CN103887799B - Series compensation system - Google Patents

Abstract

The application relates to the field of electric power design and discloses a series compensation system which comprises two groups of line frameworks and a series compensation device, wherein the two groups of line frameworks are respectively used as an incoming line framework and an outgoing line framework, at least one group of line frameworks in the two groups of line frameworks is a wiring framework of a line iron tower type, the wiring framework of the line iron tower type comprises a supporting main body and suspension devices arranged on the supporting main body, the supporting main body is of the line iron tower type, and incoming and outgoing lines of corresponding phases are suspended on the suspension devices; the series compensation devices are arranged between the corresponding inlet wire framework and the corresponding outlet wire framework and are respectively connected with the inlet wires and the outlet wires of the corresponding phases in a one-to-one correspondence mode. Through the series compensation system of this application, owing to replaced portal frame among the prior art through the wiring framework of circuit iron tower type, and relative portal frame, circuit iron tower type area still less can effectively reduce area, practices thrift land resource.

Description

A Series Compensation System

technical field

The invention relates to the field of power design, in particular to a series compensation system.

Background technique

With the growth of the national economy, the domestic UHV AC power grid has entered the stage of large-scale planning and construction, and a large number of 1000kV substations have been built and put into operation one after another, so there is a greater demand for the transmission capacity and stability of the power grid.

In order to improve the transmission capacity and stability level of the power grid, a series compensation device is disclosed in the prior art. The series compensation device is connected in series in the transmission line and is composed of a capacitor and its protection, control and other equipment. It is a device for compensating the inductance of the line. The series compensation device can be jointly built with the substation or a series compensation station can be set separately , to ensure the transmission capacity and stability level of the power grid. Among them, the series compensation device connected in series in the 1000kV transmission line is usually called the 1000kV series compensation device. At present, the conventional arrangement of the series compensation device generally adopts a portal frame to set up the incoming and outgoing lines, and the incoming and outgoing lines are arranged in parallel, and then the series compensation device is arranged outside the line or under the line.

However, the inventor found out in the research process of the present application that when the arrangement of the series compensation device is implemented in the prior art, it needs to occupy a large area of land, which in turn makes the overall occupied area of the substation larger.

Contents of the invention

In view of this, the purpose of the present invention is to solve the problem that in the prior art, when implementing the arrangement of the series compensation device, the land area to be occupied is relatively large, and thus the overall floor area of the substation is relatively large. The specific implementation plan is as follows:

A series compensation system, the series compensation system includes: two sets of line frames and a series compensation device, the two sets of line frames are respectively used as an incoming line frame and an outgoing line frame,

Wherein, at least one group of the two groups of line frames is a line iron tower type wiring frame, and the line iron tower type wiring frame includes: a supporting body and various suspension devices arranged on the supporting body, wherein the supporting The main body is a line iron tower type, and the incoming and outgoing lines of corresponding phases are suspended on each suspension device;

The series compensation device is arranged between the incoming line frame and the outgoing line frame corresponding to itself, and is respectively connected to the incoming and outgoing lines of the corresponding phase in a one-to-one correspondence.

Preferably, the tower-type wiring structure of the line is a single-tower structure, and each of the two sides of the single-tower structure is connected with an incoming and outgoing line, and the phase sequence of the incoming and outgoing lines on both sides is the same.

preferred,

When one of the two groups of line structures is a line iron tower type wiring structure, the other set of line structures is a Π-type structure.

preferred,

The suspension device is an insulator string.

Preferably, the series compensation device includes:

Series capacitors, surge arresters, spark gaps, bypass breakers, auxiliary breakers, damping elements, auxiliary equipment and insulating platforms.

preferred,

There are one or more insulating platforms.

Preferably, a lightning arrester, an isolating switch and a voltage transformer are arranged beside the series compensation device.

In the series compensation system disclosed in the present application, two sets of line frames and series compensation devices are included, and the two sets of line frames are respectively used as the incoming line frame and the outgoing line frame, wherein at least one of the two sets of line frames is a line iron tower type wiring frame to replace the gate-type frame existing in the prior art, wherein the line iron tower-type wiring frame is composed of a line iron tower-type support body and a suspension device that hangs incoming and outgoing lines of corresponding phases; and, the series compensation The devices are respectively connected to the incoming and outgoing lines of the corresponding phases in one-to-one correspondence, and are arranged between the incoming line frame and the outgoing line frame corresponding to themselves.

Through the series compensation system of the present application, while improving the stability of the power system and increasing the transmission capacity of the line, since the gantry structure in the prior art is replaced by the iron tower type wiring structure of the line, compared with the gantry structure, the so-called The iron tower type of the above-mentioned lines occupies less area, which can effectively reduce the occupied area and save land resources.

