CN210609101U

CN210609101U - Remote restarting circuit of photovoltaic power station box transformer substation measurement and control device

Info

Publication number: CN210609101U
Application number: CN201921617571.4U
Authority: CN
Inventors: 李占晁; 周生贵; 汪祖新; 苏守慧; 刘磊; 彭连文; 钱海靑; 郭志诚
Original assignee: Qinghai Water Resources And Hydropower Group Gonghe Photovoltaic Power Generation Co ltd
Current assignee: Qinghai Water Resources And Hydropower Group Gonghe Photovoltaic Power Generation Co ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-05-22
Anticipated expiration: 2029-09-26

Abstract

The utility model discloses a photovoltaic power plant case becomes measurement and control device's long-range circuit that restarts, the external power source is connected to empty QF1 one end of opening, the empty other end of opening QF1 is connected with case becomes the supplementary normally open contact one end of circuit breaker QF, case becomes the supplementary normally open contact other end and the measurement and control device power CK one end of circuit breaker QF and is connected, the measurement and control device power CK other end is connected with contactor KM main coil, contactor KM main coil still is connected with outage delay relay KT's normally closed contact one end, outage delay relay KT's the normally closed contact other end and the empty other end of opening QF1 are connected, contactor KM's supplementary normally open contact is parallelly connected with case becomes circuit breaker auxiliary contact QF, contactor KM's supplementary normally closed contact and outage delay relay KT's series connection. The utility model discloses not only can improve fortune dimension efficiency, and also guaranteed fortune dimension personnel's safety at remote control.

Description

Remote restarting circuit of photovoltaic power station box transformer substation measurement and control device

Technical Field

The utility model relates to a photovoltaic power plant technical field, more specifically say, in particular to photovoltaic power plant case becomes measurement and control device's long-range circuit that restarts.

Background

The photovoltaic industry is a novel energy industry, and materials, energy and information are well known to be three major pillars supporting modern civilization. In the current society, energy is increasingly deficient, and solar energy is a sustainable environment-friendly energy as a novel energy. According to prediction, solar photovoltaic power generation occupies an important seat of world energy consumption in the 21 st century, and not only needs to replace part of conventional energy, but also becomes a main body of world energy supply. It is expected that by 2030, renewable energy will account for more than 30% of the total energy structure, and solar photovoltaic power generation will also account for more than 10% of the world's total power supply; in 2040 years, renewable energy sources account for more than 50% of total energy consumption, and solar photovoltaic power generation accounts for more than 20% of total power; by the end of the 21 st century, renewable energy will account for over 80% of energy structures, and solar power generation will account for over 60%. These figures are sufficient to show the development prospects of the solar photovoltaic industry and its strategic position in the energy field.

At present, an integrated automation system in a photovoltaic power station provides data of a photovoltaic area, almost all boosting transformers of the photovoltaic area are provided with a measurement and control device in a matched mode, but the box transformer substation measurement and control device sometimes breaks down, and general faults can be solved by restarting measurement and control. At present, a lot of manufacturers for producing photovoltaic box transformers are available in the market, but because the box transformer substation measurement and control device is a post-added matched product, a power supply of post-added measurement and control device equipment is directly led out from a box transformer substation low-voltage system, and a control unit is not arranged in the middle of the box transformer substation measurement and control device equipment, so that the power supply needs to be disconnected on site if the box transformer substation measurement and control device needs to be restarted. Therefore, it is necessary to provide a restart circuit, which can be connected to a remote background, and can realize restart through the background.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a photovoltaic power plant case becomes measurement and control device's long-range circuit that restarts to overcome the defect that prior art exists.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a remote restart circuit of a photovoltaic power station box transformer substation measurement and control device comprises an air switch QF1, a box transformer substation breaker QF, a power-off delay relay KT, a contactor KM and a measurement and control device power supply CK; the utility model discloses a contactor KM, including contactor KM main coil, empty opening QF1, measurement and control device power CK, contactor KM main coil, the other end of the auxiliary normally open contact of case transformer breaker QF is connected with external power source, the other end of empty opening QF1 is connected, the other end of empty opening QF1 is connected with the auxiliary normally open contact one end of case transformer breaker QF, the auxiliary normally open contact other end and the measurement and control device power CK one end of case transformer breaker QF are connected, the measurement and control device power CK main coil is connected to the auxiliary normally open contact other end and the empty opening QF1 of case transformer breaker, the auxiliary normally open contact and the case transformer breaker auxiliary contact QF of contactor KM are parallelly connected, the auxiliary normally.

Further, the delay time of the power-off delay relay KT is 10 seconds.

Compared with the prior art, the utility model has the advantages of: the utility model discloses a new circuit that restarts can carry out the long-range restart under the control at the background, utilizes this technique to save fortune dimension personnel and goes the time of site operation, not only can improve fortune dimension efficiency, and also guaranteed fortune dimension personnel's safety at remote control.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is the utility model discloses a photovoltaic power plant case becomes measurement and control device's long-range circuit diagram that restarts the circuit.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.

Referring to fig. 1, the utility model provides a remote restart circuit of photovoltaic power station box transformer substation measurement and control device, including empty switch QF1, box transformer substation circuit breaker QF, outage time delay relay KT, contactor KM and measurement and control device power CK; the utility model discloses a contactor KM, including contactor KM main coil, empty opening QF1, measurement and control device power CK, contactor KM main coil, the other end of the auxiliary normally open contact of case transformer breaker QF is connected with external power source, the other end of empty opening QF1 is connected, the other end of empty opening QF1 is connected with the auxiliary normally open contact one end of case transformer breaker QF, the auxiliary normally open contact other end and the measurement and control device power CK one end of case transformer breaker QF are connected, the measurement and control device power CK main coil is connected to the auxiliary normally open contact other end and the empty opening QF1 of case transformer breaker, the auxiliary normally open contact and the case transformer breaker auxiliary contact QF of contactor KM are parallelly connected, the auxiliary normally.

