CN210780123U - A fully centralized monitoring and protection device for electrical equipment of wind power booster station - Google Patents

Abstract

The utility model discloses a centralized monitoring and protection device for electrical equipment in a wind power booster station, comprising a CPU chip, an input module for performing A/D conversion on analog quantities of electrical equipment in a wind power booster station and then sending it to the CPU chip, a It is used for the control and control of receiving the external digital signal and sending the digital signal to the digital input module of the CPU chip, and used to uniformly output the digital information generated by the CPU chip to the corresponding control objects and protection objects in the wind power booster station. A protection switch quantity output module and a power supply module for providing electrical energy, wherein the input end of the CPU chip is connected with the input module and the switch quantity input module, and the output end of the CPU chip is connected with the control and protection switch quantity output module, the device can It realizes the centralized monitoring and protection of the electrical equipment in the wind power booster station.

Description

A fully centralized monitoring and protection device for electrical equipment of wind power booster station

technical field

The utility model belongs to the technical field of wind power generation, and relates to a fully centralized monitoring and protection device for electrical equipment of a wind power booster station.

Background technique

At present, a booster station computer monitoring system is routinely configured in the wind farm booster station for monitoring, monitoring and control of electrical equipment in the booster station. The monitoring scope mainly includes: high-voltage lines, high-voltage busbars, main transformers, medium-voltage lines, Busbars, reactive power compensation systems, station transformers, ground transformers, low-voltage station power lines, important low-voltage motors, DC systems, UPS, etc.

The monitoring system of the booster station is divided into two layers vertically, namely the station control layer and the interval layer. The station control layer equipment is centrally set according to the long-term scale. The measurement and control units on the bay layer are distributed according to the electrical intervals. The high-voltage line measurement and control device, the main transformer measurement and control device, and the public measurement and control device are respectively arranged and assembled into cabinets according to the interval of the power distribution device, and are centrally arranged in the secondary equipment room; The medium-voltage intervals are distributed and arranged on the corresponding switchgear.

The relay protection devices in the wind farm booster station are distributed and configured according to the electrical interval to which the equipment belongs. High-voltage line protection devices, high-voltage busbar protection devices, and main transformer protection devices are separately configured and assembled into cabinets according to the interval of power distribution devices, and are centrally arranged in the secondary equipment room; medium-voltage measurement, control and protection integrated devices are distributed and arranged in corresponding switches according to medium-voltage intervals. on the cabinet.

The main electrical wiring structure of the wind farm booster station is relatively simple. When the current measurement and control device and protection device are distributed according to the electrical interval, there are the following shortcomings:

1. The number of measurement and control devices and protection devices is relatively large and requires supporting network connection equipment. Taking the typical wiring diagram of the wind power booster station shown in Figure 1 as an example, the electrical equipment of the booster station needs to be equipped with about 7 protection devices, about 7 measurement and control devices, about 8 integrated protection, measurement and control devices, and 4 network switches.

2. The number of measurement and control devices and protection devices is relatively large, which may lead to a relatively increase in the communication failure rate of the monitoring system network where the measurement and control devices are located and the protection information network where the protection devices are located.

3. The input analog signal (current, voltage signal) and output switch signal (circuit breaker closing and tripping signal) of each measurement and control device and protection device have overlapping intervals, and the relevant signals need to be collected repeatedly. Part of the signal of each protection device is collected by the measurement and control device through hard wiring. All of the above factors will lead to an increase in the number of control cables.

The overall linkage debugging during the construction period and the maintenance during the operation period are relatively large. Due to the large number of measurement and control devices and protection devices, scattered locations, and many control cable connections between them, the difficulty of the overall linkage debugging in the construction stage is objectively increased, and the workload of routine maintenance and accident investigation in the operation and maintenance stage is increased. Therefore, It is necessary to develop a device and method, which can realize the centralized monitoring and protection of the electrical equipment in the wind power booster station.

Utility model content

The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art, and provide a centralized monitoring and protection device for the electrical equipment of a wind power booster station, which can realize centralized monitoring and protection of the electrical equipment in the wind power booster station.

