CN117713330A - Hot standby control system of direct-current power supply of transformer substation - Google Patents
Hot standby control system of direct-current power supply of transformer substation Download PDFInfo
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Abstract
The invention discloses a hot standby control system of a direct-current power supply of a transformer substation, which comprises the following components: a battery pack module dividing a battery into a plurality of battery packs; the on-line monitoring module is used for detecting the voltage value of the direct current bus and the state of each storage battery pack in real time; the analysis control module is preset with the required voltage of the direct current bus, analyzes the difference between the current voltage value and the required voltage, calculates the time required by the stable voltage of the storage battery according to the difference and the current state of each storage battery, selects the storage battery combination mode with the shortest time and generates a corresponding control instruction; the standby voltage stabilizing module is used for controlling the action of supplying or absorbing electric energy to the direct current bus by the storage battery pack according to the corresponding control instruction; the invention realizes the hot standby of the storage battery, stabilizes the bus voltage in a charging or discharging mode when the voltage is unstable, can monitor the voltage and the state in real time, automatically control the stabilized voltage, dynamically adjust the operation of the storage battery, and reduce the time required for stabilization.
Description
Technical Field
The invention relates to the technical field of transformer substation control, in particular to a transformer substation direct-current power supply hot standby control system.
Background
The direct current system of the transformer substation is an important component part of the electric power secondary system, is a basis for controlling and protecting the electric power system, and is also a guarantee for ensuring that accidents can be rapidly treated; when a transformer station fails, abnormal direct-current voltage output is caused, so that the storage battery pack is required to discharge to maintain normal operation of loads such as a circuit, a control module and the like, but because the storage battery packs are in a series mode, if one section fails, the storage battery pack cannot normally output, and the direct-current bus is out of voltage and the control module cannot work due to power failure;
the reasons for causing the bus voltage loss of the direct current system generally include two types of disconnection of a storage battery pack and disconnection of a storage battery protection circuit; therefore, the solving means also often carries out protection scheme design from the perspective of solving the problem of single battery failure; reliability improvement schemes including a storage battery bridging technology, a storage battery boosting parallel technology and a storage battery grouping redundancy technology are adopted at present; however, there are certain problems: the bridging technique has the disadvantage that when there are more faulty cells, it can cause the battery voltage to be too low to work properly; the parallel boosting of the battery pack increases the complexity of the system; the grouping redundancy changes the arrangement mode of the original battery pack and changes the structure of the original charging system;
accordingly, the present application provides a hot standby control system for a dc power supply of a transformer substation to solve the above-mentioned problems.
Disclosure of Invention
In order to solve the problems, the invention provides the following technical scheme:
a hot standby control system for a substation direct current power supply, comprising:
the storage battery pack module divides the storage batteries into storage battery packs in equal quantity and is used for supplying or absorbing electric energy for the direct current bus;
the on-line monitoring module is connected with the direct current bus and the storage battery pack module and is used for detecting the voltage value of the direct current bus and the state information of each storage battery pack in real time;
the analysis control module is connected with the on-line monitoring module and is used for presetting the required voltage of the direct current bus, analyzing the difference data of the current voltage value and the required voltage of the direct current bus, calculating the time required by the stable voltage of each storage battery according to the difference data and the state information of each storage battery, selecting the storage battery combination mode with the shortest time and generating a corresponding control instruction;
and the standby voltage stabilizing module is connected with the analysis control module and the storage battery pack module and is used for controlling the actions of supplying or absorbing electric energy for the direct current bus by each storage battery pack according to the corresponding control instruction.
Preferably, in the above-mentioned hot standby control system for a direct-current power supply of a transformer substation, the battery module includes:
the dividing unit is used for obtaining the quantity of the storage batteries and equally dividing the quantity of the storage batteries into a plurality of storage battery packs; each storage battery pack independently operates;
and the numbering unit is connected with the dividing unit and is used for setting an independent number for each storage battery pack according to the dividing result.
Preferably, in the above-mentioned hot standby control system for a dc power supply of a transformer substation, the on-line monitoring module includes:
the voltage detection unit is connected with the direct current bus and used for detecting current voltage data of the direct current bus in real time;
the capacity detection unit is connected with each storage battery pack and the numbering unit and is used for detecting the current capacity value of each storage battery pack in real time and correspondingly inserting the number of each storage battery pack into the detected capacity value to generate current capacity data;
the discharge rate detection unit is connected with the storage battery pack and the numbering unit and is used for obtaining the rated discharge rate of each storage battery pack and inserting the corresponding number to generate discharge rate data;
the charging rate detection unit is connected with the storage battery pack and the numbering unit and is used for obtaining the limit charging rate of each storage battery pack and inserting corresponding numbers into the corresponding storage battery pack to generate charging rate data;
and the load detection unit is connected with the storage battery pack and the numbering unit and is used for acquiring the current generated by the current internal resistance of each storage battery pack and inserting the corresponding number into the generated load current data I.
