Power divider, intelligent power distribution system and power distribution method

Abstract

The invention relates to a power divider, an intelligent electric power distribution system and a power distribution method. The power divider comprises a current transformer, a PLC, a relay module, a power supply module and a man-machine interaction module. The current transformer is used for carrying out current detection on an incoming line current value of the power utilization system. The PLC is used for generating a control signal based on the incoming line current value and the current set value of the power utilization system. And the relay module is used for respectively controlling each path of power utilization unit based on the control signal. The man-machine interaction module is used for setting a current set value and displaying an incoming line current value. The intelligent power distribution system comprises a strong current cabinet and the power divider arranged in the strong current cabinet, and an air switch and a leakage protection device are further arranged in the strong current cabinet. The power distribution method is applied to the power divider. The power distribution function is realized based on the strong electric signal of the PLC, so that the construction scheme is simplified, the construction workload is reduced, the construction material and labor cost is reduced, the safety is improved, and butt joint with an intelligent system is facilitated.

Description

Technical Field

[0001] The present invention relates to the field of automatic control technology, and in particular to a power distributor, an intelligent power allocation system and a power distribution method for a power consumption system. Background Art

[0002] The power distributor is a device that controls the power of the power system based on the sampled current. Existing power distributors often sample solutions including current sensors, microprocessors, relays, etc., which implement power distribution functions based on weak current signals. Therefore, when constructing the power system, two sets of systems, strong current and weak current, are required. There are problems such as high construction complexity, many pre-buried pipelines, difficulty in laying pipes, high material and labor costs, and it is difficult to connect to intelligent systems. In addition, the power distribution method used by the power distributor also needs to be further improved. Summary of the invention

[0003] The purpose of the present invention is to provide a power distributor which can simplify construction, reduce costs and improve safety.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: A power distributor is used for distributing power to an electric power system, wherein the electric power system comprises n electric power units numbered 1 to n and the electric power system is equipped with a strong power control system, and the power distributor comprises: A current transformer, the current transformer being connected to the incoming line of the power system, the current transformer being used to detect the incoming line current value of the power system, and outputting a current detection signal corresponding to the detected incoming line current value of the power system; A PLC, the PLC is connected to the current transformer, the PLC is used to receive the current detection signal output by the current transformer, generate a control signal based on the incoming line current value and the current setting value of the power system, and output the control signal; A relay module, the relay module is connected to the PLC, the relay module is connected to each of the power consumption units through the strong power control system, and the relay module is used to receive the control signal and control each of the power consumption units to be powered off or powered on based on the control signal, so that the actual total load of the power consumption system is less than or equal to the set power capacity of the power consumption system; A power supply module, wherein the power supply module is connected to the PLC and is used to provide power to the PLC.

[0005] The power distributor also includes: A human-computer interaction module is connected to the PLC and is used to set the current setting value required in the PLC and display the incoming current value of the power system detected by the current transformer.

[0006] The present invention also provides an intelligent power allocation system constructed based on the above power distributor, and its solution is: A smart power allocation system is used to allocate power to an electric power system. The smart power allocation system includes a high-voltage cabinet equipped with a high-voltage control system configured for the electric power system and the aforementioned power distributor. The power distributor is arranged in the high-voltage cabinet. The high-voltage cabinet is also provided with an air switch and a leakage protection device matching the electric power system. The air switch and the leakage protection device are connected to the electric power system through wires.

[0007] The power distributor is movably arranged in the high-voltage cabinet via a slide rail.

