CN203135452U - High voltage dynamic filter reactive power compensation complete device - Google Patents

Abstract

The utility model provides a high voltage dynamic filter reactive power compensation complete device which comprises a main loop, a reactive power compensation control unit and a remote control unit. The main circuit comprises a magnetron reactor loop and a vacuum contactor-fuse combined electrical loop. The magnetron reactor loop comprises a magnetron reactor, an execution unit which is connected with the magnetron reactor and an excitation control unit. The excitation control unit is connected with the execution unit. The reactive power compensation control unit comprises a switch control unit for controlling the on and off of a switch, a reactive power compensation unit and a data acquisition unit. The reactive power compensation unit comprises a detection unit, a protection unit and a control unit. The reactive power compensation unit is respectively connected with the data acquisition unit and the excitation control unit. According to the high voltage dynamic filter reactive power compensation complete device, system reactive power compensation is solved, the tracking compensation of the reactive power amount of the system can be effectively carried out, the stepless adjustment is achieved, and the voltage is stabilized.

Description

High voltage dynamic filter reactive power compensation complete set

technical field

The utility model relates to the technical field of power distribution system safety maintenance, in particular to a high-voltage dynamic filtering reactive power compensation complete set.           

Background technique

General power system user loads absorb active power PL and reactive power QL, see Figure 1. The power supply provides active power PS and reactive power QS (maybe inductive reactive power or capacitive reactive power), ignoring transformer and line loss, then PS=PL, QS=QL. The power grid without reactive power absorption part has the following problems:

1) The power grid transmits reactive power from the remote end;

2) The reactive power impact of the load affects the power supply quality of the local power grid and the superior power grid.

Utility model content

In view of the above-mentioned deficiencies, the purpose of this utility model is to provide a high-voltage dynamic filtering reactive power compensation complete set, which solves the problem that the power grid transmits reactive power from the remote end and the impact of the reactive power impact of the load on the power grid in the past.

The technical scheme that the utility model solves its technical problem adopts is:

A complete set of high-voltage dynamic filter reactive power compensation, which includes a main circuit, a reactive power compensation control unit and a remote monitoring unit, the main circuit includes a magnetic control reactor circuit and a vacuum contactor-fuse combination electrical circuit, the magnetic The controlled reactor circuit includes a magnetically controlled reactor, an execution unit connected to the magnetically controlled reactor, and an excitation control unit, the excitation control unit is connected to the execution unit, and the reactive power compensation control unit includes a switch for controlling the on-off of the switch A control unit, a reactive power compensation unit, and a data acquisition unit. The reactive power compensation unit includes a detection unit, a protection unit, and a control unit. The reactive power compensation unit is connected to the data acquisition unit and the excitation control unit, respectively.

The reactive power compensation control unit is provided with a communication unit for connecting with a remote monitoring unit.

The remote monitoring unit is also provided with an alarm indication unit for alarm indication, a remote computer and a switch operation panel for remote operation.

The magnetron reactor is composed of a four-column iron core and windings.

The four-column iron core adopts silicon steel sheets.

The winding adopts enameled wire.

The execution unit includes a power conversion unit, an excitation on-off control unit and a photoelectric conversion isolation unit connected in sequence.

The high-voltage dynamic filter reactive power compensation complete set is provided with a filter compensation branch.

The filter compensation branch includes parallel capacitors and dry iron core reactors.

The beneficial effect of the utility model is that at the same time, the reactive power compensation of the system can be solved, the reactive power of the system can be effectively tracked and compensated, and the stepless regulation can be achieved to stabilize the voltage.

Description of drawings

Figure 1 is a simple schematic diagram of load connections.

Fig. 2 is a schematic diagram of the principle of the magnetic control reactor of the present invention.

Fig. 3 is a schematic diagram of the connection structure between the execution unit and the magnetron reactor of the present invention.

Fig. 4 is a schematic diagram of the principle of the filter compensation branch of the present invention.

Fig. 5 is a block diagram of the utility model.

