CN203056587U - A voltage regulating reactive power compensation filter device - Google Patents

Abstract

A voltage-regulating reactive power compensation filter device, the voltage-regulating branch is connected to the power grid at the busbar (1), and is connected to the on-load fast regulating device via a circuit breaker (2), an isolating switch (3), and a current transformer (5). Voltage regulator (6), on-load fast voltage regulator (6) is connected in parallel with phase-controlled reactor (7) at the secondary end, the line sampling signal is transmitted to the control cabinet for calculation and processing, and then the cable (9) and voltage regulation motor mechanism (10) Connect for fast reactive power adjustment. The filter branch is connected in parallel to the busbar (1), and is mainly composed of an isolating switch (3), a filter reactor (13), and a filter capacitor (14) as shown in the figure to form a filter branch, which filters out harmonics and provides capacitive non-conductive to the grid. Work supplement.

Description

A voltage regulating reactive power compensation filter device

technical field

The utility model relates to a filter device, in particular to a fast voltage regulating reactive power compensation device with a filter function. the

Background technique

Most of the current reactive power compensation devices use "SVC" technology. As we all know, the thyristor itself has high loss and poor stability. For fluctuating loads such as electric arc furnaces and electric welding machines, the current may fluctuate considerably within a few cycles of the power frequency, and there will be considerable harmonic content, and flicker cannot be effectively suppressed. The current voltage regulating reactive power compensation device cannot effectively eliminate the harmonics in the line. A large number of non-linear loads such as modern power electronic equipment are connected to the power grid, which seriously affects the quality of the power grid. Therefore, the quality of the power grid and the load capacity of the power grid cannot be effectively improved in occasions where the reactive power changes rapidly and the amount of harmonics is large. the

Contents of the invention

In order to solve the above-mentioned problems of the existing reactive power compensation device, the utility model provides a voltage regulating reactive power compensation filter device. the

On-load fast voltage regulator with new fast oil-immersed on-load tap-changer, fast response. The inductive reactive power output through the voltage regulation part plus the inductive reactive power of the load is approximately equal to the capacitive reactive power output by the filter branch, so that the reactive power at the line collection point is approximately a constant small value, which can compensate for the shortfall in time Reactive power and improve the quality of the grid and the load capacity of the grid; the line harmonics can be effectively filtered through the passive filter group, so that the harmonics generated by the load can be fed back to the upper-level grid as little as possible. the

The technical scheme of the utility model is: from the busbar, connect the circuit breaker, isolating switch, current transformer, and on-load fast voltage regulator in sequence at the primary end, and connect the voltage regulation electric mechanism to the inside of the on-load fast voltage regulator. Transformers and phase-controlled reactors are connected in parallel to the secondary outlet of the on-load fast regulator to form a voltage regulation reactive power compensation unit; filter reactors and filter capacitor banks are connected in series to form a passive filter unit, which is connected in parallel through a circuit breaker Into the bus for filtering, and provide fundamental capacitive compensation capacity. the

Description of drawings

The accompanying drawing is a schematic circuit diagram of a voltage regulating reactive power compensation filter device of the utility model. the

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described. the

In the figure: 1. Bus bar 2. Circuit breaker 3. Isolating switch 4. Lightning arrester 5. Current transformer 6. On-load fast voltage regulator 7. Phase-controlled reactor 8. Voltage transformer 9. Cable 10. Voltage regulating motor mechanism 11. Control cabinet 12. Oil filter unit 13. Filter reactor 14. Filter capacitor 15. Differential current transformer

The voltage regulation branch of the utility model voltage regulating reactive power compensation filter device is connected to the power grid at the busbar (1), and is connected to the on-load The fast voltage regulator (6), the phase-controlled reactor (7) is connected in parallel at the secondary end of the on-load fast voltage regulator (6), through the current transformer (5), the voltage transformer (8), the on-load fast voltage regulator The feedback signal obtained by the controller (6) is transmitted to the control cabinet for calculation and processing. The control cabinet (11) is connected with the voltage regulating electric mechanism (10) via the cable (9) to perform dynamic and quick gear shifting control to adjust the reactive power of the circuit. The oil filter unit (12) is connected to the on-load fast pressure regulator (6) to filter the sealing oil of the switch part. The filtering branch and the voltage regulating branch are connected in parallel on the busbar (1), and are composed of an isolating switch (3), a lightning arrester (4), a current transformer (5), a filtering reactor (13), a filtering capacitor (14), and a differential The dynamic current transformers (15) are connected as shown in the figure to form various filtering branches to filter out harmonics, and the excess part provides capacitive reactive power supplement to the grid. The signals collected by the current transformer (5) and the differential current transformer (15) are calculated and processed by the control cabinet (11) to realize the protection function. the

Claims (2)

1. voltage-regulation type reactive power compensation filter, comprise pressure regulation reactive power compensation unit and passive filtering unit, it is characterized in that: from the bus place, with circuit breaker, isolating switch, current transformer, have and carry quick voltage regulator and be linked in sequence at end once, voltage transformer and Controlled Reactor are connected in parallel to the secondary leading-out terminal that carries quick voltage regulator, control cubicle has been connected to through the pressure regulation motor drive mechanism and has carried quick voltage regulator inside, forms pressure regulation reactive power compensation unit.

2. according to a kind of voltage-regulation type reactive power compensation filter described in the claim 1, it is characterized in that: be composed in series the passive filtering unit by filter reactor and filtering capacitor group, carry out filtering through the circuit breaker bus that inserts in parallel, and first-harmonic capacitive compensation capacity is provided.

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