Power protection and supply system for important equipment

Abstract

The utility model relates to the technical field of electrical engineering, in particular to a safe power supply system for important equipment, which comprises a diesel generating set, a safe power supply control box and a plurality of safe power supplies. The power supply end of the guaranteed power supply is electrically connected with the input end of the guaranteed power supply control box, the output end of the guaranteed power supply control box is electrically connected with the power supply end of the guaranteed power supply load loop, and the communication end of the diesel generating set is electrically connected with the first communication end of the guaranteed power supply control box. The input end of the guaranteed power supply load loop is electrically connected with the second communication end of the guaranteed power supply control box, and the power supply end of the diesel generator set is electrically connected with a bus of the guaranteed power supply load loop; the guaranteed power supply control box is used for selectively controlling the diesel generating set or the guaranteed power supply to supply power to the guaranteed power supply load loop when receiving a power-off signal of the guaranteed power supply load loop; therefore, according to power-off requirements of important equipment, the diesel generator set or the power supply is flexibly configured for power supply, and normal operation of the important equipment after power-off is realized at low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical engineering, in particular to a power supply guarantee system for important equipment. Background Art

[0002] Diesel generators are one of the most important equipment in the power system, and are mainly used in important places. In emergency situations or accidental power outages, emergency diesel generator sets are used to quickly restore and extend power supply for a period of time. Therefore, the total capacity of diesel generator sets usually needs to be determined according to the type of building and its load type to ensure the normal operation of equipment that still needs to run when the power load is cut off, generally fire loads and some important equipment (or facilities); so in order to avoid waste caused by excessive total capacity design, the total capacity of diesel generator sets that just meets the power demand will be set at the beginning of the park construction.

[0003] However, in some industrial parks, after the later enterprises move in, if more advanced high-tech companies or medical equipment companies are introduced, some of their important equipment are not allowed to suddenly lose power; at this time, it is obvious that the capacity of the original diesel generator set cannot meet the power supply demand after the power outage in the park, and the power supply is too large, and the uninterruptible power supply cannot meet it. At this time, the only thing to do is to expand the capacity of the diesel generator set.

[0004] However, capacity expansion will lead to an increase in the area occupied by the diesel generator sets, which may cause the original diesel generator room to fail to meet the architectural design specifications. In addition, the companies stationed in the park may not remain unchanged for a long time. When the companies stationed in the park change, the capacity of the diesel generator sets may be too small or too large. More importantly, the cost of changing the matching method of the generator set capacity is too high and the construction difficulty is too great, which is not conducive to the operation of the park.

[0005] Therefore, how to design a power supply system that matches various power outages has become an urgent problem to be solved in the current field of electrical engineering technology. Utility Model Content

[0006] In view of the above-mentioned defects, the purpose of the utility model is to propose a power supply guarantee system for important equipment. According to the power outage requirements of the important equipment, diesel generator sets or power supply guarantee power supplies can be flexibly configured to achieve normal operation of the important equipment after power outage at a low cost.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] A power supply system for important equipment, comprising a diesel generator set, a power supply control box and a plurality of power supply sources; the power supply end of the power supply source is electrically connected to the input end of the power supply control box, the output end of the power supply control box is electrically connected to the power supply end of the power supply load circuit, the communication end of the diesel generator set is electrically connected to the first communication end of the power supply control box, the input end of the power supply load circuit is electrically connected to the second communication end of the power supply control box, and the power supply end of the diesel generator set is electrically connected to the busbar of the power supply load circuit;

[0009] The power supply control box is used to selectively control the diesel generator set or the power supply to supply power to the power supply load circuit when receiving a power-off signal of the power supply load circuit.

