CA3187703A1

CA3187703A1 - Utility pole mounted solar panels and securing brackets

Info

Publication number: CA3187703A1
Application number: CA3187703A
Authority: CA
Inventors: Lonnie L. KORNOVICH
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-07-29
Filing date: 2015-07-28
Publication date: 2016-02-04
Also published as: CA2955629C; WO2016018952A1; EP3175548A4; CA2955629A1; EP3175548A1

Abstract

An electrical transmission system has solar electrical generation stations mounted directly to existing utility poles along a transmission line. Solar panels and securing brackets define each solar electric generation station. Each station has at least one generally East facing panel, at least one generally South facing panel, and at least one generally West facing panel. A power coupling conducts electricity generated by the solar electric generation station into the transmission lines. In one embodiment, a plurality of spacer members support the separate and distinct solar collector surfaces in a fixed position relative to the utility pole and have a plurality of clamp passages. A plurality of clamps pass through the clamp passages to guide and retain the clamps. In another embodiment, a plurality of adjustable brackets affix with the spacer members adjacent a first end and to the utility pole adjacent a second end distal to the first end.

Description

UTILITY POLE MOUNTED SOLAR PANELS AND SECURING BRACKETS
Related Applications This application is a division of Canadian Application No. 2,955,629 filed 28 July 2015 as the Canadian national phase application corresponding to International Patent Application No. PCT/US2015/042544 filed 28 July 2015.
Technical Field This invention pertains generally to electrical transmission or interconnection systems, and more particularly to such systems having plural supply circuits or sources distributed along a load circuit. In a most preferred manifestation, the present invention provides solar panels and securing brackets that may, for exemplary purposes, be mounted directly to utility poles including but not limited to power line supporting poles and light poles.
Background Art Conventional electrical power generation is achieved using extremely large generating facilities that typically produce heat through nuclear reaction or by burning combustible matter such as coal, oil, or natural gas. The heat is then used to convert water to pressurized steam, and the pressurized steam used to spin an electricity generating turbine. Next, the electricity is transmitted over great distance from this large central plant to the end user. In the transmission and distribution of electrical energy, there are many utility poles that are anchored into the earth, and power lines strung overhead between adjacent utility poles. In view of the essential nature that electricity plays in the modern world, these utility poles are almost always afforded right-of-way to allow the utility companies to access and maintain the lines.
The efficiency of modern photovoltaic cells is very high, and the cost is quite low. Furthermore, the electricity may be generated at or close to the point of consumption, which may provide lower transmission losses and greater power distribution capacity. Consequently, much opportunity exists to generate a substantial portion of electricity required for everyday use through the generation of electricity using sunlight, referred to in technical circles as solar insolation.
Unfortunately, there has always been a divide between the capability to produce power from sunlight and the desire to actually install a system.

There have been several barriers to the adoption of photovoltaic systems. One barrier is the cost of installation. Not only do the solar cells need to be purchased, but they must also be installed in a manner that allows them to withstand the vagaries of the environment. Typically this includes wind and ice loading. Even when properly designed, the solar panels may become 1 a detached in an exceptional wind storm or hurricane, perpetrating damage to the supporting structure. Furthermore, when the solar cells are mounted to an existing building, the very act of installation can and often does harm the building. For example, a roof-mounted system will have fasteners that penetrate the roof of the structure. Over time, these "holes" in the roof may develop leaks that cause far more damage than the system will return in power savings.
Consequently, the installation systems are necessarily expensive, and require expertise that in turn translates into high labor costs.
Yet another barrier has been adverse alteration to the aesthetic appearance of a building.
The panels are very difficult to incorporate into the appearance of a building, often detracting therefrom. A homeowner or commercial property owner will often forego the installation purely due to aesthetic factors.
However, a utility pole may also be used to support solar cell arrays. In this case, the photovoltaic array does not detract from the appearance of the pole and transmission line, and the utility pole is already securely anchored into the earth. US patent 8,466,581 by Kuran, also published as 2010/0327657 and entitled "System and method for utility pole distributed solar power generation," shows multiple poles with the one or more PV cells mounted on them, and provides an extensive discussion of the interface between the solar panels and the grid.
Unfortunately, the Kuran construction is very exposed, leaving the system vulnerable to wind and ice loading. Furthermore, the panels are oriented for peak power production at or around midday, and so will only produce power for a few hours each day.
In US patent 8,097,980 by Cyrus et al, entitled "Distributed solar power plant and a method of its connection to the existing power grid," another PV system using utility poles is illustrated. This patent fails to describe how the panels are mounted.
Several additional US patents and published applications illustrate solar cells coupled with poles, including 2013/0322063 by Tittle, entitled "Solar retrofit lighting system";
8,029,154 by Myer, entitled "Solar-powered light pole and LED light fixture";
and 6,060,658 by Yoshida et al, entitled "Pole having solar cells".
Other US patents and published applications,