Detailed ways

Embodiments of the utility model are further described below in conjunction with the accompanying drawings:

Referring to Fig. 5, the utility model includes a main circuit 1, a reactive power compensation control unit 2 and a remote monitoring unit 3, the main circuit 1 includes a magnetic control reactor circuit 11 and a vacuum contactor-fuse combination electrical circuit 12, the The magnetic control reactor circuit 11 includes a magnetic control reactor 112, an execution unit 113 connected to the magnetic control reactor 112, and an excitation control unit 111, the excitation control unit 111 is connected to the execution unit 113, and the reactive power compensation control unit 2 It includes a switch control unit 23 for controlling the switch on and off, a reactive power compensation unit 21 and a data acquisition unit 22. The reactive power compensation unit 21 includes a detection unit 211, a protection unit 212 and a control unit 213. The reactive power compensation unit 21 are respectively connected with the data acquisition unit 22 and the excitation control unit 111.

The reactive power compensation control unit 2 is provided with a communication unit 24 for connecting with the remote monitoring unit 3, the communication unit 24 includes an RS485 communication port and an RS232 communication port, and remote monitoring can be realized through the communication unit 24 and the remote monitoring unit 3, The remote monitoring unit 3 is also provided with an alarm indication unit 31 for alarm indication, a remote computer 32 and a switch operation panel 33 for remote operation, which can realize the functions of remote alarm and remote operation switch opening and closing.

Magnetically controlled reactor 112, also known as MCR, is a brand-new reactive power compensation device, which contains electronic components such as thyristors and diodes and corresponding control systems, and belongs to power electronic intelligent products. The origin of the magnetic control reactor 112 comes from the magnetic amplifier and the traditional saturable reactor. However, due to their shortcomings such as slow response speed, large loss, large noise, and large harmonics, they have not been widely used for a long time. The concept of "magnetic valve" The proposal of the saturable reactor greatly improved the performance of the saturable reactor in terms of loss, noise and harmonics, and laid the foundation for a breakthrough in the performance of the saturable reactor. The innovative application of control technology and power electronics in the saturable reactor is even more important. The shortcomings of slow response and difficult control of traditional saturable reactors are fundamentally changed. The utility model adopts the magnetic control reactor 112 as reactive power compensation equipment.

Referring to Fig. 2, the magnetron reactor 112 is composed of a four-column iron core and windings, the magnetron reactor 112 is composed of a four-column iron core and windings, the middle two core columns are working cores, Nk is the control winding, and N is the working winding . Since the thyristor is connected to the control winding, its voltage is very low, about 1% of the rated voltage of the system, thus greatly improving the reliability of operation. When the AC voltage is connected to both ends of the working winding, the corresponding voltage will be induced on the control winding, and the number of turns of Nk is 1% of N, and the voltage on the thyristor T1 and T2 is only 1% of the working voltage , conduction in the positive half cycle T1 of the voltage, conduction in the negative half cycle T2 of the voltage, the DC excitation can be controlled by controlling the conduction angle of T1 and T2. The smaller the conduction angle, the higher the saturation of the iron core, and the smaller the inductive reactance of the magnet reactor 112 . Therefore, as long as the conduction angles of T1 and T2 are controlled, the capacity of the magnetron reactor 112 can be smoothly adjusted. From FIG. 2 , it can also be seen that the magnetron reactor 112 has the function of self-coupling excitation, eliminating the need for a separate DC control source. Another feature of the magnetron reactor 112 is that the small-section iron core is in a limit saturation state. While the other cores are in an unsaturated state, which reduces the active loss (about 0.9% of the rated power), and reduces the harmonic content (about half of TCR, through simple corner joint processing, the harmonic content can be reduced to 5 % or less), the noise is relatively small.

The four-column iron core is made of silicon steel sheet, the winding is made of enameled wire, and adopts a low-temperature rise design, which has extremely high reliability and can be used normally for more than 10 years. It only needs regular simple routine inspections to ensure long-term stability of the equipment The operation and maintenance workload is extremely small, the maintenance difficulty is small, and the maintenance cost is extremely low.

