CN113985184A - Test method, device and system for direct current distribution network protection device and storage medium - Google Patents
Test method, device and system for direct current distribution network protection device and storage medium Download PDFInfo
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- CN113985184A CN113985184A CN202111290896.8A CN202111290896A CN113985184A CN 113985184 A CN113985184 A CN 113985184A CN 202111290896 A CN202111290896 A CN 202111290896A CN 113985184 A CN113985184 A CN 113985184A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention discloses a method, a device and a system for testing a direct current power distribution network protection device and a storage medium. Wherein, the method comprises the following steps: obtain the monitoring information of a plurality of direct current circuit breakers, wherein, above-mentioned monitoring information includes: switching-on state information, alarm state information and voltage and current detection information; detecting whether any one of the monitoring information meets a protection condition; and if any one of the monitoring information meets the protection condition, controlling the direct current protection device to send out an alarm signal and controlling the direct current breaker to jump to an opening state. The invention solves the technical problem of low fault test accuracy of the test system of the direct-current power distribution network protection device in the prior art.
Description
Technical Field
The invention relates to the technical field of system testing, in particular to a method, a device and a system for testing a direct current power distribution network protection device and a storage medium.
Background
At present, in order to adapt to the development trend of a direct-current power supply and a direct-current load and simultaneously consider the perfect development of the existing alternating-current power distribution network, a direct-current power distribution part can be additionally arranged on the basis of the existing alternating-current power distribution network to form an alternating-current and direct-current hybrid power distribution network. However, for a power distribution network system which includes distributed power access and is in a hybrid alternating current-direct current connection mode, due to the nonlinearity of a power supply (a converter station), the fault transient process of the power distribution network system is more complex, and therefore how to effectively test the hybrid alternating current-direct current power distribution network becomes a problem to be solved urgently.
The simulation system of the alternating current-direct current hybrid power distribution network in the prior art is mainly a hardware-in-loop simulation test or a relay protection tester test, and the fault current values output by the protection devices in the two test modes are simulation values and have a great difference with real faults in the direct current power distribution network, so that the protection function configured in the protection devices cannot be fully verified, and further the accurate test of the faults of the direct current power distribution network cannot be realized.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a method, a device and a system for testing a direct current power distribution network protection device and a storage medium, which are used for at least solving the technical problem of low fault testing accuracy of a direct current power distribution network protection device testing system in the prior art.
According to an aspect of the embodiments of the present invention, there is provided a test system for a dc distribution network protection device, where the dc distribution network protection device includes: direct current circuit breaker, the direct current protection device who is connected with this direct current circuit breaker includes: the acquisition unit is used for acquiring monitoring information of a plurality of direct current circuit breakers, wherein the monitoring information comprises: switching-on and switching-off state information, alarm state information and voltage and current detection information; a detection unit configured to detect whether any one of the plurality of pieces of monitoring information satisfies a protection condition; and the control unit is used for controlling the direct current protection device to send out an alarm signal and controlling the direct current breaker to jump to an opening state if any one of the monitoring information meets the protection condition.
Optionally, the number of the direct current circuit breakers and the number of the direct current protection devices are the same, wherein an opening node and a closing node of the direct current circuit breaker are respectively connected to the direct current protection device, and the direct current protection device is configured to control opening or closing of the direct current circuit breaker.
Optionally, the system further includes: the direct current voltage sensor is connected with the direct current circuit breaker and used for acquiring a positive electrode voltage to ground and a negative electrode voltage to ground of the direct current circuit breaker; the current sensor is connected with the direct current breaker and used for acquiring a positive current value and a negative current value; wherein, the direct current voltage sensors and the current sensors are arranged in the same number.
Optionally, the dc circuit breaker further includes: the first auxiliary contact is used for identifying the opening state or closing state of the direct current breaker; the second auxiliary contact is connected with a closing indicator lamp and used for displaying the opening or closing state of the direct current circuit breaker based on the closing indicator lamp; and the alarm contact is used for identifying the alarm state information.