2 illustrate PV panels used to power a light on the pole or other somewhat less relevant concepts, but that nevertheless represent the state of the industry and provide a representation of the level of skill in the field: 4,200,904 by Doan, entitled "Solar powered street lighting system";
4,281,369 by Bane, entitled "Method and apparatus for solar power lighting";
4,319,310 by Kingsley, entitled "Solar signs"; 5,149,188 by Robbins, entitled "Solar powered exterior lighting system"; 5,155,668 by Tanner et al, entitled "Solar powered lamp utilizing cold cathode fluorescent illumination and method of facilitating same"; 7,976, 180 by Haun et al, entitled "Solar powered rechargeable street light with tamper resistant networkable system"; 7,980,725 by Yu et al, entitled "Solar energy street lamp structure with air passageway"; 7,988,320 by Brumels, entitled "Lighting device having adjustable solar panel bracket";
7,997,754 by Zhang et al, entitled "Solar component and devices containing the same"; 8,007,124 by Kim, entitled "Self-generating streetlight"; 8,097,980 by Cyrus et al, entitled "Distributed solar power plant and a method of its connection to the existing power grid"; 8,106,593 by Nevins, entitled "Hybrid lighting device"; 8,215,807 by Brunesti, entitled "Illuminating flagpole assembly";
8,246,207 by Chen et al, entitled "LED solar traffic marking panel fitted with integrated dimming controller"; 8,267,541 by Watanabe et al, entitled "Outdoor illuminating device and illuminating method"; 8,313,210 by Zheng, entitled "Solar-powered LED
indicator lamp";
8,342,706 by Zheng, entitled "LED lamp"; 2008/0137327 by Hodulik, entitled "Grid-tied solar streetlighting"; 2013/0118555 by Samuels, entitled "Solar energy collectors and methods for capturing solar energy"; and 2013/0234605 by Burrows, entitled "Hybrid outdoor streetlamp assembly".
In addition to the foregoing patents, Webster's New Universal Unabridged Dictionary, Second Edition copyright 1983, define various words and terms used herein.
Disclosure of Invention In a first manifestation, the invention is an electrical transmission system having plural electrical supply sources distributed along one or more load circuits carried by one or more transmission lines. A utility pole suspends transmission lines. At least one solar electric generation station supplies electrical energy and has at least three separate and distinct solar collector surfaces, defined by at least one generally East facing panel, at least one generally South

3 facing panel, and at least one generally West facing panel. A plurality of spacer members support the at least three separate and distinct solar collector surfaces in a fixed position relative to the utility pole and have a plurality of clamp passages. A plurality of clamps are adapted to operatively pass through the plurality of clamp passages which are adapted to operatively guide and retain the plurality of clamps. A power coupling conducts electricity generated by the at least one solar electric generation station into the transmission lines.
In a second manifestation, the invention is an electrical transmission system having plural electrical supply sources distributed along one or more load circuits carried by one or more transmission lines. A utility pole suspends transmission lines. At least one solar electric generation station supplies electrical energy and has at least three separate and distinct solar collector surfaces, defined by at least one generally East facing panel, at least one generally South facing panel, and at least one generally West facing panel. A plurality of spacer members support the at least three separate and distinct solar collector surfaces in a fixed position relative to the utility pole. A plurality of adjustable brackets are adapted to operatively affix with the plurality of spacer members adjacent a first end and to the utility pole adjacent a second end distal to the first end. A power coupling conducts electricity generated by the at least one solar electric generation station into the transmission lines.
In a third manifestation, the invention is an electrical transmission system having plural electrical supply sources distributed along one or more load circuits carried by one or more transmission lines. A utility pole suspends transmission lines. At least one solar electric generation station supplying electrical energy has at least one frame member supporting a plurality of individual solar panels on the utility pole. A pivot couples an upper portion of a one of the individual solar panels to the at least one frame member. A slide frame that is adjustable in length is adjacent to a first end affixed to the frame member and adjacent to a second end distal to the first end to one of the individual panels. A change of length of the slide frame causes one of the individual panels to rotate about the pivot and thereby adjusts an angle of orientation of the one of the individual panels relative to the frame member. A power coupling conducts electricity generated by the at least one solar electric generation station into the transmission lines.
Brief Description of the Drawings

