PL88136B1 - - Google Patents
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- Publication number
- PL88136B1 PL88136B1 PL17561274A PL17561274A PL88136B1 PL 88136 B1 PL88136 B1 PL 88136B1 PL 17561274 A PL17561274 A PL 17561274A PL 17561274 A PL17561274 A PL 17561274A PL 88136 B1 PL88136 B1 PL 88136B1
- Authority
- PL
- Poland
- Prior art keywords
- transformer
- current relay
- choke
- generator
- power switch
- Prior art date
Links
- 238000004804 winding Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Emergency Protection Circuit Devices (AREA)
Description
Przedmiotem wynalazku jest uklad do zabezpieczania elementów sieci elektroenergetycznej, zwlaszcza do bloków generator -transformator, przed skutkami zwarc, umozliwiajacy zabezpieczenie poszczególnych elemen¬ tów znajdujacych sie pod napieciem, jak i wylaczonych spod napiecia.The subject of the invention is a system for securing power network elements, in particular to generator-transformer blocks, against the effects of short circuits, enabling protection of individual elements energized as well as de-energized.
W ukladach zabezpieczajacych elementy sieci elektroenergetycznej, wykorzystuje sie oddzialywanie lub pomiar okreslonych wielkosci elektrycznych tych sieci.In the systems protecting the elements of the power grid, interaction or measurement of specific electrical quantities of these networks.
Znane uklady do zabezpieczania elementów sieci elektroenergetycznej zawieraja przekladniki napieciowe i pradowe, których uzwojenia wtórne polaczone sa z urzadzeniami zabezpieczajacymi, skladajacymi sie z czlo¬ nów pradowych, napieciowych, przelaczajacych, wylaczajacych oraz czlonu rozpoznawczego, najczesciej w postaci ukladu pomiarowego okreslonej wielkosci elektrycznej. W przypadku zwarcia sieci elektroenergetycz¬ nej wlaczonej pod napiecie nastepuje w zwartych fazach przeplyw pradu zwarciowego, a wartosc napiecia obniza sie do wartosci napiecia wystepujacego na petli zwarciowej. Napiecia poszczególnych faz jak i prad zwarcia przekazywane do czlonów rozpoznawczych, stanowia impulsy dla czlonów wylaczajacych zwarte elementy sieci.Known systems for protecting power grid elements include voltage transformers and current, the secondary windings of which are connected to the protection devices consisting of the current, voltage, switching, switching off, and reconnaissance element, most often in the form of a measuring system of a specific electrical quantity. In the event of a short circuit in the electricity network short-circuit current flows in short-circuited phases, and the voltage value drops to the value of the short-circuit voltage. Phase voltages and current short-circuits transmitted to the reconnaissance elements constitute impulses for the short-circuited devices network elements.
Istota wynalazku polega na tym, ze zródlo pradu stalego, którego jeden z biegunów jest uziemiony, polaczone jest poprzez szeregowo polaczona cewke przekaznika pradowego i dlawik z punktem gwiazdowym generatora, którego poszczególne fazy polaczone sa z uzwojeniem pierwotnym transformatora. Uzwojenie wtórne transformatora polaczone jest poprzez styki wylacznika mocy z szynami zbiorczymi. W obwodzie sterujacym ukladu napedowego wylacznika mocy znajduja sie styki czynne przekaznika pradowego. Miedzy cewka przekaznika pradowego i dlawikiem a ziemia wlaczone sa równolegle wzgledem siebie kondensator oraz iskiernik.The essence of the invention consists in the fact that the source of direct current, one of the poles of which is earthed, it is connected via a series-connected current relay coil and a star point choke generator whose individual phases are connected to the primary winding of the transformer. Winding the secondary of the transformer is connected via the contacts of the power switch to the busbars. Circuit The active contacts of the current relay are located in the control unit of the power circuit breaker drive system. Between the current relay coil and the choke and the ground are connected in parallel to each other capacitor and spark gap.
