JP5726047B2 - Operation test apparatus and operation test method for high-voltage system protection equipment - Google Patents
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この発明は、高圧需要家内で発生した電気設備の事故に対して自動的に高圧母線を遮断して他の需要家への前記事故の影響を制限する負荷開閉器にそれぞれ搭載された零相電流検出器及び零相電圧検出器の各出力を入力する過電流蓄勢トリップ付地絡トリップ型開閉器制御装置に搭載された地絡方向継電器を含む総合的な動作試験をする高圧系統保護機器の動作試験装置及び動作試験方法に関するものである。 The present invention provides a zero-phase current mounted on each load switch that automatically shuts off the high-voltage bus and limits the influence of the accident on other consumers in response to an accident in the electrical equipment that occurs in the high-voltage consumer. Of high voltage system protection equipment that performs comprehensive operation test including ground fault direction relay mounted on ground fault trip type switch control device with overcurrent storage trip that inputs each output of detector and zero phase voltage detector The present invention relates to an operation test apparatus and an operation test method.
６．６ｋＶ気中負荷開閉器及び、過電流蓄勢トリップ付地絡トリップ型開閉器（ＳＯＧ）制御装置に搭載の地絡保護継電器（６７）は、保護対象回路の地絡時に発生する零相電圧をコンデンサ型零相電圧検出装置（ＺＰＤ）で検出し、零相電流を零相変流器（ＺＣＴ）で検出し、これらの零相電圧、零相電流の大きさ及び、位相関係から、保護対象回路の地絡事故か、外部事故かを判断し、地絡故障回線の切り離しを行う。 The ground fault protection relay (67) installed in the 6.6kV air load switch and the ground fault trip type switch (SOG) control device with overcurrent storage trip is a zero phase generated when the protection target circuit is grounded. The voltage is detected by a capacitor-type zero-phase voltage detector (ZPD), the zero-phase current is detected by a zero-phase current transformer (ZCT), and from the magnitude and phase relationship of these zero-phase voltage, zero-phase current, Determine whether the circuit to be protected has a ground fault or an external fault, and disconnect the ground fault line.
前記の通り、地絡方向継電器は零相電圧と零相電流の位相関係が重要である事から、コンデンサ型零相電圧検出装置（ＺＰＤ）、零相電流を零相変流器（ＺＣＴ）、地絡方向継電器までのケーブル及び、地絡方向継電器の動作を含めた総合的な動作確認が必要となる As described above, since the phase relationship between the zero-phase voltage and the zero-phase current is important for the ground fault relay, the capacitor-type zero-phase voltage detector (ZPD), the zero-phase current is converted into the zero-phase current transformer (ZCT), It is necessary to confirm the overall operation including the cable to the ground fault direction relay and the operation of the ground fault direction relay.
地絡方向継電器の総。同図においては、試験を実施するにあたり、運用停止状態にした高圧母線に繋がる負荷側回線を３相短絡し、試験用単相変圧器Ｔは低圧側が電圧調整器を介して試験用電源に接続され、試験用単相変圧器Ｔにより変圧比ｎで昇圧した対地試験電圧(地絡電圧)を印加する。変圧器Ｔの高圧側に試験用インピーダンス回路Ｚを設け高圧合試験を運用停止状態で実施する場合、特許文献１による動作試験回路の一例を図５に示す母線に接続し、試験用単相変圧器Ｔと試験用インピーダンス回路Ｚで構成される閉回路に流れる電流を零相変流器ＺＣＴに貫通させて接地する事により、零相変流器ＺＣＴに電流を流す。
接地計器用変圧器ＥＶＴ（またはコンデンサ型零相電圧検出装置ＺＰＤ）は、高圧母線に接続されて零相電圧を検出する。
地絡方向継電器は、零相変流器ＺＣＴ及び、接地計器用変圧器ＥＶＴ（またはコンデンサ型零相電圧検出装置ＺＰＤ）からの零相電流Ｉ０及び、零相電圧Ｖ０が入力され、地絡方向動作を行う。
Total of ground fault direction relays. In this figure, when conducting the test, the load-side line connected to the high-voltage bus that has been suspended is short-circuited in three phases, and the low-voltage side of the test single-phase transformer T is connected to the test power supply via the voltage regulator. A ground test voltage (ground fault voltage) boosted at a transformation ratio n by the test single-phase transformer T is applied. When a test impedance circuit Z is provided on the high-voltage side of the transformer T and the high-voltage joint test is carried out in an operation stop state, an example of an operation test circuit according to Patent Document 1 is connected to the bus shown in FIG. Current is passed through the zero-phase current transformer ZCT by passing the current flowing through the closed circuit composed of the transformer T and the test impedance circuit Z through the zero-phase current transformer ZCT and grounding it.
A grounding instrument transformer EVT (or a capacitor-type zero-phase voltage detector ZPD) is connected to a high-voltage bus to detect a zero-phase voltage.
The ground fault direction relay receives the zero phase current I0 and the zero phase voltage V0 from the zero phase current transformer ZCT and the grounding instrument transformer EVT (or the capacitor type zero phase voltage detector ZPD), and the ground fault direction Perform the action.
前述の特許文献１において、地絡電流は接地計器用変圧器ＥＶＴの制限抵抗及び、試験用インピーダンスＺが固定である事から地絡電圧と連動して変動する事となる。零相変流器ＺＣＴが貫通型の場合は、試験用電源で生成した電流を零相変流器ＺＣＴに貫通させ地絡電流の模擬を実施しているが、零相変流器ＺＣＴが装置搭載型の場合は、高圧主回路自体に地絡電流を流す必要がある。 In the aforementioned Patent Document 1, the ground fault current fluctuates in conjunction with the ground fault voltage because the limiting resistance of the earthing instrument transformer EVT and the test impedance Z are fixed. When the zero-phase current transformer ZCT is a through type, the current generated by the test power source is passed through the zero-phase current transformer ZCT to simulate the ground fault current. In the case of the on-board type, it is necessary to supply a ground fault current to the high-voltage main circuit itself.