4 The foregoing and other objects, advantages, and novel features of the present invention can be understood and appreciated by reference to the following detailed description of the invention, taken in conjunction with the accompanying drawings, in which:
FIG. 1 illustrates a preferred embodiment electrical transmission system designed in accord with the teachings of the present invention from a front elevational view.
FIG. 2 illustrates a preferred embodiment solar electric generation station used in the preferred embodiment electrical transmission system of Figure 1, the present view of Figure 2 taken along section line 2' of Figure 1 to reveal a top plan view of an installed preferred embodiment solar electric generation station.
FIG. 3 illustrates a rear elevational view of the preferred embodiment solar electric generation station of Figure 2, but removed from the utility pole and with the screw-based clamps removed therefrom.
FIG. 4 illustrates a first alternative embodiment solar electric generation station used in the preferred embodiment electrical transmission system of Figure 1, the present view of Figure 4 taken along section line 2' to reveal a top plan view of an installed first alternative embodiment solar electric generation station.
FIG. 5 illustrates a rear elevational view of the first alternative embodiment solar electric generation station of Figure 4, but removed from the utility pole.
FIG. 6 illustrates a second alternative embodiment electrical transmission system incorporating a second alternative embodiment solar electric generation station from a front projected view.
FIG. 7 illustrates the second alternative embodiment electrical transmission system of Figure 6 from a rear projected view.
FIG. 8 illustrates the second alternative embodiment electrical transmission system of Figure 6 from an enlarged front projected view.
FIG. 9 illustrates the second alternative embodiment electrical transmission system of Figure 7 from an enlarged rear projected view.
FIG. 10 illustrates the second alternative embodiment electrical transmission system of Figure 6 from an enlarged front projected view, but with the solar photovoltaic panels removed therefrom.
FIGs. 11-13 illustrate a preferred set of spacer members used in the second alternative

5 embodiment electrical transmission system of Figure 6 from front projected, side, and rear projected views, respectively.
FIGs. 14-16 illustrate a preferred set of solar photovoltaic panels used in the second alternative embodiment electrical transmission system of Figure 6 from top, front, and side views, respectively.
FIG. 17 illustrates a third alternative embodiment electrical transmission system incorporating a third alternative embodiment solar electric generation station from a front projected view.
FIG. 18 illustrates the third alternative embodiment electrical transmission system of Figure 17 from a rear projected view.
FIG. 19 illustrates the third alternative embodiment electrical transmission system of Figure 17 from an enlarged front projected view.
FIG. 20 illustrates the third alternative embodiment electrical transmission system of Figure 18 from an enlarged rear projected view.
FIG. 21 illustrates the third alternative embodiment electrical transmission system of Figure 17 from an enlarged front projected view, but with the solar photovoltaic panels removed therefrom.
FIG. 22 illustrates the third alternative embodiment electrical transmission system of Figure 17 from an enlarged front projected view, but with a second set of solar photovoltaic panels incorporated therein.
FIG. 23 illustrates the third alternative embodiment electrical transmission system of Figure 17 from a schematic view, illustrating the electrical wiring and mechanical coupling to a pole.
Best Mode for Carrying Out the Invention Manifested in the preferred embodiment illustrated in Figure 1, the present invention provides an electrical transmission system 100 having plural electrical supply sources distributed along one or more load circuits such as carried by transmission lines 114, 116. A typical prior art utility pole 110 may, for exemplary purposes only and not solely limiting thereto be provided with a support arm 112 which suspends transmission lines 114, 116 from utility pole 110 and may provide electrical isolation.

