267 / 2018-09-25 01:18:00

Novel and Necessary Structure of Overall Online Monitoring for Power System – Ground Layer

overall structure,on-line monitoring,power system,ground layer

Abstract- This is the second paper of our consecutive teamwork on overall on-line monitoring for power system. The first paper was published at CICED 2018 with title of Novel and Necessary Structure of Overall On-line Monitoring for Power System. Till the submission of this essay, oral presentation at CICED was done and a novel three-lay-structure was introduced, as was shown in the images beneath.



The first paper focused on the novel characteristic of object-oriented on-line monitoring system while this second paper would describe the first (fundamental) layer—the ground layer—in detail.

This paper, briefly, would go through a statistical background of current on-line monitoring system/equipment, which was not included in the first paper. A simple retrospect of the three-layer structure would be necessary: the first (fundamental) layer would be ground-layer, which defined basics and necessities of on-line monitoring system; the second layer would be relation-layer, which described relationships between power system/equipment and on-line monitoring system/equipment; the third (application) layer would be junction-layer, which devised the detailed on-line monitoring applications as junctions of virtual high-dimensional grids, this particular model was object-oriented.

There were seven sections within ground layer:
G-1. Terms and definitions;
G-2. General specification;
G-3. Structure;
G-4. Measurement;
G-5. Interface;
G-6. Evaluation;
G-7. Stabilization;

Introduce the intension and extension of these seven sections was the elementary purpose of this paper.

We summarized one or two words to name each section, however, the intensions of these sections were more abundant: measurement section (G-4) would include the measurement system, measuring value transfer, measuring chain and discussion of uncertainty of measurement; interface section (G-5) would include information model, interface and interoperability; evaluation section (G-6) would include the principle and instructive method for acceptance inspection and evaluation.

Illustration of the characteristics, logical relationships and mathematical relationships of the seven sections within ground layer was the core content of this paper.

Our team tried to utilize seven sections within ground layer to set the boundaries of the on-line monitoring system, therefore each section would possess prominent characteristics. These characteristics would reveal the substantial differences between current on-line monitoring and novel on-line monitoring, which would be worthy of reference.

Similar to characteristics, logical relationships within ground layer were also first proposed in this paper. Logical relationships would also serve as the foundation of mathematical relationships within ground layer and a significant reference source for relation layer.

With characteristics and logical relationships, we abstracted a neat mathematical explanation model for ground layer as was shown in Table I.

Table. I was a simple explanation of ground layer from mathematical perspective and more detailed mathematical explanation was included in the paper.

As were known to some readers, our teamwork was part of an IEC standard project, thus the final part of this paper would include:

a. a comparison between this novel on-line monitoring and current IEC on-line monitoring (and/or relative system/network);
b. a discussion of the compatibility of this novel on-line monitoring standard system and current IEC standards about on-line monitoring (and/or relative system/network).

Finally, we set a serial of logical and mathematical boundaries for this novel on-line monitoring structure. Beyond these boundaries, we generalized some vistas about this novel on-line monitoring structure and focused on the application of ground layer:

a. these seven sections were necessary components for most industrial systems, hopefully, could become a prototype for other (IEC) standard system in different industries.

b. Though high dimensional grid model was utilized in junction layer, difference in the mathematic tools in other layers would not affect the characteristics, logical relationships and mathematical relationships within ground layer, i.e. the structure of ground layer would be relatively stable.

c. mathematical explanations, as was given in Table I, might be improved with more advanced mathematical tools when necessary.

At last, we summarized our experiences and failures of our teamwork and tried to give our conclusions:

a. different sections of fundamental layers of major industrial systems should possess explicit mathematical meanings;

b. characteristics, logical relationships and mathematical relationships within fundamental layers were necessary for similar major industrial systems;

c. logical/mathematical boundaries were necessary for fundamental layers of industrial systems, otherwise the range and destination of the system would be blurry.