Preferably, in the above-mentioned hot standby control system for a dc power supply of a transformer substation, the load detection unit further includes:
the load detection unit is connected with the standby voltage stabilizing module and is used for obtaining current generated by the internal resistor of the standby voltage stabilizing module and generating load current data II.
Preferably, in the above-mentioned hot standby control system for a dc power supply of a transformer substation, the analysis control module includes:
the voltage preset unit is used for presetting a required voltage which is a voltage range which needs to be reached under the condition that the direct current bus is stable;
the voltage analysis unit is connected with the voltage detection unit and is used for judging whether the current voltage data is in the range of the preset required voltage or not; calculating difference data of the current voltage data when the current voltage data exceeds or falls below the range of the preset required voltage; the difference data DeltaV is the absolute value of the difference between the current voltage data V0 and the preset demand voltage V1;
a first stable time calculation unit, connected to the voltage analysis unit and the capacity detection unit, the discharge rate detection unit and the load detection unit, and configured to respectively substitute, when the current voltage data is lower than the range of the preset required voltage, the difference data Δv, the current capacity data, the discharge rate data and the load current data of each storage battery pack into a first time calculation model, and obtain, through calculation, time data first required by each storage battery pack to enable the dc bus to reach stability;
a second stable time calculation unit, where the voltage analysis unit is connected to the capacity detection unit, the discharge rate detection unit, and the load detection unit, and is configured to, when the current voltage data exceeds the range of the preset required voltage, respectively substitute the difference data Δv, the current capacity data, the charge rate data, and the load current data of each storage battery into a second time calculation model, and obtain, through calculation, second time data required by each storage battery to enable the dc bus to reach stability;
the sorting unit is connected with the first stable time calculation unit and the second stable time calculation unit, sorts the first time data and generates a first sorting set; sorting the second time data to generate a second sorting set;
the scheme selection unit is connected with the sequencing unit and is used for selecting the storage battery pack corresponding to the time data one with the shortest time consumption in the sequencing set as a stable scheme when the current voltage data is lower than the range of the preset required voltage; when the current voltage data exceeds the range of the preset required voltage, selecting the storage battery pack corresponding to the time data II with the shortest time consumption in the second sorting set as a stabilizing scheme, and generating a corresponding control instruction; the stabilization scheme includes the number of the battery pack selected and corresponding time data.
Preferably, in the above-mentioned hot standby control system for a dc power supply of a transformer substation, the time calculation model one and the time calculation model two include:
the time calculation model one is t1= (c×Δv)/(id×io);
t1 is time data one which is required by the storage battery pack to enable the direct current bus to reach stability, and the unit is seconds; c is the current capacity data of the storage battery pack, and the unit is ampere-hour; id is discharge rate data in amperes; io is load current data two, in amperes;
the second time calculation model Is t2= (c×Δv)/(ic×is);
t2 is time data two which are required by the storage battery pack to enable the direct current bus to reach stability, and the unit is second; c is the current capacity data of the storage battery pack, and the unit is ampere-hour; ic is the charging rate data, and the unit is amperes; is load current data one in amperes.
Preferably, in the above-mentioned hot standby control system for a dc power supply of a transformer substation, the scheme selecting unit further includes:
selecting and combining the storage battery packs corresponding to a plurality of time data with shorter time consumption in the first sorting set or the second sorting set, calculating time data three required by stabilizing the direct current bus after the combination, substituting the time data three into the first sorting set or the second sorting set correspondingly, re-selecting the storage battery pack corresponding to the time data with the shortest time consumption in the first sorting set or the second sorting set as a stabilizing scheme, and generating a corresponding control instruction;
when the current voltage data is lower than the range of the preset required voltage, the time data III
Wherein n is the preset number of the storage battery packs in the storage battery pack combination,is the sum of the current capacity data of the storage battery packs of the preset quantity,/-or->The sum of the discharge rate data of each storage battery pack with the preset quantity is obtained, and Io is load current data II;
when the current voltage data exceeds the range of the preset required voltage, the time data is trit3=
Wherein n is the preset number of the storage battery packs in the storage battery pack combination,is the sum of the current capacity data of the storage battery packs of the preset quantity,/-or->Is the sum of the respective charge rate data of the preset number of storage battery packs,is the sum of the load current data of each storage battery pack of a preset number.
