CN212210506U - Load balancing equipment and power supply system - Google Patents
Load balancing equipment and power supply system Download PDFInfo
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- CN212210506U CN212210506U CN202021092612.5U CN202021092612U CN212210506U CN 212210506 U CN212210506 U CN 212210506U CN 202021092612 U CN202021092612 U CN 202021092612U CN 212210506 U CN212210506 U CN 212210506U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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Abstract
The utility model relates to a load power supply technical field discloses a load balancing equipment and power supply system. In the load balancing device, the purpose of dynamically adjusting the load power of the load balancing device can be achieved by controlling the starting/stopping of a partial load starting and stopping module in a load adjusting unit, so that a short-time load power sudden adding process is converted into a time-adjustable total load power slow adding process and/or a short-time load power sudden unloading process is converted into a time-adjustable total load power slow unloading process, the influence of load impact on the power supply device when the load power is suddenly added or suddenly unloaded is relieved, the load response index of the power supply device can be greatly reduced after the load balancing device is adapted in a power supply system, the selection range of the power supply device is expanded, the selection difficulty is reduced, the power supply devices with different load response characteristics are conveniently replaced, and the actual production requirements are easily met.
Description
Technical Field
The utility model belongs to the technical field of the load power supply, specifically relate to a load balancing equipment and power supply system.
Background
In a power supply system in a scene such as oil and gas drilling, power matching between power supply equipment and load equipment within a certain range is required, when the load equipment is suddenly increased to be started or suddenly removed to be stopped, certain load impact can be generated on the power supply equipment, and if the load response characteristic of the power supply equipment is insufficient or the characteristic consistency among multiple generator sets is poor, disconnection and disconnection of the grid-connected generator sets can be caused, so that the load equipment cannot normally operate. Taking a power supply scene of the drilling equipment as an example, when the load of the drilling equipment (namely the motor) is suddenly added or suddenly removed, the generated load impact can be directly transmitted to the generator set serving as power supply equipment, so that the protection of a small power grid formed by grid-connected generator sets is disconnected, and the motor cannot normally work.
Therefore, the existing power supply system has higher index requirements on the load response characteristics of the power supply equipment, and the power supply equipment is generally constructed by adopting a fuel generator set with a quick response index (aiming at a gas generator set, the quick response requirement is difficult to meet because of slow response), so that the selection range of the power supply equipment is limited, the selection difficulty is high, and the actual production requirements are difficult to meet.
SUMMERY OF THE UTILITY MODEL
In order to solve in current power supply system, because of there is the limited and big problem of the selection degree of difficulty of higher index requirement and the selection scope that leads to power supply unit's load response characteristic, the utility model aims to provide a load balancing equipment and power supply system for the adaptation in power supply system can alleviate the load and strike the influence to power supply unit, and then in power supply system, can reduce the load response index to power supply unit by a wide margin, extend power supply unit's selection scope, reduce the selection degree of difficulty, conveniently change the power supply unit who has different load response characteristics, easily satisfy actual production demand.
The utility model discloses the technical scheme that the first aspect adopted does:
a load balancing device comprises a load power acquisition unit, a load change receiving unit, a load adjusting unit and a control unit, wherein the load power acquisition unit is arranged on a transmission bus between power supply equipment and load equipment, the load change receiving unit is arranged on the load equipment, and the load adjusting unit comprises a plurality of load start-stop modules which are electrically connected with the transmission bus;
the power signal input end of the control unit is electrically connected with the output end of the load power acquisition unit, the time sequence signal input end of the control unit is electrically connected with the output end of the load change receiving unit, and the start-stop signal output end of the control unit is electrically connected with the controlled end of each load start-stop module respectively.
