CN117117875A - Power grid system control method, device, equipment and medium - Google Patents
Power grid system control method, device, equipment and medium Download PDFInfo
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- CN117117875A CN117117875A CN202311369994.XA CN202311369994A CN117117875A CN 117117875 A CN117117875 A CN 117117875A CN 202311369994 A CN202311369994 A CN 202311369994A CN 117117875 A CN117117875 A CN 117117875A
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- 238000004590 computer program Methods 0.000 claims description 11
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Classifications
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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
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/40—Synchronising a generator for connection to a network or to another generator
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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Abstract
The invention discloses a control method, a device, equipment and a medium of a power grid system, which relate to the technical field of power distribution network control, respond to a received regulation and control request, acquire corresponding interaction information and target power data of the power grid system, determine a fault state corresponding to a first flexible multi-state switch in the power grid system based on the interaction information and the target power data, match a corresponding fault exit strategy according to the fault state, execute fault exit operation on the power grid system according to the fault exit strategy, detect whether an alternating current breaker between a passive port and the passive power grid is in a switching-off state when the first flexible multi-state switch receives a start-up instruction, and start and connect an active power grid and the passive power grid according to a switching-off state detection result of the alternating current breaker between the passive port and the passive power grid; the technical problem that manual intervention operation is usually required for a regulation and control means adopted by a power distribution network system formed by a conventional active power grid and a conventional passive power grid is solved.
Description
Technical Field
The present invention relates to the field of power distribution network control technologies, and in particular, to a method, an apparatus, a device, and a medium for controlling a power grid system.
Background
The distribution network refers to a power network that receives electric energy from a power transmission network or a regional power plant, and distributes the electric energy locally or step by step according to voltage through a distribution facility.
At present, the existing power distribution network is facing great challenges in aspects of customization and diversification of power demand, large-scale access of distributed power sources, complex coordination control of power flow and the like, and higher requirements are provided for the guarantee means of the power quality and the power supply reliability of the tail end of the multi-energy storage power distribution network of the new energy power distribution network. However, the regulation and control means adopted by the power distribution network system formed by the conventional active power network and the passive power network generally need manual intervention operation, so that the power distribution network is coordinately controlled, and the requirements are difficult to meet.
Disclosure of Invention
The invention provides a power grid system control method, a device, equipment and a medium, which solve the technical problem that the regulation and control means adopted by the power distribution network system formed by a conventional active power grid and a passive power grid usually need manual intervention operation.
The invention provides a control method of a power grid system, the power grid system comprises an active power grid and a passive power grid, the active power grid is connected with the passive power grid through a plurality of flexible multi-state switches, the flexible multi-state switches comprise a plurality of ports, the ports comprise active ports and passive ports, a plurality of the ports are connected through bus bars, the plurality of flexible multi-state switches comprise a first flexible multi-state switch and a second flexible multi-state switch, the method comprises:
Responding to the received regulation request, and acquiring interaction information and target power data corresponding to the power grid system;
determining a fault state corresponding to the first flexible multi-state switch in the power grid system based on the interaction information and the target power data;
matching a corresponding fault exit strategy according to the fault state, and executing fault exit operation on the power grid system according to the fault exit strategy;
when the first flexible multi-state switch receives a start-up input instruction, detecting whether an alternating current breaker between the passive port and the passive power grid is in a brake-off state or not;
and according to a detection result of the opening state of the alternating current circuit breaker between the passive port and the passive power grid, the active power grid and the passive power grid are started to be connected.
Optionally, the method further comprises:
detecting the number of power grid paths between the active power grid and the passive power grid in real time;
when the number of the power grid channels is larger than or equal to the number of the preset standard channels, switching the first flexible multi-state switch or the second flexible multi-state switch into a cold standby state according to a second preset disconnection sequence;
And when the number of the power grid channels is smaller than the preset standard channel number, generating a locking shutdown instruction.
Optionally, the fault state includes a dc bus fault, an active port fault, and a passive port fault, and the step of matching a corresponding fault exit policy according to the fault state, and executing a fault exit operation on the power grid system according to the fault exit policy includes:
when the fault state is the direct current bus fault, executing a direct current bus fault exit strategy;
when the fault state is the active port fault, executing an active port fault exit strategy;
and when the fault state is the passive port fault, executing a passive port fault exit strategy.
Optionally, when the fault state is the dc bus fault, executing a dc bus fault exit policy includes:
when the fault state is that the direct current bus fails, all direct current breakers between the active port and the passive port are disconnected, and the active port is switched into a reactive control mode;
detecting the running state of the second flexible multi-state switch in real time;
when the second flexible multi-state switch is detected to be in a normal running state, the passive port is switched to a reactive power control mode;
When the second flexible multi-state switch is detected to be in an out-of-operation state, the alternating current breaker and the alternating current isolation disconnecting link between the passive port and the passive power grid are disconnected according to a first preset disconnection sequence, and the passive port is switched to a cold standby state.