6 The electrical supply sources are most preferably one or more solar electric generation stations 120. Each solar electric generation station 120 will preferably be provided with a Direct Current (DC) to Alternating Current (AC) inverter 122, which will preferably include various functions, such as the ability to synchronize with the power grid and the ability to disconnect therefrom in the event of a power failure such as a downed transmission line or other electrical transmission system 100 failure. These inverters are well known in the field of solar electric generation and widely commercially available.
While a DC to AC inverter 122 is preferred, it will be understood that any suitable method of coupling electricity generated by solar electric generation station 120 into inverter output lines 124, 126 and from there to transmission lines 114, 116 will be understood to be incorporated herein. Consequently, inverter 122 might not perform any conversion from DC to AC, and may instead be a simple switch that allows solar electric generation station 120 to be disconnected from transmission lines 114, 116 in the event a repair is required within electrical transmission system 100, to protect the safety of a technician.
Preferred embodiment solar electric generation station 120 has three separate and distinct solar collector surfaces, defined by East facing panel 132, South facing panel 134, and West facing panel 136. These panels 132, 134, 136 may be curved, such as illustrated in Figure 2, in which case they will either have photovoltaic cells deposited or otherwise formed thereon, or will have flexible photovoltaic panels affixed thereto. Alternatively, panels 132, 134, 136 may each be planar, and angularly offset from each other to face approximately East, South, and West, respectively. While three panels are illustrated for exemplary purposes, it will be understood that more or fewer panels may be used, though three are illustrated.
By providing these three panels 132, 134, 136, solar electric generation station 120 does not require a tracking mount, and is still capable of producing electricity throughout the daylight hours. Several manufacturers are able to produce solar cells that are of sufficiently low cost that the benefit from a tracking mount in increased power output throughout a daily cycle is not sufficient to justify the added expense and maintenance of the tracking components. Solar electric generation station 120 additionally is defined by a bottom 131, a top 133, an exterior face 135, and an interior face 137. As may be appreciated, exterior face 135 will preferably have one or more solar cells either formed in place or mounted thereon. For exemplary purposes only, and

7 =
not solely limiting the invention thereto, exterior face 135 may have a Copper Indium Gallium Selenide (CIGS) thin film material, which is easily deposited onto flexible substrates, wrapped or glued to the exterior face or may in another extreme have many small fixed flat glass panels or panes containing mono-crystalline photovoltaic cells angularly stepped about utility pole 110.
Preferred embodiment solar electric generation station 120 is illustrated in greater detail in Figures 2 and 3. Supporting the three panels 132, 134, 136 in a fixed position relative to utility pole 110 are a plurality of spacer members, such as spacer members 142, 144, 146, 148. The number and location of these spacer members 142, 144, 146, 148 is not critical to the present invention, and will be determined when a number of design factors are taken into consideration.
For exemplary and non-limiting purposes, factors such as wind, ice and snow loading may be used to determine a maximum load that might be placed upon preferred embodiment solar electric generation station 120. Once the maximum load is determined, then the type of material, the thickness and geometry, and other such design computations may be made.
Preferably, a plurality of screw-based clamp passages 152, 154, 156 are also provided which serve to guide and retain a plurality of screw-based clamps 170 that may for exemplary purposes include a perforated strap 172, fixed screw mount 174, and worm-drive screw 176. This type of screw-based clamp 170 is commercially referred to as metal banding with worm gear type adjustment screws, and is commonly sold as hose and pipe clamp and for other purposes by such vendors as Vertex Distribution ofAttleboro, Massachusetts, Signs Direct of Bloomington, Illinois, and MOWCO Industry Limited of Shenzen, China. While other types of clamps may be provided in association with preferred embodiment solar electric generation station 120, including but not limited to other types of strap, band, and even webbing, screw-based clamp 170 provides very rapid, secure, intuitive, familiar, and low-cost coupling to utility pole 110, which is preferred to decrease the cost of installation and maintenance.
For many installations, the clamping force generated by screw-based clamp 170 will be sufficient to adequately support solar electric generation station 120.
However, and particularly for coupling with wooden utility poles, one or more gripping teeth 162, 164, 166, 168 may be provided that protrude from spacer members 142, 144, 146, 148. The specific geometry of these gripping teeth 162, 164, 166, 168 may be altered to suit the characteristics most desired by a designer, such as penetration depth, inter-tooth spacing, and so forth.
Alternatively, gripping teeth 162, 164, 166, 168 may be an alternative material that provides increased adhesion to a