In addition, compared with the gate-shaped frame in the prior art, the iron tower-type wiring frame of the line uses less steel, so the series compensation system in the present application effectively saves the steel amount and reduces the engineering investment.

In addition, the incoming and outgoing lines of the corresponding phases are respectively suspended on each suspension device of the iron tower type wiring frame of the line, and at the same time, the series compensation devices are respectively connected with the incoming and outgoing lines of the corresponding phases in a one-to-one correspondence, so that the incoming and outgoing lines of different phases can be avoided The series compensation platforms of each phase installed on the line are staggered, which creates favorable conditions for the normal operation, maintenance and inspection between the incoming and outgoing lines of each phase, and between each incoming and outgoing line and the series compensation compensation device. The inspection and maintenance of the series compensation device or the incoming and outgoing lines will not affect the normal operation of the current circuit or another circuit, which reduces the power failure loss during the maintenance of the series compensation device and saves engineering investment.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of electrical principle wiring of a series compensation system disclosed in an embodiment of the present invention;

Fig. 2 is a schematic plan view of a series compensation system disclosed by an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In order to solve the problem in the prior art that when arranging a series compensation device, the occupied land area is relatively large, resulting in a relatively large occupied area of the substation as a whole, the present application discloses a series compensation system.

Referring to the schematic wiring diagram of the electrical principle of the series compensation system shown in Figure 1, and the schematic plan view of the series compensation system shown in Figure 2, the series compensation system disclosed in the present application includes: two sets of line frames 1 and series compensation devices 2, the The two sets of line frames are respectively used as the incoming line frame and the outgoing line frame.

Wherein, at least one group of the two groups of line frames is a line iron tower type wiring frame, and the line iron tower type wiring frame includes: a supporting body and various suspension devices arranged on the supporting body, wherein the supporting The main body is a line iron tower type, and the incoming and outgoing lines of corresponding phases are suspended on each suspension device;

The series compensation device 2 is arranged between the incoming line frame and the outgoing line frame corresponding to itself, and is respectively connected to the incoming and outgoing lines of the corresponding phase in a one-to-one correspondence.

Wherein, the suspension device used for suspending the incoming and outgoing lines on the iron tower type wiring frame of the line is usually an insulator string, such as a tension insulator string. The insulator string is an assembly composed of two or more insulator elements used for flexible suspension wires.

In addition, in order to avoid interleaving of the incoming and outgoing lines of different phases, the suspension device disclosed in the present application usually corresponds to the phase of the incoming and outgoing lines, so as to realize the phase-separated arrangement of the incoming and outgoing lines of each phase.

Moreover, the series compensation device corresponds to the incoming and outgoing lines of each phase, and is connected to the corresponding incoming and outgoing lines, for example, the A-phase wire is connected to the corresponding A-phase series device. For example, referring to the schematic plan view of the series compensation system shown in Figure 2, the A-phase conductor is connected to the first series device on the right, which is the A-phase series device, and correspondingly, the second series device is B phase series device, and the third series device is a C-phase series device.

In the series compensation system disclosed in the present application, it includes two sets of line frames and series compensation devices, wherein at least one of the two sets of line frames uses a line tower-type connection frame to replace the existing door in the prior art type frame, wherein the line iron tower type wiring frame is composed of a line iron tower type support body and a suspension device suspended with corresponding phases; and, the series compensation device is respectively connected to the incoming and outgoing lines of the corresponding phases in a one-to-one correspondence , arranged between the incoming line frame and the outgoing line frame corresponding to itself.

Through the series compensation system of the present application, while improving the stability of the power system and increasing the transmission capacity of the line, since the gantry structure in the prior art is replaced by the iron tower type wiring structure of the line, compared with the gantry structure, the so-called The iron tower type of the above-mentioned line occupies less area, which can effectively reduce the area occupied and save land resources.

In addition, compared with the gate-shaped frame in the prior art, the iron tower-type wiring frame of the line uses less steel, so the series compensation system in the present application effectively saves the steel amount and reduces the engineering investment.

In addition, the incoming and outgoing lines of the corresponding phases are respectively suspended on each suspension device of the iron tower type wiring frame of the line, and at the same time, the series compensation devices are respectively connected with the incoming and outgoing lines of the corresponding phases in a one-to-one correspondence, so that the incoming and outgoing lines of different phases can be avoided The series compensation platforms of each phase installed on the line are staggered, which creates favorable conditions for the normal operation, maintenance and inspection between the incoming and outgoing lines of each phase, and between each incoming and outgoing line and the series compensation compensation device. The inspection and maintenance of the series compensation device or the incoming and outgoing lines will not affect the normal operation of the current circuit or another circuit, which reduces the power failure loss during the maintenance of the series compensation device and saves engineering investment.

