A kind of CVT monitoring device that is used to monitor MOA voltage
Technical field
The present invention relates to a kind of CVT monitoring device that is used to monitor MOA (Zinc-Oxide Arrester) voltage.
Background technology
Traditional Zinc-Oxide Arrester detection system is introduced required voltage signal and current signal in the same equipment; Voltage signal is that the secondary side of the capacitance type potential transformer (CVT) from transformer station takes out; Current signal can take out through current transformer from the ground wire of Zinc-Oxide Arrester (MOA), and perhaps the lightning stroke counter through the Zinc-Oxide Arrester lower end records.Therefore, owing to adopt same equipment, so need be in the secondary side wiring of CVT during measurement voltage signal, this just brings very big trouble and hidden danger.
Summary of the invention
The objective of the invention is to overcome the defective of prior art and a kind of CVT monitoring device that is used to monitor MOA voltage is provided, it is fixedly mounted near the CVT, in order to monitoring with gather the MOA three-phase voltage, has avoided the CVT secondary side wiring in the traditional measurement process.
The technical scheme that realizes above-mentioned purpose is: a kind of CVT monitoring device that is used to monitor MOA voltage; It connects three CVT; Comprise microprocessor (MCU); And the amplifying circuit, wireless communication module and the storer that are connected respectively with this microprocessor, and the holding circuit that connects said amplifying circuit, wherein:
Said holding circuit connects described three CVT;
Said amplifying circuit is passed to described microprocessor after the MOA three-phase voltage of gathering is amplified;
Said microprocessor receives the MOA three-phase voltage and deposits said storer in, and calculates the instantaneous phase of this MOA three-phase voltage, and sends out through said wireless communication module.
The above-mentioned CVT monitoring device that is used to monitor MOA voltage, wherein, said CVT monitoring device also comprises GPS (GPS) module that connects said microprocessor.
The above-mentioned CVT monitoring device that is used to monitor MOA voltage, wherein, said holding circuit is a resistance.
The above-mentioned CVT monitoring device that is used to monitor MOA voltage, wherein, said amplifying circuit is an amplifier.
The invention has the beneficial effects as follows: near the CVT of being fixedly mounted on of the present invention, monitor and collection MOA three-phase voltage, and can calculate the instantaneous phase of MOA three-phase voltage, avoided the CVT secondary side wiring in the traditional measurement process.Simultaneously, the present invention is simple in structure, and is with low cost, has advantages of high practicability.
Description of drawings
Fig. 1 is the structural representation that is used to monitor the CVT monitoring device of MOA voltage of the present invention.
Embodiment
To combine accompanying drawing that the present invention is described further below.
See also Fig. 1; The CVT monitoring device that is used to monitor MOA voltage of the present invention, it is fixedly mounted near the CVT, connects three CVT; Comprise microprocessor 1; And the amplifying circuit 2, wireless communication module 3 and the storer 4 that are connected respectively with this microprocessor 1, and the holding circuit 5 that connects amplifying circuit 2, wherein:
Holding circuit 5 connects three CVT, is used for protecting device interior device and personal security, and with existing techniques in realizing, in the present embodiment, its structure is a resistance;
Amplifying circuit 2 is passed to microprocessor 1 after the MOA three-phase voltage of gathering is amplified, thereby makes measurement in gamut, keep higher degree of accuracy, and with existing techniques in realizing, in the present embodiment, its structure is an amplifier;
Microprocessor 1 receives the MOA three-phase voltage and deposits storer 4 in, and calculates the instantaneous phase of this MOA three-phase voltage, and sends out through wireless communication module 3;
Storer 4 is used for the historical data of store M OA three-phase voltage, plays the effect of power down protection.
In the present embodiment; Said CVT monitoring device also comprises the GPS module 6 that connects microprocessor 1; This GPS module 6 plays the effect of synchro measure time with measuring the built-in GPS module of the circuital device (not shown) of MOA, makes MOA total current and MOA three-phase voltage synchro measure.The circuital device of described then measurement MOA receives the instantaneous phase of above-mentioned MOA three-phase voltage, and combines synchronous MOA total current, just can calculate the current in resistance property of MOA.The present invention is with low cost, and is simple in structure, so can be fixedly mounted on the CVT annex in a large number, avoided the CVT secondary side wiring in the traditional measurement process.In the present embodiment, the model that microprocessor 1 is selected for use is C8051F040; The model of wireless communication module 3 is RFC-30A.
Above embodiment only supplies to explain the present invention's usefulness; But not limitation of the present invention; The technician in relevant technologies field under the situation that does not break away from the spirit and scope of the present invention, can also make various conversion or modification; Therefore all technical schemes that are equal to also should belong to category of the present invention, should be limited each claim.