Optionally, the connecting lines in the test system are connected by a quick coupler.
Optionally, the system further includes: an experiment unit connected with the direct current protection device through a direct current bus and used for providing fault simulation signals of the direct current bus, wherein the fault simulation signals at least comprise one of the following signals: the fault circuit comprises a grounding short-circuit fault, an interelectrode short-circuit fault, a disconnection fault, a simulation single-point fault, a development type multi-point fault and a short-circuit fault.
According to another aspect of the embodiments of the present invention, there is also provided a method for testing a protection device for a dc power distribution network, where the protection device for a dc power distribution network includes: direct current circuit breaker, the direct current protection device who is connected with this direct current circuit breaker includes: obtain the monitoring information of a plurality of direct current circuit breakers, wherein, above-mentioned monitoring information includes: switching-on and switching-off state information, alarm state information and voltage and current detection information; detecting whether any one of the monitoring information meets a protection condition; and if any one of the monitoring information meets the protection condition, controlling the direct current protection device to send out an alarm signal and controlling the direct current breaker to jump to an opening state.
Optionally, the voltage and current detection information includes: the positive electrode-to-ground voltage value, the negative electrode-to-ground voltage value, the positive electrode current value and the negative electrode current value of the direct current circuit breaker are obtained.
According to another aspect of the embodiments of the present invention, there is also provided a test apparatus for a dc distribution network protection apparatus, where the dc distribution network protection apparatus includes: direct current circuit breaker, the direct current protection device who is connected with this direct current circuit breaker includes: the acquisition device is used for acquiring the monitoring information of a plurality of direct current circuit breakers, wherein the monitoring information comprises: switching-on and switching-off state information, alarm state information and voltage and current detection information; a detection device for detecting whether any one of the plurality of pieces of monitoring information satisfies a protection condition; and the control device is used for controlling the direct current protection device to send out an alarm signal and controlling the direct current breaker to jump to an opening state if any one of the monitoring information meets the protection condition.
According to another aspect of the embodiments of the present invention, there is further provided a storage medium, wherein the non-volatile storage medium stores a plurality of instructions, and the instructions are adapted to be loaded by a processor and execute any one of the above methods for testing a dc distribution network protection device.
In an embodiment of the present invention, an obtaining unit is configured to obtain monitoring information of a plurality of dc breakers, where the monitoring information includes: switching-on and switching-off state information, alarm state information and voltage and current detection information; a detection unit configured to detect whether any one of the plurality of pieces of monitoring information satisfies a protection condition; and the control unit is used for controlling the direct current protection device to send an alarm signal and controlling the direct current breaker to jump to an opening state if any one of the monitoring information meets the protection condition, so that the purpose of accurately testing the direct current distribution network protection device is achieved, the technical effect of improving the testing efficiency of the direct current distribution network protection device is achieved, and the technical problems of low testing efficiency and poor fault verification effect caused by the fact that the fault current value output by the direct current distribution network protection device in the prior art is a simulated value are solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic diagram of a dc distribution network protection device test system according to the prior art;
fig. 2 is a schematic structural diagram of a test system of a dc distribution network protection device according to an embodiment of the present invention;
fig. 3a is a schematic structural diagram of a test system of an alternative dc distribution network protection device according to an embodiment of the present invention;
fig. 3b is a schematic structural diagram of a test system of another alternative dc distribution network protection device according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an alternative dc distribution network protection device test platform according to an embodiment of the present invention;
fig. 5a is a schematic diagram of an alternative dc distribution network protection device test platform according to an embodiment of the present invention;
fig. 5b is a schematic diagram of an alternative dc distribution network protection device test platform according to an embodiment of the present invention;
fig. 6a is a schematic structural design diagram of an alternative test platform for a dc distribution network protection device according to an embodiment of the present invention;
fig. 6b is a schematic structural design diagram of an alternative test platform for a dc distribution network protection device according to an embodiment of the present invention;
fig. 7 is a flowchart of a method for testing a dc distribution network protection device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a test device for a protection device of a dc distribution network according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
In accordance with an embodiment of the present invention, there is provided a method for testing a dc distribution network protection device, where the steps illustrated in the flowchart of the drawings may be implemented in a computer system, such as a set of computer executable instructions, and where a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than that illustrated or described herein.
