Ring main unit control method and control system thereof

Abstract

The invention relates to the technical field of power distribution, in particular to a ring main unit control method, which comprises the following steps: acquiring environmental parameters in a cabinet body, and generating a parameter change curve according to the change gradient of the environmental parameters; the parameter change curve is compared with a pre-stored standard change curve to obtain a comparison deviation value, when the comparison deviation exceeds a set threshold value, a driving signal is formed according to the comparison deviation value, and linkage control is conducted on the auxiliary heat dissipation unit and the main heat dissipation unit through the driving signal; the environment parameter change gradient is obtained to generate the parameter change curve, the parameter change curve is compared with the pre-stored standard change curve to obtain the comparison deviation, and when the comparison deviation exceeds the set threshold value, the driving signal is formed according to the comparison deviation value, so that the driving signal is driven to drive the motor. Linkage control is carried out on the auxiliary heat dissipation unit and the main heat dissipation unit through the driving signal, echelon cooling is realized, and a temperature field in the cabinet body is enabled to change uniformly.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution, and in particular to a ring network cabinet control method and a control system thereof. Background Art

[0002] The ring main unit is an electrical device in which a group of high-voltage switchgear is installed in a metal or non-metal insulated cabinet, or is made into an assembled interval ring main unit. As an important device in the distribution network, the ring main unit plays an important role in connecting the distribution ring network and distributing electric energy. In the daily operation of the ring main unit, the internal heat dissipation needs to be carried out. At present, the heat dissipation method of the ring main unit is through fan ventilation or natural ventilation. However, this heat dissipation method has the problem of being unable to stably control the temperature change in the ring main unit. If the temperature in the ring main unit is high or low, it is easy to cause hidden dangers in the safe operation of the equipment in the ring main unit. Therefore, the present invention studies and designs a ring main unit control method and a control system thereof. Summary of the invention

[0003] In order to solve the problems of the prior art, the present invention provides a ring main unit control method, comprising a cabinet body; A main heat dissipation unit is installed on the top of the cabinet, and at least one first vent is provided on the top of the cabinet, which is used to discharge the gas in the cabinet after being drained through the main heat dissipation unit through the pipeline. Auxiliary heat dissipation units arranged opposite to each other are installed on both sides of the cabinet, and a plurality of second vents are provided on the two side walls of the cabinet, which are used to discharge the gas in the cabinet after being drained through the auxiliary heat dissipation units through the pipeline. The ring main unit control method comprises the following steps: Step 1: Collect environmental parameters inside the cabinet, and generate a parameter change curve according to the change gradient of the environmental parameters; Step 2: Compare the parameter change curve with the pre-stored standard change curve to obtain a comparison deviation value. When the comparison deviation exceeds a set threshold, a drive signal is formed according to the comparison deviation value. The auxiliary heat dissipation unit and the main heat dissipation unit are controlled in linkage through the drive signal to achieve step-by-step cooling to ensure the stability of the cooling speed in the cabinet. Further, the step 1 specifically includes: Step 11: Obtain environmental parameters and their change gradients; Step 12, converting the environmental parameter change gradient into a voltage signal; Step 13, converting the voltage signal into a digital signal; Step 14: generating a parameter change curve according to the digital signal; Furthermore, step 2 also includes: when the comparison deviation does not exceed the set threshold, outputting a shutdown signal, and stopping the auxiliary heat dissipation unit and the main heat dissipation unit from working through the shutdown signal.

