Applicationes Actuales et Tenditiae Futurae Unitatum Principalium Anularium (RMUs) Solido-Insulatarum

1.Status Applicativus Currentis Unitatum Anularium Isolatorum Solidorum in Reticulis Distributionis Medii Voltae

1.1 Amplissima Applicatio in Regionibus Urbicis Habitabilibus

Componentes principales unitatum anularium medii voltae (RMUs) praeponderanter constare commutationes oneris et fusibilia. Hae unitates plures adiuvantia praebent, inter quae structura simpliciter, magnitudo compacta, et pretium relativum parvum. Praeterea, efficaciter meliorant qualitatem electricitatis et augent fiduciam et securitatem distributionis. Observatur, ut maximus amperage praescriptus RMUs medii voltae sit 1250A, cum valor typicalis sit 630A. Secundum media insulatoria, RMUs generaliter dividi possunt in duas species: aer-insulati et SF₆ gas-insulati. Haec principaliter adhibentur ad commutandum currentes oneris et interrumpendum currentes circuiti brevis, simulque certas functiones controlis et protectionis praebentes.

1.2 RMUs Cum Commutationibus Vacui Praebent Fiduciam Isolationis

Commutationes oneris in RMUs aer-insulatis includunt quattuor species: gas-generantes, aer-compressus, vacui, et SF₆. Inter haec, commutationes oneris SF₆ servire principali commutationi in RMUs aer-insulatis. Commutationes in clausis capsulis generaliter habere tres positiones operationales: interruptionem oneris, terram fiducialem, et isolationem circuiti.

1.3 Augmentata Nivellus Applicativus Practicus

Generaliter, RMUs designari compacte. Propter hanc characteristicam, plures commutationes oneris (typice commutationes altae voltaginis) habere structuram simpliciter et equipari fusibilia altae voltaginis. Operatio normalis RMUs principaliter dependere commutationes oneris, dum currentes circuiti brevis efficaciter interrumpi per fusibilia. Combinatio effectiva harum duarum componentum maxime substituit interruptores circuiti, licet talis substitutio limitetur ad certos rangos capacitatis.

2.Tenditiae Developmentalis et Characteristicae Technicales Unitatum Anularium Isolatorum Solidorum

2.1 Effectiva Applicatio Technologiae Pili Inclusi

Resina epoxy communiter adhibetur ut materia insulatoria principalis in insulatione solida, cum vacuum serviat ut medium extinguendi arcus. Ut efficaciter adsequi functiones sicut oneri et currentis isolationis, mechanismus operativus debet recte actuatori ut potestas systematis distributionis efficaciter controllari, ulterius protegendo apparatus et personale. Insulatio solida significanter minuit spatium insulatorium phase-to-terra intra switchgear, abbrevians intervallum aerationis a 125mm ad paucas millimetros. Sine gas SF₆, volumen totale comparatur ad C-GIS traditionalem. Praeterea, usus mechanismi operativi simpliciter reducit numerum componentium, augmentando fiduciam apparati.

2.2 Characteristicae Technicales RMUs Insulatorum Solidorum

Comparatis RMUs aer-insulatis cum commutationibus SF₆ et RMUs gas-insulatis SF₆, RMUs insulatorum solidorum praebent plures adiuvantia: Primo, structura capsulis est simpliciter. Per eliminandum vascula pressionis, manometros, valvas repletionis, et alia componentia gas-relativa, fiducia RMUs multum augitur, costes maintenance diminuuntur, et condicio operativa commutationis efficaciter melioratur. Secundo, commutatio principalis equipatur cum componentia isolationis, praebens fracturam visibile clariter. Insulatio solida principaliter adhibet tubulos et tubos insulatorios resinae epoxy. Haec materiae efficaciter mitigant liquefactionem SF₆ in regionibus frigidis et reducunt effectus adversos ex expansione thermica in regionibus calidis, demonstrantes applicabilitatem latam in ambientibus extremis.