In recent years, direct current loads such as uninterruptible power supplies, electric vehicles, direct current motors, various household appliances and the like are increasing, and when the direct current loads are connected to an alternating current power grid, an AC/DC conversion link is needed. Direct current output by a photovoltaic direct current power supply and the like is directly supplied to a direct current load, so that alternating current and direct current conversion links in a system can be reduced, energy loss and higher harmonics brought by current conversion equipment are reduced, and the energy utilization efficiency and the electric energy quality are improved.
In order to adapt to the development trend of a direct-current power supply and a direct-current load and simultaneously consider the perfect development of the existing alternating-current power distribution network, a direct-current power distribution part can be additionally arranged on the basis of the existing alternating-current power distribution network to form an alternating-current and direct-current hybrid power distribution network. Electric energy can flow in alternating current and direct current side two-way in the mixed distribution network of alternating current-direct current, and alternating current-direct current system each other supports, and the flexibility of power supply and the receptivity to new forms of energy power supply increase substantially, will become one of the important development direction of future distribution system. However, the protection technology is one of the technologies that need key breakthroughs in the development of the alternating current/direct current hybrid power distribution network as a first defense line for guaranteeing the safe and stable operation of the system.
For a power distribution network system which comprises distributed power supply access and is in series-parallel connection with alternating current and direct current, the fault transient process is more complicated due to the nonlinearity of a power supply (a converter station). In order to prevent the influence of the fault transient process of the system fault on the operation safety of the power distribution network, a relay protection system configured on the direct current power distribution network meets the following requirements:
1) for the main protection: the method can reliably and quickly locate and remove the fault through the judgment of the relay protection fault element judgment algorithm, and has the characteristics of rapidity, direct selectivity and reliability.
2) For backup protection: the original backup protection scheme taking overcurrent protection as a main body is optimized, fault location is carried out by adopting a selective algorithm (such as a power direction, a differential principle and the like), the selectivity and the speed of backup protection are improved, and the sensitivity and the reliability of protection are ensured.
3) The protection system can automatically adapt to the change of the system operation mode, adjust the protection strategy of the protection function under different operation modes of the system and prevent the protection from being refused to operate and being wrongly operated when the system operation mode is changed.
4) The protection system provides a complete and integrated protection scheme for the power grid, and all functions and devices have a coordination and coordination relationship of multi-layer protection information, so that the configuration, setting and management of the protection functions and devices can be simplified.
In order to verify whether the direct-current power distribution network protection device meets the requirements of selectivity, quick action, sensitivity and reliability, the protection function of the protection device can be verified in a hardware-in-loop simulation test mode, a relay protection tester test mode and a dynamic simulation test mode.
A test system of a direct-current power distribution network protection device in the prior art is mainly a test system of the direct-current power distribution network protection device based on hardware-in-loop simulation, and as shown in fig. 1, the test system of the direct-current power distribution network protection device comprises a real-time simulation device, a simulation interface board card, a data processing device, a direct-current control protection device, a field layer simulation device and a converter valve control system; a first data end of the real-time simulation device is connected with a first input end of the direct-current control protection device through the simulation interface board card and the data processing device in sequence, and a second input/output end of the field layer simulation device is connected with a second input/output end of the direct-current control protection device; and the first output end of the direct current control protection device is connected with the second data end of the simulation interface board card through the converter valve control system in sequence. And simulating the fault of the direct current system by the simulation real-time device to test the direct current control protection device.