In order to achieve the above purpose, the comprehensive monitoring and protection device for the electrical equipment of the wind power booster station according to the present invention includes a CPU chip, an input for A/D conversion of the analog quantity of the electrical equipment in the wind power booster station and then sent to the CPU chip. module, a digital input module for receiving external digital signals and sending the digital signals to the CPU chip, and for uniformly outputting the digital information generated by the CPU chip to the corresponding control objects and protection objects in the wind power booster station The control and protection switch quantity output module and the power supply module for supplying electric energy are provided, wherein the input end of the CPU chip is connected with the input module and the switch quantity input module, and the output end of the CPU chip is connected with the control and protection switch quantity output module.

It also includes a clock timing interface connected with the CPU chip.

It also includes an uplink communication module for connecting the external station control layer equipment and the CPU chip, and a downlink communication module for sending the information in the CPU chip to the external device.

The CPU chip includes a monitoring CPU chip and a protection CPU chip.

The external station control layer equipment includes a host and operator station, an engineer station, an AGC/AVC sub-station, a guarantee sub-station and a telecontrol device.

The control objects in the wind power booster station include circuit breakers, isolating switches, grounding switches and on-load voltage regulating switches.

The utility model has the following beneficial effects:

During the specific operation of the fully centralized monitoring and protection device for the electrical equipment of the wind power booster station, the CPU chip collects and transmits the analog quantities of the electrical equipment in the wind power booster station through the input module, and the CPU chip unifies the analog quantity of the electrical equipment in the wind power booster station through the input module. Receive the external switch signal, and then process the data centrally through the CPU chip to control and protect the electrical equipment in the wind power booster station, so as to realize the centralized monitoring and protection of the electrical equipment in the wind power booster station.

Description of drawings

Figure 1 is a typical wiring diagram of a wind power booster station;

Figure 2 is a diagram of a fully centralized monitoring and protection system for a wind power booster station;

FIG. 3 is a structural block diagram of the utility model.

Among them, 1 is the switch input module, 2 is the AC analog input module, 3 is the DC analog input module, 4 is the downlink communication module, 5 is the clock timing interface, 6 is the monitoring CPU chip, 7 is the protection CPU chip, 8 is a printer, 9 is a display interface, 10 is an upstream communication module, and 11 is a control and protection switch quantity output module.

Detailed ways

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

Referring to FIG. 3 , the comprehensive monitoring and protection device for the electrical equipment of the wind power booster station according to the present utility model includes a CPU chip, an input module for performing A/D conversion on the analog quantity of the electrical equipment in the wind power booster station and sending it to the CPU chip. . The digital input module used to receive external digital signals and send the digital signals to the CPU chip 1. It is used to uniformly output the digital information generated by the CPU chip to the corresponding control objects and protection objects in the wind power booster station The control and protection switch quantity output module 11 and the power supply module for providing electrical energy, wherein the input end of the CPU chip is connected with the input module and the switch quantity input module 1, and the output end of the CPU chip is connected with the control and protection switch quantity output module 11. connected, the input module includes an AC analog input module 2 and a DC analog input module 3 .

The utility model also includes a clock time synchronization interface 5 connected with the CPU chip, an uplink communication module 10 for connecting external station control layer equipment and the CPU chip, and a downlink communication module for sending the information in the CPU chip to the external equipment. 4 and a printer 8, a display interface 9 and a keyboard connected to the CPU chip, wherein the external station control layer equipment includes a host and operator station, an engineer station, an AGC/AVC sub-station, a guarantee sub-station and a telecontrol device.

The CPU chip includes a monitoring CPU chip 6 and a protection CPU chip 7 .

The control objects in the wind power booster station include circuit breakers with electric operation, isolating switches, grounding switches and on-load voltage regulator switches; the protection objects include high-voltage lines, high-voltage busbars, main transformers, medium-voltage busbars, SVG, capacitor banks, grounding transformers , station transformers, medium voltage wind power collector lines, low voltage lines and electrical appliances, among which, the protection of low voltage lines and electrical appliances is realized by the circuit breaker body, and the protection of other objects is realized by a fully centralized monitoring and protection device, which acts on alarm signals or Circuit breaker closed/tripped.