[0004] Further, when the contrast deviation exceeds a set threshold, a driving signal is formed according to the contrast deviation value, and the auxiliary heat dissipation unit and the main heat dissipation unit are controlled in linkage through the driving signal, specifically including: When the comparison deviation exceeds the set threshold, the main cooling unit is started to operate, and it is determined whether the actual temperature and cooling rate in the cabinet meet the following conditions: T 实际 ≥T 目标 -ΔT′ and ψ 实际 ≥ψ 目标 ; If it is satisfied, then every time the actual temperature is detected in the first preset detection cycle, it will satisfy: T 实际 ≥T 目标 -ΔT′, a group of cooling units in the auxiliary cooling units are started in the order of numbers; wherein, T 实际 is the actual temperature inside the cabinet, T 目标 is the set target temperature, ΔT′ is the set temperature deviation constant, ψ 实际 is the actual cooling rate, ψ 实际 is the set target cooling rate; Further, when the comparison deviation exceeds the set threshold, a driving signal is formed according to the comparison deviation value, and the auxiliary heat dissipation unit and the main heat dissipation unit are linked to each other through the driving signal, and it also includes: after each start of a group of heat dissipation units in the auxiliary heat dissipation unit, after running for a first preset interval, it is judged whether the actual temperature satisfies the first preset detection period: T 实际 ≥T 目标 -ΔT′, the auxiliary cooling unit and the main cooling unit are controlled in linkage.

[0005] Further, when the contrast deviation exceeds a set threshold, a driving signal is formed according to the contrast deviation value, and the auxiliary cooling unit and the main cooling unit are controlled in linkage through the driving signal, and further comprising: if after starting a cooling unit in the auxiliary cooling unit, when it is detected that the actual temperature satisfies: T 目标 -ΔT′<T 实际 <T 目标 -ΔT i When , the auxiliary cooling operation is maintained according to the started cooling unit, where ΔT i is the set temperature deviation constant, i=1, 2, ..., n, n is the number of groups of cooling units turned on in the auxiliary cooling unit; Alternatively, if after a cooling unit in the auxiliary cooling unit is started, the actual temperature detected each time in a second preset detection cycle satisfies: T 实际 ≤T 目标 -ΔTi When the power is on, one group of the started cooling units is turned off in the reverse order of the start sequence; Alternatively, if after starting one of the auxiliary cooling units, the actual temperature detected within the third preset detection cycle satisfies: T 实际 ≤T 目标 +ΔT″, all started cooling units are turned off, where ΔT″ is the set temperature deviation constant.