[0008] The present invention also provides a power distribution method suitable for the above-mentioned power distributor, and the scheme is: A power distribution method, applied to the aforementioned power distributor, the power distribution method comprising a power-off control method and a power-on control method; The power-off control method is applied when n power-consuming units are all powered on, and the power-off control method is: multiple power-off control current detections are performed on the incoming current value of the power system: when the p1th power-off control current detection is performed, if the incoming current value of the power system detected is greater than the current setting value, the first power unit is controlled to be powered off; when the p2th power-off control current detection is performed, if the incoming current value of the power system detected is greater than the current setting value, the second power unit is controlled to be powered off; and so on, when the pth power-off control current detection is performed n When the current value detected by the power-off control is greater than the current setting value, the power-off of the nth power unit is controlled; p1<p2<…<p n If the p i If the incoming current value of the power system detected during the current detection for the second power-off control is less than or equal to the current setting value or all the power units are powered off, the method will be jumped to the power-on control method, p i = p1+1 or p i =p2+1 or…or p i =p n-1 +1; The power-on control method is applied when the m-way power-using element is powered off, 1≤m≤n, and the power-on control method is: The m power-off power units are arranged into a queue, and each power unit in the queue is selected in sequence as a detection object to perform power-on control current detection on the incoming current value of the power system: when the power unit with the largest number in the queue is selected as the detection object for power-on control current detection, if the detected incoming current value of the power system meets the power-on condition of the power unit with the largest number in the queue, then after controlling the power unit with the largest number in the queue to be powered on, the power unit with the largest number is deleted from the queue to update the queue, and the power-on control method is re-executed, otherwise the power unit with the second largest number in the queue is selected as the detection object for power-on control current detection; when the power unit with the second largest number in the queue is selected as the detection object for power-on control current detection, if the detected incoming current value of the power system meets the power-on condition of the power unit with the second largest number in the queue. If the power-on condition is met, then after the second largest power unit in the queue is powered on, the second largest power unit is deleted from the queue to update the queue, and the power-on control method is re-executed, otherwise the third largest power unit in the queue is selected as the detection object to perform power-on control current detection; by analogy, when the smallest power unit in the queue is selected as the detection object to perform power-on control current detection, if the detected incoming current value of the power system meets the power-on condition of the smallest power unit in the queue, then after the smallest power unit in the queue is powered on, the smallest power unit is deleted from the queue to update the queue, and the power-on control method is re-executed, otherwise the largest power unit in the queue is selected as the detection object to perform power-on control current detection to realize the cycle, and the power-off control method is returned after the queue is empty.

[0009] In the power-on control method, the power-on condition of the power-consuming unit with the largest number s in the queue is: the judgment current value corresponding to the power-consuming unit with the largest number s in the queue is less than or equal to the current setting value, 1≤s≤m; The calculation method of the judgment current value corresponding to the power unit with the sth largest number in the queue is as follows: obtain the incoming current value of the power system detected during the last power-off control current detection before the power unit with the sth largest number in the queue was powered off as the first current value, obtain the incoming current value of the power system detected during the first power-off control current detection after the power unit with the sth largest number in the queue was powered off as the second current value, obtain the incoming current value of the power system detected when the power unit with the sth largest number in the queue was selected as the detection object and the power-on control current detection was performed as the third current value, then the judgment current value corresponding to the power unit with the sth largest number in the queue is equal to the difference between the first current value and the second current value and the sum of the third current value.

[0010] In the power-off control method, the time interval between two adjacent power-off control current detections is a first time interval, and in the power-on control method, the time interval between two adjacent power-on control current detections is a second time interval, and the second time interval is longer than the first time interval.

[0011] The first time interval is 0.1-10 seconds, and the second time interval is 10 seconds to 30 minutes.

[0012] In the power-on control method, if the incoming current value of the power system detected during the power-on control current detection is greater than the current setting value and the duration reaches a preset time threshold, all the power units are forced to be powered off; if the incoming current value of the power system detected during the power-on control current detection is 0, all the power units are forced to be powered on.

[0013] The time threshold is from 30 seconds to 1 hour.

[0014] Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the present invention realizes the power distribution function based on the strong electric signal of PLC, thereby simplifying the construction plan, reducing the construction workload, reducing the material and labor costs of construction, improving safety, rationalizing the distribution plan, and facilitating docking with the intelligent system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 It is a principle block diagram of the power divider of the present invention.

[0016] Attached Figure 2 The figure is a flow chart of the power allocation method of the present invention.

[0017] Attached Figure 3 It is a wiring diagram of the power distributor of the present invention connected to the floor heating system. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0019] A power system includes n power units numbered 1 to n, and is equipped with a strong power control system to control its power consumption. Usually, the strong power control system is set in the strong power cabinet, which is also equipped with air switches, leakage protection devices and other parts of the power system. The air switches and leakage protection devices are connected to the power system through wires to achieve corresponding functions. Taking the floor heating system (i.e., the power system) as an example, a floor heating system used by each user includes n parallel-connected heating units (i.e., power units). These heating units are numbered in sequence as the first heating unit, the second heating unit, ..., the nth heating unit. For example, a heating unit is arranged in each room of the user, and the heating units in multiple rooms are connected in parallel to form a heating system. The user is equipped with a strong power cabinet at the entrance, with a built-in strong power control system.

[0020] As attached Figure 1 As shown, the power distributor for distributing power to the above-mentioned power consumption system includes a current transformer, a PLC, a relay module, a power module and a human-machine interaction module. The PLC is connected to the current transformer; the relay module is connected to the PLC, and is also connected to each power consumption unit through a strong power control system; the power module is connected to the PLC, and the human-machine interaction module is connected to the PLC.