Therefore, the existing direct current distribution network protection device test generally adopts a hardware-in-loop simulation test or a relay protection tester test. The two test modes are that the fault current output by the protection device is a simulated value, and has a larger difference with the real fault in the direct-current power distribution network, so that the protection function configured in the protection device cannot be fully verified. The simulation system cannot present the action characteristic of the circuit breaker and the time characteristic of protective tripping, and cannot accurately test the system-level direct-current protection function of passing time coordination.
Based on the above problems, an embodiment of the present invention provides an embodiment of a test system for a dc power distribution network protection device, where the dc power distribution network protection device includes: fig. 2 is a schematic structural diagram of a test system of a dc distribution network protection device according to an embodiment of the present invention, and as shown in fig. 2, the test system of the dc distribution network protection device includes: an acquisition unit 100, a detection unit 102, a control unit 104, wherein:
the acquiring unit 100 is configured to acquire monitoring information of a plurality of dc breakers;
the detecting unit 102 is configured to detect whether any one of the plurality of pieces of monitoring information satisfies a protection condition;
the control unit 104 is configured to control the dc protection device to send an alarm signal and control the dc circuit breaker to trip to an open state if any one of the monitoring information satisfies a protection condition.
In an embodiment of the present invention, an obtaining unit is configured to obtain monitoring information of a plurality of dc breakers, where the monitoring information includes: switching-on and switching-off state information, alarm state information and voltage and current detection information; a detection unit configured to detect whether any one of the plurality of pieces of monitoring information satisfies a protection condition; and the control unit is used for controlling the direct current protection device to send an alarm signal and controlling the direct current breaker to jump to an opening state if any one of the monitoring information meets the protection condition, so that the purpose of accurately testing the direct current distribution network protection device is achieved, the technical effect of improving the testing efficiency of the direct current distribution network protection device is achieved, and the technical problems of low testing efficiency and poor fault verification effect caused by the fact that the fault current value output by the direct current distribution network protection device in the prior art is a simulated value are solved.
Optionally, the monitoring information includes: switching-on and switching-off state information, alarm state information and voltage and current detection information; the protection condition is that the voltage and current detection value of any one direct current breaker or the calculated amount of the voltage and current of the direct current breaker exceeds the protection threshold range; the voltage current detection information includes: the positive electrode-to-ground voltage value, the negative electrode-to-ground voltage value, the positive electrode current value and the negative electrode current value of the direct current circuit breaker are obtained.
Optionally, the connection lines in the test system are connected by quick connectors.
Optionally, the number of the direct current circuit breakers and the number of the direct current protection devices are the same, wherein an opening node and a closing node of the direct current circuit breaker are respectively connected to the direct current protection device, and the direct current protection device is configured to control opening or closing of the direct current circuit breaker.
Optionally, the direct current distribution network protection device may adopt, but is not limited to, a direct current signal input of 4-20mA or 0-10V.
In an optional embodiment, the system further includes:
the direct current voltage sensor is connected with the direct current circuit breaker and used for acquiring a positive electrode voltage to ground and a negative electrode voltage to ground of the direct current circuit breaker;
the current sensor is connected with the direct current breaker and used for acquiring a positive current value and a negative current value;
optionally, the number of the direct current voltage sensors and the number of the current sensors are the same.
It should be noted that, the test system of the dc distribution network protection device in the embodiment of the present invention is configured with a plurality of dc circuit breakers, dc voltage sensors, and current sensors, the dc distribution network protection device may access the secondary quantity measured by the dc voltage current sensors, and when a fault occurs, an alarm may be given or a corresponding dc circuit breaker may be tripped, that is, when the branch voltage and current reach the protection threshold, the dc distribution network protection device gives an alarm and trips the branch circuit breaker.
In an optional embodiment, the dc circuit breaker further includes:
the first auxiliary contact is used for identifying the opening state or closing state of the direct current breaker;
the second auxiliary contact is connected with a closing indicator lamp and used for displaying the opening or closing state of the direct current circuit breaker based on the closing indicator lamp;
and the alarm contact is used for identifying the alarm state information.