Preferably, in the above-mentioned hot standby control system for a dc power supply of a transformer substation, the standby voltage stabilizing module includes:
the instruction analysis unit is connected with the scheme selection unit and is used for receiving a control instruction and restoring the number in the stable scheme according to the control instruction;
one end of the rectifying and voltage stabilizing unit is connected with the direct current bus through a first circuit, and the other end of the rectifying and voltage stabilizing unit is connected with each storage battery pack through a second circuit; the rectification voltage stabilizing unit is used for controlling the communication state of the first circuit and the second circuit;
the control unit is connected with the instruction analysis unit and the rectification voltage stabilizing unit and is used for connecting the positive electrode of the direct current bus with the positive electrode of the storage battery pack with the corresponding number in the control instruction through the rectification voltage stabilizing unit when the current voltage data is lower than the range of the preset required voltage, connecting the negative electrode of the direct current bus with the negative electrode of the storage battery pack with the corresponding number in the control instruction, discharging the storage battery pack, and providing electric energy for the direct current bus to increase the voltage; starting timing after connection is completed, and disconnecting the connection relation between the storage battery pack and the direct current bus through the rectification voltage stabilizing unit when the timing time reaches corresponding time data;
when the current voltage data exceeds the range of the preset required voltage, connecting the positive electrode of the direct current bus with the negative electrode of the storage battery pack with the corresponding number in the control instruction through the rectification voltage stabilizing unit, connecting the negative electrode of the direct current bus with the positive electrode of the storage battery pack with the corresponding number in the control instruction, charging the storage battery pack, and obtaining the electric energy reducing voltage from the direct current bus; and starting timing after connection is completed, and disconnecting the connection relation between the storage battery pack and the direct current bus through the rectification voltage stabilizing unit when the timing time reaches corresponding time data.
Preferably, in the above-mentioned hot standby control system for a dc power supply of a transformer substation, the standby voltage stabilizing module further includes:
and the remote control unit is connected with the instruction analysis unit and is used for remotely transmitting the customized control instruction through the terminal equipment.
Preferably, in the above-mentioned hot standby control system for a dc power supply of a transformer substation, the system further includes:
and the safety protection module is connected with the storage battery module, the on-line monitoring module and the standby voltage stabilizing module and is used for performing power-off protection when each module has over-temperature, faults and output voltage lower than a normal operation allowable range.
According to the technical scheme, compared with the prior art, the application has the beneficial effects that:
the invention discloses a hot standby control system of a direct-current power supply of a transformer substation, which comprises the following components: a battery pack module dividing a battery into a plurality of battery packs; the on-line monitoring module is used for detecting the voltage value of the direct current bus and the state of each storage battery pack in real time; the analysis control module is preset with the required voltage of the direct current bus, analyzes the difference between the current voltage value and the required voltage, calculates the time required by the stable voltage of the storage battery according to the difference and the current state of each storage battery, selects the storage battery combination mode with the shortest time and generates a corresponding control instruction; the standby voltage stabilizing module is used for controlling the action of supplying or absorbing electric energy to the direct current bus by the storage battery pack according to the corresponding control instruction; the invention realizes the hot standby of the storage battery, stabilizes the bus voltage in a charging or discharging mode when the voltage is unstable, can monitor the voltage and the state in real time, automatically control the stabilized voltage, dynamically adjust the operation of the storage battery, and reduce the time required for stabilization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of a system of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In one embodiment, referring to fig. 1, a hot standby control system for a dc power supply of a substation includes:
the storage battery pack module divides the storage batteries into storage battery packs in equal quantity and is used for supplying or absorbing electric energy for the direct current bus;
the on-line monitoring module is connected with the direct current bus and the storage battery module and is used for detecting the voltage value of the direct current bus and the state information of each storage battery in real time;
the analysis control module is connected with the on-line monitoring module and is used for presetting the required voltage of the direct current bus, analyzing the difference data of the current voltage value and the required voltage of the direct current bus, calculating the time required by the stable voltage of each storage battery according to the difference data and the state information of each storage battery, selecting the storage battery combination mode with the shortest time and generating a corresponding control instruction;
and the standby voltage stabilizing module is connected with the analysis control module and the storage battery module and is used for controlling the actions of supplying or absorbing electric energy for the direct current bus by each storage battery according to the corresponding control instruction.
