CA2866400A1 - Dc power dynamic analog simulation system and dc power test system - Google Patents
Dc power dynamic analog simulation system and dc power test system Download PDFInfo
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- CA2866400A1 CA2866400A1 CA2866400A CA2866400A CA2866400A1 CA 2866400 A1 CA2866400 A1 CA 2866400A1 CA 2866400 A CA2866400 A CA 2866400A CA 2866400 A CA2866400 A CA 2866400A CA 2866400 A1 CA2866400 A1 CA 2866400A1
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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
- G01R31/40—Testing power supplies
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
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- General Physics & Mathematics (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Emergency Protection Circuit Devices (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
Disclosed are a DC power supply dynamic simulation system and a DC power supply test system. The DC power supply dynamic simulation system comprises a storage battery, a charging cabinet, a control cabinet, a test cabinet, a resistor cabinet, a feeder cabinet, an emergency lighting cabinet, a communication power supply cabinet, and an AC power distribution cabinet. The communication power supply cabinet and the emergency lighting cabinet are electrically connected to the AC power distribution cabinet. The charging cabinet converts the alternating current of the AC power distribution cabinet into a direct current, and stores the direct current into the storage battery. The storage battery and the charging cabinet provide a DC power supply to the test cabinet and the feeder cabinet through a selector switch. A sliding resistor in the resistor cabinet adjusts the current magnitude in a test cabinet circuit. The control cabinet controls the test cabinet through a control switch. The feeder cabinet is electrically connected to the storage battery. The present invention recommends a reasonable solution with selective protection to the configuration of a DC system protecting element, to achieve the purposes of security, practicability and accuracy in electric power applications.
Description
DC Power Supply Dynamic Simulation System And DC Power Supply Test System Technical Field The present invention relates to a DC power dynamic analog simulation system and a DC power test system.
Background The DC power system plays an important equipment in ensuring the safe and stable operation of the electric power network. The DC system provides closing power to a circuit breaker and provides DC power to a protective relay and automatic device, a communication device and the like when the electric power network run normally, and provides safe and reliable DC power to a protective relay and automatic device, a control device of a circuit breaker and emergency lighting when the electric power network fails, especially when AC power breaks down. The DC system is the fundamental guarantee for the correct operation of the protective relay and automatic device and a circuit breaker of a power system.
However, if a DC loop protection device is selected improperly or is irrational in stage difference cooperation, or if a protection device operates in an exceeding way or cannot clear a short-circuit fault correctly in the event of a fault, an accident may happen or expand in the electric power network. Many branch circuits in a DC network sometimes need a circuit breaker or a fuser for protection and are usually connected in series in three to four levels because of the great power supply and the wide loop distribution of the DC system in a power plant and a power substation, thereby, such problems as how to select the type of a protection electrical appliance correctly and the cooperation of selective protection between the upper and the lower ones would arise.
The so-called selective protection refers to the cooperation of current and time characteristics between two or more circuit breaker or fuser in a power distribution system. When an over current fault occurs in a given range, a circuit breaker or a fuser within this range is assigned to actuate, while other circuit breakers or fusers do not actuate, therefore, the load affected by the fault is minimized in number.
Because different power supply departments have different requirements on the capacity selection of storage battery of a substation, the power supply mode of a DC screen and a measurement and control protection screen, the connection mode of a DC circuit, and the importance of load and others, they are positional distributed differently, consequently, leads and conductors of different sectional areas and lengths will be selected, all of these differences in factors, which will change the resistance of a DC loop, correspondently, the short circuit current will change, and each substation has different short-circuit current.
To meet the selective requirement of stage difference cooperation, the following three methods are mainly adopted:
(1) The circuit breaker of a feeder screen (or a distribution screen) in a DC
system and that of a measurement and control protection screen are powered one by one. This way has the following problems: since two wires are arranged between each pair of circuit breakers and the distance between the feeder screen (or distribution screen) and the measurement and control screen is tens or hundreds of meters, such many and long wires are tied together and will become complex and disordered after running for many years. For example, the wires are loose connected with the circuit breaker; the wires are weakened in insulation or broken by accident; and the tied wires may hidden hazards such as multiple mutually short-circuited and cause fire in case of arc discharge and other hidden hazards, which will further cause a serious potential accident of whole power loss of a measurement and control protection screen.
Background The DC power system plays an important equipment in ensuring the safe and stable operation of the electric power network. The DC system provides closing power to a circuit breaker and provides DC power to a protective relay and automatic device, a communication device and the like when the electric power network run normally, and provides safe and reliable DC power to a protective relay and automatic device, a control device of a circuit breaker and emergency lighting when the electric power network fails, especially when AC power breaks down. The DC system is the fundamental guarantee for the correct operation of the protective relay and automatic device and a circuit breaker of a power system.
However, if a DC loop protection device is selected improperly or is irrational in stage difference cooperation, or if a protection device operates in an exceeding way or cannot clear a short-circuit fault correctly in the event of a fault, an accident may happen or expand in the electric power network. Many branch circuits in a DC network sometimes need a circuit breaker or a fuser for protection and are usually connected in series in three to four levels because of the great power supply and the wide loop distribution of the DC system in a power plant and a power substation, thereby, such problems as how to select the type of a protection electrical appliance correctly and the cooperation of selective protection between the upper and the lower ones would arise.
The so-called selective protection refers to the cooperation of current and time characteristics between two or more circuit breaker or fuser in a power distribution system. When an over current fault occurs in a given range, a circuit breaker or a fuser within this range is assigned to actuate, while other circuit breakers or fusers do not actuate, therefore, the load affected by the fault is minimized in number.
Because different power supply departments have different requirements on the capacity selection of storage battery of a substation, the power supply mode of a DC screen and a measurement and control protection screen, the connection mode of a DC circuit, and the importance of load and others, they are positional distributed differently, consequently, leads and conductors of different sectional areas and lengths will be selected, all of these differences in factors, which will change the resistance of a DC loop, correspondently, the short circuit current will change, and each substation has different short-circuit current.
To meet the selective requirement of stage difference cooperation, the following three methods are mainly adopted:
(1) The circuit breaker of a feeder screen (or a distribution screen) in a DC
system and that of a measurement and control protection screen are powered one by one. This way has the following problems: since two wires are arranged between each pair of circuit breakers and the distance between the feeder screen (or distribution screen) and the measurement and control screen is tens or hundreds of meters, such many and long wires are tied together and will become complex and disordered after running for many years. For example, the wires are loose connected with the circuit breaker; the wires are weakened in insulation or broken by accident; and the tied wires may hidden hazards such as multiple mutually short-circuited and cause fire in case of arc discharge and other hidden hazards, which will further cause a serious potential accident of whole power loss of a measurement and control protection screen.
(2) Another way is to blindly increase the rated current of the upper circuit breaker and increase the difference between the snap action setting values of the upper and lower circuit breakers to ensure the selective requirement, by which not only the sensitivity of the main circuit breaker will become insufficient and the circuit breaker will reject but also the large-capacity switch is high in cost and poor in economy.
