JPH04127871U - Solar thermal power generation equipment control device - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of this invention is to reduce fluctuations in power output due to delays in starting up the auxiliary boiler when the sun is blocked by clouds and the amount of solar radiation decreases in solar thermal power generation equipment. shall be. [Structure] A monitoring device 13 for clouds around the sun using ITV etc. is installed to detect the position, amount, density, movement speed, etc. of clouds around the sun, and based on this, it is predicted that the sun will be blocked by clouds. The feature is that when clouds obstruct the boiler, the control valve 21 is controlled to control reheating of the auxiliary boiler 2 according to the density of the clouds.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a control device for solar thermal power generation equipment.

0002

[Conventional technology]

When the amount of solar radiation decreases (clouds cover the sun) and the main line steam pressure begins to decrease Since the auxiliary boiler starts operating from this point, the steam pressure and steam flow rate of the auxiliary boiler are The major drawback is that the power generated drops significantly until the power increases. This is also one of the factors inhibiting the spread of solar power generation. FIG. 5 shows an example of a conventional solar power generation facility.

0003 If the sunlight is blocked, the amount of heat obtained by the heat collector 12 will decrease, so the solar heat boiler The amount of steam generated in the boiler 1 decreases, the steam pressure in the main line 31 decreases, and the steam The power generated by the generator 5 driven by the bean 4 decreases. This reduction in generated power An auxiliary boiler 2 is installed to reduce the steam pressure in the main line 31 to a certain level. When the pressure decreases to the minimum specified pressure, the pressure is transmitted via the pressure transmitter 32 to maintain the minimum specified pressure. outputs an oil combustion amount signal from the pressure control valve 33 to the control valve 21 and controls the auxiliary boiler 2. oil combustion is started by the burner 22.

0004 Heat collection amount, main line steam pressure, generated power, and auxiliary boiler steam in the conventional equipment shown in Figure 5 The relationship between the flow rate is as shown in Figure 6, and the fluctuation of the generated power when clouds block the sun It can be seen that (the drop) is large.

[0005] In addition, when the sun emerges from the clouds, the main line steam pressure and the generated power are small. Atmospheric release valve 34 that releases steam to the atmosphere when the main line pressure rises above a certain limit This is because steam is released from the

[0006]

[Problem that the idea aims to solve] It is an object to significantly alleviate the drawbacks mentioned in the prior art section. That is, The thickness of the clouds increases before they block the sun, reducing solar radiation and main line steam pressure. In anticipation of the sun's arrival, we start up the auxiliary boiler in advance, and when the sun hides behind the clouds, However, it is essential to ensure uniform continuity of generated power as much as possible in solar thermal power generation. This is a challenge.

[0007]

[Means to solve the problem]

The present invention achieves the above-mentioned effect by installing a solar peripheral cloud monitoring device in solar thermal power generation equipment. This is a solution to such problems. In other words, this device can detect clouds around the sun. location, amount, density of clouds, speed of movement, whether to block the sun, and if it blocks the sun. After what time should the sun be blocked and at what point should the auxiliary boiler be started up? etc. are calculated using image processing, arithmetic processing, etc.

[0008]

[Effect]

By the above means, if clouds are expected to block the sun, at what point? A command signal is sent in advance to start up the auxiliary boiler based on the amount of oil burned. This information is sent to the combustion control device of the auxiliary boiler, and the auxiliary boiler is started before the sun disappears behind the clouds. The system is turned over so that steam can be generated from the auxiliary boiler, and the sun is hidden behind clouds. Minimize fluctuations and decreases in power generation output when power generation occurs, and minimize the impact on power loads. .

[0009]

【Example】

FIG. 1 shows an embodiment of the present invention.