[0021] The current transformer is set at the user's incoming line, such as after the air switch, and is used to detect the incoming current value of the power system and output the current detection signal corresponding to the detected incoming current value of the power system. The PLC is used to receive the current detection signal output by the current transformer, generate a control signal based on the incoming current value of the power system and the current setting value, and output the control signal. The relay module is used to receive the control signal, and control the power off or on of each power unit based on the control signal, so that the actual total load of the power system is less than or equal to the set capacity of the power system. The relay module includes at least n relays with a load capacity of more than 16A, which respectively control n power units. These relays are connected to each power unit through the leakage protection device in the high-voltage cabinet, so that the leakage protection device is controlled by the relay, and then the switch of the power unit is controlled. The power module is used to provide power for the PLC, which includes an AC-DC converter to convert the external power supply into a 24V DC power signal suitable for the PLC. The power module can be configured with a power button for control. The human-computer interaction module is used to set the current setting value required in the PLC and display the incoming current value of the power system detected by the current transformer. It includes several buttons and LED displays / digital tubes.

[0022] The power distributor is arranged in a high-voltage cabinet, for example, it can be movably arranged in the high-voltage cabinet through structures such as slide rails, so that the high-voltage cabinet and the high-voltage control system, power distributor, air switch, leakage protection device, etc. of the power system arranged therein together constitute an intelligent power allocation system. PLC, relay module, power module and human-computer interaction module can be integrated in the same housing, and easily damaged parts, such as relays, are installed in a replaceable manner.

[0023] When the power distributor is used in the heating system, the heating units in each room can be started and stopped alternately. When high-power household electricity is connected, it will intelligently judge and synchronously shut down the heating unit load of a certain circuit based on the user's total electricity consumption and priority level, so that the total indoor electricity load does not exceed the original user-set power capacity. When the high-power electrical appliances are turned off and the heating system load is met, the heating system automatically starts and runs.

[0024] The power distribution method adopted by the above power distributor includes two parts: power-off control method and power-on control method. The current setting value involved is pre-set through the human-computer interaction module, which is the maximum allowable current and can be freely set as needed, and the setting range is usually 0-100A.

[0025] The PLC can also be configured with overload protection (when all power-consuming units are powered off, but the current collected by the current transformer is still greater than the current setting value, the PLC will be powered off) and short-circuit protection (when the relay is incorrectly connected to the neutral wire or the ground wire, a potential difference is generated and the PLC will be powered off).

[0026] 1. Power-off control method The power-off control method is applied when all n power-consuming units are powered on. The power-off control method is: The current transformer is used to perform multiple power-off control current detections on the incoming current value of the power system. After each power-off control current detection, it is necessary to judge the magnitude relationship between the detected incoming current value of the power system and the current setting value, as follows: In the following scheme, p1<p2<…<p n . When the current detection for power-off control is performed, if the incoming current value of the power system detected is less than or equal to the current setting value, the operating state of the power system does not change, and the next power-off control current detection is continued until the p1th power-off control current detection is performed. When the p1th power-off control current detection is performed, if the incoming current value of the power system detected is greater than the current setting value, the first power unit is controlled to be powered off. After the first power unit is powered off, the next power-off control current detection is continued. After the first power unit is powered off, when the p1th power-off control current detection is performed i (At this time p i= p1+1) power-off control current detection, if the detected incoming current value of the power system is less than or equal to the current setting value, then jump to the power-on control method, otherwise it is equivalent to performing the p2th power-off control current detection. When performing the p2th power-off control current detection, if the detected incoming current value of the power system is greater than the current setting value, the second power unit is controlled to be powered off. After the second power unit is powered off, continue to perform the next power-off control current detection. After the second power unit is powered off, when performing the p i (At this time p i = p2+1) power-off control current detection, if the detected incoming current value of the power system is less than or equal to the current setting value, then jump to the power-on control method, otherwise it is equivalent to performing the p3th power-off control current detection. Similarly, when performing the p n-1 During the first power-off control current detection, if the incoming current value of the power system detected is greater than the current setting value, the n-1th power unit will be controlled to be powered off. After the n-1th heating unit is powered off, the next power-off control current detection will be performed. After the n-1th power unit is powered off, if the pth i (At this time p i = p n-1 +1) During the current detection of the power-off control, if the incoming current value of the power system detected is less than or equal to the current setting value, it will jump to the power-on control method, otherwise it is equivalent to the pth n The first power-off control uses current detection. n If the incoming current value of the power system detected during the current detection of the first power-off control is greater than the current setting value, the nth power unit will be controlled to be powered off. At this time, all power units are powered off and the method jumps to the power-on control method.