The principle of the above embodiment is: the battery module divides a number of batteries into a number of battery packs in equal amounts, which are used to supply or absorb electrical energy for the dc bus. The on-line monitoring module is connected with the direct current bus and the storage battery module and is used for detecting the voltage value of the direct current bus and the state information of each storage battery in real time. The analysis control module is connected with the on-line monitoring module, presets the required voltage of the direct current bus, and analyzes the difference data of the current voltage value and the required voltage of the direct current bus. According to the difference data and the current state information of each storage battery, the analysis control module calculates the time required by the stable voltage of each storage battery, and selects the storage battery combination mode with the shortest time to generate a corresponding control instruction. The standby voltage stabilizing module is connected with the analysis control module and the storage battery module, and controls the action of supplying or absorbing electric energy for the direct current buses by each storage battery according to the storage battery corresponding to the control instruction. The system can realize stable control of the voltage of the direct current bus by dynamically adjusting the power supply and absorption states of the storage battery.
The beneficial effects of the embodiment are as follows: the on-line monitoring module and the standby voltage stabilizing module can be in a hot standby state when the voltage of the direct current bus is normal, do not output to the direct current bus, and stabilize the voltage of the direct current bus through the charge and discharge actions of the storage battery when the voltage of the direct current bus is abnormal, so that the functions of autonomous operation and hot standby are realized.
To further optimize the above embodiment, referring to fig. 1, the battery module includes:
the dividing unit is used for obtaining the quantity of the storage batteries and equally dividing the quantity into a plurality of storage battery groups; each storage battery pack operates independently;
and the numbering unit is connected with the dividing unit and is used for setting an independent number for each storage battery pack according to the dividing result.
It should be noted that, by equally dividing the storage batteries into a plurality of groups, the system has higher flexibility; each storage battery pack can independently operate, which means that the system can selectively start, stop or replace the storage battery pack according to actual requirements, so that different scenes and loads can be better adapted; dividing the storage batteries into a plurality of groups enables the system to have higher reliability; even if one storage battery pack fails or fails, other storage battery packs can still work continuously, so that continuous power supply of a direct current power supply is ensured, and whole system faults caused by single component faults are avoided; by providing each battery pack with an independent number, each pack can be conveniently identified and managed; the presence of the number can help track and monitor important information such as status, capacity, life of each battery pack, and the like, and provide convenience in maintenance and management.
To further optimize the above embodiment, referring to fig. 1, the online monitoring module includes:
the voltage detection unit is connected with the direct current bus and used for detecting current voltage data of the direct current bus in real time;
the capacity detection unit is connected with each storage battery pack and the numbering unit and is used for detecting the current capacity value of each storage battery pack in real time and correspondingly inserting the number of each storage battery pack into the detected capacity value to generate current capacity data;
the discharge rate detection unit is connected with the storage battery pack and the numbering unit and is used for obtaining the limit discharge rate of each storage battery pack and inserting the corresponding number into the generated discharge rate data;
the charging rate detection unit is connected with the storage battery pack and the numbering unit and is used for acquiring the limit charging rate of each storage battery pack and inserting the corresponding number into the generated charging rate data;
and the load detection unit is connected with the storage battery pack and the numbering unit and is used for acquiring the current generated by the current internal resistance of each storage battery pack and inserting the corresponding number into the generated load current data I.
It should be noted that, the detection principle of each detection unit is a prior art means, and is not described; the load detection unit further includes: the load detection unit is connected with the standby voltage stabilizing module and is used for obtaining current generated by the internal resistor of the standby voltage stabilizing module and generating load current data II;
the embodiment realizes the real-time monitoring of the direct current bus, and simultaneously can acquire the key data of the direct current bus and the storage battery pack in real time and discover the abnormal storage battery pack in time.
