CN206876744U - A kind of gas-insulated standard alternating current-direct current divider - Google Patents

Abstract

The utility model discloses a kind of gas-insulated standard alternating current-direct current divider, including：Standard capacitor divider and standard divider, standard capacitor divider and standard divider use relatively independent structure, and are insulated using SF6 gases；Standard capacitor divider, for carrying out partial pressure to ac high voltage jointly with standard divider, standard capacitor divider includes：High-field electrode, low-field electrode, bucking electrode and low-voltage arm electric capacity, there is enough insulation distances between the high-field electrode and bucking electrode, low-field electrode；The standard divider, for carrying out partial pressure to DC high voltage；For carrying out partial pressure to ac high voltage jointly with standard capacitor divider；The resistance uniform ring of the standard divider is around low-voltage arm electric capacity.The beneficial effects of the utility model are：Standard capacitor divider and standard divider are combined together, positive role is played in the error measure to divider, meanwhile, substantially reduce experimentation cost.

Description

A kind of gas-insulated standard alternating current-direct current divider

Technical field

Divider metering field is the utility model is related to, and more particularly, to a kind of gas-insulated standard alternating current-direct current Divider.

Background technology

Divider is widely used in the measurement of voltage, and it is divided into divider, AC potentiometer and alternating current-direct current divider. Current domestic direct current standard voltage divider uncertainty can reach 1x 10-5, and exchange standard voltage divider uncertainty can reach 2x10-5.Alternating current-direct current divider combines the function of divider and AC potentiometer, but the degree of accuracy can not reach corresponding Class requirement, alternating current-direct current divider generally using resistance capacitance connection in series-parallel form, when divider plus DC high voltage, Due to the blocking characteristic of electric capacity, electric capacity influences to ignore substantially on the partial pressure of resistance, so direct current component can reach one Higher precision；When divider plus ac high voltage, due to resistance also can by exchanging partial pressure, to capacitance partial pressure influence amount compared with Greatly.

With the development of China's electric utility, super-pressure, UHV transmission have turned into the inexorable trend of electric power development, and 2005 Year northwest 750 power network, which is built up, to put into operation, and builds up within 2008 southeast Shanxi -1000 kilovolts of Nanyang-Jingmen extra-high-voltage alternating current experiment and demonstration road, ± 800 kilovolts of Yunnan-Guangdong, Burner zone-Shanghai extra-high voltage direct-current transmission demonstration project are built up within 2010, is turned at present in the world Combined-voltage grade highest country, it is seen that to the demand of standard direct current, AC potentiometer in industry.Power department can be regular Transformer station's alternating current-direct current equipment is detected, can only will exchange standard device if carrying out the detection of alternating current-direct current equipment at present Carried simultaneously with direct current standard device, not only considerably increase equipment conveying amount, also increase person works' amount and work difficulty.

Therefore, it is necessary to which a kind of alternating current-direct current divider, to solve needs, high-acruracy survey ac high-voltage and direct current are high simultaneously The problem of pressure.

The content of the invention

The utility model provides a kind of gas-insulated standard alternating current-direct current divider, solves needs high-acruracy survey simultaneously The problem of ac high-voltage and high direct voltage, greatly reduce workload and work difficulty in measurement.

In order to solve the above problems, the utility model provides a kind of gas-insulated standard alternating current-direct current divider, described point Depressor includes：Standard capacitor divider and standard divider, the standard capacitor divider and standard divider are adopted Insulated with relatively independent structure, and using SF6 gases；

The standard capacitor divider, it is described for carrying out partial pressure to ac high voltage jointly with standard divider Standard capacitor divider includes：High-field electrode, low-field electrode, bucking electrode and low-voltage arm electric capacity, the high-field electrode and shielding There is enough insulation distances between electrode, low-field electrode；

The standard divider, for carrying out partial pressure to DC high voltage；For common with standard capacitor divider Partial pressure is carried out to ac high voltage；Low pressure of the resistance uniform ring of the standard divider around the standard capacitor divider Arm electric capacity.