8 particular surface, such as a rubber or similar elastomeric material having a relatively high co-efficient of friction. Such materials may be useful for coupling with a steel utility pole.
As may be appreciated, preferred embodiment solar electric generation station 120 will be designed to directly attach to most existing utility poles, thereby using the existing utility pole 110 as the main support and as immediate access to the electric power grid.
This in turn means that there is minimal mounting hardware required, no special anchoring into the earth, and no special permitting required, since the present electrical transmission system 100 uses existing infrastructure. This in turn means that preferred embodiment electrical transmission system 100 may be produced, installed, and maintained for substantially less capital than required for prior art systems.
The materials used to fabricate preferred embodiment solar electric generation station 120 are not critical to the present invention. For exemplary purposes, a base material used to fabricate panels 132, 134, 136 may be galvanized steel. In such case, the steel may be stamped or otherwise formed to shape, though again the particular method of deriving the shape is not critical to the present invention. As already discussed herein above, photovoltaic cells may be formed upon or affixed to the exterior face 135.
Alternative embodiments of apparatus designed in accord with the present invention have been illustrated in Figures 4 - 23. The embodiments are distinguished by the hundreds digit, and various components within each embodiment designated by the ones and tens digits. However, many of the components are alike or similar between embodiments, so numbering of the ones and tens digits have been maintained wherever possible, such that identical, like or similar functions may more readily be identified between the embodiments. If not otherwise expressed, those skilled in the art will readily recognize the similarities and understand that in many cases like numbered ones and tens digit components may be substituted from one embodiment to another in accord with the present teachings, except where such substitution would otherwise destroy operation of the embodiment. Consequently, those skilled in the art will readily determine the function and operation of many of the components illustrated herein without unnecessary additional description.
Figures 4 and 5 illustrate a first alternative embodiment solar electric generation station 220. In this embodiment, rather than using screw-based clamps, a set of adjustable mounting brackets 252, 254, 256, 258 are used to terminate spacer members 242, 244, 246, 248. The

9 adjustable mounting brackets 252, 254, 256, 258 may, for exemplary purposes only and not solely limiting thereto, comprise L-shaped brackets that bolt, screw or otherwise affix to spacer members 242, 244, 246, 248, and also bolt, screw or otherwise affix at a distal end to utility pole 110. This method of attachment is limited, since adjustable mounting brackets 252, 254, 256, 258 are adjacent to interior face 237 and therefore hard to access.
Nevertheless, adjustable mounting brackets 252, 254, 256, 258 may be provided near to the top and bottom of solar electric generation station 220, and in such case sufficient access clearance will exist.
While the embodiments of Figures 2 and 4 each illustrate the spacing between utility pole 110 and exterior face 135, 235 as being equidistant at both bottom 131, 231 and top 133, 233, the present invention also contemplates changing the spacing to suit a particular application. The present invention may be readily modified to optimize solar incidence upon the solar electric generation station at various latitudes and for various times of day.
At sunrise and sunset, the solar rays are arriving in a pearly horizontal plane. In this case, the spacing between utility pole 110 and the exterior face 135 adjacent to top 133 and East facing panel 132 may be approximately equal to the spacing between utility pole 110 and the exterior face 135 adjacent to bottom 131 and East facing panel 132. This means that East facing panel 132 is oriented in an approximately vertical plane, which may be appropriate for morning and evening solar exposure. Consequently, West facing panel 136 may also be oriented in an approximately vertical plane. However, except at the most northern latitudes, at midday the solar rays will be traveling at some angle generally between horizontal and vertical, such as at between 33 and 66 degrees from horizontal. To better align South facing panel 134 with the approximately midday sun, and thereby improve the collection of midday solar radiation and solar electric generation, South facing panel 134 may also be tilted from vertical. While not illustrated, it will be apparent that the spacing between utility pole 110 and the exterior face 135 adjacent to top 133 and South facing panel 134 may be very different from the spacing between utility pole 110 and the exterior face 135 adjacent to bottom 131 and South facing panel 134.
Similarly, if more than three panels are used to defme solar electric generation station 120, the panels that are more south facing may also tilt more out of the vertical plane towards the horizontal plane than less south facing panels.
Figures 6 - 16 illustrate a second alternative embodiment electrical transmission system 300 having plural electrical supply sources distributed along one or more load circuits such as carried by transmission lines 314, 316. A typical prior art utility pole 310 may, for exemplary purposes only and not solely limiting thereto be provided with a support arm 312 which suspends transmission lines 314, 316 from utility pole 310 and may provide electrical isolation.
The electrical supply sources are most preferably one or more solar electric generation stations 320. Each solar electric generation station 320 will preferably be provided with a Direct Current (DC) to Alternating Current (AC) inverter 322, which will preferably include various functions, such as the ability to synchronize with the power grid and the ability to disconnect therefrom in the event of a power failure such as a downed transmission line or other electrical transmission system 300 failure. These inverters are well known in the field of solar electric .. generation and widely commercially available.
While a DC to AC inverter 322 is preferred, it will be understood that any suitable method of coupling electricity generated by solar electric generation station 320 into inverter output lines 324, 326 and from there to transmission lines 314, 316 will be understood to be incorporated herein. Consequently, inverter 322 might not perform any conversion from DC to AC, and may instead be a simple switch that allows solar electric generation station 320 to be disconnected from transmission lines 314, 316 in the event a repair is required within electrical transmission system 300, to protect the safety of a technician.
Preferred embodiment solar electric generation station 320 has a plurality of separate and distinct solar collector surfaces 336. These panels 336 may be curved, in which case they will either have photovoltaic cells deposited or otherwise formed thereon, may have flexible photovoltaic panels affixed thereto, or may be fabricated in smaller flat support segments 345 such as illustrated in Figures 14 - 16. In the embodiment as illustrated, panels 336 may each be planar, and angularly offset from each other to face approximately East, South and West, respectively. While three panels are illustrated for exemplary purposes, it will be understood that more or fewer panels may be used, though three are illustrated.
By providing these three panels 336, solar electric generation station 320 does not require a tracking mount, and is still capable of producing electricity throughout the daylight hours. Several manufacturers are able to produce solar cells that are of sufficiently low cost that the benefit from a tracking mount in increased power output throughout a daily cycle is not sufficient to justify the added expense and maintenance of the tracking components.

