JPWO2018131797A5

JPWO2018131797A5 -

Info

Publication number: JPWO2018131797A5
Application number: JP2019558318A
Authority: JP
Publication date: 2022-12-23
Anticipated expiration: 2037-12-11

Description

前記故障検出器としては、前記中性点または電力線から出力される故障発生電気信号を検出するために、電子リレー（ＳＳＲ）、零相変流器、電圧検出器、電流検出器、またはリレーを使用することができる。
The fault detector may be an electronic relay (SSR), a zero-phase current transformer , a voltage detector, a current detector, or a relay to detect fault-occurring electrical signals output from the neutral point or power line. can be used.

また、前記復旧配電系統１５０の線路Ｒ１、Ｒ２からの漏電（地絡）が発生すると、漏電した回路にのみ漏れ電流が流れるようになり、負荷側探知／復旧器２３０の復旧電力によって漏れ電流が供給されるので、負荷側探知／復旧器２３０の入出力線路を零相変流器で監視するか、負荷側探知／復旧器２３０のＮ２端子と接続されている接地Ｅ線を零相変流器で監視すると、漏れ電流を検出することができる。または、負荷側探知／復旧器２３０のＮ２端子と接地とを接続せず、電圧により漏電のみを検出する方法を取ってもよい。
Further, when an earth leakage (ground fault) occurs from the lines R1 and R2 of the restoration distribution system 150, the leakage current flows only in the circuit where the leakage occurred, and the restoration power of the load side detector/restorer 230 causes the leakage current to flow. Therefore, the input/output line of the load-side detector/restorer 230 is monitored by a zero-phase current transformer , or the ground E line connected to the N2 terminal of the load-side detector/restorer 230 is connected to the zero-phase current transformer . leakage current can be detected. Alternatively, the N2 terminal of the load-side detector/restorer 230 may not be connected to the ground, and only the leakage may be detected by the voltage.

Claims

In the system to prevent disconnection on the power supply side of the distribution system, increase in resistance, contact failure, partial disconnection, power failure due to electric leakage, electric shock, fire accident,
The distribution system is provided with a power source side detector/restorer and a load side detector/restorer,
The power-side detector/recovery device is configured by constructing a neutral point in the middle of the power supply output coil and grounding this neutral point to the ground, or by detecting the potential difference between the neutral point and the ground to Or at the time of loss of phase, disconnection, poor contact, or increase in resistance in the power supply line of the three-phase power supply, perform one or more of restoration, cutoff, and alarm,
The load-side detector/restorer configures a neutral point in the middle of the power supply output coil and grounds this neutral point to the ground, or connects it to the neutral point of the power-side detector/restorer; By detecting the potential difference between the neutral point and the ground, any one of recovery, cutoff, and alarm will be performed in the event of phase failure, disconnection, poor contact, or increased resistance in the power supply line of a single-phase or three-phase power supply. In the real-time detection/restoration system in the event of a distribution system power line failure characterized by performing the above,
The load side detector/restorer
By grounding the neutral point of the load-side detector/restorer to the ground and constructing the single-phase power supply line with one line, short-circuit accidents due to the line are prevented, and leakage of electricity is reduced, line failure is reduced, and the line It is characterized by easy maintenance and reduced construction costs,
In addition, the load side detector/restorer
If an electrical failure occurs due to disconnection, increased resistance, poor contact, partial disconnection, or earth leakage (ground fault) on the power supply side of the load side detector/restorer, the load side detector/restorer is neutral. characterized by generating an electrical signal at a point and ground or power line (R, S, or T) and transmitting it to a fault detector,
In addition, the power supply side detector/restorer and the load side detector/restorer are
By forming a neutral with an element electrically/electronically connected to a single-phase or three-phase power supply and grounding this neutral to earth or detecting the potential difference between this neutral and earth, A power line failure in a distribution system characterized by performing one or more of recovery, disconnection, and alarm when phase loss, disconnection, contact failure, or resistance increase in a single-phase or three-phase power supply line. Real time detection/recovery system.

The element is
2. The real-time detection/detection of power line failure in the power distribution system according to claim 1, comprising at least one selected from inductors, resistors, capacitors, varistors, silicon or germanium, carbon, coils, and integrated circuits. recovery system.

The fault detector is
Detecting the electrical signal generated when the power line or neutral point of the input/output line of the load side detector/restorer fails, disconnection, increase in resistance, contact failure, partial disconnection, or earth leakage (ground fault) When the occurrence of is detected, an alarm is issued using an alarm generator, a circuit breaker is used to interrupt, or the load side detector/restorer is used to restore in real time. Item 2. A real-time detection/restoration system for a distribution system power line failure according to item 1.

As the fault detector,
An electronic relay (SSR), a zero-phase current transformer, a voltage detector, a current detector, or a relay is used to detect the fault-occurring electrical signal output from the neutral point or power line. The real-time detection/recovery system for power distribution system power line failure according to claim 1.

