Design method for controlling three-phase voltage balance based on intelligent illumination

Abstract

The invention discloses a design method for controlling three-phase voltage balance based on intelligent illumination, and relates to the technical field of hydroelectric and hydraulic engineering, and the design method comprises the steps: arranging a lamp; a lamp power supply loop is distributed, three single-phase loops L1, L2 and L3 are arranged in each lighting box and correspond to six columns of lamps, nine columns form a cycle, and the arrangement sequence is L1, L2, L3, L2, L1, L1, L3, L3 and L2; a switch driver is arranged at the lower opening of the miniature circuit breaker corresponding to each power supply loop in the lighting box, and each power supply loop is divided into two groups for lighting control. According to the method, spatial arrangement of the lamps, uniform distribution of the lighting power supply network and flexible combination of the power supply loops form matrix connection in a three-dimensional space, intelligent management of the lighting equipment of the underground main power house of the hydropower station is achieved, three-phase balance of the power of the lighting loops is achieved, the voltage is kept stable, and the working efficiency is improved. And the service life of lighting system electrical equipment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of hydropower and water conservancy engineering, and in particular to a design method for three-phase voltage balance based on intelligent lighting control. Background Art

[0002] The equipment layout characteristics of the underground powerhouse area of ​​the hydropower station are centered on the unit, and related auxiliary equipment and electrical cabinets are arranged around the pier and near the upstream and downstream walls. The floor clearance is high, generally reaching 16-19m, and the longitudinal dimension is long, generally more than 100m. The working lighting lamps mainly use high-power deep-light lamps, and the ceiling is installed above the plant. The number of rows and columns of lamps is large. The traditional loop control method basically relies on the miniature circuit breaker in the lighting box. The loop distribution is relatively rigid. The control is achieved by the personnel manually disconnecting the miniature circuit breaker in the lighting box or the local panel switch. The lamp status basically adopts the constant light type. At present, the operation and management of smart hydropower stations adopts the method of unmanned or understaffed operation. The traditional method will cause a lot of waste of electricity and loss of lamp life. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a design method for three-phase voltage balance based on intelligent lighting control.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A design method for intelligent lighting of underground powerhouses in a hydropower station comprises the following steps:

[0006] Step 1: Arrange the lamps according to the space size, illumination requirements, installation conditions, etc.

[0007] Step 2: Allocate the power supply circuits for the lamps according to the arrangement of the lamps; wherein, three single-phase circuits are set in each lighting box, and two columns of lamps correspond to one single-phase circuit in the lighting box, namely L1, L2, and L3, corresponding to 6 columns of lamps; wherein, 9 columns form a cycle, and the arrangement order is L1, L2, L3, L2, L1, L1, L3, L3, L2;

[0008] Step 3: A switch driver is installed at the lower port of the miniature circuit breaker corresponding to each power supply circuit in the lighting box, and each phase power supply circuit is divided into two groups for lighting control, wherein each group corresponds to a column of lamps.

[0009] Based on the above technical solution, further, in step 1, the number of columns of lamps is an integer multiple of 6.

[0010] Based on the above technical solution, further, in step 2, the equally spaced lamps are respectively set into three different combinations, and each combination contains 1 / 3 of the lamps.

[0011] Based on the above technical solution, further, in step 2, according to the arrangement order and the circulation situation, the 1st, 4th, 7th... columns are connected to the L1 phase, the 2nd, 5th, 8th... columns are connected to the L2 phase, and the 3rd, 6th, 9th... columns are connected to the L3 phase.

[0012] Based on the above technical solution, further, each adjacent 4 rows of lamps cover a working area of ​​a unit section.

[0013] Based on the above technical solution, further, in step 3, the lamp arrangement is to divide each power supply circuit into two columns of lamps, a total of six columns, each column has four lamps, and the four lamps in each column serve as a group of control units. Each column of lamps corresponds to a control module for independent start and stop.

[0014] Based on the above technical solution, further, in step 3, the switch driver arbitrarily divides the power supply circuit into multiple groups, each group receives instructions separately and starts and stops independently; or, issues instructions to multiple groups at the same time, and starts and stops at the same time.

[0015] Based on the above technical solution, further, each switch driver is connected to each other through communication, uploaded to the intelligent lighting control system server, and managed and controlled by the server to issue corresponding instructions.

[0016] Based on the above technical solution, further, in step 3, each power supply circuit corresponding to the switch driver has a one-to-one corresponding address, and the address of the lamp to be lit is input in the corresponding mode to light the required lamp.