(3) To increase the selective requirement of the stage difference cooperation, another way is that the measurement and control protection screen selects a small DC circuit breaker with B-type tripping characteristics in order to selectively protect the small DC circuit breaker with C-type tripping characteristics of the upper main electrical screen or the branch electrical screen. This way may cause maloperation.
For the above reasons, the protection selection of the DC system is significant for the normal operation of the DC system. Whereas, there is no way for testing the DC power system in the prior art, so the construction for the DC power system will not be tested for verification. And there is still no effective solution for the absence of test environment of the DC power system in the prior art.
Summary To solve the problem, the present invention discloses a DC power dynamic analog simulation system so as to provide a test platform for the stage difference cooperation between breakers of different sizes and a breaker and a fuser, and make them safe, practical and accurate in the electrical application.
To achieve this objective, the technical scheme of the present invention is as follows:
A DC power dynamic analog simulation system includes at least one storage battery, a charging cabinet, a control cabinet, a test cabinet, a resistor cabinet, a feeder cabinet, an emergency lighting cabinet, a communication power cabinet, and an AC power distribution cabinet. The communication power cabinet and the emergency lighting cabinet are electrically connected to the AC power distribution cabinet. The charging cabinet converts the alternating current of the AC power distribution cabinet into direct current, and stores the direct current into the at least one storage battery. The at least one storage battery and the charging cabinet provide DC power to the test cabinet and the feeder cabinet through a selector switch. A sliding resistor in the resistor cabinet adjusts the current magnitude in a test cabinet circuit. The control cabinet controls the test cabinet through a control switch. The feeder cabinet is electrically connected to the at least one storage battery According to a preferred embodiment of the present invention, there are two sets of storage batteries.
According to a preferred embodiment of the present invention, the test cabinet is a platform for testing the stage difference cooperation between a circuit breaker and a fuser.
According to a preferred embodiment of the present invention, the system is connected with a computer for controlling the whole system.
According to a preferred embodiment of the present invention, the circuits for the resistor cabinet and the test cabinet are connected with a multi-channel wave recorder, which is configured to acquire the current waveforms of an adjustable resistor loop and a test loop respectively and record the current change trend in the process of testing the stage difference cooperation in real time, thereby providing the basis for analyzing the stage difference cooperation of protection component of the DC power system.
According to another aspect of the present invention, a DC power test system is also provided. The DC power test system includes: a test cabinet, in which a circuit breaker to be tested and a fuser to be tested are deployed, wherein the test cabinet comprises a plurality of control switches for controlling connection ways of the circuit breaker to be tested and the fuser to be tested;a resistor cabinet, in which at least one resistor is deployed, wherein the at least one resistor is connected in a DC circuit where the circuit breaker to be tested and the fuser to be tested are located; and a control cabinet, which is connected with the test cabinet and is configured to send a control signal to the plurality of control switches.
Furthermore, the DC power system further includes: at least one storage battery, which is connected with the test cabinet and the resistor cabinet respectively and is configured to provide DC power to the test cabinet and the resistor cabinet; and a charging cabinet, which is connected with the at least one storage battery and is configured to charge the at least one storage battery Furthermore, the DC power test system further includes: a multi-channel wave recorder, each channel of which is configured to acquire and save a current waveform of the DC circuit.
Furthermore, the DC power test system further includes: an analysis and verification module, which is connected with the test cabinet and is configured to acquire the action data of the circuit breaker to be tested and the fuser to be tested and analyze the protection sensitivity of the circuit breaker to be tested and the fuser to be tested according to the action data.
Furthermore, the analysis and verification module is further configured to acquire the device parameter of the DC power test system and analyze, according to the device parameter, whether the device in the DC power test system meets requirements of the electrical design regulations.
Furthermore, the device parameter includes a parameter of a wire. The analysis and verification module is further configured to analyze whether a section size of the wire meets requirements of the electrical design regulations.
Furthermore, the analysis and verification module is further configured to analyze selectivity of an upper protective component and a lower protective component in the DC power test system according to the action data.
Furthermore, the DC power test system further includes: a result output module, which is connected with the analysis and verification module and is configured to output the analysis result of an analysis and verification module.
According to the technical scheme of the present invention, the breaking characteristics of common DC circuit breakers and fusers of different sizes from different manufacturers are tested and the stage difference cooperation between the circuit breakers and the fusers is also tested by simulating the actual operation environment of a power distribution DC system; a stage difference cooperation test =
station is constructed for the DC system to master the stage difference cooperation characteristics of various combined domestic and imported circuit breakers and fusers of different sizes from different manufacturers in the DC power system of electrical engineering and discuss the condition of implementing the selectivity action of each protection component of the DC system by testing the stage difference cooperation of the DC circuit breaker and the fuser under a DC
short-circuit condition a lot, thereby recommending a rational selectivity protection scheme for the configuration of protection components of the DC system.
Therefore, the objectives of safety, practicality and accuracy in the electrical application are achieved.
Other characteristics and advantages of the system will be described in the following specification, and partially become clear in the specification or known by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained through the structures specified in the specification, claims and drawing.
The technical scheme of the present invention will be further described below through the drawing and embodiments in detail.
Brief description of the drawings The drawing is used for the further understanding of the present invention and constitutes one part of the specification to explain the present invention with embodiments of the present invention rather than limiting the present invention.
In the drawing, Fig. 1 is a diagram showing the electrical structure of a DC power dynamic analog simulation system in one embodiment of the present invention, wherein: 1-circuit breaker; 2-fuser.
Detailed description of the embodiments The preferred embodiments of the present invention will be described below in conjunction with the drawing, and it should be understood that the preferred embodiments described here are only used for describing and explaining the present invention instead of limiting the present invention.
As shown in Fig. 1, the DC power dynamic analog simulation system in this embodiment includes a storage battery, a charging cabinet, a control cabinet, a test cabinet, a resistor cabinet, a feeder cabinet, an emergency lighting cabinet, a communication power cabinet, and an AC power distribution cabinet. The communication power cabinet and the emergency lighting cabinet are electrically connected to the AC power distribution cabinet. The charging cabinet converts the alternating current of the AC power distribution cabinet into direct current, and stores the direct current into the storage battery. The storage battery and the charging cabinet provide DC power to the test cabinet and the feeder cabinet through a selector switch. A sliding resistor in the resistor cabinet adjusts the current magnitude in a test cabinet circuit. The control cabinet controls the test cabinet through a control switch. The feeder cabinet is electrically connected to the at least one storage battery There are two sets of storage batteries for standby. The test cabinet is a platform for testing the stage difference cooperation between a circuit breaker and a fuser. The system is connected with a computer for controlling the whole system.
The circuits for the resistor cabinet and the test cabinet are connected with a multi-channel recorder, which is configured to acquire the current waveforms of an adjustable resistor loop and a test loop respectively and record the current change trend in the process of testing the stage difference cooperation in real time, so as to provide the basis for analyzing the stage difference cooperation of protection component of the DC power system.