[0010] Further, the power supply for guaranteeing power supply is an energy storage power supply, other low-voltage power supply in the room and a mobile power supply; the power supply ends of the energy storage power supply, the other low-voltage power supply in the room and the mobile power supply are all used as the power supply ends of the power supply for guaranteeing power supply;

[0011] The power supply control box is used to control the energy storage power supply to supply power to the power supply load circuit when the power off signal received is less than the preset power off time; when the power off signal received is greater than or equal to the preset power off time, control the mobile power supply or the diesel generator set to supply power to the power supply load circuit; when the power supply load circuit is fault-powered off, control the other low-voltage room power supplies to supply power to the power supply load circuit.

[0012] Furthermore, the power supply control box includes a monitoring device, a power supply end switch, an isolating switch and a quick access socket; the first communication end and the second communication end of the monitoring device are respectively used as the first communication end and the second communication end of the power supply control box, the first incoming line end, the second incoming line end, the third incoming line end of the power supply end switch and the incoming line end of the quick access socket are all used as the input end of the power supply control box, the outgoing line end of the quick access socket is electrically connected to one end of the isolating switch, the first outgoing line end, the second outgoing line end, the third outgoing line end of the power supply end switch and the other end of the isolating switch are all connected to the busbar of the power supply control box, the busbar lead-out line of the power supply control box is used as the output end of the power supply control box, and the control end of the monitoring device is electrically connected to the control end of the power supply end switch;

[0013] The first incoming line terminal, the second incoming line terminal, the third incoming line terminal of the power supply end switch and the incoming line terminal of the quick access socket are respectively used to electrically connect to the power supply terminals of the diesel generator set, the energy storage power supply, the other low-voltage room power supplies and the mobile power supply.

[0014] Furthermore, the monitoring device is a synchronization device.

[0015] Furthermore, the power supply end switch is an all-in-one circuit breaker or a plurality of single-circuit circuit breakers;

[0016] When the power supply end switch is the single-circuit circuit breaker, the inlet end of the single-circuit circuit breaker is used as the first inlet end, the second inlet end or the third inlet end of the power supply end switch, and the outlet end of the single-circuit circuit breaker is used as the first outlet end, the second outlet end or the third outlet end of the power supply end switch;

[0017] When the power supply end switch is the multi-in-one circuit breaker, the incoming line end of the multi-in-one circuit breaker is respectively used as the first incoming line end, the second incoming line end and the third incoming line end of the power supply end switch, and the outgoing line end of the multi-in-one circuit breaker is used as the first outgoing line end, the second outgoing line end and the third outgoing line end of the power supply end switch.

[0018] Furthermore, the energy storage power supply includes an energy storage grid-connected cabinet and at least one energy storage group; the power supply end of the energy storage grid-connected cabinet is used as the power supply end of the energy storage power supply, and the power supply end of the energy storage grid-connected cabinet is electrically connected to the output end of the energy storage group.

[0019] Furthermore, the energy storage group includes an energy storage combiner box and at least one energy storage cabinet; the output end of the energy storage combiner box is used as the output end of the energy storage group, and the multiple input ends of the energy storage combiner box are respectively electrically connected to the output end of the energy storage cabinet.

[0020] Furthermore, the mobile power source is a diesel generator truck.

[0021] The technical solution provided by the utility model may include the following beneficial effects: a power supply control box and multiple power supply units are arranged in the industrial park to cooperate with a diesel generator set for power supply of important equipment in the park; the power supply control box centrally controls the diesel generator set and multiple power supply units, so that when a power failure occurs in the power supply load circuit, that is, when the incoming circuit breaker of the low-voltage cabinet group for power supplying important equipment connected to the mains power supply circuit is disconnected due to power failure (power failure signal), the power supply control box selectively controls the diesel generator set or the power supply unit to supply power to the power supply load circuit (power supply can be achieved by connecting the power supply end of the power supply to the output end of the low-voltage cabinet outgoing circuit breaker of the power supply load circuit through the power supply control box) ; There is no need to change the capacity of the diesel generator set. When the power supply load circuit is powered off, the power supply is selectively configured to maintain the power supply of the power supply load circuit to prevent important equipment from stopping operation, thereby achieving simple, fast and low-cost power supply for important equipment; and the type and quantity of power supply can be freely selected to flexibly respond to different power outages. For example: when the diesel generator set is not running at full load, the diesel generator set can supply power to important equipment through the busbar of the power supply load circuit, or when the diesel generator set is running at full load, one or more power supply can be selected to power important equipment, or as the power outage time increases, the power supply can be gradually incorporated into the power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the principle of a power supply system of an important device in one embodiment of the utility model.