[0017] Based on the above technical solution, further, the setting conditions at least include space size, illumination requirements and installation conditions.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The present invention uses an intelligent lighting control system to solve the problem that the lighting equipment in the underground powerhouse of a hydropower station must be switched on and off on site and the control circuit is inflexible. The number of matching lamps can be switched according to the working status, saving energy, extending the service life of lamps, reducing the number of maintenance times, and reducing the replacement frequency; it can be operated on site or remotely controlled; it realizes the selection of different lighting modes according to the operation and maintenance habits of the power station, the power station tasks and the unit status (normal operation, maintenance, accidents, inspection, visit and study), cleaning, maintenance, replacement of lighting equipment, etc., including at least the following six basic lighting modes: only a single row of lamps is lit or turned off; the lamps of a single unit section are lit or turned off; any combination of lamps of two unit sections or a group of unit sections are selected to light up or turn off together; Light up or close each area according to the progress of the project construction; only light up 1 / 3 of the lamps in the energy-saving state, and the other two groups of 1 / 3 of the lamps can be turned on alternately after a period of time through the intelligent lighting system; light up all the lamps in the main plant when necessary for visits and inspections; and use the software-defined operation interface of the intelligent lighting control system to more simply realize the start and stop combination modes of various lamps, without the need for personnel to rely on memory to identify and operate the circuits that need to be started and stopped; realize independent control, positioning, fault detection and background alarm of a single row of lamps without affecting the status of other rows of lamps, minimize the scope of locked faults, greatly facilitate operation and maintenance management, simplify the tedious work of regular inspection of hundreds of lamps in the hydropower station, and save a lot of manpower.

[0020] (2) The present invention also utilizes a method of adding a switch driver inside the lighting box to split the lighting box feeder circuit into smaller parts without increasing the investment in miniature circuit breakers, thereby facilitating designers and power station operation and maintenance managers to more autonomously adjust the combination of lamp start and stop; by controlling the switch driver, frequent operation of the miniature circuit breaker is avoided, thereby extending the life of the miniature circuit breaker.

[0021] (3) If the three-phase of the lighting system in the present invention is unbalanced, it will lead to the need for larger cross-section wires to bear unbalanced power, reduce transformer utilization, increase neutral line current and line loss, and affect power supply quality. In addition, if the three-phase voltage is unbalanced, some lamps may be subjected to too high or too low voltage. If the lamps work at a voltage higher than the rated voltage for a long time, it will accelerate the aging of the lamps and shorten the service life of the lamps. The voltage imbalance will also make the luminous intensity of the lamps inconsistent, resulting in uneven illumination in the lighting area, affecting the visual effect and working environment. The present invention solves the above problems well by forming a matrix connection in three-dimensional space through the spatial arrangement of lamps, the uniform distribution of lighting power supply networks, and the flexible combination of intelligent lighting control circuits, and realizes that the lighting circuit is three-phase voltage balanced in any of the six basic lighting modes. It also realizes the intelligent management of the operation, maintenance and energy saving of the lighting equipment in the underground main powerhouse of the hydropower station, and realizes the three-phase balance of the lighting circuit power, maintains voltage stability, and prolongs the life of the electrical equipment of the lighting system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a topological diagram of the lamp arrangement, power supply circuit and lighting control circuit matrix connection in the present invention.

[0023] Figure 2 Schematic diagram of normal lighting wiring in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention is further described and illustrated below in conjunction with the accompanying drawings and specific embodiments. The technical features of each embodiment of the present invention can be combined accordingly without conflicting with each other.

[0025] In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the specific implementation mode of the present invention is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. The technical features in each embodiment of the present invention can be combined accordingly without conflicting with each other.

[0026] In the description of the present invention, it is to be understood that when an element is considered to be "connected" to another element, it may be directly connected to the other element or indirectly connected, that is, there are intermediate elements. On the contrary, when an element is said to be "directly" connected to another element, there are no intermediate elements.

[0027] Example 1

[0028] Combination Figure 1 and Figure 2 As shown, Figure 1 The rectangular box in the middle indicates that each unit covers 4 rows of lamps, of which the installation field covers 12 rows of lamps, and the areas of each unit section can be started and stopped independently; Figure 2 It reflects the topological relationship between the spatial arrangement of lamps, the uniform distribution of three-phase power supply of the circuit, and the flexible matching of the intelligent lighting control circuit. It is a matrix connection method constructed by intelligent lighting control system under spatial conditions. Figure 2 The middle left side is the schematic diagram of the normal lighting box No. 1 on the generator floor of the main powerhouse. Figure 2 The middle right side is a schematic diagram of the 2# normal lighting box of the main powerhouse generator layer, N represents the neutral line, and PE represents the ground line. Specifically, this embodiment provides a design method for three-phase voltage balance based on intelligent lighting control. This method is mainly used for lighting control of underground powerhouses of hydropower stations, and specifically includes the following steps:

[0029] Step 1, set conditions such as space size, illumination requirements, and installation conditions, and arrange lamps; in this embodiment, the number of columns of the lamps is an integer multiple of 6. Specifically, the designer locates the position of the lamps on the drawing; further, since the top arch of the generator layer is mostly a steel grid decoration scheme, the grid has a fixed spacing, and the arrangement of the lamps must meet the illumination requirements of the corresponding specifications and must be evenly arranged in accordance with the spacing of the grid. It should be further explained that first, it is necessary to ensure that all circuits are evenly distributed to the three phases, which requires a multiple of 3. At the same time, in order to ensure that the circuit distribution in the lighting distribution box is flexible and does not waste the configuration of the miniature circuit breaker, it is more appropriate to set the solution of one circuit (one miniature circuit breaker) for every two columns, that is, a multiple of 2. Considering the requirements of these two conditions, it is necessary to meet the condition of being a multiple of 6.

[0030] Step 2: Allocate the power supply circuit for the lamps according to the arrangement of the lamps; specifically, a three-phase circuit is set in the lighting box, and every two columns of lamps correspond to a phase circuit in the lighting box; 1 / 3 of the lamps with equal spacing are set to three different phases of L1, L2, and L3 respectively; and every four adjacent columns of lamps cover a working area of ​​a unit section. Furthermore, the 1 / 3 lamps with equal spacing can be understood as: the lamps at the distance 1 / 4 / 7... are a group of L1, L2, and L3 phases; the lamps at the distance 2 / 5 / 8... are a group of L1, L2, and L3 phases; the lamps at the distance 3 / 6 / 9... are a group of L1, L2, and L3 phases. Through the programming of the intelligent lighting control system software, the drivers connected to these lamps can receive instructions at the same time, so that when 1 / 3 of the lamps are lit, these lamps are started. In this embodiment, in order to achieve the effect of three-phase voltage balance, the arrangement order must be L1, L2, L3, L2, L1, L1, L3, L3, L2, and 9 columns form a cycle. The 1st, 4th, 7th, ... columns are connected to the L1 phase, the 2nd, 5th, 8th, ... columns are connected to the L2 phase, the 3rd, 6th, 9th, ... columns are connected to the L3 phase, and so on.

[0031] Step 3: Install a switch driver at the bottom of the miniature circuit breaker in the lighting box. The switch driver can select a 6-way intelligent lighting driver to divide each power supply circuit into two groups. This structural setting can save the cost of setting up a miniature circuit breaker and flexibly control each power supply circuit.

[0032] In this embodiment, each power supply circuit corresponding to the switch driver has its own address, which is equivalent to each column of lamps having its own address. Through the intelligent lighting control system software, programming is performed in the background, and the address of the lamp to be lit is input in the corresponding mode. When the switch module in the intelligent lighting control system receives the mode instruction, it will send a command to the corresponding driver to drive it to light the required lamps.

[0033] The specific operation process is as follows: In the intelligent lighting control system software platform, select the "New Mode" button, name it "1st column of lamps", "2nd column of lamps" and so on, enter the addresses of the corresponding columns of lamps, click "Save", and complete the program editing of the single column lamp lighting or off mode; select the "New Mode" button, name it "1st unit section lamps", "2nd unit section lamps" and so on, enter the addresses of "1st / 2 / 3 / 4th column", "5th / 6 / 7 / 8th column" and so on, click "Save", and complete the program editing of the single unit section lighting or off lamp mode; select the "New Mode" button, name it "First phase project lamps", "Installation site lamps", "Second phase project lamps", enter the addresses of "1st to 19th columns", "19th to 30th columns", "30th to 48th columns" and click "Save" to complete the program editing of the lighting or off lamp mode by area; select the "New Mode" button, name it "First combination" 1 / 3 lamps", "Second combination 1 / 3 lamps", "The third combination 1 / 3 lamps", enter "1st, 4th, 7th, 10th, 13th, 16th, 19th, 22nd, 25th, 28th, 31st, 34th, 37th, 40th, 43rd, 46th column", "2nd, 5th, 8th, 11th, 14th, 17th, 20th, 23rd, 26th, 29th, 32nd, 35th, 38th, 41st, 44th, 47th column", "3rd, 6th, 9th, 12th, 15th, 18th, 21st, 24th, 27th, 30th, 33rd, 36th, 39th, 42nd, 45th, 48th column is the third group" Select the address, click "Save", and complete the program editing of the mode of lighting only 1 / 3 of the lamps in the energy-saving state; select the "New Mode" button, name it "All Lamps", enter the address of all the lamps in the column, and click "Save" to complete the program editing of the mode of lighting or closing all lamps. It should be noted that the intelligent lighting control system is a control terminal device, and a computer can be selected; as a carrier for the execution and implementation of the design method, it has built-in memory, various operation modules and other structures, which will not be described in detail here.