[0027] As attached Figure 2As shown, the heating system (power system) includes four heating units (power units). After the power-off control method is started, the first power-off control current detection is performed, and the measured incoming current value of the heating system is represented by the current value ①. It is judged whether the current value ① is greater than the current setting value (step K0). If so, the first heating unit is controlled to be powered off. If not, the power-off control current detection is continued, the current value ① is updated and the magnitude relationship between the current value ① and the current setting value is judged until the first heating unit needs to be powered off. The number of power-off control current detections performed at this time is the value of p1. After the first heating unit is powered off, the p1+1th power-off control current detection is performed, and the measured incoming current value of the heating system is represented by the current value ②. It is judged whether the current value ② is greater than the current setting value (step K10). If so, the second heating unit is controlled to be powered off. If not, it jumps to the power-on control method. The number of power-off control current detections performed when the second heating unit is powered off is the value of p2. After the second heating unit is powered off, the p2+1th power-off control current detection is performed, and the measured incoming current value of the heating system is represented by the current value ③, and it is judged whether the current value ③ is greater than the current setting value (step K20). If so, the third heating unit is controlled to be powered off, if not, it jumps to the power-on control method. The number of power-off control current detections performed when the third heating unit is powered off is the value of p3. After the third heating unit is powered off, the p3+1th power-off control current detection is performed, and the measured incoming current value of the heating system is represented by the current value ④, and it is judged whether the current value ④ is greater than the current setting value (step K30). If so, the fourth heating unit is controlled to be powered off, if not, it jumps to the power-on control method. After the fourth heating unit is powered off, all heating units are powered off, and the control method also jumps to the power-on control method.

[0028] In the above power-off control method, current detection for power-off control is performed at the same time interval, and the time interval between two adjacent current detections for power-off control is a first time interval, which can be set to any value in the range of 0.1-10 seconds.

[0029] 2. Power-on control method The power-on control method is applied to the case where the m (1≤m≤n) circuits are powered off. The power-on control method is: The above preset current setting value is still used. The current transformer is used to perform multiple current detections on the incoming current value of the power system, as follows: Arrange the m power-off power units into a queue, select each power unit in the queue as a detection object in sequence, and perform power-on control current detection on the incoming current value of the power system: when selecting the power unit with the largest number in the queue as the detection object for power-on control current detection, if the detected incoming current value of the power system meets the power-on condition of the power unit with the largest number in the queue, then after the power unit with the largest number in the queue is controlled to be powered on, the power unit with the largest number is deleted from the queue and the queue is updated, and the power-on control method is re-executed, otherwise the power unit with the second largest number in the queue is selected as the detection object for power-on control current detection. When the second largest power unit in the queue is selected as the detection object and the current detection for power-on control is performed, if the detected incoming current value of the power system meets the power-on condition of the second largest power unit in the queue, then after the second largest power unit in the queue is powered on, the second largest power unit is deleted from the queue, the queue is updated, and the power-on control method is re-executed, otherwise the third largest power unit in the queue is selected as the detection object and the power-on control current detection is performed. Similarly, when the smallest numbered power unit (i.e., the mth largest numbered power unit) in the queue is selected as the detection object and the current detection for power-on control is performed, if the detected incoming current value of the power system meets the power-on condition of the smallest numbered power unit in the queue, then after the smallest numbered power unit in the queue is powered on, the smallest numbered power unit is deleted from the queue, the queue is updated, and the power-on control method is re-executed, otherwise the largest numbered power unit in the queue is selected for power-on control current detection to realize the cycle, until the queue is empty and the power-off control method is returned.

[0030] In actual application, when implementing the power-on control method, the power units can be selected in order of their numbers from large to small. First, determine whether the currently selected electric heating unit is powered on. If it is powered on, the heating unit is not in the queue, so continue to determine whether the next power unit is powered on. If the currently selected power unit is not powered on, it should be in the queue, so next determine whether the power-on condition of the currently selected power unit is met after the power-on control current detection. Arrange the power units in the queue in order of numbers from large to small. In the above-mentioned power-on control method, the power-on condition of the power unit with the largest number s (1≤s≤m) in the queue is: the judgment current value corresponding to the power unit with the largest number s in the queue is less than or equal to the current setting value. The calculation method of the judgment current value corresponding to the power unit with the largest number s in the queue is: obtain the incoming line current value of the power system detected when the power-off control current detection is performed for the last time before the power unit with the largest number s in the queue is powered off as the first current value, obtain the incoming line current value of the power system detected when the power-off control current detection is performed for the first time after the power unit with the largest number s in the queue is powered off as the second current value, obtain the incoming line current value of the power system detected when the power unit with the largest number s in the queue is selected as the detection object and the power-on control current detection is performed as the third current value, then the judgment current value corresponding to the power unit with the largest number s in the queue is equal to the difference between the first current value and the second current value and the sum of the third current value.