Zródlo pradu stalego, cewka przekaznika pradowego i dlawik, zabezpieczany blok elektroenergetyczny zlozony z uzwojenia generatora oraz uzwojenia pierwotnego transformatora stanowia w chwili zwarcia do ziemi zabezpieczanego elementu, petle zwarciowa, natomiast kondensator oraz iskiernik czlon ochronny przed przedostaniem sie wysokiego napiecia do zródla pradu stalego.2 88136 Proponowany uklad dzieki zastosowaniu niezaleznego zródla pradu stalego umozliwia zabezpieczanie elementów sieci elektroenergetycznej wylaczonej jak i wlaczonej pod napiecie.DC power source, current relay coil and choke, protected power block composed of the generator winding and the primary winding of the transformer, it is at the moment of short circuit to earth of the protected element, short-circuit loop, and the capacitor and the spark gap leakage of high voltage to the DC source 2 88 136 Thanks to the use of an independent source of direct current, the proposed system enables protection elements of the power grid switched off and on under voltage.
Przedmiot wynalazku przedstawiony jest w przykladzie wykonania na rysunku, na którym uwidoczniony jest schemat ukladu do zabezpieczania bloku elektoenergetycznego w ukladzie generator-transformator. Jeden z biegunów zródla pradu stalego 1 polaczony jest z ziemia, a drugi biegun poprzez szeregowo polaczona cewke przekaznika pradowego 2 i dlawik 3 z punktem gwiazdowym generatora 4, którego poszczególne fazy polaczone sa z uzwojeniem pierwotnym transformatora 5. Uzwojenie wtórne transformatora 5 polaczone jest poprzez styki 6 wylacznika mocy 7 z szynami zbiorczymi 8 sieci elektroenergetycznej, przy czym w obwodzie sterujacym ukladu napedowego wylacznika mocy 7 znajduja sie styki czynne przekaznika pradowego 2. Miedzy cewka xzekaznika pradowego 2 i dlawikiem 3 a ziemia wlaczone sa równolegle wzgledem siebie kondensator 9 oraz iskiernik 10.The subject of the invention is presented in an exemplary embodiment in the drawing in which it is shown is a diagram of a circuit for protecting a power unit in the generator-transformer system. One from the poles of the DC source 1 is connected to the earth, and the other pole is through a series connected coil of the current relay 2 and the choke 3 with the star point of the generator 4, the individual phases of which are connected sa with the primary winding of the transformer 5. The secondary winding of the transformer 5 is connected via contacts 6 of the power switch 7 with busbars 8 of the power grid, where in the control circuit in the drive system of the power switch 7 there are active contacts of the current relay 2. Between the coil x of the current transformer 2 and the choke 3 and the earth are switched on in parallel to each other capacitor 9 and spark gap 10.
W przypadku doziemienia dowolnej fazy generatora 4 badz uzwojenia pierwotnego transformatora 5 nastepuje wzrost przeplywajacego pradu stalego do wartosci odpowiadajacej rezystancji doziemionych elemen¬ tów sieci, co powoduje wlaczenie styków czynnych przekaznika pradowego 2, które steruja ukladem napedo¬ wym wylacznika mocy 7, wylaczajac transformator 5 od szyn zbiorczych 8.In case of earth fault of any phase of the generator 4 or of the primary winding of the transformer 5 there is an increase in the flowing direct current to a value corresponding to the resistance of the elements to be earthed of the network, which causes the active contacts of the current relay 2, which control the drive system replace the circuit breaker 7 by disconnecting the transformer 5 from the busbars 8.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL17561274A PL88136B1 (en) | 1974-11-14 | 1974-11-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL17561274A PL88136B1 (en) | 1974-11-14 | 1974-11-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL88136B1 true PL88136B1 (en) | 1976-08-31 |
Family
ID=19969648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL17561274A PL88136B1 (en) | 1974-11-14 | 1974-11-14 |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL88136B1 (en) |
-
1974
- 1974-11-14 PL PL17561274A patent/PL88136B1/pl unknown
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