Referring to FIG. 3 , the execution unit 113 includes a power conversion unit 1131 , an excitation on-off control unit 1132 and a photoelectric conversion isolation unit 1133 connected in sequence, and the excitation on-off control unit 1132 is connected to the excitation control unit 111 . The working voltage of the excitation control unit 111 is extremely low, and the excitation control unit 111 itself has a complete protection system, which can fully guarantee the reliability and safety of its operation. The excitation control unit 111 and the main control unit use optical signals for control and status transmission, ensuring that the system has Strong anti-interference ability and high reliability.

Referring to Fig. 4, the high-voltage dynamic filter reactive power compensation complete set is provided with a filter compensation branch 4, and the filter compensation branch 4 includes a shunt capacitor 41 and a dry-type iron-core reactor 42, and the dry-type iron-core reactor 42 and The parallel capacitor 41 is connected, and the two ends of the parallel capacitor 41 are connected in parallel with the discharge coil 44. The connection between the parallel capacitor 41 and the dry-type iron core reactor 42 is connected to the parallel lightning arrester 43 for grounding, and the other end of the dry-type iron core reactor 42 is connected to the self-coupler. On-load voltage regulator 45 and filter compensation branch 4 composed of shunt capacitor 41 and dry core reactor 42 can cooperate with inductive reactive power compensation of magnetron reactor 112 to realize dynamic compensation function for system reactive power.

The embodiment should not be regarded as limiting the utility model, but any improvement based on the spirit of the utility model should be within the protection scope of the utility model. the

Claims (9)

1. A complete set of high-voltage dynamic filter reactive power compensation, which includes a main circuit (1), a reactive power compensation control unit (2) and a remote monitoring unit (3), and the main circuit (1) includes a magnetically controlled reactor circuit (11) and a vacuum contactor-fuse combined electrical circuit (12), characterized in that: the magnetic control reactor circuit (11) includes a magnetic control reactor (112), connected to the magnetic control reactor (112) An execution unit (113) and an excitation control unit (111), the excitation control unit (111) is connected to the execution unit (113), and the reactive power compensation control unit (2) includes a switch control unit for controlling on-off of the switch (23), a reactive power compensation unit (21) and a data acquisition unit (22), the reactive power compensation unit (21) includes a detection unit (211), a protection unit (212) and a control unit (213), the wireless The power compensation unit (21) is respectively connected with the data acquisition unit (22) and the excitation control unit (111). 2. The high-voltage dynamic filter reactive power compensation complete set according to claim 1, characterized in that: the reactive power compensation control unit (2) is provided with a communication unit (24) for connecting with the remote monitoring unit (3). 3. The high-voltage dynamic filtering reactive power compensation complete set according to claim 1, characterized in that: the remote monitoring unit (3) is also provided with an alarm indication unit (31) for alarm indication, a remote computer (32) and Switch operator panel (33) for remote operation. 4. The high-voltage dynamic filtering reactive power compensation complete set according to claim 1, characterized in that: the magnetron reactor (112) is composed of a four-column iron core and windings. 5. The high-voltage dynamic filter reactive power compensation complete set according to claim 4, characterized in that: the four-column core is made of silicon steel sheet. 6. The complete set of reactive power compensation device for high-voltage dynamic filtering according to claim 4, characterized in that: the winding is made of enameled wire. 7. The high-voltage dynamic filter reactive power compensation complete set according to claim 1, characterized in that: the execution unit (113) includes a power conversion unit (1131), an excitation on-off control unit (1132) and a photoelectric Transform isolation unit (1133). 8. The complete set of high-voltage dynamic filter reactive power compensation according to claim 1, characterized in that: the complete set of high-voltage dynamic filter reactive power compensation is provided with a filter compensation branch (4). 9. The high-voltage dynamic filter reactive power compensation complete set according to claim 8, characterized in that: the filter compensation branch (4) includes a shunt capacitor (41) and a dry-type core reactor (42).

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