The concrete working process of the present utility model is:

The input module obtains the analog information of the electrical equipment in the wind power booster station through the current transformer and the voltage transformer, and sends the analog information of the electrical equipment in the wind power booster station to the CPU chip after A/D conversion;

The switch quantity input module 1 receives the switch quantity signal input from the outside, and sends the switch quantity signal to the CPU chip;

The CPU chip generates a control signal according to the digital signal and the analog information converted by A/D, and sends the control signal to the corresponding control object and protection object in the wind power booster station through the digital input module 1. The corresponding control objects and protection objects in the booster station respond to the control signal, so as to realize the centralized monitoring and protection of the electrical equipment of the wind power booster station.

Example 1

Figure 1 shows the typical wiring of a wind power booster station. The main equipment within the monitoring and protection scope of a typical wind farm booster station is shown in Table 1.

Table 1

The general signal table of the wind power booster station shown in Figure 1 is shown in Table 2.

Table 2

Among them, SVG system (part), DC and UPS signals are collected through communication. The whole station signal is sent to the monitoring system host, remote control device, AGC sub-station and AVC sub-station by means of communication. For each part of the communication data information, please refer to the relevant specifications, and this table does not list them in detail.

The electrical equipment protection of the whole station mainly includes: 220kV line longitudinal differential protection, overcurrent protection; 220kV busbar differential protection; 220kV circuit breaker failure protection; main transformer differential protection, high-voltage side overcurrent protection, high-voltage side zero-sequence current protection Protection, high-voltage side gap zero-sequence current protection, low-voltage side overcurrent protection, non-electrical protection; 35kV busbar differential protection; grounding variable-speed off protection, overcurrent protection, zero-sequence current protection, non-electrical protection; station variable-speed off protection, Overcurrent protection, zero-sequence current protection, non-electrical protection; SVG incoming line quick-break protection, overcurrent protection, zero-sequence current protection, non-electrical protection; capacitor bank quick-break protection, overcurrent protection, differential voltage protection, zero-sequence current protection; Wind power collector line quick-break protection, over-current protection, zero-sequence current protection, non-electricity protection.

The centralized measurement and control protection device is connected with multiple station control layer equipment (host and operator station, engineer station, AGC/AVC sub-station, guarantee sub-station, remote control device) through multiple uplink communication ports, and the internal monitoring and protection information data Packed for multiple distribution.

Claims (6)

1. a fully centralized monitoring and protection device for the electrical equipment of a wind power booster station, is characterized in that, comprises a CPU chip, an input module that is used to carry out A/D conversion to the analog quantity of the electrical equipment in the wind power booster station and send to the CPU chip, A digital input module (1) for receiving an external digital signal and sending the digital signal to the CPU chip, and for uniformly outputting the digital information generated by the CPU chip to the corresponding control object and protection in the wind power booster station Object control and protection switching quantity output module (11) and power supply module for supplying electric energy, wherein the input end of CPU chip is connected with the input module and the switching quantity input module (1), and the output end of CPU chip is connected with control protection switch connected to the output module (11). 2 . The comprehensive monitoring and protection device for electrical equipment of a wind power booster station according to claim 1 , further comprising a clock time synchronization interface ( 5 ) connected to the CPU chip. 3 . 3. The fully centralized monitoring and protection device for electrical equipment of a wind power booster station according to claim 1, characterized in that, further comprising an uplink communication module (10) for connecting an external station control layer equipment and a CPU chip, and an uplink communication module (10) for connecting the CPU The information in the chip is sent to the downlink communication module (4) of the external device. 4 . The comprehensive monitoring and protection device for electrical equipment of a wind power booster station according to claim 1 , wherein the CPU chip comprises a monitoring CPU chip ( 6 ) and a protection CPU chip ( 7 ). 5 . 5 . The fully centralized monitoring and protection device for electrical equipment in a wind power booster station according to claim 3 , wherein the external station control layer equipment comprises a host computer and an operator station, an engineer station, an AGC/AVC sub-station, a guarantor sub-station. 6 . station and telecontrol device. 6 . The fully centralized monitoring and protection device for electrical equipment in a wind power booster station according to claim 1 , wherein the control objects in the wind power booster station include circuit breakers, isolation switches, grounding switches and on-load voltage regulator switches. 7 .

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