0010 In this invention, in order to avoid the drawbacks of the conventional solar power generation equipment mentioned above, we provide cloud monitoring around the sun. A device 13 is provided, and the signal from this device is passed through an adder 35 to adjust the oil line. The control valve 21 can be actuated by transmitting the signal to the valve 21. In other words, the clouds around the sun are thicker. Whether or not the sun will be blocked, when it will be blocked, and the need for an auxiliary boiler depending on the density of the clouds. The fuel flow rate for reheating, the start of reheating, etc. are determined by the solar surrounding cloud monitoring device 13, and the A signal generated from the solar surrounding cloud monitoring device 13 when it is determined that the sun is blocked by clouds. Therefore, the operation of auxiliary boiler 2 can be started before the sun is blocked by clouds. It is possible to significantly reduce fluctuations in power generation when the area is blocked by clouds. Figure 2 shows an example of clouds around the sun captured by a solar power generation equipment control device. FIG. 3 shows an example of signal processing within the solar cloud monitoring device 13.

[0011] That is, the clouds around the sun are imaged as shown in Figure 2 using an ITV131, etc., and converted into electrical signals. converted. This electrical signal is sent to the image processing device 132 for image processing, figure recognition, etc. It detects the shape, density, direction of movement, speed of movement, etc. of clouds, and determines whether the clouds are facing the sun. If the cloud blocks the sun, determine how long from now. Calculate whether it is blocked. In addition, if it is predicted that the auxiliary button will block the The auxiliary boiler operation command device 134 determines the operation start time of the auxiliary boiler, the reheating time of the auxiliary boiler, Calculate and set the fuel flow pattern, auxiliary boiler pressure increase rate, etc.

0012 This signal from the auxiliary boiler operation command device 134 causes the auxiliary boiler 2 in FIG. Operate the control valve 21 for oil in the sintering system to reheat the auxiliary boiler 2 until the sun becomes cloudy. Start from an appropriate point before the sun disappears, and note the fluctuations in the power generated when the sun hides behind the clouds. to reduce it.

[0013] Figure 4 shows the solar thermal power generation equipment adopting this invention when the amount of sunlight changes due to clouds. The behavior of the generated power, etc. is shown, and the fluctuations in the generated power are significantly smaller than in the conventional case shown in Figure 6. I know it's going to get worse.

[0014]

[Effect of the idea]

1. The biggest weakness of solar thermal power generation equipment, fluctuations in power generation due to changes in solar radiation, can be Keep it to a minimum by installing equipment to start up auxiliary boiler operation in advance by monitoring surrounding clouds. This makes it possible to minimize the inconvenience to electricity consumers.

[0015] 2. When starting up the auxiliary boiler after the conventional solar radiation amount changes, the Compared to the conventional auxiliary boiler steam pressure rise speed, the present invention allows for a sufficient margin in advance. Since the auxiliary boiler can be operated at a steam pressure rate (lower steam pressure), the life of the auxiliary boiler can be extended. A connecting effect also occurs.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a solar thermal power generation device showing an embodiment of the present invention.

FIG. 2 is a conceptual diagram related to the field of view of a solar peripheral cloud monitoring device.

FIG. 3 is a conceptual diagram of signal processing in a solar cloud monitoring device.

[Figure 4] Amount of heat collected by solar power generation equipment adopting this invention,
A diagram showing the relationship between main line steam pressure, generated power, etc.

FIG. 5 is a system diagram of a conventional device.

FIG. 6 is a diagram corresponding to FIG. 4 of a conventional device.

[Explanation of symbols]

1... Solar boiler, 2... Auxiliary boiler, 4... Steam turbine, 5... Generator, 11... Concentrator, 12... Heat collector, 13...
Surrounding solar cloud monitoring device, 21...control valve, 22...burner, 3
3...Pressure control valve, 35...Adder, 131...ITV, 13
2... Image processing device, 133... Sun shading determination device, 134
...Auxiliary boiler operation command device.

Claims (1)

[Scope of utility model registration request] Claim 1: A solar power generation facility having a solar heat collector and a heat collector, a solar heat boiler and an auxiliary boiler,
A solar thermal power generation facility comprising a solar cloud monitoring device for monitoring the state of clouds around the sun, and a means for instructing the start-up of an auxiliary boiler based on a signal from the solar cloud monitoring device. Control device.