[0006] A ring main unit control system includes a memory for storing a driving program for the linkage between an auxiliary cooling unit and the main cooling unit, and a driving signal scheme required for the joint startup of the auxiliary cooling unit and the main cooling unit is written into the driving program; Collector: used to collect environmental parameters in the cabinet through the collector, and generate a parameter change curve according to the environmental parameters; A processor, connected to the collector and the memory, for comparing the parameter change curve with a pre-stored standard change curve to obtain a comparison deviation, and when the comparison deviation exceeds a set threshold, forming a driving signal according to the comparison deviation value, and controlling the auxiliary heat dissipation unit and the main heat dissipation unit in linkage through the driving signal; Beneficial effects of the present invention: The present invention generates a parameter change curve by acquiring the gradient of environmental parameter changes, compares the parameter change curve with a pre-stored standard change curve, obtains a comparison deviation, and when the comparison deviation exceeds a set threshold, forms a drive signal according to the comparison deviation value, and controls the auxiliary heat dissipation unit and the main heat dissipation unit in linkage through the drive signal to achieve step-by-step cooling, thereby ensuring the stability of the cooling speed in the cabinet and not too fast, making the temperature field in the cabinet change evenly, improving the stability of the environmental parameter changes in the cabinet, making the changes in the environmental parameters in the cabinet match the standard change curve for the normal operation of the components in the cabinet, and making the components in the cabinet operate normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 A schematic diagram of a flow chart of a ring main unit control method provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of a ring main unit control system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0008] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0009] See also Figure 1-2 ,The present invention provides a ring main unit control method, comprising a cabinet body; A main heat dissipation unit is installed on the top of the cabinet, and at least one first vent is provided on the top of the cabinet, which is used to guide the gas in the cabinet through the main heat dissipation unit through the pipeline and then discharge it; auxiliary heat dissipation units are installed on both sides of the cabinet and are arranged opposite to each other, and a plurality of second vents are provided on the two side walls of the cabinet, which are used to guide the gas in the cabinet through the auxiliary heat dissipation units through the pipeline and then discharge it; The ring main unit control method comprises the following steps: Step 1, collecting environmental parameters in the cabinet, and generating a parameter change curve according to the change gradient of the environmental parameters, specifically including: Step 11, acquiring environmental parameters and their change gradient; Step 12, converting the environmental parameter change gradient into a voltage signal; Step 13, converting the voltage signal into a digital signal; Step 14: generating a parameter change curve according to the digital signal; Step 2: compare the parameter change curve with the pre-stored standard change curve to obtain a comparison deviation value. When the comparison deviation exceeds a set threshold, a drive signal is formed according to the comparison deviation value. The auxiliary heat dissipation unit and the main heat dissipation unit are controlled in linkage through the drive signal to achieve step-by-step cooling to ensure the stability of the cooling speed in the cabinet. When the comparison deviation does not exceed the set threshold, a shutdown signal is output to stop the auxiliary heat dissipation unit and the main heat dissipation unit from working. Specifically, firstly, a database is established, the environmental parameter in the cabinet is the temperature, and the database stores the normal temperature data of the normal operation of the components in the cabinet, the temperature data is dynamic temperature data, the standard change curve generated by the normal temperature data, and the allowable deviation range between the normal temperature data and the standard change curve, that is, the set threshold; Collecting cabinet internal environment parameters through collector 202; According to the environmental parameters and their change gradients, for example, the cabinet is cooled, and the auxiliary cooling unit and the main cooling unit are controlled in linkage according to the temperature and the temperature change gradient; the fine regulation of the environmental parameters inside the cabinet can be achieved, which helps to improve the stability of the changes in the environmental parameters inside the cabinet, so that the changes in the environmental parameters inside the cabinet match the standard change curve of the normal operation of the components inside the cabinet; Among them, when the contrast deviation exceeds the set threshold, a driving signal is formed according to the contrast deviation value, and the auxiliary cooling unit and the main cooling unit are linked and controlled by the driving signal, specifically including: when the contrast deviation exceeds the set threshold, the main cooling unit is started to run, and it is judged whether the actual temperature and cooling rate in the cabinet meet: T 实际 ≥T 目标 -ΔT′ and ψ 实际 ≥ψ 目标 ; If it is satisfied, then every time the actual temperature is detected in the first preset detection cycle, it will satisfy: T 实际 ≥T 目标 -ΔT′, a group of cooling units in the auxiliary cooling units are started in the order of numbers; wherein, T 实际 is the actual temperature inside the cabinet, T 目标 is the set target temperature, ΔT′ is the set temperature deviation constant, ψ 实际 is the actual cooling rate, ψ 实际 is the set target cooling rate; Specifically, the main heat dissipation unit can be a heat pump or a fan, and a group of heat dissipation units in the auxiliary heat dissipation unit is a group of fans. This embodiment is an embodiment of heat dissipation application inside the cabinet. In practical applications, for example, the auxiliary heat dissipation unit is configured with 10 to 15 groups of heat dissipation units, and each group of auxiliary heat dissipation is 1kW. If the same opening control is performed, the heat load fluctuation of nearly 10 to 15kW in the cabinet during the auxiliary heat dissipation start and stop makes the temperature in the cabinet rise too fast, and it is also very easy to cause the auxiliary heat dissipation entry point to cause the temperature in the cabinet to fluctuate violently, increase the non-uniformity of the temperature field inside the cabinet, and affect the accuracy of temperature control in the cabinet; in the specific application of the above embodiment, the processor 203 can logically memorize the heat dissipation units of the auxiliary heat dissipation unit. For example, if the auxiliary heat dissipation unit has ten groups of heat dissipation units, the ten groups of heat dissipation units can be numbered 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10. According to the actual temperature and its cooling rate, through the above judgment conditions, the cooling units of the auxiliary cooling units are put into operation in stages, which helps to ensure the stability of the cooling change and make the changes of the environmental parameters in the cabinet match the standard change curve of the normal operation of the components in the cabinet; Wherein, when the comparison deviation exceeds the set threshold value, a driving signal is formed according to the comparison deviation value, and the auxiliary heat dissipation unit and the main heat dissipation unit are linked to each other through the driving signal, and it also includes: after each start of a group of heat dissipation units in the auxiliary heat dissipation unit, after running for a first preset interval, it is judged whether the actual temperature meets the following conditions within the first preset detection period: T 实际 ≥T 目标 -ΔT′, the auxiliary cooling unit and the main cooling unit are controlled in linkage.