To further optimize the above embodiments, referring to fig. 1, the analysis control module includes:
the voltage presetting unit is used for presetting a required voltage which is a voltage range which needs to be reached under the condition that the direct current bus is stable;
the voltage analysis unit is connected with the voltage detection unit and is used for judging whether the current voltage data is in the range of the preset required voltage or not; calculating difference data of the current voltage data when the current voltage data exceeds or falls below a range of a preset required voltage; the difference value data DeltaV is the absolute value of the difference between the current voltage data V0 and the preset demand voltage V1;
the first stable time calculation unit is connected with the voltage analysis unit, the capacity detection unit, the discharge rate detection unit and the load detection unit and is used for substituting the difference value data DeltaV, the current capacity data, the discharge rate data and the load current data of each storage battery into the first time calculation model respectively when the current voltage data is lower than the range of the preset required voltage, and calculating to obtain the first time data required by each storage battery for stabilizing the direct current bus;
the second stable time calculation unit is connected with the capacity detection unit, the discharge rate detection unit and the load detection unit, and is used for substituting the difference value data DeltaV, the current capacity data, the charge rate data and the load current data of each storage battery into the second time calculation model respectively when the current voltage data exceeds the range of the preset required voltage, and obtaining the second time data required by each storage battery for stabilizing the direct current bus through calculation;
the sorting unit is connected with the first stable time calculation unit and the second stable time calculation unit, sorts the first time data and generates a first sorting set; sorting the second time data to generate a second sorting set;
the scheme selection unit is connected with the sequencing unit and is used for selecting a storage battery pack corresponding to time data one with the shortest time consumption in the sequencing set as a stable scheme when the current voltage data is lower than the range of the preset required voltage; when the current voltage data exceeds the range of the preset demand voltage, selecting a storage battery pack corresponding to time data II with the shortest time consumption in the second sequencing set as a stabilizing scheme, and generating a corresponding control instruction; the stabilization scheme includes the number of the selected battery pack and corresponding time data.
It should be noted that the first time calculation model and the second time calculation model include:
time calculation model one is t1= (c×Δv)/(id×io);
t1 is time data one which is required by the storage battery pack to enable the direct current bus to reach stability, and the unit is seconds; c is the current capacity data of the storage battery pack, and the unit is ampere-hour; id is discharge rate data in amperes; io is load current data two, in amperes;
time calculation model two Is t2= (c×Δv)/(ic×is);
t2 is time data two which are required by the storage battery pack to enable the direct current bus to reach stability, and the unit is second; c is the current capacity data of the storage battery pack, and the unit is ampere-hour; ic is the charging rate data, and the unit is amperes; is load current data one, in amperes;
in the embodiment, the range of the preset required voltage is 87.5% -100% of the standard voltage of the direct current bus, and the standard voltage of the direct current bus is set according to the actual condition of the transformer substation; accurately calculating the time required by each storage battery for stabilizing the bus through the detected data, and selecting the storage battery with the shortest time as a stabilizing scheme; the embodiment can accurately acquire the running state of the storage battery pack so as to meet the stabilizing requirement of the voltage of the direct current bus and realize the direct current bus stabilization at the fastest speed.
To further optimize the above embodiment, referring to fig. 1, the scheme selecting unit further includes:
selecting a storage battery pack corresponding to a plurality of time data with shorter time consumption in the first sorting set or the second sorting set for combination, calculating time data three required by stabilizing the direct current bus after combination, substituting the time data three into the first sorting set or the second sorting set correspondingly, re-selecting the storage battery pack corresponding to the time data with the shortest time consumption in the first sorting set or the second sorting set as a stabilizing scheme, and generating a corresponding control instruction;
when the current voltage data is lower than the range of the preset demand voltage, time data III
Wherein n is the preset number of the storage battery packs in the storage battery pack combination,is the sum of the current capacity data of the storage battery packs of the preset quantity,/-or->The sum of the discharge rate data of each storage battery pack with the preset quantity is obtained, and Io is load current data II;
when the current voltage data exceeds the range of the preset demand voltage, the time data III
Wherein n is the preset number of the storage battery packs in the storage battery pack combination,is the sum of the current capacity data of the storage battery packs of the preset quantity,/-or->Is the sum of the respective charge rate data of the preset number of storage battery packs,/->Is the sum of the load current data of each storage battery pack of a preset number.
It should be noted that, in this embodiment, the plurality of storage battery packs with shorter stabilizing time are operated simultaneously to stabilize the bus, and the combined stabilizing time is accurately calculated by adding the battery capacity, the rate and the load current; the operation of the storage battery pack is dynamically adjusted, and the time required for stabilizing the bus is reduced;
in some embodiments, the historical voltage stabilizing data can be used for training each model, and the obtained model is more in line with the calculation model of each transformer substation.