3.Quaestiones Requirentes Attentionem in Unitatibus Anularibus Isolatorum Solidorum

3.1 Technologia Insulationis et Coatingis Superficialis

Secundum mechanisma formationis partialis discharge, discharges internae in insulatione solida principaliter causantur praesentia cavitarum. Technicae sealing hodiernae generaliter involvere preheating formae metallica, ponendo componentes preheated in formam, lentamente injecto sub vacuum, et curing. Hoc processus non solum inefficiens sed etiam costosus. Remotio incompleta bubulae potest ducere ad numerosas cavitas in insulatione solida, potentialiter causantes partialis discharge durante operatione, ducendo ad longa tempora cracking componentium insulationis et affectando securem et fidelis operationem apparatorum.

Proinde, introducenda sunt technicae encapsulationis resinae epoxy superioris, altae qualitatis, et efficientis. Praeterea, quia shielding superficiale directe afficit performance apparatorum, quaestio shielding superficialis, id est, technologia shielding superficialis, debet adhiberi in designo et productione. Intentio metallizationis superficiei materialium insulatoriorum est praebere grounding fidelem pro componentibus insulationis solidorum, minimizare impactum factorum ambientalium, et augmentare performance producti. Presentiter, pars significativa RMUs insulatorum solidorum in mercato caret tractamento superficiale proprie, resultans in altis nivellis partialis discharge in productis suppeditatis.

3.2 Defectus Experienciae Operationis et Maintenance

RMUs insulatorum solidorum sunt technologia nova. Propter defectum dispositionum scientiarum et rationabilium operationis probationis per reticula electrica, volumen operationis totale est parvum, tempus operationis breve, et connectiones reticularum provincialium incompletae. Exempli gratia, in regionibus altae temperature, altae humidorum, litoralibus, altae pluviarum, et magna variatione diurna, quaestiones practicae requirunt solutiones. Experientia operativa comprehensiva debet colligi per nationem ad faciendas improvementes targetas et prospectivas ad RMUs insulatorum solidorum, continuando augmentando security et stabilitatem producti.

3.3 Development of Solid-Insulated RMU Equipment

In recentibus annis, cum celeri developmente rete distributionis Sinensis, nivellus technicus systematis distributionis significanter augmentavit. Gas SF₆ fuit amplissime adhibitus in RMUs medii voltae. Ex statu developmentis hodierno Sinensis, gas SF₆ praebet optimam performance totalem. Tamen, cum crescente conscientia de conservatione naturae et importantia environmentali, ampla adhibitio gas SF₆ in RMUs praebet quaedam pericula environmentalia et potentialia pericula saluti humani. Proinde, reductio adhibitionis RMUs gas SF₆ et promotion solid-insulated RMUs erit primarius finis pro developmente apparatorum commutationis altae voltaginis. Fabricantes domestici praevidebant hanc tendentiam et paulatim coeperunt development et productionem productorum RMU insulatorum solidorum.

3.4 Optimizatio Structurae Design Module Insulationis

Design structurae moduli insulationis debet, dum satisfacit requisitis functionalibus, inspectionis, et installationis, conari ad reductionem consumtionis materialis et preventionem stress residuae. Praesentia stress residuae potest causare rupuras internas et externas in componentibus insulationis solidorum, ducendo ad partialis discharge durante operatione et potentiali breakdown insulationis. Proinde, investigatio profunda de structura totale, crassitudine, et transitionibus modulorum insulationis necessaria est, cum consideratio data conceptibus dissipationis caloris.

3.5 Investigatio et Design Stratorum Shielding

Principale intentio design externi est planificare shielding metallicum grounding: primo, in casu failure insulationis, confinare fault short-circuit ad phase-to-terra tantum, reducendo energiam arcus et riskum fault; secundo, maintinere performance insulationis in omni ambiente sine requiremento cleaning superficiei externae moduli, asserendo distributionem electric field immutabiletiam etiam cum objectis metallicis alienis intus cabinetum.

4.Directiones Developmentalis pro Technologia Unitatum Anularium Isolatorum Solidorum

4.1 Development Novarum Materialium Insulatoriarum Altae Performance

Quamquam resina epoxy bene perficitur ut materia insulationis solidi, processus casting in vacuum ceramic arc-quenching chambers potest laedere raw materials. Proinde, essentialis est developping advanced epoxy resins that surpass current material characteristics. In 2014, journal Science published an article on the discovery of a new recyclable thermosetting polymer, marking a significant advancement in the recycling of "polysalicylate" thermosetting plastics. This polymer exhibits high recyclability, addressing the issue that thermosetting plastics were previously non-recyclable. In the next decade, new products will increasingly utilize recyclable thermosetting materials.