[0031] As attached Figure 2 As shown, in this embodiment, the power-on control method includes the following four parts: 1) After the first heating unit is powered off and before the second heating unit is powered off, jump to the power-on control method.

[0032] At this time, only the first heating unit is in the power-off state, that is, there is only the first heating unit in the queue. Then the current detection performed after the first heating unit is powered off, that is, the power-off control current detection performed before judging that the incoming current value of the detected heating system is less than or equal to the current setting value (step K10), is also used as a power-on control current detection, that is, the power-on control current detection performed by selecting the largest numbered heating unit in the queue, that is, the only first heating unit in the current queue as the detection object, then the incoming current value of the heating system represented by the current value ② also represents the incoming current value of the heating system detected during the power-on control current detection. Next, it is judged whether the incoming current value of the heating system detected meets the power-on condition of the largest numbered heating unit in the queue, that is, the first heating unit. For the first heating unit, its power-on condition is that its corresponding judgment current value is less than or equal to the current setting value. The judgment current value corresponding to the first heating unit is calculated in the following way: the incoming current value of the heating system detected when the last power-off control current detection is performed before the first heating unit is powered off is obtained as the first current value, and the first current value is represented by current value ①; the incoming current value of the heating system detected when the first power-off control current detection is performed after the first heating unit is powered off is obtained as the second current value, and the second current value is represented by current value ②; the incoming current value of the heating system detected when the first heating unit is selected as the detection object and the power-on control current detection is obtained as the third current value, and the third current value is represented by the second current value ②. Then the judgment current value corresponding to the first heating unit is equal to the difference between the first current value and the second current value and the sum of the third current value, which is simplified as current (①-②)+②, where the current (①-②) part is a fixed value, and the last current ② is a non-fixed value, which changes with the multiple power-on control current detections. Therefore, it is necessary to determine whether the current (①-②)+② is greater than the current setting value (step K12). If the power-on condition of the first heating unit is met, that is, the current (①-②) + ② is less than or equal to the current setting value, the first heating unit is controlled to be powered on, and then the queue is updated. Since the updated queue is empty at this time, the power-off control method is returned. If the power-on condition of the first heating unit is not met, that is, the current (①-②) + ② is greater than the current setting value, the second largest heating unit in the queue is selected as the detection object and the current detection for power-on control is performed. Since there is still only the first heating unit in the queue at this time, and the first heating unit is also the last heating unit in the queue, the heating unit with the largest number in the queue is selected as the detection object, that is, the first heating unit is selected as the detection object for power-on control current detection. At this time, after the detection, the second current value ② needs to be updated to judge the power-on condition until the first heating unit is powered on and returns to the power-off control method.

[0033] 2) After the second heating unit is powered off and before the third heating unit is powered off, jump to the power-on control method.

[0034] At this time, the first heating unit and the second heating unit are in a power-off state, that is, the queue includes the first heating unit and the second heating unit, and they are arranged from large to small in number as the second heating unit and the first heating unit.

[0035] The current detection performed after the second heating unit is powered off is both a current detection for power-off control and a current detection for power-on control. When used as a current detection for power-off control, the incoming current value of the heating system represented by the current value ③ is detected to determine whether it is necessary to jump to the power-on control method, that is, to determine whether the incoming current value of the heating system detected is greater than the current setting value (step K20). If not, that is, the incoming current value of the heating system is less than or equal to the current setting value, the power-on control method is jumped. When used as a current detection for power-on control, the incoming current value of the heating system represented by the second current value ③ is detected to determine whether the power-on condition of the second heating unit is met. The calculation method of the judgment current value corresponding to the second heating unit is: the difference obtained by subtracting the incoming current value of the heating system detected when the last power-off control current detection was performed before the second heating unit was powered off from the incoming current value of the heating system detected when the first power-off control current detection was performed after the second heating unit was powered off, plus the incoming current value of the heating system detected when the power-on control current detection was performed by selecting the second heating unit as the detection object, that is, simplified as current (②-③)+③, where the current (②-③) part is a fixed value, and the final current ③ is a non-fixed value, which changes with the multiple power-on control current detections. After calculating the judgment current value corresponding to the second heating unit, determine its size relationship with the current setting value, that is, determine whether the current (②-③)+③ is greater than the current setting value (step K22). If the power-on condition of the second heating unit is met, that is, the current (②-③)+③ is less than or equal to the current setting value, the second heating unit is controlled to be powered on. At this time, it can be judged whether the first heating unit is powered on (step K14), and then the queue is updated. If the first heating unit is not powered on, the updated queue only includes the first heating unit, and the power-on control method is re-executed. The process is similar to part 1). If the power-on condition of the second heating unit is not met, that is, the current (②-③)+③ is greater than the current setting value, it is judged whether the first heating unit is powered on (step K24). If the first heating unit is not powered on, the first heating unit is located in the second position in the queue, so the first heating unit is again tested for power-on control current, and the incoming current value of the heating system obtained by the detection is updated with the current value ③. The updated current value ③ is actually the incoming current value of the heating system detected when the first heating unit is selected as the detection object and the current detection for power-on control is performed.