Based on the above-mentioned utility model content, can open the start/stop of opening the module through the partial load in the control load regulation unit, can realize dynamic adjustment the load power purpose of load balancing equipment to load power with the short time suddenly add the process turn into long adjustable total load power slowly add the process and/or suddenly unload the process turn into long adjustable total load power slowly unload the process with the load power of short time suddenly, thereby alleviate when load power suddenly adds or suddenly unloads, the impact of produced load impact to power supply unit, make with load balancing equipment adaptation back in power supply system can reduce the load response index to power supply unit by a wide margin, extends power supply unit's selection scope, reduces the selection degree of difficulty, conveniently changes the power supply unit that has different load response characteristics, easily satisfies actual production demand.
In one possible design, the load power acquisition unit comprises a bus current transformer, a bus voltage transformer and a power measurement module, wherein the bus current transformer and the bus voltage transformer are respectively sleeved on the transmission bus;
the output end of the bus current transformer is electrically connected with the current signal input end of the power measurement module, the output end of the bus voltage transformer is electrically connected with the voltage signal input end of the power measurement module, and the analog signal output end of the power measurement module is electrically connected with the power signal input end of the control unit.
In one possible design, the switching value signal output end of the load change receiving unit is electrically connected with the timing signal input end of the control unit.
In one possible design, the load start-stop module is a series branch comprising an alternating current contactor and a load device, wherein the series branch is electrically connected with the transmission bus;
and the controlled end of the alternating current contactor is electrically connected with the switching value output end of the control unit and used as the starting and stopping signal output end.
In one possible design, the load device employs a load resistor or a super capacitor.
In one possible design, the control unit employs a programmable logic controller.
In one possible design, the system further comprises a human-computer interaction unit, wherein the human-computer interaction unit is in communication connection with the control unit.
The utility model discloses the technical scheme that the second aspect adopted does:
a power supply system comprising a power supply device, a transmission bus, a load device and a load balancing device as described in the first aspect or any one of the possible designs in the first aspect, wherein the power supply device is electrically connected to the load device via the transmission bus;
in the load balancing equipment, a load power acquisition unit is arranged on the transmission bus, a load change receiving unit is arranged on the load equipment, and a load start-stop module is electrically connected with the transmission bus.
In one possible design, the power supply device includes an outlet cabinet and a plurality of generator sets electrically connected to the outlet cabinet in a grid-connected manner, the load device includes a switch cabinet and a plurality of motors electrically connected to the switch cabinet, respectively, wherein the outlet cabinet is electrically connected to the switch cabinet through the transmission bus, and the load change receiving unit is disposed in the switch cabinet.
In one possible design, the load device comprises an impact load type device.
The utility model has the advantages that:
(1) the invention provides a load balancing device and a power supply system which are adapted in a power supply system, namely in the load balancing device, the load power of the load balancing device can be dynamically adjusted by controlling the starting/stopping of a part of load starting and stopping modules in a load adjusting unit, so as to convert a short-time load power sudden adding process into a time-adjustable total load power slow adding process and/or convert a short-time load power sudden unloading process into a time-adjustable total load power slow unloading process, thereby relieving the influence of load impact on power supply equipment when the load power is suddenly added or suddenly unloaded, greatly reducing the load response index to the power supply equipment after the load balancing device is adapted in the power supply system, expanding the selection range of the power supply equipment, reducing the selection difficulty and facilitating the replacement of the power supply equipment with different load response characteristics, easily meet the actual production requirement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the load balancing apparatus provided by the present invention.
Fig. 2 is an exemplary diagram of a load balancing apparatus provided by the present invention for alleviating all load impacts during sudden load loading and sudden load unloading.
Fig. 3 is an exemplary diagram of a load balancing apparatus for alleviating partial load impact during sudden load loading and sudden load unloading.
Fig. 4 is a schematic structural diagram of a first power supply system including a load balancing device according to the present invention.
Fig. 5 is a schematic structural diagram of a second power supply system including a load balancing device according to the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. The present invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.