Preferred embodiment solar electric generation station 320 is illustrated in greater detail in Figures 7 - 9. Supporting the panels 336 in a fixed position relative to utility pole 310 are a plurality of spacer members 342. The number and location of these spacer members 342 is not critical to the present invention, and will be determined when a number of design factors are taken into consideration. For exemplary and non-limiting purposes, factors such as wind, ice and snow loading may be used to determine a maximum load that might be placed upon preferred embodiment solar electric generation station 320. Once the maximum load is determined, then the type of material, the thickness and geometry, and other such design computations may be made. Preferably, a plurality of screw-based clamp passages 352, 354, 356 are also provided which serve to guide and retain a plurality of screw-based clamps 370 that may for exemplary purposes include a perforated strap 372, fixed screw mount 374, and worm-drive screw. While other types of clamps may be provided in association with preferred embodiment solar electric generation station 320, including but not limited to other types of strap, band, and even webbing, screw-based clamp 370 provides very rapid, secure, intuitive, familiar, and low-cost coupling to utility pole 310, which is preferred to decrease the cost of installation and maintenance.
As may be appreciated, preferred embodiment solar electric generation station 320 will be designed to directly attached to most existing utility poles, thereby using the existing utility pole 310 as the main support and as immediate access to the electric power grid. This in turn means that there is minimal mounting hardware required, no special anchoring into the earth, and no special permitting required, since the present electrical transmission system 300 uses existing infrastructure. This in turn means that preferred embodiment electrical transmission system 300 may be produced, installed, and maintained for substantially less capital than required for prior art systems.
Figures 17 - 23 illustrate a third alternative embodiment electrical transmission system 400 having plural electrical supply sources distributed along one or more load circuits such as carried by transmission lines 414, 416. A typical prior art utility pole 410 may, for exemplary purposes only and not solely limiting thereto be provided with a support arm 412 which suspends transmission lines 414,416 from utility pole 410 and may provide electrical isolation.
The electrical supply sources are most preferably one or more solar electric generation stations 420. Each solar electric generation station 420 will preferably be provided with a Direct Current (DC) to Alternating Current (AC) inverter 422, which will preferably include various functions, such as the ability to synchronize with the power grid and the ability to disconnect therefrom in the event of a power failure such as a downed transmission line or other electrical transmission system 400 failure. These inverters are well known in the field of solar electric generation and widely commercially available.
While a DC to AC inverter 422 is preferred, it will be understood that any suitable method of coupling electricity generated by solar electric generation station 420 into inverter output lines 424, 426 and from there to transmission lines 414, 416 will be understood to be incorporated herein. Consequently, inverter 422 might not perform any conversion from DC to AC, and may instead be a simple switch that allows solar electric generation station 420 to be disconnected from transmission lines 414, 416 in the event a repair is required within electrical transmission system 400, to protect the safety of a technician.
Preferred embodiment solar electric generation station 420 has a plurality of separate and distinct solar collector panels 436. These panels 436 are preferably fabricated to support a plurality of smaller hexagonal Concentrated Photo Voltaic (CPV) modules 445, such as are available for exemplary purpose from Morgan Solar of Toronto, Canada, though other geometries and types of photovoltaic cells may be used. In the embodiment as illustrated, panels 436 may each be planar, are illustrated as having a geometry supporting three CPV modules 445 on each panel 436, and are angularly repeating about pole 410 to face approximately East, South and West, respectively. While three panel directions are illustrated for exemplary purposes, it will be understood that more or fewer panels 436 maybe used, though three are illustrated.
Likewise, more or fewer than three CPV modules 445 may be supported on each panel 436.
By providing these panels 436, solar electric generation station 420 does not require a tracking mount, and is still capable of producing electricity throughout the daylight hours.
Several manufacturers are able to produce solar cells that are of sufficiently low cost that the benefit from a tracking mount in increased power output throughout a daily cycle is not sufficient to justify the added expense and maintenance of the tracking components.
Preferred embodiment solar electric generation station 420 is illustrated in further detail in Figures 18 - 23. Supporting panels 436 in a fixed position relative to utility pole 410 are a plurality of frame members 442 visible in Figure 23. Frame members 442 preferably comprise hollow members, such as four-sided tubes of metal or the like. The size, wall thickness, number, and location of these frame members 442 is not critical to the present invention, and will be determined when a number of design factors are taken into consideration. For exemplary and non-limiting purposes, factors such as wind, ice and snow loading may be used to determine a maximum load that might be placed upon preferred embodiment solar electric generation station 420. Once the maximum load is determined, then the type of material, the thickness and geometry, and other such design computations may be made. A plurality of screw-based clamps 470 that may for exemplary purposes include a perforated strap 472, fixed screw mount 474, and worm-drive screw are used to secure frame members 442 to pole 410. While other types of clamps may be provided in association with preferred embodiment solar electric generation station 420, including but not limited to other types of strap, band, and even webbing, screw-based clamp 470 provides very rapid, secure, intuitive, familiar, and low-cost coupling to utility pole 410, which is preferred to decrease the cost of installation and maintenance. Where utility pole 410 is fabricated from wood, a plurality of gripping teeth or spikes 462 may be affixed, for exemplary but non-limiting purpose to frame members 442.