The DC power supply feeder system adopts a radiated power supply network.
Namely, the DC load of each level of the DC system is usually provided with two DC power supplies, and usually, one of them runs and the other one is for hot standby. If the one running is abnormal, such as short circuit tripping, the standby one can run automatically.
The system records the event name, action time, event contents and other related contents in the Sequence Of Event (SOE) in detail, so as to analyze and judge the fault. The system has a strong communication function so that it can realize communication of various regulations and different communication media and also the communication of other systems.
DC grounded detection: the grounded branch circuit, grounded resistance, polarity and the like of the bus bar and each branch circuit of the DC power system are detected or displayed in real time, and the condition of the faulted branch circuit is also detected in real time.
Since the feeder short-circuit protection device can correctly distinguish the impulse closing current of closing loop of an AC high-voltage circuit breaker and the short-circuit current of a DC system, it can quickly identify and selectively remove the short-circuit fault of the DC power system and can further adjust the running way of the system in time and automatically enable the DC standby power supply.
The circuit breaker can implement local and remote operation. The control device of the circuit breaker can correctly reflect the short-circuit fault of the DC
system, and can further remove the faulted branch circuit quickly and enable a corresponding standby branch circuit, thereby improving the operation reliability of the system.
The operation way of the DC power feeder can achieve real-time monitoring by a computer, namely, the operation way of the DC feeder can be controlled remotely or locally, so that the standby power branch circuit of the DC feeder can be enabled or removed automatically, and the state parameters of the bus bar and each branch circuit of the DC system are monitored.
The system is provided with an automatic control and protection device for the DC system, which can monitor the load current, grounded current and grounded resistance of each loop and control each loop breaker. The system can further monitor the operation state and operation parameter of the whole DC system in an on-line way, so as to realize a "four remote functions".
The circuit breakers for the closing power branch circuit and the control power branch circuit of the DC system adopt an ABB or an imported product of the same level and are provided with an electrical operation mechanism, with capacity configured according to the loop parameter. The circuit breaker for the operation feeder branch circuit adopts a DC circuit breaker with an automatic delaying and segmenting function, which is manufactured from the Beijing People's electrical appliance factory.
The DC system should have an emergency illumination automatic switching function.
The system further has a grounded detection function: completing the insulated automatic real-time detection of the DC system. The detection process does not cause the fluctuation of grounded voltage of the DC bus bar. It has the function of uni-pole and multi-pole grounded wire selection and can detect the wire crossing of the feeder branch circuits automatically. It can further judge grounded faults at multiple points, displays them in a picture in time and gives an alarm, and shows the grounded branch circuit and its polarity. The bus bar voltage, branch circuit current and other state parameters of the DC system are detected in real time.
The system has a short-circuit protection function in the embodiment of the present invention: the protection device meets the requirements of selectivity, fastness, sensitivity and reliability. Local or remote bipolar short-circuit fault can be removed separately, and the short circuit of each level can meet the requirement of staged protection. The impulse closing current and short-circuit current of closing loop of a high-voltage switch, especially an electro-magnetic operation mechanism, can be distinguished correctly. After a DC branch circuit trips due to short circuit, the device can disable and enable the reclosing switch of the branch circuit or adjust the time of the reclosing switch. The state of circuit breaker of the DC system can be controlled by a computer remotely. All the standby power switches are provided with a soft strap for disabling and enabling.
It has the function of enabling the standby power branch circuit automatically: after the DC circuit breaker of the running branch circuit trips due to protection action, the device can automatically adjust the power supply way of the system in real time and automatically enable the standby branch circuit.
The device can further add a flasher to the DC bus bar as required. The device can realize the automatic generation and post disturbance review of a data report.
One embodiment of the present invention further provides a DC power test system. The DC power test system includes: a test cabinet, which is configured to arrange a circuit breaker and a fuser to be tested and includes a plurality of control switches for controlling the connection ways of the circuit breaker to be tested and the fuser to be tested; a resistor cabinet, which is configured to arrange a resistor connected with the DC circuits for the circuit breaker to be tested and the fuser to be tested, so as to adjust the DC test current; and a control cabinet, which is connected with the test cabinet and is configured to send a control signal to the control switches.
The control cabinet can operate a control switch to change the connection way of a component to be tested, such as a circuit breaker and a fuser, and change the resistance of the resistor in the DC circuit, so as to finally change the current of the circuit and test the circuit breaker to be tested and the fuser to be tested.
The DC power test system further includes: a storage battery, which is connected with the test cabinet and the resistor cabinet respectively and is configured to provide DC power to the test cabinet and the resistor cabinet;
and a charging cabinet, which is connected with the storage battery and is configured to charge the storage battery. There are two sets of storage batteries for standby.
AC power supply is changed into DC power supply through the storage battery and the charging cabinet, so as to provide DC power.
The DC power test system further includes: a multi-channel wave recorder, each channel of which is configured to acquire and save the current waveform of the DC circuit. And the data recorded by the wave recorder provides the basis for further analysis.
The DC power test system further includes: an analysis and verification module, which is connected with the test cabinet and is configured to acquire the action data of the circuit breaker to be tested and the fuser to be tested and analyze the protection sensitivity of the circuit breaker to be tested and the fuser to be tested according to the action data. The analysis and verification module acquires the current and voltage values in the circuit at the same time and records the action data of the circuit breaker to be tested and the fuser to be tested to compute the protection sensitivity of a component to be tested correspondingly, wherein the action data can include action contents and action time.
The analysis and verification module is further configured to acquire the device parameter of the DC power test system and analyze whether the device in the DC power test system meets the electrical design regulations according to the device parameter. The device parameter includes the parameter of the wire.
The analysis and verification module can be further configured to analyze whether the section size of the wire meets the requirement of the electrical design regulations. Besides, the analysis and verification module can further verify the configuration scheme according to the capacity of the storage battery, the rated value of the switch and the like.
The analysis and verification module can be further configured to analyze the selectivity of an upper part protective component and a lower part protective component in the DC power test system according to the action data. The selectivity of the upper and lower protective components can be analyzed through the action data of the circuit breaker to be tested and the fuser to be tested.
The DC power test system can further include: a result output module, which is connected with the analysis and verification module and is configured to output the analysis result of the analysis and verification module.
According to the DC power test system in the embodiment of the present invention, data can be acquired, saved and analyzed and a control order can be sent to the whole system via the computer.
The software part of the computer in this embodiment can be divided into five functional modules: database module, wire configuring module, type selecting module for protection electrical appliance, analysis and verification module for protection electrical appliance, result output module and the like. The analysis and verification module for protection electrical appliance includes:
wire/cable voltage drop verification, sensitivity verification for protection electrical appliance, rated current verification, working voltage verification and verification for the selectivity protection of upper and lower circuit breakers. The software adopts a modular concept so that it is convenient to manage and maintain and provides the basis for its upgrading.