従来の試験装置は以上のように構成されている為、次のような問題がある。
接地計器用変圧器ＥＶＴの制限抵抗及び、試験用インピーダンスＺの値は固定であり、地絡電流Ｉ０は印加電圧の大きさに比例して変動する為、地絡方向継電器の地絡電圧検出と、地絡電流検出を個別に確認する事ができない。すなわち、地絡電圧のみ検出時又は、地絡電流のみ検出時に地絡方向継電器の不動作を確認する事ができない。
Since the conventional test apparatus is configured as described above, it has the following problems.
The limit resistance of the earthing instrument transformer EVT and the value of the test impedance Z are fixed, and the ground fault current I0 varies in proportion to the magnitude of the applied voltage. The ground fault current detection cannot be confirmed individually. That is, it is not possible to confirm the malfunction of the ground fault direction relay when only the ground fault voltage is detected or only when the ground fault current is detected.
変圧器Ｔの高圧側に試験用インピーダンス回路Ｚを設け高圧母線に接続し、試験用単相変圧器Ｔと試験用インピーダンス回路Ｚで構成される閉回路に流れる電流を零相変流器ＺＣＴに貫通させて接地する事により、零相変流器ＺＣＴに電流を流している為、貫通型の零相変流器ＺＣＴでは回路構成が可能であるが、６．６ｋＶ気中負荷開閉器ＰＡＳ及び、過電流蓄勢トリップ付地絡トリップ型高圧開閉器制御装置ＳＯＧに搭載の地絡保護継電器のように零相変流器が６．６ｋＶ気中負荷開閉器ＰＡＳ内に搭載され、零相変流器ＺＣＴに貫通できない場合は、零相変流器ＺＣＴに電流を流す事ができず、地絡方向継電器を動作させる事ができない。
地絡方向継電器の方向性を確認する為、地絡電流の位相を振替えて継電器の動作、不動作を確認する必要があるが、その際、地絡電流の方向を入れ替える為、試験用単相変圧器Ｔの高圧側と高圧母線の接続を変更する必要があり、試験時間が長くなる。
試験回路に使用する設備、部品が独立しており、現地での試験回路及び、計測回路の構築などの所謂現地での試験装置の構築に時間がかかる。
過電圧を印加した場合、過大な地絡電流が流れるが、その際、過電流保護が無い為、試験回路を焼損させる可能性がある。
A test impedance circuit Z is provided on the high voltage side of the transformer T and connected to the high voltage bus, and the current flowing in the closed circuit composed of the test single phase transformer T and the test impedance circuit Z is transferred to the zero-phase current transformer ZCT. Since a current flows through the zero-phase current transformer ZCT by passing through and grounding, a circuit configuration is possible with the through-type zero-phase current transformer ZCT, but a 6.6 kV air load switch PAS and A zero-phase current transformer is installed in the 6.6kV air load switch PAS like the ground fault protection relay installed in the ground fault trip type high voltage switch controller SOG with overcurrent storage trip, and zero phase change If the current cannot pass through the current transformer ZCT, no current can flow through the zero-phase current transformer ZCT, and the ground fault direction relay cannot be operated.
In order to confirm the direction of the ground fault direction relay, it is necessary to check the operation and non-operation of the relay by changing the phase of the ground fault current. It is necessary to change the connection between the high voltage side of the transformer T and the high voltage bus, and the test time becomes longer.
The equipment and parts used for the test circuit are independent, and it takes time to construct a so-called local test circuit such as a local test circuit and a measurement circuit.
When an overvoltage is applied, an excessive ground fault current flows, but there is no overcurrent protection at that time, so there is a possibility of burning the test circuit.
この発明は、前述のような実情に鑑みてなされたもので、現地での試験装置の構築に時間がかからないようにすることを目的とするものである。 The present invention has been made in view of the above-described circumstances, and an object thereof is to prevent the construction of a test apparatus on site from taking time.
この発明に係る高圧系統保護機器の動作試験装置は、高圧需要家内で発生した電気設備の事故に対して自動的に高圧母線を遮断して他の需要家への前記事故の影響を制限する負荷開閉器にそれぞれ搭載された零相電流検出器及び零相電圧検出器の各出力を入力する過電流蓄勢トリップ付地絡トリップ型開閉器制御装置に搭載された地絡方向継電器を含む総合的な動作試験をする高圧系統保護機器の動作試験装置であって、一次側に電圧調整器を介して商用電源が接続される試験用単相変圧器、この試験用単相変圧器の二次側出力巻線の一端に一方の端子が前記二次側出力巻線の他端に他方の端子がそれぞれ接続され地絡電圧検出器が接続される地絡電圧検出端子、前記二次側出力巻線に直列に接続され地絡電流検出器が接続される地絡電流検出端子、前記高圧母線の前記負荷開閉器より電源側に接続される電源側出力端子、前記高圧母線の前記負荷開閉器より負荷側に接続される負荷側出力端子、及び選択的切り替えにより前記試験用単相変圧器の二次側出力巻線の前記一端及び前記他端と前記電源側出力端子及び前記負荷側出力端子との接続を切り替えることにより前記高圧母線に流れる試験用地絡電流の方向を電源側から負荷側への方向と負荷側から電源側への方向とに選択的に切り替える地絡電流方向切り替えスイッチを備えているものである。 The operation test apparatus for high-voltage system protection equipment according to the present invention is a load that automatically shuts off a high-voltage bus for an electrical equipment accident occurring in a high-voltage consumer and limits the influence of the accident on other consumers. Comprehensive including ground fault direction relay mounted on ground fault trip type switch control device with overcurrent storage trip that inputs each output of zero phase current detector and zero phase voltage detector mounted on each switch Operation test device for high-voltage system protection equipment that performs a proper operation test, a test single-phase transformer connected to the primary side via a voltage regulator, the secondary side of this test single-phase transformer One terminal at one end of the output winding and the other terminal at the other end of the secondary output winding, respectively, and a ground fault voltage detection terminal to which a ground fault voltage detector is connected, the secondary output winding A ground fault current detector connected in series with a ground fault current detector. A power supply side output terminal connected to the power supply side from the load switch of the high voltage bus, a load side output terminal connected to the load side of the load switch of the high voltage bus, and for the test by selective switching By switching the connection between the one end and the other end of the secondary side output winding of the single phase transformer and the power source side output terminal and the load side output terminal, the direction of the test ground fault current flowing in the high voltage bus is supplied as a power source. A ground fault current direction changeover switch that selectively switches between the direction from the load side to the load side and the direction from the load side to the power supply side is provided.
