing real-time control on the operation action of the flexible interconnection system of the transformer area according to the logical operation result;
and the third hierarchical control unit 204 determines that when the flexible interconnection system of the transformer area is in the local control layer, the local side response control is performed by using the control device layer according to the reference voltage and power instruction received by the outer ring.
Wherein the control target includes: the load balancing, peak clipping and valley filling, VPP and/or power supply reliability between the station areas meet preset requirements.
Wherein the operation action comprises: the method comprises the steps of power flow controller start-stop action, power flow controller cascade coordination action, system cooperation action and/or system operation action.
Wherein, the response control of the local side comprises the following steps: selecting a control operation mode to perform ground side response control according to the arrangement and combination result of the platform area triggering conditions;
wherein different operation modes map different cooperative control strategies and sequential control logic.
Wherein, the operation mode includes:
the method comprises the following steps of (1) an economic operation mode, wherein the triggering conditions of the economic operation mode are as follows: when the load rates of the transformer areas are lower than 60%, controlling the batteries of the transformer areas to charge and discharge according to the peak-valley electricity prices of the places where the transformer areas are located, enabling the AC/DC and the DC/DC of the transformer areas to operate in a constant power control mode, and evenly dividing the stored energy charge and discharge power;
a balanced load operation mode 1, wherein the trigger conditions of the balanced load operation mode 1 are as follows: when the load rate of any one of the transformer areas is greater than 60%, the rest transformer areas jointly store energy for load balancing, the transformer areas with the load rate greater than 60% are subjected to load balancing, the AC/DC of any one of the rest transformer areas is selected as a voltage source to perform a constant DC side voltage control mode, the AC/DC and the DC/DC of any one of the rest transformer areas are selected to operate in a constant power control mode, and the AC/DC of the transformer areas with the load rate greater than 60% operates in the constant power control mode;
a balanced load operation mode 2, wherein the trigger conditions of the balanced load operation mode 2 are as follows: when the load rate of any one of the transformer areas is less than 60%, the residual transformer area combined energy storage is uniformly loaded, the transformer area AC/DC with the load rate less than 60% is controlled to be used as a voltage source to operate in a constant direct current side bus voltage control mode, the DC/DC operates in a constant power control mode, and the residual transformer area AC/DC operates in a constant power control mode;
the power-off switching operation mode 1 comprises the following triggering conditions: when one of the transformer areas loses power, the remaining transformer areas jointly store energy to supply power to the power-losing transformer areas, the AC/DC of any one of the remaining transformer areas is selected as a voltage source to operate in a constant direct current side bus voltage control mode, the DC/DC and the other AC/DC operate in a constant power control mode, and the power-losing transformer areas AC/DC operate in a VF control mode;
before the power is supplied to the power-losing station area in the VF control mode, whether a feeder load is cut off or not is judged according to a moment load rate on the power-losing station area;
a power-off switching operation mode 2, wherein the triggering conditions of the power-off switching operation mode 2 are as follows:
when any one of the transformer areas is not in power loss, the rest transformer areas jointly store energy to supply power to the power loss transformer area, the AC/DC of the rest transformer areas as a voltage source operates in a constant direct current bus voltage control mode, the stored DC/DC operates in a constant power control mode, and the power loss transformer area AC/DC operates in a VF control mode;
a shutdown mode, wherein the triggering conditions of the shutdown mode are as follows: when the power of the transformer area is lost, the system is shut down.
The invention has the advantages of advancement in real-time power control, lower construction cost and advancement in advanced application on the premise of realizing the application of the same function.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the application can be implemented by adopting various computer languages, such as object-oriented programming language Java and transliterated scripting language JavaScript.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (12)
1. An operation control method for a flexible interconnection system of a platform area, the method comprising:
hierarchical control of a flexible interconnection system of a distribution room
When the flexible interconnection system of the transformer area is in the optimal control layer, determining a multi-time scale optimization instruction of a current control plan of the flexible interconnection system of the transformer area by using the local monitoring master station according to different time scale predicted values, and controlling the transformer area to run to a control target according to the multi-time scale optimization instruction;
when the flexible interconnection system of the transformer area is at the unified control layer, a central controller is used for collecting state quantity and analog quantity of an equipment layer, carrying out logic operation on the state quantity and the analog quantity to obtain a logic operation result, and carrying out real-time control on the operation action of the flexible interconnection system of the transformer area according to the logic operation result;
when the flexible interconnection system of the transformer area is positioned at the local control layer, the control equipment layer carries out local side response control according to the reference voltage and the power instruction received by the outer ring.