It should be understood that, for the term "and/or" as may appear herein, it is merely an associative relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, B exists alone, and A and B exist at the same time; for the term "/and" as may appear herein, which describes another associative object relationship, it means that two relationships may exist, e.g., a/and B, may mean: a exists independently, and A and B exist independently; in addition, for the character "/" that may appear herein, it generally means that the former and latter associated objects are in an "or" relationship.
It will be understood that when an element is referred to herein as being "connected," "connected," or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. Conversely, if a unit is referred to herein as being "directly connected" or "directly coupled" to another unit, it is intended that no intervening units are present. In addition, other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between … …" versus "directly between … …", "adjacent" versus "directly adjacent", etc.).
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof.
It should also be noted that, in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed substantially concurrently, or the figures may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
It should be understood that specific details are provided in the following description to facilitate a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. For example, systems may be shown in block diagrams in order not to obscure the examples in unnecessary detail. In other instances, well-known processes, structures and techniques may be shown without unnecessary detail in order to avoid obscuring example embodiments.
Example one
As shown in fig. 1 to 3, the load balancing device provided in this embodiment includes a load power acquisition unit, a load change receiving unit, a load adjusting unit and a control unit, where the load power acquisition unit is configured to be arranged on a transmission bus located between a power supply device and a load device, the load change receiving unit is configured to be arranged on the load device, and the load adjusting unit includes a plurality of load start-stop modules electrically connected to the transmission bus; the power signal input end of the control unit is electrically connected with the output end of the load power acquisition unit, the time sequence signal input end of the control unit is electrically connected with the output end of the load change receiving unit, and the start-stop signal output end of the control unit is electrically connected with the controlled end of each load start-stop module respectively.
As shown in fig. 1, in a specific structure of the load balancing device, the load power collecting unit is configured to collect load power information (which may be power information of the load device, or total power information of the load device and the load adjusting unit) in real time, and transmit the load power information to the control unit. Specifically, as shown in fig. 1, the load power acquisition unit includes a bus current transformer, a bus voltage transformer and a power measurement module, wherein the bus current transformer and the bus voltage transformer are respectively sleeved on the transmission bus; the output end of the bus current transformer is electrically connected with the current signal input end of the power measurement module, the output end of the bus voltage transformer is electrically connected with the voltage signal input end of the power measurement module, and the analog signal output end of the power measurement module is electrically connected with the power signal input end of the control unit. In the specific structure of the load power acquisition unit, the bus current transformer is used for acquiring a current signal reflecting the magnitude of bus current in real time and transmitting the current signal to the power measurement module, and the current signal can be realized by adopting the existing current transformer model; the bus voltage transformer is used for acquiring a voltage signal reflecting the bus voltage in real time and transmitting the voltage signal to the power measurement module; the power measurement module is used for calculating and obtaining the load power information in real time according to the current signal and the voltage signal, the existing standard power measurement module can be adopted, and the load power information is converted into a current signal of 4-20 mA to be transmitted to the control unit, so that signal delay of a communication mode is avoided through an analog signal transmission mode, and the control unit is ensured to generate control action responding to real-time power change in time. In addition, the power measurement module can also directly transmit the collected load power information in a communication bus mode.
The load change receiving unit is configured to receive a timing signal reflecting a load power change of the load device, for example, receive the corresponding timing signal within a certain time before a load power is suddenly added or unloaded. Specifically, the timing signal is preferably a switching value signal, that is, a switching value signal output end of the load change receiving unit is electrically connected to a timing signal input end of the control unit.