Optionally, when the fault state is the active port fault, the step of executing an active port fault exit policy includes:
when the fault state is that the active port is faulty, all direct current breakers between the active port and the passive port are disconnected, and an alternating current breaker and an alternating current isolation disconnecting link between the active port and the active power grid are disconnected according to a first preset disconnection sequence, wherein the active port is switched to a cold standby state;
detecting the running state of the second flexible multi-state switch in real time;
when the second flexible multi-state switch is detected to be in a normal running state, the passive port is switched to a reactive power control mode;
when the second flexible multi-state switch is detected to be in an out-of-operation state, the alternating current breaker and the alternating current isolation disconnecting link between the passive port and the passive power grid are disconnected according to the first preset disconnection sequence, and the passive port is switched to a cold standby state.
Optionally, when the fault state is the passive port fault, the step of executing a passive port fault exit policy includes:
and when the fault state is that the passive port is faulty, all direct current breakers between the active port and the passive port are disconnected, and the alternating current breakers and alternating current isolation disconnecting switches between the passive port and the passive power grid are disconnected according to a first preset disconnection sequence, the passive port is switched to a cold standby state, and the active port is switched to a reactive control mode.
Optionally, the step of starting connection between the active power grid and the passive power grid according to the detection result of the opening state of the ac circuit breaker between the passive port and the passive power grid includes:
if the alternating current circuit breaker between the passive port and the passive power grid is in a switching-off state, switching on all alternating current isolation disconnecting switches between the active power grid and the passive power grid according to a first preset switching-on sequence;
when the first flexible multi-state switch is detected to meet a preset charging condition, switching on an alternating current breaker between the active port and the active power grid;
detecting the running state of the second flexible multi-state switch in real time;
When the second flexible multi-state switch is detected to be in an out-of-operation state, switching on an alternating current breaker between the passive port and the passive power grid;
when detecting that the second flexible multi-state switch is in a normal running state, detecting VF power data of the first flexible multi-state switch in real time;
and when the VF power data is in a preset threshold interval, switching on an alternating current breaker between the passive port and the passive power grid.
The invention provides a control device of a power grid system, the power grid system comprises an active power grid and a passive power grid, the active power grid is connected with the passive power grid through a plurality of flexible multi-state switches, the flexible multi-state switches comprise a plurality of ports, the ports comprise active ports and passive ports, a plurality of the ports are connected through bus bars, the plurality of flexible multi-state switches comprise a first flexible multi-state switch and a second flexible multi-state switch, the device comprises:
the response module is used for responding to the received regulation and control request and acquiring interaction information and target power data corresponding to the power grid system;
the fault state module is used for determining a fault state corresponding to the first flexible multi-state switch in the power grid system based on the interaction information and the target power data;
The fault exit module is used for matching a corresponding fault exit strategy according to the fault state and executing fault exit operation on the power grid system according to the fault exit strategy;
the input starting module is used for detecting whether the alternating current circuit breaker between the passive port and the passive power grid is in a switching-off state or not when the first flexible multi-state switch receives an input starting instruction;
and the power grid starting connection module is used for starting and connecting the active power grid with the passive power grid according to the detection result of the opening state of the alternating current circuit breaker between the passive port and the passive power grid.
An electronic device according to a third aspect of the present invention includes a memory and a processor, where the memory stores a computer program, and the computer program when executed by the processor causes the processor to execute the steps of the grid system control method according to any one of the above.
A fourth aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed, implements a grid system control method as set forth in any one of the preceding claims.
From the above technical scheme, the invention has the following advantages:
Responding to the received regulation and control request, acquiring interaction information and target power data corresponding to a power grid system, determining a fault state corresponding to a first flexible multi-state switch in the power grid system based on the interaction information and the target power data, matching a corresponding fault exit strategy according to the fault state, executing fault exit operation on the power grid system according to the fault exit strategy, detecting whether an alternating current breaker between a passive port and the passive power grid is in a brake-off state or not when the first flexible multi-state switch receives a start-up instruction, and starting and connecting an active power grid and the passive power grid according to a brake-off state detection result of the alternating current breaker between the passive port and the passive power grid; the technical problem that manual intervention operation is usually required for a regulation and control means adopted by a power distribution network system formed by a conventional active power grid and a conventional passive power grid is solved; the flexible multi-state switch is used for collecting and controlling in real time, and the automatic control of the passive power grid is realized through the formed power grid system control framework, so that the manual intervention operation is reduced, and the safe and stable operation of the power distribution network is ensured.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a flowchart of a step of a power grid system control method according to a first embodiment of the present invention;
fig. 2 is a flowchart of a step of a power grid system control method according to a second embodiment of the present invention;
fig. 3 is a schematic diagram of a power grid system formed by an active power grid and a passive power grid according to a second embodiment of the present invention;
FIG. 4 is a flowchart of a fault exit operation provided in a second embodiment of the present invention;
FIG. 5 is a flowchart of a start-up operation of the second embodiment of the present invention;
fig. 6 is a block diagram of a power grid system control device according to a third embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a power grid system control method, a device, equipment and a medium, which are used for solving the technical problem that a regulation and control means adopted by a power distribution network system formed by a conventional active power grid and a passive power grid usually needs manual intervention operation.
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating steps of a power grid system control method according to an embodiment of the invention.
The invention provides a control method of a power grid system, wherein the power grid system comprises an active power grid and a passive power grid, the active power grid is connected with the passive power grid through a plurality of flexible multi-state switches, each flexible multi-state switch comprises a plurality of ports, each port comprises an active port and a passive port, the ports are connected through a bus bar, each flexible multi-state switch comprises a first flexible multi-state switch and a second flexible multi-state switch, and the method comprises the following steps:
and step 101, responding to the received regulation and control request, and acquiring interaction information and target power data corresponding to the power grid system.