この発明は、高圧需要家内で発生した電気設備の事故に対して自動的に高圧母線を遮断して他の需要家への前記事故の影響を制限する負荷開閉器にそれぞれ搭載された零相電流検出器及び零相電圧検出器の各出力を入力する過電流蓄勢トリップ付地絡トリップ型開閉器制御装置に搭載される地絡方向継電器を含む総合的な動作試験をする高圧系統保護機器の動作試験装置であって、一次側に電圧調整器を介して商用電源が接続される試験用単相変圧器、この試験用単相変圧器の二次側出力巻線の一端に一方の端子が前記二次側出力巻線の他端に他方の端子がそれぞれ接続され地絡電圧検出器が接続される地絡電圧検出端子、前記二次側出力巻線に直列に接続され地絡電流検出器が接続される地絡電流検出端子、前記高圧母線の前記負荷開閉器より電源側に接続される電源側出力端子、前記高圧母線の前記負荷開閉器より負荷側に接続される負荷側出力端子、及び選択的切り替えにより前記試験用単相変圧器の二次側出力巻線の前記一端及び前記他端と前記電源側出力端子及び前記負荷側出力端子との接続を切り替えることにより前記高圧母線に流れる試験用地絡電流の方向を電源側から負荷側への方向と負荷側から電源側への方向とに選択的に切り替える地絡電流方向切り替えスイッチを備えているので、現地での試験装置の構築に時間がかからないという効果がある。 The present invention provides a zero-phase current mounted on each load switch that automatically shuts off the high-voltage bus and limits the influence of the accident on other consumers in response to an accident in the electrical equipment that occurs in the high-voltage consumer. Of high-voltage system protection equipment that conducts comprehensive operation tests including ground fault direction relay mounted on the ground fault trip type switch control device with overcurrent storage trip that inputs each output of detector and zero phase voltage detector An operation test device, a test single-phase transformer connected to a commercial power source via a voltage regulator on the primary side, and one terminal at one end of the secondary output winding of the test single-phase transformer A ground fault voltage detection terminal to which the other terminal is connected to the other end of the secondary output winding and a ground fault voltage detector is connected; a ground fault current detector connected in series to the secondary output winding A ground fault current detection terminal to which the load is connected, the load switch of the high voltage bus A power supply side output terminal connected to the power supply side, a load side output terminal connected to the load side from the load switch of the high voltage bus, and a secondary side output winding of the test single phase transformer by selective switching. By switching the connection between the one end and the other end of the wire and the power supply side output terminal and the load side output terminal, the direction of the test ground fault current flowing in the high voltage bus is changed from the power supply side to the load side. Since there is a ground fault current direction changeover switch that selectively switches from the direction to the power source side, there is an effect that it does not take time to construct a test apparatus in the field.
実施の形態１．
以下、この発明の実施の形態１を図に基づいて説明する。図１においては、電圧調整器ＳＤを介して接続された試験用単相変圧器Ｔの二次側を電流方向切替スイッチＳＷ、電流調整用可変抵抗Ｒ及び、過電流防止用固定抵抗ＲＬ、過電流防止用開閉器ＭＣＣＢを介して試験用単相変圧器Ｔの二次側に接続された試験装置の切替スイッチＳＷの両端から、６．６ｋＶ気中負荷開閉器６４の両端を３相短絡して接続し、電圧調整器ＳＤから商用電源に接続し、又、接地端子Ｅをアースearthに接続する。
Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings. In FIG. 1, the secondary side of the test single-phase transformer T connected through the voltage regulator SD is connected to the current direction changeover switch SW, the current adjustment variable resistor R, the overcurrent prevention fixed resistor RL, Three ends of the 6.6 kV
実施の形態１は、高圧需要家内で発生した電気設備の事故に対して自動的に高圧母線ＨＶＢを遮断して他の需要家への前記事故の影響を制限する負荷開閉器６４にそれぞれ搭載された零相電流検出器ＺＣＴ及び零相電圧検出器ＺＰＤの各出力を入力する過電流蓄勢トリップ付地絡トリップ型高圧開閉器制御装置ＳＯＧに搭載された地絡方向継電器６７を含む総合的な動作試験をする高圧系統保護機器の動作試験装置であって、本実施の形態１の高圧系統保護機器の動作試験装置は、一次側に電圧調整器ＳＤを介して商用電源ＣＰＳが接続される試験用単相変圧器Ｔ、この試験用単相変圧器Ｔの二次側出力巻線の一端に一方の端子が前記二次側出力巻線の他端に他方の端子がそれぞれ接続される地絡電圧検出端子Ｖ０Ｔ、前記二次側出力巻線に直列に接続され地絡電流検出器Ｉ０Ｓが接続される地絡電流検出端子Ｉ０Ｔ、前記高圧母線ＨＶＢの前記負荷開閉器６４より電源側に接続される電源側出力端子ＰＯＴ、前記高圧母線ＨＶＢの前記負荷開閉器６４より負荷側に接続される負荷側出力端子ＬＯＴ、及び選択的切り替えにより前記試験用単相変圧器Ｔの二次側出力巻線の前記一端及び前記他端と前記電源側出力端子ＰＯＴ及び前記負荷側出力端子ＬＯＴとの接続を切り替えることにより前記高圧母線ＨＶＢに流れる試験用地絡電流の方向を電源側から負荷側への方向と負荷側から電源側への方向とに選択的に切り替える地絡電流方向切り替えスイッチＳＷを一体的に備えている。
The first embodiment is mounted on each
また、本実施の形態１の高圧系統保護機器の動作試験装置では、地絡電流過電流防止用開閉器ＭＣＣＢが前記試験用単相変圧器Ｔの二次側出力巻線に直列に接続され、地絡電流過電流防止用抵抗ＲＬが前記試験用単相変圧器Ｔの二次側出力巻線に直列に接続され、地絡電流調整用抵抗Ｒが前記試験用単相変圧器Ｔの二次側出力巻線に直列に接続されている。 Further, in the operation test apparatus for the high-voltage system protection device of the first embodiment, the ground fault current overcurrent prevention switch MCCB is connected in series to the secondary output winding of the test single-phase transformer T, A ground fault current overcurrent prevention resistor RL is connected in series to the secondary output winding of the test single phase transformer T, and a ground fault current adjustment resistor R is a secondary of the test single phase transformer T. It is connected in series with the side output winding.