Optionally, the contacts are configured based on the number of the dc breakers, for example, 6 dc breakers configure 2 sets of auxiliary contacts, 1 set of alarm contacts, 1 set of auxiliary contacts, and 1 set of alarm contacts, and are connected to the dc distribution network protection device to be tested, and identify the opening/closing state and whether the alarm state of 6 dc breakers through the opening signal, and the closing indicator lamp is connected to the other 1 set of auxiliary contacts, as shown in fig. 3a and fig. 3b, and is used for locally identifying the opening/closing state of 6 dc breakers.
In the embodiment of the invention, based on the mode of configuring the live indicator lamp and the closing indicator lamp for the test system of the direct-current power distribution network protection device, the first auxiliary contact is arranged for the direct-current circuit breaker and is used for marking the opening state or the closing state of the direct-current circuit breaker; the second auxiliary contact is connected with a closing indicator lamp and used for displaying the opening or closing state of the direct current circuit breaker based on the closing indicator lamp; and the alarm contact is used for identifying the alarm state information and achieving the purpose of visually displaying the working state of the platform and the on-off state of each circuit breaker. The technical effect of conveniently judging whether the direct-current distribution network protection device acts correctly is achieved.
In an optional embodiment, the system further includes: and the experiment unit is connected with the direct current protection device through a direct current bus and is used for providing a fault simulation signal of the direct current bus.
Optionally, the fault analog signal at least includes one of: the fault circuit comprises a grounding short-circuit fault, an interelectrode short-circuit fault, a disconnection fault, a simulation single-point fault, a development type multi-point fault and a short-circuit fault.
In an optional embodiment, a test platform for a protection device of a direct-current power distribution network is provided, and includes a direct-current power distribution network experiment platform and a protection device test platform, which are used for testing distributed or centralized direct-current protection devices, fig. 4 is a schematic diagram of the test platform for the protection device of the direct-current power distribution network according to the embodiment of the present invention, as shown in fig. 4, the direct-current power distribution network experiment platform forms an alternating-current/direct-current single-connection wiring mode through two alternating-current/direct-current converters, a direct-current system includes two bus bars, and the bus bars are connected through a bus-bar switch. The test system for the direct-current distribution network protection device is configured with an alternating-current/direct-current fault simulation device, the alternating-current/direct-current fault simulation device can be connected to an alternating-current line, a direct-current bus, an outgoing line and a busbar switch (namely, at positions corresponding to f1-f6 in fig. 4), and the simulatable fault types can include, but are not limited to, a direct-current single-pole ground fault, an inter-pole short-circuit fault, an alternating-current inter-phase short-circuit fault, a single-phase and three-phase ground fault, and the like.
Fig. 5a and 5b are schematic diagrams of alternative dc distribution network protection device testing platforms according to embodiments of the present invention, and as shown in fig. 5a and 5b, the protection device testing platforms are configured with dc circuit breakers, dc voltage sensors, and current sensors. The measured direct current protection device can be connected with a direct current voltage sensor and a secondary quantity measured by a current sensor, and can give an alarm or trip off a corresponding direct current breaker when a fault occurs. The method specifically comprises the following steps: 6 direct current breakers QF1, QF2, QF3, QF4, QF5 and QF6 in the protection test platform are connected in series in a direct current distribution network experiment platform and can be connected in series at the positions of switch inlets or outlets, namely QF21, QF22, QF25, QF27, QF26 and QF29 in the position corresponding to QF21, QF22, QF25, QF27 and QF26 in the position corresponding to QF29 in the position shown in FIG. 4; the rated voltage of the 6 direct current breakers is 1000V, and the 6 direct current breakers are configured to be electrically operated, and the operating voltage is AC 220V. The 6 direct-current circuit breaker opening and closing nodes are respectively connected to a direct-current protection device to be tested, and the direct-current protection device to be tested can remotely operate the 6 direct-current circuit breakers to open and close the switches through a background opening instruction; the 6 direct current circuit breakers are provided with 2 groups of auxiliary contacts and 1 group of alarm contacts, the 1 group of auxiliary contacts and the 1 group of alarm contacts are connected with a direct current protection device to be tested, the opening and closing states and whether alarm states of the 6 direct current circuit breakers are identified through opening signals, the other 1 group of auxiliary contacts are connected with indicator lamps, and the opening and closing states of the 6 direct current circuit breakers are locally identified; the lower ends of the 6 direct current breakers are provided with 6 groups of 24 voltage and current sensors, the voltage to earth of the positive electrode and the voltage to earth of the negative electrode are respectively measured, the current of the positive electrode and the current of the negative electrode, and the secondary sides of the voltage and current sensors are connected to a direct current protection device to be measured.
