Spliced Screen Scheme of Power Dispatching Center

From the regular display of the dispatching screen, the access responsibility of the safety zone, the backstepping of the screen wall and the acceptance caliber of the patchwork seam, to the continuous operation, the seat authority, the customization ability of the transformation cutover and the source factory, the landing judgment of the splicing screen of the power dispatching center is given.

The most expensive mistake in the splicing screen scheme of the power dispatching center is not that the screen is too expensive to buy, but that "a node on the wiring diagram is cut off by the patchwork, and the dispatcher looks less".The large screen in the dispatching hall is the "dashboard" for power grid operation-wiring diagram, power flow data and over-limit alarm must be read clearly at a glance, while the power monitoring system is restricted by the "Regulations on Safety Protection of Power Monitoring System" (Decree No. 27 of 2024) and is protected according to the 16-character principle of "safety partition, network specialization, horizontal isolation and vertical certification. The screen wall scheme cannot be planned separately from the security partition architecture, nor can the general expression "support XX road access" replace the capacity verification of the sub-link. More importantly, the screen wall of the dispatch hall is not a "display device",Operator interface between dispatcher and grid: Which line's trend exceeds the limit, which factory station's alarm pops up, and whether the layout can be restored with one click during shift change determine whether this screen is "useful" or "furnished". This article is carried out in the order of "always showing the picture → safe partition access → screen wall reverse pushing → capacity sub-link → continuous operation → seat authority → transformation cutover → acceptance quotation". Each link gives the starting point that can be judged and the acceptance caliber that can be measured, and explainsLCD splicing screen China source factoryThe actual value of direct supply in patchwork combinations, non-standard supports and long-term spare parts.

1. the screen wall of the dispatch hall and answer "which pictures must be displayed frequently"

The layout of the screen wall in the dispatching hall cannot start with "buying a few screens", but with "where the dispatcher is, what content to see, and what must jump out when abnormal. The power grid implements unified dispatching and hierarchical management. The dispatching organization is divided into five levels. The daily core picture of the local/county-level hall usually includes five categories.

2. security partition is a hard prerequisite: two lists, no cross-zone control scheme is provided.

Article 4 of Decree No. 27 divides the protection area of the power monitoring systemProduction Control Area (Safety I/II)andManagement Information Area (Safety Area III/IV)Article 9 requires that the connection between the production control area and the management information area and the safe access area shall be equipped with a horizontal one-way safety isolation device for electric power. The screen wall scheme must be based on the access structure approved by the owner,Cross-zone connection scheme or default cross-zone connection scheme is not provided。

Reverse thrust of 3. screen wall: calculate the number of rows and columns from the net size of the hall and the line of sight of the seat.

The size of the screen wall of the dispatching hall is determined by the wall conditions of the hall, the layout of seats and the number of frequently displayed images. An operational starting point is:

Take a 55-inch single screen (appearance about 1222mm × 696mm) as an example. A local transfer hall can have a clear wall width of about 7.5 meters and a clear height of about 3.5 meters, with 50cm cabinet space reserved at the bottom, 30cm reserved on both sides and 20cm reserved at the top: the usable wall width is about 6.6 meters, 6.6 ÷ 1.222 ≈ 5.4, take5 columns; Available height is about 2.8 meters, 2.8 ÷ 0.696 ≈ 4.0, take4 lines. The candidate size is 5 x 4 for a total of 20 blocks. If the nearest seat is too close to cause the elevation angle to be too large, or the farthest seat cannot see the wiring diagram label clearly, it is necessary to reduce the number of rows, increase the size of a single screen or adjust the installation height of the screen wall. In the actual project of the industry, 55-inch 6-row 5-column, 46-inch 5 x 10 and other configurations have appeared, specific to the hall conditions.

Patchwork: divided into "nominal caliber" and "installation acceptance caliber"

Patchwork in procurement documents is usuallyNominal caliber(such as double-sided flat seam ≤ 3.5mm), but the actual installation of the flat seam by the bracket accuracy, leveling process and screen body tolerance, may be different from the nominal value.Acceptance caliberIt should be clear whether the allowable deviation of the patchwork width, the uniformity of the patchwork (whether the width of each patchwork is consistent), and whether the key picture (wiring diagram node, line label) is interrupted by the patchwork. When selecting the type, it is not necessary to blindly pursue the narrowest patchwork seam, but in the main screen area where the wiring diagram is displayed across the screen, the patchwork seam should be evaluated first and below 1.8mm; The data area and video area can be relaxed according to the budget.

4. capacity sub-link: graphics acquisition, video decoding, windowing, back control, can not be combined into a sentence

The capacity requirements of the dispatching hall must be divided into links, and "XX routes supported" cannot be written in general terms ". The capacity caliber of the four links is different, and mixing together will cause one side to become a bottleneck.