2. The method of claim 1, the control objective comprising at least one of: the load balancing, peak clipping and valley filling, VPP and/or power supply reliability between the station areas meet preset requirements.
3. The method of claim 1, the act of running comprising at least one of: the method comprises the steps of power flow controller start-stop action, power flow controller cascade coordination action, system cooperation action and/or system operation action.
4. The method of claim 1, the on-site side response control, comprising: selecting a control operation mode to perform ground side response control according to the arrangement and combination result of the platform area triggering conditions;
wherein different operation modes map different cooperative control strategies and sequential control logic.
5. The method of claim 4, the run mode, comprising:
the method comprises the following steps of (1) an economic operation mode, wherein the triggering conditions of the economic operation mode are as follows: when the load rates of the transformer areas are lower than 60%, controlling the batteries of the transformer areas to charge and discharge according to the peak-valley electricity prices of the places where the transformer areas are located, enabling the AC/DC and the DC/DC of the transformer areas to operate in a constant power control mode, and evenly dividing the stored energy charge and discharge power;
a balanced load operation mode 1, wherein the trigger conditions of the balanced load operation mode 1 are as follows: when the load rate of any one of the transformer areas is greater than 60%, the rest transformer areas jointly store energy for load balancing, the transformer areas with the load rate greater than 60% are subjected to load balancing, the AC/DC of any one of the rest transformer areas is selected as a voltage source to perform a constant DC side voltage control mode, the AC/DC and the DC/DC of any one of the rest transformer areas are selected to operate in a constant power control mode, and the AC/DC of the transformer areas with the load rate greater than 60% operates in the constant power control mode;
a balanced load operation mode 2, wherein the trigger conditions of the balanced load operation mode 2 are as follows: when the load rate of any one of the transformer areas is less than 60%, the residual transformer area combined energy storage is uniformly loaded, the transformer area AC/DC with the load rate less than 60% is controlled to be used as a voltage source to operate in a constant direct current side bus voltage control mode, the DC/DC operates in a constant power control mode, and the residual transformer area AC/DC operates in a constant power control mode;
the power-off switching operation mode 1 comprises the following triggering conditions: when one of the transformer areas loses power, the remaining transformer areas jointly store energy to supply power to the power-losing transformer areas, the AC/DC of any one of the remaining transformer areas is selected as a voltage source to operate in a constant direct current side bus voltage control mode, the DC/DC and the other AC/DC operate in a constant power control mode, and the power-losing transformer areas AC/DC operate in a VF control mode;
before the power is supplied to the power-losing station area in the VF control mode, whether a feeder load is cut off or not is judged according to a moment load rate on the power-losing station area;
a power-off switching operation mode 2, wherein the triggering conditions of the power-off switching operation mode 2 are as follows:
when any one of the transformer areas is not in power loss, the rest transformer areas jointly store energy to supply power to the power loss transformer area, the AC/DC of the rest transformer areas as a voltage source operates in a constant direct current bus voltage control mode, the stored DC/DC operates in a constant power control mode, and the power loss transformer area AC/DC operates in a VF control mode;
a shutdown mode, wherein the triggering conditions of the shutdown mode are as follows: when the power of the transformer area is lost, the system is shut down.
6. The method of claim 1, the hierarchical control comprising: the system comprises an optimal control system, a unified control system and an in-place control system, wherein the optimal control system maps a local monitoring master station of a flexible interconnection system of a platform area, the unified control system maps a central controller of the flexible interconnection system of the platform area, and the in-place control system maps an equipment layer of the flexible interconnection system of the platform area.
7. An operational control system for a flexible interconnection system of a platform, the system comprising:
the mapping unit is used for carrying out hierarchical control on the flexible interconnection system of the transformer area;
the first hierarchical control unit is used for determining that when the flexible interconnection system of the transformer area is in the optimal control layer, controlling the local monitoring master station to determine a multi-time scale optimization instruction of a current control plan of the flexible interconnection system of the transformer area according to different time scale predicted values, and controlling the transformer area to operate to a control target according to the multi-time scale optimization instruction;
the second hierarchical control unit is used for controlling the central controller to acquire the state quantity and the analog quantity of the equipment layer, performing logical operation on the state quantity and the analog quantity to acquire a logical operation result and controlling the operation action of the flexible interconnection system of the transformer area in real time according to the logical operation result when the flexible interconnection system of the transformer area is in the unified control layer;
and the third hierarchical control unit is used for determining that when the flexible interconnection system of the transformer area is positioned at the local control layer, the control equipment layer is used for carrying out local response control according to the reference voltage and the power instruction received by the outer ring.