Preferably, wherein the resistance of the standard straight flow point depressor includes：High-voltage arm resistance and low-voltage arm resistance.

Preferably, wherein the low-voltage arm electric capacity of the resistance of the standard straight flow point depressor and the standard capacitor divider has There are enough insulation distances.

Preferably, wherein the standard alternating current-direct current divider also includes：Output cable and display instrument,

The output cable has screen layer, for eliminating the capacitance error of cable introducing；

The display instrument, for being shown to measurement result.

The beneficial effects of the utility model are：

The utility model provides a kind of gas-insulated standard alternating current-direct current divider, solves needs high-acruracy survey simultaneously The problem of ac high-voltage and high direct voltage.The utility model makes full use of the spy of standard capacitor divider and standard divider Point, is effectively integrated them, and constitutes standard alternating current-direct current divider, and positive work is played in the error measure to divider With, meanwhile, substantially reduce cost and the experimentation cost of separate standards divider and AC potentiometer.

Brief description of the drawings

By reference to the following drawings, illustrative embodiments of the present utility model can be more fully understood by：

Fig. 1 is the schematic diagram of traditional alternating current-direct current divider；And

Fig. 2 is the schematic diagram according to the gas-insulated standard alternating current-direct current divider of the utility model embodiment.

Embodiment

Illustrative embodiments of the present utility model are introduced with reference now to accompanying drawing, however, the utility model can use many Different forms is implemented, and is not limited to embodiment described herein, there is provided these embodiments are in order at large and complete Open the utility model entirely, and fully pass on the scope of the utility model to person of ordinary skill in the field.For Term in the illustrative embodiments being illustrated in the accompanying drawings is not to restriction of the present utility model.In the accompanying drawings, identical Cells/elements use identical reference.

Unless otherwise indicated, term (including scientific and technical terminology) used herein has to person of ordinary skill in the field It is common to understand implication.Further it will be understood that the term limited with usually used dictionary, be appreciated that and its The linguistic context of association area has consistent implication, and is not construed as Utopian or overly formal meaning.

Fig. 1 is the schematic diagram of traditional alternating current-direct current divider.As shown in figure 1, traditional alternating current-direct current voltage divider arrangement is simple, Partial pressure is uniform, and electrical insulation properties requirement is simple, also due to this design feature limits the raising of its measurement accuracy.By electric capacity Blocking characteristic understands that, when equipment plus DC high voltage, divider mainly passes through electric resistance partial pressure, influence amount of the electric capacity for resistance It is smaller, now the accuracy of measurement of direct current can reach 1x10-3 and more than；When equipment plus ac high voltage, resistance and electric capacity It is while partial pressure, the degree of accuracy of now influence AC measurment mainly there are two aspects：The influence of stray capacitance and resistance Influence, this make it that the accuracy of measurement of the AC portion of alternating current-direct current divider is difficult to improve.

The utility model provides a kind of gas-insulated standard alternating current-direct current divider, and the divider includes：Standard capacitance Divider and standard divider, the standard capacitor divider and standard divider use relatively independent structure, And insulated using SF6 gases, it is abundant using standard capacitor divider with standard divider the characteristics of, effectively will It is combined together, and constitutes standard alternating current-direct current divider, and positive role is played in the error measure to divider, meanwhile, significantly Reduce cost and the experimentation cost of separate standards divider and AC potentiometer.

Fig. 2 is the schematic diagram according to the gas-insulated standard alternating current-direct current divider of the utility model embodiment.Such as Fig. 2 institutes Show, the gas-insulated standard alternating current-direct current divider includes：Standard capacitor divider and standard divider two parts.It is described Standard capacitor divider, for carrying out partial pressure, the standard capacitance partial pressure to ac high voltage jointly with standard divider Device includes：High-field electrode 1, low-field electrode 3, bucking electrode 2 and low-voltage arm electric capacity 8 are the high-field electrode 1 and bucking electrode 2, low There is enough insulation distances between piezoelectricity pole 3.