[0010] Specifically, the first preset interval time can be set to 10 minutes. For example, after the first group of heat dissipation units are put into use, the first group of heat dissipation units are operated for 10 minutes, and then the actual temperature is detected to determine whether it meets the following conditions within the first preset detection period: T 实际 ≥T 目标 -ΔT′, if it is satisfied, the second group of cooling units will be further invested, and the other groups of cooling units will be deduced in the same way. By forming a constraint of the first preset interval length between the two first preset detection cycles, the cooling speed can be stabilized and not too fast, so that the temperature field in the cabinet changes evenly; Wherein, when the contrast deviation exceeds the set threshold, a driving signal is formed according to the contrast deviation value, and the auxiliary cooling unit and the main cooling unit are controlled in linkage through the driving signal, and further comprising: if after starting a cooling unit in the auxiliary cooling unit, when it is detected that the actual temperature satisfies: T 目标 -ΔT′<T 实际 <T 目标 -ΔT i When , the auxiliary cooling operation is maintained according to the started cooling unit, where ΔT i is the set temperature deviation constant, i=1, 2, ..., n, n is the number of groups of cooling units turned on in the auxiliary cooling unit; Specifically, this embodiment is to judge and control whether the auxiliary heat dissipation unit should remain in this state to dissipate heat after a group of heat dissipation units are turned on. i It can be seen that after each cooling unit is turned on, it corresponds to a ΔT i , so that its corresponding T 目标 -ΔT′<T 实际 <T 目标 -ΔT i Different, in specific applications, can be achieved by i Make specific settings to ensure that the temperature control better matches the standard temperature drop curve.

[0011] Alternatively, if after a cooling unit in the auxiliary cooling unit is started, the actual temperature detected each time during a second preset detection cycle satisfies: T 实际 ≤T 目标 -ΔT i When the power is on, one group of the started cooling units is turned off in the reverse order of the start sequence; Specifically, this embodiment is to judge and control the reverse exit of the turned-on cooling units after turning on a group of cooling units. In a specific application, after turning on a group of cooling units, the cooling rate in the cabinet is increased. As to whether the decrease amplitude of the temperature drop gradient meets the requirements, the present application determines whether the temperature drop gradient meets the requirements according to ΔT. iIt can be seen that after each cooling unit is turned on, it corresponds to a ΔT i , so that its corresponding T 实际 ≥T target - ΔT i Different, in specific applications, can be achieved by i Make specific settings to make the actual conditions and timing for each cooling unit to exit match the standard temperature drop curve; Alternatively, if after starting one of the auxiliary cooling units, the actual temperature detected within the third preset detection cycle satisfies: T 实际 ≤T 目标 +ΔT″, all started cooling units are turned off, where ΔT″ is the set temperature deviation constant.