The regulation request refers to a request instruction for regulating and controlling a power grid system.
The power grid system comprises an active power grid and a passive power grid, wherein the active power grid is connected with the passive power grid through a plurality of flexible multi-state switches, each flexible multi-state switch comprises a plurality of ports, each port comprises an active port and a passive port, and the ports are connected through a bus bar; the power grid system of the power distribution network system control network framework is established by an active power grid, a passive power grid and a flexible multi-state switch.
It is worth mentioning that the flexible multi-state switch is multiport, and the electric network system includes active electric network and passive electric network, and the passive electric network only has new energy power station, can not independently constitute electric network voltage.
The interaction information refers to information required by interaction of the flexible multi-state switch with power distribution network system equipment through a control network architecture, and comprises, but is not limited to, line switch states, flexible multi-state switch running states, flexible multi-state switch start-stop permission conditions and breaker opening and closing permission conditions, and reference information used for judging whether faults occur in a direct current bus, an active port and a passive port in a power grid system.
The target power data refers to power data for determining a fault state corresponding to the first flexible multi-state switch, and includes, but is not limited to, dc bus voltage and current (e.g., dc voltage imbalance), voltage and current of the active port device (dc or ac voltage, current), and voltage and current of the passive port device (dc or ac voltage, current), and other electrical quantity signals.
In the embodiment of the invention, in response to receiving a request instruction for regulating and controlling a power grid system, interaction information and target power data corresponding to the power grid system are acquired.
Step 102, determining a fault state corresponding to the first flexible multi-state switch in the power grid system based on the interaction information and the target power data.
According to the embodiment of the invention, the fault state corresponding to the first flexible multi-state switch in the power grid system is determined according to the detected electrical quantity signals such as voltage, current and the like and the interactive reference information; it is worth mentioning that, in the electric wire netting system, the electric quantity information of direct current busbar, active port and passive port is detected through controlling and protecting integrative device.
Step 103, matching the corresponding fault exit strategy according to the fault state, and executing fault exit operation on the power grid system according to the fault exit strategy.
The fault exit strategy refers to that the flexible multi-state switch adopts a control and protection integrated device, the control and protection integrated device detects fault information in real time based on an interlocking fault identification method, and when a fault is detected, a control program of the control and protection integrated device starts different strategies to realize that the power grid system achieves the optimal running state when the flexible multi-state fault exits.
The interlocking fault identification method is to judge the starting interlocking condition, or prohibit the switch from opening, or start the power mutual-aid transfer, or cut off the detailed load, etc. through the current fault state of the equipment, and start different strategies and control flows.
The control and protection integrated device is a device which integrates related protection, measurement and control functions in an intelligent substation power system or integrates a merging unit and an intelligent terminal function on the basis. The device can provide protection, measurement, monitoring and control functions for application objects, and can also provide sampling value output and GOOSE receiving and transmitting functions.
In the embodiment of the invention, the corresponding fault exit strategy is matched according to the fault state, and the fault exit operation is executed on the power grid system based on the fault exit strategy.
And 104, detecting whether the alternating current circuit breaker between the passive port and the passive power grid is in a switching-off state or not when the first flexible multi-state switch receives a start-up input instruction.
It is worth mentioning that the first flexible multi-state switch exits due to faults, when an operator completes fault processing and issues a fault restarting command, and puts the first flexible multi-state switch into self-starting control, the first flexible multi-state switch enters a starting control strategy, and the non-synchronization of the voltage and the frequency of the passive power grid in the passive power grid multipoint control is avoided.
In the embodiment of the invention, when the first flexible multi-state switch receives a start-up instruction, whether an alternating current breaker between a passive port and a passive power grid is in a switching-off state or not is detected.
And 105, starting and connecting the active power grid and the passive power grid according to a detection result of the opening state of the alternating current circuit breaker between the passive port and the passive power grid.
In the embodiment of the invention, the active power grid and the passive power grid are started to be connected according to the detection result of the opening state of the alternating current breaker between the passive port and the passive power grid. And the first flexible multi-state switch is connected to the active power grid and the passive power grid in a non-differential way.
In the invention, interaction information and target power data corresponding to a power grid system are obtained in response to a received regulation and control request, a fault state corresponding to a first flexible multi-state switch in the power grid system is determined based on the interaction information and the target power data, a corresponding fault exit strategy is matched according to the fault state, a fault exit operation is executed on the power grid system according to the fault exit strategy, when the first flexible multi-state switch receives a start-up instruction, whether an alternating current breaker between a passive port and the passive power grid is in a switching-off state is detected, and an active power grid is connected with the passive power grid in a starting manner according to a switching-off state detection result of the alternating current breaker between the passive port and the passive power grid; the technical problem that manual intervention operation is usually required for a regulation and control means adopted by a power distribution network system formed by a conventional active power grid and a conventional passive power grid is solved; the flexible multi-state switch is used for collecting and controlling in real time, and the automatic control of the passive power grid is realized through the formed power grid system control framework, so that the manual intervention operation is reduced, and the safe and stable operation of the power distribution network is ensured.