前記地絡電流過電流防止用開閉器ＭＣＣＢと前記地絡電流過電流防止用抵抗ＲＬと前記地絡電流調整用抵抗Ｒとが直列に接続され、この地絡電流過電流防止用開閉器ＭＣＣＢと地絡電流過電流防止用抵抗ＲＬと地絡電流調整用抵抗Ｒとの直列回路に前記地絡電流検出端子Ｉ０Ｔが直列に接続されている。 The ground fault current overcurrent prevention switch MCCB, the ground fault current overcurrent prevention resistor RL, and the ground fault current adjustment resistor R are connected in series. The ground fault current detection terminal I0T is connected in series to a series circuit of a ground fault current overcurrent prevention resistor RL and a ground fault current adjustment resistor R.
前記電源側出力端子ＰＯＴ及び前記負荷側出力端子ＬＯＴの何れも前記高圧母線ＨＶＢの各相に接続できる３個の端子である。
前記零相電流検出器ＺＣＴ、前記零相電圧検出器ＺＰＤ、及び前記地絡方向継電器６７の各動作の健全性は、前記過電流蓄勢トリップ付地絡トリップ型高圧開閉器制御装置ＳＯＧで総合的に判別される。
Each of the power supply side output terminal POT and the load side output terminal LOT is three terminals that can be connected to each phase of the high voltage bus HVB.
The soundness of each operation of the zero-phase current detector ZCT, the zero-phase voltage detector ZPD, and the ground
また、換言すれば、本実施の形態１は、高圧需要家内で発生した電気設備の事故に対して、自動的に電路を遮断して他の需要家への影響を最小限にする為の６．６ｋＶ気中負荷開閉器ＰＡＳと、それと組合わせて使用する過電流蓄勢トリップ付地絡トリップ型高圧開閉器制御装置ＳＯＧに搭載される地絡方向継電器６７を総合的に組合せて動作試験を行う為の装置であって、一般的に使用可能な商用電源ＣＰＳを使用し、零相電圧Ｖ０を調整する為の電圧調整回路、零相電流Ｉ０を調整する為の電流調整回路、地絡方向を切り替える為の切替回路、零相電圧、零相電流の計測回路、過電流保護回路が、地絡方向継電器の動作試験装置として一体化されたものである。
In other words, the first embodiment is a method for automatically shutting off the electric circuit and minimizing the influence on other consumers in response to an electrical equipment accident occurring in a high-voltage consumer. .6 kV air load switch PAS and ground
また、６．６ｋＶ気中負荷開閉器ＰＡＳ及び、過電流蓄勢トリップ付地絡トリップ型高圧開閉器制御装置ＳＯＧに搭載の地絡保護継電器６７用総合試験装置であり、６．６ｋＶの高圧用気中負荷開閉器ＰＡＳ及び、過電流蓄勢トリップ付地絡トリップ型高圧開閉器制御装置ＳＯＧに搭載の地絡保護継電器６７用の試験に係り、特に、一次回路、保護回路を合わせた総合動作を容易に実施できる試験装置である。
The 6.6 kV air load switch PAS and the ground fault trip type high voltage switch control device SOG with overcurrent accumulating trip are integrated test equipment for the ground
従来の方法に比べて６．６ｋＶ気中負荷開閉器及び、過電流蓄勢トリップ付地絡トリップ型高圧開閉器制御装置ＳＯＧに搭載の地絡保護継電器試験回路の構築が容易となると共に、試験回路の保護、零相電圧、零相電流の検出回路を個別に確認することができる試験装置である。 Compared to the conventional method, it is easier to build a ground fault protection relay test circuit installed in the 6.6 kV air load switch and the ground fault trip type high voltage switch controller with overcurrent storage trip SOG. This is a test apparatus that can individually check circuit protection, zero-phase voltage, and zero-phase current detection circuits.
６．６ｋＶ気中負荷開閉器及び、過電流蓄勢トリップ付地絡トリップ型高圧開閉器制御装置ＳＯＧに搭載の地絡保護継電器試験装置は、地絡電圧Ｖ０と地絡電流Ｉ０を個別に調整する為に、地絡電圧を調整する為の電圧調整回路の他に、地絡電流を調整する為の可変抵抗Ｒ、地絡電流方向切替用スイッチＳＷ、地絡電流過電流防止用固定抵抗ＲＬ、地絡電流過電流防止用開閉器ＭＣＣＢを設けたもので、これらを一体化したものである。 The ground fault protection relay test device installed in the 6.6kV air load switch and the ground fault trip type high voltage switch control device SOG with overcurrent storage trip adjusts the ground fault voltage V0 and the ground fault current I0 individually. In addition to the voltage adjustment circuit for adjusting the ground fault voltage, the variable resistor R for adjusting the ground fault current, the switch SW for changing the ground fault current direction, and the fixed resistor RL for preventing the ground fault current overcurrent. In addition, a ground fault current overcurrent prevention switch MCCB is provided, and these are integrated.
交流１００Ｖなどの商用電源に接続された電圧調整器ＳＤを介して試験用単相変圧器Ｔの高圧側を、３相短絡された６．６ｋＶ気中負荷開閉器ＰＡＳの両端の高圧母線に接続し、試験用単相変圧器Ｔの高圧側の片側を接地させるものである。 The high-voltage side of the test single-phase transformer T is connected to the high-voltage buses at both ends of the 6.6 kV air load switch PAS, which is short-circuited for three phases, via a voltage regulator SD connected to a commercial power source such as AC 100V. Then, one side of the high-voltage side of the test single-phase transformer T is grounded.