[0012] Specifically, this embodiment controls whether all the turned-on heat dissipation units need to be switched off after a group of heat dissipation units are turned on. For example, ΔT″ can be set to 1. In a specific application, the actual temperature detected in the third preset detection period satisfies: T 实际 ≥T 目标 +ΔT″, it means that the temperature inside the cabinet is out of the control range, and it can be quickly adjusted back by shutting down all the opened cooling units; In summary, in specific applications, the above embodiments can be combined to improve the stability of heat dissipation and cooling changes in the cabinet, and comprehensively ensure that the cooling control matches the cooling standard change curve.

[0013] in, Figure 2 A schematic diagram of the structure of a ring main unit control system provided in one embodiment of the present application is shown in FIG. Figure 2 As shown, the ring main unit control system includes a memory 201, which is used to store a driver program for the auxiliary cooling unit to be linked with the main cooling unit, and writes a driving signal scheme required for the joint startup of the auxiliary cooling unit and the main cooling unit into the driver program; Collector 202: used to collect environmental parameters in the cabinet through the collector 202, and generate a parameter change curve according to the environmental parameters; The collector 202 includes a first temperature sensor, a second temperature sensor and a third temperature sensor located in the first vent, the second vent and the cabinet; the memory 201 also stores a driver for controlling the first temperature sensor, the second temperature sensor and the third temperature sensor; The first temperature sensor, the second temperature sensor and the third temperature sensor acquire temperature data in real time, transmit the acquired temperature data to the collector 202, and generate a parameter change curve according to the temperature data; The parameter variation curve is compared with a pre-stored standard variation curve to obtain a contrast deviation. When the contrast deviation exceeds a set threshold, a driving signal is generated according to the contrast deviation value, and the auxiliary heat dissipation unit and the main heat dissipation unit are controlled in linkage with each other through the driving signal. The processor 203 is connected to the collector 202 and the memory 201, and is used to compare the parameter change curve with a pre-stored standard change curve to obtain a comparison deviation. When the comparison deviation exceeds a set threshold, a driving signal is formed according to the comparison deviation value, and the auxiliary heat dissipation unit and the main heat dissipation unit are linked and controlled by the driving signal; It is worth noting that the present invention generates a parameter change curve by acquiring the gradient of environmental parameter changes, compares the parameter change curve with a pre-stored standard change curve, and obtains a comparison deviation. When the comparison deviation exceeds a set threshold, a drive signal is formed according to the comparison deviation value, and the auxiliary heat dissipation unit and the main heat dissipation unit are controlled in linkage through the drive signal to achieve step-by-step cooling and ensure the stability of the cooling speed in the cabinet; it will not be too fast, so that the temperature field in the cabinet changes evenly, improves the stability of the environmental parameter changes in the cabinet, and makes the changes in the environmental parameters in the cabinet match the standard change curve for the normal operation of the components in the cabinet, so that the components in the cabinet can operate normally.

[0014] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ring main unit control method, characterized in that: Including cabinet; A main heat dissipation unit is installed on the top of the cabinet, and at least one first vent is provided on the top of the cabinet, which is used to discharge the gas in the cabinet after being drained through the main heat dissipation unit through the pipeline. Auxiliary heat dissipation units arranged opposite to each other are installed on both sides of the cabinet, and a plurality of second vents are provided on the two side walls of the cabinet, which are used to discharge the gas in the cabinet after being drained through the auxiliary heat dissipation units through the pipeline. The ring main unit control method comprises the following steps: Step 1: Collect environmental parameters inside the cabinet, and generate a parameter change curve according to the change gradient of the environmental parameters; Step 2: compare the parameter change curve with the pre-stored standard change curve to obtain a comparison deviation value. When the comparison deviation exceeds a set threshold, a drive signal is formed according to the comparison deviation value. The auxiliary heat dissipation unit and the main heat dissipation unit are controlled in linkage through the drive signal to achieve step cooling to ensure the stability of the cooling speed in the cabinet.

2. The ring main unit control method according to claim 1, characterized in that: The step 1 specifically includes: Step 11: Obtain environmental parameters and their change gradients; Step 12, converting the environmental parameter change gradient into a voltage signal; Step 13, converting the voltage signal into a digital signal; Step 14: Generate a parameter change curve according to the digital signal.

