What is the safest temperature measurement method for dry-type transformer windings-INNO

Overview of solutions for fluorescent fiber optic temperature controllers for dry-type transformers
The measurement range specified in the “Electronic Temperature Controller for Transformers” (JB/T7631-2016), which uses Pt100 as the traditional temperature sensor, can only be limited to below 1000V, and this sensor is made of metal material, which poses a safety hazard. したがって, temperature sensor probes and leads for measuring transformer winding temperature have higher requirements.

The fiber optic temperature controller uses our company’s independently developed 蛍光光ファイバー温度センサー温度感知素子として. This temperature sensing element is immune to electromagnetic interference and resistant to high voltage (100KV/fiber to ground lead distance of 0.4m). Fluorescent fiber optic temperature measurement completely solves potential safety hazards from the source of temperature measurement and improves the safety level of transformers.

Target of 蛍光光ファイバー温度測定システム乾式変圧器用
For the operating environment of dry-type transformers, isolation and shielding from external electrical interference signals are achieved from the power supply, signal input end, signal output end, and temperature control box shell.
No metallic substances, 本質安全防爆.
In response to vibration, ほこり, 水分, oil and other on-site working environments, multi-layer protective measures are taken to ensure that the fiber optic 温度コントローラー has good electromagnetic compatibility, ensuring stable and reliable operation.
Design principles of fluorescent fiber optic temperature measurement host for dry-type transformers
Principle of practicality
The system construction adheres to the principle of practicality. On the basis of practicality, progressiveness and foresight are considered, and standard, advanced and mature products and development platforms are selected to build a system that is practical and solves practical problems.

Standardization principle
The system software and hardware platforms and application development tools used in application construction should comply with national standards, 情報産業省の基準, 関連する技術仕様と会社の要件.

均一性の原則
情報の一元管理の方針に従う, 全体的な計画, 全体的なデザイン, そして段階的な実装, 実装プロセスには 4 つの統一原則が組み込まれています: 統一されたリーダーシップ, 統一計画, 統一規格, 統合された組織と実装.

信頼性の原則
The software and hardware resources need to ensure the uninterrupted and reliable operation of the 光ファイバー温度測定システムのために 7 × 24 時間. したがって, it is necessary to equip a complete design of reliability measures to ensure the highly reliable operation of the system and fully consider the reliability requirements of key system applications.

信頼できるセキュリティ機構
このシステムは一連の安全な暗号化対策を採用しています, 内蔵の 64 ビット暗号化アルゴリズム. このシステムはより高いセキュリティを備えており、データ漏洩や盗難を効果的に防止できます。, 安全性の確保, 正確さ, システムのデータの整合性, 不正なオペレータの操作と正当なオペレータの違法な操作を防止する.

操作インターフェースはシンプル, フレンドリー, そして非常に知的な
システムは入力データの合法性を自動的にチェックし、オペレーターのエラーに対してわかりやすいプロンプトを表示します。.

Stable operation and reliable data.
プラットフォームの操作は簡単です, マスターしやすい, インストールプロセスは簡単です. 必要に応じてデータをさまざまなレポートに自動生成できます, 経営効率の向上.
Principle of Fluorescent Fiber Optic Temperature Measurement
The fiber optic probe consists of three parts: ST connector, 光ファイバーケーブル, and end temperature sensing end. The ST connector is the connection part with the photoelectric module; Fiber optic cable is the transmission part, with quartz fiber inside. The quartz fiber has a coating and cladding on the outside, and a Teflon protective sleeve on the outermost part; The end temperature sensing end contains temperature sensitive rare earth materials, which excite fluorescence after being irradiated by fixed wavelength light. After the excitation stops, the relationship between the decay time constant of fluorescence afterglow and temperature is a quasi exponential function. The temperature can be obtained by measuring the time constant of afterglow; The optical fiber is resistant to high temperatures of 200 ℃ and has an outer diameter of 3mm. Long term bending radius of 13.2cm. Short term bending radius 4.4cm

The sensor probe material is rare earth fluorescent material, and its biggest advantage compared to other optical fiber temperature measurement principles is that temperature measurement is independent of light intensity. It has strong compatibility with the inconsistency of fluorescence intensity, optical path attenuation, and circuit drift in hardware. したがって, it is not affected by electromagnetic interference and can withstand high voltage, making it very suitable for high voltage, strong magnetic field, flammable and explosive temperature measurement occasions.

Introduction to wiring and installation of fiber optic temperature controllers for dry-type transformers
1.1 Structural framework
システムは 3 つの部分から構成されます: a fluorescent fiber optic temperature controller, 蛍光ファイバー光プローブ, および光ファイバー通信ソフトウェア.

The data transmission between the backend system and the temperature measurement terminal adopts RS485 communication method.

すべてのデータ収集, 管理, and temperature display are completed by communication software, and the system mainly realizes data collection and monitoring of temperature measurement. The fiber optic temperature measurement terminal integrates multi-channel fluorescent optical fibers, providing external RS485 communication, 干渉防止, and corrosion-resistant design.

Application functions of fiber optic temperature controller system for dry-type transformers
1.1 リアルタイム監視
データ収集密度は顧客のニーズに応じて設定可能, システムは設定されたパラメータに基づいて定期的にデータを収集します. それから, 表形式または曲線描画で表示され、リアルタイム監視を実現します。. 設備稼働状況をリアルタイムに監視; Real time monitoring and recording of reactor temperature.

1.2 Basic functions
1) 温度データのクエリ

1. 指定した日付の温度データをクエリできます, ブラウズ, 印刷する, そしてExcelにエクスポートします.

2) 履歴温度データの保存

1. 温度データを永続的に記録する

Introduction to fiber optic temperature controller for dry-type transformers
2.1 Main features
The fiber optic temperature controller is embedded installation. This product has unique technical advantages in temperature measurement in special environments such as high voltage, 強い電磁干渉, 等. The temperature hotspot and measurement signal receiving part of the fluorescent 光ファイバー温度センサー do not use electrical connections, 長期間にわたって高精度かつ安定した動作が可能, 応用範囲が大幅に向上. The fiber optic temperature controller has high accuracy and sensitivity, is resistant to high pressure and can be remotely monitored, has a long lifespan, サイズが小さいです, 機器のメンテナンスが簡単かつ便利になります, 安全な輸送を保証します.

2.2 Main functions
Provide three winding temperature measurement; Automatic/manual start stop cooling fan function; Digital compensation function for display values of each channel
The digital tube displays the temperature of the transformer’s hot spot on a circuit;
ブラックボックス機能を提供する, which can record temperature data and historical maximum temperature before three power outages;
変圧器ドアキャビネットポイント開口アラーム機能を提供します;
Provide functions such as over temperature alarm, fault alarm, 旅行, 等
RS485通信機能を提供, communication with time mark can receive timing or MODBUS-RTU protocol (F関数)
2.3 Additional features
提供する 4 独立した4～20mAアナログ電流出力機能; (E機能)
PTC nonlinear resistance sensing temperature measurement protection function; (C function)
巻線温度上昇率、鉄心温度上昇率の警報機能;
通信プロトコルはProfibusなどの方式を採用可能, IEC60870-5-103, イーサネット通信, 等;