試験用単相変圧器Ｔの高圧側の回路内に設けられた可変抵抗Ｒによって、零相変流器に流れる地絡電流の大きさを任意に変更し、且つ、電圧調整器ＳＤによって、コンデンサ型零相電圧検出装置ＺＰＤに入力される地絡電圧の大きさを任意に変更できる The magnitude of the ground fault current flowing in the zero-phase current transformer is arbitrarily changed by the variable resistor R provided in the high-voltage side circuit of the test single-phase transformer T, and the voltage regulator SD Type ground phase voltage input to the zero-phase voltage detector ZPD can be arbitrarily changed
試験用単相変圧器Ｔの高圧側の回路内に設けられた可変抵抗Ｒによって、零相変流器に流れる地絡電流の大きさの任意に変更するが、誤って抵抗をゼロΩにした場合、過大な電流が流れ回路を焼損する可能性がある為、固定抵抗ＲＬを設け、過大電流防止を図る事を特徴とする。又、試験回路内の短絡等の事故電流が流れ、被試験回路への影響を防止する為、過電流防止用ＭＣＣＢを設けたものである。 The magnitude of the ground fault current flowing in the zero-phase current transformer is arbitrarily changed by the variable resistor R provided in the high-voltage side circuit of the test single-phase transformer T, but the resistance is accidentally set to zero Ω. In this case, since an excessive current flows and the circuit may be burned, a fixed resistor RL is provided to prevent the excessive current. In addition, an overcurrent prevention MCCB is provided in order to prevent an accidental current such as a short circuit in the test circuit from flowing and an influence on the circuit under test.
地絡電流の方向を試験回路の解線、再接続をすることなく変更できるようにするため、試験用単相変圧器Ｔの高圧側の回路内に設けられた地絡電流方向切替スイッチＳＷを設け容易に地絡電流の方向を変更できるようにしたものである。 In order to be able to change the direction of the ground fault current without disconnecting and reconnecting the test circuit, the ground fault current direction selector switch SW provided in the circuit on the high voltage side of the test single-phase transformer T is provided. The direction of the ground fault current can be changed easily.
次に動作について説明する。参考として、一般的に、６．６ｋＶ気中負荷開閉器ＰＡＳ及び、過電流蓄勢トリップ付地絡トリップ型高圧開閉器制御装置ＳＯＧに搭載の地絡保護継電器６７の地絡電圧Ｖ０検出は６６００／√３の２％から１０％程度であり、２％の整定であれば７６Ｖ程度、１０％の整定であれば３８１Ｖ程度になるように、計測端子Ｖ０Ｔに接続された電圧計ＶＯＳを見ながら、電圧調整器ＳＤを調節し、試験地絡電圧Ｖ０の検出動作を確認する。又、試験地絡電圧Ｖ０のみの検出では、地絡方向継電器６７は不動作である事を確認する。その後、試験地絡電圧Ｖ０が検出しなくなるまで、電圧調整器ＳＤを調節する。
Next, the operation will be described. As a reference, in general, the ground fault voltage V0 detection of the ground
次に、地絡電流要素の検出確認であるが、一般的に、６．６ｋＶ気中負荷開閉器ＰＡＳ及び、過電流蓄勢トリップ付地絡トリップ型高圧開閉器制御装置ＳＯＧに搭載の地絡保護継電器６７の地絡電流Ｉ０検出は、０．２Ａから０．６Ａ程度であり、０．２Ａの整定の場合は、計測端子Ｉ０Ｔに接続された電流計Ｉ０Ｓを見ながら、可変抵抗器Ｒを調節し、試験地絡電流Ｉ０の検出動作を確認する。試験地絡電流Ｉ０のみの検出では、地絡方向継電器６７は不動作である事を確認する。
Next, detection of the ground fault current element will be confirmed. Generally, a ground fault mounted on the 6.6 kV air load switch PAS and the ground fault trip type high voltage switch control device SOG with an overcurrent storage trip is installed. The ground fault current I0 detection of the
再度、電圧調整器ＳＤを調節し、試験地絡電圧Ｖ０と試験地絡電流Ｉ０を両方検出させ、且つ、試験地絡電流Ｉ０の方向が、６．６ｋＶ気中負荷開閉器ＰＡＳの電源側から負荷側に流れている場合、地絡方向継電器６７が動作する事を確認する。
The voltage regulator SD is adjusted again to detect both the test ground fault voltage V0 and the test ground fault current I0, and the direction of the test ground fault current I0 is from the power supply side of the 6.6 kV air load switch PAS. When it is flowing to the load side, it is confirmed that the ground
地絡方向継電器６７が動作時、図２のとおり、地絡電流方向切替スイッチＳＷを選択切替操作し、試験地絡電流Ｉ０の方向が６．６ｋＶ気中負荷開閉器ＰＡＳの負荷側から電源側に流れている場合、地絡方向継電器６７が動作しない事を確認する。
When the ground
本実施の形態１は、前述のような高圧系統保護機器の動作試験装置を使用し、前記電源側出力端子ＰＯＴを前記高圧母線ＨＶＢの前記負荷開閉器６４より電源側に接続すると共に、前記負荷側出力端子ＬＯＴを前記高圧母線ＨＶＢの前記負荷開閉器６４より負荷側に接続して、前記零相電流検出器ＺＣＴ、前記零相電圧検出器ＺＰＤ、及び前記地絡方向継電器６７の各動作の健全性を総合的に判別する高圧系統保護機器の動作試験方法でもある。
The first embodiment uses the operation test apparatus for the high-voltage system protection device as described above, and connects the power supply side output terminal POT to the power supply side from the
本実施の形態１によれば、６．６ｋＶ気中負荷開閉器ＰＡＳと、それと組合わせて使用する過電流蓄勢トリップ付地絡トリップ型開閉器制御装置ＳＯＧに搭載される地絡方向継電器６７の総合動作試験では、試験回路の構築に時間がかかり、試験時の配線変更により配線間違い及び、操作誤りによる試験回路への損傷が懸念され、又、地絡方向継電器の各検出回路の個別の動作確認が考慮されていなかったという従来の諸問題を解決できる。
According to the first embodiment, a ground
零相電圧Ｖ０を調整する為の電圧調整回路、零相電流Ｉ０を調整する為の電流調整回路、地絡方向を切り替える為の切替回路、零相電圧、零相電流の計測回路、過電流保護回路が、地絡方向継電器の動作試験装置として一体化されている為、各部品、設備間の接続、配線が不要となる為、試験準備時間の短縮を図る事ができる。従来方法に比べて試験回路構築が容易になると共に、試験時の回路切替も不要となる為、試験時間の短縮が図ることができる。 Voltage adjustment circuit for adjusting zero-phase voltage V0, current adjustment circuit for adjusting zero-phase current I0, switching circuit for switching the ground fault direction, zero-phase voltage and zero-phase current measurement circuit, overcurrent protection Since the circuit is integrated as an operation test device for a ground fault direction relay, connection between components and equipment and wiring are not required, so that the test preparation time can be shortened. Compared to the conventional method, the test circuit can be easily constructed, and the circuit switching at the time of the test becomes unnecessary, so that the test time can be shortened.
