CN2316760Y - Operating supply unit for transformer substation - Google Patents

Abstract

The utility model relates to an operating supply unit for a transformer substation, which comprises an AC power supply and a silicon rectifying circuit and an accumulator. The utility model is characterized in that the utility model also comprises a UPS power supply and a switching circuit, the UPS power supply is connected between the AC power supply and the accumulator, and the switching circuit is connected between the accumulator and a switching on generating line; a protecting circuit can be connected between the UPS power supply and the accumulator, a voltage modulator can be connected between the switching circuit and a control generating line, and a capacitor bank can be arranged between the control generating line and a grounding generating line. The utility model has the advantages of high reliability, high quality and convenient maintenance, and the utility model raises the power supply capacity and saves the UPS power supply which is specifically arranged for a microcomputer.

Description

A kind of transformer station operating power device

The utility model relates to the secondary circuit operating power device that a kind of transformer station uses, and belongs to the power technology field.

Transformer station is very high to the reliability requirement of secondary circuit operating power, and needs enough capacity.At present the secondary circuit operating power is adopted various ways, as storage battery direct current operative power source, rectification manipulation power, alternating current operation power supply etc., but there are many drawbacks in these operating powers, as invest greatly, and reliability does not reach requirement, and operation maintenance is comparatively complicated.Concerning the storage battery direct current operative power source, need battery system be set separately and increase the maintaining work of storage battery; Rectification manipulation power then adopts the silicon rectifier mode, the operation of relevant devices when utilizing the discharge process of storage capacitor to maintain instantaneous power failure or fault, but because aspects such as its performance of storage capacitor, reliability and stored energy capacitance restriction, make and only can effectively work at short notice when this supply unit cuts off the power supply, cut if capacitor system breaks down, whole system can't normally be moved.Also there is a common drawback in above-mentioned various operating power device, has not both had the AC voltage-stabilizing system, when making the AC power fluctuation, and relevant controlling equipment cisco unity malfunction.

The purpose of this utility model is to provide a kind of AC voltage-stabilizing function that both had, and can prolong the substation secondary circuit operation supply unit of relevant devices uptime again when instantaneous power failure or burst accident generation.

The purpose of this utility model is achieved through the following technical solutions: a kind of transformer station operating power device, include AC power, silicon rectification circuit, storage battery, its special character is that this device also includes UPS uninterrupted power supply and commutation circuit, AC power is made up of the isolating transformer of isolating transformer that connects three phase mains and order phase power supply, the silicon rectification circuit input joins with the isolating transformer output that connects three phase mains, and the silicon rectification circuit output engages lock bus and earth bus; UPS uninterrupted power supply input and order the isolating transformer output of power supply mutually link to each other, the ac output end of UPS uninterrupted power supply is used to connect order circuit, lighting loop and the computer equipment that AC voltage-stabilizing voltage need be provided, and the dc output end of UPS uninterrupted power supply links to each other with storage battery; Accumulator output end links to each other with earth bus with closing bus bar by the commutation circuit of power station Based Intelligent Control dish control, and when instantaneous power-down or burst accident takes place and control busbar voltage when being lower than 210V, storage battery is to controlling bussed supply.

Because transformer station of the present utility model has inserted the UPS uninterrupted power supply with the operating power device, and ups power has AC voltage-stabilizing, DC charging and power inverter function, thereby by UPS to charge in batteries, can save a cover independent storage battery DC voltage-stabilizing charging device; When instantaneous power-off or burst accident generation, utilize the reversion reaction of ups power, the power supply that maintains the relevant devices proper motion can be provided, by employing ups power amount of capacity difference, it is also inequality that inverter maintains the time, what the large-capacity ups power supply had reaches tens hours, and relevant devices is to the demand of power supply in the time of can satisfying the generation of general power failure and accident; Based on the normal AC voltage-stabilizing effect of ups power, under the normal operation, can satisfy the requirement of relevant devices when operation to the high-quality AC power.

Also be connected to voltage modulator between commutation circuit output and the control bus, voltage modulator is made of with the diode group that is connected in series control panel, the diode group is connected in series successively, diode group positive pole connects commutation circuit output and closing bus bar, negative pole connects the control bus, and each output line of control panel inserts between the diode respectively and diode group two ends.