1. Database module The database is the basis of the whole system, and provides basic data for the wire arrangement and component selection and parameters for the verification and computation. The database structure is designed with the requirements of three database patterns as the criterion, and is planned according to the actual requirement to ensure that the database is convenient and simple to add, modify, delete and maintain, and strung in expandability; and the validity of input data can be judged.
2. Wire configuration module According to the structure of an actual DC power system, the wire configuration module is divided into four parts: a storage battery, a feeder screen, a distribution screen and a measurement and control protection screen, wherein the storage battery module includes a storage battery, an exit protection component, a charging device, a charging loop switch and a discharging device; the feeder screen includes a feeder screen cable and a feeder screen protection switch;
the distribution screen includes a distribution screen cable and a distribution screen protection switch; and the measurement and control protection screen includes a measurement and control protection screen cable, a measurement and control protection screen protection switch and a load.
3. Type selection module for protection electrical appliance After a wire is configured completely, load current should be arranged at first, then, the component in the DC systems is selected and arranged, mainly including type selection for the protection component and the wire/cable.
4. Analysis and verification module for protection electrical appliance The main function of the software is to select rational verification for each component in the DC power system, and the main verification includes pressure drop verification for a wire/cable, sensitivity verification for a protection component and selectivity verification for upper part and lower part protection components.
Pressure drop verification for wire/cable.
The reason why pressure drop for wire/cable is analyzed is mainly because the selection of section size of wire/cable is not emphasized in a common DC
system and pressure drop may be too much due to undersize section to not meet the requirement. The verification for drop pressure of the wire/cable is mainly decided by design technical regulations of electrical power engineering DC
system of DUT 5044-2004.
Sensitivity verification for protection cornponent.
The rated current specification of the protection component should be selected according to the actual normal working current of the DC system, and should not be too much (which may cause refuse operation) and too little (which may cause maloperation). The so-called sensitivity analysis refers to the verification of a unipolar protection component, i.e., judging whether the protection component may refuse operation in case of fault current in the DC system.
If the sensitivity of the protection component needs to be verified, the . .
magnitude of short-circuit current at each part in the DC power system will be computed at first. After the short-circuit current value at each part in the DC
power system is obtained, it is necessary to determine the location with the harshest sensitivity requirement for the protection component, i.e., the location with the lowest sensitivity; and this location is taken as the standard for verifying whether the sensitivity of the protection component meets the requirement during the actual analysis. If the protection component can meet the sensitivity requirement under the harshest condition, it is indicated that the protection component may not refuse operation. When the sensitivity of the protection component is analyzed in the software, the end of the protection component connected with the wire/cable is taken as the judgment standard. This is because the end of the wire/cable has the least short-circuit current, and relatively, the sensitivity of the protection component here is the lowest, so this location is the harshest one for judging sensitivity.
After the location for judging sensitivity is determined, the sensitivity of the protection component can be determined. The protection component is divided into a circuit breaker and a fuser. The circuit breaker contains two sections and three sections for protection.
Selectivity analysis and verification for upper part and lower part protection components.
Current limiting characteristics can be introduced when the selectivity of upper and lower protection components is verified in the software, and the judgment result is more approximated to the actual condition. When the selectivity is analyzed, it is also necessary to find a location with the harshest condition in the system to judge whether the selectivity meets the requirement, wherein the location with the harshest condition refers to that with the highest short-circuit current. This is because the higher the short-circuit current is, the more easily the upper protection component may maloperate. Therefore, when the selectivity is judged, the lower part of the lower switch is taken as the location with the harshest . .
condition, i.e., the location with the highest short-circuit current.
5. Result output module After the verification and analysis, the computation result can be output, the output contents of bresult output module mainly include wire configuration diagram output and analysis report output. The wire configuration diagram can be a picture, which is used for intuitively displaying the structure layout, component type selection and stage difference cooperation verification condition of the whole DC
power system. The analysis report is an Excel file for recording the component type selection information and the verification judgment conclusion; and the technical staff can refer to the information for the design process of the DC
power system.
To sum up, the present invention has the following advantages:
1. The AC power and the DC power are wired by layered and shielded way, so that the data transmission precision is improved.
2. All small electrical appliances are assembled in a box so that the space is saved and the wiring is more rational and beautiful.
3. Data is processed by algorithms, such as breadth first, depth first and topological sorting, so that the control precision and the millisecond conversion time are improved.
4. CDT and 103 regulations is adopted in the remote communication party, so that the compatibility with other devices in the centralized control center is improved.
5. A three-sectional protection circuit breaker is added for the current identification at the end so that the reliability of software and hardware is improved.
According to the technical scheme of the present invention, the breaking characteristics of common DC circuit breakers and fusers of different sizes from different manufacturers are tested and the stage difference cooperation between the circuit breakers and the fusers is also tested by simulating the actual operation environment of a power distribution DC system; a stage difference cooperation test station is constructed for the DC system to master the stage difference cooperation characteristics of various combined domestic and imported circuit breakers and fusers of different sizes from different manufacturers in the DC power system of electrical engineering and discuss the condition of implementing the selectivity action of each protection component of the DC system by testing the stage difference cooperation of the DC circuit breaker and the fuser under a DC
short-circuit condition a lot, thereby recommending a rational selectivity protection scheme for the configuration of protection components of the DC system.
Therefore, the objectives of safety, practicality and accuracy in the electrical application are achieved.
What said above are only the preferred embodiments of the present invention and not intended to limit the present invention. For those skilled in the technical, various modifications and changes can be made in the present invention. Any changes, equivalent replacements, improvements and the like made within the principle and principle of the present invention shall be included in the scope of protection of the present invention.
For the above reasons, the protection selection of the DC system is significant for the normal operation of the DC system. Whereas, there is no way for testing the DC power system in the prior art, so the construction for the DC power system will not be tested for verification. And there is still no effective solution for the absence of test environment of the DC power system in the prior art.
Summary To solve the problem, the present invention discloses a DC power dynamic analog simulation system so as to provide a test platform for the stage difference cooperation between breakers of different sizes and a breaker and a fuser, and make them safe, practical and accurate in the electrical application.
To achieve this objective, the technical scheme of the present invention is as follows:
A DC power dynamic analog simulation system includes at least one storage battery, a charging cabinet, a control cabinet, a test cabinet, a resistor cabinet, a feeder cabinet, an emergency lighting cabinet, a communication power cabinet, and an AC power distribution cabinet. The communication power cabinet and the emergency lighting cabinet are electrically connected to the AC power distribution cabinet. The charging cabinet converts the alternating current of the AC power distribution cabinet into direct current, and stores the direct current into the at least one storage battery. The at least one storage battery and the charging cabinet provide DC power to the test cabinet and the feeder cabinet through a selector switch. A sliding resistor in the resistor cabinet adjusts the current magnitude in a test cabinet circuit. The control cabinet controls the test cabinet through a control switch. The feeder cabinet is electrically connected to the at least one storage battery According to a preferred embodiment of the present invention, there are two sets of storage batteries.