Each frame member 442 may support a number of individual panels 436, such as illustrated in Figure 23. Individual panels 436 may optionally and as illustrated are preferably configured for angular adjustment using a combination of an adjustable slide frame 447 and a pivot 449, also visible in Figure 23. Pivot 449 might, for exemplary and non-limiting purposes, be comprised by a simple hinge. Adjustable slide frame 447 can be any suitable member that permits length adjustment known in the hardware arts. For exemplary purposes only, and not solely limiting the invention thereto, adjustable slide frame 447 may be comprised of two strips of metal, one with a circular hole and the other with a slot, and a small bolt and wing nut used to lock the two strips of metal together. Pivot 449 couples an upper portion of panel 436 to frame 442. Adjustable slide frame 447 is affixed adjacent to one end to frame 442 and adjacent the other end to panel 436. Adjustable slide frame 447 may then be shortened or lengthened, causing panel 436 to rotate about pivot 449, to adjust the angle of orientation of each CPV module 445.
Adjusting the length of adjustable slide frame 447 can be used to adjust for seasonal variances, but would most commonly be only adjusted once, at the time of installation, to compensate for latitudinal variances between different installation sites.
Furthermore, preferred angular orientation will vary around pole 410. For exemplary purposes, panels 436 facing directly east and west will be more nearly vertical than those facing south, corresponding to the angle of incidence of the sunlight for the compass orientation of the individual panel. This adjustable length is also beneficial for shipping prior to installation, since individual panels 436 may be laid flat against the supporting frame member 442.
Figure 21 illustrates solar collector panels 436 without or prior to installation of CPV
modules 445. Each panel 436 in the preferred embodiment is provided with three support surface regions 482, 484, 486, each of the support surface regions which are adapted to receive a CPV
module 445. Extending from the center support surface region 484 is a tab 488 containing a wire raceway 443 which provides electrical connection to each one of the CPV
modules 445 mounted upon panel 436.
Figure 22, which is very similar to Figure 17, illustrates the addition of a second solar electric generation station 420', simply by mounting solar electric generation station 420' on utility pole 410 just below solar electric generation station 420. The output from solar electric generation station 420' may be joined with the output from solar electric generation station 420 simply by coupling the wires therewith, or, if so desired, by coupling directly into inverter 422.
As may be appreciated, preferred embodiment solar electric generation station 420 will be designed to directly attached to most existing utility poles, thereby using the existing utility pole 410 as the main support and as immediate access to the electric power grid. This in turn means that there is minimal mounting hardware required, no special anchoring into the earth, and no special permitting required, since the present electrical transmission system 400 uses existing infrastructure. This in turn means that preferred embodiment electrical transmission system 400 may be produced, installed, and maintained for substantially less capital than required for prior art systems.
Industrial Applicability Exemplary embodiments of the present invention solve inadequacies of the prior art by providing solar panels and securing brackets that defme solar electric generation stations. These solar electric generation stations mount to existing utility poles to define an electrical transmission system.
The present invention and the preferred and alternative embodiments have been developed with a number of objectives in mind. While not all of these objectives are found in every embodiment, these objectives nevertheless provide a sense of the general intent and the many possible benefits that are available from embodiments of the present invention.
A first object of the invention is to provide a solar electric generation station that may be directly attached to most existing utility poles, thereby using the existing utility pole as the main support and as immediate access to the electric power grid. A second object of the invention is to provide a solar electric generation station that is easily installed upon the utility pole. Another object of the present invention is to provide a solar electric generation station that does not require a tracking mount, and yet which is capable of producing electricity throughout the daylight hours. A further object of the invention is to reduce the capital outlay required for a solar electric generation station and avoid the need for special permitting by using existing utility poles as the main support. Yet another object of the present invention is to readily enable design variations to optimize solar incidence upon the solar electric generation station at various latitudes.
While the foregoing details what is felt to be the preferred embodiment of the invention, no material limitations to the scope of the claimed invention are intended.
Further, features and design alternatives that would be obvious to one of ordinary skill in the art are considered to be incorporated herein. The scope of the invention is set forth and particularly described in the claims herein below.

