The charged recognition device of a kind of DC power transmission line polarity
Technical field
What the present invention relates to is the charged recognition device of a kind of DC power transmission line polarity, belongs to the electrical engineering field.
Background technology
High voltage dc transmission technology send aspect such as electricity to have special advantages at remote large capacity transmission, the asynchronous networking of electric system and subsea cable; Replenish as the strong of ac transmission; D.C. high voltage transmission has worldwide obtained widely using, and in the enforcement of the energy of China 21 century " transferring electricity from the west to the east, north and south supply mutually, national network " and power industry construction basic strategy, has wide development and application prospect especially.Therefore, monitoring is the situation of change of bipolar transmission line of electricity side pole property, voltage and current completely, for the ruuning situation of understanding transmission line of electricity significance is arranged.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists; And a kind of situation of change that can monitor bipolar transmission line of electricity side pole property in all fronts and voltage is provided, the charged recognition device of DC power transmission line polarity of significance is arranged for the ruuning situation of understanding transmission line of electricity.
In order to solve the problems of the technologies described above; The present invention is through the measurement of electric field detector to synthetic field direction around the DC power transmission line; The electric field intensity that obtains according to electric field strength value and simulation calculation and the relation of wire voltage, monitoring be the situation of change of bipolar transmission line of electricity side pole property and voltage completely; Specifically: the present invention mainly is made up of electric field information collection in worksite module, GSM/GPRS communication module and backstage service routine module; Said electric field information collection in worksite module mainly constitutes based on conductor electric-field sensor of induced charge in electric field by one; The electric field level of this electric-field sensor collection position and direction; And pass to the MCU microprocessor; This MCU microprocessor is sent to continuous GSM/GPRS communication module with data, and said GSM/GPRS communication module sends back central platform through gateway with data through the GMS/GPRS network; The said central platform of beating receives the data of gathering, and whether magnitude of voltage and the reversal of poles that draws on the transmission line of electricity that performs mathematical calculations waits information, and constitutes described backstage service routine module.
Described electric-field sensor is based on the principle of conductor induced charge in electric field, and promptly the guarded electrode of electric-field sensor and positive and negative induction electrode are the polycrystalline silicon material of conduction, when guarded electrode vibrates to the right; Positive induction electrode can partly be exposed among the external electric field, and the induced charge on the positive induction electrode can increase, and guarded electrode can block the part area of negative induction electrode simultaneously; Induced charge on the negative induction electrode can reduce, and when the guarded electrode periodic vibration, it is identical to produce size on the positive and negative induction electrode; Induction current in the opposite direction; Utilize differential detection circuit, just can detect faradic size, thereby realize the detection of external electric field.
Described electric field information collection in worksite module links to each other with chargeable lithium battery with solar panel through battery management unit.
Said electric-field sensor be installed in lead to the tower leg line perpendicular to the about 1m in tower leg place below place.
The present invention tests discovery, and this electric-field sensor can be realized the measurement of electrostatic field size and direction, power frequency electric field and atmospheric electric field.
Electric field information collection in worksite module of the present invention was whenever gathered once on-the-spot electric field information at a distance from 1 hour; And sending Information Monitoring to the backstage service routine through the GPRS channel, whether backstage service routine module mainly waits the electric field information that receives magnitude of voltage and the reversal of poles that draws on the transmission line of electricity that performs mathematical calculations for information.
Through the two dimensional electric field sensor of equipped with non-contact on electric power line pole tower, can measure the size and Orientation of the electric field on direction of this point; Shaft tower to electric-field sensor is installed carries out modeling and simulating; Use the electric field intensity of that direction of finite element analysis method calculating sensor place; The linear relationship of voltage by this linear relationship, can draw the magnitude of voltage on the transmission line of electricity on electric field intensity of changing the time on the acquisition shaft tower and the lead.
It has simple in structure, and is easy to use, reliable, can monitor the situation of change of bipolar transmission line of electricity side pole property in all fronts and voltage, for the ruuning situation of understanding transmission line of electricity characteristics such as significance is arranged.
Description of drawings
Fig. 1 is an overall system pie graph of the present invention.
Fig. 2 is a parallel vibration type electric-field sensor fundamental diagram of the present invention.
Fig. 3 is an interlacing vibration type electric-field sensor fundamental diagram of the present invention.
Fig. 4 is the installation site figure of electric-field sensor of the present invention.
Embodiment
To combine accompanying drawing that the present invention is done detailed introduction below: the present invention mainly is made up of electric field information collection in worksite module 7, GSM/GPRS communication module 6 and backstage service routine module; Said electric field information collection in worksite module 7 mainly is made up of an electric-field sensor 1 based on conductor induced charge in electric field; The electric field level and the direction of this electric-field sensor 1 collection position; And pass to MCU microprocessor 2; This MCU microprocessor 2 is sent to continuous GSM/GPRS communication module 6 with data, and said GSM/GPRS communication module 6 sends back central platform 10 through gateway 9 with data through GMS/GPRS network 8; The said central platform of beating 10 receives the data of gathering, and whether magnitude of voltage and the reversal of poles that draws on the transmission line of electricity that performs mathematical calculations waits information, and constitutes described backstage service routine module.
Electric-field sensor of the present invention is based on the principle of conductor induced charge in electric field, and promptly the guarded electrode of electric-field sensor and positive and negative induction electrode are the polycrystalline silicon material of conduction, when guarded electrode vibrates to the right; Positive induction electrode can partly be exposed among the external electric field; Induced charge on the positive induction electrode can increase, and guarded electrode can block the part area of negative induction electrode simultaneously, and the induced charge on the negative induction electrode can reduce; When the guarded electrode periodic vibration; Will produce identical, the in the opposite direction induction current of size on the positive and negative induction electrode, utilize differential detection circuit; Just can detect faradic size, thereby realize the detection of external electric field.
Described electric field information collection in worksite module 7 adopts solar panel 5 and chargeable lithium battery 4 power supplies through battery management unit 3.
Said electric-field sensor 1 be installed in lead to the tower leg line perpendicular to the about 1m in the A of tower leg place below place, see shown in Figure 3.
Present embodiment is used for the charged identification of DC power transmission line polarity and may further comprise the steps: the electric field level and the direction of electric-field sensor 1 each hour collection position; And pass to MCU microprocessor 2; MCU microprocessor 2 is sent to GSM/GPRS communication module 6 with data, and GSM/GPRS communication module 6 sends back central platform 10 through gateway 9 with data through GMS/GPRS network 8.Central platform 10 receives the data of gathering, and whether magnitude of voltage and the reversal of poles that draws on the transmission line of electricity that performs mathematical calculations waits information.Positive-negative polarity judgment means 7 adopts solar panel 5 and chargeable lithium battery 4 power supplies through battery management unit 3.Through verification experimental verification can this device can measuring DC voltage.