[0023] Among them: diesel generator set 1, power supply control box 2, power supply 3, power supply load circuit 4, energy storage power supply 31, other low-voltage room power supply 32, mobile power supply 33, monitoring device 21, power supply end switch 22, isolation switch 23, quick access socket 24, energy storage grid cabinet 311, energy storage group 312, energy storage junction box 313, energy storage cabinet 314. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0027] Combine the following Figure 1 , describing a power supply system for an important device in an embodiment of the utility model.

[0028] A power supply system for important equipment, comprising a diesel generator set 1, a power supply control box 2 and a plurality of power supply sources 3; the power supply end of the power supply source 3 is electrically connected to the input end of the power supply control box 2, the output end of the power supply control box 2 is electrically connected to the power supply end of a power supply load circuit 4, the communication end of the diesel generator set 1 is electrically connected to the first communication end of the power supply control box 2, the input end of the power supply load circuit 4 is electrically connected to the second communication end of the power supply control box 2, and the power supply end of the diesel generator set 1 is electrically connected to the busbar of the power supply load circuit 4;

[0029] The power supply control box 2 is used to selectively control the diesel generator set 1 or the power supply 3 to supply power to the power supply load circuit 4 when receiving a power-off signal of the power supply load circuit 4 .

[0030] The utility model proposes a preferred embodiment of a power supply system for important equipment, such as Figure 1As shown, a power supply control box 2 and multiple power supply sources 3 are arranged in the industrial park to cooperate with the diesel generator set 1 for power supply of important equipment in the park; the power supply control box 2 centrally controls the diesel generator set 1 and multiple power supply sources 3, so that when a power outage occurs in the power supply load circuit 4, that is, when the incoming circuit breaker of the low-voltage cabinet group connected to the mains power supply circuit of the important equipment is disconnected due to power outage (power-off signal), the power supply control box 2 selectively controls the diesel generator set 1 or the power supply source 3 to supply power to the power supply load circuit 4 (the power supply end of the power supply is connected to the output end of the low-voltage cabinet outgoing circuit breaker of the power supply load circuit 4 through the power supply control box 2 to realize power supply); thereby achieving the goal of no need to change The capacity of the diesel generator set 1, when the power supply load circuit 4 is powered off, determines the power outage situation at this time and selectively configures the power supply to maintain the power supply of the power supply load circuit 4, so as to prevent important equipment from stopping operation, thereby achieving simple, fast and low-cost power supply for important equipment; and the type and quantity of the power supply 3 can be freely selected to flexibly respond to different power outage situations, for example: when the diesel generator set 1 is not running at full load, the diesel generator set 1 can supply power to important equipment through the busbar of the power supply load circuit 4, or when the diesel generator set 1 is running at full load, one or more power supply 3 can be selected to power important equipment, or as the power outage time gets longer, the power supply 3 can be gradually incorporated into the power supply.

[0031] Further, the power supply 3 is an energy storage power supply 31, other low-voltage room power supplies 32 and a mobile power supply 33; the power supply ends of the energy storage power supply 31, other low-voltage room power supplies 32 and the mobile power supply 33 are all used as the power supply ends of the power supply 3;

[0032] The power supply control box 2 is used to control the energy storage power supply 31 to supply power to the power supply load circuit 4 when the power-off signal received is less than the preset power-off time; when the power-off signal received is greater than or equal to the preset power-off time, control the mobile power supply 33 or the diesel generator set 1 to supply power to the power supply load circuit 4; when the power supply load circuit 4 is fault-powered off, control other low-voltage room power supplies 32 to supply power to the power supply load circuit 4.