The load adjusting unit is configured to dynamically adjust the load power of the load balancing device by enabling/disabling a part of the load start-stop modules under the control of the control unit (that is, if a single load start-stop module is enabled, the unit load power is increased, and if a single load start-stop module is disabled, the unit load power is decreased), so that load transfer can be performed with the load device, and the total load power is kept to be matched with the output power of the power supply device within a certain range. In a specific structure of the load adjusting unit, the more the number of the load start-stop modules is, the larger the power which can be transferred by the load is; the smaller the unit load power of the load start-stop module is, the finer the unit power of load transfer is. Specifically, as shown in fig. 1, the load start-stop module is a series branch including an ac contactor and a load device, wherein the series branch is electrically connected to the transmission bus; and the controlled end of the alternating current contactor is electrically connected with the switching value output end of the control unit and used as the starting and stopping signal output end. The load devices are used for increasing the load power of the load balancing equipment when the corresponding alternating current contactor is switched on, and reducing the load power of the load balancing equipment when the corresponding alternating current contactor is switched off, so that the purpose of starting/stopping the corresponding load devices can be achieved through the control unit for controlling the switches of the alternating current contactors. In detail, the load device may be, but not limited to, a load resistor or a super capacitor, and the like, wherein when the super capacitor is used, the super capacitor may store electric energy when being activated and discharge electric energy when being deactivated by using the characteristic that the super capacitor can be rapidly charged and discharged, thereby avoiding electric energy waste and ensuring economic benefits.
The control unit is used as the core of the load balancing device, controls the activation/deactivation of a partial load start-stop module in the load adjusting unit based on a conventional control program according to the time sequence signal and the real-time load power information, and achieves the purpose of dynamically adjusting the load power of the load balancing device, so as to convert a short-time load power sudden-adding process into a time-adjustable total load power slow-adding process and/or convert a short-time load power sudden-unloading process into a time-adjustable total load power slow-unloading process, thereby relieving the influence of load impact on the power supply device when the load power is suddenly added or suddenly unloaded, greatly reducing the load response index to the power supply device after the load balancing device is adapted in a power supply system, expanding the selection range of the power supply device, and reducing the selection difficulty, the power supply equipment with different load response characteristics is convenient to replace, and the actual production requirements are easy to meet. Specifically, the control unit may be implemented by, but not limited to, an existing programmable logic controller. In addition, the load balancing equipment further comprises a human-computer interaction unit, wherein the human-computer interaction unit is in communication connection with the control unit, so that human-computer interaction with users can be facilitated by configuring the human-computer interaction unit, the purpose of flexibly setting working parameters such as starting speed, load power sudden-adding target value, stopping speed and load power sudden-unloading target value is achieved, and practical application is facilitated; the human-computer interaction unit preferably adopts a touch screen.
The working principle of the load balancing device will be described in detail below by taking the example of adapting the load balancing device to a power supply system of a drilling device, as shown in fig. 2.
(1) Total load power ramp-up procedure (i.e., period T1 in fig. 2): after the control unit receives the time sequence signal for reflecting the sudden addition of the load power of the drilling equipment through the load change receiving unit, the control unit starts the load start-stop modules in the load adjusting unit one by one to slowly increase the load power of the load adjusting unit (the increase speed of the load start-stop modules can be adaptively adjusted according to the shock response characteristic of the power supply equipment) until the total load power reaches the target value of the sudden addition of the load power of the drilling equipment. Since the added speed is adjustable, the duration of the T1 time period is also adjustable, and the lower the demand on the shock response characteristics of the power supply device.
(2) Abrupt waiting process (i.e., period T2 in fig. 2): and the control unit enables the total load power to maintain the target value of the sudden load power addition of the drilling equipment by adjusting the load power of the load adjusting unit according to the load power signal acquired by the load power acquisition unit.
(3) Drilling equipment load power ramp-up procedure (i.e., period T3 in fig. 2): the control unit stops the load start-stop modules in the load adjusting unit one by one according to the load power signals acquired by the load power acquisition unit, so that the load power of the load adjusting unit is rapidly reduced (the reduction speed of the load power is matched with the sudden load power increase speed of the drilling equipment, and the total load power is maintained at the target value of the sudden load power increase of the drilling equipment) until the load power of the drilling equipment is suddenly increased to the target value, and at the moment, the load power of the load adjusting unit returns to the initial state.