地絡電圧Ｖ０と、地絡電流Ｉ０を個別に変化させる事が可能である為、地絡方向継電器の電圧要素と電流要素を個別に検出させて、地絡方向継電器が動作しない事を確認する事が可能となる。 Since the ground fault voltage V0 and the ground fault current I0 can be changed individually, the voltage element and the current element of the ground fault direction relay are individually detected, and it is confirmed that the ground fault direction relay does not operate. Things will be possible.
地絡電流Ｉ０の方向を切り替える際、切替スイッチＳＷの操作のみで行える事から、試験回路の解線、再接続が不要となり、試験時間の短縮が図れる。 When the direction of the ground fault current I0 is switched, it can be performed only by operating the changeover switch SW. Therefore, it is not necessary to disconnect or reconnect the test circuit, and the test time can be shortened.
操作ミスによる過電流防止の為の固定抵抗ＲＬの設置と、試験回路短絡等の事故による過電流防止の為のＭＣＣＢを設けている為、異常発生時の被試験回路及び、試験回路の影響を最小限にする事が可能となり、又、人的にも安全となる。 Installation of fixed resistor RL to prevent overcurrent due to operation error and MCCB for prevention of overcurrent due to accident such as short circuit of test circuit, etc. It can be minimized, and it is safe for humans.
万が一、地絡電流調整用可変抵抗器Ｒの操作を誤り、ゼロΩにしたとしても、過電流防止用固定抵抗ＲＬがある為、過大電流が流れる事を防止できる。又、計測回路の短絡、地絡等により、過大な電流が流れた場合においても、過電流防止用ＭＣＣＢが開放する事により、被試験回路、試験回路の電流を開放し、焼損等を防止する事ができる。 Even if the operation of the variable resistor R for adjusting the ground fault current is erroneously set to zero Ω, it is possible to prevent an excessive current from flowing because of the fixed resistor RL for preventing the overcurrent. In addition, even when an excessive current flows due to a short circuit or ground fault in the measurement circuit, the overcurrent prevention MCCB is opened, thereby opening the current under test and the test circuit to prevent burning. I can do things.
実施の形態２．
以下、この発明の実施の形態２を図に基づいて説明する。図３においては、電圧調整器ＳＤを介して接続された試験用単相変圧器Ｔの二次側を電流方向切替スイッチ、電流調整用可変抵抗Ｒ及び、過電流防止用固定抵抗ＲＬ、過電流防止用開閉器ＭＣＣＢを介して試験用単相変圧器Ｔの二次側に接続された試験装置の切替スイッチＳＷの負荷側から、６．６ｋＶ気中負荷開閉器の負荷側を３相短絡して接続し、６．６ｋＶ気中負荷開閉器の電源側に接続されている接地計器用変圧器ＥＶＴのアースを介して回路を構成する。又、電圧調整器ＳＤから商用電源に接続し、接地端子Ｅをアースに接続する。
Embodiment 2. FIG.
The second embodiment of the present invention will be described below with reference to the drawings. In FIG. 3, the secondary side of the test single-phase transformer T connected via the voltage regulator SD is connected to the current direction changeover switch, the current adjustment variable resistor R, the overcurrent prevention fixed resistor RL, and the overcurrent. Three-phase short-circuit the load side of the 6.6kV air load switch from the load side of the changeover switch SW of the test device connected to the secondary side of the test single-phase transformer T via the prevention switch MCCB. The circuit is configured through the ground of the earthing instrument transformer EVT connected to the power source side of the 6.6 kV air load switch. Further, the voltage regulator SD is connected to a commercial power source, and the ground terminal E is connected to the ground.
本実施の形態２では、地絡電圧Ｖ０、地絡電流Ｉ０の調節方法、地絡方向継電器の動作確認方法、過電流発生時の保護方法は実施の形態１と同様であるが、本設計器である接地計器用変圧器ＥＶＴと本設ケーブルを介して、地絡電流Ｉ０を流す為、各本設計器を含めた総合動作を確認する事が可能となる。 In the second embodiment, the ground fault voltage V0, the ground fault current I0 adjustment method, the ground fault direction relay operation confirmation method, and the overcurrent occurrence protection method are the same as in the first embodiment. Since the ground fault current I0 is caused to flow through the grounding instrument transformer EVT and the main cable, it is possible to check the total operation including each main design device.
地絡電流の方向は、接地計器用変圧器ＥＶＴが６．６ｋＶ気中負荷開閉器の負荷側若しくは電源側に接続されるかで決まるが、負荷側に接続された場合は、図４のとおり、零相変流器ＺＣＴの試験端子を使用して、零相変流器ＺＣＴに適切な電流を流す。尚、これら図３、図４の接続では高圧母線への接続が片側で良い為、試験準備時間の短縮を図る事ができる。 The direction of the ground fault current is determined by whether the earthing instrument transformer EVT is connected to the load side or the power supply side of the 6.6 kV air load switch. When it is connected to the load side, as shown in FIG. Using the test terminal of the zero-phase current transformer ZCT, an appropriate current is passed through the zero-phase current transformer ZCT. 3 and 4 can be connected to the high-voltage bus on one side, the test preparation time can be shortened.