[0033] In this embodiment, in order to better match various power outage power supply needs, energy storage power supply 31, other low-voltage room power supplies 32 in the industrial park (that is, the lines drawn from the low-voltage cabinets of the low-voltage distribution rooms of other buildings in the park) and mobile power supplies 33 are preferably used as power supply 3.

[0034] The energy storage power supply 31 has limited energy storage and is suitable for temporary power supply with a short power outage time (i.e., the power supply time is less than the preset power outage time, and the capacity of the energy storage power supply 31 is different, and the preset power outage time will also be set differently); more importantly, in the process of the energy storage power supply 31 supplying power to the power supply load circuit 4, as the energy storage capacity decreases, its frequency and voltage will gradually decrease, which is not conducive to the reliability of power supply, so the energy storage power supply 31 can only be used for temporary power supply.

[0035] The mobile power supply 33 is suitable for continuing to supply power to important equipment when the energy storage power supply 31 is out of power after the preset power-off time. The mobile power supply 33 can be moved over and electrically connected to the power supply control box 2 during the time when the energy storage power supply 31 is supplying power, waiting for the energy storage power supply 31 to be replaced for power supply. It does not need to be kept on standby in the park, thus saving costs.

[0036] The power supplies 32 of other low-voltage rooms only provide continuous power supply by borrowing the surplus capacity of other low-voltage rooms in the park when the power supply load circuit 4 is disconnected due to a fault. Because the fault repair time of the power supply load circuit 4 is unknown, preparations for long-term power supply must be made. The external power supply capacity may be large and the operation and maintenance cost may be quite high. Therefore, using the power supplies 32 of other low-voltage rooms for power supply is the best solution.

[0037] Furthermore, the power supply control box 2 includes a monitoring device 21, a power supply end switch 22, an isolating switch 23 and a quick access socket 24; the first communication end and the second communication end of the monitoring device 21 are respectively used as the first communication end and the second communication end of the power supply control box 2, the first incoming line end, the second incoming line end, the third incoming line end of the power supply end switch 22 and the incoming line end of the quick access socket 24 are all used as the input end of the power supply control box 2, the outgoing line end of the quick access socket 24 is electrically connected to one end of the isolating switch 23, the first outgoing line end, the second outgoing line end, the third outgoing line end of the power supply end switch 22 and the other end of the isolating switch 23 are all connected to the busbar of the power supply control box 2, the busbar lead-out line of the power supply control box 2 is used as the output end of the power supply control box 2, and the control end of the monitoring device 21 is electrically connected to the control end of the power supply end switch 22;

[0038] The first incoming line terminal, the second incoming line terminal, the third incoming line terminal of the power supply end switch 22 and the incoming line terminal of the quick access socket 24 are respectively used to electrically connect to the power supply terminals of the diesel generator set 1, the energy storage power supply 31, other low-voltage room power supplies 32 and the mobile power supply 33.

[0039] In this embodiment, the power supply control box 2 needs to control the diesel generator set 1, the energy storage power supply 31, other low-voltage room power supplies 32 and the mobile power supply 33. It is necessary to use the monitoring device 21 to receive the power-off signal and the operation status of the diesel generator set 1, and then control the power supply end switch 22 through the monitoring device 21 to realize the switching on and off of the diesel generator set 1, the energy storage power supply 31 and other low-voltage room power supplies 32; at the same time, since the mobile power supply 33 does not need to be always on standby and is transported when needed, it cannot be directly controlled automatically by the monitoring device 21. After the mobile power supply 33 is connected using the quick access socket 24, the switching on and off is controlled by manually opening and closing the isolating switch 23.

[0040] Furthermore, the monitoring device 21 is a synchronization device.