[0034] Reference Figure 1As shown in Table 1 and Table 2, the power supply circuit is L1, L2, and L3 lines representing different phases led out of the lighting box. The lamp arrangement is to divide each of the above three power supply circuits into two columns of lamps, a total of six columns, each column has 4 lamps, and the 4 lamps in each column are used as a group of control units. Each column of lamps corresponds to an action unit in a 6-way intelligent lighting driver and can be started and stopped independently. Specifically, 1 / 5 / 6 / 10 / 14 / 15 / 19 / 23 / 24 / 28 / 32 / 33 / 37 / 41 / 42 / 46 is L1 phase, 2 / 4 / 9 / 11 / 13 / 18 / 20 / 22 / 27 / 29 / 31 / 36 / 38 / 40 / 45 / 47 is L2 phase, 3 / 7 / 8 / 12 / 16 / 17 / 21 / 25 / 26 / 30 / 34 / 35 / 39 / 43 / 44 / 48 are arranged backwards in the order of L3 phase. When 1 / 3 of the lamps are turned on, there can be three groups: the 1st, 4th, 7th, 10th, 13th, 16th, 19th, 22nd, 25th, 28th, 31st, 34th, 37th, 40th, 43rd, 46th are the first group; the 2nd, 5th, 8th, 11th, 14th, 17th, 20th, 23rd, 26th, 29th, 32nd, 35th, 38th, 41st, 44th, 47th are the second group; the 3rd, 6th, 9th, 12th, 15th, 18th, 21st, 24th, 27th, 30th, 33rd, 36th, 39th, 42nd, 45th, 48th are the third group; that is, the intervals are uniform and the three-phase voltage is balanced. When turning on the lamps of each unit section, the corresponding four columns of lamps above can be turned on by one key. When turning on 1 / 2 of the lamps in the whole plant, it can also be achieved by one key. It should be noted that in Table 1, columns 1-9 are one cycle, columns 10-18 are one cycle, columns 19-27 are one cycle, columns 28-36 are one cycle, and columns 37-45 are one cycle; in Table 2, each box corresponds to two groups, so the action circuit column is distinguished by -1 and -2.

[0035] Table 1

[0036] Number of columns Phase sequence Number of columns Phase sequence Number of columns Phase sequence 1 L1 17 L3 33 L1 2 L2 18 L2 34 L3 3 L3 19 L1 35 L3 4 L2 20 L2 36 L2 5 L1 21 L3 37 L1 6 L1 22 L2 38 L2 7 L3 23 L1 39 L3 8 L3 24 L1 40 L2 9 L2 25 L3 41 L1 10 L1 26 L3 42 L1 11 L2 27 L2 43 L3 12 L3 28 L1 44 L3 13 L2 29 L2 45 L2 14 L1 30 L3 46 L1 15 L1 31 L2 47 L2 16 L3 32 L1 48 L3

[0037] Table 2

[0038]

[0039]

[0040] From Table 2, we can know the final "mode effect", different mode effects, which lamp actions correspond to, and which circuits in the lighting box these lamps correspond to.

[0041] The following is a further explanation using a large pumped storage power station project that adopted this scheme as an example.

[0042] Exemplary, combined Figure 2The normal lighting wiring diagram of the motor layer 1# of a main plant is shown in the figure. A large-scale pumped storage power station project is divided into two phases, with 6 units in each phase. The length of each unit section is 24 meters. There is an installation field in the middle of the two phases, with a length of 380 meters. The generator layer of the first and second phases is designed with the installation field as a whole. The height of the generator layer is 20 meters, and the upstream and downstream span is 26.5 meters. The top arch is arranged with a steel grid, and the lamps are arranged on the steel grid with a spacing of 6 meters. The entire generator layer top arch is arranged with 4 rows of 48 lamps, and 300WLED deep lighting lamps are selected.

[0043] 8 lighting boxes are configured, each box is equipped with 3 feeder circuits, each circuit supplies two columns of lamps, and a switch driver is configured at the end of the miniature circuit breaker to divide each feeder circuit into two groups of control circuits, that is, each column of 4 lamps is a group of control units.