The power side detector/restorer
Leakage occurs by constructing a neutral point in the middle of the coil that supplies power from the power supply side detector/restorer and grounding it to the ground so that the potential difference between the power supply line and the ground can be kept constant. 2. The real-time detection/recovery system according to claim 1, which prevents the occurrence of electric shocks and fire accidents caused by failures in the power lines of the distribution system.

The power side detector/restorer
It is connected to a distribution system having a load line of a single-phase three-wire system or a three-phase four-wire system, and prevents the inflow of unbalanced overvoltage when the neutral wire of the distribution system is disconnected, thereby fundamentally preventing overheating and fire. 2. The real-time detection/recovery system of claim 1, wherein the real-time detection/recovery system in the event of a distribution system power line failure.

In a system equipped with a power supply side detector/restorer and a load side detector/restorer in a distribution system to prevent disconnection on the power supply side, increased resistance, contact failure, partial disconnection, power failure due to electric leakage, electric shock, and fire accident. ,
the power side detector/restorer comprises a first leg, a second leg and a third leg; a first winding, a second winding and a third winding;
The first winding is wrapped around the first leg, the second winding is wrapped around the third leg, and the third winding is wrapped around the first winding and the second winding. one end of each of the first, second and third windings is connected to a neutral wire. , an intermediate tap for supplying a single-phase power supply is included between the first winding, the second winding, or the third winding connected to the neutral wire. A real-time detection/recovery system for power line failures in the distribution system.

The power supply side detector/restorer determines whether the R phase, S phase, T phase, or neutral line N is disconnected on the power supply side due to lightning strikes, short circuits, ground faults, equipment burnout, and fuse disconnection in the power distribution system. Even if there is a phase loss, it restores electrical failures in real time, supplies single-phase power to prevent power outages in the single-phase power supply, and steps down the potential difference between the single-phase power supply and the ground to reduce electric shock due to leakage (ground fault). 8. The real-time detection/recovery system of claim 7, which is capable of preventing fire outbreaks.

The power supply side detector/restorer grounds the neutral point to the ground and maintains the potential difference between the power supply line and the ground at a constant potential, thereby preventing electric shocks and fire accidents due to leakage. 8. The real-time detection/recovery system of claim 7, wherein the system is capable of

The load-side detection/recovery device has a neutral point grounded to the ground, and a single-phase power supply line is composed of one line, thereby preventing short-circuit accidents caused by the line, reducing leakage, reducing line failure, 8. The real-time detection/recovery system according to claim 7, which facilitates track maintenance and reduces construction costs.

The load-side detector/restorer connects the neutral point to the neutral point of the power-side detector/restorer to prevent disconnection, contact failure, partial disconnection, or earth leakage on the power supply side of the load-side detector/restorer. When an electrical fault occurs due to a (ground fault), an electrical signal is generated in the power line (R, S, or T) or neutral point of the load side detector/recovery device and transmitted to the fault detector. 8. The real-time detection/recovery system of claim 7, wherein:

The power-side detector/restorer and the load-side detector/restorer constitute a neutral point with an element electrically/electronically connected to a single-phase or three-phase power supply, and the neutral point is grounded to the ground. , By detecting the potential difference between this neutral point and the ground, when phase loss, disconnection, contact failure, or resistance increase in the power supply line of single-phase or three-phase power supply, recovery, shutdown, alarm, notification, and control 8. The real-time detection/recovery system of claim 7, wherein any one or more of:

The element is
13. The real-time detection/recovery system of claim 12, comprising one or more selected from inductors, resistors, capacitors, varistors, silicon or germanium, carbon, coils, and integrated circuits.

The fault detector is
Detecting an electrical signal generated at the time of failure of the power line or the second neutral point provided in the input/output line of the load side detector/restorer, disconnection, resistance increase, contact failure, half disconnection, or earth leakage When the occurrence of a fault is detected, an alarm is issued using an alarm generator, a circuit breaker is used to cut off, or the load side detector/restorer is used to restore in real time. 12. The real-time detection/recovery system in case of power distribution system power line failure according to claim 11 .

The fault detector is
An electronic relay (SSR), a zero-phase current transformer , a voltage detector, a current detector, or a relay is used to detect the fault-occurring electrical signal output from the neutral point or power line. The real-time detection/recovery system for distribution system power line failure according to claim 11.

The power side detector/restorer
It is connected to a distribution system having a load line of a single-phase three-wire system or a three-phase four-wire system, and prevents inflow of unbalanced overvoltage when the neutral line of the distribution system is disconnected, thereby fundamentally preventing overheating and fire. 8. The real-time detection/recovery system for distribution system power line faults according to claim 7, characterized in that it prevents.

The power side detector/restorer
Connected to a 3-phase or 3-phase 4-wire distribution system, on the power supply side, real-time 3 8. The power distribution system according to claim 7, characterized in that by recovering the phase power and supplying the single-phase power supply to the load side without power failure, the power failure of the single-phase power supply due to an electrical failure is fundamentally prevented. Real-time detection/recovery system for power line failures.