[0041] In this embodiment, it is preferred to use a synchronization device as the monitoring device 21, because when the synchronization device is in the closing operation, through precise control technology and synchronization algorithm, the voltage, frequency, phase and other parameters of the power supply to be connected to the power supply load circuit 4 are basically consistent with the operating system, thereby achieving a smooth and impact-free grid-connected process, that is, a senseless cut-in, which can ensure the stability and reliability of the power system and avoid interference or impact on important equipment due to power grid-connected fluctuations.

[0042] Further, the power supply end switch 22 is an all-in-one circuit breaker or a plurality of single-circuit circuit breakers;

[0043] When the power supply end switch 22 is a single-circuit circuit breaker, the inlet end of the single-circuit circuit breaker is used as the first inlet end, the second inlet end or the third inlet end of the power supply end switch 22, and the outlet end of the single-circuit circuit breaker is used as the first outlet end, the second outlet end or the third outlet end of the power supply end switch 22;

[0044] When the power supply end switch 22 is a multi-in-one circuit breaker, the incoming line end of the multi-in-one circuit breaker is used as the first incoming line end, the second incoming line end and the third incoming line end of the power supply end switch 22, and the outgoing line end of the multi-in-one circuit breaker is used as the first outgoing line end, the second outgoing line end and the third outgoing line end of the power supply end switch 22.

[0045] In this embodiment, because the power supply end switch 22 serves as the grid-connected switch for the diesel generator set 1, the energy storage power supply 31 and other low-voltage room power supplies 32, there are many ways to connect them to the grid. They can be switched on and off simultaneously or one by one by the monitoring device 21 or manually, and need to be freely set according to specific usage scenarios and operating habits. Therefore, the power supply end switch 22 can be an all-in-one circuit breaker or multiple single-circuit circuit breakers.

[0046] Furthermore, the energy storage power supply 31 includes an energy storage grid-connected cabinet 311 and at least one energy storage group 312; the power supply end of the energy storage grid-connected cabinet 311 is used as the power supply end of the energy storage power supply 31, and the power supply end of the energy storage grid-connected cabinet 311 is electrically connected to the output end of the energy storage group 312.

[0047] In this embodiment, a storage power supply 31 is usually provided in the power system as a backup power supply, which is connected to the grid using an energy storage grid-connected cabinet 311. Therefore, the monitoring device 21 can be electrically connected to the power supply end (i.e., the circuit breaker outlet end) of the energy storage grid-connected cabinet 311 to obtain the electric energy stored in the energy storage group 312.

[0048] Furthermore, the energy storage group 312 includes an energy storage combiner box 313 and at least one energy storage cabinet 314; the output end of the energy storage combiner box 313 is used as the output end of the energy storage group 312, and multiple input ends of the energy storage combiner box 313 are electrically connected to the output end of the energy storage cabinet 314 respectively.

[0049] In this embodiment, the total capacity of the energy storage group 312 is the sum of the capacities of the energy storage cabinets 314, so the incoming line circuit breakers of the busbar of the energy storage combiner box 313 are used to connect the energy storage cabinets 314 to combine electric energy to the busbar, and then the outgoing line circuit breakers of the busbar of the energy storage combiner box 313 are connected to the power supply end of the energy storage grid-connected cabinet 311 to be connected to the grid.

[0050] Furthermore, the mobile power source 33 is a diesel generator truck.

[0051] In this embodiment, because the mobile power supply 33 is not always available, it is transported to be powered by the energy storage power supply 31 when needed, so the mobile power supply 33 is preferably a diesel generator truck, which has better mobility.