(4) Drilling equipment load power smoothing process (i.e., period T4 in fig. 2): the control unit may receive a timing signal reflecting that the drilling equipment load power is to be suddenly discharged through the load change receiving unit. In addition, the control unit can also track the load power change in real time according to the load power signal acquired by the load power acquisition unit without concerning the time sequence signal.
(5) Drilling equipment load power dump process (i.e., period T5 in fig. 2): the control unit starts the load start-stop modules in the load adjusting unit one by one according to the load power signals acquired by the load power acquisition unit, so that the load power of the load adjusting unit is rapidly increased (the increase speed of the load power is matched with the load power dump speed of the drilling equipment, and the total load power is maintained at the pre-dump value of the load power of the drilling equipment) until the load power of the drilling equipment is dumped to the target value.
(6) Total load power ramp-down procedure (i.e., period T6 in fig. 2): the control unit deactivates the load start-stop modules in the load adjusting unit one by one, so that the load power of the load adjusting unit is slowly reduced (the reduction speed of the load power can be adaptively adjusted according to the shock response characteristic of the power supply equipment) until the total load power reaches the target value of the sudden unloading of the load power of the drilling equipment. Since the reduced speed is adjustable, the duration of the T6 time period is also adjustable, and the lower the demand on the shock response characteristics of the power supply device.
As shown in fig. 2, the duration of the T1 time period is significantly less than the T3 time period (the duration is constant and not adjustable at this time), so that the load power sudden-add process of a short time is converted into a total load power slow-add process with adjustable duration, and the duration of the T6 time period is significantly less than the T5 time period (the duration is constant and not adjustable at this time), so that the load power sudden-drop process of a short time is converted into a total load power slow-drop process with adjustable duration, thereby alleviating the influence of load impact on the power supply equipment when the load power of the drilling equipment is suddenly added or suddenly dropped, greatly reducing the load response index of the power supply system of the drilling equipment to the power supply equipment, expanding the selection range of the power supply equipment, reducing the selection difficulty, facilitating the replacement of the power supply equipment with different load response characteristics.
As shown in fig. 3, the load balancing device may also relieve all load impacts during load sudden-loading and sudden-unloading as shown in fig. 2, that is, on the premise that the power supply device has a higher load response index, partial load impacts during load sudden-loading and sudden-unloading may be relieved: (1) total load power ramp-up procedure (i.e., period T1 in fig. 3): the control unit starts the load start-stop modules in the load adjusting unit one by one, so that the load power of the load adjusting unit is slowly increased (the increasing speed of the load power can be adaptively adjusted according to the shock response characteristic of the power supply equipment) until the total load power reaches a part of target value (for example 65% of the original target) of the load power of the drilling equipment; (3) drilling equipment load power ramp-up procedure (i.e., period T3 in fig. 3): the control unit deactivates the load start-stop modules in the load adjusting unit one by one, so that the load power of the load adjusting unit is rapidly reduced (the reduction speed is 65% of the sudden increase speed of the load power of the drilling equipment, and the total load power is continuously and slowly increased to the target value of the sudden increase of the load power of the drilling equipment) until the load power of the drilling equipment is suddenly increased to the target value; (5) drilling equipment load power dump process (i.e., period T5 in fig. 3): the control unit starts the load start-stop modules in the load adjusting unit one by one, so that the load power of the load adjusting unit is increased rapidly (the increasing speed is 65% of the sudden unloading speed of the load power of the drilling equipment, and the total load power is reduced slowly) until the load power of the drilling equipment is suddenly unloaded to a target value; (6) total load power ramp-down procedure (i.e., period T6 in fig. 3): the control unit deactivates the load start-stop modules in the load adjusting unit one by one, so that the load power of the load adjusting unit is continuously and slowly reduced (the reduction speed of the load power can be adaptively adjusted according to the shock response characteristic of the power supply equipment) until the total load power reaches the target value of the sudden load discharge of the load power of the drilling equipment. By the method, the influence of load impact on the power supply equipment when the load power of the drilling equipment is suddenly increased or decreased can also be relieved to a certain extent.