Claims

. .
We Claim:

1. An electrical transmission system having plural electrical supply sources distributed along one or more load circuits carried by one or more transmission lines, comprising:
a utility pole suspending transmission lines; and at least one solar electric generation station supplying electrical energy having at least one frame member supporting a plurality of individual solar panels on said utility pole;
wherein the improvement comprises:
a pivot coupling an upper portion of a one of said individual solar panels to said at least one frame member;
a slide frame adjustable in length and adjacent to a first end affixed to said frame member and adjacent to a second end distal to said first end to said one of said individual panels, wherein a change of length of said slide frame causes said one of said individual solar panels to rotate about said pivot and thereby adjusts an angle of orientation of said one of said individual solar panels relative to said frame member;
and a power coupling that conducts electricity generated by said at least one solar electric generation station into said transmission lines.

2. The electrical transmission system of claim 1, wherein said at least one frame member further comprises three separate and distinct frame members having a plurality of solar collector surfaces affixed thereto, defined by at least one generally East facing frame member, at least one generally South facing frame member, and at least one generally West facing frame member.

3. The electrical transmission system of claim 1, wherein said at least three separate and distinct frame members each further comprise more than three solar collector surfaces used to define solar electric generation station, said panels that are more south facing also tilting more out of the vertical plane towards a horizontal plane than less south facing panels.