As an optional embodiment, fig. 6a and 6b are schematic structural design diagrams of an optional test platform for a dc distribution network protection device according to an embodiment of the present invention, and as shown in fig. 6a and 6b, considering test safety and operation convenience, the test platform adopts a cabinet structure, and 4 wheels capable of rotating 360 degrees are installed below the cabinet to configure a service brake; the wiring of the test platform adopts a quick connector, is matched with the quick wiring and is used for realizing flexible insertion of the direct current protection device; two adjacent rows of quick connectors are staggered, so that the wiring of operators is facilitated; the testing platform is provided with the live indicator lamp and the closing indicator lamp at the position of the cabinet door, so that the running state of the device and whether the protection device acts correctly can be observed conveniently; the height of the test platform is not more than 1.3 m, and an antistatic table pad is arranged on the top plate, so that a tested device can be conveniently placed on the top of the cabinet; each curb plate and roof of above-mentioned test platform can be dismantled, conveniently changes voltage, current sensor.
Through the above description of the embodiments, those skilled in the art can clearly understand that the system according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
Example 2
According to an embodiment of the present invention, there is also provided a method for testing a protection device for a dc power distribution network, and fig. 7 is a flowchart of a method for testing a protection device for a dc power distribution network according to an embodiment of the present invention, as shown in fig. 7, the protection device for a dc power distribution network includes: the direct current circuit breaker and the direct current protection device connected with the direct current circuit breaker, wherein the method comprises the following steps:
step S202, acquiring monitoring information of a plurality of direct current circuit breakers;
step S204, detecting whether any one of the monitoring information meets the protection condition;
step S206, if any of the monitoring information satisfies the protection condition, controlling the dc protection device to send an alarm signal, and controlling the dc breaker to trip into the open state.
In an embodiment of the present invention, an obtaining unit is configured to obtain monitoring information of a plurality of dc breakers, where the monitoring information includes: switching-on and switching-off state information, alarm state information and voltage and current detection information; a detection unit configured to detect whether any one of the plurality of pieces of monitoring information satisfies a protection condition; and the control unit is used for controlling the direct current protection device to send an alarm signal and controlling the direct current breaker to jump to an opening state if any one of the monitoring information meets the protection condition, so that the purpose of accurately testing the direct current distribution network protection device is achieved, the technical effect of improving the testing efficiency of the direct current distribution network protection device is achieved, and the technical problems of low testing efficiency and poor fault verification effect caused by the fact that the fault current value output by the direct current distribution network protection device in the prior art is a simulated value are solved.
Optionally, the monitoring information includes: switching-on and switching-off state information, alarm state information and voltage and current detection information; the protection condition is that the voltage and current detection value of any one direct current breaker or the calculated amount of the voltage and current of the direct current breaker exceeds the protection threshold range; the voltage current detection information includes: the positive electrode-to-ground voltage value, the negative electrode-to-ground voltage value, the positive electrode current value and the negative electrode current value of the direct current circuit breaker are obtained.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
In addition, it should be noted that, for alternative or preferred embodiments of the present embodiment, reference may be made to the relevant description in embodiment 1, and details are not described herein again.