5. continuous operation with failover: 7 × 24 is part nominal, not system without single point

"Support 7 × 24" usually refers to the continuous operation of the screen body or components, which does not mean that the entire display system has no single point of failure. The dispatching hall needs to be checked by links: which pictures are affected by screen failure, processing equipment failure, signal link failure and power supply failure, what are the recovery methods, and how long is the expected recovery time.

Attention should be paid to the screen body of the dispatching hall.Applicable conditions for long-term static images: The wiring diagram and the fixed data window may display the same picture for a long time. When selecting the model, confirm the anti-burning/residual management capability of the screen body, and require the supplier to provide reference cases of similar static display scenarios. The brightness/color calibration process after replacement of spare parts should also be written into the contract-if the color difference of the new screen is obvious, the consistency of the whole wall will be destroyed.

6. seat permissions: who can go on the screen, who pushes, who controls back, list

The dispatching hall has dense seats and many signals, and the permission design is more complicated than that of the ordinary monitoring center. The core issues are:What can dispatchers, automated operations, information communications, and leaders do?。

Permission design should be documented in the project plan, rather than agreed upon verbally. Actual measurement during acceptance: whether the scope of different roles can be seen and operated after logging in conforms to the matrix; Whether the conflict handling rules (first come, first served/priority ruling/host agent control) when multiple agents are pushed at the same time take effect; Whether the operation log completely records "who pushed which signal to which window at what time". The call-up time of the consultation plan should also be measured-how long will it take from the initiation of the consultation to the completion of the picture according to the layout of the plan.

7. transformation cutover: the old screen is not to be dismantled or not to be dismantled by the owner, and the cutover condition does not write "zero shutdown"

Many dispatching halls have existing screen walls (analog screens, DLP and LED). Whether to retain the existing screen is determined by the owner according to the business,Do not write "inevitable demolition". This paper discussesShow LinkThe transformation does not involve the transformation of the main station, protection or remote business channel by default.

8. Acceptance, Quotation and Source Plant Value

Acceptance: According to the constant display list, scene by scene, do not light up the whole machine.

The acceptance shall use the actual picture authorized by the owner, and test the scene by scene according to the frequently displayed list in chapter 1: the readability of the wiring diagram at the farthest/lateral seat, whether the alarm pops up in time and will not be released by the round patrol, the picture organization time called out by the consultation plan, whether the disconnection/freezing prompt is visible, and whether the one-key recovery of shift change returns to the standard layout.Do not do "acceptance when the whole wall is lit"-- Normal lighting does not mean that the dispatcher can use it.

Quotation: itemized to screen, processing, seating, cutover and spare parts

The quotation for the dispatching hall project shall be itemized: screen body (model, panel source and grade, patchwork nominal value), graphics acquisition and video decoding equipment, splicing processor and window opening capability, seating and authority system, installation structure (bracket/cabinet/non-standard customization), heat dissipation and environment matching, integration and cutover service, spare parts and quality assurance. Beware of "package price" to cover up short board items-for example, the screen price is low, but the graphics acquisition channel is insufficient or the seat back control channel is insufficient, and the later addition will significantly push up the total cost.

9. common mistakes

• Myth 1: Separate the screen wall scheme and the safety partition. The zoning architecture of Order 27 is a hard premise. Where the signal comes from, through what isolation, who is responsible for access, must be confirmed with the owner at the scheme stage, can not first set the screen and then "find a way to connect".
• Myth 2: Replace sub-link capacity with "support XX road. Graphics acquisition, video decoding, windowing and return control are four links with different capacities. The general "support XX road" cannot judge which link will become the bottleneck.
• Misunderstanding 3: patchwork only looks at millimeters, not interruptions. If the 0.88mm patchwork seam cuts through the key nodes of the wiring diagram, the impact may be greater than 3.5mm and fall on the blank area. The acceptance shall measure whether the key picture is cut by the patchwork, not only the width of the patchwork.
• Myth 4: Take "7 × 24" as a system with no single point of failure. Component nominal is not equal to system reliability. The sub-link verification screen, processing, signal, power supply failure impact and recovery means are more meaningful than a sentence "support 7 × 24.
• Myth 5: The transformation project promises "zero downtime". The cutover window and fallback conditions are to be determined by the Owner. Instead of a commitment to "no business impact", the programme should write "executed by the confirmed window".
• Myth 6: Think the "source factory" is just cheap. The value of the power dispatch project is customized in the combination of stitching, non-standard brackets and long-term spare parts. Check the factory qualification and panel source when evaluating, not just look at the price.

10. FAQ

XI. Conclusion