According to a preferred embodiment of the present invention, the test cabinet is a platform for testing the stage difference cooperation between a circuit breaker and a fuser.
According to a preferred embodiment of the present invention, the system is connected with a computer for controlling the whole system.
According to a preferred embodiment of the present invention, the circuits for the resistor cabinet and the test cabinet are connected with a multi-channel wave recorder, which is configured to acquire the current waveforms of an adjustable resistor loop and a test loop respectively and record the current change trend in the process of testing the stage difference cooperation in real time, thereby providing the basis for analyzing the stage difference cooperation of protection component of the DC power system.
According to another aspect of the present invention, a DC power test system is also provided. The DC power test system includes: a test cabinet, in which a circuit breaker to be tested and a fuser to be tested are deployed, wherein the test cabinet comprises a plurality of control switches for controlling connection ways of the circuit breaker to be tested and the fuser to be tested;a resistor cabinet, in which at least one resistor is deployed, wherein the at least one resistor is connected in a DC circuit where the circuit breaker to be tested and the fuser to be tested are located; and a control cabinet, which is connected with the test cabinet and is configured to send a control signal to the plurality of control switches.
Furthermore, the DC power system further includes: at least one storage battery, which is connected with the test cabinet and the resistor cabinet respectively and is configured to provide DC power to the test cabinet and the resistor cabinet; and a charging cabinet, which is connected with the at least one storage battery and is configured to charge the at least one storage battery Furthermore, the DC power test system further includes: a multi-channel wave recorder, each channel of which is configured to acquire and save a current waveform of the DC circuit.
Furthermore, the DC power test system further includes: an analysis and verification module, which is connected with the test cabinet and is configured to acquire the action data of the circuit breaker to be tested and the fuser to be tested and analyze the protection sensitivity of the circuit breaker to be tested and the fuser to be tested according to the action data.
Furthermore, the analysis and verification module is further configured to acquire the device parameter of the DC power test system and analyze, according to the device parameter, whether the device in the DC power test system meets requirements of the electrical design regulations.
Furthermore, the device parameter includes a parameter of a wire. The analysis and verification module is further configured to analyze whether a section size of the wire meets requirements of the electrical design regulations.
Furthermore, the analysis and verification module is further configured to analyze selectivity of an upper protective component and a lower protective component in the DC power test system according to the action data.
Furthermore, the DC power test system further includes: a result output module, which is connected with the analysis and verification module and is configured to output the analysis result of an analysis and verification module.
According to the technical scheme of the present invention, the breaking characteristics of common DC circuit breakers and fusers of different sizes from different manufacturers are tested and the stage difference cooperation between the circuit breakers and the fusers is also tested by simulating the actual operation environment of a power distribution DC system; a stage difference cooperation test =
station is constructed for the DC system to master the stage difference cooperation characteristics of various combined domestic and imported circuit breakers and fusers of different sizes from different manufacturers in the DC power system of electrical engineering and discuss the condition of implementing the selectivity action of each protection component of the DC system by testing the stage difference cooperation of the DC circuit breaker and the fuser under a DC
short-circuit condition a lot, thereby recommending a rational selectivity protection scheme for the configuration of protection components of the DC system.
Therefore, the objectives of safety, practicality and accuracy in the electrical application are achieved.
Other characteristics and advantages of the system will be described in the following specification, and partially become clear in the specification or known by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained through the structures specified in the specification, claims and drawing.
The technical scheme of the present invention will be further described below through the drawing and embodiments in detail.
Brief description of the drawings The drawing is used for the further understanding of the present invention and constitutes one part of the specification to explain the present invention with embodiments of the present invention rather than limiting the present invention.
In the drawing, Fig. 1 is a diagram showing the electrical structure of a DC power dynamic analog simulation system in one embodiment of the present invention, wherein: 1-circuit breaker; 2-fuser.
Detailed description of the embodiments The preferred embodiments of the present invention will be described below in conjunction with the drawing, and it should be understood that the preferred embodiments described here are only used for describing and explaining the present invention instead of limiting the present invention.
As shown in Fig. 1, the DC power dynamic analog simulation system in this embodiment includes a storage battery, a charging cabinet, a control cabinet, a test cabinet, a resistor cabinet, a feeder cabinet, an emergency lighting cabinet, a communication power cabinet, and an AC power distribution cabinet. The communication power cabinet and the emergency lighting cabinet are electrically connected to the AC power distribution cabinet. The charging cabinet converts the alternating current of the AC power distribution cabinet into direct current, and stores the direct current into the storage battery. The storage battery and the charging cabinet provide DC power to the test cabinet and the feeder cabinet through a selector switch. A sliding resistor in the resistor cabinet adjusts the current magnitude in a test cabinet circuit. The control cabinet controls the test cabinet through a control switch. The feeder cabinet is electrically connected to the at least one storage battery There are two sets of storage batteries for standby. The test cabinet is a platform for testing the stage difference cooperation between a circuit breaker and a fuser. The system is connected with a computer for controlling the whole system.
The circuits for the resistor cabinet and the test cabinet are connected with a multi-channel recorder, which is configured to acquire the current waveforms of an adjustable resistor loop and a test loop respectively and record the current change trend in the process of testing the stage difference cooperation in real time, so as to provide the basis for analyzing the stage difference cooperation of protection component of the DC power system.
The DC power supply feeder system adopts a radiated power supply network.
Namely, the DC load of each level of the DC system is usually provided with two DC power supplies, and usually, one of them runs and the other one is for hot standby. If the one running is abnormal, such as short circuit tripping, the standby one can run automatically.
The system records the event name, action time, event contents and other related contents in the Sequence Of Event (SOE) in detail, so as to analyze and judge the fault. The system has a strong communication function so that it can realize communication of various regulations and different communication media and also the communication of other systems.
DC grounded detection: the grounded branch circuit, grounded resistance, polarity and the like of the bus bar and each branch circuit of the DC power system are detected or displayed in real time, and the condition of the faulted branch circuit is also detected in real time.
Since the feeder short-circuit protection device can correctly distinguish the impulse closing current of closing loop of an AC high-voltage circuit breaker and the short-circuit current of a DC system, it can quickly identify and selectively remove the short-circuit fault of the DC power system and can further adjust the running way of the system in time and automatically enable the DC standby power supply.
The circuit breaker can implement local and remote operation. The control device of the circuit breaker can correctly reflect the short-circuit fault of the DC
system, and can further remove the faulted branch circuit quickly and enable a corresponding standby branch circuit, thereby improving the operation reliability of the system.
The operation way of the DC power feeder can achieve real-time monitoring by a computer, namely, the operation way of the DC feeder can be controlled remotely or locally, so that the standby power branch circuit of the DC feeder can be enabled or removed automatically, and the state parameters of the bus bar and each branch circuit of the DC system are monitored.
The system is provided with an automatic control and protection device for the DC system, which can monitor the load current, grounded current and grounded resistance of each loop and control each loop breaker. The system can further monitor the operation state and operation parameter of the whole DC system in an on-line way, so as to realize a "four remote functions".