[0036] Determine whether the detected incoming current value of the heating system meets the power-on condition of the first heating unit, that is, determine whether the current (①-②)+③ is greater than the current setting value (step K26). If the power-on condition of the first heating unit is met, that is, the current (①-②)+③ is less than or equal to the current setting value, then the first heating unit is controlled to be powered on and the updated queue only includes the second heating unit. Since the first heating unit is the heating unit with the smallest number in the queue, the heating unit with the largest number in the queue, that is, the second heating unit, is selected as the detection object to perform power-on control current detection again and determine whether its power-on condition is met, thereby completing the cycle.

[0037] 3) After the third heating unit is powered off and before the fourth heating unit is powered off, jump to the power-on control method.

[0038] At this time, the first heating unit, the second heating unit and the third heating unit are all in a power-off state, that is, the queue includes the third heating unit, the second heating unit, and the first heating unit in sequence.

[0039] Similar to the above process, a current detection for power-on control is first performed to determine whether the power-on conditions of the third heating unit are met, that is, to determine whether the current (③-④)+④ is greater than the current setting value (step K32). If so, the third heating unit is controlled to be powered on, and then a current detection for power-on control is performed again to determine whether the power-on conditions of the second heating unit are met, and so on. If the power-on condition of the third heating unit is not met, then the second heating unit is judged to be the next element in the queue by first judging whether the second heating unit is powered on (step K34). If so, the current detection for power-on control is performed again, and it is judged whether the power-on condition of the second heating unit is met, that is, it is judged whether the current (②-③)+④ is greater than the set value (step K36), where the current ④ is the current value of the heating system obtained when the second heating unit is selected as the detection object and the power-on control current detection is performed the most recently. After the power-on condition of the second heating unit is met, the second heating unit is controlled to be powered on and the queue is updated, that is, the cycle is repeated until the second heating unit is taken as the object, and it can be judged that it is not in the queue by its power-on state. If the power-on condition of the second heating unit is not met, the first heating unit is selected as the detection object and the power-on control current detection is performed. Similarly, first determine whether the first heating unit is powered on to determine whether it is the next element in the queue (step K38). If so, perform another power-on control current detection and determine whether the power-on condition of the first heating unit is met, that is, determine whether the current (①-②)+④ is greater than the set value (step K39), where current ④ is the current value of the heating system obtained when the first heating unit is selected as the detection object and the power-on control current detection is performed. If the power-on condition of the first heating unit is met, the first heating unit is controlled to be powered on and then returned to the heating unit with the largest number in the selection queue to restart the determination of whether it meets the corresponding power-on condition. Otherwise, it directly returns to the heating unit with the largest number in the selection queue to restart the determination of whether it meets the corresponding power-on condition. Repeat this cycle until the queue is empty.

[0040] 3) After the fourth heating unit is powered off, jump to the power-on control method.

[0041] At this time, the four heating units are in a power-off state, that is, the queue includes the fourth heating unit, the third heating unit, the second heating unit, and the first heating unit in sequence.

