Load Shedding Wireless Access via Segmented Network
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Solution Overview
Problem
Existing accurate load shedding systems face high investment costs and maintenance difficulties due to the extensive use of optical fibers for connecting control terminals to substation access apparatuses, especially in scenarios with dispersed user points and complex environments.
Innovation Solution
Implementing a power-dedicated wireless network that directly connects control terminals with wireless access devices, reducing the need for optical fiber connections and simplifying maintenance through a system comprising a control master station layer, control substation layer, and terminal user access layer with specific communication protocols and devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical fibers are used to connect control terminals to substation access apparatuses, then communication reliability is improved, but system investment cost increases and maintenance difficulty increases
Solution Approach 1:
The system divides the communication network into two segments: the control substation layer uses optical fiber connections for high reliability, while the terminal user access layer uses wireless communication for cost-effectiveness. This segmentation allows each layer to use the most appropriate communication technology for its specific requirements.
Solution Approach 2:
A wireless access device is introduced as an intermediary between the control terminal and the substation access apparatus. This device receives control instructions from the substation via optical fiber and forwards them wirelessly to control terminals, bridging the gap between reliable wired communication and cost-effective wireless access.
2Reliability
If optical fibers are used to connect control terminals to substation access apparatuses, then communication reliability is improved, but maintenance difficulty increases
Solution Approach 1:
The communication system is segmented such that the complex optical fiber infrastructure is confined to the control substation layer, while the terminal access layer uses simple wireless communication. This reduces maintenance complexity at the numerous dispersed terminal locations.
Solution Approach 2:
The wireless access device serves as a maintenance intermediary by consolidating the optical fiber connection points at the substation level. This means that fiber maintenance is centralized at easily accessible substation locations rather than requiring access to numerous dispersed terminal points.
3Ease of manufacture
If wireless network is used to connect control terminals, then system investment cost decreases and maintenance ease improves, but communication reliability may be compromised
Solution Approach 1:
The system segments the communication architecture so that the critical control substation layer uses reliable optical fiber connections, while the access layer uses cost-effective wireless technology. This ensures that the most reliable connection type is used where it matters most for system control.
Solution Approach 2:
The wireless access device acts as a mediator that ensures reliable communication by receiving instructions through the reliable optical fiber channel from the substation and then transmitting them via wireless means to terminals, thereby transferring the reliability requirement from the wireless segment to the wired segment.
Data Source
AI summary
Provided is an accurate load shedding system and method based on a power-dedicated wireless network. The system includes: a control master station layer, a control substation layer and a terminal user access layer. The control master station layer includes a control master station apparatus and an optical/E1 conversion device. The control substation layer includes an optical/E1 conversion device, a control substation apparatus and a wireless access device. The terminal user access layer includes a wireless core network, a base station and a control terminal. The wireless access device is connected to the wireless core network through Ethernet. The wireless core network is connected with the base station through an optical fiber. The control terminal is connected to a wireless network of the base station through customer premise equipment (CPE).