[0052] Other structures and operations of the power supply system for important equipment according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0053] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A power supply system for important equipment, characterized by: It comprises a diesel generator set, a power supply control box and a plurality of power supply sources; the power supply end of the power supply source is electrically connected to the input end of the power supply control box, the output end of the power supply control box is electrically connected to the power supply end of the power supply load circuit, the communication end of the diesel generator set is electrically connected to the first communication end of the power supply control box, the input end of the power supply load circuit is electrically connected to the second communication end of the power supply control box, and the power supply end of the diesel generator set is electrically connected to the busbar of the power supply load circuit; The power supply control box is used to selectively control the diesel generator set or the power supply to supply power to the power supply load circuit when receiving a power-off signal of the power supply load circuit.

2. The power supply system for important equipment according to claim 1 is characterized in that: The power supply for guaranteeing power supply is an energy storage power supply, other low-voltage power supply in the room and a mobile power supply; the power supply ends of the energy storage power supply, the other low-voltage power supply in the room and the mobile power supply are all used as the power supply ends of the power supply for guaranteeing power supply; The power supply control box is used to control the energy storage power supply to supply power to the power supply load circuit when the power off signal received is less than the preset power off time; when the power off signal received is greater than or equal to the preset power off time, control the mobile power supply or the diesel generator set to supply power to the power supply load circuit; when the power supply load circuit is fault-powered off, control the other low-voltage room power supplies to supply power to the power supply load circuit.

3. The power supply system for important equipment according to claim 2 is characterized in that: The power supply control box includes a monitoring device, a power supply end switch, an isolating switch and a quick access socket; the first communication end and the second communication end of the monitoring device are respectively used as the first communication end and the second communication end of the power supply control box, the first incoming line end, the second incoming line end, the third incoming line end of the power supply end switch and the incoming line end of the quick access socket are all used as the input end of the power supply control box, the outgoing line end of the quick access socket is electrically connected to one end of the isolating switch, the first outgoing line end, the second outgoing line end, the third outgoing line end of the power supply end switch and the other end of the isolating switch are all connected to the busbar of the power supply control box, the busbar lead-out line of the power supply control box is used as the output end of the power supply control box, and the control end of the monitoring device is electrically connected to the control end of the power supply end switch; The first incoming line terminal, the second incoming line terminal, the third incoming line terminal of the power supply end switch and the incoming line terminal of the quick access socket are respectively used to electrically connect to the power supply terminals of the diesel generator set, the energy storage power supply, the other low-voltage room power supplies and the mobile power supply.

4. The power supply system for important equipment according to claim 3 is characterized in that: The monitoring device is a synchronous device.

5. The power supply system for important equipment according to claim 3 is characterized in that: The power supply end switch is an all-in-one circuit breaker or multiple single-circuit circuit breakers; When the power supply end switch is the single-circuit circuit breaker, the inlet end of the single-circuit circuit breaker is used as the first inlet end, the second inlet end or the third inlet end of the power supply end switch, and the outlet end of the single-circuit circuit breaker is used as the first outlet end, the second outlet end or the third outlet end of the power supply end switch; When the power supply end switch is the multi-in-one circuit breaker, the incoming line end of the multi-in-one circuit breaker is respectively used as the first incoming line end, the second incoming line end and the third incoming line end of the power supply end switch, and the outgoing line end of the multi-in-one circuit breaker is used as the first outgoing line end, the second outgoing line end and the third outgoing line end of the power supply end switch.

6. The power supply system for important equipment according to claim 2 is characterized in that: The energy storage power supply includes an energy storage grid-connected cabinet and at least one energy storage group; the power supply end of the energy storage grid-connected cabinet is used as the power supply end of the energy storage power supply, and the power supply end of the energy storage grid-connected cabinet is electrically connected to the output end of the energy storage group.

7. The power supply system for important equipment according to claim 6 is characterized in that: The energy storage group includes an energy storage combiner box and at least one energy storage cabinet; the output end of the energy storage combiner box is used as the output end of the energy storage group, and multiple input ends of the energy storage combiner box are electrically connected to the output ends of the energy storage cabinet respectively.

8. The power supply system for important equipment according to claim 2 is characterized in that: The mobile power source is a diesel generator truck.

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