Referring to fig. 2, fig. 2 is a flowchart illustrating steps of a power grid system control method according to a second embodiment of the present invention.
The invention provides a control method of a power grid system, wherein the power grid system comprises an active power grid and a passive power grid, the active power grid is connected with the passive power grid through a plurality of flexible multi-state switches, each flexible multi-state switch comprises a plurality of ports, each port comprises an active port and a passive port, the ports are connected through a bus bar, each flexible multi-state switch comprises a first flexible multi-state switch and a second flexible multi-state switch, and the method comprises the following steps:
step 201, in response to the received regulation request, interaction information and target power data corresponding to the power grid system are obtained.
In the embodiment of the present invention, the implementation process of step 201 is similar to that of step 101, and will not be repeated here.
Step 202, determining a fault state corresponding to a first flexible multi-state switch in the power grid system based on the interaction information and the target power data.
In the embodiment of the present invention, the implementation process of step 202 is similar to that of step 102, and will not be repeated here.
Step 203, matching the corresponding fault exit strategy according to the fault state, and executing fault exit operation on the power grid system according to the fault exit strategy.
It should be noted that referring to fig. 3, in this embodiment, taking 2 flexible multi-state switches as an example, the first flexible multi-state switch includes an active port 1 and a passive port 2, a Q1 ac isolation switch, a Q2 ac breaker and a Q3 ac isolation switch are disposed between the active port and the active power grid, a Q4 dc breaker and a Q5 dc breaker are disposed between the active port and the passive port, and a Q6 ac isolation switch, a Q7 ac breaker and a Q8 ac isolation switch are disposed between the passive port and the passive power grid.
Further, the fault conditions include dc bus faults, active port faults, and passive port faults, and step 203 may include the sub-steps of:
referring to fig. 4, step 203 is a fault exit operation flow, as follows:
and S11, executing a direct current bus fault exit strategy when the fault state is the direct current bus fault.
Further, S11 may comprise the sub-steps of:
and S111, when the fault state is a direct current bus fault, all direct current breakers between the active port and the passive port are disconnected, and the active port is switched into a reactive control mode.
In the embodiment of the invention, when the first flexible multi-state switch direct current bus is judged to be in fault, the control and protection integrated device breaks the Q4 and Q5 direct current breakers, and switches the active port control mode into the reactive control mode, thereby providing reactive support for the connected power grid system.
Reactive control mode refers to reactive power of the first flexible multi-state switch interacting with the grid system.
S112, detecting the operation state of the second flexible multi-state switch in real time.
In the embodiment of the invention, the control and protection integrated device detects the running state of the second flexible multi-state switch in real time through a control network of the power grid system.
And S113, when the second flexible multi-state switch is detected to be in a normal operation state, switching the passive port into a reactive control mode.
In the embodiment of the invention, when the second flexible multi-state switch normally operates, the control and protection integrated device switches the passive port control mode into the reactive control mode, and reactive support is provided for the connected power grid system.
And S114, when the second flexible multi-state switch is detected to be in an out-of-operation state, the alternating current breaker and the alternating current isolation switch between the passive port and the passive power grid are disconnected according to a first preset disconnection sequence, and the passive port is switched to a cold standby state.
The first preset disconnection sequence refers to that the alternating current circuit breaker is disconnected firstly, then the alternating current isolation disconnecting link close to the power grid side is disconnected, and finally the alternating current isolation disconnecting link close to the port side is disconnected.
In the embodiment of the invention, when the control and protection integrated device detects that the second flexible multi-state switch is out of operation, the control and protection integrated device controls the passive port to disconnect Q7, Q8 and Q6 according to the first preset disconnection sequence, the passive port is switched to a cold standby state, meanwhile, a passive power grid fault is transmitted to a new energy power station control system through a power grid system control network, and the new energy power station executes shutdown operation.
And S12, when the fault state is an active port fault, executing an active port fault exit strategy.
Further, S12 may comprise the sub-steps of:
s121, when the fault state is an active port fault, all direct current breakers between the active port and the passive port are disconnected, and an alternating current breaker and an alternating current isolation disconnecting link between the active port and an active power grid are disconnected according to a first preset disconnection sequence, and the active port is switched to a cold standby state.
In the embodiment of the invention, when the active port is judged, the control and protection integrated device disconnects the Q4 and Q5 direct current breakers, and disconnects the active port Q2, Q1 and Q3 according to a first preset disconnection sequence, and switches the active port to a cold standby state.
S122, detecting the operation state of the second flexible multi-state switch in real time.
In the embodiment of the invention, the control and protection integrated device detects the running state of the second flexible multi-state switch in real time through a control network of the power grid system.
And S123, when the second flexible multi-state switch is detected to be in a normal operation state, switching the passive port into a reactive control mode.
In the embodiment of the invention, when the second flexible multi-state switch normally operates, the control and protection integrated device switches the passive port control mode into reactive control so as to provide reactive support for a connected power grid system.
And S124, when the second flexible multi-state switch is detected to be in an out-of-operation state, the alternating current breaker and the alternating current isolation disconnecting link between the passive port and the passive power grid are disconnected according to a first preset disconnection sequence, and the passive port is switched to a cold standby state.