In the series compensation system disclosed in the present application, the incoming and outgoing lines of each phase are arranged horizontally on the iron tower type wiring frame of the line, which is beneficial to reasonably partition the series compensation devices corresponding to the incoming and outgoing lines of different phases. In addition, the present application adopts The connection structure of the line tower type is a tower type similar to the line professional, so that it can cooperate more harmoniously with the line and reduce the total investment of power transmission and transformation projects. Moreover, this wiring method is relatively simple, which can better save investment in hardware and wires. Moreover, with this wiring method, each building can be arranged under the incoming and outgoing lines according to the actual situation of the substation or series compensation station, without requiring additional land occupation, which further saves land resources.

Further, the tower-type wiring structure of the line is a single-tower structure, and the two sides of the single-tower structure are respectively connected with an incoming and outgoing line, and the phase sequence of the incoming and outgoing lines on both sides is the same.

Further, when one of the two sets of line structures is a line tower-type wiring structure, the other set of line structures is a Π-shaped structure.

Wherein, the Π-shaped frame can be used as an incoming line frame or an outgoing line frame, which is not limited in this application. The Π-shaped frame can evenly arrange the incoming and outgoing lines, and the steel consumption and occupied area of the Π-shaped frame are also smaller than the portal-shaped frame used in the prior art, which can save steel consumption and reduce the occupied area.

Further, the series compensation device includes: series capacitors, lightning arresters, discharge gaps, bypass circuit breakers, auxiliary circuit breakers, damping elements, auxiliary equipment and insulation platforms. Through the series compensation device, the inductive reactance in the transmission line can be compensated, and the transmission capacity and stability level of the power grid can be improved.

Wherein, the insulating platform is one or more. According to different application requirements, the number of the insulating platforms can be set, which is not limited in this application.

Further, in the series compensation system disclosed in the present application, a lightning arrester, an isolating switch and a voltage transformer are arranged beside the series compensation device. Referring to the schematic diagrams in Fig. 1 to Fig. 2, each part of the device in the series compensation system is: the first disconnector 3, the first surge arrester 4, the voltage transformer 5, the second disconnector 6 and the second surge arrester 7.

Wherein, the first lightning arrester 4 and the second lightning arrester 7 can be used to protect electrical equipment from the harm of instantaneous voltage, and can cut off freewheeling; the first isolation switch 3 and the second isolation switch 6 are used for It plays an isolation role in the circuit; the voltage transformer 5 is used to transform the high voltage into a standard secondary voltage of 100V or lower in proportion, for protection, metering, and instrumentation, and can connect high voltage and electrical work Personnel isolation.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. A series compensation system, characterized in that, the series compensation system comprises: two groups of line frames and a series compensation device, and the two groups of line frames are respectively used as an incoming line frame and an outgoing line frame, Wherein, at least one group of the two groups of line frames is a line iron tower type wiring frame, and the line iron tower type wiring frame includes: a supporting body and various suspension devices arranged on the supporting body, wherein the supporting The main body is a line iron tower type, and the incoming and outgoing lines of corresponding phases are suspended on each suspension device; The series compensation device is arranged between the incoming line frame and the outgoing line frame corresponding to itself, and is respectively connected to the incoming and outgoing lines of the corresponding phases in a one-to-one correspondence; Wherein, the incoming and outgoing lines of each phase are arranged horizontally on the iron tower type wiring frame of the line. 2. The series compensation system according to claim 1, characterized in that, the iron tower type wiring frame of the line is a single tower structure, and the two sides of the single tower structure are respectively connected with one incoming and outgoing line, and the incoming and outgoing lines on both sides The phase sequence is the same. 3. The series compensation system according to claim 1, characterized in that, When one of the two groups of line structures is a line iron tower type wiring structure, the other set of line structures is a Π-type structure. 4. The series compensation system according to claim 1, characterized in that, The suspension device is an insulator string. 5. The series compensation system according to claim 1, wherein the series compensation device comprises: Series capacitors, surge arresters, spark gaps, bypass breakers, auxiliary breakers, damping elements, auxiliary equipment and insulating platforms. 6. The series compensation system according to claim 5, characterized in that, There are one or more insulating platforms. 7. The series compensation system according to claim 1, characterized in that, a lightning arrester, an isolating switch and a voltage transformer are arranged beside the series compensation device.