Because battery tension is usually at 243V, two its operating voltages of control bus are generally at 225V, and generally speaking, storage battery is in charging and discharging state constantly, and this directly has influence on the life of storage battery; For more effectively utilizing storage battery, between storage battery and closing bus bar, be connected with commutation circuit.Commutation circuit is made up of controllable silicon, the control utmost point of controllable silicon SCR and power station Based Intelligent Control dish join, after the Based Intelligent Control dish judges that its operating voltage of control bus is lower than setting voltage, export a control signal, trigger controllable silicon and enter conducting state, storage battery begins to provide operating voltage for the control bus, when the control busbar voltage is higher than 210V, the Based Intelligent Control dish is not exported control signal, not conducting of controllable silicon, and commutation circuit also can take other switch element to form.

When this device combined floodgate immediate current can reach amperes up to a hundred, if accumulator property does not reach requirement, the big or loose contact as interior resistive; equally the UPS uninterrupted power supply had the reverse impact effect; therefore, be protection ups power operate as normal, between ups power and storage battery, be connected in series a protective circuit.This protective circuit is serially connected between ups power dc output end positive pole and the battery positive voltage, is made of resistance that is connected in parallel and backward diode, and diode cathode connects battery positive voltage, and diode cathode connects ups power dc output end positive terminal; Protective circuit also can be made of triode and resistance, inductance coil circuit; transistor base links to each other by inductance coil and ups power dc output end are anodal as input; transistor collector also links to each other with the dc output end of ups power is anodal by resistance, and transistor emitter links to each other with battery positive voltage as output.

In order to guarantee that in case ups power breaks down, and when simultaneously instantaneous power-off or burst accident take place, relevant device still can normally move, so set up a group capacitor group, capacitor group two terminations control bus and earth bus utilize capacitance discharges to be used for keeping the operation of relevant devices, can avoid ups power like this in case damage, whole system can't operate as normal, and this practice has improved the safety factor of whole system operation.

The utility model transformer station has advantages such as reliability height, system running quality improves, investment economizes, maintaining is convenient with the operating power device, has improved the operating power capacity simultaneously.Use this device can solve present transformer station preferably with the existing various drawbacks of operating power device, and save to the station and set up ups power with microcomputer.

Accompanying drawing and drawing explanation:

Fig. 1; The utility model electricity functional-block diagram;

Fig. 2: the utility model most preferred embodiment 1 electrical schematic diagram;

Fig. 3: the utility model most preferred embodiment 2 electrical schematic diagrams.

Most preferred embodiment 1, with reference to figure 2, the transformer station of present embodiment operating power device, include AC power 1, silicon rectification circuit 7, UPS uninterrupted power supply 2, protective circuit 3, storage battery 4, commutation circuit 5, voltage modulator 6, capacitor group 14, AC power 1 is made up of the isolating transformer B2 of isolating transformer B1 that connects three phase mains and order phase power supply, silicon rectification circuit 7 inputs are pressed mutually with line transformer B1 output, silicon rectification circuit 7 outputs engage lock bus+HM and earth bus-HM, silicon rectification circuit 7 is made up of diode D1-D6, per two diodes are one group and are connected in series, the positive terminal of series connection all connects-HM, negative pole end all connects+HM, and the series connection mid point connects 3 end points of B1 secondary coil respectively; Ups power 2 adopts 6KVA, its ac input end and B2 secondary coil join, ac output end joins with order circuit 8, lighting loop 9, microcomputer and other circuit 10 of peripheral hardware respectively, stable AC power is provided, the dc output end positive pole connects the positive terminal of storage battery 4 by protective circuit 3, and negative pole directly links to each other with battery terminal negative end and earth bus-HM; Protective circuit 3 is made up of diode connected in parallel D13 and resistance R 1, and the D13 positive pole connects battery positive voltage, and negative pole connects UPS dc output end positive pole, and storage battery 4 is made of 20 12V storage battery series connection; Tap is drawn in 220V position in storage battery 4, and this tap is connected to closing bus bar+HM by commutation circuit 5, the controllable silicon SCR that commutation circuit 5 adopts the control utmost point to link to each other with the Based Intelligent Control dish; Between closing bus bar+HM and earth bus-HM, also be connected to the voltage modulator of forming by control panel KZ and silicon stack D7-D12 6, D7-D12 Shen successively connects, its positive pole meets SCR negative electrode and closing bus bar+HM, negative pole meets control bus+KM, each output line of KZ insert respectively between two diodes and+KM and SCR negative electrode; The two ends of capacitor group 14 connect respectively-HM and+KM, close a floodgate 11, central signal 12, control protection 13 be external control signal, connect respectively+HM and-HM ,+SM ,-HM ,+KM ,+SM ,-HM ,+KM ,+SM is the flash of light bus.