In the embodiment of the invention, when the control and protection integrated device detects that the second flexible multi-state switch is out of operation, the control and protection integrated device controls the passive port to disconnect Q7, Q8 and Q6 according to the first preset disconnection sequence, the passive port is switched to a cold standby state, meanwhile, a passive power grid fault is transmitted to a new energy power station control system through a power grid system control network, and the new energy power station executes shutdown operation.
And S13, executing a passive port fault exit strategy when the fault state is a passive port fault.
Further, S13 may include the following sub-steps:
s131, when the fault state is a passive port fault, all direct current breakers between the active port and the passive port are disconnected, and the alternating current breakers and alternating current isolation disconnecting switches between the passive port and the passive power grid are disconnected according to a first preset disconnection sequence, the passive port is switched to a cold standby state, and the active port is switched to a reactive control mode.
In the embodiment of the invention, when judging that the passive port fails, the control and protection integrated device disconnects the Q4 and Q5 direct current breakers, controls the passive port to disconnect the Q7, the Q8 and the Q6 according to the first preset disconnection sequence (the sequence is not wrong), switches the passive port to a cold standby state, switches the active port control mode to reactive control, and provides reactive support for the connected power grid system.
And 204, detecting whether the alternating current circuit breaker between the passive port and the passive power grid is in a switching-off state or not when the first flexible multi-state switch receives a start-up input instruction.
It is worth mentioning that the first flexible multi-state switch exits due to faults, when an operator completes fault processing and issues a fault restarting command, and puts the first flexible multi-state switch into self-starting control, the first flexible multi-state switch enters a starting control strategy, and the non-synchronization of the voltage and the frequency of the passive power grid in the passive power grid multipoint control is avoided.
In the embodiment of the invention, when the first flexible multi-state switch receives a start-up instruction, whether an alternating current breaker between a passive port and a passive power grid is in a switching-off state or not is detected.
And 205, starting and connecting the active power grid and the passive power grid according to a detection result of the opening state of the alternating current circuit breaker between the passive port and the passive power grid.
Referring to fig. 5, step 205 is to put into the start-up operation flow as follows:
further, step 205 may comprise the sub-steps of:
it should be noted that step 205 detects the active power grid and the passive power grid paths in real time through the "connection network identification method". The connection network identification method refers to detecting connection passing between an active power grid and a passive power grid. And judging whether the active power grid and the passive power grid are connected through the multi-state switch passage after detecting whether the circuit breakers and the isolating knife switches on two sides of the multi-state switch are in switching-on state and whether the multi-state switch is in operation synthesis.
And S21, if the alternating current circuit breaker between the passive port and the passive power grid is in a switching-off state, switching on all alternating current isolation disconnecting switches between the active power grid and the passive power grid according to a first preset switching-on sequence.
The first preset closing sequence refers to firstly closing an alternating current isolation disconnecting link close to an active port, secondly closing an alternating current isolation disconnecting link close to an active power grid, thirdly closing an alternating current isolation disconnecting link close to a passive port, and finally closing an alternating current isolation disconnecting link close to the passive power grid.
In the embodiment of the invention, if the alternating current circuit breaker between the passive port and the passive power grid is in a switching-off state, Q3, Q1, Q6 and Q8 are switched on according to a first preset switching-on sequence.
And S22, switching on an alternating current breaker between the active port and the active power grid when the first flexible multi-state switch is detected to meet the preset charging condition.
The preset charging condition means that the first flexible multi-state switch has no fault (control protection device, module) and the cooling system is normal.
In the embodiment of the invention, when the first flexible multi-state switch is detected to meet the preset charging condition, an alternating current breaker Q2 between the active port and the active power grid is switched on.
S23, detecting the running state of the second flexible multi-state switch in real time.
In the embodiment of the invention, the control and protection integrated device detects the running state of the second flexible multi-state switch in real time through a control network of the power grid system.
And S24, when the second flexible multi-state switch is detected to be in an out-of-operation state, switching on an alternating current breaker between the passive port and the passive power grid.
In the embodiment of the invention, when the second flexible multi-state switch is detected to be in the out-of-operation state, the alternating current breaker Q7 between the passive port and the passive power grid is switched on.
And S25, detecting VF power data of the first flexible multi-state switch in real time when the second flexible multi-state switch is detected to be in a normal operation state.
VF power data refers to the voltage and frequency difference between the active and passive grids.
In an embodiment of the invention, when the second flexible multi-state switch is detected to be in a normal operation state,
and S26, when the VF power data is in a preset threshold interval, switching on an alternating current breaker between the passive port and the passive power grid.
In the embodiment of the invention, when VF power data is in a preset threshold interval, an alternating current breaker Q7 between a passive port and a passive power grid is switched on.
It is worth mentioning that in S25-S26, if the passive power grid has already been operated through the second flexible multi-state switch to form the power grid operation, before Q7 is switched on, the voltage amplitude and frequency output by the first flexible multi-state switch are detected, and when the difference is within the threshold, Q7 is automatically switched on, and when the difference exceeds the threshold, the output of the first flexible multi-state switch is regulated to track, so as to realize the non-difference connection of the first flexible multi-state switch to the active power grid and the passive power grid.
Step 206, detecting the number of power grid paths between the active power grid and the passive power grid in real time.