In summary, the load balancing device provided by the embodiment has the following technical effects:
(1) the embodiment provides a load balancing device adapted in a power supply system, that is, by controlling the activation/deactivation of a partial load start/stop module in a load adjusting unit, the load power of the load balancing device can be dynamically adjusted, so as to convert a short-time load power sudden-load process into a total load power slow-load process with adjustable duration and/or convert a short-time load power sudden-load process into a total load power slow-load process with adjustable duration, thereby alleviating the influence of load impact on power supply equipment during load power sudden-load or sudden-load, so that after the load balancing device is adapted in the power supply system, the load response index to the power supply equipment can be greatly reduced, the selection range of the power supply equipment is expanded, the selection difficulty is reduced, and the power supply equipment with different load response characteristics is conveniently replaced, easily meet the actual production requirement.
Example two
As shown in fig. 4, this embodiment specifically proposes a power supply system applying the load balancing device on the basis of the technical solution of the first embodiment, that is, the power supply system includes a power supply device, a transmission bus, a load device, and the load balancing device according to the first embodiment, where the power supply device is electrically connected to the load device through the transmission bus; in the load balancing equipment, a load power acquisition unit is arranged on the transmission bus, a load change receiving unit is arranged on the load equipment, and a load start-stop module is electrically connected with the transmission bus. The power supply system may be exemplified as a power supply system for drilling equipment, wherein the power supply equipment includes an outlet cabinet and a plurality of generator sets electrically connected to the outlet cabinet in a grid-connected manner, the load equipment includes a switch cabinet and a plurality of motors (which may be directly electrically connected motors or indirectly electrically connected motors via a frequency converter driving circuit or the like) electrically connected to the switch cabinet, respectively, wherein the outlet cabinet is electrically connected to the switch cabinet via the transmission bus, and the load change receiving unit is disposed in the switch cabinet. Through the power supply system structure, the influence of impact load (namely sudden starting or unloading of the motor) on the generator set can be greatly reduced, the response requirement on sudden loading/sudden unloading of the generator set is greatly reduced, the model selection requirement on the generator set is further greatly reduced, and the maintenance cost of the generator set in actual application is reduced (namely the reliability and the service life can be improved after the impact load is greatly reduced).
For details and technical effects of the power supply system provided in this embodiment, reference may be made to embodiment one, and details are not described herein.
EXAMPLE III
As shown in fig. 5, on the basis of the technical solution of the first embodiment, the present embodiment specifically proposes another power supply system applying the load balancing device, that is, the power supply system includes a power supply device, a transmission bus, a load device, and the load balancing device according to the first embodiment, where the power supply device is electrically connected to the load device through the transmission bus; in the load balancing equipment, a load power acquisition unit is arranged on the transmission bus, a load change receiving unit is arranged on the load equipment, and a load start-stop module is electrically connected with the transmission bus. The power supply system is suitable for an application scene that the independent power supply equipment supplies power to the impact load, namely the load equipment comprises impact load type equipment (such as high-power electric equipment), so that the influence of the impact load on the independent power supply equipment can be greatly reduced, and when the independent power supply equipment is not enough to support the impact load for use, the normal operation of the power supply system is ensured, and the capacity requirement on the power supply system is reduced.
For details and technical effects of the power supply system provided in this embodiment, reference may be made to embodiment one, and details are not described herein.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: modifications of the technical solutions described in the embodiments or equivalent replacements of some technical features may still be made. Such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Finally, it should be noted that the present invention is not limited to the above-mentioned alternative embodiments, and that various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the following claims, and which can be used to interpret the claims.