Example 3
According to an embodiment of the present invention, there is also provided an apparatus embodiment for implementing the test method for the dc distribution network protection apparatus, where the dc distribution network protection apparatus includes: fig. 8 is a schematic structural diagram of a test device for a protection device of a dc distribution network according to an embodiment of the present invention, and as shown in fig. 8, the test device for a protection device of a dc distribution network includes: an obtaining module 300, a detecting module 302, and a control module 304, wherein:
the acquiring module 300 is configured to acquire monitoring information of a plurality of dc breakers, where the monitoring information includes: switching-on and switching-off state information, alarm state information and voltage and current detection information;
the detecting module 302 is configured to detect whether any one of the plurality of pieces of monitoring information satisfies a protection condition;
the control module 304 is configured to control the dc protection device to send an alarm signal and control the dc circuit breaker to trip into an open state if any of the monitoring information meets a protection condition.
It should be noted that the above modules may be implemented by software or hardware, for example, for the latter, the following may be implemented: the modules can be located in the same processor; alternatively, the modules may be located in different processors in any combination.
It should be noted that the acquiring module 300, the detecting module 302, and the controlling module 304 correspond to steps S102 to S106 in embodiment 1, and the modules are the same as the corresponding steps in the implementation example and the application scenario, but are not limited to the disclosure in embodiment 1. It should be noted that the modules described above may be implemented in a computer terminal as part of an apparatus.
It should be noted that, reference may be made to the relevant description in embodiment 1 for alternative or preferred embodiments of this embodiment, and details are not described here again.
The test device for the direct current distribution network protection device may further include a processor and a memory, where the obtaining module 300, the detecting module 302, the control module 304, and the like are all stored in the memory as program units, and the processor executes the program units stored in the memory to implement corresponding functions.
The processor comprises a kernel, and the kernel calls a corresponding program unit from the memory, wherein one or more than one kernel can be arranged. The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
According to an embodiment of the present application, there is also provided an embodiment of a non-volatile storage medium. Optionally, in this embodiment, the nonvolatile storage medium includes a stored program, and when the program runs, the apparatus where the nonvolatile storage medium is located is controlled to execute the test method of any one of the dc distribution network protection devices.
Optionally, in this embodiment, the nonvolatile storage medium may be located in any one of a group of computer terminals in a computer network, or in any one of a group of mobile terminals, and the nonvolatile storage medium includes a stored program.
Optionally, the apparatus in which the non-volatile storage medium is controlled to perform the following functions when the program is executed: and (6) obtaining. Monitoring information of a plurality of direct current circuit breakers; detecting whether any one of the monitoring information meets a protection condition; and if any one of the monitoring information meets the protection condition, controlling the direct current protection device to send out an alarm signal and controlling the direct current breaker to jump to an opening state.
According to an embodiment of the present application, there is also provided an embodiment of a processor. Optionally, in this embodiment, the processor is configured to execute a program, where the program executes the test method of any one of the dc distribution network protection devices when running.
According to an embodiment of the present application, there is further provided an embodiment of a computer program product, which is adapted to execute a program for initializing the steps of the dc distribution network protection device testing method according to any one of the above.
Optionally, the computer program product described above, when being executed on a data processing device, is adapted to perform a procedure for initializing the following method steps: acquiring monitoring information of a plurality of direct current circuit breakers; detecting whether any one of the monitoring information meets a protection condition; and if any one of the monitoring information meets the protection condition, controlling the direct current protection device to send out an alarm signal and controlling the direct current breaker to jump to an opening state.