The control and protection integrated device detects states of the flexible multi-state switch 1 and the flexible multi-state switch 2 in real time to generate a linkage locking strategy, and the control and protection integrated device detects a passage of the passive power grid connected to the active power grid through a key path searching method.
The key path searching method refers to whether a multi-state switch must be operated, if so, the multi-state switch is a key path, manual shutdown is not allowed, if a fault shutdown occurs, fault shutdown information is required to be informed to a passive power grid, and the passive fault is removed or isolated network operation is formed.
In an embodiment of the invention, the number of power grid paths between the active power grid and the passive power grid is detected in real time.
And step 207, when the number of the power grid channels is greater than or equal to the number of the preset standard channels, switching the first flexible multi-state switch or the second flexible multi-state switch into a cold standby state according to a second preset disconnection sequence.
The second preset disconnection sequence refers to sequentially disconnecting the direct current breaker, the alternating current breaker and the alternating current isolation disconnecting link, and the disconnection sequence is similar to the above steps and is not repeated here.
In the embodiment of the invention, the number of the preset standard channels is 2, and when the number of the channels is 2 or more, the first flexible multi-state switch or the second flexible multi-state switch can be controlled to be withdrawn to be in a cold standby state through one-key control according to the operation requirement, wherein the first flexible multi-state switch or the second flexible multi-state switch is switched to be in the cold standby state according to a second preset disconnection sequence.
And step 208, when the number of the power grid paths is smaller than the preset standard path number, generating a locking shutdown instruction.
In the embodiment of the invention, when the number of the power grid channels is smaller than the preset standard channel number, a manual opening and closing instruction of the closed alternating current circuit breaker, a manual opening and closing instruction of the closed direct current circuit breaker and an instruction for prohibiting the shutdown of the flexible multi-state switch are generated, and the circuit breaker is prohibited from manually exiting the operation and the instruction for prohibiting the shutdown of the flexible multi-state switch are generated.
In the invention, interaction information and target power data corresponding to a power grid system are obtained in response to a received regulation and control request, a fault state corresponding to a first flexible multi-state switch in the power grid system is determined based on the interaction information and the target power data, a corresponding fault exit strategy is matched according to the fault state, a fault exit operation is executed on the power grid system according to the fault exit strategy, when the first flexible multi-state switch receives a start-up instruction, whether an alternating current breaker between a passive port and the passive power grid is in a switching-off state is detected, and an active power grid is connected with the passive power grid in a starting manner according to a switching-off state detection result of the alternating current breaker between the passive port and the passive power grid; the technical problem that manual intervention operation is usually required for a regulation and control means adopted by a power distribution network system formed by a conventional active power grid and a conventional passive power grid is solved; the flexible multi-state switch is used for collecting and controlling in real time, and the automatic control of the passive power grid is realized through the formed power grid system control framework, so that the manual intervention operation is reduced, and the safe and stable operation of the power distribution network is ensured.
Referring to fig. 6, fig. 6 is a block diagram illustrating a power grid system control device according to a third embodiment of the present invention.
The invention provides a power grid system control device, wherein the power grid system comprises an active power grid and a passive power grid, the active power grid is connected with the passive power grid through a plurality of flexible multi-state switches, each flexible multi-state switch comprises a plurality of ports, each port comprises an active port and a passive port, the ports are connected through a bus bar, each flexible multi-state switch comprises a first flexible multi-state switch and a second flexible multi-state switch, and the device comprises:
the response module 301 is configured to obtain interaction information and target power data corresponding to the power grid system in response to the received regulation request;
the fault state module 302 is configured to determine a fault state corresponding to the first flexible multi-state switch in the power grid system based on the interaction information and the target power data;
the fault exit module 303 is configured to match a corresponding fault exit policy according to the fault state, and execute a fault exit operation on the power grid system according to the fault exit policy;
the input starting module 304 is configured to detect whether an ac breaker between the passive port and the passive power grid is in a switching-off state when the first flexible multi-state switch receives an input starting instruction;
The power grid starting connection module 305 is configured to start and connect the active power grid and the passive power grid according to a detection result of a switching-off state of the ac circuit breaker between the passive port and the passive power grid.
Further, the method further comprises the following steps:
the power grid access number module is used for detecting the number of power grid access between the active power grid and the passive power grid in real time;
the first access operation module is used for switching the first flexible multi-state switch or the second flexible multi-state switch into a cold standby state according to a second preset disconnection sequence when the number of the power grid accesses is larger than or equal to the number of preset standard accesses;
and the second path operation module is used for generating a locking shutdown instruction when the number of the power grid paths is smaller than the preset standard path number.
Further, the fault states include dc bus faults, active port faults, and passive port faults, and the fault exit module 303 includes:
the direct current bus fault exit strategy submodule is used for executing a direct current bus fault exit strategy when the fault state is a direct current bus fault;
the active port fault exit strategy submodule is used for executing an active port fault exit strategy when the fault state is an active port fault;
and the passive port fault exit strategy submodule is used for executing the passive port fault exit strategy when the fault state is the passive port fault.