To further optimize the above embodiment, referring to fig. 1, the standby voltage stabilizing module includes:
the instruction analysis unit is connected with the scheme selection unit and is used for receiving the control instruction and restoring the number in the stable scheme according to the control instruction;
one end of the rectifying and voltage stabilizing unit is connected with the direct current bus through a first circuit, and the other end of the rectifying and voltage stabilizing unit is connected with each storage battery pack through a second circuit; the rectification voltage stabilizing unit is used for controlling the communication state of the first circuit and the second circuit;
the control unit is connected with the instruction analysis unit and the rectification voltage stabilizing unit, and is used for connecting the positive electrode of the direct current bus with the positive electrode of the storage battery pack with the corresponding number in the control instruction through the rectification voltage stabilizing unit when the current voltage data is lower than the range of the preset required voltage, connecting the negative electrode of the direct current bus with the negative electrode of the storage battery pack with the corresponding number in the control instruction, discharging the storage battery pack, and providing electric energy for the direct current bus to increase the voltage; starting timing after connection is completed, and disconnecting the connection relation between the storage battery pack and the direct current bus through the rectification voltage stabilizing unit when the timing time reaches corresponding time data;
when the current voltage data exceeds the range of the preset required voltage, connecting the anode of the direct current bus with the cathode of the storage battery pack with the corresponding number in the control instruction through the rectification voltage stabilizing unit, connecting the cathode of the direct current bus with the anode of the storage battery pack with the corresponding number in the control instruction, charging the storage battery pack, and obtaining the electric energy reducing voltage from the direct current bus; and starting timing after connection is completed, and disconnecting the connection relation between the storage battery pack and the direct current bus through the rectification voltage stabilizing unit when the timing time reaches corresponding time data.
The switching mode of the rectifying and voltage stabilizing unit to the bus and the anode and the cathode of the storage battery can be realized by adopting a relay; the embodiment realizes the rapid reaction to the voltage stabilizing process, and realizes the charge and discharge actions of the storage battery by switching the connection relation of the anode and the cathode; the stable adjustment of the voltage of the direct current bus is effectively realized, and the stability and the reliability of the system are improved; the connection and disconnection of the storage battery are dynamically controlled, so that the electric energy is regulated, the voltage change can be responded quickly, stable power supply support is provided, and the capacity of quick recovery is realized. Therefore, unstable factors caused by voltage fluctuation in the running process of the equipment can be effectively reduced, and more reliable power supply is provided.
To further optimize the above embodiment, referring to fig. 1, the standby voltage stabilizing module further includes:
and the remote control unit is connected with the instruction analysis unit and is used for remotely transmitting the customized control instruction through the terminal equipment.
It should be noted that the presence of the remote control unit allows a user to remotely control the operation of the voltage stabilizing module through the terminal device (such as a computer, a mobile phone, etc.), without directly contacting the voltage stabilizing module. The user can customize the control instruction according to actual demands, including adjusting aspects such as selection, connection time, disconnection time and the like of the storage battery pack. The remote control has the advantage of increasing the operation flexibility and convenience of a user on the voltage stabilizing module. The user can remotely operate and adjust the working state of the voltage stabilizing module at any time through the remote control unit, and the requirement change of an actual scene is adapted. For example, when the voltage abnormality is detected, the user can remotely adjust the connection state of the storage battery in time, so that the voltage is quickly stabilized. In addition, the remote control unit can also help a user to remotely monitor the running state and the voltage condition of the voltage stabilizing module, timely acquire related data and alarm information, perform preventive and maintenance work in advance, and improve the efficiency and reliability of energy management.
To further optimize the above embodiment, please refer to fig. 1, further comprising:
and the safety protection module is connected with the storage battery module, the on-line monitoring module and the standby voltage stabilizing module and is used for performing power-off protection when the modules are over-temperature, fault and output voltage are lower than the normal operation allowable range.
The safety protection module is realized by using over-temperature overvoltage power-off equipment, so that each module has the functions of output impact resistance, output overload and output short circuit current limiting.
It should be noted that, in the system provided in the foregoing embodiment, only the division of the foregoing functional modules is illustrated, in practical application, the foregoing functional allocation may be performed by different functional modules, that is, the modules or steps in the embodiment of the present invention are further decomposed or combined, for example, the modules in the foregoing embodiment may be combined into one module, or may be further split into multiple sub-modules, so as to complete all or part of the functions described above. The names of the modules and steps related to the embodiments of the present invention are merely for distinguishing the respective modules or steps, and are not to be construed as unduly limiting the present invention.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus/apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus/apparatus.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the appended claims and their equivalents, the present invention is intended to include such modifications and variations as would be included in the above description of the disclosed embodiments, enabling those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A hot standby control system for a direct current power supply of a transformer substation, comprising:
the storage battery pack module divides the storage batteries into storage battery packs in equal quantity and is used for supplying or absorbing electric energy for the direct current bus;
the on-line monitoring module is connected with the direct current bus and the storage battery pack module and is used for detecting the voltage value of the direct current bus and the state information of each storage battery pack in real time;
the analysis control module is connected with the on-line monitoring module and is used for presetting the required voltage of the direct current bus, analyzing the difference data of the current voltage value and the required voltage of the direct current bus, calculating the time required by the stable voltage of each storage battery according to the difference data and the state information of each storage battery, selecting the storage battery combination mode with the shortest time and generating a corresponding control instruction;
and the standby voltage stabilizing module is connected with the analysis control module and the storage battery pack module and is used for controlling the actions of supplying or absorbing electric energy for the direct current bus by each storage battery pack according to the corresponding control instruction.
