Summary of the invention
Technical problem to be solved by this invention provides a kind of electric power system stable more and large-capacity double-body pressure-regulating phase-shifting transformator efficiently of the operation of transmission that is incorporated into the power networks that makes.
The technical solution adopted for the present invention to solve the technical problems:
The present invention includes series transformer fuel tank, excitation transformer fuel tank, series transformer, excitation transformer, had the first polarity selector K
ZF1The first resistance-type on load tap changer K1, have the second polarity selector K
ZF2The second resistance-type on load tap changer K2;
The series transformer fuel tank is connected with the excitation transformer fuel tank by pipeline;
Series transformer is every by high-tension coil L
CgWith low-voltage coil L
CdForm the every phase low-voltage coil of series transformer L
CdHead end a meet the end A1 of the corresponding second resistance-type on load tap changer K2, this phase low-voltage coil L
CdTerminal b meet the corresponding first polarity selector K
ZF1Moving contact; Each phase high-tension coil L of series transformer
CgThe end S1, S2, the S3 that connect power supply are arranged, each phase high-tension coil L of series transformer respectively
CgThe end L1, L2, the L3 that connect load are accordingly arranged respectively;
Excitation transformer is every by high-tension coil L
Lg, phase shift coil L
Lt1, voltage regulation coil L
Lt2Form the high-tension coil L of excitation transformer
LgBe Y-connection, the every phase high-tension coil of excitation transformer L
LgThe end with respect to Y-connection meet the high-tension coil L of the corresponding phase of series transformer respectively
CgCentre cap;
The every phase shift phase coil of excitation transformer L
Lt1The first and last end meet the first polarity selector K of this phase respectively
ZF1Positive and negative two ends, the first polarity selector K of this phase
ZF1Moving contact meet the second polarity selector K of adjacent phase
ZF2Moving contact, the phase shift coil L of this phase
Lt1The contact of deciding of tap leading-out end and this first resistance-type on load tap changer mutually connect;
The every phase voltage regulation coil of excitation transformer L
Lt2The first and last end meet the second polarity selector K of this phase respectively
ZF2Positive and negative two ends, the voltage regulation coil L of this phase
Lt2The contact of deciding of tap leading-out end and this second resistance-type on load tap changer mutually connect.
The invention has the beneficial effects as follows owing to be continuously adjustable in certain limit at its mains side of series transformer and the phase angle difference of load-side, simultaneously, synchronizing voltage also is continuously adjustable within the specific limits, it controls electric current by circuit by the variation of in-phase voltage size, regulate the actual current of controlling each parallel branch of electric power system in parallel by the phase angle of phase shift coil, thereby solve because the overcurrent problem that transmission circuit in parallel causes makes that the operation of electric power system is stable more and efficient.
Embodiment
By the embodiment shown in Fig. 1-3 as can be known, it includes series transformer fuel tank, excitation transformer fuel tank, series transformer, excitation transformer, has the first polarity selector K
ZF1The first resistance-type on load tap changer K1, have the second polarity selector K
ZF2The second resistance-type on load tap changer K2;
The series transformer fuel tank is connected with the excitation transformer fuel tank by pipeline;
Series transformer is every by high-tension coil L
CgWith low-voltage coil L
CdForm the every phase low-voltage coil of series transformer L
CdHead end a meet the end A1 of the corresponding second resistance-type on load tap changer K2, this phase low-voltage coil L
CdTerminal b meet the corresponding first polarity selector K
ZF1Moving contact; Each phase high-tension coil L of series transformer
CgThe end S1, S2, the S3 that connect power supply are arranged, each phase high-tension coil L of series transformer respectively
CgThe end L1, L2, the L3 that connect load are accordingly arranged respectively;
Excitation transformer is every by high-tension coil L
Lg, phase shift coil L
Lt1, voltage regulation coil L
Lt2Form the high-tension coil L of excitation transformer
LgBe Y-connection, the every phase high-tension coil of excitation transformer L
LgThe end with respect to Y-connection meet the high-tension coil L of the corresponding phase of series transformer respectively
CgCentre cap;
The every phase shift phase coil of excitation transformer L
Lt1The first and last end meet the first polarity selector K of this phase respectively
ZF1Positive and negative two ends, the first polarity selector K of this phase
ZF1Moving contact meet the second polarity selector K of adjacent phase (phase difference 120 degree)
ZF2Moving contact, the phase shift coil L of this phase
Lt1The contact of deciding of tap leading-out end and this first resistance-type on load tap changer mutually connect;
The every phase voltage regulation coil of excitation transformer L
Lt2The first and last end meet the second polarity selector K of this phase respectively
ZF2Positive and negative two ends, the voltage regulation coil L of this phase
Lt2The contact of deciding of tap leading-out end and this second resistance-type on load tap changer mutually connect.
The operation principle of present embodiment is as follows:
1, phase-shift theory:
Phase shift is by phase shift coil L
Lt1And have the first polarity selector K
ZF1The first resistance-type on load tap changer K1 finish.The first resistance-type on load tap changer K1 is used for adjusting the output voltage (add deduct, the supporting operating mechanism of the utilization and the first resistance-type on load tap changer K1 is regulated automatically) of excitation transformer.This voltage provides excitation for the iron core of series transformer, the every phase high-tension coil of series transformer L
CgFirst head be connected on the incoming line, its end head is connected on the outlet line, and load current flows through this coil, the wiring of series transformer and excitation transformer as shown in Figure 1.Under the situation of this wiring, the low-voltage coil L that connects with triangle on the series transformer
CdOn voltage variety leading or lag behind the corresponding high-tension coil L of excitation transformer
LgOn 90 ° of voltages.This voltage is sent to corresponding high-tension coil L on the series transformer
CgOn, and produce voltage
With
(see figure 3), these two voltages make the mains side voltage of this phase shifting transformer
And load side voltage
Between produce a phase angle variation.
2, voltage-regulation principle:
Pressure regulation is by voltage regulation coil L
Lt2And have the second polarity selector K
ZF2The second resistance-type on load tap changer K2 finish.
By voltage regulation coil L
Lt2The voltage that produces and the voltage of series transformer are at an angle of 90.This voltage is sent to corresponding high-tension coil L on the series transformer
Cg, make the output voltage size of series transformer vary in size, thereby realize the voltage regulation function (see figure 3) with input voltage.