６．６ｋＶ気中負荷開閉器ＰＡＳと接地計器用変圧器ＥＶＴを組合せた回路で接地計器用変圧器ＥＶＴ経由で地絡電流を流す場合に、試験回路を切り替えることで、ＥＶＴの設置箇所に関わらず、容易に地絡電流を流すことができる地絡方向継電器の動作試験装置である。 When a ground fault current is passed through a grounding instrument transformer EVT in a circuit that combines a 6.6kV air load switch PAS and a grounding instrument transformer EVT, switching the test circuit will affect the installation location of the EVT. It is an operation test device for a ground fault direction relay that can easily cause a ground fault current to flow.
本実施の形態２は、図３の例によれば、前述の実施の形態１の動作試験装置を使用し、接地計器用変圧器ＥＶＴを前記高圧母線ＨＶＢの前記負荷開閉器６４より電源側に接続すると共に、前記負荷側出力端子ＬＯＴを前記高圧母線ＨＶＢの前記負荷開閉器６４より負荷側に接続して、前記零相電流検出器ＺＣＴ、前記零相電圧検出器ＺＰＤ、及び前記地絡方向継電器６７の各動作の健全性を総合的に判別する高圧系統保護機器の動作試験方法である。
In the second embodiment, according to the example of FIG. 3, the operation test apparatus of the first embodiment is used, and the grounding instrument transformer EVT is connected to the power supply side from the
また、図４の例によれば、前述の実施の形態１の動作試験装置を使用し、接地計器用変圧器ＥＶＴを前記高圧母線ＨＶＢの前記負荷開閉器６４より負荷側に接続すると共に、前記負荷側出力端子ＬＯＴを前記高圧母線ＨＶＢの前記負荷開閉器６４より負荷側に接続して、前記零相電流検出器ＺＣＴ、前記零相電圧検出器ＺＰＤ、及び前記地絡方向継電器６７の各動作の健全性を総合的に判別する高圧系統保護機器の動作試験方法である。
Further, according to the example of FIG. 4, the operation test apparatus of the first embodiment described above is used, and the grounding instrument transformer EVT is connected to the load side from the
なお、本発明は、その発明の範囲内において、各実施の形態を適宜、変形、省略することができる。
なお、各図中、同一符合は同一または相当部分を示す。
In the present invention, each embodiment can be appropriately modified or omitted within the scope of the invention.
In addition, in each figure, the same code | symbol shows the same or an equivalent part.
６４ 負荷開閉器、
６７ 地絡方向継電器、
ＣＰＳ 商用電源、
ＥＶＴ 接地計器用変圧器、
ＨＶＢ 高圧母線、
Ｉ０ 地絡電流、
Ｉ０Ｓ 地絡電流検出器、
Ｉ０Ｔ 地絡電流検出端子、
ＬＯＴ 負荷側出力端子、
ＭＣＣＢ 過電流保護用開閉器、
ＰＡＳ ６．６ｋＶ気中負荷開閉器、
ＰＯＴ 電源側出力端子、
Ｒ 可変抵抗器、
ＲＬ 過電流防止用固定抵抗器、
ＳＤ 電圧調整器、
ＳＯＧ 過電流蓄勢トリップ付地絡トリップ型高圧開閉器制御装置、
ＳＷ 地絡電流方向切替スイッチ、
Ｔ 試験用単相変圧器、
Ｖ０ 地絡電圧、
Ｖ０Ｓ 地絡電圧検出器、
Ｖ０Ｔ 地絡電圧検出端子
ＺＣＴ 零相変流器、
ＺＰＤ 零相電圧検出器。
64 Load switch,
67 Ground fault direction relay,
CPS commercial power,
EVT earthing instrument transformer,
HVB high pressure bus,
I0 Ground fault current,
I0S ground fault current detector,
I0T ground fault current detection terminal,
LOT load side output terminal,
MCCB overcurrent protection switch,
PAS 6.6kV air load switch,
POT power supply side output terminal,
R variable resistor,
RL fixed resistor for overcurrent prevention,
SD voltage regulator,
SOG ground fault trip type high voltage switch control device with overcurrent storage trip,
SW Ground fault current direction switch,
T single phase transformer for testing,
V0 ground fault voltage,
V0S ground fault voltage detector,
V0T Ground fault voltage detection terminal ZCT Zero-phase current transformer,
ZPD Zero phase voltage detector.
Claims (11)
一次側に電圧調整器を介して商用電源が接続される試験用単相変圧器、
この試験用単相変圧器の二次側出力巻線の一端に一方の端子が前記二次側出力巻線の他端に他方の端子がそれぞれ接続され地絡電圧検出器が接続される地絡電圧検出端子、
前記二次側出力巻線に直列に接続され地絡電流検出器が接続される地絡電流検出端子、
前記高圧母線の前記負荷開閉器より電源側に接続される電源側出力端子、
前記高圧母線の前記負荷開閉器より負荷側に接続される負荷側出力端子、及び
選択的切り替えにより前記試験用単相変圧器の二次側出力巻線の前記一端及び前記他端と前記電源側出力端子及び前記負荷側出力端子との接続を切り替えることにより前記高圧母線に流れる試験用地絡電流の方向を電源側から負荷側への方向と負荷側から電源側への方向とに選択的に切り替える地絡電流方向切り替えスイッチ、
を備えていることを特徴とする高圧系統保護機器の動作試験装置。 Zero-phase current detectors and zeros mounted on load switches that automatically shut off the high-voltage bus and limit the impact of the accident on other customers in response to an electrical equipment accident that occurs in a high-voltage consumer An operation test device for high-voltage system protection equipment that performs comprehensive operation tests including a ground fault direction relay mounted on a ground fault trip type switch control device with an overcurrent storage trip that inputs each output of the phase voltage detector There,
A test single-phase transformer with a commercial power supply connected to the primary side via a voltage regulator,
A ground fault in which one terminal is connected to one end of the secondary output winding of the test single-phase transformer and the other terminal is connected to the other end of the secondary output winding, respectively, and a ground fault voltage detector is connected. Voltage detection terminal,
A ground fault current detection terminal connected in series to the secondary output winding and connected to a ground fault current detector,
A power supply side output terminal connected to the power supply side from the load switch of the high voltage bus,
A load side output terminal connected to the load side from the load switch of the high voltage bus, and the one end and the other end of the secondary side output winding of the test single phase transformer and the power source side by selective switching By switching the connection between the output terminal and the load-side output terminal, the direction of the test ground fault current flowing in the high-voltage bus is selectively switched from the power supply side to the load side and from the load side to the power supply side. Earth fault current direction switch,
An operation test apparatus for high-voltage system protection equipment, comprising:
地絡電流過電流防止用開閉器が、前記試験用単相変圧器の二次側出力巻線に直列に接続されている
ことを特徴とする高圧系統保護機器の動作試験装置。 In the operation test apparatus for the high-voltage system protection device according to claim 1,
An operation test apparatus for a high-voltage system protection device, wherein a ground fault current overcurrent prevention switch is connected in series to a secondary output winding of the test single-phase transformer.