Further, the dc bus fault exit strategy submodule includes:
the first direct current bus fault operation unit is used for switching off all direct current breakers between the active port and the passive port and switching the active port into a reactive control mode when the fault state is a direct current bus fault;
the second direct current bus fault operation unit is used for detecting the running state of the second flexible multi-state switch in real time;
the third direct current bus fault operation unit is used for switching the passive port into a reactive control mode when the second flexible multi-state switch is detected to be in a normal operation state;
and the fourth direct current bus fault operation unit is used for disconnecting the alternating current breaker and the alternating current isolation disconnecting link between the passive port and the passive power grid according to a first preset disconnection sequence when the second flexible multi-state switch is detected to be in an out-of-operation state, and the passive port is switched to a cold standby state.
Further, the active port failure exit policy submodule includes:
the first active port fault operation unit is used for switching off all direct current breakers between the active port and the passive port when the fault state is an active port fault, switching off an alternating current breaker and an alternating current isolation disconnecting link between the active port and an active power grid according to a first preset switching-off sequence, and switching the active port into a cold standby state;
The second active port fault operation unit is used for detecting the running state of the second flexible multi-state switch in real time;
the third active port fault operation unit is used for switching the passive port into a reactive control mode when the second flexible multi-state switch is detected to be in a normal operation state;
and the fourth active port fault operation unit is used for disconnecting the alternating current breaker and the alternating current isolation disconnecting link between the passive port and the passive power grid according to a first preset disconnection sequence when the second flexible multi-state switch is detected to be in an out-of-operation state, and the passive port is switched to a cold standby state.
Further, the passive port failure exit policy submodule includes:
and the first passive port fault operation unit is used for switching off all direct current breakers between the active port and the passive port when the fault state is the passive port fault, switching off the alternating current breakers and the alternating current isolation disconnecting switches between the passive port and the passive power grid according to a first preset switching-off sequence, switching the passive port into a cold standby state and switching the active port into a reactive control mode.
Further, the grid start connection module 305 includes:
the first power grid promoter module is used for switching on all alternating current isolation disconnecting switches between the active power grid and the passive power grid according to a first preset switching-on sequence if the alternating current circuit breaker between the passive port and the passive power grid is in a switching-off state;
The second power grid promoter module is used for switching on an alternating current breaker between the active port and the active power grid when the first flexible multi-state switch is detected to meet the preset charging condition;
the third power grid promoter module is used for detecting the running state of the second flexible multi-state switch in real time;
the fourth power grid promoter module is used for switching on an alternating current breaker between the passive port and the passive power grid when the second flexible multi-state switch is detected to be in an out-of-operation state;
the fifth power grid promoter module is used for detecting VF power data of the first flexible multi-state switch in real time when detecting that the second flexible multi-state switch is in a normal running state;
and the sixth power grid promoter module is used for switching on the alternating current circuit breaker between the passive port and the passive power grid when the VF power data is in a preset threshold interval.
In the invention, interaction information and target power data corresponding to a power grid system are obtained in response to a received regulation and control request, a fault state corresponding to a first flexible multi-state switch in the power grid system is determined based on the interaction information and the target power data, a corresponding fault exit strategy is matched according to the fault state, a fault exit operation is executed on the power grid system according to the fault exit strategy, when the first flexible multi-state switch receives a start-up instruction, whether an alternating current breaker between a passive port and the passive power grid is in a switching-off state is detected, and an active power grid is connected with the passive power grid in a starting manner according to a switching-off state detection result of the alternating current breaker between the passive port and the passive power grid; the technical problem that manual intervention operation is usually required for a regulation and control means adopted by a power distribution network system formed by a conventional active power grid and a conventional passive power grid is solved; the flexible multi-state switch is used for collecting and controlling in real time, and the automatic control of the passive power grid is realized through the formed power grid system control framework, so that the manual intervention operation is reduced, and the safe and stable operation of the power distribution network is ensured.
An electronic device according to an embodiment of the present invention includes: a memory and a processor, the memory storing a computer program; the computer program, when executed by a processor, causes the processor to perform the grid system control method of any of the embodiments described above.
The memory may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. The memory has memory space for program code to perform any of the method steps described above. For example, the memory space for the program code may include individual program code for implementing the various steps in the above method, respectively. The program code can be read from or written to one or more computer program products. These computer program products comprise a program code carrier such as a hard disk, a Compact Disc (CD), a memory card or a floppy disk. The program code may be compressed, for example, in a suitable form. The code, when executed by a computing processing device, causes the computing processing device to perform the steps in the method described above.
An embodiment of the present application provides a computer-readable storage medium having stored thereon a computer program which, when executed, implements a grid system control method according to any embodiment of the present application.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of controlling a power grid system, the power grid system comprising an active power grid and a passive power grid, the active power grid being connected to the passive power grid by a plurality of flexible multi-state switches, the flexible multi-state switches comprising a plurality of ports, the ports comprising an active port and a passive port, a plurality of the ports being connected by a bus bar, the plurality of flexible multi-state switches comprising a first flexible multi-state switch and a second flexible multi-state switch, the method comprising:
responding to the received regulation request, and acquiring interaction information and target power data corresponding to the power grid system;
determining a fault state corresponding to the first flexible multi-state switch in the power grid system based on the interaction information and the target power data;
Matching a corresponding fault exit strategy according to the fault state, and executing fault exit operation on the power grid system according to the fault exit strategy;
when the first flexible multi-state switch receives a start-up input instruction, detecting whether an alternating current breaker between the passive port and the passive power grid is in a brake-off state or not;
and according to a detection result of the opening state of the alternating current circuit breaker between the passive port and the passive power grid, the active power grid and the passive power grid are started to be connected.