2. The hot standby control system of a substation direct current power supply according to claim 1, wherein the battery module comprises:
the dividing unit is used for obtaining the quantity of the storage batteries and equally dividing the quantity of the storage batteries into a plurality of storage battery packs; each storage battery pack independently operates;
and the numbering unit is connected with the dividing unit and is used for setting an independent number for each storage battery pack according to the dividing result.
3. The hot standby control system of a substation direct current power supply according to claim 2, wherein the on-line monitoring module comprises:
the voltage detection unit is connected with the direct current bus and used for detecting current voltage data of the direct current bus in real time;
the capacity detection unit is connected with each storage battery pack and the numbering unit and is used for detecting the current capacity value of each storage battery pack in real time and correspondingly inserting the number of each storage battery pack into the detected capacity value to generate current capacity data;
the discharge rate detection unit is connected with the storage battery pack and the numbering unit and is used for obtaining the rated discharge rate of each storage battery pack and inserting the corresponding number to generate discharge rate data;
the charging rate detection unit is connected with the storage battery pack and the numbering unit and is used for obtaining the limit charging rate of each storage battery pack and inserting corresponding numbers into the corresponding storage battery pack to generate charging rate data;
and the load detection unit is connected with the storage battery pack and the numbering unit and is used for acquiring the current generated by the current internal resistance of each storage battery pack and inserting the corresponding number into the generated load current data I.
4. A hot standby control system for a direct current power supply of a substation according to claim 3, wherein the load detection unit further comprises:
the load detection unit is connected with the standby voltage stabilizing module and is used for obtaining current generated by the internal resistor of the standby voltage stabilizing module and generating load current data II.
5. The hot standby control system of a substation direct current power supply according to claim 4, wherein the analysis control module comprises:
the voltage preset unit is used for presetting a required voltage which is a voltage range which needs to be reached under the condition that the direct current bus is stable;
the voltage analysis unit is connected with the voltage detection unit and is used for judging whether the current voltage data is in the range of the preset required voltage or not; calculating difference data of the current voltage data when the current voltage data exceeds or falls below the range of the preset required voltage; the difference data DeltaV is the absolute value of the difference between the current voltage data V0 and the preset demand voltage V1;
a first stable time calculation unit, connected to the voltage analysis unit and the capacity detection unit, the discharge rate detection unit and the load detection unit, and configured to respectively substitute, when the current voltage data is lower than the range of the preset required voltage, the difference data Δv, the current capacity data, the discharge rate data and the load current data of each storage battery pack into a first time calculation model, and obtain, through calculation, time data first required by each storage battery pack to enable the dc bus to reach stability;
a second stable time calculation unit, where the voltage analysis unit is connected to the capacity detection unit, the discharge rate detection unit, and the load detection unit, and is configured to, when the current voltage data exceeds the range of the preset required voltage, respectively substitute the difference data Δv, the current capacity data, the charge rate data, and the load current data of each storage battery into a second time calculation model, and obtain, through calculation, second time data required by each storage battery to enable the dc bus to reach stability;
the sorting unit is connected with the first stable time calculation unit and the second stable time calculation unit, sorts the first time data and generates a first sorting set; sorting the second time data to generate a second sorting set;
the scheme selection unit is connected with the sequencing unit and is used for selecting the storage battery pack corresponding to the time data one with the shortest time consumption in the sequencing set as a stable scheme when the current voltage data is lower than the range of the preset required voltage; when the current voltage data exceeds the range of the preset required voltage, selecting the storage battery pack corresponding to the time data II with the shortest time consumption in the second sorting set as a stabilizing scheme, and generating a corresponding control instruction; the stabilization scheme includes the number of the battery pack selected and corresponding time data.
6. The hot standby control system of a dc power supply for a substation according to claim 5, wherein the first time calculation model and the second time calculation model comprise:
the time calculation model one is t1= (c×Δv)/(id×io);
t1 is time data one which is required by the storage battery pack to enable the direct current bus to reach stability, and the unit is seconds; c is the current capacity data of the storage battery pack, and the unit is ampere-hour; id is discharge rate data in amperes; io is load current data two, in amperes;
the second time calculation model Is t2= (c×Δv)/(ic×is);
t2 is time data two which are required by the storage battery pack to enable the direct current bus to reach stability, and the unit is second; c is the current capacity data of the storage battery pack, and the unit is ampere-hour; ic is the charging rate data, and the unit is amperes; is load current data one in amperes.