The standard divider, for carrying out partial pressure to DC high voltage；For common with standard capacitor divider Partial pressure is carried out to ac high voltage；Low pressure of the resistance uniform ring of the standard divider around the standard capacitor divider Arm electric capacity.Preferably, wherein the resistance of the standard straight flow point depressor includes：High-voltage arm resistance 4 and low-voltage arm resistance 5.It is preferred that Ground, wherein the low-voltage arm electric capacity of the resistance of the standard straight flow point depressor and the standard capacitor divider has enough insulation Distance.

Preferably, wherein the standard alternating current-direct current divider also includes：Output cable 6 and display instrument 7, the output electricity Cable has screen layer, for eliminating the capacitance error of cable introducing；The display instrument, for being shown to measurement result.

When divider plus DC high voltage, capacitive divider does not work, because of standard capacitor divider and standard straight flow point Depressor is separate, ensures the insulation distance enough with bucking electrode 2, operating on low voltage electrode 3 of high-field electrode 1, capacitance partial pressure Device will not have an impact to divider.

When divider plus ac high voltage, standard divider and standard capacitor divider while partial pressure, standard electric Hold divider and standard divider be overall parallel-connection structure, Measurement channel independently of each other and capacitive divider possess it is good Bucking electrode, the distribution capacity that standard divider substitutes into is effectively isolated.

In embodiment of the present utility model, standard alternating current-direct current voltage divider capacitance divider and resitstance voltage divider composition, Capacitive divider includes：High-field electrode, low-field electrode bucking electrode；Divider includes：High-tension resistive, low resistance.Mark Quasi- alternating current-direct current divider also includes some other supporting constructions and presses supplementary structure.High-field electrode 1 is first with high-voltage arm resistance 4 End connection, as high-pressure side, high-field electrode 1 form high voltage arm capacitor with operating on low voltage electrode 3, and output cable is band shielding knot Structure, screen layer need to be connected with bucking electrode, eliminate the capacitance error that cable introduces.

The utility model is described by reference to a small amount of embodiment.However, it is known in those skilled in the art, Limited as subsidiary Patent right requirement, except the utility model other embodiments disclosed above equally fall In the scope of the utility model.

Normally, all terms used in the claims are all solved according to them in the usual implication of technical field Release, unless clearly being defined in addition wherein.All references " one/described/be somebody's turn to do [device, component etc.] " are all opened ground At least one example being construed in described device, component etc., unless otherwise expressly specified.Any method disclosed herein Step need not all be run with disclosed accurately order, unless explicitly stated otherwise.

Claims (4)

1. a kind of gas-insulated standard alternating current-direct current divider, it is characterised in that the divider includes：Standard capacitor divider and Standard divider, the standard capacitor divider and standard divider use relatively independent structure, and use SF6 Gas is insulated；

The standard capacitor divider, for carrying out partial pressure, the standard to ac high voltage jointly with standard divider Capacitive divider includes：High-field electrode, low-field electrode, bucking electrode and low-voltage arm electric capacity, the high-field electrode and bucking electrode, There is enough insulation distances between low-field electrode；

The standard divider, for carrying out partial pressure to DC high voltage；For with standard capacitor divider jointly to hand over Flow high voltage and carry out partial pressure；Low-voltage arm electricity of the resistance uniform ring of the standard divider around the standard capacitor divider Hold.

2. standard alternating current-direct current divider according to claim 1, it is characterised in that the resistance of the standard divider Including：High-voltage arm resistance and low-voltage arm resistance.

3. standard alternating current-direct current divider according to claim 1, it is characterised in that the resistance of the standard divider There is enough insulation distances with the low-voltage arm electric capacity of the standard capacitor divider.

4. standard alternating current-direct current divider according to claim 1, it is characterised in that the standard alternating current-direct current divider also wraps Include：Output cable and display instrument,

The output cable has screen layer, for eliminating the capacitance error of cable introducing；

The display instrument, for being shown to measurement result.