The circuit breakers for the closing power branch circuit and the control power branch circuit of the DC system adopt an ABB or an imported product of the same level and are provided with an electrical operation mechanism, with capacity configured according to the loop parameter. The circuit breaker for the operation feeder branch circuit adopts a DC circuit breaker with an automatic delaying and segmenting function, which is manufactured from the Beijing People's electrical appliance factory.
The DC system should have an emergency illumination automatic switching function.
The system further has a grounded detection function: completing the insulated automatic real-time detection of the DC system. The detection process does not cause the fluctuation of grounded voltage of the DC bus bar. It has the function of uni-pole and multi-pole grounded wire selection and can detect the wire crossing of the feeder branch circuits automatically. It can further judge grounded faults at multiple points, displays them in a picture in time and gives an alarm, and shows the grounded branch circuit and its polarity. The bus bar voltage, branch circuit current and other state parameters of the DC system are detected in real time.
The system has a short-circuit protection function in the embodiment of the present invention: the protection device meets the requirements of selectivity, fastness, sensitivity and reliability. Local or remote bipolar short-circuit fault can be removed separately, and the short circuit of each level can meet the requirement of staged protection. The impulse closing current and short-circuit current of closing loop of a high-voltage switch, especially an electro-magnetic operation mechanism, can be distinguished correctly. After a DC branch circuit trips due to short circuit, the device can disable and enable the reclosing switch of the branch circuit or adjust the time of the reclosing switch. The state of circuit breaker of the DC system can be controlled by a computer remotely. All the standby power switches are provided with a soft strap for disabling and enabling.
It has the function of enabling the standby power branch circuit automatically: after the DC circuit breaker of the running branch circuit trips due to protection action, the device can automatically adjust the power supply way of the system in real time and automatically enable the standby branch circuit.
The device can further add a flasher to the DC bus bar as required. The device can realize the automatic generation and post disturbance review of a data report.
One embodiment of the present invention further provides a DC power test system. The DC power test system includes: a test cabinet, which is configured to arrange a circuit breaker and a fuser to be tested and includes a plurality of control switches for controlling the connection ways of the circuit breaker to be tested and the fuser to be tested; a resistor cabinet, which is configured to arrange a resistor connected with the DC circuits for the circuit breaker to be tested and the fuser to be tested, so as to adjust the DC test current; and a control cabinet, which is connected with the test cabinet and is configured to send a control signal to the control switches.
The control cabinet can operate a control switch to change the connection way of a component to be tested, such as a circuit breaker and a fuser, and change the resistance of the resistor in the DC circuit, so as to finally change the current of the circuit and test the circuit breaker to be tested and the fuser to be tested.
The DC power test system further includes: a storage battery, which is connected with the test cabinet and the resistor cabinet respectively and is configured to provide DC power to the test cabinet and the resistor cabinet;
and a charging cabinet, which is connected with the storage battery and is configured to charge the storage battery. There are two sets of storage batteries for standby.
AC power supply is changed into DC power supply through the storage battery and the charging cabinet, so as to provide DC power.
The DC power test system further includes: a multi-channel wave recorder, each channel of which is configured to acquire and save the current waveform of the DC circuit. And the data recorded by the wave recorder provides the basis for further analysis.
The DC power test system further includes: an analysis and verification module, which is connected with the test cabinet and is configured to acquire the action data of the circuit breaker to be tested and the fuser to be tested and analyze the protection sensitivity of the circuit breaker to be tested and the fuser to be tested according to the action data. The analysis and verification module acquires the current and voltage values in the circuit at the same time and records the action data of the circuit breaker to be tested and the fuser to be tested to compute the protection sensitivity of a component to be tested correspondingly, wherein the action data can include action contents and action time.
The analysis and verification module is further configured to acquire the device parameter of the DC power test system and analyze whether the device in the DC power test system meets the electrical design regulations according to the device parameter. The device parameter includes the parameter of the wire.
The analysis and verification module can be further configured to analyze whether the section size of the wire meets the requirement of the electrical design regulations. Besides, the analysis and verification module can further verify the configuration scheme according to the capacity of the storage battery, the rated value of the switch and the like.
The analysis and verification module can be further configured to analyze the selectivity of an upper part protective component and a lower part protective component in the DC power test system according to the action data. The selectivity of the upper and lower protective components can be analyzed through the action data of the circuit breaker to be tested and the fuser to be tested.
The DC power test system can further include: a result output module, which is connected with the analysis and verification module and is configured to output the analysis result of the analysis and verification module.
According to the DC power test system in the embodiment of the present invention, data can be acquired, saved and analyzed and a control order can be sent to the whole system via the computer.
The software part of the computer in this embodiment can be divided into five functional modules: database module, wire configuring module, type selecting module for protection electrical appliance, analysis and verification module for protection electrical appliance, result output module and the like. The analysis and verification module for protection electrical appliance includes:
wire/cable voltage drop verification, sensitivity verification for protection electrical appliance, rated current verification, working voltage verification and verification for the selectivity protection of upper and lower circuit breakers. The software adopts a modular concept so that it is convenient to manage and maintain and provides the basis for its upgrading.
1. Database module The database is the basis of the whole system, and provides basic data for the wire arrangement and component selection and parameters for the verification and computation. The database structure is designed with the requirements of three database patterns as the criterion, and is planned according to the actual requirement to ensure that the database is convenient and simple to add, modify, delete and maintain, and strung in expandability; and the validity of input data can be judged.
2. Wire configuration module According to the structure of an actual DC power system, the wire configuration module is divided into four parts: a storage battery, a feeder screen, a distribution screen and a measurement and control protection screen, wherein the storage battery module includes a storage battery, an exit protection component, a charging device, a charging loop switch and a discharging device; the feeder screen includes a feeder screen cable and a feeder screen protection switch;
the distribution screen includes a distribution screen cable and a distribution screen protection switch; and the measurement and control protection screen includes a measurement and control protection screen cable, a measurement and control protection screen protection switch and a load.
3. Type selection module for protection electrical appliance After a wire is configured completely, load current should be arranged at first, then, the component in the DC systems is selected and arranged, mainly including type selection for the protection component and the wire/cable.
4. Analysis and verification module for protection electrical appliance The main function of the software is to select rational verification for each component in the DC power system, and the main verification includes pressure drop verification for a wire/cable, sensitivity verification for a protection component and selectivity verification for upper part and lower part protection components.
Pressure drop verification for wire/cable.
The reason why pressure drop for wire/cable is analyzed is mainly because the selection of section size of wire/cable is not emphasized in a common DC
system and pressure drop may be too much due to undersize section to not meet the requirement. The verification for drop pressure of the wire/cable is mainly decided by design technical regulations of electrical power engineering DC
system of DUT 5044-2004.
Sensitivity verification for protection cornponent.
The rated current specification of the protection component should be selected according to the actual normal working current of the DC system, and should not be too much (which may cause refuse operation) and too little (which may cause maloperation). The so-called sensitivity analysis refers to the verification of a unipolar protection component, i.e., judging whether the protection component may refuse operation in case of fault current in the DC system.