7. The hot standby control system of a direct current power supply of a transformer substation according to claim 6, wherein the scheme selecting unit further comprises:
selecting and combining the storage battery packs corresponding to a plurality of time data with shorter time consumption in the first sorting set or the second sorting set, calculating time data three required by stabilizing the direct current bus after the combination, substituting the time data three into the first sorting set or the second sorting set correspondingly, re-selecting the storage battery pack corresponding to the time data with the shortest time consumption in the first sorting set or the second sorting set as a stabilizing scheme, and generating a corresponding control instruction;
when the current voltage data is lower than the range of the preset required voltage, the time data III
Wherein n is the preset number of the storage battery packs in the storage battery pack combination,is the sum of the current capacity data of the storage battery packs of the preset quantity,/-or->The sum of the discharge rate data of each storage battery pack with the preset quantity is obtained, and Io is load current data II;
when the current voltage data exceeds the range of the preset required voltage, the time data III
Wherein n is the preset number of the storage battery packs in the storage battery pack combination,is the sum of the current capacity data of the storage battery packs of the preset quantity,/-or->Is the sum of the respective charge rate data of the preset number of storage battery packs,/->Is the sum of the load current data of each storage battery pack of a preset number.
8. The hot standby control system of a substation dc power supply according to claim 7, wherein the standby voltage stabilizing module comprises:
the instruction analysis unit is connected with the scheme selection unit and is used for receiving a control instruction and restoring the number in the stable scheme according to the control instruction;
one end of the rectifying and voltage stabilizing unit is connected with the direct current bus through a first circuit, and the other end of the rectifying and voltage stabilizing unit is connected with each storage battery pack through a second circuit; the rectification voltage stabilizing unit is used for controlling the communication state of the first circuit and the second circuit;
the control unit is connected with the instruction analysis unit and the rectification voltage stabilizing unit and is used for connecting the positive electrode of the direct current bus with the positive electrode of the storage battery pack with the corresponding number in the control instruction through the rectification voltage stabilizing unit when the current voltage data is lower than the range of the preset required voltage, connecting the negative electrode of the direct current bus with the negative electrode of the storage battery pack with the corresponding number in the control instruction, discharging the storage battery pack, and providing electric energy for the direct current bus to increase the voltage; starting timing after connection is completed, and disconnecting the connection relation between the storage battery pack and the direct current bus through the rectification voltage stabilizing unit when the timing time reaches corresponding time data;
when the current voltage data exceeds the range of the preset required voltage, connecting the positive electrode of the direct current bus with the negative electrode of the storage battery pack with the corresponding number in the control instruction through the rectification voltage stabilizing unit, connecting the negative electrode of the direct current bus with the positive electrode of the storage battery pack with the corresponding number in the control instruction, charging the storage battery pack, and obtaining the electric energy reducing voltage from the direct current bus; and starting timing after connection is completed, and disconnecting the connection relation between the storage battery pack and the direct current bus through the rectification voltage stabilizing unit when the timing time reaches corresponding time data.
9. The hot standby control system of a substation dc power supply according to claim 8, wherein the standby voltage regulator module further comprises:
and the remote control unit is connected with the instruction analysis unit and is used for remotely transmitting the customized control instruction through the terminal equipment.
10. The substation direct current power supply hot standby control system according to claim 9, further comprising:
and the safety protection module is connected with the storage battery module, the on-line monitoring module and the standby voltage stabilizing module and is used for performing power-off protection when each module has over-temperature, faults and output voltage lower than a normal operation allowable range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311428468.6A CN117713330A (en) | 2023-10-30 | 2023-10-30 | Hot standby control system of direct-current power supply of transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311428468.6A CN117713330A (en) | 2023-10-30 | 2023-10-30 | Hot standby control system of direct-current power supply of transformer substation |
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| Publication Number | Publication Date |
|---|---|
| CN117713330A true CN117713330A (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311428468.6A Pending CN117713330A (en) | 2023-10-30 | 2023-10-30 | Hot standby control system of direct-current power supply of transformer substation |
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| Country | Link |
|---|---|
| CN (1) | CN117713330A (en) |
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2023
- 2023-10-30 CN CN202311428468.6A patent/CN117713330A/en active Pending
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