And the delay time of the power-off delay relay KT is 10 seconds.

The utility model discloses in, case becomes circuit breaker QF is the outgoing line circuit breaker that the case becomes, and its combined floodgate and separating brake control circuit access to in measuring and control device, and measuring and control device can break off or close the case and become the circuit breaker, and the normally open auxiliary contact of usable case becomes the circuit breaker simultaneously breaks off or closes measuring and control device's power.

The reconstruction method of the restart circuit comprises the following steps: firstly, disconnecting a power supply of the measurement and control device from a small air switch at the low-voltage side of the original box, and removing an original power line of the measurement and control device; a power supply is taken from an empty open QF1 of a box transformer substation control power supply small trunk transformer (360/380V) (not shown in the figure), and the power supply is connected to a power terminal of a measurement and control device CK after being connected in series with an auxiliary normally open contact of a box transformer substation breaker QF; a normally closed contact of a power-off delay relay KT is connected with a contactor KM main coil in series and then connected to a measurement and control device power supply CK and a normally open contact QF loop in parallel; the contactor KM main coil is uncharged in normal operation at ordinary times; the QF normally-open auxiliary contact of the box transformer breaker is connected with the auxiliary normally-open contact of the contactor KM in parallel, and when the QF normally-open auxiliary contact of the box transformer breaker is disconnected, the power is supplied to the measurement and control device through the normally-open contact KM of the contactor; the auxiliary normally closed contact and the power-off delay of the contactor KM are connected in series through an electric appliance and then are connected to a power supply CK of the measurement and control device, and the delay relay KM performs delay action to trigger power supply after the auxiliary contact of the box breaker QF is disconnected. When the restart circuit is modified, during work, after a box transformer control power supply is switched on and is switched from a small-trunk mode to an empty mode, QF1 is started, the measurement and control device is electrified and normally operates, when the measurement and control device needs to be powered off and restarted, the measurement and control device is powered off only by cutting off QF on an external monitoring machine, a power-off delay relay KT is timed, a normally closed contact of the power-off delay relay KT is closed after 10 seconds, a contactor KM is closed, the box transformer measurement and control device improves a common power supply through an auxiliary normally open contact KM of the contactor, and the measurement and control device; and when the measurement and control device restarts normal operation, the box transformer substation breaker QF can be remotely closed, the auxiliary contact of the box transformer substation breaker QF is closed, the contactor KM loses power after the time relay is electrified, and the power supply loop of the box transformer substation measurement and control device returns to a normal state.

The utility model discloses a restart circuit can with outside synthesize from monitored control system, the backstage control system cooperation realizes full-automatic function, the case becomes measurement and control device is used for collecing, the transmission, the data of the various equipment in photovoltaic power plant power generation district and upload to synthesize from monitored control system, the order that monitored control system sent can also be carried out, can also utilize under the accuse room monitored control system to make this function for measurement and control device disconnection case circuit breaker realize the journey control, backstage monitored control system synthesizes a part of system for photovoltaic power plant, can monitor each item data in photovoltaic power plant power generation district, also can realize the remote control function to case becomes circuit breaker. When the monitoring device is used, when the monitoring device has problems in operation (after partial communication in a photovoltaic area is interrupted), the monitoring device is prepared to be restarted, a box transformer substation breaker QF is disconnected by an up-down order of a monitoring machine in a central control room, an auxiliary contact QF is also disconnected when the breaker QF is disconnected, and the monitoring device loses power at the moment. The time relay KT is also powered off to start timing after the contact QF is disconnected, the normally closed contact KT of the time relay is switched on from the original disconnection after the timing is 10 seconds, at the moment, the coil KM of the contactor is electrified to be sucked, and meanwhile, the normally open contact of the contactor KM is switched on to supply power to the measurement and control device to realize the restarting function.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes and modifications can be made by the owner within the scope of the appended claims, and the protection scope of the present invention should not be exceeded by the claims.

Claims

1. The utility model provides a photovoltaic power plant case becomes measurement and control device's long-range circuit that restarts which characterized in that: the system comprises an air switch QF1, a box transformer breaker QF, a power-off delay relay KT, a contactor KM and a measurement and control device power supply CK; the utility model discloses a contactor KM, including contactor KM main coil, empty opening QF1, measurement and control device power CK, contactor KM main coil, the other end of the auxiliary normally open contact of case transformer breaker QF is connected with external power source, the other end of empty opening QF1 is connected, the other end of empty opening QF1 is connected with the auxiliary normally open contact one end of case transformer breaker QF, the auxiliary normally open contact other end and the measurement and control device power CK one end of case transformer breaker QF are connected, the measurement and control device power CK main coil is connected to the auxiliary normally open contact other end and the empty opening QF1 of case transformer breaker, the auxiliary normally open contact and the case transformer breaker auxiliary contact QF of contactor KM are parallelly connected, the auxiliary normally.

2. The remote restart circuit of the photovoltaic power station box transformer substation measurement and control device according to claim 1 is characterized in that: and the delay time of the power-off delay relay KT is 10 seconds.