[0044] In some other embodiments, the control structure for implementing the design method includes:

[0045] 1. Miniature circuit breakers are installed in the lighting box to divide the lighting box into different power supply circuits, which can ensure that the voltage drop will not be too large, and the power operation between the circuits can be flexible. It can also ensure that the circuits are independent of each other and do not affect each other, ensuring the reliability of lighting power supply in the entire area.

[0046] 2. Configure the switch driver of the intelligent lighting control system at the lower port of the miniature circuit breaker to arbitrarily divide the power supply circuit into multiple groups. Each group receives instructions separately and starts and stops independently. It can also issue instructions to multiple groups at the same time and start and stop at the same time.

[0047] 3. Each switch driver is connected through a communication line and uploaded to the intelligent lighting control system server, which will centrally manage, edit logical commands, and issue instructions.

[0048] Furthermore, the method selects different lighting modes according to the operation and maintenance habits of the power station, the power station tasks and the unit status (normal operation, maintenance, accidents, inspection, visit and study), cleaning, maintenance and replacement of lighting equipment, including at least the following six basic modes: only a single row of lamps is lit or turned off; the lamps of a single unit section are lit or turned off; any combination of lamps of two unit sections or groups of unit sections are selected to be lit or turned off together; lighting or turning off by area according to the progress of the project construction; only 1 / 3 of the lamps are lit in the energy-saving state, and the other 1 / 3 of the lamps of the other two groups can be turned on alternately after a period of time set by the intelligent lighting system; all lamps in the entire main plant are lit under necessary conditions such as visits and inspections.

[0049] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A design method for three-phase voltage balance based on intelligent lighting control, characterized in that: The following steps are involved: Step 1: Arrange lamps according to the set conditions; Step 2, according to the arrangement of lamps, distribute the power supply circuits of the lamps; wherein, three single-phase power supply circuits are set in each lighting box, and two columns of lamps correspond to a single-phase power supply circuit in the lighting box, namely L1, L2, and L3, corresponding to 6 columns of lamps; wherein, 9 columns form a cycle, and the arrangement order is L1, L2, L3, L2, L1, L1, L3, L3, L2; Step 3: A switch driver is installed at the lower port of the miniature circuit breaker corresponding to each power supply circuit in the lighting box, and each phase power supply circuit is divided into two groups for lighting control.

2. A design method for three-phase voltage balance based on intelligent lighting control according to claim 1, characterized in that: In step 1, the number of columns of lamps is an integer multiple of 6.

3. The design method of three-phase voltage balance based on intelligent lighting control according to claim 1 is characterized in that: In step 2, the lamps are set into three different groups, each group contains 1 / 3 lamps.

4. The design method for three-phase voltage balance based on intelligent lighting control according to claim 1 is characterized in that: In step 2, according to the arrangement order and the circulation situation, the 1st, 4th, 7th, ... columns are connected to the L1 phase, the 2nd, 5th, 8th, ... columns are connected to the L2 phase, and the 3rd, 6th, 9th, ... columns are connected to the L3 phase.

5. The design method of three-phase voltage balance based on intelligent lighting control according to claim 1 is characterized in that: In step 2, each of four adjacent rows of lamps covers a working area of ​​a unit section.

6. A design method for three-phase voltage balance based on intelligent lighting control according to claim 5, characterized in that: In step 3, the lamp arrangement is to divide each power supply circuit into two columns of lamps, a total of 6 columns, each column has 4 lamps, and the 4 lamps in each column serve as a group of control units. Each column of lamps corresponds to a control module and is started and stopped independently.

7. A design method for three-phase voltage balance based on intelligent lighting control according to claim 6, characterized in that: In step 3, the switch driver arbitrarily divides the power supply circuit into multiple groups, each group receives instructions separately and starts and stops independently; or, issues instructions to multiple groups at the same time, and starts and stops at the same time.

8. The design method for three-phase voltage balance based on intelligent lighting control according to claim 1 is characterized in that: The switch drivers communicate with each other and are uploaded to the server of the intelligent lighting control system, which controls and issues corresponding instructions.

9. The design method for three-phase voltage balance based on intelligent lighting control according to claim 1 is characterized in that: In step 3, each power supply circuit corresponding to the switch driver has a one-to-one corresponding address, and the address of the lamp to be lit is input in the corresponding mode to light the required lamp.

10. The design method for three-phase voltage balance based on intelligent lighting control according to claim 1, characterized in that: In step 1, the setting conditions include at least space dimensions, illumination requirements, and installation conditions.

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