If the sensitivity of the protection component needs to be verified, the . .
magnitude of short-circuit current at each part in the DC power system will be computed at first. After the short-circuit current value at each part in the DC
power system is obtained, it is necessary to determine the location with the harshest sensitivity requirement for the protection component, i.e., the location with the lowest sensitivity; and this location is taken as the standard for verifying whether the sensitivity of the protection component meets the requirement during the actual analysis. If the protection component can meet the sensitivity requirement under the harshest condition, it is indicated that the protection component may not refuse operation. When the sensitivity of the protection component is analyzed in the software, the end of the protection component connected with the wire/cable is taken as the judgment standard. This is because the end of the wire/cable has the least short-circuit current, and relatively, the sensitivity of the protection component here is the lowest, so this location is the harshest one for judging sensitivity.
After the location for judging sensitivity is determined, the sensitivity of the protection component can be determined. The protection component is divided into a circuit breaker and a fuser. The circuit breaker contains two sections and three sections for protection.
Selectivity analysis and verification for upper part and lower part protection components.
Current limiting characteristics can be introduced when the selectivity of upper and lower protection components is verified in the software, and the judgment result is more approximated to the actual condition. When the selectivity is analyzed, it is also necessary to find a location with the harshest condition in the system to judge whether the selectivity meets the requirement, wherein the location with the harshest condition refers to that with the highest short-circuit current. This is because the higher the short-circuit current is, the more easily the upper protection component may maloperate. Therefore, when the selectivity is judged, the lower part of the lower switch is taken as the location with the harshest . .
condition, i.e., the location with the highest short-circuit current.
5. Result output module After the verification and analysis, the computation result can be output, the output contents of bresult output module mainly include wire configuration diagram output and analysis report output. The wire configuration diagram can be a picture, which is used for intuitively displaying the structure layout, component type selection and stage difference cooperation verification condition of the whole DC
power system. The analysis report is an Excel file for recording the component type selection information and the verification judgment conclusion; and the technical staff can refer to the information for the design process of the DC
power system.
To sum up, the present invention has the following advantages:
1. The AC power and the DC power are wired by layered and shielded way, so that the data transmission precision is improved.
2. All small electrical appliances are assembled in a box so that the space is saved and the wiring is more rational and beautiful.
3. Data is processed by algorithms, such as breadth first, depth first and topological sorting, so that the control precision and the millisecond conversion time are improved.
4. CDT and 103 regulations is adopted in the remote communication party, so that the compatibility with other devices in the centralized control center is improved.
5. A three-sectional protection circuit breaker is added for the current identification at the end so that the reliability of software and hardware is improved.
According to the technical scheme of the present invention, the breaking characteristics of common DC circuit breakers and fusers of different sizes from different manufacturers are tested and the stage difference cooperation between the circuit breakers and the fusers is also tested by simulating the actual operation environment of a power distribution DC system; a stage difference cooperation test station is constructed for the DC system to master the stage difference cooperation characteristics of various combined domestic and imported circuit breakers and fusers of different sizes from different manufacturers in the DC power system of electrical engineering and discuss the condition of implementing the selectivity action of each protection component of the DC system by testing the stage difference cooperation of the DC circuit breaker and the fuser under a DC
short-circuit condition a lot, thereby recommending a rational selectivity protection scheme for the configuration of protection components of the DC system.
Therefore, the objectives of safety, practicality and accuracy in the electrical application are achieved.
What said above are only the preferred embodiments of the present invention and not intended to limit the present invention. For those skilled in the technical, various modifications and changes can be made in the present invention. Any changes, equivalent replacements, improvements and the like made within the principle and principle of the present invention shall be included in the scope of protection of the present invention.
Claims (13)
1. A DC power dynamic analog simulation system, comprising: at least one storage battery, a charging cabinet, a control cabinet, a test cabinet, a resistor cabinet, a feeder cabinet, an emergency lighting cabinet, a communication power cabinet, and an AC power distribution cabinet, wherein the communication power cabinet and the emergency lighting cabinet are electrically connected to the AC
power distribution cabinet; the charging cabinet converts an alternating current of the AC power distribution cabinet into a direct current, and stores the direct current into the at least one storage battery; the at least one storage battery and the charging cabinet provide DC power to the test cabinet and the feeder cabinet through a selector switch; a sliding resistor in the resistor cabinet adjusts a current magnitude in a circuit of the test cabinet; the control cabinet controls the test cabinet through a control switch; and the feeder cabinet is electrically connected to the at least one storage battery.
power distribution cabinet; the charging cabinet converts an alternating current of the AC power distribution cabinet into a direct current, and stores the direct current into the at least one storage battery; the at least one storage battery and the charging cabinet provide DC power to the test cabinet and the feeder cabinet through a selector switch; a sliding resistor in the resistor cabinet adjusts a current magnitude in a circuit of the test cabinet; the control cabinet controls the test cabinet through a control switch; and the feeder cabinet is electrically connected to the at least one storage battery.
2. The DC power dynamic analog simulation system according to claim 1, wherein there are two sets of storage batteries.
3. The DC power dynamic analog simulation system according to claim 1 or 2, wherein the test cabinet is a platform for testing stage difference cooperation between a circuit breaker and a fuser.
4. The DC power dynamic analog simulation system according to claim 3, wherein the system is connected with a computer for controlling the whole system.
5. The DC power dynamic analog simulation system according to claim 3, wherein circuits for the resistor cabinet and the test cabinet are connected with a multi-channel wave recorder.
6. A DC power test system, comprising:
a test cabinet, in which a circuit breaker to be tested and a fuser to be tested are deployed, wherein the test cabinet comprises a plurality of control switches for controlling connection ways of the circuit breaker to be tested and the fuser to be tested;
a resistor cabinet, in which at least one resistor is deployed, wherein the at least one resistor is connected in a DC circuit where the circuit breaker to be tested and the fuser to be tested are located; and a control cabinet, which is connected with the test cabinet and is configured to send a control signal to the plurality of control switches.
a test cabinet, in which a circuit breaker to be tested and a fuser to be tested are deployed, wherein the test cabinet comprises a plurality of control switches for controlling connection ways of the circuit breaker to be tested and the fuser to be tested;
a resistor cabinet, in which at least one resistor is deployed, wherein the at least one resistor is connected in a DC circuit where the circuit breaker to be tested and the fuser to be tested are located; and a control cabinet, which is connected with the test cabinet and is configured to send a control signal to the plurality of control switches.
7. The DC power test system according to claim 6, further comprising:
at least one storage battery, which is connected with the test cabinet and the resistor cabinet respectively and is configured to provide DC power to the test cabinet and the resistor cabinet; and a charging cabinet, which is connected with the at least one storage battery and is configured to charge the at least one storage battery.
at least one storage battery, which is connected with the test cabinet and the resistor cabinet respectively and is configured to provide DC power to the test cabinet and the resistor cabinet; and a charging cabinet, which is connected with the at least one storage battery and is configured to charge the at least one storage battery.