Most preferred embodiment 2; with reference to figure 3; the difference of present embodiment and embodiment 1 is that described protective circuit 3 is made of triode VT1 and resistance R 1, inductance l1; the VT1 base stage links to each other with the ups power dc output end is anodal by inductance coil l1 as input; the VT1 collector electrode also links to each other with the ups power dc output end is anodal by R1, and the VT1 emitter links to each other with battery positive voltage as output.

During work, to closing bus bar+HM, closing bus bar+HM end DC power supply is after regulate, by control bus output DC source by voltage modulator 6 through silicon rectification circuit 7 rectification output DC sources for AC power 1.

After the Based Intelligent Control dish judges that control bus operating voltage is lower than setting voltage, export a control signal, connect storage battery by commutation circuit and provide operating voltage for the control bus.

Claims (6)

1, a kind of transformer station operating power device, include AC power (1), silicon rectification circuit (7), storage battery (4), it is characterized in that this device also includes UPS uninterrupted power supply (2) and commutation circuit (5), AC power (1) is made up of the isolating transformer (B2) of isolating transformer that connects three phase mains (B1) and order phase power supply, silicon rectification circuit (7) input and the line transformer that connects three phase mains (output of (B1) joins, silicon rectification circuit (7) output engage the lock bus (+HM) and earth bus (HM); UPS uninterrupted power supply (2) input and the order output of the isolating transformer of power supply (B2) mutually link to each other, the ac output end of UPS uninterrupted power supply (2) is used to connect order circuit (8), lighting loop (9) and the computer equipment (10) that AC voltage-stabilizing voltage need be provided, and the dc output end of UPS uninterrupted power supply (2) links to each other with storage battery (4); The commutation circuit (5) of storage battery (4) output by power station Based Intelligent Control dish control be connected to closing bus bar (+HM) and earth bus (HM).

2,, it is characterized in that this device is connected in series a protective circuit (3) between ups power (2) dc output end and storage battery (4) according to the described a kind of transformer station of claim 1 operating power device.

3, according to the described a kind of transformer station of claim 2 operating power device; it is characterized in that described protective circuit (3) is serially connected between ups power dc output end positive pole and the battery positive voltage; constitute by parallel resistor and backward diode; diode cathode connects battery positive voltage, and diode cathode connects ups power dc output end positive pole.

4, according to the described a kind of transformer station of claim 2 operating power device; it is characterized in that described protective circuit (3) is serially connected between ups power dc output end positive pole and the battery positive voltage; constitute by triode and resistance, inductance coil circuit; transistor base links to each other by inductance coil and ups power dc output end are anodal as input; transistor collector also links to each other with the dc output end of ups power is anodal by resistance, and transistor emitter links to each other with battery positive voltage as output.

5, according to the described a kind of transformer station of arbitrary claim in the claim 1 to 4 operating power device, it is characterized in that between commutation circuit (5) and closing bus bar, being connected with voltage modulator (6), commutation circuit is made up of controllable silicon, the silicon controlled control utmost point links to each other with power station Based Intelligent Control dish, voltage modulator (6) is made of with the diode group that is connected in series control panel, the diode group is connected in series successively, its positive pole connect commutation circuit output and closing bus bar (+HM), negative pole connect the control bus (+HM), each output line of control panel inserts respectively between the diode and diode group two ends.

6, according to the described a kind of transformer station of arbitrary claim in the claim 1 to 4 operating power device, it is characterized in that this device also is provided with capacitor group (14), capacitor group two terminations control bus (+KM) and earth bus (HM).

Images