4.2 Investigatio Methodorum Connectionis Interface Internarum Componentium

Cum RMUs insulatorum solidorum fabricentur per encapsulandum conductores circuiti principales et partibus montandis intra insulationem solidam, inflexibilitas componentium imbedded requirit connectiones standardizatas inter different cast elements. Configuratio totalis RMU est linear, et connecting conductors must be cast with epoxy resin, requiring a certain degree of freedom during product rationalization. To address this, an interface technology using silicone rubber material for gate-to-conductor connections is proposed. This method enables standardization, allowing components to be interconnected and reasonably configured, reducing the design complexity of the overall insulated enclosure.

4.3 Prospectus Promotionis Mercatoriae pro RMUs Insulatorum Solidorum

RMUs insulatorum solidorum characterizantur structura simpliciter, magnitudine compacta, non-toxicitate, operatione sine pollutione, et environmental friendliness, aligning with the global green development concept. However, for a product to be successful, manufacturers must profit from sales, making market application a key focus. Understanding and meeting user needs is critical to the successful introduction of new products. The application prospects of solid-insulated products are analyzed based on user requirements.

4.3.1 Producta Conformantia Necessitatibus Consumtorum

Durante usu, users first require that product technical parameters comply with relevant standards (technical specifications, national and industry standards, etc.) and obtain certification from the national power industry. As no specific standards currently exist for solid-insulated products, manufacturers must assist in establishing national or industry standards. It is reported that by December 31, 2002, claims for approximately 15 million tons of solid-insulated products had been filed.

4.3.2 Altae Necessitates Usuarum pro Productis Reticuli Distributionis

Medium-voltage distribution equipment is a fundamental component widely used in power grids. With the continuous expansion of grid infrastructure, demand for medium-voltage equipment as a bridge between main networks and end-users is growing. Users require products with long service life, strong environmental adaptability, compliance with environmental standards, compact size, easy and quick installation, economic convenience, and a reliable operational history.

Solid-insulated RMUs have compact dimensions, with single load switch cabinet units measuring 860mm (depth) × 420mm (width) × 1200mm (height) or 850mm (depth) × 500mm (width) × 1600mm (height). Their size falls between that of air-insulated switchgear. Based on the above technical performance, solid-insulated RMUs provide enhanced personal safety. However, due to their relatively short operational history, only a limited number of units are currently in service across several Chinese factories. Given the limited operational data, it is currently impossible to evaluate the aging of epoxy insulation or determine inspection cycles.

Some domestic equipment manufacturers guarantee a product lifespan of over 20 years through advanced production facilities (workshops, molds, and automated laser welding). This represents a competitive advantage. Economically, current production of solid-insulated enclosures requires significant investment in specialized equipment, molds, and materials, resulting in higher market prices. Additionally, as power systems primarily use equipment bidding with a focus on low prices, SF₆ RMU modules have become increasingly cost-competitive, making it difficult for solid-insulated RMUs to gain market dominance in the short term.

4.3.3 Environmental Requirements for Products

In most regions, users require normal operating environments not exceeding 40°C and not below -10°C. However, the increasing frequency of natural disasters globally has raised user demands. For example, RMUs installed in harsh environments must be fully enclosed and maintenance-free, ensuring complete insulation. Circuit breaker equipment must exhibit strong environmental adaptability, dust and moisture resistance, short-term immersion protection, and enhanced vibration resistance.

Casting internal components of circuit breakers with epoxy resin significantly increases the dielectric strength of insulating materials, preventing degradation due to vibration during transportation and use. Compared to gas-insulated RMU products, some manufacturers have conducted tests in Qinghai and coastal humid regions, as well as at altitudes around 4000m, achieving IP68 protection ratings. Therefore, solid-insulated RMU products better meet environmental requirements.

5.Conclusion

Based on the current development status of solid-insulated RMUs in China, the insulation technology is relatively mature, effectively addressing the shortcomings of air-insulated and gas-insulated RMUs, and suitable for special environments such as high-altitude regions. The adoption of solid-insulated RMUs can effectively promote the development of China's power grid and contribute to sustainable socioeconomic development. With growing attention to environmental protection, it can be confidently stated that solid-insulated RMUs have broad application prospects.