According to an embodiment of the present application, there is further provided an embodiment of an electronic device, including a memory and a processor, where the memory stores a computer program, and the processor is configured to run the computer program to execute any one of the above methods for testing a dc distribution network protection device.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable non-volatile storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a non-volatile storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned nonvolatile storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A test system of a direct current distribution network protection device is characterized in that the direct current distribution network protection device comprises: direct current circuit breaker, the direct current protection device who is connected with this direct current circuit breaker includes:
the acquisition unit is used for acquiring monitoring information of a plurality of direct current circuit breakers, wherein the monitoring information comprises: switching-on and switching-off state information, alarm state information and voltage and current detection information;
the detection unit is used for detecting whether any one of the monitoring information meets a protection condition;
and the control unit is used for controlling the direct current protection device to send out an alarm signal and controlling the direct current breaker to jump to an opening state if any one of the monitoring information meets the protection condition.
2. The system according to claim 1, wherein the number of the dc circuit breakers and the dc protection devices is the same, wherein the switching-off nodes and the switching-on nodes of the dc circuit breakers are respectively connected to the dc protection devices, and the dc protection devices are used for controlling the switching-off or the switching-on of the dc circuit breakers.
3. The system of claim 2, further comprising:
the direct-current voltage sensor is connected with the direct-current circuit breaker and used for acquiring a positive electrode voltage to ground and a negative electrode voltage to ground of the direct-current circuit breaker;
the current sensor is connected with the direct current breaker and used for acquiring a positive current value and a negative current value;
the direct-current voltage sensors and the current sensors are arranged in the same number.
4. The system of claim 3, wherein the DC circuit breaker further comprises:
the first auxiliary contact is used for identifying the opening state or the closing state of the direct current breaker;
the second auxiliary contact is connected with a closing indicator lamp and used for displaying the opening or closing state of the direct current circuit breaker based on the closing indicator lamp;
and the alarm contact is used for identifying the alarm state information.
5. The system of claim 2, wherein the connection lines in the test system are connected using quick-fit joints.
6. The system of claim 2, further comprising: the experiment unit is connected with the direct current protection device through a direct current bus and used for providing a fault simulation signal of the direct current bus, wherein the fault simulation signal at least comprises one of the following signals: the fault circuit comprises a grounding short-circuit fault, an interelectrode short-circuit fault, a disconnection fault, a simulation single-point fault, a development type multi-point fault and a short-circuit fault.
7. A test method for a direct current distribution network protection device is characterized in that the direct current distribution network protection device comprises the following steps: direct current circuit breaker, the direct current protection device who is connected with this direct current circuit breaker includes:
acquiring monitoring information of a plurality of direct current circuit breakers, wherein the monitoring information comprises: switching-on and switching-off state information, alarm state information and voltage and current detection information;
detecting whether any one of the monitoring information meets a protection condition;
and if any one of the monitoring information meets the protection condition, controlling the direct current protection device to send out an alarm signal and controlling the direct current breaker to jump to an opening state.
8. The method of claim 7, wherein the voltage current detection information comprises: the direct current circuit breaker comprises a positive electrode voltage-to-ground voltage value, a negative electrode voltage-to-ground voltage value, a positive electrode current value and a negative electrode current value.
9. The utility model provides a testing arrangement of direct current distribution network protection device which characterized in that, including in the direct current distribution network protection device: direct current circuit breaker, the direct current protection device who is connected with this direct current circuit breaker includes:
the acquisition module is used for acquiring monitoring information of a plurality of direct current circuit breakers, wherein the monitoring information comprises: switching-on and switching-off state information, alarm state information and voltage and current detection information;
the detection module is used for detecting whether any one of the monitoring information meets the protection condition;
and the control module is used for controlling the direct current protection device to send out an alarm signal and controlling the direct current breaker to jump to an opening state if any one of the monitoring information meets the protection condition.
10. A storage medium, characterized in that the non-volatile storage medium stores a plurality of instructions adapted to be loaded by a processor and to execute the method for testing a dc distribution network protection device according to any one of claims 7 to 8.
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Cited By (1)
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