8. The DC power test system according to claim 6, further comprising:
a multi-channel wave recorder, each channel of which is configured to acquire and save a current waveform of the DC circuit.
a multi-channel wave recorder, each channel of which is configured to acquire and save a current waveform of the DC circuit.
9. The DC power test system according to claim 6, further comprising:
an analysis and verification module, which is connected with the test cabinet and is configured to acquire action data of the circuit breaker to be tested and the fuser to be tested and analyze protection sensitivity of the circuit breaker to be tested and the fuser to be tested according to the action data.
an analysis and verification module, which is connected with the test cabinet and is configured to acquire action data of the circuit breaker to be tested and the fuser to be tested and analyze protection sensitivity of the circuit breaker to be tested and the fuser to be tested according to the action data.
10. The DC power test system according to claim 9, wherein the analysis and verification module is further configured to acquire device parameter of the DC power test system and analyze, according to the device parameter, whether a device in the DC power test system meets requirements of electrical design regulations.
11. The DC power test system according to claim 10, wherein the device parameter comprises a parameter of a wire; and the analysis and verification module is further configured to analyze whether a section size of the wire meets requirements of the electrical design regulations.
12. The DC power test system according to claim 9, wherein the analysis and verification module is further configured to analyze selectivity of an upper protective component and a lower protective component in the DC power test system according to the action data.
13. The DC power test system according to any one of claims 9 to 12, further comprising:
a result output module, which is connected with the analysis and verification module and is configured to output an analysis result of the analysis and verification module.
a result output module, which is connected with the analysis and verification module and is configured to output an analysis result of the analysis and verification module.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100583631A CN102590743B (en) | 2012-03-07 | 2012-03-07 | Dynamic analog simulation system of direct-current power supply |
| CN201210058363.1 | 2012-03-07 | ||
| PCT/CN2012/086786 WO2013131392A1 (en) | 2012-03-07 | 2012-12-17 | Dc power supply dynamic simulation system and dc power supply test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2866400A1 true CA2866400A1 (en) | 2013-09-12 |
Family
ID=46479663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2866400A Abandoned CA2866400A1 (en) | 2012-03-07 | 2012-12-17 | Dc power dynamic analog simulation system and dc power test system |
Country Status (3)
| Country | Link |
|---|---|
| CN (2) | CN102590743B (en) |
| CA (1) | CA2866400A1 (en) |
| WO (1) | WO2013131392A1 (en) |
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|---|---|---|---|---|
| CN102590743B (en) * | 2012-03-07 | 2013-11-20 | 甘肃电力科学研究院 | Dynamic analog simulation system of direct-current power supply |
| CN107966652A (en) * | 2016-10-20 | 2018-04-27 | 国网新疆电力公司疆南供电公司 | A kind of transforming plant DC electric power loop Graded coordination test device |
| CN106786498B (en) * | 2016-11-10 | 2023-02-03 | 中国电力科学研究院 | Master station-transformer substation data collaborative identification method and device |
| CN107947332B (en) * | 2017-09-13 | 2020-02-07 | 浙江时通电气制造有限公司 | Vehicle-mounted mobile direct-current emergency power box |
| CN109541352B (en) * | 2018-11-29 | 2023-12-05 | 国网江西省电力有限公司电力科学研究院 | Bus parallel load scheduling method and device for off-vehicle charger detection device |
| CN109884456B (en) * | 2019-04-02 | 2023-10-13 | 山西汾西重工有限责任公司 | Power module and direct current fuse short circuit test platform |
| CN112180247B (en) * | 2020-09-11 | 2022-09-16 | 上海二十冶建设有限公司 | Concentrated online test method for operating mechanisms of vacuum circuit breakers of high-voltage cabinets in line |
| CN112329911B (en) * | 2020-10-20 | 2023-04-07 | 上海钧正网络科技有限公司 | Charging abnormity determining method and device |
| CN114489018A (en) * | 2020-11-26 | 2022-05-13 | 重庆科凯前卫风电设备有限责任公司 | Fan system flexibility test platform and test method |
| CN113381500B (en) * | 2021-06-08 | 2024-03-19 | 北京百度网讯科技有限公司 | Power switching method, device and system and electronic equipment |
| CN115203977B (en) * | 2022-08-24 | 2023-03-24 | 国网信息通信产业集团有限公司 | Power grid simulation system |
| CN117610287A (en) * | 2023-11-29 | 2024-02-27 | 国网上海市电力公司 | Three-dimensional visual simulation method for single-point ground fault of direct-current system of transformer substation |
| CN117805607B (en) * | 2024-02-29 | 2024-05-07 | 山西漳电科学技术研究院(有限公司) | DC level difference matching test method for power plant DC system |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61237066A (en) * | 1985-04-12 | 1986-10-22 | Mitsubishi Electric Corp | Switchboard testing circuit |
| CN2430806Y (en) * | 2000-01-20 | 2001-05-16 | 烟台东方电子信息产业集团有限公司 | Intelligent phase control DC power device for transforming station |
| JP2003235181A (en) * | 2002-02-08 | 2003-08-22 | Toshiba Corp | Power plant/substation system |
| JP2007519924A (en) * | 2004-01-30 | 2007-07-19 | アーベーベー テヒノロギー リミテッド | Distribution device status monitor |
| CN2845273Y (en) * | 2005-08-03 | 2006-12-06 | 苏州市苏开电气成套有限公司 | Contact screen style program controlled phase controlling D.C.power source device |
| CN101581763A (en) * | 2008-05-17 | 2009-11-18 | 陈书欣 | Tester for testing operating characteristics of DC circuit breaker |
| CN201540354U (en) * | 2009-03-26 | 2010-08-04 | 四川电力试验研究院 | DC circuit breaker characteristic parameter automatic testing system |
| CN201466696U (en) * | 2009-06-02 | 2010-05-12 | 河北德普电器有限公司 | Integrated monitoring device of stage head protection and grounding for DC system |
| CN201774301U (en) * | 2010-06-24 | 2011-03-23 | 甘肃省电力公司兰州供电公司 | High frequency switch DC supply system for substation |
| CN102590743B (en) * | 2012-03-07 | 2013-11-20 | 甘肃电力科学研究院 | Dynamic analog simulation system of direct-current power supply |
-
2012
- 2012-03-07 CN CN2012100583631A patent/CN102590743B/en not_active Expired - Fee Related
- 2012-03-07 CN CN2012200831478U patent/CN202486287U/en not_active Expired - Lifetime
- 2012-12-17 WO PCT/CN2012/086786 patent/WO2013131392A1/en active Application Filing
- 2012-12-17 CA CA2866400A patent/CA2866400A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| CN202486287U (en) | 2012-10-10 |
| CN102590743B (en) | 2013-11-20 |
| CN102590743A (en) | 2012-07-18 |
| WO2013131392A1 (en) | 2013-09-12 |
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