8. The system of claim 7, the control objectives of the first hierarchical control unit comprising at least one of: the load balancing, peak clipping and valley filling, VPP and/or power supply reliability between the station areas meet preset requirements.
9. The system of claim 7, the second hierarchical control unit operational action comprising at least one of: the method comprises the steps of power flow controller start-stop action, power flow controller cascade coordination action, system cooperation action and/or system operation action.
10. The system of claim 7, wherein the local side response control of the third hierarchical control unit selects the operation mode of the control to perform the local side response control according to the permutation and combination result of the platform zone triggering conditions;
different operating modes map different cooperative control strategies and sequential control logic.
11. The system of claim 10, the run mode, comprising:
the method comprises the following steps of (1) an economic operation mode, wherein the triggering conditions of the economic operation mode are as follows: when the load rates of the transformer areas are lower than 60%, controlling the batteries of the transformer areas to charge and discharge according to the peak-valley electricity prices of the places where the transformer areas are located, enabling the AC/DC and the DC/DC of the transformer areas to operate in a constant power control mode, and evenly dividing the stored energy charge and discharge power;
a balanced load operation mode 1, wherein the trigger conditions of the balanced load operation mode 1 are as follows: when the load rate of any one of the transformer areas is greater than 60%, the rest transformer areas jointly store energy for load balancing, the transformer areas with the load rate greater than 60% are subjected to load balancing, the AC/DC of any one of the rest transformer areas is selected as a voltage source to perform a constant DC side voltage control mode, the AC/DC and the DC/DC of any one of the rest transformer areas are selected to operate in a constant power control mode, and the AC/DC of the transformer areas with the load rate greater than 60% operates in the constant power control mode;
a balanced load operation mode 2, wherein the trigger conditions of the balanced load operation mode 2 are as follows: when the load rate of any one of the transformer areas is less than 60%, the residual transformer area combined energy storage is uniformly loaded, the transformer area AC/DC with the load rate less than 60% is controlled to be used as a voltage source to operate in a constant direct current side bus voltage control mode, the DC/DC operates in a constant power control mode, and the residual transformer area AC/DC operates in a constant power control mode;
the power-off switching operation mode 1 comprises the following triggering conditions: when one of the transformer areas loses power, the remaining transformer areas jointly store energy to supply power to the power-losing transformer areas, the AC/DC of any one of the remaining transformer areas is selected as a voltage source to operate in a constant direct current side bus voltage control mode, the DC/DC and the other AC/DC operate in a constant power control mode, and the power-losing transformer areas AC/DC operate in a VF control mode;
before the power is supplied to the power-losing station area in the VF control mode, whether a feeder load is cut off or not is judged according to a moment load rate on the power-losing station area;
a power-off switching operation mode 2, wherein the triggering conditions of the power-off switching operation mode 2 are as follows:
when any one of the transformer areas is not in power loss, the rest transformer areas jointly store energy to supply power to the power loss transformer area, the AC/DC of the rest transformer areas as a voltage source operates in a constant direct current bus voltage control mode, the stored DC/DC operates in a constant power control mode, and the power loss transformer area AC/DC operates in a VF control mode;
a shutdown mode, wherein the triggering conditions of the shutdown mode are as follows: when the power of the transformer area is lost, the system is shut down.
12. The system of claim 7, the hierarchical control of the mapping unit comprising: the system comprises an optimal control system, a unified control system and an in-place control system, wherein the optimal control system maps a local monitoring master station of a flexible interconnection system of a platform area, the unified control system maps a central controller of the flexible interconnection system of the platform area, and the in-place control system maps an equipment layer of the flexible interconnection system of the platform area.
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| CN202110015459.9A CN112821436A (en) | 2021-01-05 | 2021-01-05 | Operation control method and system for flexible interconnection system of transformer area |
| PCT/CN2021/141375 WO2022148258A1 (en) | 2021-01-05 | 2021-12-24 | Operation control method and system for court flexible interconnection system |
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