[0042] First, a current detection for power-on control is performed to determine whether the power-on condition of the fourth heating unit is met, that is, whether the current (④-⑤)+⑤ is greater than the current setting value (step K40). If so, continue to determine whether the third heating unit is powered on to determine whether it is the next element in the queue (step K42). If so, another current detection for power-on control is performed to determine whether the power-on condition of the third heating unit is met, that is, whether the current (③-④)+⑤ is greater than the set value (step K44), wherein current ⑤ is the current value of the heating system obtained when the third heating unit was most recently selected as the detection object and the current detection for power-on control was performed. If the power-on condition of the third heating unit is met, the third heating unit is controlled to be powered on, the queue is updated and the third heating unit is deleted from the queue, and the fourth heating unit with the largest number in the queue is re-selected as the detection object and the power-on control current detection is re-performed to determine whether the power-on condition is met. If the power-on condition of the third heating unit is not met, the second heating unit is determined to be the next element in the queue by determining whether it is powered on (step K46). If so, the power-on control current detection is performed again to determine whether the power-on condition of the second heating unit is met, that is, to determine whether the current (②-③)+⑤ is greater than the set value (step K48), wherein the current ⑤ is the current value of the heating system obtained when the second heating unit was most recently selected as the detection object and the power-on control current detection was performed. If the power-on condition of the second heating unit is met, the second heating unit is controlled to be powered on, the queue is updated and the third heating unit is deleted from the queue, and the fourth heating unit with the largest number in the queue is re-selected as the detection object to re-perform power-on control current detection and determine whether its power-on condition is met. If the power-on condition of the second heating unit is not met, continue to determine whether the first heating unit is powered on to determine whether it is the next element in the queue. If so, perform power-on control current detection again to determine whether the power-on condition of the first heating unit is met, that is, determine whether the current (①-②)+⑤ is greater than the set value (step K48), where current ⑤ is the current value of the heating system obtained when the first heating unit was most recently selected as the detection object and the power-on control current detection was performed. If the power-on condition of the first heating unit is met, the first heating unit is controlled to be powered on, the queue is updated and the first unit is deleted from the queue, and the fourth heating unit with the largest number in the queue is re-selected as the detection object to re-power on the control current detection and determine whether the power-on condition is met. If the power-on condition of the first heating unit is not met, it is immediately returned to select the fourth heating unit with the largest number in the queue as the detection object to re-power on the control current detection and determine whether the power-on condition is met. The control process is realized in this way.After the queue is empty, that is, after all heating units are powered on again, the power-off control method is returned.

[0043] In the above-mentioned power-on control method, current detection for power-on control is performed at the same time interval, and the time interval between two adjacent current detections for power-on control is the second time interval. The second interval is longer than the first time interval and can be set to any value in the range of 10 seconds to 30 minutes. During this process, since the current becomes smaller, the power distributor can control the power unit to turn on again.

[0044] In addition, in the power-on control method, if the incoming current value of the power system detected during the power-on control current detection is greater than the current setting value for a duration that reaches a preset time threshold (for example, the time threshold is set to any value in the range of 30 seconds to 1 hour), power frequency modulation is no longer performed, but all power units are forced to be powered off. If the incoming current value of the power system detected during the power-on control current detection is 0, all power units are forced to be powered on. The stage of continuous current detection is defined as the transition stage, and forcing all power units to be powered off or forcing all power units to be powered on is defined as the forced protection stage.

[0045] The above-mentioned intelligent power dispatching system can also be set with a memory function, that is, it will memorize the current status of its various parts when the power is cut off, and can quickly restore the memorized status and maintain the status after the power supply is restored.

[0046] As attached Figure 3 As shown, the above-mentioned power distributor connected to the floor heating system is arranged in the PLC control cabinet and connected to the high-voltage box. During construction, it is necessary to set up high-voltage system pipes, pipes between relays, pipes between junction boxes and relays, pipes between high-voltage boxes and low-voltage boxes, etc. Its advantages mainly lie in: adopting a PLC-based power distributor to realize temperature control of the floor heating system, being able to control the power off or on of the floor heating unit according to the ambient temperature, thus improving safety, and eliminating the need to pre-buried low-voltage wires and pipelines for the power distribution function, thereby reducing the number of pre-buried pipelines, and reducing the material and labor costs of low-voltage wires and pipelines. The PLC can also open a bus interface that can be connected to the intelligent system.

[0047] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A power distributor for distributing power to an electric power system, wherein the electric power system comprises n electric power units numbered 1 to n and the electric power system is equipped with a strong power control system, characterized in that: The power distributor comprises: A current transformer, the current transformer being connected to the incoming line of the power system, the current transformer being used to detect the incoming line current value of the power system, and outputting a current detection signal corresponding to the detected incoming line current value of the power system; A PLC, the PLC is connected to the current transformer, the PLC is used to receive the current detection signal output by the current transformer, generate a control signal based on the incoming line current value and the current setting value of the power system, and output the control signal; A relay module, the relay module is connected to the PLC, the relay module is connected to each of the power consumption units through the strong power control system, and the relay module is used to receive the control signal and control each of the power consumption units to be powered off or powered on based on the control signal, so that the actual total load of the power consumption system is less than or equal to the set power capacity of the power consumption system; A power supply module, wherein the power supply module is connected to the PLC and is used to provide power to the PLC.

2. The power divider according to claim 1, characterized in that: The power distributor also includes: A human-computer interaction module is connected to the PLC and is used to set the current setting value required in the PLC and display the incoming current value of the power system detected by the current transformer.