2. The power grid system control method according to claim 1, characterized by further comprising:
detecting the number of power grid paths between the active power grid and the passive power grid in real time;
when the number of the power grid channels is larger than or equal to the number of the preset standard channels, switching the first flexible multi-state switch or the second flexible multi-state switch into a cold standby state according to a second preset disconnection sequence;
and when the number of the power grid channels is smaller than the preset standard channel number, generating a locking shutdown instruction.
3. The method according to claim 1, wherein the fault state includes a dc bus fault, an active port fault, and a passive port fault, and the step of matching a corresponding fault exit policy according to the fault state and performing a fault exit operation on the power grid system according to the fault exit policy includes:
When the fault state is the direct current bus fault, executing a direct current bus fault exit strategy;
when the fault state is the active port fault, executing an active port fault exit strategy;
and when the fault state is the passive port fault, executing a passive port fault exit strategy.
4. A control method of a power grid system according to claim 3, wherein the step of executing a dc bus fault exit strategy when the fault condition is the dc bus fault comprises:
when the fault state is that the direct current bus fails, all direct current breakers between the active port and the passive port are disconnected, and the active port is switched into a reactive control mode;
detecting the running state of the second flexible multi-state switch in real time;
when the second flexible multi-state switch is detected to be in a normal running state, the passive port is switched to a reactive power control mode;
when the second flexible multi-state switch is detected to be in an out-of-operation state, the alternating current breaker and the alternating current isolation disconnecting link between the passive port and the passive power grid are disconnected according to a first preset disconnection sequence, and the passive port is switched to a cold standby state.
5. A method of controlling a power grid system according to claim 3, wherein the step of executing an active port failure exit strategy when the failure condition is the active port failure comprises:
when the fault state is that the active port is faulty, all direct current breakers between the active port and the passive port are disconnected, and an alternating current breaker and an alternating current isolation disconnecting link between the active port and the active power grid are disconnected according to a first preset disconnection sequence, wherein the active port is switched to a cold standby state;
detecting the running state of the second flexible multi-state switch in real time;
when the second flexible multi-state switch is detected to be in a normal running state, the passive port is switched to a reactive power control mode;
when the second flexible multi-state switch is detected to be in an out-of-operation state, the alternating current breaker and the alternating current isolation disconnecting link between the passive port and the passive power grid are disconnected according to the first preset disconnection sequence, and the passive port is switched to a cold standby state.
6. A method of controlling a power grid system according to claim 3, wherein the step of executing a passive port failure exit strategy when the failure state is the passive port failure comprises:
And when the fault state is that the passive port is faulty, all direct current breakers between the active port and the passive port are disconnected, and the alternating current breakers and alternating current isolation disconnecting switches between the passive port and the passive power grid are disconnected according to a first preset disconnection sequence, the passive port is switched to a cold standby state, and the active port is switched to a reactive control mode.
7. The power grid system control method according to claim 1, wherein the step of starting connection of the active power grid to the passive power grid according to the detection result of the opening state of the ac circuit breaker between the passive port and the passive power grid comprises:
if the alternating current circuit breaker between the passive port and the passive power grid is in a switching-off state, switching on all alternating current isolation disconnecting switches between the active power grid and the passive power grid according to a first preset switching-on sequence;
when the first flexible multi-state switch is detected to meet a preset charging condition, switching on an alternating current breaker between the active port and the active power grid;
detecting the running state of the second flexible multi-state switch in real time;
when the second flexible multi-state switch is detected to be in an out-of-operation state, switching on an alternating current breaker between the passive port and the passive power grid;
When detecting that the second flexible multi-state switch is in a normal running state, detecting VF power data of the first flexible multi-state switch in real time;
and when the VF power data is in a preset threshold interval, switching on an alternating current breaker between the passive port and the passive power grid.
8. A power grid system control device, characterized in that the power grid system comprises an active power grid and a passive power grid, the active power grid is connected with the passive power grid through a plurality of flexible multi-state switches, the flexible multi-state switches comprise a plurality of ports, each port comprises an active port and a passive port, a plurality of ports are connected through a bus bar, each flexible multi-state switch comprises a first flexible multi-state switch and a second flexible multi-state switch, and the device comprises:
the response module is used for responding to the received regulation and control request and acquiring interaction information and target power data corresponding to the power grid system;
the fault state module is used for determining a fault state corresponding to the first flexible multi-state switch in the power grid system based on the interaction information and the target power data;
the fault exit module is used for matching a corresponding fault exit strategy according to the fault state and executing fault exit operation on the power grid system according to the fault exit strategy;
The input starting module is used for detecting whether the alternating current circuit breaker between the passive port and the passive power grid is in a switching-off state or not when the first flexible multi-state switch receives an input starting instruction;
and the power grid starting connection module is used for starting and connecting the active power grid with the passive power grid according to the detection result of the opening state of the alternating current circuit breaker between the passive port and the passive power grid.
9. An electronic device comprising a memory and a processor, the memory having stored therein a computer program which, when executed by the processor, causes the processor to perform the steps of the grid system control method as claimed in any one of claims 1-7.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed, implements the grid system control method according to any one of claims 1-7.
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