地絡電流過電流防止用抵抗が、前記試験用単相変圧器の二次側出力巻線に直列に接続されている
ことを特徴とする高圧系統保護機器の動作試験装置。 In the operation test device for the high-voltage system protection device according to claim 2,
A ground fault current overcurrent prevention resistor is connected in series to the secondary output winding of the test single-phase transformer.
地絡電流調整用抵抗が、前記試験用単相変圧器の二次側出力巻線に直列に接続されている
ことを特徴とする高圧系統保護機器の動作試験装置。 In the operation test apparatus for the high-voltage system protection device according to claim 3,
A ground fault current adjustment resistor is connected in series to the secondary output winding of the test single-phase transformer.
前記地絡電流過電流防止用開閉器と前記地絡電流過電流防止用抵抗と前記地絡電流調整用抵抗とが直列に接続されている
ことを特徴とする高圧系統保護機器の動作試験装置。 In the operation test device for the high-voltage system protection device according to claim 4,
The ground fault current overcurrent prevention switch, the ground fault current overcurrent prevention resistance, and the ground fault current adjustment resistance are connected in series, and the operation test apparatus for high voltage system protection equipment.
前記地絡電流過電流防止用開閉器と前記地絡電流過電流防止用抵抗と前記地絡電流調整用抵抗との直列回路に前記地絡電流検出端子が直列に接続されている
ことを特徴とする高圧系統保護機器の動作試験装置。 In the operation test apparatus for the high-voltage system protection device according to claim 5,
The ground fault current detection terminal is connected in series to a series circuit of the ground fault current over current prevention switch, the ground fault current over current prevention resistor, and the ground fault current adjusting resistor. Operation test equipment for high-voltage system protection equipment.
前記電源側出力端子及び前記負荷側出力端子の何れも前記高圧母線の各相に接続できる３個の端子である
ことを特徴とする高圧系統保護機器の動作試験装置。 In the operation test device for the high-voltage system protection device according to claim 6,
An operation test apparatus for high-voltage system protection equipment, wherein each of the power supply side output terminal and the load side output terminal is three terminals that can be connected to each phase of the high voltage bus.
前記零相電流検出器、前記零相電圧検出器、及び前記地絡方向継電器の各動作の健全性が前記過電流蓄勢トリップ付地絡トリップ型開閉器制御装置で総合的に判別される
ことを特徴とする高圧系統保護機器の動作試験装置。 In the operation test apparatus for the high-voltage system protection device according to any one of claims 1 to 7,
Soundness of each operation of the zero-phase current detector, the zero-phase voltage detector, and the ground fault direction relay is comprehensively determined by the ground fault trip type switch control device with an overcurrent storage trip. Operation test equipment for high-voltage system protection equipment characterized by
前記電源側出力端子を前記高圧母線の前記負荷開閉器より電源側に接続すると共に、前記負荷側出力端子を前記高圧母線の前記負荷開閉器より負荷側に接続して、
前記零相電流検出器、前記零相電圧検出器、及び前記地絡方向継電器の各動作の健全性を総合的に判別する
ことを特徴とする高圧系統保護機器の動作試験方法。 Using the operation test device for the high-voltage system protection device according to any one of claims 1 to 7,
The power supply side output terminal is connected to the power supply side from the load switch of the high voltage bus, and the load side output terminal is connected to the load side of the load switch of the high voltage bus,
An operation test method for a high-voltage system protection device, which comprehensively determines the soundness of each operation of the zero-phase current detector, the zero-phase voltage detector, and the ground fault direction relay.
接地計器用変圧器を前記高圧母線の前記負荷開閉器より電源側に接続すると共に、前記負荷側出力端子を前記高圧母線の前記負荷開閉器より負荷側に接続して、
前記零相電流検出器、前記零相電圧検出器、及び前記地絡方向継電器の各動作の健全性を総合的に判別する
ことを特徴とする高圧系統保護機器の動作試験方法。 Using the operation test device for the high-voltage system protection device according to any one of claims 1 to 7,
A grounding instrument transformer is connected to the power supply side from the load switch of the high-voltage bus, and the load-side output terminal is connected to the load side from the load switch of the high-voltage bus,
An operation test method for a high-voltage system protection device, which comprehensively determines the soundness of each operation of the zero-phase current detector, the zero-phase voltage detector, and the ground fault direction relay.
接地計器用変圧器を前記高圧母線の前記負荷開閉器より負荷側に接続すると共に、前記負荷側出力端子を前記高圧母線の前記負荷開閉器より負荷側に接続して、
前記零相電流検出器、前記零相電圧検出器、及び前記地絡方向継電器の各動作の健全性を総合的に判別する
ことを特徴とする高圧系統保護機器の動作試験方法。
Using the operation test device for the high-voltage system protection device according to any one of claims 1 to 7,
A grounding instrument transformer is connected to the load side from the load switch of the high-voltage bus, and the load-side output terminal is connected to the load side from the load switch of the high-voltage bus,
An operation test method for a high-voltage system protection device, which comprehensively determines the soundness of each operation of the zero-phase current detector, the zero-phase voltage detector, and the ground fault direction relay.
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