3. An intelligent power allocation system, used for power allocation of power consumption systems, characterized by: The intelligent power dispatching system comprises a high-voltage cabinet provided with a high-voltage control system configured for the power consumption system, and a power distributor as described in claim 1 or 2, wherein the power distributor is arranged in the high-voltage cabinet, and the high-voltage cabinet is also provided with an air switch and a leakage protection device matching the power consumption system, and the air switch and the leakage protection device are connected to the power consumption system via wires.

4. The intelligent power dispatching system according to claim 3, characterized in that: The power distributor is movably arranged in the high-voltage cabinet via a slide rail.

5. A power distribution method, applied to the power divider as claimed in claim 1 or 2, characterized in that: The power distribution method includes a power-off control method and a power-on control method; The power-off control method is applied when n power-consuming units are all powered on, and the power-off control method is: multiple power-off control current detections are performed on the incoming current value of the power system: when the p1th power-off control current detection is performed, if the incoming current value of the power system detected is greater than the current setting value, the first power unit is controlled to be powered off; when the p2th power-off control current detection is performed, if the incoming current value of the power system detected is greater than the current setting value, the second power unit is controlled to be powered off; and so on, when the pth power-off control current detection is performed n When the current value detected by the power-off control is greater than the current setting value, the power-off of the nth power unit is controlled; p1<p2<…<p n ; If the p i If the incoming current value of the power system detected during the current detection for the second power-off control is less than or equal to the current setting value or all the power units are powered off, the method will be jumped to the power-on control method, p i = p1+1 or p i =p2+1 or… or p i =p n-1 +1; The power-on control method is applied when the m-way power-using element is powered off, 1≤m≤n, and the power-on control method is: The m power-off power units are arranged into a queue, and each power unit in the queue is selected in sequence as a detection object to perform power-on control current detection on the incoming current value of the power system: when the power unit with the largest number in the queue is selected as the detection object for power-on control current detection, if the detected incoming current value of the power system meets the power-on condition of the power unit with the largest number in the queue, then after controlling the power unit with the largest number in the queue to be powered on, the power unit with the largest number is deleted from the queue to update the queue, and the power-on control method is re-executed, otherwise the power unit with the second largest number in the queue is selected as the detection object for power-on control current detection; when the power unit with the second largest number in the queue is selected as the detection object for power-on control current detection, if the detected incoming current value of the power system meets the power-on condition of the power unit with the second largest number in the queue. If the power-on condition is met, then after the second largest power unit in the queue is powered on, the second largest power unit is deleted from the queue to update the queue, and the power-on control method is re-executed, otherwise the third largest power unit in the queue is selected as the detection object to perform power-on control current detection; by analogy, when the smallest power unit in the queue is selected as the detection object to perform power-on control current detection, if the detected incoming current value of the power system meets the power-on condition of the smallest power unit in the queue, then after the smallest power unit in the queue is powered on, the smallest power unit is deleted from the queue to update the queue, and the power-on control method is re-executed, otherwise the largest power unit in the queue is selected as the detection object to perform power-on control current detection to realize the cycle, and the power-off control method is returned after the queue is empty.

6. The power distribution method according to claim 5, characterized in that: In the power-on control method, the power-on condition of the power-consuming unit with the largest number s in the queue is: the judgment current value corresponding to the power-consuming unit with the largest number s in the queue is less than or equal to the current setting value, 1≤s≤m; The calculation method of the judgment current value corresponding to the power unit with the sth largest number in the queue is as follows: obtain the incoming current value of the power system detected during the last power-off control current detection before the power unit with the sth largest number in the queue was powered off as the first current value, obtain the incoming current value of the power system detected during the first power-off control current detection after the power unit with the sth largest number in the queue was powered off as the second current value, obtain the incoming current value of the power system detected when the power unit with the sth largest number in the queue was selected as the detection object and the power-on control current detection was performed as the third current value, then the judgment current value corresponding to the power unit with the sth largest number in the queue is equal to the difference between the first current value and the second current value and the sum of the third current value.

7. The power distribution method according to claim 5, characterized in that: In the power-off control method, the time interval between two adjacent power-off control current detections is a first time interval, and in the power-on control method, the time interval between two adjacent power-on control current detections is a second time interval, and the second time interval is longer than the first time interval.

8. The power distribution method according to claim 7, characterized in that: The first time interval is 0.1-10 seconds, and the second time interval is 10 seconds to 30 minutes.

9. The power distribution method according to claim 5, characterized in that: In the power-on control method, if the incoming current value of the power system detected during the power-on control current detection is greater than the current setting value and the duration reaches a preset time threshold, all the power units are forced to be powered off; if the incoming current value of the power system detected during the power-on control current detection is 0, all the power units are forced to be powered on.

10. The power distribution method according to claim 9, characterized in that: The time threshold is from 30 seconds to 1 hour.

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