Claims (10)
1. A load balancing device is characterized by comprising a load power acquisition unit, a load change receiving unit, a load adjusting unit and a control unit, wherein the load power acquisition unit is arranged on a transmission bus between power supply equipment and load equipment;
the power signal input end of the control unit is electrically connected with the output end of the load power acquisition unit, the time sequence signal input end of the control unit is electrically connected with the output end of the load change receiving unit, and the start-stop signal output end of the control unit is electrically connected with the controlled end of each load start-stop module respectively.
2. The load balancing device of claim 1, wherein the load power collecting unit comprises a bus current transformer, a bus voltage transformer and a power measuring module, wherein the bus current transformer and the bus voltage transformer are respectively sleeved on the transmission bus;
the output end of the bus current transformer is electrically connected with the current signal input end of the power measurement module, the output end of the bus voltage transformer is electrically connected with the voltage signal input end of the power measurement module, and the analog signal output end of the power measurement module is electrically connected with the power signal input end of the control unit.
3. The load balancing apparatus of claim 1, wherein the switching value signal output terminal of the load variation receiving unit is electrically connected to the timing signal input terminal of the control unit.
4. The load balancing apparatus of claim 1, wherein the load start/stop module is a series branch comprising an ac contactor and a load device, wherein the series branch is electrically connected to the transmission bus;
and the controlled end of the alternating current contactor is electrically connected with the switching value output end of the control unit and used as the starting and stopping signal output end.
5. The load balancing apparatus of claim 4, wherein the load devices employ a load resistor or a super capacitor.
6. The load balancing apparatus of claim 1, wherein the control unit employs a programmable logic controller.
7. The load balancing device of claim 1, further comprising a human-machine interaction unit, wherein the human-machine interaction unit is communicatively coupled to the control unit.
8. A power supply system, characterized by comprising a power supply device, a transmission bus, a load device and the load balancing device as claimed in any one of claims 1 to 7, wherein the power supply device is electrically connected with the load device through the transmission bus;
in the load balancing equipment, a load power acquisition unit is arranged on the transmission bus, a load change receiving unit is arranged on the load equipment, and a load start-stop module is electrically connected with the transmission bus.
9. The power supply system according to claim 8, wherein the power supply device includes an outlet cabinet and a plurality of generator sets electrically connected to the outlet cabinet in a grid-connected manner, the load device includes a switch cabinet and a plurality of motors electrically connected to the switch cabinet, respectively, wherein the outlet cabinet is electrically connected to the switch cabinet through the transmission bus, and the load variation receiving unit is disposed in the switch cabinet.
10. The power supply system of claim 8 wherein said load device comprises a shock load type device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021092612.5U CN212210506U (en) | 2020-06-12 | 2020-06-12 | Load balancing equipment and power supply system |
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| CN202021092612.5U CN212210506U (en) | 2020-06-12 | 2020-06-12 | Load balancing equipment and power supply system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471992A (en) * | 2021-05-23 | 2021-10-01 | 山东英信计算机技术有限公司 | Cabinet power supply method, system, equipment and medium |
| CN113922360A (en) * | 2021-09-07 | 2022-01-11 | 烟台杰瑞石油装备技术有限公司 | Fracturing well site power supply system |
-
2020
- 2020-06-12 CN CN202021092612.5U patent/CN212210506U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471992A (en) * | 2021-05-23 | 2021-10-01 | 山东英信计算机技术有限公司 | Cabinet power supply method, system, equipment and medium |
| CN113471992B (en) * | 2021-05-23 | 2024-02-09 | 山东英信计算机技术有限公司 | Cabinet power supply method, system, equipment and medium |
| CN113922360A (en) * | 2021-09-07 | 2022-01-11 | 烟台杰瑞石油装备技术有限公司 | Fracturing well site power supply system |
| CN113922360B (en) * | 2021-09-07 | 2023-08-18 | 烟台杰瑞石油装备技术有限公司 | Fracturing well site power supply system |
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