3. The ring main unit control method according to claim 1, characterized in that: The step 1 specifically includes: step 2 also includes: when the comparison deviation does not exceed the set threshold, outputting a shutdown signal, and stopping the auxiliary heat dissipation unit and the main heat dissipation unit from working through the shutdown signal.

4. The ring main unit control method according to claim 1, characterized in that: When the contrast deviation exceeds a set threshold, a driving signal is formed according to the contrast deviation value, and the auxiliary heat dissipation unit and the main heat dissipation unit are controlled in linkage through the driving signal, specifically including: When the comparison deviation exceeds the set threshold, the main cooling unit is started to operate, and it is determined whether the actual temperature and cooling rate in the cabinet meet the following conditions: T 实际 ≥T 目标 -ΔT′ and ψ 实际 ≥ψ 目标 ; If it is satisfied, then every time the actual temperature is detected in the first preset detection cycle, it will satisfy: T 实际 ≥T 目标 -ΔT′, a group of cooling units in the auxiliary cooling units are started in the order of numbers; wherein, T 实际 is the actual temperature inside the cabinet, T 目标 is the set target temperature, ΔT′ is the set temperature deviation constant, ψ 实际 is the actual cooling rate, ψ 实际 is the set target cooling rate.

5. The ring main unit control method according to claim 4, characterized in that: When the comparison deviation exceeds the set threshold, a driving signal is formed according to the comparison deviation value, and the auxiliary heat dissipation unit and the main heat dissipation unit are controlled in linkage through the driving signal, and the method further includes: after each start of a group of heat dissipation units in the auxiliary heat dissipation unit, after running for a first preset interval time, it is determined whether the actual temperature satisfies the following conditions within the first preset detection period: T 实际 ≥T 目标 -ΔT′, the auxiliary cooling unit and the main cooling unit are controlled in linkage.

6. The ring main unit control method according to claim 5, characterized in that: When the contrast deviation exceeds the set threshold, a driving signal is formed according to the contrast deviation value, and the auxiliary cooling unit and the main cooling unit are controlled in linkage through the driving signal, and further comprising: if after starting a cooling unit in the auxiliary cooling unit, when it is detected that the actual temperature satisfies: T 目标 -ΔT′<T 实际 <T 目标 -ΔT i When , the auxiliary cooling operation is maintained according to the started cooling unit, where ΔT i is the set temperature deviation constant, i=1, 2, ..., n, n is the number of groups of cooling units turned on in the auxiliary cooling unit; Alternatively, if after a cooling unit in the auxiliary cooling unit is started, the actual temperature detected each time in a second preset detection cycle satisfies: T 实际 ≤T 目标 -ΔT i When the power is on, one group of the started cooling units is turned off in the reverse order of the start sequence; Alternatively, if after starting one of the auxiliary cooling units, the actual temperature detected within the third preset detection cycle satisfies: T 实际 ≤T 目标 +ΔT″, all started cooling units are turned off, where ΔT″ is the set temperature deviation constant.

7. A ring main unit control system using the ring main unit control method according to any one of claims 1 to 6, characterized in that: It includes a memory for storing a driving program for the auxiliary cooling unit to be linked with the main cooling unit, and writing a driving signal scheme required for the auxiliary cooling unit and the main cooling unit to be jointly started into the driving program; Collector: used to collect environmental parameters in the cabinet through the collector, and generate a parameter change curve according to the environmental parameters; A processor is connected to the collector and the memory, and is used to compare the parameter change curve with a pre-stored standard change curve to obtain a contrast deviation. When the contrast deviation exceeds a set threshold, a drive signal is formed according to the contrast deviation value, and the auxiliary heat dissipation unit and the main heat dissipation unit are linked and controlled by the drive signal.

Images